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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/avr32/kernel
Initial import
Diffstat (limited to 'arch/avr32/kernel')
-rw-r--r--arch/avr32/kernel/.gitignore1
-rw-r--r--arch/avr32/kernel/Makefile15
-rw-r--r--arch/avr32/kernel/asm-offsets.c24
-rw-r--r--arch/avr32/kernel/avr32_ksyms.c70
-rw-r--r--arch/avr32/kernel/cpu.c410
-rw-r--r--arch/avr32/kernel/entry-avr32b.S877
-rw-r--r--arch/avr32/kernel/head.S22
-rw-r--r--arch/avr32/kernel/irq.c28
-rw-r--r--arch/avr32/kernel/kprobes.c267
-rw-r--r--arch/avr32/kernel/module.c291
-rw-r--r--arch/avr32/kernel/nmi_debug.c82
-rw-r--r--arch/avr32/kernel/ocd.c167
-rw-r--r--arch/avr32/kernel/process.c355
-rw-r--r--arch/avr32/kernel/ptrace.c356
-rw-r--r--arch/avr32/kernel/setup.c609
-rw-r--r--arch/avr32/kernel/signal.c288
-rw-r--r--arch/avr32/kernel/stacktrace.c55
-rw-r--r--arch/avr32/kernel/switch_to.S35
-rw-r--r--arch/avr32/kernel/syscall-stubs.S126
-rw-r--r--arch/avr32/kernel/syscall_table.S337
-rw-r--r--arch/avr32/kernel/time.c160
-rw-r--r--arch/avr32/kernel/traps.c261
-rw-r--r--arch/avr32/kernel/vmlinux.lds.S88
23 files changed, 4924 insertions, 0 deletions
diff --git a/arch/avr32/kernel/.gitignore b/arch/avr32/kernel/.gitignore
new file mode 100644
index 000000000..c5f676c3c
--- /dev/null
+++ b/arch/avr32/kernel/.gitignore
@@ -0,0 +1 @@
+vmlinux.lds
diff --git a/arch/avr32/kernel/Makefile b/arch/avr32/kernel/Makefile
new file mode 100644
index 000000000..119a2e41d
--- /dev/null
+++ b/arch/avr32/kernel/Makefile
@@ -0,0 +1,15 @@
+#
+# Makefile for the Linux/AVR32 kernel.
+#
+
+extra-y := head.o vmlinux.lds
+
+obj-$(CONFIG_SUBARCH_AVR32B) += entry-avr32b.o
+obj-y += syscall_table.o syscall-stubs.o irq.o
+obj-y += setup.o traps.o ocd.o ptrace.o
+obj-y += signal.o process.o time.o
+obj-y += switch_to.o cpu.o
+obj-$(CONFIG_MODULES) += module.o avr32_ksyms.o
+obj-$(CONFIG_KPROBES) += kprobes.o
+obj-$(CONFIG_STACKTRACE) += stacktrace.o
+obj-$(CONFIG_NMI_DEBUGGING) += nmi_debug.o
diff --git a/arch/avr32/kernel/asm-offsets.c b/arch/avr32/kernel/asm-offsets.c
new file mode 100644
index 000000000..2c9764fe3
--- /dev/null
+++ b/arch/avr32/kernel/asm-offsets.c
@@ -0,0 +1,24 @@
+/*
+ * Generate definitions needed by assembly language modules.
+ * This code generates raw asm output which is post-processed
+ * to extract and format the required data.
+ */
+
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/thread_info.h>
+#include <linux/kbuild.h>
+
+void foo(void)
+{
+ OFFSET(TI_task, thread_info, task);
+ OFFSET(TI_flags, thread_info, flags);
+ OFFSET(TI_cpu, thread_info, cpu);
+ OFFSET(TI_preempt_count, thread_info, preempt_count);
+ OFFSET(TI_rar_saved, thread_info, rar_saved);
+ OFFSET(TI_rsr_saved, thread_info, rsr_saved);
+ BLANK();
+ OFFSET(TSK_active_mm, task_struct, active_mm);
+ BLANK();
+ OFFSET(MM_pgd, mm_struct, pgd);
+}
diff --git a/arch/avr32/kernel/avr32_ksyms.c b/arch/avr32/kernel/avr32_ksyms.c
new file mode 100644
index 000000000..d93ead02d
--- /dev/null
+++ b/arch/avr32/kernel/avr32_ksyms.c
@@ -0,0 +1,70 @@
+/*
+ * Export AVR32-specific functions for loadable modules.
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+
+#include <asm/checksum.h>
+#include <asm/uaccess.h>
+
+/*
+ * GCC functions
+ */
+extern unsigned long long __avr32_lsl64(unsigned long long u, unsigned long b);
+extern unsigned long long __avr32_lsr64(unsigned long long u, unsigned long b);
+extern unsigned long long __avr32_asr64(unsigned long long u, unsigned long b);
+EXPORT_SYMBOL(__avr32_lsl64);
+EXPORT_SYMBOL(__avr32_lsr64);
+EXPORT_SYMBOL(__avr32_asr64);
+
+/*
+ * String functions
+ */
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memcpy);
+
+EXPORT_SYMBOL(clear_page);
+EXPORT_SYMBOL(copy_page);
+
+/*
+ * Userspace access stuff.
+ */
+EXPORT_SYMBOL(copy_from_user);
+EXPORT_SYMBOL(copy_to_user);
+EXPORT_SYMBOL(__copy_user);
+EXPORT_SYMBOL(strncpy_from_user);
+EXPORT_SYMBOL(__strncpy_from_user);
+EXPORT_SYMBOL(clear_user);
+EXPORT_SYMBOL(__clear_user);
+EXPORT_SYMBOL(strnlen_user);
+
+EXPORT_SYMBOL(csum_partial);
+EXPORT_SYMBOL(csum_partial_copy_generic);
+
+/* Delay loops (lib/delay.S) */
+EXPORT_SYMBOL(__ndelay);
+EXPORT_SYMBOL(__udelay);
+EXPORT_SYMBOL(__const_udelay);
+
+/* Bit operations (lib/findbit.S) */
+EXPORT_SYMBOL(find_first_zero_bit);
+EXPORT_SYMBOL(find_next_zero_bit);
+EXPORT_SYMBOL(find_first_bit);
+EXPORT_SYMBOL(find_next_bit);
+EXPORT_SYMBOL(find_next_bit_le);
+EXPORT_SYMBOL(find_next_zero_bit_le);
+
+/* I/O primitives (lib/io-*.S) */
+EXPORT_SYMBOL(__raw_readsb);
+EXPORT_SYMBOL(__raw_readsw);
+EXPORT_SYMBOL(__raw_readsl);
+EXPORT_SYMBOL(__raw_writesb);
+EXPORT_SYMBOL(__raw_writesw);
+EXPORT_SYMBOL(__raw_writesl);
diff --git a/arch/avr32/kernel/cpu.c b/arch/avr32/kernel/cpu.c
new file mode 100644
index 000000000..0341ae27c
--- /dev/null
+++ b/arch/avr32/kernel/cpu.c
@@ -0,0 +1,410 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/seq_file.h>
+#include <linux/cpu.h>
+#include <linux/module.h>
+#include <linux/percpu.h>
+#include <linux/param.h>
+#include <linux/errno.h>
+#include <linux/clk.h>
+
+#include <asm/setup.h>
+#include <asm/sysreg.h>
+
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+
+#ifdef CONFIG_PERFORMANCE_COUNTERS
+
+/*
+ * XXX: If/when a SMP-capable implementation of AVR32 will ever be
+ * made, we must make sure that the code executes on the correct CPU.
+ */
+static ssize_t show_pc0event(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pccr;
+
+ pccr = sysreg_read(PCCR);
+ return sprintf(buf, "0x%lx\n", (pccr >> 12) & 0x3f);
+}
+static ssize_t store_pc0event(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ if (val > 0x3f)
+ return -EINVAL;
+ val = (val << 12) | (sysreg_read(PCCR) & 0xfffc0fff);
+ sysreg_write(PCCR, val);
+ return count;
+}
+static ssize_t show_pc0count(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pcnt0;
+
+ pcnt0 = sysreg_read(PCNT0);
+ return sprintf(buf, "%lu\n", pcnt0);
+}
+static ssize_t store_pc0count(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ sysreg_write(PCNT0, val);
+
+ return count;
+}
+
+static ssize_t show_pc1event(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pccr;
+
+ pccr = sysreg_read(PCCR);
+ return sprintf(buf, "0x%lx\n", (pccr >> 18) & 0x3f);
+}
+static ssize_t store_pc1event(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ if (val > 0x3f)
+ return -EINVAL;
+ val = (val << 18) | (sysreg_read(PCCR) & 0xff03ffff);
+ sysreg_write(PCCR, val);
+ return count;
+}
+static ssize_t show_pc1count(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pcnt1;
+
+ pcnt1 = sysreg_read(PCNT1);
+ return sprintf(buf, "%lu\n", pcnt1);
+}
+static ssize_t store_pc1count(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ sysreg_write(PCNT1, val);
+
+ return count;
+}
+
+static ssize_t show_pccycles(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pccnt;
+
+ pccnt = sysreg_read(PCCNT);
+ return sprintf(buf, "%lu\n", pccnt);
+}
+static ssize_t store_pccycles(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ unsigned long val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ sysreg_write(PCCNT, val);
+
+ return count;
+}
+
+static ssize_t show_pcenable(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ unsigned long pccr;
+
+ pccr = sysreg_read(PCCR);
+ return sprintf(buf, "%c\n", (pccr & 1)?'1':'0');
+}
+static ssize_t store_pcenable(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
+{
+ unsigned long pccr, val;
+ int ret;
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret)
+ return ret;
+ if (val)
+ val = 1;
+
+ pccr = sysreg_read(PCCR);
+ pccr = (pccr & ~1UL) | val;
+ sysreg_write(PCCR, pccr);
+
+ return count;
+}
+
+static DEVICE_ATTR(pc0event, 0600, show_pc0event, store_pc0event);
+static DEVICE_ATTR(pc0count, 0600, show_pc0count, store_pc0count);
+static DEVICE_ATTR(pc1event, 0600, show_pc1event, store_pc1event);
+static DEVICE_ATTR(pc1count, 0600, show_pc1count, store_pc1count);
+static DEVICE_ATTR(pccycles, 0600, show_pccycles, store_pccycles);
+static DEVICE_ATTR(pcenable, 0600, show_pcenable, store_pcenable);
+
+#endif /* CONFIG_PERFORMANCE_COUNTERS */
+
+static int __init topology_init(void)
+{
+ int cpu;
+
+ for_each_possible_cpu(cpu) {
+ struct cpu *c = &per_cpu(cpu_devices, cpu);
+
+ register_cpu(c, cpu);
+
+#ifdef CONFIG_PERFORMANCE_COUNTERS
+ device_create_file(&c->dev, &dev_attr_pc0event);
+ device_create_file(&c->dev, &dev_attr_pc0count);
+ device_create_file(&c->dev, &dev_attr_pc1event);
+ device_create_file(&c->dev, &dev_attr_pc1count);
+ device_create_file(&c->dev, &dev_attr_pccycles);
+ device_create_file(&c->dev, &dev_attr_pcenable);
+#endif
+ }
+
+ return 0;
+}
+
+subsys_initcall(topology_init);
+
+struct chip_id_map {
+ u16 mid;
+ u16 pn;
+ const char *name;
+};
+
+static const struct chip_id_map chip_names[] = {
+ { .mid = 0x1f, .pn = 0x1e82, .name = "AT32AP700x" },
+};
+#define NR_CHIP_NAMES ARRAY_SIZE(chip_names)
+
+static const char *cpu_names[] = {
+ "Morgan",
+ "AP7",
+};
+#define NR_CPU_NAMES ARRAY_SIZE(cpu_names)
+
+static const char *arch_names[] = {
+ "AVR32A",
+ "AVR32B",
+};
+#define NR_ARCH_NAMES ARRAY_SIZE(arch_names)
+
+static const char *mmu_types[] = {
+ "No MMU",
+ "ITLB and DTLB",
+ "Shared TLB",
+ "MPU"
+};
+
+static const char *cpu_feature_flags[] = {
+ "rmw", "dsp", "simd", "ocd", "perfctr", "java", "fpu",
+};
+
+static const char *get_chip_name(struct avr32_cpuinfo *cpu)
+{
+ unsigned int i;
+ unsigned int mid = avr32_get_manufacturer_id(cpu);
+ unsigned int pn = avr32_get_product_number(cpu);
+
+ for (i = 0; i < NR_CHIP_NAMES; i++) {
+ if (chip_names[i].mid == mid && chip_names[i].pn == pn)
+ return chip_names[i].name;
+ }
+
+ return "(unknown)";
+}
+
+void __init setup_processor(void)
+{
+ unsigned long config0, config1;
+ unsigned long features;
+ unsigned cpu_id, cpu_rev, arch_id, arch_rev, mmu_type;
+ unsigned device_id;
+ unsigned tmp;
+ unsigned i;
+
+ config0 = sysreg_read(CONFIG0);
+ config1 = sysreg_read(CONFIG1);
+ cpu_id = SYSREG_BFEXT(PROCESSORID, config0);
+ cpu_rev = SYSREG_BFEXT(PROCESSORREVISION, config0);
+ arch_id = SYSREG_BFEXT(AT, config0);
+ arch_rev = SYSREG_BFEXT(AR, config0);
+ mmu_type = SYSREG_BFEXT(MMUT, config0);
+
+ device_id = ocd_read(DID);
+
+ boot_cpu_data.arch_type = arch_id;
+ boot_cpu_data.cpu_type = cpu_id;
+ boot_cpu_data.arch_revision = arch_rev;
+ boot_cpu_data.cpu_revision = cpu_rev;
+ boot_cpu_data.tlb_config = mmu_type;
+ boot_cpu_data.device_id = device_id;
+
+ tmp = SYSREG_BFEXT(ILSZ, config1);
+ if (tmp) {
+ boot_cpu_data.icache.ways = 1 << SYSREG_BFEXT(IASS, config1);
+ boot_cpu_data.icache.sets = 1 << SYSREG_BFEXT(ISET, config1);
+ boot_cpu_data.icache.linesz = 1 << (tmp + 1);
+ }
+ tmp = SYSREG_BFEXT(DLSZ, config1);
+ if (tmp) {
+ boot_cpu_data.dcache.ways = 1 << SYSREG_BFEXT(DASS, config1);
+ boot_cpu_data.dcache.sets = 1 << SYSREG_BFEXT(DSET, config1);
+ boot_cpu_data.dcache.linesz = 1 << (tmp + 1);
+ }
+
+ if ((cpu_id >= NR_CPU_NAMES) || (arch_id >= NR_ARCH_NAMES)) {
+ printk ("Unknown CPU configuration (ID %02x, arch %02x), "
+ "continuing anyway...\n",
+ cpu_id, arch_id);
+ return;
+ }
+
+ printk ("CPU: %s chip revision %c\n", get_chip_name(&boot_cpu_data),
+ avr32_get_chip_revision(&boot_cpu_data) + 'A');
+ printk ("CPU: %s [%02x] core revision %d (%s arch revision %d)\n",
+ cpu_names[cpu_id], cpu_id, cpu_rev,
+ arch_names[arch_id], arch_rev);
+ printk ("CPU: MMU configuration: %s\n", mmu_types[mmu_type]);
+
+ printk ("CPU: features:");
+ features = 0;
+ if (config0 & SYSREG_BIT(CONFIG0_R))
+ features |= AVR32_FEATURE_RMW;
+ if (config0 & SYSREG_BIT(CONFIG0_D))
+ features |= AVR32_FEATURE_DSP;
+ if (config0 & SYSREG_BIT(CONFIG0_S))
+ features |= AVR32_FEATURE_SIMD;
+ if (config0 & SYSREG_BIT(CONFIG0_O))
+ features |= AVR32_FEATURE_OCD;
+ if (config0 & SYSREG_BIT(CONFIG0_P))
+ features |= AVR32_FEATURE_PCTR;
+ if (config0 & SYSREG_BIT(CONFIG0_J))
+ features |= AVR32_FEATURE_JAVA;
+ if (config0 & SYSREG_BIT(CONFIG0_F))
+ features |= AVR32_FEATURE_FPU;
+
+ for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
+ if (features & (1 << i))
+ printk(" %s", cpu_feature_flags[i]);
+
+ printk("\n");
+ boot_cpu_data.features = features;
+}
+
+#ifdef CONFIG_PROC_FS
+static int c_show(struct seq_file *m, void *v)
+{
+ unsigned int icache_size, dcache_size;
+ unsigned int cpu = smp_processor_id();
+ unsigned int freq;
+ unsigned int i;
+
+ icache_size = boot_cpu_data.icache.ways *
+ boot_cpu_data.icache.sets *
+ boot_cpu_data.icache.linesz;
+ dcache_size = boot_cpu_data.dcache.ways *
+ boot_cpu_data.dcache.sets *
+ boot_cpu_data.dcache.linesz;
+
+ seq_printf(m, "processor\t: %d\n", cpu);
+
+ seq_printf(m, "chip type\t: %s revision %c\n",
+ get_chip_name(&boot_cpu_data),
+ avr32_get_chip_revision(&boot_cpu_data) + 'A');
+ if (boot_cpu_data.arch_type < NR_ARCH_NAMES)
+ seq_printf(m, "cpu arch\t: %s revision %d\n",
+ arch_names[boot_cpu_data.arch_type],
+ boot_cpu_data.arch_revision);
+ if (boot_cpu_data.cpu_type < NR_CPU_NAMES)
+ seq_printf(m, "cpu core\t: %s revision %d\n",
+ cpu_names[boot_cpu_data.cpu_type],
+ boot_cpu_data.cpu_revision);
+
+ freq = (clk_get_rate(boot_cpu_data.clk) + 500) / 1000;
+ seq_printf(m, "cpu MHz\t\t: %u.%03u\n", freq / 1000, freq % 1000);
+
+ seq_printf(m, "i-cache\t\t: %dK (%u ways x %u sets x %u)\n",
+ icache_size >> 10,
+ boot_cpu_data.icache.ways,
+ boot_cpu_data.icache.sets,
+ boot_cpu_data.icache.linesz);
+ seq_printf(m, "d-cache\t\t: %dK (%u ways x %u sets x %u)\n",
+ dcache_size >> 10,
+ boot_cpu_data.dcache.ways,
+ boot_cpu_data.dcache.sets,
+ boot_cpu_data.dcache.linesz);
+
+ seq_printf(m, "features\t:");
+ for (i = 0; i < ARRAY_SIZE(cpu_feature_flags); i++)
+ if (boot_cpu_data.features & (1 << i))
+ seq_printf(m, " %s", cpu_feature_flags[i]);
+
+ seq_printf(m, "\nbogomips\t: %lu.%02lu\n",
+ boot_cpu_data.loops_per_jiffy / (500000/HZ),
+ (boot_cpu_data.loops_per_jiffy / (5000/HZ)) % 100);
+
+ return 0;
+}
+
+static void *c_start(struct seq_file *m, loff_t *pos)
+{
+ return *pos < 1 ? (void *)1 : NULL;
+}
+
+static void *c_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ ++*pos;
+ return NULL;
+}
+
+static void c_stop(struct seq_file *m, void *v)
+{
+
+}
+
+const struct seq_operations cpuinfo_op = {
+ .start = c_start,
+ .next = c_next,
+ .stop = c_stop,
+ .show = c_show
+};
+#endif /* CONFIG_PROC_FS */
diff --git a/arch/avr32/kernel/entry-avr32b.S b/arch/avr32/kernel/entry-avr32b.S
new file mode 100644
index 000000000..7301f4806
--- /dev/null
+++ b/arch/avr32/kernel/entry-avr32b.S
@@ -0,0 +1,877 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * This file contains the low-level entry-points into the kernel, that is,
+ * exception handlers, debug trap handlers, interrupt handlers and the
+ * system call handler.
+ */
+#include <linux/errno.h>
+
+#include <asm/asm.h>
+#include <asm/hardirq.h>
+#include <asm/irq.h>
+#include <asm/ocd.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/ptrace.h>
+#include <asm/sysreg.h>
+#include <asm/thread_info.h>
+#include <asm/unistd.h>
+
+#ifdef CONFIG_PREEMPT
+# define preempt_stop mask_interrupts
+#else
+# define preempt_stop
+# define fault_resume_kernel fault_restore_all
+#endif
+
+#define __MASK(x) ((1 << (x)) - 1)
+#define IRQ_MASK ((__MASK(SOFTIRQ_BITS) << SOFTIRQ_SHIFT) | \
+ (__MASK(HARDIRQ_BITS) << HARDIRQ_SHIFT))
+
+ .section .ex.text,"ax",@progbits
+ .align 2
+exception_vectors:
+ bral handle_critical
+ .align 2
+ bral handle_critical
+ .align 2
+ bral do_bus_error_write
+ .align 2
+ bral do_bus_error_read
+ .align 2
+ bral do_nmi_ll
+ .align 2
+ bral handle_address_fault
+ .align 2
+ bral handle_protection_fault
+ .align 2
+ bral handle_debug
+ .align 2
+ bral do_illegal_opcode_ll
+ .align 2
+ bral do_illegal_opcode_ll
+ .align 2
+ bral do_illegal_opcode_ll
+ .align 2
+ bral do_fpe_ll
+ .align 2
+ bral do_illegal_opcode_ll
+ .align 2
+ bral handle_address_fault
+ .align 2
+ bral handle_address_fault
+ .align 2
+ bral handle_protection_fault
+ .align 2
+ bral handle_protection_fault
+ .align 2
+ bral do_dtlb_modified
+
+#define tlbmiss_save pushm r0-r3
+#define tlbmiss_restore popm r0-r3
+
+ .org 0x50
+ .global itlb_miss
+itlb_miss:
+ tlbmiss_save
+ rjmp tlb_miss_common
+
+ .org 0x60
+dtlb_miss_read:
+ tlbmiss_save
+ rjmp tlb_miss_common
+
+ .org 0x70
+dtlb_miss_write:
+ tlbmiss_save
+
+ .global tlb_miss_common
+ .align 2
+tlb_miss_common:
+ mfsr r0, SYSREG_TLBEAR
+ mfsr r1, SYSREG_PTBR
+
+ /*
+ * First level lookup: The PGD contains virtual pointers to
+ * the second-level page tables, but they may be NULL if not
+ * present.
+ */
+pgtbl_lookup:
+ lsr r2, r0, PGDIR_SHIFT
+ ld.w r3, r1[r2 << 2]
+ bfextu r1, r0, PAGE_SHIFT, PGDIR_SHIFT - PAGE_SHIFT
+ cp.w r3, 0
+ breq page_table_not_present
+
+ /* Second level lookup */
+ ld.w r2, r3[r1 << 2]
+ mfsr r0, SYSREG_TLBARLO
+ bld r2, _PAGE_BIT_PRESENT
+ brcc page_not_present
+
+ /* Mark the page as accessed */
+ sbr r2, _PAGE_BIT_ACCESSED
+ st.w r3[r1 << 2], r2
+
+ /* Drop software flags */
+ andl r2, _PAGE_FLAGS_HARDWARE_MASK & 0xffff
+ mtsr SYSREG_TLBELO, r2
+
+ /* Figure out which entry we want to replace */
+ mfsr r1, SYSREG_MMUCR
+ clz r2, r0
+ brcc 1f
+ mov r3, -1 /* All entries have been accessed, */
+ mov r2, 0 /* so start at 0 */
+ mtsr SYSREG_TLBARLO, r3 /* and reset TLBAR */
+
+1: bfins r1, r2, SYSREG_DRP_OFFSET, SYSREG_DRP_SIZE
+ mtsr SYSREG_MMUCR, r1
+ tlbw
+
+ tlbmiss_restore
+ rete
+
+ /* The slow path of the TLB miss handler */
+ .align 2
+page_table_not_present:
+ /* Do we need to synchronize with swapper_pg_dir? */
+ bld r0, 31
+ brcs sync_with_swapper_pg_dir
+
+page_not_present:
+ tlbmiss_restore
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_page_fault
+ rjmp ret_from_exception
+
+ .align 2
+sync_with_swapper_pg_dir:
+ /*
+ * If swapper_pg_dir contains a non-NULL second-level page
+ * table pointer, copy it into the current PGD. If not, we
+ * must handle it as a full-blown page fault.
+ *
+ * Jumping back to pgtbl_lookup causes an unnecessary lookup,
+ * but it is guaranteed to be a cache hit, it won't happen
+ * very often, and we absolutely do not want to sacrifice any
+ * performance in the fast path in order to improve this.
+ */
+ mov r1, lo(swapper_pg_dir)
+ orh r1, hi(swapper_pg_dir)
+ ld.w r3, r1[r2 << 2]
+ cp.w r3, 0
+ breq page_not_present
+ mfsr r1, SYSREG_PTBR
+ st.w r1[r2 << 2], r3
+ rjmp pgtbl_lookup
+
+ /*
+ * We currently have two bytes left at this point until we
+ * crash into the system call handler...
+ *
+ * Don't worry, the assembler will let us know.
+ */
+
+
+ /* --- System Call --- */
+
+ .org 0x100
+system_call:
+#ifdef CONFIG_PREEMPT
+ mask_interrupts
+#endif
+ pushm r12 /* r12_orig */
+ stmts --sp, r0-lr
+
+ mfsr r0, SYSREG_RAR_SUP
+ mfsr r1, SYSREG_RSR_SUP
+#ifdef CONFIG_PREEMPT
+ unmask_interrupts
+#endif
+ zero_fp
+ stm --sp, r0-r1
+
+ /* check for syscall tracing */
+ get_thread_info r0
+ ld.w r1, r0[TI_flags]
+ bld r1, TIF_SYSCALL_TRACE
+ brcs syscall_trace_enter
+
+syscall_trace_cont:
+ cp.w r8, NR_syscalls
+ brhs syscall_badsys
+
+ lddpc lr, syscall_table_addr
+ ld.w lr, lr[r8 << 2]
+ mov r8, r5 /* 5th argument (6th is pushed by stub) */
+ icall lr
+
+ .global syscall_return
+syscall_return:
+ get_thread_info r0
+ mask_interrupts /* make sure we don't miss an interrupt
+ setting need_resched or sigpending
+ between sampling and the rets */
+
+ /* Store the return value so that the correct value is loaded below */
+ stdsp sp[REG_R12], r12
+
+ ld.w r1, r0[TI_flags]
+ andl r1, _TIF_ALLWORK_MASK, COH
+ brne syscall_exit_work
+
+syscall_exit_cont:
+ popm r8-r9
+ mtsr SYSREG_RAR_SUP, r8
+ mtsr SYSREG_RSR_SUP, r9
+ ldmts sp++, r0-lr
+ sub sp, -4 /* r12_orig */
+ rets
+
+ .align 2
+syscall_table_addr:
+ .long sys_call_table
+
+syscall_badsys:
+ mov r12, -ENOSYS
+ rjmp syscall_return
+
+ .global ret_from_fork
+ret_from_fork:
+ call schedule_tail
+ mov r12, 0
+ rjmp syscall_return
+
+ .global ret_from_kernel_thread
+ret_from_kernel_thread:
+ call schedule_tail
+ mov r12, r0
+ mov lr, r2 /* syscall_return */
+ mov pc, r1
+
+syscall_trace_enter:
+ pushm r8-r12
+ call syscall_trace
+ popm r8-r12
+ rjmp syscall_trace_cont
+
+syscall_exit_work:
+ bld r1, TIF_SYSCALL_TRACE
+ brcc 1f
+ unmask_interrupts
+ call syscall_trace
+ mask_interrupts
+ ld.w r1, r0[TI_flags]
+
+1: bld r1, TIF_NEED_RESCHED
+ brcc 2f
+ unmask_interrupts
+ call schedule
+ mask_interrupts
+ ld.w r1, r0[TI_flags]
+ rjmp 1b
+
+2: mov r2, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
+ tst r1, r2
+ breq 3f
+ unmask_interrupts
+ mov r12, sp
+ mov r11, r0
+ call do_notify_resume
+ mask_interrupts
+ ld.w r1, r0[TI_flags]
+ rjmp 1b
+
+3: bld r1, TIF_BREAKPOINT
+ brcc syscall_exit_cont
+ rjmp enter_monitor_mode
+
+ /* This function expects to find offending PC in SYSREG_RAR_EX */
+ .type save_full_context_ex, @function
+ .align 2
+save_full_context_ex:
+ mfsr r11, SYSREG_RAR_EX
+ sub r9, pc, . - debug_trampoline
+ mfsr r8, SYSREG_RSR_EX
+ cp.w r9, r11
+ breq 3f
+ mov r12, r8
+ andh r8, (MODE_MASK >> 16), COH
+ brne 2f
+
+1: pushm r11, r12 /* PC and SR */
+ unmask_exceptions
+ ret r12
+
+2: sub r10, sp, -(FRAME_SIZE_FULL - REG_LR)
+ stdsp sp[4], r10 /* replace saved SP */
+ rjmp 1b
+
+ /*
+ * The debug handler set up a trampoline to make us
+ * automatically enter monitor mode upon return, but since
+ * we're saving the full context, we must assume that the
+ * exception handler might want to alter the return address
+ * and/or status register. So we need to restore the original
+ * context and enter monitor mode manually after the exception
+ * has been handled.
+ */
+3: get_thread_info r8
+ ld.w r11, r8[TI_rar_saved]
+ ld.w r12, r8[TI_rsr_saved]
+ rjmp 1b
+ .size save_full_context_ex, . - save_full_context_ex
+
+ /* Low-level exception handlers */
+handle_critical:
+ /*
+ * AT32AP700x errata:
+ *
+ * After a Java stack overflow or underflow trap, any CPU
+ * memory access may cause erratic behavior. This will happen
+ * when the four least significant bits of the JOSP system
+ * register contains any value between 9 and 15 (inclusive).
+ *
+ * Possible workarounds:
+ * - Don't use the Java Extension Module
+ * - Ensure that the stack overflow and underflow trap
+ * handlers do not do any memory access or trigger any
+ * exceptions before the overflow/underflow condition is
+ * cleared (by incrementing or decrementing the JOSP)
+ * - Make sure that JOSP does not contain any problematic
+ * value before doing any exception or interrupt
+ * processing.
+ * - Set up a critical exception handler which writes a
+ * known-to-be-safe value, e.g. 4, to JOSP before doing
+ * any further processing.
+ *
+ * We'll use the last workaround for now since we cannot
+ * guarantee that user space processes don't use Java mode.
+ * Non-well-behaving userland will be terminated with extreme
+ * prejudice.
+ */
+#ifdef CONFIG_CPU_AT32AP700X
+ /*
+ * There's a chance we can't touch memory, so temporarily
+ * borrow PTBR to save the stack pointer while we fix things
+ * up...
+ */
+ mtsr SYSREG_PTBR, sp
+ mov sp, 4
+ mtsr SYSREG_JOSP, sp
+ mfsr sp, SYSREG_PTBR
+ sub pc, -2
+
+ /* Push most of pt_regs on stack. We'll do the rest later */
+ sub sp, 4
+ pushm r0-r12
+
+ /* PTBR mirrors current_thread_info()->task->active_mm->pgd */
+ get_thread_info r0
+ ld.w r1, r0[TI_task]
+ ld.w r2, r1[TSK_active_mm]
+ ld.w r3, r2[MM_pgd]
+ mtsr SYSREG_PTBR, r3
+#else
+ sub sp, 4
+ pushm r0-r12
+#endif
+ sub r0, sp, -(14 * 4)
+ mov r1, lr
+ mfsr r2, SYSREG_RAR_EX
+ mfsr r3, SYSREG_RSR_EX
+ pushm r0-r3
+
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_critical_exception
+
+ /* We should never get here... */
+bad_return:
+ sub r12, pc, (. - 1f)
+ lddpc pc, 2f
+ .align 2
+1: .asciz "Return from critical exception!"
+2: .long panic
+
+ .align 1
+do_bus_error_write:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mov r11, 1
+ rjmp 1f
+
+do_bus_error_read:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mov r11, 0
+1: mfsr r12, SYSREG_BEAR
+ mov r10, sp
+ call do_bus_error
+ rjmp ret_from_exception
+
+ .align 1
+do_nmi_ll:
+ sub sp, 4
+ stmts --sp, r0-lr
+ mfsr r9, SYSREG_RSR_NMI
+ mfsr r8, SYSREG_RAR_NMI
+ bfextu r0, r9, MODE_SHIFT, 3
+ brne 2f
+
+1: pushm r8, r9 /* PC and SR */
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_nmi
+ popm r8-r9
+ mtsr SYSREG_RAR_NMI, r8
+ tst r0, r0
+ mtsr SYSREG_RSR_NMI, r9
+ brne 3f
+
+ ldmts sp++, r0-lr
+ sub sp, -4 /* skip r12_orig */
+ rete
+
+2: sub r10, sp, -(FRAME_SIZE_FULL - REG_LR)
+ stdsp sp[4], r10 /* replace saved SP */
+ rjmp 1b
+
+3: popm lr
+ sub sp, -4 /* skip sp */
+ popm r0-r12
+ sub sp, -4 /* skip r12_orig */
+ rete
+
+handle_address_fault:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_address_exception
+ rjmp ret_from_exception
+
+handle_protection_fault:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_page_fault
+ rjmp ret_from_exception
+
+ .align 1
+do_illegal_opcode_ll:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ mfsr r12, SYSREG_ECR
+ mov r11, sp
+ call do_illegal_opcode
+ rjmp ret_from_exception
+
+do_dtlb_modified:
+ pushm r0-r3
+ mfsr r1, SYSREG_TLBEAR
+ mfsr r0, SYSREG_PTBR
+ lsr r2, r1, PGDIR_SHIFT
+ ld.w r0, r0[r2 << 2]
+ lsl r1, (32 - PGDIR_SHIFT)
+ lsr r1, (32 - PGDIR_SHIFT) + PAGE_SHIFT
+
+ /* Translate to virtual address in P1 */
+ andl r0, 0xf000
+ sbr r0, 31
+ add r2, r0, r1 << 2
+ ld.w r3, r2[0]
+ sbr r3, _PAGE_BIT_DIRTY
+ mov r0, r3
+ st.w r2[0], r3
+
+ /* The page table is up-to-date. Update the TLB entry as well */
+ andl r0, lo(_PAGE_FLAGS_HARDWARE_MASK)
+ mtsr SYSREG_TLBELO, r0
+
+ /* MMUCR[DRP] is updated automatically, so let's go... */
+ tlbw
+
+ popm r0-r3
+ rete
+
+do_fpe_ll:
+ sub sp, 4
+ stmts --sp, r0-lr
+ call save_full_context_ex
+ unmask_interrupts
+ mov r12, 26
+ mov r11, sp
+ call do_fpe
+ rjmp ret_from_exception
+
+ret_from_exception:
+ mask_interrupts
+ lddsp r4, sp[REG_SR]
+
+ andh r4, (MODE_MASK >> 16), COH
+ brne fault_resume_kernel
+
+ get_thread_info r0
+ ld.w r1, r0[TI_flags]
+ andl r1, _TIF_WORK_MASK, COH
+ brne fault_exit_work
+
+fault_resume_user:
+ popm r8-r9
+ mask_exceptions
+ mtsr SYSREG_RAR_EX, r8
+ mtsr SYSREG_RSR_EX, r9
+ ldmts sp++, r0-lr
+ sub sp, -4
+ rete
+
+fault_resume_kernel:
+#ifdef CONFIG_PREEMPT
+ get_thread_info r0
+ ld.w r2, r0[TI_preempt_count]
+ cp.w r2, 0
+ brne 1f
+ ld.w r1, r0[TI_flags]
+ bld r1, TIF_NEED_RESCHED
+ brcc 1f
+ lddsp r4, sp[REG_SR]
+ bld r4, SYSREG_GM_OFFSET
+ brcs 1f
+ call preempt_schedule_irq
+1:
+#endif
+
+ popm r8-r9
+ mask_exceptions
+ mfsr r1, SYSREG_SR
+ mtsr SYSREG_RAR_EX, r8
+ mtsr SYSREG_RSR_EX, r9
+ popm lr
+ sub sp, -4 /* ignore SP */
+ popm r0-r12
+ sub sp, -4 /* ignore r12_orig */
+ rete
+
+irq_exit_work:
+ /* Switch to exception mode so that we can share the same code. */
+ mfsr r8, SYSREG_SR
+ cbr r8, SYSREG_M0_OFFSET
+ orh r8, hi(SYSREG_BIT(M1) | SYSREG_BIT(M2))
+ mtsr SYSREG_SR, r8
+ sub pc, -2
+ get_thread_info r0
+ ld.w r1, r0[TI_flags]
+
+fault_exit_work:
+ bld r1, TIF_NEED_RESCHED
+ brcc 1f
+ unmask_interrupts
+ call schedule
+ mask_interrupts
+ ld.w r1, r0[TI_flags]
+ rjmp fault_exit_work
+
+1: mov r2, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
+ tst r1, r2
+ breq 2f
+ unmask_interrupts
+ mov r12, sp
+ mov r11, r0
+ call do_notify_resume
+ mask_interrupts
+ ld.w r1, r0[TI_flags]
+ rjmp fault_exit_work
+
+2: bld r1, TIF_BREAKPOINT
+ brcc fault_resume_user
+ rjmp enter_monitor_mode
+
+ .section .kprobes.text, "ax", @progbits
+ .type handle_debug, @function
+handle_debug:
+ sub sp, 4 /* r12_orig */
+ stmts --sp, r0-lr
+ mfsr r8, SYSREG_RAR_DBG
+ mfsr r9, SYSREG_RSR_DBG
+ unmask_exceptions
+ pushm r8-r9
+ bfextu r9, r9, SYSREG_MODE_OFFSET, SYSREG_MODE_SIZE
+ brne debug_fixup_regs
+
+.Ldebug_fixup_cont:
+#ifdef CONFIG_TRACE_IRQFLAGS
+ call trace_hardirqs_off
+#endif
+ mov r12, sp
+ call do_debug
+ mov sp, r12
+
+ lddsp r2, sp[REG_SR]
+ bfextu r3, r2, SYSREG_MODE_OFFSET, SYSREG_MODE_SIZE
+ brne debug_resume_kernel
+
+ get_thread_info r0
+ ld.w r1, r0[TI_flags]
+ mov r2, _TIF_DBGWORK_MASK
+ tst r1, r2
+ brne debug_exit_work
+
+ bld r1, TIF_SINGLE_STEP
+ brcc 1f
+ mfdr r4, OCD_DC
+ sbr r4, OCD_DC_SS_BIT
+ mtdr OCD_DC, r4
+
+1: popm r10,r11
+ mask_exceptions
+ mtsr SYSREG_RSR_DBG, r11
+ mtsr SYSREG_RAR_DBG, r10
+#ifdef CONFIG_TRACE_IRQFLAGS
+ call trace_hardirqs_on
+1:
+#endif
+ ldmts sp++, r0-lr
+ sub sp, -4
+ retd
+ .size handle_debug, . - handle_debug
+
+ /* Mode of the trapped context is in r9 */
+ .type debug_fixup_regs, @function
+debug_fixup_regs:
+ mfsr r8, SYSREG_SR
+ mov r10, r8
+ bfins r8, r9, SYSREG_MODE_OFFSET, SYSREG_MODE_SIZE
+ mtsr SYSREG_SR, r8
+ sub pc, -2
+ stdsp sp[REG_LR], lr
+ mtsr SYSREG_SR, r10
+ sub pc, -2
+ sub r8, sp, -FRAME_SIZE_FULL
+ stdsp sp[REG_SP], r8
+ rjmp .Ldebug_fixup_cont
+ .size debug_fixup_regs, . - debug_fixup_regs
+
+ .type debug_resume_kernel, @function
+debug_resume_kernel:
+ mask_exceptions
+ popm r10, r11
+ mtsr SYSREG_RAR_DBG, r10
+ mtsr SYSREG_RSR_DBG, r11
+#ifdef CONFIG_TRACE_IRQFLAGS
+ bld r11, SYSREG_GM_OFFSET
+ brcc 1f
+ call trace_hardirqs_on
+1:
+#endif
+ mfsr r2, SYSREG_SR
+ mov r1, r2
+ bfins r2, r3, SYSREG_MODE_OFFSET, SYSREG_MODE_SIZE
+ mtsr SYSREG_SR, r2
+ sub pc, -2
+ popm lr
+ mtsr SYSREG_SR, r1
+ sub pc, -2
+ sub sp, -4 /* skip SP */
+ popm r0-r12
+ sub sp, -4
+ retd
+ .size debug_resume_kernel, . - debug_resume_kernel
+
+ .type debug_exit_work, @function
+debug_exit_work:
+ /*
+ * We must return from Monitor Mode using a retd, and we must
+ * not schedule since that involves the D bit in SR getting
+ * cleared by something other than the debug hardware. This
+ * may cause undefined behaviour according to the Architecture
+ * manual.
+ *
+ * So we fix up the return address and status and return to a
+ * stub below in Exception mode. From there, we can follow the
+ * normal exception return path.
+ *
+ * The real return address and status registers are stored on
+ * the stack in the way the exception return path understands,
+ * so no need to fix anything up there.
+ */
+ sub r8, pc, . - fault_exit_work
+ mtsr SYSREG_RAR_DBG, r8
+ mov r9, 0
+ orh r9, hi(SR_EM | SR_GM | MODE_EXCEPTION)
+ mtsr SYSREG_RSR_DBG, r9
+ sub pc, -2
+ retd
+ .size debug_exit_work, . - debug_exit_work
+
+ .set rsr_int0, SYSREG_RSR_INT0
+ .set rsr_int1, SYSREG_RSR_INT1
+ .set rsr_int2, SYSREG_RSR_INT2
+ .set rsr_int3, SYSREG_RSR_INT3
+ .set rar_int0, SYSREG_RAR_INT0
+ .set rar_int1, SYSREG_RAR_INT1
+ .set rar_int2, SYSREG_RAR_INT2
+ .set rar_int3, SYSREG_RAR_INT3
+
+ .macro IRQ_LEVEL level
+ .type irq_level\level, @function
+irq_level\level:
+ sub sp, 4 /* r12_orig */
+ stmts --sp,r0-lr
+ mfsr r8, rar_int\level
+ mfsr r9, rsr_int\level
+
+#ifdef CONFIG_PREEMPT
+ sub r11, pc, (. - system_call)
+ cp.w r11, r8
+ breq 4f
+#endif
+
+ pushm r8-r9
+
+ mov r11, sp
+ mov r12, \level
+
+ call do_IRQ
+
+ lddsp r4, sp[REG_SR]
+ bfextu r4, r4, SYSREG_M0_OFFSET, 3
+ cp.w r4, MODE_SUPERVISOR >> SYSREG_M0_OFFSET
+ breq 2f
+ cp.w r4, MODE_USER >> SYSREG_M0_OFFSET
+#ifdef CONFIG_PREEMPT
+ brne 3f
+#else
+ brne 1f
+#endif
+
+ get_thread_info r0
+ ld.w r1, r0[TI_flags]
+ andl r1, _TIF_WORK_MASK, COH
+ brne irq_exit_work
+
+1:
+#ifdef CONFIG_TRACE_IRQFLAGS
+ call trace_hardirqs_on
+#endif
+ popm r8-r9
+ mtsr rar_int\level, r8
+ mtsr rsr_int\level, r9
+ ldmts sp++,r0-lr
+ sub sp, -4 /* ignore r12_orig */
+ rete
+
+#ifdef CONFIG_PREEMPT
+4: mask_interrupts
+ mfsr r8, rsr_int\level
+ sbr r8, 16
+ mtsr rsr_int\level, r8
+ ldmts sp++, r0-lr
+ sub sp, -4 /* ignore r12_orig */
+ rete
+#endif
+
+2: get_thread_info r0
+ ld.w r1, r0[TI_flags]
+ bld r1, TIF_CPU_GOING_TO_SLEEP
+#ifdef CONFIG_PREEMPT
+ brcc 3f
+#else
+ brcc 1b
+#endif
+ sub r1, pc, . - cpu_idle_skip_sleep
+ stdsp sp[REG_PC], r1
+#ifdef CONFIG_PREEMPT
+3: get_thread_info r0
+ ld.w r2, r0[TI_preempt_count]
+ cp.w r2, 0
+ brne 1b
+ ld.w r1, r0[TI_flags]
+ bld r1, TIF_NEED_RESCHED
+ brcc 1b
+ lddsp r4, sp[REG_SR]
+ bld r4, SYSREG_GM_OFFSET
+ brcs 1b
+ call preempt_schedule_irq
+#endif
+ rjmp 1b
+ .endm
+
+ .section .irq.text,"ax",@progbits
+
+ .global irq_level0
+ .global irq_level1
+ .global irq_level2
+ .global irq_level3
+ IRQ_LEVEL 0
+ IRQ_LEVEL 1
+ IRQ_LEVEL 2
+ IRQ_LEVEL 3
+
+ .section .kprobes.text, "ax", @progbits
+ .type enter_monitor_mode, @function
+enter_monitor_mode:
+ /*
+ * We need to enter monitor mode to do a single step. The
+ * monitor code will alter the return address so that we
+ * return directly to the user instead of returning here.
+ */
+ breakpoint
+ rjmp breakpoint_failed
+
+ .size enter_monitor_mode, . - enter_monitor_mode
+
+ .type debug_trampoline, @function
+ .global debug_trampoline
+debug_trampoline:
+ /*
+ * Save the registers on the stack so that the monitor code
+ * can find them easily.
+ */
+ sub sp, 4 /* r12_orig */
+ stmts --sp, r0-lr
+ get_thread_info r0
+ ld.w r8, r0[TI_rar_saved]
+ ld.w r9, r0[TI_rsr_saved]
+ pushm r8-r9
+
+ /*
+ * The monitor code will alter the return address so we don't
+ * return here.
+ */
+ breakpoint
+ rjmp breakpoint_failed
+ .size debug_trampoline, . - debug_trampoline
+
+ .type breakpoint_failed, @function
+breakpoint_failed:
+ /*
+ * Something went wrong. Perhaps the debug hardware isn't
+ * enabled?
+ */
+ lda.w r12, msg_breakpoint_failed
+ mov r11, sp
+ mov r10, 9 /* SIGKILL */
+ call die
+1: rjmp 1b
+
+msg_breakpoint_failed:
+ .asciz "Failed to enter Debug Mode"
diff --git a/arch/avr32/kernel/head.S b/arch/avr32/kernel/head.S
new file mode 100644
index 000000000..59eae6dfb
--- /dev/null
+++ b/arch/avr32/kernel/head.S
@@ -0,0 +1,22 @@
+/*
+ * Non-board-specific low-level startup code
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/linkage.h>
+
+#include <asm/page.h>
+
+ .section .init.text,"ax"
+ .global kernel_entry
+kernel_entry:
+ /* Start the show */
+ lddpc pc, kernel_start_addr
+
+ .align 2
+kernel_start_addr:
+ .long start_kernel
diff --git a/arch/avr32/kernel/irq.c b/arch/avr32/kernel/irq.c
new file mode 100644
index 000000000..900e49b22
--- /dev/null
+++ b/arch/avr32/kernel/irq.c
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * Based on arch/i386/kernel/irq.c
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel_stat.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/device.h>
+
+/* May be overridden by platform code */
+int __weak nmi_enable(void)
+{
+ return -ENOSYS;
+}
+
+void __weak nmi_disable(void)
+{
+
+}
diff --git a/arch/avr32/kernel/kprobes.c b/arch/avr32/kernel/kprobes.c
new file mode 100644
index 000000000..a94ece4a7
--- /dev/null
+++ b/arch/avr32/kernel/kprobes.c
@@ -0,0 +1,267 @@
+/*
+ * Kernel Probes (KProbes)
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * Based on arch/ppc64/kernel/kprobes.c
+ * Copyright (C) IBM Corporation, 2002, 2004
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kprobes.h>
+#include <linux/ptrace.h>
+
+#include <asm/cacheflush.h>
+#include <linux/kdebug.h>
+#include <asm/ocd.h>
+
+DEFINE_PER_CPU(struct kprobe *, current_kprobe);
+static unsigned long kprobe_status;
+static struct pt_regs jprobe_saved_regs;
+
+struct kretprobe_blackpoint kretprobe_blacklist[] = {{NULL, NULL}};
+
+int __kprobes arch_prepare_kprobe(struct kprobe *p)
+{
+ int ret = 0;
+
+ if ((unsigned long)p->addr & 0x01) {
+ printk("Attempt to register kprobe at an unaligned address\n");
+ ret = -EINVAL;
+ }
+
+ /* XXX: Might be a good idea to check if p->addr is a valid
+ * kernel address as well... */
+
+ if (!ret) {
+ pr_debug("copy kprobe at %p\n", p->addr);
+ memcpy(p->ainsn.insn, p->addr, MAX_INSN_SIZE * sizeof(kprobe_opcode_t));
+ p->opcode = *p->addr;
+ }
+
+ return ret;
+}
+
+void __kprobes arch_arm_kprobe(struct kprobe *p)
+{
+ pr_debug("arming kprobe at %p\n", p->addr);
+ ocd_enable(NULL);
+ *p->addr = BREAKPOINT_INSTRUCTION;
+ flush_icache_range((unsigned long)p->addr,
+ (unsigned long)p->addr + sizeof(kprobe_opcode_t));
+}
+
+void __kprobes arch_disarm_kprobe(struct kprobe *p)
+{
+ pr_debug("disarming kprobe at %p\n", p->addr);
+ ocd_disable(NULL);
+ *p->addr = p->opcode;
+ flush_icache_range((unsigned long)p->addr,
+ (unsigned long)p->addr + sizeof(kprobe_opcode_t));
+}
+
+static void __kprobes prepare_singlestep(struct kprobe *p, struct pt_regs *regs)
+{
+ unsigned long dc;
+
+ pr_debug("preparing to singlestep over %p (PC=%08lx)\n",
+ p->addr, regs->pc);
+
+ BUG_ON(!(sysreg_read(SR) & SYSREG_BIT(SR_D)));
+
+ dc = ocd_read(DC);
+ dc |= 1 << OCD_DC_SS_BIT;
+ ocd_write(DC, dc);
+
+ /*
+ * We must run the instruction from its original location
+ * since it may actually reference PC.
+ *
+ * TODO: Do the instruction replacement directly in icache.
+ */
+ *p->addr = p->opcode;
+ flush_icache_range((unsigned long)p->addr,
+ (unsigned long)p->addr + sizeof(kprobe_opcode_t));
+}
+
+static void __kprobes resume_execution(struct kprobe *p, struct pt_regs *regs)
+{
+ unsigned long dc;
+
+ pr_debug("resuming execution at PC=%08lx\n", regs->pc);
+
+ dc = ocd_read(DC);
+ dc &= ~(1 << OCD_DC_SS_BIT);
+ ocd_write(DC, dc);
+
+ *p->addr = BREAKPOINT_INSTRUCTION;
+ flush_icache_range((unsigned long)p->addr,
+ (unsigned long)p->addr + sizeof(kprobe_opcode_t));
+}
+
+static void __kprobes set_current_kprobe(struct kprobe *p)
+{
+ __this_cpu_write(current_kprobe, p);
+}
+
+static int __kprobes kprobe_handler(struct pt_regs *regs)
+{
+ struct kprobe *p;
+ void *addr = (void *)regs->pc;
+ int ret = 0;
+
+ pr_debug("kprobe_handler: kprobe_running=%p\n",
+ kprobe_running());
+
+ /*
+ * We don't want to be preempted for the entire
+ * duration of kprobe processing
+ */
+ preempt_disable();
+
+ /* Check that we're not recursing */
+ if (kprobe_running()) {
+ p = get_kprobe(addr);
+ if (p) {
+ if (kprobe_status == KPROBE_HIT_SS) {
+ printk("FIXME: kprobe hit while single-stepping!\n");
+ goto no_kprobe;
+ }
+
+ printk("FIXME: kprobe hit while handling another kprobe\n");
+ goto no_kprobe;
+ } else {
+ p = kprobe_running();
+ if (p->break_handler && p->break_handler(p, regs))
+ goto ss_probe;
+ }
+ /* If it's not ours, can't be delete race, (we hold lock). */
+ goto no_kprobe;
+ }
+
+ p = get_kprobe(addr);
+ if (!p)
+ goto no_kprobe;
+
+ kprobe_status = KPROBE_HIT_ACTIVE;
+ set_current_kprobe(p);
+ if (p->pre_handler && p->pre_handler(p, regs))
+ /* handler has already set things up, so skip ss setup */
+ return 1;
+
+ss_probe:
+ prepare_singlestep(p, regs);
+ kprobe_status = KPROBE_HIT_SS;
+ return 1;
+
+no_kprobe:
+ preempt_enable_no_resched();
+ return ret;
+}
+
+static int __kprobes post_kprobe_handler(struct pt_regs *regs)
+{
+ struct kprobe *cur = kprobe_running();
+
+ pr_debug("post_kprobe_handler, cur=%p\n", cur);
+
+ if (!cur)
+ return 0;
+
+ if (cur->post_handler) {
+ kprobe_status = KPROBE_HIT_SSDONE;
+ cur->post_handler(cur, regs, 0);
+ }
+
+ resume_execution(cur, regs);
+ reset_current_kprobe();
+ preempt_enable_no_resched();
+
+ return 1;
+}
+
+int __kprobes kprobe_fault_handler(struct pt_regs *regs, int trapnr)
+{
+ struct kprobe *cur = kprobe_running();
+
+ pr_debug("kprobe_fault_handler: trapnr=%d\n", trapnr);
+
+ if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr))
+ return 1;
+
+ if (kprobe_status & KPROBE_HIT_SS) {
+ resume_execution(cur, regs);
+ preempt_enable_no_resched();
+ }
+ return 0;
+}
+
+/*
+ * Wrapper routine to for handling exceptions.
+ */
+int __kprobes kprobe_exceptions_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct die_args *args = (struct die_args *)data;
+ int ret = NOTIFY_DONE;
+
+ pr_debug("kprobe_exceptions_notify: val=%lu, data=%p\n",
+ val, data);
+
+ switch (val) {
+ case DIE_BREAKPOINT:
+ if (kprobe_handler(args->regs))
+ ret = NOTIFY_STOP;
+ break;
+ case DIE_SSTEP:
+ if (post_kprobe_handler(args->regs))
+ ret = NOTIFY_STOP;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
+{
+ struct jprobe *jp = container_of(p, struct jprobe, kp);
+
+ memcpy(&jprobe_saved_regs, regs, sizeof(struct pt_regs));
+
+ /*
+ * TODO: We should probably save some of the stack here as
+ * well, since gcc may pass arguments on the stack for certain
+ * functions (lots of arguments, large aggregates, varargs)
+ */
+
+ /* setup return addr to the jprobe handler routine */
+ regs->pc = (unsigned long)jp->entry;
+ return 1;
+}
+
+void __kprobes jprobe_return(void)
+{
+ asm volatile("breakpoint" ::: "memory");
+}
+
+int __kprobes longjmp_break_handler(struct kprobe *p, struct pt_regs *regs)
+{
+ /*
+ * FIXME - we should ideally be validating that we got here 'cos
+ * of the "trap" in jprobe_return() above, before restoring the
+ * saved regs...
+ */
+ memcpy(regs, &jprobe_saved_regs, sizeof(struct pt_regs));
+ return 1;
+}
+
+int __init arch_init_kprobes(void)
+{
+ /* TODO: Register kretprobe trampoline */
+ return 0;
+}
diff --git a/arch/avr32/kernel/module.c b/arch/avr32/kernel/module.c
new file mode 100644
index 000000000..164efa009
--- /dev/null
+++ b/arch/avr32/kernel/module.c
@@ -0,0 +1,291 @@
+/*
+ * AVR32-specific kernel module loader
+ *
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * GOT initialization parts are based on the s390 version
+ * Copyright (C) 2002, 2003 IBM Deutschland Entwicklung GmbH,
+ * IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bug.h>
+#include <linux/elf.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleloader.h>
+#include <linux/vmalloc.h>
+
+void module_arch_freeing_init(struct module *mod)
+{
+ vfree(mod->arch.syminfo);
+ mod->arch.syminfo = NULL;
+}
+
+static inline int check_rela(Elf32_Rela *rela, struct module *module,
+ char *strings, Elf32_Sym *symbols)
+{
+ struct mod_arch_syminfo *info;
+
+ info = module->arch.syminfo + ELF32_R_SYM(rela->r_info);
+ switch (ELF32_R_TYPE(rela->r_info)) {
+ case R_AVR32_GOT32:
+ case R_AVR32_GOT16:
+ case R_AVR32_GOT8:
+ case R_AVR32_GOT21S:
+ case R_AVR32_GOT18SW: /* mcall */
+ case R_AVR32_GOT16S: /* ld.w */
+ if (rela->r_addend != 0) {
+ printk(KERN_ERR
+ "GOT relocation against %s at offset %u with addend\n",
+ strings + symbols[ELF32_R_SYM(rela->r_info)].st_name,
+ rela->r_offset);
+ return -ENOEXEC;
+ }
+ if (info->got_offset == -1UL) {
+ info->got_offset = module->arch.got_size;
+ module->arch.got_size += sizeof(void *);
+ }
+ pr_debug("GOT[%3lu] %s\n", info->got_offset,
+ strings + symbols[ELF32_R_SYM(rela->r_info)].st_name);
+ break;
+ }
+
+ return 0;
+}
+
+int module_frob_arch_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
+ char *secstrings, struct module *module)
+{
+ Elf32_Shdr *symtab;
+ Elf32_Sym *symbols;
+ Elf32_Rela *rela;
+ char *strings;
+ int nrela, i, j;
+ int ret;
+
+ /* Find the symbol table */
+ symtab = NULL;
+ for (i = 0; i < hdr->e_shnum; i++)
+ switch (sechdrs[i].sh_type) {
+ case SHT_SYMTAB:
+ symtab = &sechdrs[i];
+ break;
+ }
+ if (!symtab) {
+ printk(KERN_ERR "module %s: no symbol table\n", module->name);
+ return -ENOEXEC;
+ }
+
+ /* Allocate room for one syminfo structure per symbol. */
+ module->arch.nsyms = symtab->sh_size / sizeof(Elf_Sym);
+ module->arch.syminfo = vmalloc(module->arch.nsyms
+ * sizeof(struct mod_arch_syminfo));
+ if (!module->arch.syminfo)
+ return -ENOMEM;
+
+ symbols = (void *)hdr + symtab->sh_offset;
+ strings = (void *)hdr + sechdrs[symtab->sh_link].sh_offset;
+ for (i = 0; i < module->arch.nsyms; i++) {
+ if (symbols[i].st_shndx == SHN_UNDEF &&
+ strcmp(strings + symbols[i].st_name,
+ "_GLOBAL_OFFSET_TABLE_") == 0)
+ /* "Define" it as absolute. */
+ symbols[i].st_shndx = SHN_ABS;
+ module->arch.syminfo[i].got_offset = -1UL;
+ module->arch.syminfo[i].got_initialized = 0;
+ }
+
+ /* Allocate GOT entries for symbols that need it. */
+ module->arch.got_size = 0;
+ for (i = 0; i < hdr->e_shnum; i++) {
+ if (sechdrs[i].sh_type != SHT_RELA)
+ continue;
+ nrela = sechdrs[i].sh_size / sizeof(Elf32_Rela);
+ rela = (void *)hdr + sechdrs[i].sh_offset;
+ for (j = 0; j < nrela; j++) {
+ ret = check_rela(rela + j, module,
+ strings, symbols);
+ if (ret)
+ goto out_free_syminfo;
+ }
+ }
+
+ /*
+ * Increase core size to make room for GOT and set start
+ * offset for GOT.
+ */
+ module->core_size = ALIGN(module->core_size, 4);
+ module->arch.got_offset = module->core_size;
+ module->core_size += module->arch.got_size;
+
+ return 0;
+
+out_free_syminfo:
+ vfree(module->arch.syminfo);
+ module->arch.syminfo = NULL;
+
+ return ret;
+}
+
+static inline int reloc_overflow(struct module *module, const char *reloc_name,
+ Elf32_Addr relocation)
+{
+ printk(KERN_ERR "module %s: Value %lx does not fit relocation %s\n",
+ module->name, (unsigned long)relocation, reloc_name);
+ return -ENOEXEC;
+}
+
+#define get_u16(loc) (*((uint16_t *)loc))
+#define put_u16(loc, val) (*((uint16_t *)loc) = (val))
+
+int apply_relocate_add(Elf32_Shdr *sechdrs, const char *strtab,
+ unsigned int symindex, unsigned int relindex,
+ struct module *module)
+{
+ Elf32_Shdr *symsec = sechdrs + symindex;
+ Elf32_Shdr *relsec = sechdrs + relindex;
+ Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
+ Elf32_Rela *rel = (void *)relsec->sh_addr;
+ unsigned int i;
+ int ret = 0;
+
+ for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) {
+ struct mod_arch_syminfo *info;
+ Elf32_Sym *sym;
+ Elf32_Addr relocation;
+ uint32_t *location;
+ uint32_t value;
+
+ location = (void *)dstsec->sh_addr + rel->r_offset;
+ sym = (Elf32_Sym *)symsec->sh_addr + ELF32_R_SYM(rel->r_info);
+ relocation = sym->st_value + rel->r_addend;
+
+ info = module->arch.syminfo + ELF32_R_SYM(rel->r_info);
+
+ /* Initialize GOT entry if necessary */
+ switch (ELF32_R_TYPE(rel->r_info)) {
+ case R_AVR32_GOT32:
+ case R_AVR32_GOT16:
+ case R_AVR32_GOT8:
+ case R_AVR32_GOT21S:
+ case R_AVR32_GOT18SW:
+ case R_AVR32_GOT16S:
+ if (!info->got_initialized) {
+ Elf32_Addr *gotent;
+
+ gotent = (module->module_core
+ + module->arch.got_offset
+ + info->got_offset);
+ *gotent = relocation;
+ info->got_initialized = 1;
+ }
+
+ relocation = info->got_offset;
+ break;
+ }
+
+ switch (ELF32_R_TYPE(rel->r_info)) {
+ case R_AVR32_32:
+ case R_AVR32_32_CPENT:
+ *location = relocation;
+ break;
+ case R_AVR32_22H_PCREL:
+ relocation -= (Elf32_Addr)location;
+ if ((relocation & 0xffe00001) != 0
+ && (relocation & 0xffc00001) != 0xffc00000)
+ return reloc_overflow(module,
+ "R_AVR32_22H_PCREL",
+ relocation);
+ relocation >>= 1;
+
+ value = *location;
+ value = ((value & 0xe1ef0000)
+ | (relocation & 0xffff)
+ | ((relocation & 0x10000) << 4)
+ | ((relocation & 0x1e0000) << 8));
+ *location = value;
+ break;
+ case R_AVR32_11H_PCREL:
+ relocation -= (Elf32_Addr)location;
+ if ((relocation & 0xfffffc01) != 0
+ && (relocation & 0xfffff801) != 0xfffff800)
+ return reloc_overflow(module,
+ "R_AVR32_11H_PCREL",
+ relocation);
+ value = get_u16(location);
+ value = ((value & 0xf00c)
+ | ((relocation & 0x1fe) << 3)
+ | ((relocation & 0x600) >> 9));
+ put_u16(location, value);
+ break;
+ case R_AVR32_9H_PCREL:
+ relocation -= (Elf32_Addr)location;
+ if ((relocation & 0xffffff01) != 0
+ && (relocation & 0xfffffe01) != 0xfffffe00)
+ return reloc_overflow(module,
+ "R_AVR32_9H_PCREL",
+ relocation);
+ value = get_u16(location);
+ value = ((value & 0xf00f)
+ | ((relocation & 0x1fe) << 3));
+ put_u16(location, value);
+ break;
+ case R_AVR32_9UW_PCREL:
+ relocation -= ((Elf32_Addr)location) & 0xfffffffc;
+ if ((relocation & 0xfffffc03) != 0)
+ return reloc_overflow(module,
+ "R_AVR32_9UW_PCREL",
+ relocation);
+ value = get_u16(location);
+ value = ((value & 0xf80f)
+ | ((relocation & 0x1fc) << 2));
+ put_u16(location, value);
+ break;
+ case R_AVR32_GOTPC:
+ /*
+ * R6 = PC - (PC - GOT)
+ *
+ * At this point, relocation contains the
+ * value of PC. Just subtract the value of
+ * GOT, and we're done.
+ */
+ pr_debug("GOTPC: PC=0x%x, got_offset=0x%lx, core=0x%p\n",
+ relocation, module->arch.got_offset,
+ module->module_core);
+ relocation -= ((unsigned long)module->module_core
+ + module->arch.got_offset);
+ *location = relocation;
+ break;
+ case R_AVR32_GOT18SW:
+ if ((relocation & 0xfffe0003) != 0
+ && (relocation & 0xfffc0000) != 0xfffc0000)
+ return reloc_overflow(module, "R_AVR32_GOT18SW",
+ relocation);
+ relocation >>= 2;
+ /* fall through */
+ case R_AVR32_GOT16S:
+ if ((relocation & 0xffff8000) != 0
+ && (relocation & 0xffff0000) != 0xffff0000)
+ return reloc_overflow(module, "R_AVR32_GOT16S",
+ relocation);
+ pr_debug("GOT reloc @ 0x%x -> %u\n",
+ rel->r_offset, relocation);
+ value = *location;
+ value = ((value & 0xffff0000)
+ | (relocation & 0xffff));
+ *location = value;
+ break;
+
+ default:
+ printk(KERN_ERR "module %s: Unknown relocation: %u\n",
+ module->name, ELF32_R_TYPE(rel->r_info));
+ return -ENOEXEC;
+ }
+ }
+
+ return ret;
+}
diff --git a/arch/avr32/kernel/nmi_debug.c b/arch/avr32/kernel/nmi_debug.c
new file mode 100644
index 000000000..3414b8566
--- /dev/null
+++ b/arch/avr32/kernel/nmi_debug.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/delay.h>
+#include <linux/kdebug.h>
+#include <linux/notifier.h>
+#include <linux/sched.h>
+
+#include <asm/irq.h>
+
+enum nmi_action {
+ NMI_SHOW_STATE = 1 << 0,
+ NMI_SHOW_REGS = 1 << 1,
+ NMI_DIE = 1 << 2,
+ NMI_DEBOUNCE = 1 << 3,
+};
+
+static unsigned long nmi_actions;
+
+static int nmi_debug_notify(struct notifier_block *self,
+ unsigned long val, void *data)
+{
+ struct die_args *args = data;
+
+ if (likely(val != DIE_NMI))
+ return NOTIFY_DONE;
+
+ if (nmi_actions & NMI_SHOW_STATE)
+ show_state();
+ if (nmi_actions & NMI_SHOW_REGS)
+ show_regs(args->regs);
+ if (nmi_actions & NMI_DEBOUNCE)
+ mdelay(10);
+ if (nmi_actions & NMI_DIE)
+ return NOTIFY_BAD;
+
+ return NOTIFY_OK;
+}
+
+static struct notifier_block nmi_debug_nb = {
+ .notifier_call = nmi_debug_notify,
+};
+
+static int __init nmi_debug_setup(char *str)
+{
+ char *p, *sep;
+
+ register_die_notifier(&nmi_debug_nb);
+ if (nmi_enable()) {
+ printk(KERN_WARNING "Unable to enable NMI.\n");
+ return 0;
+ }
+
+ if (*str != '=')
+ return 0;
+
+ for (p = str + 1; *p; p = sep + 1) {
+ sep = strchr(p, ',');
+ if (sep)
+ *sep = 0;
+ if (strcmp(p, "state") == 0)
+ nmi_actions |= NMI_SHOW_STATE;
+ else if (strcmp(p, "regs") == 0)
+ nmi_actions |= NMI_SHOW_REGS;
+ else if (strcmp(p, "debounce") == 0)
+ nmi_actions |= NMI_DEBOUNCE;
+ else if (strcmp(p, "die") == 0)
+ nmi_actions |= NMI_DIE;
+ else
+ printk(KERN_WARNING "NMI: Unrecognized action `%s'\n",
+ p);
+ if (!sep)
+ break;
+ }
+
+ return 0;
+}
+__setup("nmi_debug", nmi_debug_setup);
diff --git a/arch/avr32/kernel/ocd.c b/arch/avr32/kernel/ocd.c
new file mode 100644
index 000000000..1b0245d4e
--- /dev/null
+++ b/arch/avr32/kernel/ocd.c
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+
+#include <asm/ocd.h>
+
+static long ocd_count;
+static spinlock_t ocd_lock;
+
+/**
+ * ocd_enable - enable on-chip debugging
+ * @child: task to be debugged
+ *
+ * If @child is non-NULL, ocd_enable() first checks if debugging has
+ * already been enabled for @child, and if it has, does nothing.
+ *
+ * If @child is NULL (e.g. when debugging the kernel), or debugging
+ * has not already been enabled for it, ocd_enable() increments the
+ * reference count and enables the debugging hardware.
+ */
+void ocd_enable(struct task_struct *child)
+{
+ u32 dc;
+
+ if (child)
+ pr_debug("ocd_enable: child=%s [%u]\n",
+ child->comm, child->pid);
+ else
+ pr_debug("ocd_enable (no child)\n");
+
+ if (!child || !test_and_set_tsk_thread_flag(child, TIF_DEBUG)) {
+ spin_lock(&ocd_lock);
+ ocd_count++;
+ dc = ocd_read(DC);
+ dc |= (1 << OCD_DC_MM_BIT) | (1 << OCD_DC_DBE_BIT);
+ ocd_write(DC, dc);
+ spin_unlock(&ocd_lock);
+ }
+}
+
+/**
+ * ocd_disable - disable on-chip debugging
+ * @child: task that was being debugged, but isn't anymore
+ *
+ * If @child is non-NULL, ocd_disable() checks if debugging is enabled
+ * for @child, and if it isn't, does nothing.
+ *
+ * If @child is NULL (e.g. when debugging the kernel), or debugging is
+ * enabled, ocd_disable() decrements the reference count, and if it
+ * reaches zero, disables the debugging hardware.
+ */
+void ocd_disable(struct task_struct *child)
+{
+ u32 dc;
+
+ if (!child)
+ pr_debug("ocd_disable (no child)\n");
+ else if (test_tsk_thread_flag(child, TIF_DEBUG))
+ pr_debug("ocd_disable: child=%s [%u]\n",
+ child->comm, child->pid);
+
+ if (!child || test_and_clear_tsk_thread_flag(child, TIF_DEBUG)) {
+ spin_lock(&ocd_lock);
+ ocd_count--;
+
+ WARN_ON(ocd_count < 0);
+
+ if (ocd_count <= 0) {
+ dc = ocd_read(DC);
+ dc &= ~((1 << OCD_DC_MM_BIT) | (1 << OCD_DC_DBE_BIT));
+ ocd_write(DC, dc);
+ }
+ spin_unlock(&ocd_lock);
+ }
+}
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#include <linux/module.h>
+
+static struct dentry *ocd_debugfs_root;
+static struct dentry *ocd_debugfs_DC;
+static struct dentry *ocd_debugfs_DS;
+static struct dentry *ocd_debugfs_count;
+
+static int ocd_DC_get(void *data, u64 *val)
+{
+ *val = ocd_read(DC);
+ return 0;
+}
+static int ocd_DC_set(void *data, u64 val)
+{
+ ocd_write(DC, val);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_DC, ocd_DC_get, ocd_DC_set, "0x%08llx\n");
+
+static int ocd_DS_get(void *data, u64 *val)
+{
+ *val = ocd_read(DS);
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_DS, ocd_DS_get, NULL, "0x%08llx\n");
+
+static int ocd_count_get(void *data, u64 *val)
+{
+ *val = ocd_count;
+ return 0;
+}
+DEFINE_SIMPLE_ATTRIBUTE(fops_count, ocd_count_get, NULL, "%lld\n");
+
+static void ocd_debugfs_init(void)
+{
+ struct dentry *root;
+
+ root = debugfs_create_dir("ocd", NULL);
+ if (IS_ERR(root) || !root)
+ goto err_root;
+ ocd_debugfs_root = root;
+
+ ocd_debugfs_DC = debugfs_create_file("DC", S_IRUSR | S_IWUSR,
+ root, NULL, &fops_DC);
+ if (!ocd_debugfs_DC)
+ goto err_DC;
+
+ ocd_debugfs_DS = debugfs_create_file("DS", S_IRUSR, root,
+ NULL, &fops_DS);
+ if (!ocd_debugfs_DS)
+ goto err_DS;
+
+ ocd_debugfs_count = debugfs_create_file("count", S_IRUSR, root,
+ NULL, &fops_count);
+ if (!ocd_debugfs_count)
+ goto err_count;
+
+ return;
+
+err_count:
+ debugfs_remove(ocd_debugfs_DS);
+err_DS:
+ debugfs_remove(ocd_debugfs_DC);
+err_DC:
+ debugfs_remove(ocd_debugfs_root);
+err_root:
+ printk(KERN_WARNING "OCD: Failed to create debugfs entries\n");
+}
+#else
+static inline void ocd_debugfs_init(void)
+{
+
+}
+#endif
+
+static int __init ocd_init(void)
+{
+ spin_lock_init(&ocd_lock);
+ ocd_debugfs_init();
+ return 0;
+}
+arch_initcall(ocd_init);
diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
new file mode 100644
index 000000000..42a53e740
--- /dev/null
+++ b/arch/avr32/kernel/process.c
@@ -0,0 +1,355 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/kallsyms.h>
+#include <linux/fs.h>
+#include <linux/pm.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/reboot.h>
+#include <linux/tick.h>
+#include <linux/uaccess.h>
+#include <linux/unistd.h>
+
+#include <asm/sysreg.h>
+#include <asm/ocd.h>
+#include <asm/syscalls.h>
+
+#include <mach/pm.h>
+
+void (*pm_power_off)(void);
+EXPORT_SYMBOL(pm_power_off);
+
+/*
+ * This file handles the architecture-dependent parts of process handling..
+ */
+
+void arch_cpu_idle(void)
+{
+ cpu_enter_idle();
+}
+
+void machine_halt(void)
+{
+ /*
+ * Enter Stop mode. The 32 kHz oscillator will keep running so
+ * the RTC will keep the time properly and the system will
+ * boot quickly.
+ */
+ asm volatile("sleep 3\n\t"
+ "sub pc, -2");
+}
+
+void machine_power_off(void)
+{
+ if (pm_power_off)
+ pm_power_off();
+}
+
+void machine_restart(char *cmd)
+{
+ ocd_write(DC, (1 << OCD_DC_DBE_BIT));
+ ocd_write(DC, (1 << OCD_DC_RES_BIT));
+ while (1) ;
+}
+
+/*
+ * Free current thread data structures etc
+ */
+void exit_thread(void)
+{
+ ocd_disable(current);
+}
+
+void flush_thread(void)
+{
+ /* nothing to do */
+}
+
+void release_thread(struct task_struct *dead_task)
+{
+ /* do nothing */
+}
+
+static void dump_mem(const char *str, const char *log_lvl,
+ unsigned long bottom, unsigned long top)
+{
+ unsigned long p;
+ int i;
+
+ printk("%s%s(0x%08lx to 0x%08lx)\n", log_lvl, str, bottom, top);
+
+ for (p = bottom & ~31; p < top; ) {
+ printk("%s%04lx: ", log_lvl, p & 0xffff);
+
+ for (i = 0; i < 8; i++, p += 4) {
+ unsigned int val;
+
+ if (p < bottom || p >= top)
+ printk(" ");
+ else {
+ if (__get_user(val, (unsigned int __user *)p)) {
+ printk("\n");
+ goto out;
+ }
+ printk("%08x ", val);
+ }
+ }
+ printk("\n");
+ }
+
+out:
+ return;
+}
+
+static inline int valid_stack_ptr(struct thread_info *tinfo, unsigned long p)
+{
+ return (p > (unsigned long)tinfo)
+ && (p < (unsigned long)tinfo + THREAD_SIZE - 3);
+}
+
+#ifdef CONFIG_FRAME_POINTER
+static void show_trace_log_lvl(struct task_struct *tsk, unsigned long *sp,
+ struct pt_regs *regs, const char *log_lvl)
+{
+ unsigned long lr, fp;
+ struct thread_info *tinfo;
+
+ if (regs)
+ fp = regs->r7;
+ else if (tsk == current)
+ asm("mov %0, r7" : "=r"(fp));
+ else
+ fp = tsk->thread.cpu_context.r7;
+
+ /*
+ * Walk the stack as long as the frame pointer (a) is within
+ * the kernel stack of the task, and (b) it doesn't move
+ * downwards.
+ */
+ tinfo = task_thread_info(tsk);
+ printk("%sCall trace:\n", log_lvl);
+ while (valid_stack_ptr(tinfo, fp)) {
+ unsigned long new_fp;
+
+ lr = *(unsigned long *)fp;
+#ifdef CONFIG_KALLSYMS
+ printk("%s [<%08lx>] ", log_lvl, lr);
+#else
+ printk(" [<%08lx>] ", lr);
+#endif
+ print_symbol("%s\n", lr);
+
+ new_fp = *(unsigned long *)(fp + 4);
+ if (new_fp <= fp)
+ break;
+ fp = new_fp;
+ }
+ printk("\n");
+}
+#else
+static void show_trace_log_lvl(struct task_struct *tsk, unsigned long *sp,
+ struct pt_regs *regs, const char *log_lvl)
+{
+ unsigned long addr;
+
+ printk("%sCall trace:\n", log_lvl);
+
+ while (!kstack_end(sp)) {
+ addr = *sp++;
+ if (kernel_text_address(addr)) {
+#ifdef CONFIG_KALLSYMS
+ printk("%s [<%08lx>] ", log_lvl, addr);
+#else
+ printk(" [<%08lx>] ", addr);
+#endif
+ print_symbol("%s\n", addr);
+ }
+ }
+ printk("\n");
+}
+#endif
+
+void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
+ struct pt_regs *regs, const char *log_lvl)
+{
+ struct thread_info *tinfo;
+
+ if (sp == 0) {
+ if (tsk)
+ sp = tsk->thread.cpu_context.ksp;
+ else
+ sp = (unsigned long)&tinfo;
+ }
+ if (!tsk)
+ tsk = current;
+
+ tinfo = task_thread_info(tsk);
+
+ if (valid_stack_ptr(tinfo, sp)) {
+ dump_mem("Stack: ", log_lvl, sp,
+ THREAD_SIZE + (unsigned long)tinfo);
+ show_trace_log_lvl(tsk, (unsigned long *)sp, regs, log_lvl);
+ }
+}
+
+void show_stack(struct task_struct *tsk, unsigned long *stack)
+{
+ show_stack_log_lvl(tsk, (unsigned long)stack, NULL, "");
+}
+
+static const char *cpu_modes[] = {
+ "Application", "Supervisor", "Interrupt level 0", "Interrupt level 1",
+ "Interrupt level 2", "Interrupt level 3", "Exception", "NMI"
+};
+
+void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl)
+{
+ unsigned long sp = regs->sp;
+ unsigned long lr = regs->lr;
+ unsigned long mode = (regs->sr & MODE_MASK) >> MODE_SHIFT;
+
+ show_regs_print_info(log_lvl);
+
+ if (!user_mode(regs)) {
+ sp = (unsigned long)regs + FRAME_SIZE_FULL;
+
+ printk("%s", log_lvl);
+ print_symbol("PC is at %s\n", instruction_pointer(regs));
+ printk("%s", log_lvl);
+ print_symbol("LR is at %s\n", lr);
+ }
+
+ printk("%spc : [<%08lx>] lr : [<%08lx>] %s\n"
+ "%ssp : %08lx r12: %08lx r11: %08lx\n",
+ log_lvl, instruction_pointer(regs), lr, print_tainted(),
+ log_lvl, sp, regs->r12, regs->r11);
+ printk("%sr10: %08lx r9 : %08lx r8 : %08lx\n",
+ log_lvl, regs->r10, regs->r9, regs->r8);
+ printk("%sr7 : %08lx r6 : %08lx r5 : %08lx r4 : %08lx\n",
+ log_lvl, regs->r7, regs->r6, regs->r5, regs->r4);
+ printk("%sr3 : %08lx r2 : %08lx r1 : %08lx r0 : %08lx\n",
+ log_lvl, regs->r3, regs->r2, regs->r1, regs->r0);
+ printk("%sFlags: %c%c%c%c%c\n", log_lvl,
+ regs->sr & SR_Q ? 'Q' : 'q',
+ regs->sr & SR_V ? 'V' : 'v',
+ regs->sr & SR_N ? 'N' : 'n',
+ regs->sr & SR_Z ? 'Z' : 'z',
+ regs->sr & SR_C ? 'C' : 'c');
+ printk("%sMode bits: %c%c%c%c%c%c%c%c%c%c\n", log_lvl,
+ regs->sr & SR_H ? 'H' : 'h',
+ regs->sr & SR_J ? 'J' : 'j',
+ regs->sr & SR_DM ? 'M' : 'm',
+ regs->sr & SR_D ? 'D' : 'd',
+ regs->sr & SR_EM ? 'E' : 'e',
+ regs->sr & SR_I3M ? '3' : '.',
+ regs->sr & SR_I2M ? '2' : '.',
+ regs->sr & SR_I1M ? '1' : '.',
+ regs->sr & SR_I0M ? '0' : '.',
+ regs->sr & SR_GM ? 'G' : 'g');
+ printk("%sCPU Mode: %s\n", log_lvl, cpu_modes[mode]);
+}
+
+void show_regs(struct pt_regs *regs)
+{
+ unsigned long sp = regs->sp;
+
+ if (!user_mode(regs))
+ sp = (unsigned long)regs + FRAME_SIZE_FULL;
+
+ show_regs_log_lvl(regs, "");
+ show_trace_log_lvl(current, (unsigned long *)sp, regs, "");
+}
+EXPORT_SYMBOL(show_regs);
+
+/* Fill in the fpu structure for a core dump. This is easy -- we don't have any */
+int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpu)
+{
+ /* Not valid */
+ return 0;
+}
+
+asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
+asmlinkage void syscall_return(void);
+
+int copy_thread(unsigned long clone_flags, unsigned long usp,
+ unsigned long arg,
+ struct task_struct *p)
+{
+ struct pt_regs *childregs = task_pt_regs(p);
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(childregs, 0, sizeof(struct pt_regs));
+ p->thread.cpu_context.r0 = arg;
+ p->thread.cpu_context.r1 = usp; /* fn */
+ p->thread.cpu_context.r2 = (unsigned long)syscall_return;
+ p->thread.cpu_context.pc = (unsigned long)ret_from_kernel_thread;
+ childregs->sr = MODE_SUPERVISOR;
+ } else {
+ *childregs = *current_pt_regs();
+ if (usp)
+ childregs->sp = usp;
+ childregs->r12 = 0; /* Set return value for child */
+ p->thread.cpu_context.pc = (unsigned long)ret_from_fork;
+ }
+
+ p->thread.cpu_context.sr = MODE_SUPERVISOR | SR_GM;
+ p->thread.cpu_context.ksp = (unsigned long)childregs;
+
+ clear_tsk_thread_flag(p, TIF_DEBUG);
+ if ((clone_flags & CLONE_PTRACE) && test_thread_flag(TIF_DEBUG))
+ ocd_enable(p);
+
+ return 0;
+}
+
+/*
+ * This function is supposed to answer the question "who called
+ * schedule()?"
+ */
+unsigned long get_wchan(struct task_struct *p)
+{
+ unsigned long pc;
+ unsigned long stack_page;
+
+ if (!p || p == current || p->state == TASK_RUNNING)
+ return 0;
+
+ stack_page = (unsigned long)task_stack_page(p);
+ BUG_ON(!stack_page);
+
+ /*
+ * The stored value of PC is either the address right after
+ * the call to __switch_to() or ret_from_fork.
+ */
+ pc = thread_saved_pc(p);
+ if (in_sched_functions(pc)) {
+#ifdef CONFIG_FRAME_POINTER
+ unsigned long fp = p->thread.cpu_context.r7;
+ BUG_ON(fp < stack_page || fp > (THREAD_SIZE + stack_page));
+ pc = *(unsigned long *)fp;
+#else
+ /*
+ * We depend on the frame size of schedule here, which
+ * is actually quite ugly. It might be possible to
+ * determine the frame size automatically at build
+ * time by doing this:
+ * - compile sched/core.c
+ * - disassemble the resulting sched.o
+ * - look for 'sub sp,??' shortly after '<schedule>:'
+ */
+ unsigned long sp = p->thread.cpu_context.ksp + 16;
+ BUG_ON(sp < stack_page || sp > (THREAD_SIZE + stack_page));
+ pc = *(unsigned long *)sp;
+#endif
+ }
+
+ return pc;
+}
diff --git a/arch/avr32/kernel/ptrace.c b/arch/avr32/kernel/ptrace.c
new file mode 100644
index 000000000..4aedcab7c
--- /dev/null
+++ b/arch/avr32/kernel/ptrace.c
@@ -0,0 +1,356 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#undef DEBUG
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/user.h>
+#include <linux/security.h>
+#include <linux/unistd.h>
+#include <linux/notifier.h>
+
+#include <asm/traps.h>
+#include <asm/uaccess.h>
+#include <asm/ocd.h>
+#include <asm/mmu_context.h>
+#include <linux/kdebug.h>
+
+static struct pt_regs *get_user_regs(struct task_struct *tsk)
+{
+ return (struct pt_regs *)((unsigned long)task_stack_page(tsk) +
+ THREAD_SIZE - sizeof(struct pt_regs));
+}
+
+void user_enable_single_step(struct task_struct *tsk)
+{
+ pr_debug("user_enable_single_step: pid=%u, PC=0x%08lx, SR=0x%08lx\n",
+ tsk->pid, task_pt_regs(tsk)->pc, task_pt_regs(tsk)->sr);
+
+ /*
+ * We can't schedule in Debug mode, so when TIF_BREAKPOINT is
+ * set, the system call or exception handler will do a
+ * breakpoint to enter monitor mode before returning to
+ * userspace.
+ *
+ * The monitor code will then notice that TIF_SINGLE_STEP is
+ * set and return to userspace with single stepping enabled.
+ * The CPU will then enter monitor mode again after exactly
+ * one instruction has been executed, and the monitor code
+ * will then send a SIGTRAP to the process.
+ */
+ set_tsk_thread_flag(tsk, TIF_BREAKPOINT);
+ set_tsk_thread_flag(tsk, TIF_SINGLE_STEP);
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ /* XXX(hch): a no-op here seems wrong.. */
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching
+ *
+ * Make sure any single step bits, etc. are not set
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ clear_tsk_thread_flag(child, TIF_SINGLE_STEP);
+ clear_tsk_thread_flag(child, TIF_BREAKPOINT);
+ ocd_disable(child);
+}
+
+/*
+ * Read the word at offset "offset" into the task's "struct user". We
+ * actually access the pt_regs struct stored on the kernel stack.
+ */
+static int ptrace_read_user(struct task_struct *tsk, unsigned long offset,
+ unsigned long __user *data)
+{
+ unsigned long *regs;
+ unsigned long value;
+
+ if (offset & 3 || offset >= sizeof(struct user)) {
+ printk("ptrace_read_user: invalid offset 0x%08lx\n", offset);
+ return -EIO;
+ }
+
+ regs = (unsigned long *)get_user_regs(tsk);
+
+ value = 0;
+ if (offset < sizeof(struct pt_regs))
+ value = regs[offset / sizeof(regs[0])];
+
+ pr_debug("ptrace_read_user(%s[%u], %#lx, %p) -> %#lx\n",
+ tsk->comm, tsk->pid, offset, data, value);
+
+ return put_user(value, data);
+}
+
+/*
+ * Write the word "value" to offset "offset" into the task's "struct
+ * user". We actually access the pt_regs struct stored on the kernel
+ * stack.
+ */
+static int ptrace_write_user(struct task_struct *tsk, unsigned long offset,
+ unsigned long value)
+{
+ unsigned long *regs;
+
+ pr_debug("ptrace_write_user(%s[%u], %#lx, %#lx)\n",
+ tsk->comm, tsk->pid, offset, value);
+
+ if (offset & 3 || offset >= sizeof(struct user)) {
+ pr_debug(" invalid offset 0x%08lx\n", offset);
+ return -EIO;
+ }
+
+ if (offset >= sizeof(struct pt_regs))
+ return 0;
+
+ regs = (unsigned long *)get_user_regs(tsk);
+ regs[offset / sizeof(regs[0])] = value;
+
+ return 0;
+}
+
+static int ptrace_getregs(struct task_struct *tsk, void __user *uregs)
+{
+ struct pt_regs *regs = get_user_regs(tsk);
+
+ return copy_to_user(uregs, regs, sizeof(*regs)) ? -EFAULT : 0;
+}
+
+static int ptrace_setregs(struct task_struct *tsk, const void __user *uregs)
+{
+ struct pt_regs newregs;
+ int ret;
+
+ ret = -EFAULT;
+ if (copy_from_user(&newregs, uregs, sizeof(newregs)) == 0) {
+ struct pt_regs *regs = get_user_regs(tsk);
+
+ ret = -EINVAL;
+ if (valid_user_regs(&newregs)) {
+ *regs = newregs;
+ ret = 0;
+ }
+ }
+
+ return ret;
+}
+
+long arch_ptrace(struct task_struct *child, long request,
+ unsigned long addr, unsigned long data)
+{
+ int ret;
+ void __user *datap = (void __user *) data;
+
+ switch (request) {
+ /* Read the word at location addr in the child process */
+ case PTRACE_PEEKTEXT:
+ case PTRACE_PEEKDATA:
+ ret = generic_ptrace_peekdata(child, addr, data);
+ break;
+
+ case PTRACE_PEEKUSR:
+ ret = ptrace_read_user(child, addr, datap);
+ break;
+
+ /* Write the word in data at location addr */
+ case PTRACE_POKETEXT:
+ case PTRACE_POKEDATA:
+ ret = generic_ptrace_pokedata(child, addr, data);
+ break;
+
+ case PTRACE_POKEUSR:
+ ret = ptrace_write_user(child, addr, data);
+ break;
+
+ case PTRACE_GETREGS:
+ ret = ptrace_getregs(child, datap);
+ break;
+
+ case PTRACE_SETREGS:
+ ret = ptrace_setregs(child, datap);
+ break;
+
+ default:
+ ret = ptrace_request(child, request, addr, data);
+ break;
+ }
+
+ return ret;
+}
+
+asmlinkage void syscall_trace(void)
+{
+ if (!test_thread_flag(TIF_SYSCALL_TRACE))
+ return;
+ if (!(current->ptrace & PT_PTRACED))
+ return;
+
+ /* The 0x80 provides a way for the tracing parent to
+ * distinguish between a syscall stop and SIGTRAP delivery */
+ ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
+ ? 0x80 : 0));
+
+ /*
+ * this isn't the same as continuing with a signal, but it
+ * will do for normal use. strace only continues with a
+ * signal if the stopping signal is not SIGTRAP. -brl
+ */
+ if (current->exit_code) {
+ pr_debug("syscall_trace: sending signal %d to PID %u\n",
+ current->exit_code, current->pid);
+ send_sig(current->exit_code, current, 1);
+ current->exit_code = 0;
+ }
+}
+
+/*
+ * debug_trampoline() is an assembly stub which will store all user
+ * registers on the stack and execute a breakpoint instruction.
+ *
+ * If we single-step into an exception handler which runs with
+ * interrupts disabled the whole time so it doesn't have to check for
+ * pending work, its return address will be modified so that it ends
+ * up returning to debug_trampoline.
+ *
+ * If the exception handler decides to store the user context and
+ * enable interrupts after all, it will restore the original return
+ * address and status register value. Before it returns, it will
+ * notice that TIF_BREAKPOINT is set and execute a breakpoint
+ * instruction.
+ */
+extern void debug_trampoline(void);
+
+asmlinkage struct pt_regs *do_debug(struct pt_regs *regs)
+{
+ struct thread_info *ti;
+ unsigned long trampoline_addr;
+ u32 status;
+ u32 ctrl;
+ int code;
+
+ status = ocd_read(DS);
+ ti = current_thread_info();
+ code = TRAP_BRKPT;
+
+ pr_debug("do_debug: status=0x%08x PC=0x%08lx SR=0x%08lx tif=0x%08lx\n",
+ status, regs->pc, regs->sr, ti->flags);
+
+ if (!user_mode(regs)) {
+ unsigned long die_val = DIE_BREAKPOINT;
+
+ if (status & (1 << OCD_DS_SSS_BIT))
+ die_val = DIE_SSTEP;
+
+ if (notify_die(die_val, "ptrace", regs, 0, 0, SIGTRAP)
+ == NOTIFY_STOP)
+ return regs;
+
+ if ((status & (1 << OCD_DS_SWB_BIT))
+ && test_and_clear_ti_thread_flag(
+ ti, TIF_BREAKPOINT)) {
+ /*
+ * Explicit breakpoint from trampoline or
+ * exception/syscall/interrupt handler.
+ *
+ * The real saved regs are on the stack right
+ * after the ones we saved on entry.
+ */
+ regs++;
+ pr_debug(" -> TIF_BREAKPOINT done, adjusted regs:"
+ "PC=0x%08lx SR=0x%08lx\n",
+ regs->pc, regs->sr);
+ BUG_ON(!user_mode(regs));
+
+ if (test_thread_flag(TIF_SINGLE_STEP)) {
+ pr_debug("Going to do single step...\n");
+ return regs;
+ }
+
+ /*
+ * No TIF_SINGLE_STEP means we're done
+ * stepping over a syscall. Do the trap now.
+ */
+ code = TRAP_TRACE;
+ } else if ((status & (1 << OCD_DS_SSS_BIT))
+ && test_ti_thread_flag(ti, TIF_SINGLE_STEP)) {
+
+ pr_debug("Stepped into something, "
+ "setting TIF_BREAKPOINT...\n");
+ set_ti_thread_flag(ti, TIF_BREAKPOINT);
+
+ /*
+ * We stepped into an exception, interrupt or
+ * syscall handler. Some exception handlers
+ * don't check for pending work, so we need to
+ * set up a trampoline just in case.
+ *
+ * The exception entry code will undo the
+ * trampoline stuff if it does a full context
+ * save (which also means that it'll check for
+ * pending work later.)
+ */
+ if ((regs->sr & MODE_MASK) == MODE_EXCEPTION) {
+ trampoline_addr
+ = (unsigned long)&debug_trampoline;
+
+ pr_debug("Setting up trampoline...\n");
+ ti->rar_saved = sysreg_read(RAR_EX);
+ ti->rsr_saved = sysreg_read(RSR_EX);
+ sysreg_write(RAR_EX, trampoline_addr);
+ sysreg_write(RSR_EX, (MODE_EXCEPTION
+ | SR_EM | SR_GM));
+ BUG_ON(ti->rsr_saved & MODE_MASK);
+ }
+
+ /*
+ * If we stepped into a system call, we
+ * shouldn't do a single step after we return
+ * since the return address is right after the
+ * "scall" instruction we were told to step
+ * over.
+ */
+ if ((regs->sr & MODE_MASK) == MODE_SUPERVISOR) {
+ pr_debug("Supervisor; no single step\n");
+ clear_ti_thread_flag(ti, TIF_SINGLE_STEP);
+ }
+
+ ctrl = ocd_read(DC);
+ ctrl &= ~(1 << OCD_DC_SS_BIT);
+ ocd_write(DC, ctrl);
+
+ return regs;
+ } else {
+ printk(KERN_ERR "Unexpected OCD_DS value: 0x%08x\n",
+ status);
+ printk(KERN_ERR "Thread flags: 0x%08lx\n", ti->flags);
+ die("Unhandled debug trap in kernel mode",
+ regs, SIGTRAP);
+ }
+ } else if (status & (1 << OCD_DS_SSS_BIT)) {
+ /* Single step in user mode */
+ code = TRAP_TRACE;
+
+ ctrl = ocd_read(DC);
+ ctrl &= ~(1 << OCD_DC_SS_BIT);
+ ocd_write(DC, ctrl);
+ }
+
+ pr_debug("Sending SIGTRAP: code=%d PC=0x%08lx SR=0x%08lx\n",
+ code, regs->pc, regs->sr);
+
+ clear_thread_flag(TIF_SINGLE_STEP);
+ _exception(SIGTRAP, regs, code, instruction_pointer(regs));
+
+ return regs;
+}
diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c
new file mode 100644
index 000000000..209ae5ad3
--- /dev/null
+++ b/arch/avr32/kernel/setup.c
@@ -0,0 +1,609 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/sched.h>
+#include <linux/console.h>
+#include <linux/ioport.h>
+#include <linux/bootmem.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/pfn.h>
+#include <linux/root_dev.h>
+#include <linux/cpu.h>
+#include <linux/kernel.h>
+
+#include <asm/sections.h>
+#include <asm/processor.h>
+#include <asm/pgtable.h>
+#include <asm/setup.h>
+#include <asm/sysreg.h>
+
+#include <mach/board.h>
+#include <mach/init.h>
+
+extern int root_mountflags;
+
+/*
+ * Initialize loops_per_jiffy as 5000000 (500MIPS).
+ * Better make it too large than too small...
+ */
+struct avr32_cpuinfo boot_cpu_data = {
+ .loops_per_jiffy = 5000000
+};
+EXPORT_SYMBOL(boot_cpu_data);
+
+static char __initdata command_line[COMMAND_LINE_SIZE];
+
+/*
+ * Standard memory resources
+ */
+static struct resource __initdata kernel_data = {
+ .name = "Kernel data",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_MEM,
+};
+static struct resource __initdata kernel_code = {
+ .name = "Kernel code",
+ .start = 0,
+ .end = 0,
+ .flags = IORESOURCE_MEM,
+ .sibling = &kernel_data,
+};
+
+/*
+ * Available system RAM and reserved regions as singly linked
+ * lists. These lists are traversed using the sibling pointer in
+ * struct resource and are kept sorted at all times.
+ */
+static struct resource *__initdata system_ram;
+static struct resource *__initdata reserved = &kernel_code;
+
+/*
+ * We need to allocate these before the bootmem allocator is up and
+ * running, so we need this "cache". 32 entries are probably enough
+ * for all but the most insanely complex systems.
+ */
+static struct resource __initdata res_cache[32];
+static unsigned int __initdata res_cache_next_free;
+
+static void __init resource_init(void)
+{
+ struct resource *mem, *res;
+ struct resource *new;
+
+ kernel_code.start = __pa(init_mm.start_code);
+
+ for (mem = system_ram; mem; mem = mem->sibling) {
+ new = alloc_bootmem_low(sizeof(struct resource));
+ memcpy(new, mem, sizeof(struct resource));
+
+ new->sibling = NULL;
+ if (request_resource(&iomem_resource, new))
+ printk(KERN_WARNING "Bad RAM resource %08x-%08x\n",
+ mem->start, mem->end);
+ }
+
+ for (res = reserved; res; res = res->sibling) {
+ new = alloc_bootmem_low(sizeof(struct resource));
+ memcpy(new, res, sizeof(struct resource));
+
+ new->sibling = NULL;
+ if (insert_resource(&iomem_resource, new))
+ printk(KERN_WARNING
+ "Bad reserved resource %s (%08x-%08x)\n",
+ res->name, res->start, res->end);
+ }
+}
+
+static void __init
+add_physical_memory(resource_size_t start, resource_size_t end)
+{
+ struct resource *new, *next, **pprev;
+
+ for (pprev = &system_ram, next = system_ram; next;
+ pprev = &next->sibling, next = next->sibling) {
+ if (end < next->start)
+ break;
+ if (start <= next->end) {
+ printk(KERN_WARNING
+ "Warning: Physical memory map is broken\n");
+ printk(KERN_WARNING
+ "Warning: %08x-%08x overlaps %08x-%08x\n",
+ start, end, next->start, next->end);
+ return;
+ }
+ }
+
+ if (res_cache_next_free >= ARRAY_SIZE(res_cache)) {
+ printk(KERN_WARNING
+ "Warning: Failed to add physical memory %08x-%08x\n",
+ start, end);
+ return;
+ }
+
+ new = &res_cache[res_cache_next_free++];
+ new->start = start;
+ new->end = end;
+ new->name = "System RAM";
+ new->flags = IORESOURCE_MEM;
+
+ *pprev = new;
+}
+
+static int __init
+add_reserved_region(resource_size_t start, resource_size_t end,
+ const char *name)
+{
+ struct resource *new, *next, **pprev;
+
+ if (end < start)
+ return -EINVAL;
+
+ if (res_cache_next_free >= ARRAY_SIZE(res_cache))
+ return -ENOMEM;
+
+ for (pprev = &reserved, next = reserved; next;
+ pprev = &next->sibling, next = next->sibling) {
+ if (end < next->start)
+ break;
+ if (start <= next->end)
+ return -EBUSY;
+ }
+
+ new = &res_cache[res_cache_next_free++];
+ new->start = start;
+ new->end = end;
+ new->name = name;
+ new->sibling = next;
+ new->flags = IORESOURCE_MEM;
+
+ *pprev = new;
+
+ return 0;
+}
+
+static unsigned long __init
+find_free_region(const struct resource *mem, resource_size_t size,
+ resource_size_t align)
+{
+ struct resource *res;
+ unsigned long target;
+
+ target = ALIGN(mem->start, align);
+ for (res = reserved; res; res = res->sibling) {
+ if ((target + size) <= res->start)
+ break;
+ if (target <= res->end)
+ target = ALIGN(res->end + 1, align);
+ }
+
+ if ((target + size) > (mem->end + 1))
+ return mem->end + 1;
+
+ return target;
+}
+
+static int __init
+alloc_reserved_region(resource_size_t *start, resource_size_t size,
+ resource_size_t align, const char *name)
+{
+ struct resource *mem;
+ resource_size_t target;
+ int ret;
+
+ for (mem = system_ram; mem; mem = mem->sibling) {
+ target = find_free_region(mem, size, align);
+ if (target <= mem->end) {
+ ret = add_reserved_region(target, target + size - 1,
+ name);
+ if (!ret)
+ *start = target;
+ return ret;
+ }
+ }
+
+ return -ENOMEM;
+}
+
+/*
+ * Early framebuffer allocation. Works as follows:
+ * - If fbmem_size is zero, nothing will be allocated or reserved.
+ * - If fbmem_start is zero when setup_bootmem() is called,
+ * a block of fbmem_size bytes will be reserved before bootmem
+ * initialization. It will be aligned to the largest page size
+ * that fbmem_size is a multiple of.
+ * - If fbmem_start is nonzero, an area of size fbmem_size will be
+ * reserved at the physical address fbmem_start if possible. If
+ * it collides with other reserved memory, a different block of
+ * same size will be allocated, just as if fbmem_start was zero.
+ *
+ * Board-specific code may use these variables to set up platform data
+ * for the framebuffer driver if fbmem_size is nonzero.
+ */
+resource_size_t __initdata fbmem_start;
+resource_size_t __initdata fbmem_size;
+
+/*
+ * "fbmem=xxx[kKmM]" allocates the specified amount of boot memory for
+ * use as framebuffer.
+ *
+ * "fbmem=xxx[kKmM]@yyy[kKmM]" defines a memory region of size xxx and
+ * starting at yyy to be reserved for use as framebuffer.
+ *
+ * The kernel won't verify that the memory region starting at yyy
+ * actually contains usable RAM.
+ */
+static int __init early_parse_fbmem(char *p)
+{
+ int ret;
+ unsigned long align;
+
+ fbmem_size = memparse(p, &p);
+ if (*p == '@') {
+ fbmem_start = memparse(p + 1, &p);
+ ret = add_reserved_region(fbmem_start,
+ fbmem_start + fbmem_size - 1,
+ "Framebuffer");
+ if (ret) {
+ printk(KERN_WARNING
+ "Failed to reserve framebuffer memory\n");
+ fbmem_start = 0;
+ }
+ }
+
+ if (!fbmem_start) {
+ if ((fbmem_size & 0x000fffffUL) == 0)
+ align = 0x100000; /* 1 MiB */
+ else if ((fbmem_size & 0x0000ffffUL) == 0)
+ align = 0x10000; /* 64 KiB */
+ else
+ align = 0x1000; /* 4 KiB */
+
+ ret = alloc_reserved_region(&fbmem_start, fbmem_size,
+ align, "Framebuffer");
+ if (ret) {
+ printk(KERN_WARNING
+ "Failed to allocate framebuffer memory\n");
+ fbmem_size = 0;
+ } else {
+ memset(__va(fbmem_start), 0, fbmem_size);
+ }
+ }
+
+ return 0;
+}
+early_param("fbmem", early_parse_fbmem);
+
+/*
+ * Pick out the memory size. We look for mem=size@start,
+ * where start and size are "size[KkMmGg]"
+ */
+static int __init early_mem(char *p)
+{
+ resource_size_t size, start;
+
+ start = system_ram->start;
+ size = memparse(p, &p);
+ if (*p == '@')
+ start = memparse(p + 1, &p);
+
+ system_ram->start = start;
+ system_ram->end = system_ram->start + size - 1;
+ return 0;
+}
+early_param("mem", early_mem);
+
+static int __init parse_tag_core(struct tag *tag)
+{
+ if (tag->hdr.size > 2) {
+ if ((tag->u.core.flags & 1) == 0)
+ root_mountflags &= ~MS_RDONLY;
+ ROOT_DEV = new_decode_dev(tag->u.core.rootdev);
+ }
+ return 0;
+}
+__tagtable(ATAG_CORE, parse_tag_core);
+
+static int __init parse_tag_mem(struct tag *tag)
+{
+ unsigned long start, end;
+
+ /*
+ * Ignore zero-sized entries. If we're running standalone, the
+ * SDRAM code may emit such entries if something goes
+ * wrong...
+ */
+ if (tag->u.mem_range.size == 0)
+ return 0;
+
+ start = tag->u.mem_range.addr;
+ end = tag->u.mem_range.addr + tag->u.mem_range.size - 1;
+
+ add_physical_memory(start, end);
+ return 0;
+}
+__tagtable(ATAG_MEM, parse_tag_mem);
+
+static int __init parse_tag_rdimg(struct tag *tag)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ struct tag_mem_range *mem = &tag->u.mem_range;
+ int ret;
+
+ if (initrd_start) {
+ printk(KERN_WARNING
+ "Warning: Only the first initrd image will be used\n");
+ return 0;
+ }
+
+ ret = add_reserved_region(mem->addr, mem->addr + mem->size - 1,
+ "initrd");
+ if (ret) {
+ printk(KERN_WARNING
+ "Warning: Failed to reserve initrd memory\n");
+ return ret;
+ }
+
+ initrd_start = (unsigned long)__va(mem->addr);
+ initrd_end = initrd_start + mem->size;
+#else
+ printk(KERN_WARNING "RAM disk image present, but "
+ "no initrd support in kernel, ignoring\n");
+#endif
+
+ return 0;
+}
+__tagtable(ATAG_RDIMG, parse_tag_rdimg);
+
+static int __init parse_tag_rsvd_mem(struct tag *tag)
+{
+ struct tag_mem_range *mem = &tag->u.mem_range;
+
+ return add_reserved_region(mem->addr, mem->addr + mem->size - 1,
+ "Reserved");
+}
+__tagtable(ATAG_RSVD_MEM, parse_tag_rsvd_mem);
+
+static int __init parse_tag_cmdline(struct tag *tag)
+{
+ strlcpy(boot_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE);
+ return 0;
+}
+__tagtable(ATAG_CMDLINE, parse_tag_cmdline);
+
+static int __init parse_tag_clock(struct tag *tag)
+{
+ /*
+ * We'll figure out the clocks by peeking at the system
+ * manager regs directly.
+ */
+ return 0;
+}
+__tagtable(ATAG_CLOCK, parse_tag_clock);
+
+/*
+ * The board_number correspond to the bd->bi_board_number in U-Boot. This
+ * parameter is only available during initialisation and can be used in some
+ * kind of board identification.
+ */
+u32 __initdata board_number;
+
+static int __init parse_tag_boardinfo(struct tag *tag)
+{
+ board_number = tag->u.boardinfo.board_number;
+
+ return 0;
+}
+__tagtable(ATAG_BOARDINFO, parse_tag_boardinfo);
+
+/*
+ * Scan the tag table for this tag, and call its parse function. The
+ * tag table is built by the linker from all the __tagtable
+ * declarations.
+ */
+static int __init parse_tag(struct tag *tag)
+{
+ extern struct tagtable __tagtable_begin, __tagtable_end;
+ struct tagtable *t;
+
+ for (t = &__tagtable_begin; t < &__tagtable_end; t++)
+ if (tag->hdr.tag == t->tag) {
+ t->parse(tag);
+ break;
+ }
+
+ return t < &__tagtable_end;
+}
+
+/*
+ * Parse all tags in the list we got from the boot loader
+ */
+static void __init parse_tags(struct tag *t)
+{
+ for (; t->hdr.tag != ATAG_NONE; t = tag_next(t))
+ if (!parse_tag(t))
+ printk(KERN_WARNING
+ "Ignoring unrecognised tag 0x%08x\n",
+ t->hdr.tag);
+}
+
+/*
+ * Find a free memory region large enough for storing the
+ * bootmem bitmap.
+ */
+static unsigned long __init
+find_bootmap_pfn(const struct resource *mem)
+{
+ unsigned long bootmap_pages, bootmap_len;
+ unsigned long node_pages = PFN_UP(resource_size(mem));
+ unsigned long bootmap_start;
+
+ bootmap_pages = bootmem_bootmap_pages(node_pages);
+ bootmap_len = bootmap_pages << PAGE_SHIFT;
+
+ /*
+ * Find a large enough region without reserved pages for
+ * storing the bootmem bitmap. We can take advantage of the
+ * fact that all lists have been sorted.
+ *
+ * We have to check that we don't collide with any reserved
+ * regions, which includes the kernel image and any RAMDISK
+ * images.
+ */
+ bootmap_start = find_free_region(mem, bootmap_len, PAGE_SIZE);
+
+ return bootmap_start >> PAGE_SHIFT;
+}
+
+#define MAX_LOWMEM HIGHMEM_START
+#define MAX_LOWMEM_PFN PFN_DOWN(MAX_LOWMEM)
+
+static void __init setup_bootmem(void)
+{
+ unsigned bootmap_size;
+ unsigned long first_pfn, bootmap_pfn, pages;
+ unsigned long max_pfn, max_low_pfn;
+ unsigned node = 0;
+ struct resource *res;
+
+ printk(KERN_INFO "Physical memory:\n");
+ for (res = system_ram; res; res = res->sibling)
+ printk(" %08x-%08x\n", res->start, res->end);
+ printk(KERN_INFO "Reserved memory:\n");
+ for (res = reserved; res; res = res->sibling)
+ printk(" %08x-%08x: %s\n",
+ res->start, res->end, res->name);
+
+ nodes_clear(node_online_map);
+
+ if (system_ram->sibling)
+ printk(KERN_WARNING "Only using first memory bank\n");
+
+ for (res = system_ram; res; res = NULL) {
+ first_pfn = PFN_UP(res->start);
+ max_low_pfn = max_pfn = PFN_DOWN(res->end + 1);
+ bootmap_pfn = find_bootmap_pfn(res);
+ if (bootmap_pfn > max_pfn)
+ panic("No space for bootmem bitmap!\n");
+
+ if (max_low_pfn > MAX_LOWMEM_PFN) {
+ max_low_pfn = MAX_LOWMEM_PFN;
+#ifndef CONFIG_HIGHMEM
+ /*
+ * Lowmem is memory that can be addressed
+ * directly through P1/P2
+ */
+ printk(KERN_WARNING
+ "Node %u: Only %ld MiB of memory will be used.\n",
+ node, MAX_LOWMEM >> 20);
+ printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n");
+#else
+#error HIGHMEM is not supported by AVR32 yet
+#endif
+ }
+
+ /* Initialize the boot-time allocator with low memory only. */
+ bootmap_size = init_bootmem_node(NODE_DATA(node), bootmap_pfn,
+ first_pfn, max_low_pfn);
+
+ /*
+ * Register fully available RAM pages with the bootmem
+ * allocator.
+ */
+ pages = max_low_pfn - first_pfn;
+ free_bootmem_node (NODE_DATA(node), PFN_PHYS(first_pfn),
+ PFN_PHYS(pages));
+
+ /* Reserve space for the bootmem bitmap... */
+ reserve_bootmem_node(NODE_DATA(node),
+ PFN_PHYS(bootmap_pfn),
+ bootmap_size,
+ BOOTMEM_DEFAULT);
+
+ /* ...and any other reserved regions. */
+ for (res = reserved; res; res = res->sibling) {
+ if (res->start > PFN_PHYS(max_pfn))
+ break;
+
+ /*
+ * resource_init will complain about partial
+ * overlaps, so we'll just ignore such
+ * resources for now.
+ */
+ if (res->start >= PFN_PHYS(first_pfn)
+ && res->end < PFN_PHYS(max_pfn))
+ reserve_bootmem_node(NODE_DATA(node),
+ res->start,
+ resource_size(res),
+ BOOTMEM_DEFAULT);
+ }
+
+ node_set_online(node);
+ }
+}
+
+void __init setup_arch (char **cmdline_p)
+{
+ struct clk *cpu_clk;
+
+ init_mm.start_code = (unsigned long)_stext;
+ init_mm.end_code = (unsigned long)_etext;
+ init_mm.end_data = (unsigned long)_edata;
+ init_mm.brk = (unsigned long)_end;
+
+ /*
+ * Include .init section to make allocations easier. It will
+ * be removed before the resource is actually requested.
+ */
+ kernel_code.start = __pa(__init_begin);
+ kernel_code.end = __pa(init_mm.end_code - 1);
+ kernel_data.start = __pa(init_mm.end_code);
+ kernel_data.end = __pa(init_mm.brk - 1);
+
+ parse_tags(bootloader_tags);
+
+ setup_processor();
+ setup_platform();
+ setup_board();
+
+ cpu_clk = clk_get(NULL, "cpu");
+ if (IS_ERR(cpu_clk)) {
+ printk(KERN_WARNING "Warning: Unable to get CPU clock\n");
+ } else {
+ unsigned long cpu_hz = clk_get_rate(cpu_clk);
+
+ /*
+ * Well, duh, but it's probably a good idea to
+ * increment the use count.
+ */
+ clk_enable(cpu_clk);
+
+ boot_cpu_data.clk = cpu_clk;
+ boot_cpu_data.loops_per_jiffy = cpu_hz * 4;
+ printk("CPU: Running at %lu.%03lu MHz\n",
+ ((cpu_hz + 500) / 1000) / 1000,
+ ((cpu_hz + 500) / 1000) % 1000);
+ }
+
+ strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
+ *cmdline_p = command_line;
+ parse_early_param();
+
+ setup_bootmem();
+
+#ifdef CONFIG_VT
+ conswitchp = &dummy_con;
+#endif
+
+ paging_init();
+ resource_init();
+}
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
new file mode 100644
index 000000000..8f1c63b9b
--- /dev/null
+++ b/arch/avr32/kernel/signal.c
@@ -0,0 +1,288 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * Based on linux/arch/sh/kernel/signal.c
+ * Copyright (C) 1999, 2000 Niibe Yutaka & Kaz Kojima
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/errno.h>
+#include <linux/ptrace.h>
+#include <linux/unistd.h>
+#include <linux/tracehook.h>
+
+#include <asm/uaccess.h>
+#include <asm/ucontext.h>
+#include <asm/syscalls.h>
+
+struct rt_sigframe
+{
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned long retcode;
+};
+
+static int
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+{
+ int err = 0;
+
+#define COPY(x) err |= __get_user(regs->x, &sc->x)
+ COPY(sr);
+ COPY(pc);
+ COPY(lr);
+ COPY(sp);
+ COPY(r12);
+ COPY(r11);
+ COPY(r10);
+ COPY(r9);
+ COPY(r8);
+ COPY(r7);
+ COPY(r6);
+ COPY(r5);
+ COPY(r4);
+ COPY(r3);
+ COPY(r2);
+ COPY(r1);
+ COPY(r0);
+#undef COPY
+
+ /*
+ * Don't allow anyone to pretend they're running in supervisor
+ * mode or something...
+ */
+ err |= !valid_user_regs(regs);
+
+ return err;
+}
+
+
+asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ sigset_t set;
+
+ /* Always make any pending restarted system calls return -EINTR */
+ current->restart_block.fn = do_no_restart_syscall;
+
+ frame = (struct rt_sigframe __user *)regs->sp;
+ pr_debug("SIG return: frame = %p\n", frame);
+
+ if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
+ goto badframe;
+
+ if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+ goto badframe;
+
+ set_current_blocked(&set);
+
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ goto badframe;
+
+ if (restore_altstack(&frame->uc.uc_stack))
+ goto badframe;
+
+ pr_debug("Context restored: pc = %08lx, lr = %08lx, sp = %08lx\n",
+ regs->pc, regs->lr, regs->sp);
+
+ return regs->r12;
+
+badframe:
+ force_sig(SIGSEGV, current);
+ return 0;
+}
+
+static int
+setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
+{
+ int err = 0;
+
+#define COPY(x) err |= __put_user(regs->x, &sc->x)
+ COPY(sr);
+ COPY(pc);
+ COPY(lr);
+ COPY(sp);
+ COPY(r12);
+ COPY(r11);
+ COPY(r10);
+ COPY(r9);
+ COPY(r8);
+ COPY(r7);
+ COPY(r6);
+ COPY(r5);
+ COPY(r4);
+ COPY(r3);
+ COPY(r2);
+ COPY(r1);
+ COPY(r0);
+#undef COPY
+
+ return err;
+}
+
+static inline void __user *
+get_sigframe(struct ksignal *ksig, struct pt_regs *regs, int framesize)
+{
+ unsigned long sp = sigsp(regs->sp, ksig);
+
+ return (void __user *)((sp - framesize) & ~3);
+}
+
+static int
+setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs)
+{
+ struct rt_sigframe __user *frame;
+ int err = 0;
+
+ frame = get_sigframe(ksig, regs, sizeof(*frame));
+ err = -EFAULT;
+ if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+ goto out;
+
+ /*
+ * Set up the return code:
+ *
+ * mov r8, __NR_rt_sigreturn
+ * scall
+ *
+ * Note: This will blow up since we're using a non-executable
+ * stack. Better use SA_RESTORER.
+ */
+#if __NR_rt_sigreturn > 127
+# error __NR_rt_sigreturn must be < 127 to fit in a short mov
+#endif
+ err = __put_user(0x3008d733 | (__NR_rt_sigreturn << 20),
+ &frame->retcode);
+
+ err |= copy_siginfo_to_user(&frame->info, &ksig->info);
+
+ /* Set up the ucontext */
+ err |= __put_user(0, &frame->uc.uc_flags);
+ err |= __put_user(NULL, &frame->uc.uc_link);
+ err |= __save_altstack(&frame->uc.uc_stack, regs->sp);
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, regs);
+ err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+
+ if (err)
+ goto out;
+
+ regs->r12 = ksig->sig;
+ regs->r11 = (unsigned long) &frame->info;
+ regs->r10 = (unsigned long) &frame->uc;
+ regs->sp = (unsigned long) frame;
+ if (ksig->ka.sa.sa_flags & SA_RESTORER)
+ regs->lr = (unsigned long)ksig->ka.sa.sa_restorer;
+ else {
+ printk(KERN_NOTICE "[%s:%d] did not set SA_RESTORER\n",
+ current->comm, current->pid);
+ regs->lr = (unsigned long) &frame->retcode;
+ }
+
+ pr_debug("SIG deliver [%s:%d]: sig=%d sp=0x%lx pc=0x%lx->0x%p lr=0x%lx\n",
+ current->comm, current->pid, ksig->sig, regs->sp,
+ regs->pc, ksig->ka.sa.sa_handler, regs->lr);
+
+ regs->pc = (unsigned long)ksig->ka.sa.sa_handler;
+
+out:
+ return err;
+}
+
+static inline void setup_syscall_restart(struct pt_regs *regs)
+{
+ if (regs->r12 == -ERESTART_RESTARTBLOCK)
+ regs->r8 = __NR_restart_syscall;
+ else
+ regs->r12 = regs->r12_orig;
+ regs->pc -= 2;
+}
+
+static inline void
+handle_signal(struct ksignal *ksig, struct pt_regs *regs, int syscall)
+{
+ int ret;
+
+ /*
+ * Set up the stack frame
+ */
+ ret = setup_rt_frame(ksig, sigmask_to_save(), regs);
+
+ /*
+ * Check that the resulting registers are sane
+ */
+ ret |= !valid_user_regs(regs);
+
+ /*
+ * Block the signal if we were successful.
+ */
+ signal_setup_done(ret, ksig, 0);
+}
+
+/*
+ * Note that 'init' is a special process: it doesn't get signals it
+ * doesn't want to handle. Thus you cannot kill init even with a
+ * SIGKILL even by mistake.
+ */
+static void do_signal(struct pt_regs *regs, int syscall)
+{
+ struct ksignal ksig;
+
+ /*
+ * We want the common case to go fast, which is why we may in
+ * certain cases get here from kernel mode. Just return
+ * without doing anything if so.
+ */
+ if (!user_mode(regs))
+ return;
+
+ get_signal(&ksig);
+ if (syscall) {
+ switch (regs->r12) {
+ case -ERESTART_RESTARTBLOCK:
+ case -ERESTARTNOHAND:
+ if (ksig.sig > 0) {
+ regs->r12 = -EINTR;
+ break;
+ }
+ /* fall through */
+ case -ERESTARTSYS:
+ if (ksig.sig > 0 && !(ksig.ka.sa.sa_flags & SA_RESTART)) {
+ regs->r12 = -EINTR;
+ break;
+ }
+ /* fall through */
+ case -ERESTARTNOINTR:
+ setup_syscall_restart(regs);
+ }
+ }
+
+ if (!ksig.sig) {
+ /* No signal to deliver -- put the saved sigmask back */
+ restore_saved_sigmask();
+ return;
+ }
+
+ handle_signal(&ksig, regs, syscall);
+}
+
+asmlinkage void do_notify_resume(struct pt_regs *regs, struct thread_info *ti)
+{
+ int syscall = 0;
+
+ if ((sysreg_read(SR) & MODE_MASK) == MODE_SUPERVISOR)
+ syscall = 1;
+
+ if (ti->flags & _TIF_SIGPENDING)
+ do_signal(regs, syscall);
+
+ if (ti->flags & _TIF_NOTIFY_RESUME) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ }
+}
diff --git a/arch/avr32/kernel/stacktrace.c b/arch/avr32/kernel/stacktrace.c
new file mode 100644
index 000000000..c09f0d8dd
--- /dev/null
+++ b/arch/avr32/kernel/stacktrace.c
@@ -0,0 +1,55 @@
+/*
+ * Stack trace management functions
+ *
+ * Copyright (C) 2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/sched.h>
+#include <linux/stacktrace.h>
+#include <linux/thread_info.h>
+#include <linux/module.h>
+
+register unsigned long current_frame_pointer asm("r7");
+
+struct stackframe {
+ unsigned long lr;
+ unsigned long fp;
+};
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+ unsigned long low, high;
+ unsigned long fp;
+ struct stackframe *frame;
+ int skip = trace->skip;
+
+ low = (unsigned long)task_stack_page(current);
+ high = low + THREAD_SIZE;
+ fp = current_frame_pointer;
+
+ while (fp >= low && fp <= (high - 8)) {
+ frame = (struct stackframe *)fp;
+
+ if (skip) {
+ skip--;
+ } else {
+ trace->entries[trace->nr_entries++] = frame->lr;
+ if (trace->nr_entries >= trace->max_entries)
+ break;
+ }
+
+ /*
+ * The next frame must be at a higher address than the
+ * current frame.
+ */
+ low = fp + 8;
+ fp = frame->fp;
+ }
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
diff --git a/arch/avr32/kernel/switch_to.S b/arch/avr32/kernel/switch_to.S
new file mode 100644
index 000000000..a48d04672
--- /dev/null
+++ b/arch/avr32/kernel/switch_to.S
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <asm/sysreg.h>
+
+ .text
+ .global __switch_to
+ .type __switch_to, @function
+
+ /* Switch thread context from "prev" to "next", returning "last"
+ * r12 : prev
+ * r11 : &prev->thread + 1
+ * r10 : &next->thread
+ */
+__switch_to:
+ stm --r11, r0,r1,r2,r3,r4,r5,r6,r7,sp,lr
+ mfsr r9, SYSREG_SR
+ st.w --r11, r9
+ ld.w r8, r10++
+ /*
+ * schedule() may have been called from a mode with a different
+ * set of registers. Make sure we don't lose anything here.
+ */
+ pushm r10,r12
+ mtsr SYSREG_SR, r8
+ frs /* flush the return stack */
+ sub pc, -2 /* flush the pipeline */
+ popm r10,r12
+ ldm r10++, r0,r1,r2,r3,r4,r5,r6,r7,sp,pc
+ .size __switch_to, . - __switch_to
diff --git a/arch/avr32/kernel/syscall-stubs.S b/arch/avr32/kernel/syscall-stubs.S
new file mode 100644
index 000000000..f9c68fab0
--- /dev/null
+++ b/arch/avr32/kernel/syscall-stubs.S
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2005-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Stubs for syscalls that require access to pt_regs or that take more
+ * than five parameters.
+ */
+
+#define ARG6 r3
+
+ .text
+ .global __sys_rt_sigsuspend
+ .type __sys_rt_sigsuspend,@function
+__sys_rt_sigsuspend:
+ mov r10, sp
+ rjmp sys_rt_sigsuspend
+
+ .global __sys_rt_sigreturn
+ .type __sys_rt_sigreturn,@function
+__sys_rt_sigreturn:
+ mov r12, sp
+ rjmp sys_rt_sigreturn
+
+ .global __sys_mmap2
+ .type __sys_mmap2,@function
+__sys_mmap2:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_mmap_pgoff
+ sub sp, -4
+ popm pc
+
+ .global __sys_sendto
+ .type __sys_sendto,@function
+__sys_sendto:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_sendto
+ sub sp, -4
+ popm pc
+
+ .global __sys_recvfrom
+ .type __sys_recvfrom,@function
+__sys_recvfrom:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_recvfrom
+ sub sp, -4
+ popm pc
+
+ .global __sys_pselect6
+ .type __sys_pselect6,@function
+__sys_pselect6:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_pselect6
+ sub sp, -4
+ popm pc
+
+ .global __sys_splice
+ .type __sys_splice,@function
+__sys_splice:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_splice
+ sub sp, -4
+ popm pc
+
+ .global __sys_epoll_pwait
+ .type __sys_epoll_pwait,@function
+__sys_epoll_pwait:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_epoll_pwait
+ sub sp, -4
+ popm pc
+
+ .global __sys_sync_file_range
+ .type __sys_sync_file_range,@function
+__sys_sync_file_range:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_sync_file_range
+ sub sp, -4
+ popm pc
+
+ .global __sys_fallocate
+ .type __sys_fallocate,@function
+__sys_fallocate:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_fallocate
+ sub sp, -4
+ popm pc
+
+ .global __sys_fanotify_mark
+ .type __sys_fanotify_mark,@function
+__sys_fanotify_mark:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_fanotify_mark
+ sub sp, -4
+ popm pc
+
+ .global __sys_process_vm_readv
+ .type __sys_process_vm_readv,@function
+__sys_process_vm_readv:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_process_vm_readv
+ sub sp, -4
+ popm pc
+
+ .global __sys_process_vm_writev
+ .type __sys_process_vm_writev,@function
+__sys_process_vm_writev:
+ pushm lr
+ st.w --sp, ARG6
+ call sys_process_vm_writev
+ sub sp, -4
+ popm pc
diff --git a/arch/avr32/kernel/syscall_table.S b/arch/avr32/kernel/syscall_table.S
new file mode 100644
index 000000000..c3b593bfc
--- /dev/null
+++ b/arch/avr32/kernel/syscall_table.S
@@ -0,0 +1,337 @@
+/*
+ * AVR32 system call table
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+ .section .rodata,"a",@progbits
+ .type sys_call_table,@object
+ .global sys_call_table
+ .align 2
+sys_call_table:
+ .long sys_restart_syscall
+ .long sys_exit
+ .long sys_fork
+ .long sys_read
+ .long sys_write
+ .long sys_open /* 5 */
+ .long sys_close
+ .long sys_umask
+ .long sys_creat
+ .long sys_link
+ .long sys_unlink /* 10 */
+ .long sys_execve
+ .long sys_chdir
+ .long sys_time
+ .long sys_mknod
+ .long sys_chmod /* 15 */
+ .long sys_chown
+ .long sys_lchown
+ .long sys_lseek
+ .long sys_llseek
+ .long sys_getpid /* 20 */
+ .long sys_mount
+ .long sys_umount
+ .long sys_setuid
+ .long sys_getuid
+ .long sys_stime /* 25 */
+ .long sys_ptrace
+ .long sys_alarm
+ .long sys_pause
+ .long sys_utime
+ .long sys_newstat /* 30 */
+ .long sys_newfstat
+ .long sys_newlstat
+ .long sys_access
+ .long sys_chroot
+ .long sys_sync /* 35 */
+ .long sys_fsync
+ .long sys_kill
+ .long sys_rename
+ .long sys_mkdir
+ .long sys_rmdir /* 40 */
+ .long sys_dup
+ .long sys_pipe
+ .long sys_times
+ .long sys_clone
+ .long sys_brk /* 45 */
+ .long sys_setgid
+ .long sys_getgid
+ .long sys_getcwd
+ .long sys_geteuid
+ .long sys_getegid /* 50 */
+ .long sys_acct
+ .long sys_setfsuid
+ .long sys_setfsgid
+ .long sys_ioctl
+ .long sys_fcntl /* 55 */
+ .long sys_setpgid
+ .long sys_mremap
+ .long sys_setresuid
+ .long sys_getresuid
+ .long sys_setreuid /* 60 */
+ .long sys_setregid
+ .long sys_ustat
+ .long sys_dup2
+ .long sys_getppid
+ .long sys_getpgrp /* 65 */
+ .long sys_setsid
+ .long sys_rt_sigaction
+ .long __sys_rt_sigreturn
+ .long sys_rt_sigprocmask
+ .long sys_rt_sigpending /* 70 */
+ .long sys_rt_sigtimedwait
+ .long sys_rt_sigqueueinfo
+ .long __sys_rt_sigsuspend
+ .long sys_sethostname
+ .long sys_setrlimit /* 75 */
+ .long sys_getrlimit
+ .long sys_getrusage
+ .long sys_gettimeofday
+ .long sys_settimeofday
+ .long sys_getgroups /* 80 */
+ .long sys_setgroups
+ .long sys_select
+ .long sys_symlink
+ .long sys_fchdir
+ .long sys_readlink /* 85 */
+ .long sys_pread64
+ .long sys_pwrite64
+ .long sys_swapon
+ .long sys_reboot
+ .long __sys_mmap2 /* 90 */
+ .long sys_munmap
+ .long sys_truncate
+ .long sys_ftruncate
+ .long sys_fchmod
+ .long sys_fchown /* 95 */
+ .long sys_getpriority
+ .long sys_setpriority
+ .long sys_wait4
+ .long sys_statfs
+ .long sys_fstatfs /* 100 */
+ .long sys_vhangup
+ .long sys_sigaltstack
+ .long sys_syslog
+ .long sys_setitimer
+ .long sys_getitimer /* 105 */
+ .long sys_swapoff
+ .long sys_sysinfo
+ .long sys_ni_syscall /* was sys_ipc briefly */
+ .long sys_sendfile
+ .long sys_setdomainname /* 110 */
+ .long sys_newuname
+ .long sys_adjtimex
+ .long sys_mprotect
+ .long sys_vfork
+ .long sys_init_module /* 115 */
+ .long sys_delete_module
+ .long sys_quotactl
+ .long sys_getpgid
+ .long sys_bdflush
+ .long sys_sysfs /* 120 */
+ .long sys_personality
+ .long sys_ni_syscall /* reserved for afs_syscall */
+ .long sys_getdents
+ .long sys_flock
+ .long sys_msync /* 125 */
+ .long sys_readv
+ .long sys_writev
+ .long sys_getsid
+ .long sys_fdatasync
+ .long sys_sysctl /* 130 */
+ .long sys_mlock
+ .long sys_munlock
+ .long sys_mlockall
+ .long sys_munlockall
+ .long sys_sched_setparam /* 135 */
+ .long sys_sched_getparam
+ .long sys_sched_setscheduler
+ .long sys_sched_getscheduler
+ .long sys_sched_yield
+ .long sys_sched_get_priority_max /* 140 */
+ .long sys_sched_get_priority_min
+ .long sys_sched_rr_get_interval
+ .long sys_nanosleep
+ .long sys_poll
+ .long sys_ni_syscall /* 145 was nfsservctl */
+ .long sys_setresgid
+ .long sys_getresgid
+ .long sys_prctl
+ .long sys_socket
+ .long sys_bind /* 150 */
+ .long sys_connect
+ .long sys_listen
+ .long sys_accept
+ .long sys_getsockname
+ .long sys_getpeername /* 155 */
+ .long sys_socketpair
+ .long sys_send
+ .long sys_recv
+ .long __sys_sendto
+ .long __sys_recvfrom /* 160 */
+ .long sys_shutdown
+ .long sys_setsockopt
+ .long sys_getsockopt
+ .long sys_sendmsg
+ .long sys_recvmsg /* 165 */
+ .long sys_truncate64
+ .long sys_ftruncate64
+ .long sys_stat64
+ .long sys_lstat64
+ .long sys_fstat64 /* 170 */
+ .long sys_pivot_root
+ .long sys_mincore
+ .long sys_madvise
+ .long sys_getdents64
+ .long sys_fcntl64 /* 175 */
+ .long sys_gettid
+ .long sys_readahead
+ .long sys_setxattr
+ .long sys_lsetxattr
+ .long sys_fsetxattr /* 180 */
+ .long sys_getxattr
+ .long sys_lgetxattr
+ .long sys_fgetxattr
+ .long sys_listxattr
+ .long sys_llistxattr /* 185 */
+ .long sys_flistxattr
+ .long sys_removexattr
+ .long sys_lremovexattr
+ .long sys_fremovexattr
+ .long sys_tkill /* 190 */
+ .long sys_sendfile64
+ .long sys_futex
+ .long sys_sched_setaffinity
+ .long sys_sched_getaffinity
+ .long sys_capget /* 195 */
+ .long sys_capset
+ .long sys_io_setup
+ .long sys_io_destroy
+ .long sys_io_getevents
+ .long sys_io_submit /* 200 */
+ .long sys_io_cancel
+ .long sys_fadvise64
+ .long sys_exit_group
+ .long sys_lookup_dcookie
+ .long sys_epoll_create /* 205 */
+ .long sys_epoll_ctl
+ .long sys_epoll_wait
+ .long sys_remap_file_pages
+ .long sys_set_tid_address
+ .long sys_timer_create /* 210 */
+ .long sys_timer_settime
+ .long sys_timer_gettime
+ .long sys_timer_getoverrun
+ .long sys_timer_delete
+ .long sys_clock_settime /* 215 */
+ .long sys_clock_gettime
+ .long sys_clock_getres
+ .long sys_clock_nanosleep
+ .long sys_statfs64
+ .long sys_fstatfs64 /* 220 */
+ .long sys_tgkill
+ .long sys_ni_syscall /* reserved for TUX */
+ .long sys_utimes
+ .long sys_fadvise64_64
+ .long sys_cacheflush /* 225 */
+ .long sys_ni_syscall /* sys_vserver */
+ .long sys_mq_open
+ .long sys_mq_unlink
+ .long sys_mq_timedsend
+ .long sys_mq_timedreceive /* 230 */
+ .long sys_mq_notify
+ .long sys_mq_getsetattr
+ .long sys_kexec_load
+ .long sys_waitid
+ .long sys_add_key /* 235 */
+ .long sys_request_key
+ .long sys_keyctl
+ .long sys_ioprio_set
+ .long sys_ioprio_get
+ .long sys_inotify_init /* 240 */
+ .long sys_inotify_add_watch
+ .long sys_inotify_rm_watch
+ .long sys_openat
+ .long sys_mkdirat
+ .long sys_mknodat /* 245 */
+ .long sys_fchownat
+ .long sys_futimesat
+ .long sys_fstatat64
+ .long sys_unlinkat
+ .long sys_renameat /* 250 */
+ .long sys_linkat
+ .long sys_symlinkat
+ .long sys_readlinkat
+ .long sys_fchmodat
+ .long sys_faccessat /* 255 */
+ .long __sys_pselect6
+ .long sys_ppoll
+ .long sys_unshare
+ .long sys_set_robust_list
+ .long sys_get_robust_list /* 260 */
+ .long __sys_splice
+ .long __sys_sync_file_range
+ .long sys_tee
+ .long sys_vmsplice
+ .long __sys_epoll_pwait /* 265 */
+ .long sys_msgget
+ .long sys_msgsnd
+ .long sys_msgrcv
+ .long sys_msgctl
+ .long sys_semget /* 270 */
+ .long sys_semop
+ .long sys_semctl
+ .long sys_semtimedop
+ .long sys_shmat
+ .long sys_shmget /* 275 */
+ .long sys_shmdt
+ .long sys_shmctl
+ .long sys_utimensat
+ .long sys_signalfd
+ .long sys_ni_syscall /* 280, was sys_timerfd */
+ .long sys_eventfd
+ .long sys_recvmmsg
+ .long sys_setns
+ .long sys_pread64
+ .long sys_pwrite64 /* 285 */
+ .long sys_timerfd_create
+ .long __sys_fallocate
+ .long sys_timerfd_settime
+ .long sys_timerfd_gettime
+ .long sys_signalfd4 /* 290 */
+ .long sys_eventfd2
+ .long sys_epoll_create1
+ .long sys_dup3
+ .long sys_pipe2
+ .long sys_inotify_init1 /* 295 */
+ .long sys_preadv
+ .long sys_pwritev
+ .long sys_rt_tgsigqueueinfo
+ .long sys_perf_event_open
+ .long sys_recvmmsg /* 300 */
+ .long sys_fanotify_init
+ .long __sys_fanotify_mark
+ .long sys_prlimit64
+ .long sys_name_to_handle_at
+ .long sys_open_by_handle_at /* 305 */
+ .long sys_clock_adjtime
+ .long sys_syncfs
+ .long sys_sendmmsg
+ .long __sys_process_vm_readv
+ .long __sys_process_vm_writev /* 310 */
+ .long sys_kcmp
+ .long sys_finit_module
+ .long sys_sched_setattr
+ .long sys_sched_getattr
+ .long sys_renameat2 /* 315 */
+ .long sys_seccomp
+ .long sys_getrandom
+ .long sys_memfd_create
+ .long sys_bpf
+ .long sys_execveat /* 320 */
+ .long sys_ni_syscall /* r8 is saturated at nr_syscalls */
diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c
new file mode 100644
index 000000000..d0f771be9
--- /dev/null
+++ b/arch/avr32/kernel/time.c
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2004-2007 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/clockchips.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/time.h>
+#include <linux/cpu.h>
+
+#include <asm/sysreg.h>
+
+#include <mach/pm.h>
+
+
+static cycle_t read_cycle_count(struct clocksource *cs)
+{
+ return (cycle_t)sysreg_read(COUNT);
+}
+
+/*
+ * The architectural cycle count registers are a fine clocksource unless
+ * the system idle loop use sleep states like "idle": the CPU cycles
+ * measured by COUNT (and COMPARE) don't happen during sleep states.
+ * Their duration also changes if cpufreq changes the CPU clock rate.
+ * So we rate the clocksource using COUNT as very low quality.
+ */
+static struct clocksource counter = {
+ .name = "avr32_counter",
+ .rating = 50,
+ .read = read_cycle_count,
+ .mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static irqreturn_t timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evdev = dev_id;
+
+ if (unlikely(!(intc_get_pending(0) & 1)))
+ return IRQ_NONE;
+
+ /*
+ * Disable the interrupt until the clockevent subsystem
+ * reprograms it.
+ */
+ sysreg_write(COMPARE, 0);
+
+ evdev->event_handler(evdev);
+ return IRQ_HANDLED;
+}
+
+static struct irqaction timer_irqaction = {
+ .handler = timer_interrupt,
+ /* Oprofile uses the same irq as the timer, so allow it to be shared */
+ .flags = IRQF_TIMER | IRQF_SHARED,
+ .name = "avr32_comparator",
+};
+
+static int comparator_next_event(unsigned long delta,
+ struct clock_event_device *evdev)
+{
+ unsigned long flags;
+
+ raw_local_irq_save(flags);
+
+ /* The time to read COUNT then update COMPARE must be less
+ * than the min_delta_ns value for this clockevent source.
+ */
+ sysreg_write(COMPARE, (sysreg_read(COUNT) + delta) ? : 1);
+
+ raw_local_irq_restore(flags);
+
+ return 0;
+}
+
+static void comparator_mode(enum clock_event_mode mode,
+ struct clock_event_device *evdev)
+{
+ switch (mode) {
+ case CLOCK_EVT_MODE_ONESHOT:
+ pr_debug("%s: start\n", evdev->name);
+ /* FALLTHROUGH */
+ case CLOCK_EVT_MODE_RESUME:
+ /*
+ * If we're using the COUNT and COMPARE registers we
+ * need to force idle poll.
+ */
+ cpu_idle_poll_ctrl(true);
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ sysreg_write(COMPARE, 0);
+ pr_debug("%s: stop\n", evdev->name);
+ if (evdev->mode == CLOCK_EVT_MODE_ONESHOT ||
+ evdev->mode == CLOCK_EVT_MODE_RESUME) {
+ /*
+ * Only disable idle poll if we have forced that
+ * in a previous call.
+ */
+ cpu_idle_poll_ctrl(false);
+ }
+ break;
+ default:
+ BUG();
+ }
+}
+
+static struct clock_event_device comparator = {
+ .name = "avr32_comparator",
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 16,
+ .rating = 50,
+ .set_next_event = comparator_next_event,
+ .set_mode = comparator_mode,
+};
+
+void read_persistent_clock(struct timespec *ts)
+{
+ ts->tv_sec = mktime(2007, 1, 1, 0, 0, 0);
+ ts->tv_nsec = 0;
+}
+
+void __init time_init(void)
+{
+ unsigned long counter_hz;
+ int ret;
+
+ /* figure rate for counter */
+ counter_hz = clk_get_rate(boot_cpu_data.clk);
+ ret = clocksource_register_hz(&counter, counter_hz);
+ if (ret)
+ pr_debug("timer: could not register clocksource: %d\n", ret);
+
+ /* setup COMPARE clockevent */
+ comparator.mult = div_sc(counter_hz, NSEC_PER_SEC, comparator.shift);
+ comparator.max_delta_ns = clockevent_delta2ns((u32)~0, &comparator);
+ comparator.min_delta_ns = clockevent_delta2ns(50, &comparator) + 1;
+ comparator.cpumask = cpumask_of(0);
+
+ sysreg_write(COMPARE, 0);
+ timer_irqaction.dev_id = &comparator;
+
+ ret = setup_irq(0, &timer_irqaction);
+ if (ret)
+ pr_debug("timer: could not request IRQ 0: %d\n", ret);
+ else {
+ clockevents_register_device(&comparator);
+
+ pr_info("%s: irq 0, %lu.%03lu MHz\n", comparator.name,
+ ((counter_hz + 500) / 1000) / 1000,
+ ((counter_hz + 500) / 1000) % 1000);
+ }
+}
diff --git a/arch/avr32/kernel/traps.c b/arch/avr32/kernel/traps.c
new file mode 100644
index 000000000..682b24786
--- /dev/null
+++ b/arch/avr32/kernel/traps.c
@@ -0,0 +1,261 @@
+/*
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/bug.h>
+#include <linux/hardirq.h>
+#include <linux/init.h>
+#include <linux/kallsyms.h>
+#include <linux/kdebug.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/sched.h>
+#include <linux/uaccess.h>
+
+#include <asm/addrspace.h>
+#include <asm/mmu_context.h>
+#include <asm/ocd.h>
+#include <asm/sysreg.h>
+#include <asm/traps.h>
+
+static DEFINE_SPINLOCK(die_lock);
+
+void die(const char *str, struct pt_regs *regs, long err)
+{
+ static int die_counter;
+
+ console_verbose();
+ spin_lock_irq(&die_lock);
+ bust_spinlocks(1);
+
+ printk(KERN_ALERT "Oops: %s, sig: %ld [#%d]\n",
+ str, err, ++die_counter);
+
+ printk(KERN_EMERG);
+
+#ifdef CONFIG_PREEMPT
+ printk(KERN_CONT "PREEMPT ");
+#endif
+#ifdef CONFIG_FRAME_POINTER
+ printk(KERN_CONT "FRAME_POINTER ");
+#endif
+ if (current_cpu_data.features & AVR32_FEATURE_OCD) {
+ unsigned long did = ocd_read(DID);
+ printk(KERN_CONT "chip: 0x%03lx:0x%04lx rev %lu\n",
+ (did >> 1) & 0x7ff,
+ (did >> 12) & 0x7fff,
+ (did >> 28) & 0xf);
+ } else {
+ printk(KERN_CONT "cpu: arch %u r%u / core %u r%u\n",
+ current_cpu_data.arch_type,
+ current_cpu_data.arch_revision,
+ current_cpu_data.cpu_type,
+ current_cpu_data.cpu_revision);
+ }
+
+ print_modules();
+ show_regs_log_lvl(regs, KERN_EMERG);
+ show_stack_log_lvl(current, regs->sp, regs, KERN_EMERG);
+ bust_spinlocks(0);
+ add_taint(TAINT_DIE, LOCKDEP_NOW_UNRELIABLE);
+ spin_unlock_irq(&die_lock);
+
+ if (in_interrupt())
+ panic("Fatal exception in interrupt");
+
+ if (panic_on_oops)
+ panic("Fatal exception");
+
+ do_exit(err);
+}
+
+void _exception(long signr, struct pt_regs *regs, int code,
+ unsigned long addr)
+{
+ siginfo_t info;
+
+ if (!user_mode(regs)) {
+ const struct exception_table_entry *fixup;
+
+ /* Are we prepared to handle this kernel fault? */
+ fixup = search_exception_tables(regs->pc);
+ if (fixup) {
+ regs->pc = fixup->fixup;
+ return;
+ }
+ die("Unhandled exception in kernel mode", regs, signr);
+ }
+
+ memset(&info, 0, sizeof(info));
+ info.si_signo = signr;
+ info.si_code = code;
+ info.si_addr = (void __user *)addr;
+ force_sig_info(signr, &info, current);
+}
+
+asmlinkage void do_nmi(unsigned long ecr, struct pt_regs *regs)
+{
+ int ret;
+
+ nmi_enter();
+
+ ret = notify_die(DIE_NMI, "NMI", regs, 0, ecr, SIGINT);
+ switch (ret) {
+ case NOTIFY_OK:
+ case NOTIFY_STOP:
+ break;
+ case NOTIFY_BAD:
+ die("Fatal Non-Maskable Interrupt", regs, SIGINT);
+ default:
+ printk(KERN_ALERT "Got NMI, but nobody cared. Disabling...\n");
+ nmi_disable();
+ break;
+ }
+ nmi_exit();
+}
+
+asmlinkage void do_critical_exception(unsigned long ecr, struct pt_regs *regs)
+{
+ die("Critical exception", regs, SIGKILL);
+}
+
+asmlinkage void do_address_exception(unsigned long ecr, struct pt_regs *regs)
+{
+ _exception(SIGBUS, regs, BUS_ADRALN, regs->pc);
+}
+
+/* This way of handling undefined instructions is stolen from ARM */
+static LIST_HEAD(undef_hook);
+static DEFINE_SPINLOCK(undef_lock);
+
+void register_undef_hook(struct undef_hook *hook)
+{
+ spin_lock_irq(&undef_lock);
+ list_add(&hook->node, &undef_hook);
+ spin_unlock_irq(&undef_lock);
+}
+
+void unregister_undef_hook(struct undef_hook *hook)
+{
+ spin_lock_irq(&undef_lock);
+ list_del(&hook->node);
+ spin_unlock_irq(&undef_lock);
+}
+
+static int do_cop_absent(u32 insn)
+{
+ int cop_nr;
+ u32 cpucr;
+
+ if ((insn & 0xfdf00000) == 0xf1900000)
+ /* LDC0 */
+ cop_nr = 0;
+ else
+ cop_nr = (insn >> 13) & 0x7;
+
+ /* Try enabling the coprocessor */
+ cpucr = sysreg_read(CPUCR);
+ cpucr |= (1 << (24 + cop_nr));
+ sysreg_write(CPUCR, cpucr);
+
+ cpucr = sysreg_read(CPUCR);
+ if (!(cpucr & (1 << (24 + cop_nr))))
+ return -ENODEV;
+
+ return 0;
+}
+
+#ifdef CONFIG_BUG
+int is_valid_bugaddr(unsigned long pc)
+{
+ unsigned short opcode;
+
+ if (pc < PAGE_OFFSET)
+ return 0;
+ if (probe_kernel_address((u16 *)pc, opcode))
+ return 0;
+
+ return opcode == AVR32_BUG_OPCODE;
+}
+#endif
+
+asmlinkage void do_illegal_opcode(unsigned long ecr, struct pt_regs *regs)
+{
+ u32 insn;
+ struct undef_hook *hook;
+ void __user *pc;
+ long code;
+
+#ifdef CONFIG_BUG
+ if (!user_mode(regs) && (ecr == ECR_ILLEGAL_OPCODE)) {
+ enum bug_trap_type type;
+
+ type = report_bug(regs->pc, regs);
+ switch (type) {
+ case BUG_TRAP_TYPE_NONE:
+ break;
+ case BUG_TRAP_TYPE_WARN:
+ regs->pc += 2;
+ return;
+ case BUG_TRAP_TYPE_BUG:
+ die("Kernel BUG", regs, SIGKILL);
+ }
+ }
+#endif
+
+ local_irq_enable();
+
+ if (user_mode(regs)) {
+ pc = (void __user *)instruction_pointer(regs);
+ if (get_user(insn, (u32 __user *)pc))
+ goto invalid_area;
+
+ if (ecr == ECR_COPROC_ABSENT && !do_cop_absent(insn))
+ return;
+
+ spin_lock_irq(&undef_lock);
+ list_for_each_entry(hook, &undef_hook, node) {
+ if ((insn & hook->insn_mask) == hook->insn_val) {
+ if (hook->fn(regs, insn) == 0) {
+ spin_unlock_irq(&undef_lock);
+ return;
+ }
+ }
+ }
+ spin_unlock_irq(&undef_lock);
+ }
+
+ switch (ecr) {
+ case ECR_PRIVILEGE_VIOLATION:
+ code = ILL_PRVOPC;
+ break;
+ case ECR_COPROC_ABSENT:
+ code = ILL_COPROC;
+ break;
+ default:
+ code = ILL_ILLOPC;
+ break;
+ }
+
+ _exception(SIGILL, regs, code, regs->pc);
+ return;
+
+invalid_area:
+ _exception(SIGSEGV, regs, SEGV_MAPERR, regs->pc);
+}
+
+asmlinkage void do_fpe(unsigned long ecr, struct pt_regs *regs)
+{
+ /* We have no FPU yet */
+ _exception(SIGILL, regs, ILL_COPROC, regs->pc);
+}
+
+
+void __init trap_init(void)
+{
+
+}
diff --git a/arch/avr32/kernel/vmlinux.lds.S b/arch/avr32/kernel/vmlinux.lds.S
new file mode 100644
index 000000000..a4589176b
--- /dev/null
+++ b/arch/avr32/kernel/vmlinux.lds.S
@@ -0,0 +1,88 @@
+/*
+ * AVR32 linker script for the Linux kernel
+ *
+ * Copyright (C) 2004-2006 Atmel Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#define LOAD_OFFSET 0x00000000
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/cache.h>
+#include <asm/thread_info.h>
+
+OUTPUT_FORMAT("elf32-avr32", "elf32-avr32", "elf32-avr32")
+OUTPUT_ARCH(avr32)
+ENTRY(_start)
+
+/* Big endian */
+jiffies = jiffies_64 + 4;
+
+SECTIONS
+{
+ . = CONFIG_ENTRY_ADDRESS;
+ .init : AT(ADDR(.init) - LOAD_OFFSET) {
+ _text = .;
+ __init_begin = .;
+ _sinittext = .;
+ *(.text.reset)
+ INIT_TEXT
+ /*
+ * .exit.text is discarded at runtime, not
+ * link time, to deal with references from
+ * __bug_table
+ */
+ EXIT_TEXT
+ _einittext = .;
+ . = ALIGN(4);
+ __tagtable_begin = .;
+ *(.taglist.init)
+ __tagtable_end = .;
+ }
+ INIT_DATA_SECTION(16)
+ . = ALIGN(PAGE_SIZE);
+ __init_end = .;
+
+ .text : AT(ADDR(.text) - LOAD_OFFSET) {
+ _evba = .;
+ _stext = .;
+ *(.ex.text)
+ *(.irq.text)
+ KPROBES_TEXT
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ *(.fixup)
+ *(.gnu.warning)
+ _etext = .;
+ } = 0xd703d703
+
+ EXCEPTION_TABLE(4)
+ RODATA
+
+ .data : AT(ADDR(.data) - LOAD_OFFSET) {
+ _data = .;
+ _sdata = .;
+
+ INIT_TASK_DATA(THREAD_SIZE)
+ PAGE_ALIGNED_DATA(PAGE_SIZE);
+ CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
+ *(.data.rel*)
+ DATA_DATA
+ CONSTRUCTORS
+
+ _edata = .;
+ }
+
+ BSS_SECTION(0, 8, 8)
+ _end = .;
+
+ DWARF_DEBUG
+
+ /* When something in the kernel is NOT compiled as a module, the module
+ * cleanup code and data are put into these segments. Both can then be
+ * thrown away, as cleanup code is never called unless it's a module.
+ */
+ DISCARDS
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-04 13:23:59 +0000