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-rw-r--r--arch/sh/kernel/Makefile1
-rw-r--r--arch/sh/kernel/cpu/sh2/entry.S8
-rw-r--r--arch/sh/kernel/cpu/sh2a/entry.S8
-rw-r--r--arch/sh/kernel/cpu/sh4a/smp-shx3.c2
-rw-r--r--arch/sh/kernel/entry-common.S21
-rw-r--r--arch/sh/kernel/head_32.S13
-rw-r--r--arch/sh/kernel/localtimer.c60
-rw-r--r--arch/sh/kernel/setup.c35
-rw-r--r--arch/sh/kernel/sh_ksyms_32.c3
-rw-r--r--arch/sh/kernel/smp.c26
-rw-r--r--arch/sh/kernel/topology.c4
-rw-r--r--arch/sh/kernel/vmlinux.lds.S1
12 files changed, 89 insertions, 93 deletions
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 2ccf36c82..09040fd07 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -46,6 +46,5 @@ obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
-obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += localtimer.o
ccflags-y := -Werror
diff --git a/arch/sh/kernel/cpu/sh2/entry.S b/arch/sh/kernel/cpu/sh2/entry.S
index c8a4331d9..a1505956e 100644
--- a/arch/sh/kernel/cpu/sh2/entry.S
+++ b/arch/sh/kernel/cpu/sh2/entry.S
@@ -144,9 +144,9 @@ ENTRY(exception_handler)
mov #64,r8
cmp/hs r8,r9
bt interrupt_entry ! vec >= 64 is interrupt
- mov #32,r8
+ mov #31,r8
cmp/hs r8,r9
- bt trap_entry ! 64 > vec >= 32 is trap
+ bt trap_entry ! 64 > vec >= 31 is trap
mov.l 4f,r8
mov r9,r4
@@ -178,9 +178,9 @@ interrupt_entry:
trap_entry:
mov #0x30,r8
- cmp/ge r8,r9 ! vector 0x20-0x2f is systemcall
+ cmp/ge r8,r9 ! vector 0x1f-0x2f is systemcall
bt 1f
- add #-0x10,r9 ! convert SH2 to SH3/4 ABI
+ mov #0x1f,r9 ! convert to unified SH2/3/4 trap number
1:
shll2 r9 ! TRA
bra system_call ! jump common systemcall entry
diff --git a/arch/sh/kernel/cpu/sh2a/entry.S b/arch/sh/kernel/cpu/sh2a/entry.S
index 222742ddc..da77a8ef4 100644
--- a/arch/sh/kernel/cpu/sh2a/entry.S
+++ b/arch/sh/kernel/cpu/sh2a/entry.S
@@ -109,9 +109,9 @@ ENTRY(exception_handler)
mov #64,r8
cmp/hs r8,r9
bt interrupt_entry ! vec >= 64 is interrupt
- mov #32,r8
+ mov #31,r8
cmp/hs r8,r9
- bt trap_entry ! 64 > vec >= 32 is trap
+ bt trap_entry ! 64 > vec >= 31 is trap
mov.l 4f,r8
mov r9,r4
@@ -143,9 +143,9 @@ interrupt_entry:
trap_entry:
mov #0x30,r8
- cmp/ge r8,r9 ! vector 0x20-0x2f is systemcall
+ cmp/ge r8,r9 ! vector 0x1f-0x2f is systemcall
bt 1f
- add #-0x10,r9 ! convert SH2 to SH3/4 ABI
+ mov #0x1f,r9 ! convert to unified SH2/3/4 trap number
1:
shll2 r9 ! TRA
bra system_call ! jump common systemcall entry
diff --git a/arch/sh/kernel/cpu/sh4a/smp-shx3.c b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
index 4a2988087..839612c8a 100644
--- a/arch/sh/kernel/cpu/sh4a/smp-shx3.c
+++ b/arch/sh/kernel/cpu/sh4a/smp-shx3.c
@@ -73,8 +73,6 @@ static void shx3_prepare_cpus(unsigned int max_cpus)
{
int i;
- local_timer_setup(0);
-
BUILD_BUG_ON(SMP_MSG_NR >= 8);
for (i = 0; i < SMP_MSG_NR; i++)
diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index 13047a4fa..c001f782c 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -268,20 +268,29 @@ debug_trap:
* Syscall #: R3
* Arguments #0 to #3: R4--R7
* Arguments #4 to #6: R0, R1, R2
- * TRA: (number of arguments + ABI revision) x 4
+ * TRA: See following table.
*
- * This code also handles delegating other traps to the BIOS/gdb stub
- * according to:
- *
- * Trap number
* (TRA>>2) Purpose
* -------- -------
* 0x00-0x0f original SH-3/4 syscall ABI (not in general use).
* 0x10-0x1f general SH-3/4 syscall ABI.
- * 0x20-0x2f syscall ABI for SH-2 parts.
+ * 0x1f unified SH-2/3/4 syscall ABI (preferred).
+ * 0x20-0x2f original SH-2 syscall ABI.
* 0x30-0x3f debug traps used by the kernel.
* 0x40-0xff Not supported by all parts, so left unhandled.
*
+ * For making system calls, any trap number in the range for the
+ * given cpu model may be used, but the unified trap number 0x1f is
+ * preferred for compatibility with all models.
+ *
+ * The low bits of the trap number were once documented as matching
+ * the number of arguments, but they were never actually used as such
+ * by the kernel. SH-2 originally used its own separate trap range
+ * because several hardware exceptions fell in the range used for the
+ * SH-3/4 syscall ABI.
+ *
+ * This code also handles delegating other traps to the BIOS/gdb stub.
+ *
* Note: When we're first called, the TRA value must be shifted
* right 2 bits in order to get the value that was used as the "trapa"
* argument.
diff --git a/arch/sh/kernel/head_32.S b/arch/sh/kernel/head_32.S
index 7db248936..974bc152c 100644
--- a/arch/sh/kernel/head_32.S
+++ b/arch/sh/kernel/head_32.S
@@ -66,6 +66,10 @@ ENTRY(_stext)
mov #0, r0
ldc r0, r6_bank
#endif
+
+#ifdef CONFIG_OF
+ mov r4, r12 ! Store device tree blob pointer in r12
+#endif
/*
* Prefetch if possible to reduce cache miss penalty.
@@ -314,6 +318,12 @@ ENTRY(_stext)
10:
#endif
+#ifdef CONFIG_OF
+ mov.l 8f, r0 ! Make flat device tree available early.
+ jsr @r0
+ mov r12, r4
+#endif
+
! Additional CPU initialization
mov.l 6f, r0
jsr @r0
@@ -339,6 +349,9 @@ ENTRY(stack_start)
5: .long start_kernel
6: .long cpu_init
7: .long init_thread_union
+#if defined(CONFIG_OF)
+8: .long sh_fdt_init
+#endif
#ifdef CONFIG_PMB
.LPMB_ADDR: .long PMB_ADDR
diff --git a/arch/sh/kernel/localtimer.c b/arch/sh/kernel/localtimer.c
deleted file mode 100644
index cbb7d4636..000000000
--- a/arch/sh/kernel/localtimer.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Dummy local timer
- *
- * Copyright (C) 2008 Paul Mundt
- *
- * cloned from:
- *
- * linux/arch/arm/mach-realview/localtimer.c
- *
- * Copyright (C) 2002 ARM Ltd.
- * All Rights Reserved
- *
- * 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/kernel.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/smp.h>
-#include <linux/jiffies.h>
-#include <linux/percpu.h>
-#include <linux/clockchips.h>
-#include <linux/hardirq.h>
-#include <linux/irq.h>
-
-static DEFINE_PER_CPU(struct clock_event_device, local_clockevent);
-
-/*
- * Used on SMP for either the local timer or SMP_MSG_TIMER
- */
-void local_timer_interrupt(void)
-{
- struct clock_event_device *clk = this_cpu_ptr(&local_clockevent);
-
- irq_enter();
- clk->event_handler(clk);
- irq_exit();
-}
-
-void local_timer_setup(unsigned int cpu)
-{
- struct clock_event_device *clk = &per_cpu(local_clockevent, cpu);
-
- clk->name = "dummy_timer";
- clk->features = CLOCK_EVT_FEAT_ONESHOT |
- CLOCK_EVT_FEAT_PERIODIC |
- CLOCK_EVT_FEAT_DUMMY;
- clk->rating = 400;
- clk->mult = 1;
- clk->broadcast = smp_timer_broadcast;
- clk->cpumask = cpumask_of(cpu);
-
- clockevents_register_device(clk);
-}
-
-void local_timer_stop(unsigned int cpu)
-{
-}
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index de19cfa76..5d34605b5 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -29,6 +29,8 @@
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/of_fdt.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/page.h>
@@ -78,17 +80,17 @@ static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, };
static struct resource code_resource = {
.name = "Kernel code",
- .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+ .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
};
static struct resource data_resource = {
.name = "Kernel data",
- .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+ .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
};
static struct resource bss_resource = {
.name = "Kernel bss",
- .flags = IORESOURCE_BUSY | IORESOURCE_MEM,
+ .flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM,
};
unsigned long memory_start;
@@ -172,6 +174,7 @@ disable:
#endif
}
+#ifndef CONFIG_GENERIC_CALIBRATE_DELAY
void calibrate_delay(void)
{
struct clk *clk = clk_get(NULL, "cpu_clk");
@@ -187,6 +190,7 @@ void calibrate_delay(void)
(loops_per_jiffy/(5000/HZ)) % 100,
loops_per_jiffy);
}
+#endif
void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
unsigned long end_pfn)
@@ -202,7 +206,7 @@ void __init __add_active_range(unsigned int nid, unsigned long start_pfn,
res->name = "System RAM";
res->start = start;
res->end = end - 1;
- res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+ res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
if (request_resource(&iomem_resource, res)) {
pr_err("unable to request memory_resource 0x%lx 0x%lx\n",
@@ -238,6 +242,29 @@ void __init __weak plat_early_device_setup(void)
{
}
+#ifdef CONFIG_OF
+void __ref sh_fdt_init(phys_addr_t dt_phys)
+{
+ static int done = 0;
+ void *dt_virt;
+
+ /* Avoid calling an __init function on secondary cpus. */
+ if (done) return;
+
+ dt_virt = phys_to_virt(dt_phys);
+
+ if (!dt_virt || !early_init_dt_scan(dt_virt)) {
+ pr_crit("Error: invalid device tree blob"
+ " at physical address %p\n", (void *)dt_phys);
+
+ while (true)
+ cpu_relax();
+ }
+
+ done = 1;
+}
+#endif
+
void __init setup_arch(char **cmdline_p)
{
enable_mmu();
diff --git a/arch/sh/kernel/sh_ksyms_32.c b/arch/sh/kernel/sh_ksyms_32.c
index d77f2f6c7..0b30b9dfc 100644
--- a/arch/sh/kernel/sh_ksyms_32.c
+++ b/arch/sh/kernel/sh_ksyms_32.c
@@ -34,6 +34,9 @@ DECLARE_EXPORT(__sdivsi3);
DECLARE_EXPORT(__lshrsi3);
DECLARE_EXPORT(__ashrsi3);
DECLARE_EXPORT(__ashlsi3);
+DECLARE_EXPORT(__lshrsi3_r0);
+DECLARE_EXPORT(__ashrsi3_r0);
+DECLARE_EXPORT(__ashlsi3_r0);
DECLARE_EXPORT(__ashiftrt_r4_6);
DECLARE_EXPORT(__ashiftrt_r4_7);
DECLARE_EXPORT(__ashiftrt_r4_8);
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index de6be008f..38e786084 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -22,6 +22,7 @@
#include <linux/interrupt.h>
#include <linux/sched.h>
#include <linux/atomic.h>
+#include <linux/clockchips.h>
#include <asm/processor.h>
#include <asm/mmu_context.h>
#include <asm/smp.h>
@@ -141,16 +142,13 @@ int __cpu_disable(void)
migrate_irqs();
/*
- * Stop the local timer for this CPU.
- */
- local_timer_stop(cpu);
-
- /*
* Flush user cache and TLB mappings, and then remove this CPU
* from the vm mask set of all processes.
*/
flush_cache_all();
+#ifdef CONFIG_MMU
local_flush_tlb_all();
+#endif
clear_tasks_mm_cpumask(cpu);
@@ -183,8 +181,10 @@ asmlinkage void start_secondary(void)
atomic_inc(&mm->mm_count);
atomic_inc(&mm->mm_users);
current->active_mm = mm;
+#ifdef CONFIG_MMU
enter_lazy_tlb(mm, current);
local_flush_tlb_all();
+#endif
per_cpu_trap_init();
@@ -194,8 +194,6 @@ asmlinkage void start_secondary(void)
local_irq_enable();
- /* Enable local timers */
- local_timer_setup(cpu);
calibrate_delay();
smp_store_cpu_info(cpu);
@@ -203,7 +201,7 @@ asmlinkage void start_secondary(void)
set_cpu_online(cpu, true);
per_cpu(cpu_state, cpu) = CPU_ONLINE;
- cpu_startup_entry(CPUHP_ONLINE);
+ cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
}
extern struct {
@@ -285,7 +283,8 @@ void arch_send_call_function_single_ipi(int cpu)
mp_ops->send_ipi(cpu, SMP_MSG_FUNCTION_SINGLE);
}
-void smp_timer_broadcast(const struct cpumask *mask)
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
+void tick_broadcast(const struct cpumask *mask)
{
int cpu;
@@ -296,9 +295,10 @@ void smp_timer_broadcast(const struct cpumask *mask)
static void ipi_timer(void)
{
irq_enter();
- local_timer_interrupt();
+ tick_receive_broadcast();
irq_exit();
}
+#endif
void smp_message_recv(unsigned int msg)
{
@@ -312,9 +312,11 @@ void smp_message_recv(unsigned int msg)
case SMP_MSG_FUNCTION_SINGLE:
generic_smp_call_function_single_interrupt();
break;
+#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
case SMP_MSG_TIMER:
ipi_timer();
break;
+#endif
default:
printk(KERN_WARNING "SMP %d: %s(): unknown IPI %d\n",
smp_processor_id(), __func__, msg);
@@ -328,6 +330,8 @@ int setup_profiling_timer(unsigned int multiplier)
return 0;
}
+#ifdef CONFIG_MMU
+
static void flush_tlb_all_ipi(void *info)
{
local_flush_tlb_all();
@@ -467,3 +471,5 @@ void flush_tlb_one(unsigned long asid, unsigned long vaddr)
smp_call_function(flush_tlb_one_ipi, (void *)&fd, 1);
local_flush_tlb_one(asid, vaddr);
}
+
+#endif
diff --git a/arch/sh/kernel/topology.c b/arch/sh/kernel/topology.c
index 772caffba..c82912a61 100644
--- a/arch/sh/kernel/topology.c
+++ b/arch/sh/kernel/topology.c
@@ -21,7 +21,7 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices);
cpumask_t cpu_core_map[NR_CPUS];
EXPORT_SYMBOL(cpu_core_map);
-static cpumask_t cpu_coregroup_map(unsigned int cpu)
+static cpumask_t cpu_coregroup_map(int cpu)
{
/*
* Presently all SH-X3 SMP cores are multi-cores, so just keep it
@@ -30,7 +30,7 @@ static cpumask_t cpu_coregroup_map(unsigned int cpu)
return *cpu_possible_mask;
}
-const struct cpumask *cpu_coregroup_mask(unsigned int cpu)
+const struct cpumask *cpu_coregroup_mask(int cpu)
{
return &cpu_core_map[cpu];
}
diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
index db88cbf9e..235a41019 100644
--- a/arch/sh/kernel/vmlinux.lds.S
+++ b/arch/sh/kernel/vmlinux.lds.S
@@ -39,6 +39,7 @@ SECTIONS
LOCK_TEXT
KPROBES_TEXT
IRQENTRY_TEXT
+ SOFTIRQENTRY_TEXT
*(.fixup)
*(.gnu.warning)
_etext = .; /* End of text section */
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-06 02:00:08 +0000