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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/include/asm/processor.h
Initial import
Diffstat (limited to 'arch/avr32/include/asm/processor.h')
-rw-r--r--arch/avr32/include/asm/processor.h167
1 files changed, 167 insertions, 0 deletions
diff --git a/arch/avr32/include/asm/processor.h b/arch/avr32/include/asm/processor.h
new file mode 100644
index 000000000..941593c7d
--- /dev/null
+++ b/arch/avr32/include/asm/processor.h
@@ -0,0 +1,167 @@
+/*
+ * 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.
+ */
+#ifndef __ASM_AVR32_PROCESSOR_H
+#define __ASM_AVR32_PROCESSOR_H
+
+#include <asm/page.h>
+#include <asm/cache.h>
+
+#define TASK_SIZE 0x80000000
+
+#ifdef __KERNEL__
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
+#endif
+
+#ifndef __ASSEMBLY__
+
+static inline void *current_text_addr(void)
+{
+ register void *pc asm("pc");
+ return pc;
+}
+
+enum arch_type {
+ ARCH_AVR32A,
+ ARCH_AVR32B,
+ ARCH_MAX
+};
+
+enum cpu_type {
+ CPU_MORGAN,
+ CPU_AT32AP,
+ CPU_MAX
+};
+
+enum tlb_config {
+ TLB_NONE,
+ TLB_SPLIT,
+ TLB_UNIFIED,
+ TLB_INVALID
+};
+
+#define AVR32_FEATURE_RMW (1 << 0)
+#define AVR32_FEATURE_DSP (1 << 1)
+#define AVR32_FEATURE_SIMD (1 << 2)
+#define AVR32_FEATURE_OCD (1 << 3)
+#define AVR32_FEATURE_PCTR (1 << 4)
+#define AVR32_FEATURE_JAVA (1 << 5)
+#define AVR32_FEATURE_FPU (1 << 6)
+
+struct avr32_cpuinfo {
+ struct clk *clk;
+ unsigned long loops_per_jiffy;
+ enum arch_type arch_type;
+ enum cpu_type cpu_type;
+ unsigned short arch_revision;
+ unsigned short cpu_revision;
+ enum tlb_config tlb_config;
+ unsigned long features;
+ u32 device_id;
+
+ struct cache_info icache;
+ struct cache_info dcache;
+};
+
+static inline unsigned int avr32_get_manufacturer_id(struct avr32_cpuinfo *cpu)
+{
+ return (cpu->device_id >> 1) & 0x7f;
+}
+static inline unsigned int avr32_get_product_number(struct avr32_cpuinfo *cpu)
+{
+ return (cpu->device_id >> 12) & 0xffff;
+}
+static inline unsigned int avr32_get_chip_revision(struct avr32_cpuinfo *cpu)
+{
+ return (cpu->device_id >> 28) & 0x0f;
+}
+
+extern struct avr32_cpuinfo boot_cpu_data;
+
+/* No SMP support so far */
+#define current_cpu_data boot_cpu_data
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's
+ */
+#define TASK_UNMAPPED_BASE (PAGE_ALIGN(TASK_SIZE / 3))
+
+#define cpu_relax() barrier()
+#define cpu_relax_lowlatency() cpu_relax()
+#define cpu_sync_pipeline() asm volatile("sub pc, -2" : : : "memory")
+
+struct cpu_context {
+ unsigned long sr;
+ unsigned long pc;
+ unsigned long ksp; /* Kernel stack pointer */
+ unsigned long r7;
+ unsigned long r6;
+ unsigned long r5;
+ unsigned long r4;
+ unsigned long r3;
+ unsigned long r2;
+ unsigned long r1;
+ unsigned long r0;
+};
+
+/* This struct contains the CPU context as stored by switch_to() */
+struct thread_struct {
+ struct cpu_context cpu_context;
+ unsigned long single_step_addr;
+ u16 single_step_insn;
+};
+
+#define INIT_THREAD { \
+ .cpu_context = { \
+ .ksp = sizeof(init_stack) + (long)&init_stack, \
+ }, \
+}
+
+/*
+ * Do necessary setup to start up a newly executed thread.
+ */
+#define start_thread(regs, new_pc, new_sp) \
+ do { \
+ memset(regs, 0, sizeof(*regs)); \
+ regs->sr = MODE_USER; \
+ regs->pc = new_pc & ~1; \
+ regs->sp = new_sp; \
+ } while(0)
+
+struct task_struct;
+
+/* Free all resources held by a thread */
+extern void release_thread(struct task_struct *);
+
+/* Return saved PC of a blocked thread */
+#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
+
+struct pt_regs;
+extern unsigned long get_wchan(struct task_struct *p);
+extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
+extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
+ struct pt_regs *regs, const char *log_lvl);
+
+#define task_pt_regs(p) \
+ ((struct pt_regs *)(THREAD_SIZE + task_stack_page(p)) - 1)
+
+#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
+#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
+
+#define ARCH_HAS_PREFETCH
+
+static inline void prefetch(const void *x)
+{
+ const char *c = x;
+ asm volatile("pref %0" : : "r"(c));
+}
+#define PREFETCH_STRIDE L1_CACHE_BYTES
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_AVR32_PROCESSOR_H */