623b0355d5
* Use generic BUG() handling
* Remove some useless debug statements
* Use a common function _exception() to send signals or oops when
an exception can't be handled. This makes sure init doesn't
enter an infinite exception loop as well. Borrowed from powerpc.
* Add some basic exception tracing support to the page fault code.
* Rework dump_stack(), show_regs() and friends and move everything
into process.c
* Print information about configuration options and chip type when
oopsing
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
157 lines
3.6 KiB
C
157 lines
3.6 KiB
C
/*
|
|
* 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
|
|
|
|
#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;
|
|
|
|
struct cache_info icache;
|
|
struct cache_info dcache;
|
|
};
|
|
|
|
extern struct avr32_cpuinfo boot_cpu_data;
|
|
|
|
#ifdef CONFIG_SMP
|
|
extern struct avr32_cpuinfo cpu_data[];
|
|
#define current_cpu_data cpu_data[smp_processor_id()]
|
|
#else
|
|
#define cpu_data (&boot_cpu_data)
|
|
#define current_cpu_data boot_cpu_data
|
|
#endif
|
|
|
|
/* 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_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 { \
|
|
set_fs(USER_DS); \
|
|
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 *);
|
|
|
|
/* Create a kernel thread without removing it from tasklists */
|
|
extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
|
|
|
|
/* Prepare to copy thread state - unlazy all lazy status */
|
|
#define prepare_to_copy(tsk) do { } while(0)
|
|
|
|
/* 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 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 */
|