LXR linux/arch/score/include/asm/processor.h

   1#ifndef _ASM_SCORE_PROCESSOR_H
   2#define _ASM_SCORE_PROCESSOR_H
   3
   4#include <linux/cpumask.h>
   5#include <linux/threads.h>
   6
   7#include <asm/segment.h>
   8
   9struct task_struct;
  10
  11/*
  12 * System setup and hardware flags..
  13 */
  14extern void (*cpu_wait)(void);
  15
  16extern unsigned long thread_saved_pc(struct task_struct *tsk);
  17extern void start_thread(struct pt_regs *regs,
  18                        unsigned long pc, unsigned long sp);
  19extern unsigned long get_wchan(struct task_struct *p);
  20
  21/*
  22 * Return current * instruction pointer ("program counter").
  23 */
  24#define current_text_addr() ({ __label__ _l; _l: &&_l; })
  25
  26#define cpu_relax()             barrier()
  27#define release_thread(thread)  do {} while (0)
  28
  29/*
  30 * User space process size: 2GB. This is hardcoded into a few places,
  31 * so don't change it unless you know what you are doing.
  32 */
  33#define TASK_SIZE       0x7fff8000UL
  34
  35/*
  36 * This decides where the kernel will search for a free chunk of vm
  37 * space during mmap's.
  38 */
  39#define TASK_UNMAPPED_BASE      ((TASK_SIZE / 3) & ~(PAGE_SIZE))
  40
  41#ifdef __KERNEL__
  42#define STACK_TOP       TASK_SIZE
  43#define STACK_TOP_MAX   TASK_SIZE
  44#endif
  45
  46/*
  47 * If you change thread_struct remember to change the #defines below too!
  48 */
  49struct thread_struct {
  50        unsigned long reg0, reg2, reg3;
  51        unsigned long reg12, reg13, reg14, reg15, reg16;
  52        unsigned long reg17, reg18, reg19, reg20, reg21;
  53
  54        unsigned long cp0_psr;
  55        unsigned long cp0_ema;          /* Last user fault */
  56        unsigned long cp0_badvaddr;     /* Last user fault */
  57        unsigned long cp0_baduaddr;     /* Last kernel fault accessing USEG */
  58        unsigned long error_code;
  59        unsigned long trap_no;
  60
  61        unsigned long mflags;
  62        unsigned long reg29;
  63
  64        unsigned long single_step;
  65        unsigned long ss_nextcnt;
  66
  67        unsigned long insn1_type;
  68        unsigned long addr1;
  69        unsigned long insn1;
  70
  71        unsigned long insn2_type;
  72        unsigned long addr2;
  73        unsigned long insn2;
  74
  75        mm_segment_t current_ds;
  76};
  77
  78#define INIT_THREAD {                                           \
  79        .reg0                   = 0,                            \
  80        .reg2                   = 0,                            \
  81        .reg3                   = 0,                            \
  82        .reg12                  = 0,                            \
  83        .reg13                  = 0,                            \
  84        .reg14                  = 0,                            \
  85        .reg15                  = 0,                            \
  86        .reg16                  = 0,                            \
  87        .reg17                  = 0,                            \
  88        .reg18                  = 0,                            \
  89        .reg19                  = 0,                            \
  90        .reg20                  = 0,                            \
  91        .reg21                  = 0,                            \
  92        .cp0_psr                = 0,                            \
  93        .error_code             = 0,                            \
  94        .trap_no                = 0,                            \
  95}
  96
  97#define kstk_tos(tsk)           \
  98        ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
  99#define task_pt_regs(tsk)       ((struct pt_regs *)kstk_tos(tsk) - 1)
 100
 101#define KSTK_EIP(tsk)           (task_pt_regs(tsk)->cp0_epc)
 102#define KSTK_ESP(tsk)           (task_pt_regs(tsk)->regs[29])
 103
 104#endif /* _ASM_SCORE_PROCESSOR_H */
 105