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 long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
  17extern unsigned long thread_saved_pc(struct task_struct *tsk);
  18extern void start_thread(struct pt_regs *regs,
  19                        unsigned long pc, unsigned long sp);
  20extern unsigned long get_wchan(struct task_struct *p);
  21
  22/*
  23 * Return current * instruction pointer ("program counter").
  24 */
  25#define current_text_addr() ({ __label__ _l; _l: &&_l; })
  26
  27#define cpu_relax()             barrier()
  28#define release_thread(thread)  do {} while (0)
  29#define prepare_to_copy(tsk)    do {} while (0)
  30
  31/*
  32 * User space process size: 2GB. This is hardcoded into a few places,
  33 * so don't change it unless you know what you are doing.
  34 */
  35#define TASK_SIZE       0x7fff8000UL
  36
  37/*
  38 * This decides where the kernel will search for a free chunk of vm
  39 * space during mmap's.
  40 */
  41#define TASK_UNMAPPED_BASE      ((TASK_SIZE / 3) & ~(PAGE_SIZE))
  42
  43#ifdef __KERNEL__
  44#define STACK_TOP       TASK_SIZE
  45#define STACK_TOP_MAX   TASK_SIZE
  46#endif
  47
  48/*
  49 * If you change thread_struct remember to change the #defines below too!
  50 */
  51struct thread_struct {
  52        unsigned long reg0, reg2, reg3;
  53        unsigned long reg12, reg13, reg14, reg15, reg16;
  54        unsigned long reg17, reg18, reg19, reg20, reg21;
  55
  56        unsigned long cp0_psr;
  57        unsigned long cp0_ema;          /* Last user fault */
  58        unsigned long cp0_badvaddr;     /* Last user fault */
  59        unsigned long cp0_baduaddr;     /* Last kernel fault accessing USEG */
  60        unsigned long error_code;
  61        unsigned long trap_no;
  62
  63        unsigned long mflags;
  64        unsigned long reg29;
  65
  66        unsigned long single_step;
  67        unsigned long ss_nextcnt;
  68
  69        unsigned long insn1_type;
  70        unsigned long addr1;
  71        unsigned long insn1;
  72
  73        unsigned long insn2_type;
  74        unsigned long addr2;
  75        unsigned long insn2;
  76
  77        mm_segment_t current_ds;
  78};
  79
  80#define INIT_THREAD {                                           \
  81        .reg0                   = 0,                            \
  82        .reg2                   = 0,                            \
  83        .reg3                   = 0,                            \
  84        .reg12                  = 0,                            \
  85        .reg13                  = 0,                            \
  86        .reg14                  = 0,                            \
  87        .reg15                  = 0,                            \
  88        .reg16                  = 0,                            \
  89        .reg17                  = 0,                            \
  90        .reg18                  = 0,                            \
  91        .reg19                  = 0,                            \
  92        .reg20                  = 0,                            \
  93        .reg21                  = 0,                            \
  94        .cp0_psr                = 0,                            \
  95        .error_code             = 0,                            \
  96        .trap_no                = 0,                            \
  97}
  98
  99#define kstk_tos(tsk)           \
 100        ((unsigned long)task_stack_page(tsk) + THREAD_SIZE - 32)
 101#define task_pt_regs(tsk)       ((struct pt_regs *)kstk_tos(tsk) - 1)
 102
 103#define KSTK_EIP(tsk)           (task_pt_regs(tsk)->cp0_epc)
 104#define KSTK_ESP(tsk)           (task_pt_regs(tsk)->regs[29])
 105
 106#endif /* _ASM_SCORE_PROCESSOR_H */
 107