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