arch/score/include/asm/processor.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_SCORE_PROCESSOR_H
   3 #define _ASM_SCORE_PROCESSOR_H
   4
   5 #include <linux/cpumask.h>
   6 #include <linux/threads.h>
   7
   8 #include <asm/segment.h>
   9
  10 struct task_struct;
  11
  12 /*
  13  * System setup and hardware flags..
  14  */
  15 extern void (*cpu_wait)(void);
  16
  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 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  */
  49 struct 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 */