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