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 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 */ 50struct 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 */ 106