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 */ 106