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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 | /* $Id: processor.h,v 1.83 2001/10/08 09:32:13 davem Exp $ * include/asm-sparc/processor.h * * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu) */ #ifndef __ASM_SPARC_PROCESSOR_H #define __ASM_SPARC_PROCESSOR_H /* * Sparc32 implementation of macro that returns current * instruction pointer ("program counter"). */ #define current_text_addr() ({ void *pc; __asm__("sethi %%hi(1f), %0; or %0, %%lo(1f), %0;\n1:" : "=r" (pc)); pc; }) #include <linux/a.out.h> #include <asm/psr.h> #include <asm/ptrace.h> #include <asm/head.h> #include <asm/signal.h> #include <asm/segment.h> #include <asm/btfixup.h> #include <asm/page.h> #include <asm/atomic.h> /* * Bus types */ #define EISA_bus 0 #define EISA_bus__is_a_macro /* for versions in ksyms.c */ #define MCA_bus 0 #define MCA_bus__is_a_macro /* for versions in ksyms.c */ /* * The sparc has no problems with write protection */ #define wp_works_ok 1 #define wp_works_ok__is_a_macro /* for versions in ksyms.c */ /* Whee, this is STACK_TOP + PAGE_SIZE and the lowest kernel address too... * That one page is used to protect kernel from intruders, so that * we can make our access_ok test faster */ #define TASK_SIZE PAGE_OFFSET struct fpq { unsigned long *insn_addr; unsigned long insn; }; typedef struct { int seg; } mm_segment_t; /* The Sparc processor specific thread struct. */ struct thread_struct { unsigned long uwinmask __attribute__ ((aligned (8))); struct pt_regs *kregs; /* Context switch saved kernel state. */ unsigned long ksp __attribute__ ((aligned (8))); unsigned long kpc; unsigned long kpsr; unsigned long kwim; /* Special child fork kpsr/kwim values. */ unsigned long fork_kpsr __attribute__ ((aligned (8))); unsigned long fork_kwim; /* A place to store user windows and stack pointers * when the stack needs inspection. */ #define NSWINS 8 struct reg_window reg_window[NSWINS] __attribute__ ((aligned (8))); unsigned long rwbuf_stkptrs[NSWINS] __attribute__ ((aligned (8))); unsigned long w_saved; /* Floating point regs */ unsigned long float_regs[32] __attribute__ ((aligned (8))); unsigned long fsr; unsigned long fpqdepth; struct fpq fpqueue[16]; unsigned long flags; mm_segment_t current_ds; struct exec core_exec; /* just what it says. */ int new_signal; atomic_t refcount; /* used for sun4c only */ }; #define SPARC_FLAG_KTHREAD 0x1 /* task is a kernel thread */ #define SPARC_FLAG_UNALIGNED 0x2 /* is allowed to do unaligned accesses */ #define INIT_THREAD { \ /* uwinmask, kregs, ksp, kpc, kpsr, kwim */ \ 0, 0, 0, 0, 0, 0, \ /* fork_kpsr, fork_kwim */ \ 0, 0, \ /* reg_window */ \ { { { 0, }, { 0, } }, }, \ /* rwbuf_stkptrs */ \ { 0, 0, 0, 0, 0, 0, 0, 0, }, \ /* w_saved */ \ 0, \ /* FPU regs */ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }, \ /* FPU status, FPU qdepth, FPU queue */ \ 0, 0, { { 0, 0, }, }, \ /* flags, current_ds, */ \ SPARC_FLAG_KTHREAD, KERNEL_DS, \ /* core_exec */ \ { 0, }, \ /* new_signal */ \ 0, \ } /* Return saved PC of a blocked thread. */ extern __inline__ unsigned long thread_saved_pc(struct thread_struct *t) { return t->kpc; } /* Do necessary setup to start up a newly executed thread. */ extern __inline__ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp) { register unsigned long zero asm("g1"); regs->psr = (regs->psr & (PSR_CWP)) | PSR_S; regs->pc = ((pc & (~3)) - 4); regs->npc = regs->pc + 4; regs->y = 0; zero = 0; __asm__ __volatile__("std\t%%g0, [%0 + %3 + 0x00]\n\t" "std\t%%g0, [%0 + %3 + 0x08]\n\t" "std\t%%g0, [%0 + %3 + 0x10]\n\t" "std\t%%g0, [%0 + %3 + 0x18]\n\t" "std\t%%g0, [%0 + %3 + 0x20]\n\t" "std\t%%g0, [%0 + %3 + 0x28]\n\t" "std\t%%g0, [%0 + %3 + 0x30]\n\t" "st\t%1, [%0 + %3 + 0x38]\n\t" "st\t%%g0, [%0 + %3 + 0x3c]" : : "r" (regs), "r" (sp - REGWIN_SZ), "r" (zero), "i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); } /* Free all resources held by a thread. */ #define release_thread(tsk) do { } while(0) extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); #define copy_segments(tsk, mm) do { } while (0) #define release_segments(mm) do { } while (0) #define get_wchan(__TSK) \ ({ extern void scheduling_functions_start_here(void); \ extern void scheduling_functions_end_here(void); \ unsigned long pc, fp, bias = 0; \ unsigned long task_base = (unsigned long) (__TSK); \ unsigned long __ret = 0; \ struct reg_window *rw; \ int count = 0; \ if (!(__TSK) || (__TSK) == current || \ (__TSK)->state == TASK_RUNNING) \ goto __out; \ fp = (__TSK)->thread.ksp + bias; \ do { \ /* Bogus frame pointer? */ \ if (fp < (task_base + sizeof(struct task_struct)) || \ fp >= (task_base + (2 * PAGE_SIZE))) \ break; \ rw = (struct reg_window *) fp; \ pc = rw->ins[7]; \ if (pc < ((unsigned long) scheduling_functions_start_here) || \ pc >= ((unsigned long) scheduling_functions_end_here)) { \ __ret = pc; \ goto __out; \ } \ fp = rw->ins[6] + bias; \ } while (++count < 16); \ __out: __ret; \ }) #define KSTK_EIP(tsk) ((tsk)->thread.kregs->pc) #define KSTK_ESP(tsk) ((tsk)->thread.kregs->u_regs[UREG_FP]) #ifdef __KERNEL__ #define THREAD_SIZE (2*PAGE_SIZE) extern struct task_struct *last_task_used_math; /* Allocation and freeing of basic task resources. */ BTFIXUPDEF_CALL(struct task_struct *, alloc_task_struct, void) BTFIXUPDEF_CALL(void, free_task_struct, struct task_struct *) BTFIXUPDEF_CALL(void, get_task_struct, struct task_struct *) #define alloc_task_struct() BTFIXUP_CALL(alloc_task_struct)() #define free_task_struct(tsk) BTFIXUP_CALL(free_task_struct)(tsk) #define get_task_struct(tsk) BTFIXUP_CALL(get_task_struct)(tsk) #define init_task (init_task_union.task) #define init_stack (init_task_union.stack) #define cpu_relax() do { } while (0) #endif #endif /* __ASM_SPARC_PROCESSOR_H */ |