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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 | /* $Id: stackframe.h,v 1.3 1999/12/04 03:59:12 ralf Exp $ * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 1994, 1995, 1996, 1999 Ralf Baechle * Copyright (C) 1994, 1995, 1996 Paul M. Antoine. * Copyright (C) 1999 Silicon Graphics, Inc. */ #ifndef _ASM_STACKFRAME_H #define _ASM_STACKFRAME_H #include <linux/config.h> #include <asm/asm.h> #include <asm/offset.h> #include <asm/processor.h> #include <asm/addrspace.h> #ifdef _LANGUAGE_C #define __str2(x) #x #define __str(x) __str2(x) #define save_static(frame) \ __asm__ __volatile__( \ "sd\t$16,"__str(PT_R16)"(%0)\n\t" \ "sd\t$17,"__str(PT_R17)"(%0)\n\t" \ "sd\t$18,"__str(PT_R18)"(%0)\n\t" \ "sd\t$19,"__str(PT_R19)"(%0)\n\t" \ "sd\t$20,"__str(PT_R20)"(%0)\n\t" \ "sd\t$21,"__str(PT_R21)"(%0)\n\t" \ "sd\t$22,"__str(PT_R22)"(%0)\n\t" \ "sd\t$23,"__str(PT_R23)"(%0)\n\t" \ "sd\t$30,"__str(PT_R30)"(%0)\n\t" \ : /* No outputs */ \ : "r" (frame)) #endif /* _LANGUAGE_C */ #ifdef _LANGUAGE_ASSEMBLY .macro SAVE_AT .set push .set noat sd $1, PT_R1(sp) .set pop .endm .macro SAVE_TEMP mfhi v1 sd $8, PT_R8(sp) sd $9, PT_R9(sp) sd v1, PT_HI(sp) mflo v1 sd $10, PT_R10(sp) sd $11, PT_R11(sp) sd v1, PT_LO(sp) sd $12, PT_R12(sp) sd $13, PT_R13(sp) sd $14, PT_R14(sp) sd $15, PT_R15(sp) sd $24, PT_R24(sp) .endm .macro SAVE_STATIC sd $16, PT_R16(sp) sd $17, PT_R17(sp) sd $18, PT_R18(sp) sd $19, PT_R19(sp) sd $20, PT_R20(sp) sd $21, PT_R21(sp) sd $22, PT_R22(sp) sd $23, PT_R23(sp) sd $30, PT_R30(sp) .endm .macro SAVE_SOME .set push .set reorder mfc0 k0, CP0_STATUS sll k0, 3 /* extract cu0 bit */ .set noreorder bltz k0, 8f move k1, sp .set reorder /* Called from user mode, new stack. */ #ifndef CONFIG_SMP lui k1, %hi(kernelsp) ld k1, %lo(kernelsp)(k1) #else mfc0 k0, CP0_WATCHLO mfc0 k1, CP0_WATCHHI dsll32 k0, k0, 0 /* Get rid of sign extension */ dsrl32 k0, k0, 0 /* Get rid of sign extension */ dsll32 k1, k1, 0 or k1, k1, k0 li k0, K0BASE or k1, k1, k0 daddiu k1, k1, KERNEL_STACK_SIZE-32 #endif 8: move k0, sp dsubu sp, k1, PT_SIZE sd k0, PT_R29(sp) sd $3, PT_R3(sp) sd $0, PT_R0(sp) dmfc0 v1, CP0_STATUS sd $2, PT_R2(sp) sd v1, PT_STATUS(sp) sd $4, PT_R4(sp) dmfc0 v1, CP0_CAUSE sd $5, PT_R5(sp) sd v1, PT_CAUSE(sp) sd $6, PT_R6(sp) dmfc0 v1, CP0_EPC sd $7, PT_R7(sp) sd v1, PT_EPC(sp) sd $25, PT_R25(sp) sd $28, PT_R28(sp) sd $31, PT_R31(sp) ori $28, sp, 0x3fff xori $28, 0x3fff .set pop .endm .macro SAVE_ALL SAVE_SOME SAVE_AT SAVE_TEMP SAVE_STATIC .endm .macro RESTORE_AT .set push .set noat ld $1, PT_R1(sp) .set pop .endm .macro RESTORE_SP ld sp, PT_R29(sp) .endm .macro RESTORE_TEMP ld $24, PT_LO(sp) ld $8, PT_R8(sp) ld $9, PT_R9(sp) mtlo $24 ld $24, PT_HI(sp) ld $10, PT_R10(sp) ld $11, PT_R11(sp) mthi $24 ld $12, PT_R12(sp) ld $13, PT_R13(sp) ld $14, PT_R14(sp) ld $15, PT_R15(sp) ld $24, PT_R24(sp) .endm .macro RESTORE_STATIC ld $16, PT_R16(sp) ld $17, PT_R17(sp) ld $18, PT_R18(sp) ld $19, PT_R19(sp) ld $20, PT_R20(sp) ld $21, PT_R21(sp) ld $22, PT_R22(sp) ld $23, PT_R23(sp) ld $30, PT_R30(sp) .endm .macro RESTORE_SOME .set push .set reorder mfc0 t0, CP0_STATUS .set pop ori t0, 0x1f xori t0, 0x1f mtc0 t0, CP0_STATUS li v1, 0xff00 and t0, v1 ld v0, PT_STATUS(sp) nor v1, $0, v1 and v0, v1 or v0, t0 dmtc0 v0, CP0_STATUS ld v1, PT_EPC(sp) dmtc0 v1, CP0_EPC ld $31, PT_R31(sp) ld $28, PT_R28(sp) ld $25, PT_R25(sp) ld $7, PT_R7(sp) ld $6, PT_R6(sp) ld $5, PT_R5(sp) ld $4, PT_R4(sp) ld $3, PT_R3(sp) ld $2, PT_R2(sp) .endm .macro RESTORE_ALL RESTORE_SOME RESTORE_AT RESTORE_TEMP RESTORE_STATIC RESTORE_SP .endm /* * Move to kernel mode and disable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro CLI mfc0 t0, CP0_STATUS li t1, ST0_CU0|0x1f or t0, t1 xori t0, 0x1f mtc0 t0, CP0_STATUS .endm /* * Move to kernel mode and enable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro STI mfc0 t0, CP0_STATUS li t1, ST0_CU0 | 0x1f or t0, t1 xori t0, 0x1e mtc0 t0, CP0_STATUS .endm /* * Just move to kernel mode and leave interrupts as they are. * Set cp0 enable bit as sign that we're running on the kernel stack */ .macro KMODE mfc0 t0, CP0_STATUS li t1, ST0_CU0 | 0x1e or t0, t1 xori t0, 0x1e mtc0 t0, CP0_STATUS .endm #endif /* _LANGUAGE_ASSEMBLY */ #endif /* _ASM_STACKFRAME_H */ |