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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 | /* * 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, 2001 Ralf Baechle * Copyright (C) 1994, 1995, 1996 Paul M. Antoine. */ #ifndef __ASM_STACKFRAME_H #define __ASM_STACKFRAME_H #include <asm/addrspace.h> #include <asm/mipsregs.h> #include <asm/processor.h> #include <asm/asm.h> #include <asm/offset.h> #include <linux/config.h> #define SAVE_AT \ .set push; \ .set noat; \ sw $1, PT_R1(sp); \ .set pop #define SAVE_TEMP \ mfhi v1; \ sw $8, PT_R8(sp); \ sw $9, PT_R9(sp); \ sw v1, PT_HI(sp); \ mflo v1; \ sw $10,PT_R10(sp); \ sw $11, PT_R11(sp); \ sw v1, PT_LO(sp); \ sw $12, PT_R12(sp); \ sw $13, PT_R13(sp); \ sw $14, PT_R14(sp); \ sw $15, PT_R15(sp); \ sw $24, PT_R24(sp) #define SAVE_STATIC \ sw $16, PT_R16(sp); \ sw $17, PT_R17(sp); \ sw $18, PT_R18(sp); \ sw $19, PT_R19(sp); \ sw $20, PT_R20(sp); \ sw $21, PT_R21(sp); \ sw $22, PT_R22(sp); \ sw $23, PT_R23(sp); \ sw $30, PT_R30(sp) #define __str2(x) #x #define __str(x) __str2(x) #define save_static_function(symbol) \ __asm__ ( \ ".globl\t" #symbol "\n\t" \ ".align\t2\n\t" \ ".type\t" #symbol ", @function\n\t" \ ".ent\t" #symbol ", 0\n" \ #symbol":\n\t" \ ".frame\t$29, 0, $31\n\t" \ "sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \ "sw\t$17,"__str(PT_R17)"($29)\n\t" \ "sw\t$18,"__str(PT_R18)"($29)\n\t" \ "sw\t$19,"__str(PT_R19)"($29)\n\t" \ "sw\t$20,"__str(PT_R20)"($29)\n\t" \ "sw\t$21,"__str(PT_R21)"($29)\n\t" \ "sw\t$22,"__str(PT_R22)"($29)\n\t" \ "sw\t$23,"__str(PT_R23)"($29)\n\t" \ "sw\t$30,"__str(PT_R30)"($29)\n\t" \ ".end\t" #symbol "\n\t" \ ".size\t" #symbol",. - " #symbol) /* Used in declaration of save_static functions. */ #define static_unused static __attribute__((unused)) #ifdef CONFIG_SMP # define GET_SAVED_SP \ mfc0 k0, CP0_CONTEXT; \ lui k1, %hi(kernelsp); \ srl k0, k0, 23; \ sll k0, k0, 2; \ addu k1, k0; \ lw k1, %lo(kernelsp)(k1); #else # define GET_SAVED_SP \ lui k1, %hi(kernelsp); \ lw k1, %lo(kernelsp)(k1); #endif #define 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. */ \ GET_SAVED_SP \ 8: \ move k0, sp; \ subu sp, k1, PT_SIZE; \ sw k0, PT_R29(sp); \ sw $3, PT_R3(sp); \ sw $0, PT_R0(sp); \ mfc0 v1, CP0_STATUS; \ sw $2, PT_R2(sp); \ sw v1, PT_STATUS(sp); \ sw $4, PT_R4(sp); \ mfc0 v1, CP0_CAUSE; \ sw $5, PT_R5(sp); \ sw v1, PT_CAUSE(sp); \ sw $6, PT_R6(sp); \ mfc0 v1, CP0_EPC; \ sw $7, PT_R7(sp); \ sw v1, PT_EPC(sp); \ sw $25, PT_R25(sp); \ sw $28, PT_R28(sp); \ sw $31, PT_R31(sp); \ ori $28, sp, 0x1fff; \ xori $28, 0x1fff; \ .set pop #define SAVE_ALL \ SAVE_SOME; \ SAVE_AT; \ SAVE_TEMP; \ SAVE_STATIC #define RESTORE_AT \ .set push; \ .set noat; \ lw $1, PT_R1(sp); \ .set pop; #define RESTORE_TEMP \ lw $24, PT_LO(sp); \ lw $8, PT_R8(sp); \ lw $9, PT_R9(sp); \ mtlo $24; \ lw $24, PT_HI(sp); \ lw $10,PT_R10(sp); \ lw $11, PT_R11(sp); \ mthi $24; \ lw $12, PT_R12(sp); \ lw $13, PT_R13(sp); \ lw $14, PT_R14(sp); \ lw $15, PT_R15(sp); \ lw $24, PT_R24(sp) #define RESTORE_STATIC \ lw $16, PT_R16(sp); \ lw $17, PT_R17(sp); \ lw $18, PT_R18(sp); \ lw $19, PT_R19(sp); \ lw $20, PT_R20(sp); \ lw $21, PT_R21(sp); \ lw $22, PT_R22(sp); \ lw $23, PT_R23(sp); \ lw $30, PT_R30(sp) #if defined(CONFIG_CPU_R3000) #define 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; \ lw v0, PT_STATUS(sp); \ nor v1, $0, v1; \ and v0, v1; \ or v0, t0; \ mtc0 v0, CP0_STATUS; \ lw $31, PT_R31(sp); \ lw $28, PT_R28(sp); \ lw $25, PT_R25(sp); \ lw $7, PT_R7(sp); \ lw $6, PT_R6(sp); \ lw $5, PT_R5(sp); \ lw $4, PT_R4(sp); \ lw $3, PT_R3(sp); \ lw $2, PT_R2(sp) #define RESTORE_SP_AND_RET \ .set push; \ .set noreorder; \ lw k0, PT_EPC(sp); \ lw sp, PT_R29(sp); \ jr k0; \ rfe; \ .set pop #else #define 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; \ lw v0, PT_STATUS(sp); \ nor v1, $0, v1; \ and v0, v1; \ or v0, t0; \ mtc0 v0, CP0_STATUS; \ lw v1, PT_EPC(sp); \ mtc0 v1, CP0_EPC; \ lw $31, PT_R31(sp); \ lw $28, PT_R28(sp); \ lw $25, PT_R25(sp); \ lw $7, PT_R7(sp); \ lw $6, PT_R6(sp); \ lw $5, PT_R5(sp); \ lw $4, PT_R4(sp); \ lw $3, PT_R3(sp); \ lw $2, PT_R2(sp) #define RESTORE_SP_AND_RET \ lw sp, PT_R29(sp); \ .set mips3; \ eret; \ .set mips0 #endif #define RESTORE_SP \ lw sp, PT_R29(sp); \ #define RESTORE_ALL \ RESTORE_SOME; \ RESTORE_AT; \ RESTORE_TEMP; \ RESTORE_STATIC; \ RESTORE_SP #define RESTORE_ALL_AND_RET \ RESTORE_SOME; \ RESTORE_AT; \ RESTORE_TEMP; \ RESTORE_STATIC; \ RESTORE_SP_AND_RET /* * Move to kernel mode and disable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */ #define CLI \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1f; \ or t0,t1; \ xori t0,0x1f; \ mtc0 t0,CP0_STATUS /* * Move to kernel mode and enable interrupts. * Set cp0 enable bit as sign that we're running on the kernel stack */ #define STI \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1f; \ or t0,t1; \ xori t0,0x1e; \ mtc0 t0,CP0_STATUS /* * 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 */ #define KMODE \ mfc0 t0,CP0_STATUS; \ li t1,ST0_CU0|0x1e; \ or t0,t1; \ xori t0,0x1e; \ mtc0 t0,CP0_STATUS #endif /* __ASM_STACKFRAME_H */ |