1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 1994, 95, 96, 99, 2001 Ralf Baechle 7 * Copyright (C) 1994, 1995, 1996 Paul M. Antoine. 8 * Copyright (C) 1999 Silicon Graphics, Inc. 9 * Copyright (C) 2007 Maciej W. Rozycki 10 */ 11 #ifndef __STACKFRAME_H__ 12 #define __STACKFRAME_H__ 13 14 #include "asm.h" 15 #include "mipsregs.h" 16 17 /* 18 * Stack layout for the INT exception handler 19 * Derived from the stack layout described in asm-mips/stackframe.h 20 * 21 * The first PTRSIZE*6 bytes are argument save space for C subroutines. 22 */ 23 24 //#define PT_R0 (PTRSIZE*6) /* 0 */ 25 #define PT_R0 (0) /* 0 */ 26 #define PT_R1 ((PT_R0) + LONGSIZE) /* 1 */ 27 #define PT_R2 ((PT_R1) + LONGSIZE) /* 2 */ 28 #define PT_R3 ((PT_R2) + LONGSIZE) /* 3 */ 29 #define PT_R4 ((PT_R3) + LONGSIZE) /* 4 */ 30 #define PT_R5 ((PT_R4) + LONGSIZE) /* 5 */ 31 #define PT_R6 ((PT_R5) + LONGSIZE) /* 6 */ 32 #define PT_R7 ((PT_R6) + LONGSIZE) /* 7 */ 33 #define PT_R8 ((PT_R7) + LONGSIZE) /* 8 */ 34 #define PT_R9 ((PT_R8) + LONGSIZE) /* 9 */ 35 #define PT_R10 ((PT_R9) + LONGSIZE) /* 10 */ 36 #define PT_R11 ((PT_R10) + LONGSIZE) /* 11 */ 37 #define PT_R12 ((PT_R11) + LONGSIZE) /* 12 */ 38 #define PT_R13 ((PT_R12) + LONGSIZE) /* 13 */ 39 #define PT_R14 ((PT_R13) + LONGSIZE) /* 14 */ 40 #define PT_R15 ((PT_R14) + LONGSIZE) /* 15 */ 41 #define PT_R16 ((PT_R15) + LONGSIZE) /* 16 */ 42 #define PT_R17 ((PT_R16) + LONGSIZE) /* 17 */ 43 #define PT_R18 ((PT_R17) + LONGSIZE) /* 18 */ 44 #define PT_R19 ((PT_R18) + LONGSIZE) /* 19 */ 45 #define PT_R20 ((PT_R19) + LONGSIZE) /* 20 */ 46 #define PT_R21 ((PT_R20) + LONGSIZE) /* 21 */ 47 #define PT_R22 ((PT_R21) + LONGSIZE) /* 22 */ 48 #define PT_R23 ((PT_R22) + LONGSIZE) /* 23 */ 49 #define PT_R24 ((PT_R23) + LONGSIZE) /* 24 */ 50 #define PT_R25 ((PT_R24) + LONGSIZE) /* 25 */ 51 #define PT_R26 ((PT_R25) + LONGSIZE) /* 26 */ 52 #define PT_R27 ((PT_R26) + LONGSIZE) /* 27 */ 53 #define PT_R28 ((PT_R27) + LONGSIZE) /* 28 */ 54 #define PT_R29 ((PT_R28) + LONGSIZE) /* 29 */ 55 #define PT_R30 ((PT_R29) + LONGSIZE) /* 30 */ 56 #define PT_R31 ((PT_R30) + LONGSIZE) /* 31 */ 57 58 /* 59 * Saved special registers 60 */ 61 #define PT_STATUS ((PT_R31) + LONGSIZE) /* 32 */ 62 #define PT_HI ((PT_STATUS) + LONGSIZE) /* 33 */ 63 #define PT_LO ((PT_HI) + LONGSIZE) /* 34 */ 64 #define PT_BADVADDR ((PT_LO) + LONGSIZE) /* 35 */ 65 #define PT_CAUSE ((PT_BADVADDR) + LONGSIZE) /* 36 */ 66 #define PT_EPC ((PT_CAUSE) + LONGSIZE) /* 37 */ 67 68 #define PT_SIZE ((((PT_EPC) + LONGSIZE) + (PTRSIZE-1)) & ~(PTRSIZE-1)) 69 70 71 .macro SAVE_AT 72 .set push 73 .set noat 74 LONG_S $1, PT_R1(sp) 75 .set pop 76 .endm 77 78 .macro SAVE_TEMP 79 mfhi v1 80 LONG_S $8, PT_R8(sp) 81 LONG_S $9, PT_R9(sp) 82 LONG_S v1, PT_HI(sp) 83 mflo v1 84 LONG_S $10, PT_R10(sp) 85 LONG_S $11, PT_R11(sp) 86 LONG_S v1, PT_LO(sp) 87 LONG_S $12, PT_R12(sp) 88 LONG_S $13, PT_R13(sp) 89 LONG_S $14, PT_R14(sp) 90 LONG_S $15, PT_R15(sp) 91 LONG_S $24, PT_R24(sp) 92 .endm 93 94 .macro SAVE_STATIC 95 LONG_S $16, PT_R16(sp) 96 LONG_S $17, PT_R17(sp) 97 LONG_S $18, PT_R18(sp) 98 LONG_S $19, PT_R19(sp) 99 LONG_S $20, PT_R20(sp) 100 LONG_S $21, PT_R21(sp) 101 LONG_S $22, PT_R22(sp) 102 LONG_S $23, PT_R23(sp) 103 LONG_S $30, PT_R30(sp) 104 .endm 105 106 .macro get_saved_sp 107 nop 108 .endm 109 110 .macro SAVE_SOME 111 .set push 112 .set noat 113 .set reorder 114 move k1, sp 115 8: move k0, sp 116 PTR_SUBU sp, k1, PT_SIZE 117 LONG_S k0, PT_R29(sp) 118 LONG_S $3, PT_R3(sp) 119 LONG_S $0, PT_R0(sp) 120 mfc0 v1, CP0_STATUS 121 LONG_S $2, PT_R2(sp) 122 LONG_S v1, PT_STATUS(sp) 123 LONG_S $4, PT_R4(sp) 124 mfc0 v1, CP0_CAUSE 125 LONG_S $5, PT_R5(sp) 126 LONG_S v1, PT_CAUSE(sp) 127 LONG_S $6, PT_R6(sp) 128 MFC0 v1, CP0_EPC 129 LONG_S $7, PT_R7(sp) 130 LONG_S v1, PT_EPC(sp) 131 LONG_S $25, PT_R25(sp) 132 LONG_S $28, PT_R28(sp) 133 LONG_S $31, PT_R31(sp) 134 .set pop 135 .endm 136 137 .macro SAVE_ALL 138 SAVE_SOME 139 SAVE_AT 140 SAVE_TEMP 141 SAVE_STATIC 142 .endm 143 144 .macro RESTORE_AT 145 .set push 146 .set noat 147 LONG_L $1, PT_R1(sp) 148 .set pop 149 .endm 150 151 .macro RESTORE_TEMP 152 LONG_L $24, PT_LO(sp) 153 LONG_L $8, PT_R8(sp) 154 LONG_L $9, PT_R9(sp) 155 mtlo $24 156 LONG_L $24, PT_HI(sp) 157 LONG_L $10, PT_R10(sp) 158 LONG_L $11, PT_R11(sp) 159 mthi $24 160 LONG_L $12, PT_R12(sp) 161 LONG_L $13, PT_R13(sp) 162 LONG_L $14, PT_R14(sp) 163 LONG_L $15, PT_R15(sp) 164 LONG_L $24, PT_R24(sp) 165 .endm 166 167 .macro RESTORE_STATIC 168 LONG_L $16, PT_R16(sp) 169 LONG_L $17, PT_R17(sp) 170 LONG_L $18, PT_R18(sp) 171 LONG_L $19, PT_R19(sp) 172 LONG_L $20, PT_R20(sp) 173 LONG_L $21, PT_R21(sp) 174 LONG_L $22, PT_R22(sp) 175 LONG_L $23, PT_R23(sp) 176 LONG_L $30, PT_R30(sp) 177 .endm 178 179 .macro RESTORE_SOME 180 .set push 181 .set reorder 182 .set noat 183 LONG_L v0, PT_STATUS(sp) 184 mtc0 v0, CP0_STATUS 185 LONG_L v1, PT_EPC(sp) 186 MTC0 v1, CP0_EPC 187 LONG_L $31, PT_R31(sp) 188 LONG_L $28, PT_R28(sp) 189 LONG_L $25, PT_R25(sp) 190 LONG_L $7, PT_R7(sp) 191 LONG_L $6, PT_R6(sp) 192 LONG_L $5, PT_R5(sp) 193 LONG_L $4, PT_R4(sp) 194 LONG_L $3, PT_R3(sp) 195 LONG_L $2, PT_R2(sp) 196 .set pop 197 .endm 198 199 .macro RESTORE_SP_AND_RET 200 LONG_L sp, PT_R29(sp) 201 .set mips3 202 eret 203 .set mips0 204 .endm 205 206 207 .macro RESTORE_SP 208 LONG_L sp, PT_R29(sp) 209 .endm 210 211 .macro RESTORE_ALL 212 RESTORE_TEMP 213 RESTORE_STATIC 214 RESTORE_AT 215 RESTORE_SOME 216 RESTORE_SP 217 .endm 218 219 .macro RESTORE_ALL_AND_RET 220 RESTORE_TEMP 221 RESTORE_STATIC 222 RESTORE_AT 223 RESTORE_SOME 224 RESTORE_SP_AND_RET 225 .endm 226 227 #endif /* end of __STACKFRAME_H__ */ 228 229