Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/include/asm-mips64/stackframe.h
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
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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, 1995, 1996, 1999 Ralf Baechle 7 * Copyright (C) 1994, 1995, 1996 Paul M. Antoine. 8 * Copyright (C) 1999 Silicon Graphics, Inc. 9 */ 10 #ifndef _ASM_STACKFRAME_H 11 #define _ASM_STACKFRAME_H 12 13 #include <linux/config.h> 14 #include <linux/threads.h> 15 16 #include <asm/asm.h> 17 #include <asm/offset.h> 18 #include <asm/processor.h> 19 #include <asm/addrspace.h> 20 21 #ifndef __ASSEMBLY__ 22 23 #define __str2(x) #x 24 #define __str(x) __str2(x) 25 26 #define save_static(frame) \ 27 __asm__ __volatile__( \ 28 "sd\t$16,"__str(PT_R16)"(%0)\n\t" \ 29 "sd\t$17,"__str(PT_R17)"(%0)\n\t" \ 30 "sd\t$18,"__str(PT_R18)"(%0)\n\t" \ 31 "sd\t$19,"__str(PT_R19)"(%0)\n\t" \ 32 "sd\t$20,"__str(PT_R20)"(%0)\n\t" \ 33 "sd\t$21,"__str(PT_R21)"(%0)\n\t" \ 34 "sd\t$22,"__str(PT_R22)"(%0)\n\t" \ 35 "sd\t$23,"__str(PT_R23)"(%0)\n\t" \ 36 "sd\t$30,"__str(PT_R30)"(%0)\n\t" \ 37 : /* No outputs */ \ 38 : "r" (frame)) 39 40 #endif /* !__ASSEMBLY__ */ 41 42 #ifdef __ASSEMBLY__ 43 44 .macro SAVE_AT 45 .set push 46 .set noat 47 sd $1, PT_R1(sp) 48 .set pop 49 .endm 50 51 .macro SAVE_TEMP 52 mfhi v1 53 sd $8, PT_R8(sp) 54 sd $9, PT_R9(sp) 55 sd v1, PT_HI(sp) 56 mflo v1 57 sd $10, PT_R10(sp) 58 sd $11, PT_R11(sp) 59 sd v1, PT_LO(sp) 60 sd $12, PT_R12(sp) 61 sd $13, PT_R13(sp) 62 sd $14, PT_R14(sp) 63 sd $15, PT_R15(sp) 64 sd $24, PT_R24(sp) 65 .endm 66 67 .macro SAVE_STATIC 68 sd $16, PT_R16(sp) 69 sd $17, PT_R17(sp) 70 sd $18, PT_R18(sp) 71 sd $19, PT_R19(sp) 72 sd $20, PT_R20(sp) 73 sd $21, PT_R21(sp) 74 sd $22, PT_R22(sp) 75 sd $23, PT_R23(sp) 76 sd $30, PT_R30(sp) 77 .endm 78 79 #ifdef CONFIG_SMP 80 .macro get_saved_sp /* SMP variation */ 81 dmfc0 k1, CP0_CONTEXT 82 dsra k1, 23 83 lui k0, %hi(pgd_current) 84 daddiu k0, %lo(pgd_current) 85 dsubu k1, k0 86 lui k0, %hi(kernelsp) 87 daddu k1, k0 88 ld k1, %lo(kernelsp)(k1) 89 .endm 90 91 .macro set_saved_sp stackp temp temp2 92 lw \temp, TASK_PROCESSOR(gp) 93 dsll \temp, 3 94 lui \temp2, %hi(kernelsp) 95 daddu \temp, \temp2 96 sd \stackp, %lo(kernelsp)(\temp) 97 .endm 98 #else 99 .macro get_saved_sp /* Uniprocessor variation */ 100 lui k1, %hi(kernelsp) 101 ld k1, %lo(kernelsp)(k1) 102 .endm 103 104 .macro set_saved_sp stackp temp temp2 105 sd \stackp, kernelsp 106 .endm 107 #endif 108 .macro declare_saved_sp 109 .comm kernelsp, NR_CPUS * 8, 8 110 .endm 111 112 .macro SAVE_SOME 113 .set push 114 .set reorder 115 mfc0 k0, CP0_STATUS 116 sll k0, 3 /* extract cu0 bit */ 117 .set noreorder 118 bltz k0, 8f 119 move k1, sp 120 .set reorder 121 /* Called from user mode, new stack. */ 122 get_saved_sp 123 8: move k0, sp 124 dsubu sp, k1, PT_SIZE 125 sd k0, PT_R29(sp) 126 sd $3, PT_R3(sp) 127 sd $0, PT_R0(sp) 128 mfc0 v1, CP0_STATUS 129 sd $2, PT_R2(sp) 130 sd v1, PT_STATUS(sp) 131 sd $4, PT_R4(sp) 132 mfc0 v1, CP0_CAUSE 133 sd $5, PT_R5(sp) 134 sd v1, PT_CAUSE(sp) 135 sd $6, PT_R6(sp) 136 dmfc0 v1, CP0_EPC 137 sd $7, PT_R7(sp) 138 sd v1, PT_EPC(sp) 139 sd $25, PT_R25(sp) 140 sd $28, PT_R28(sp) 141 sd $31, PT_R31(sp) 142 ori $28, sp, 0x3fff 143 xori $28, 0x3fff 144 .set pop 145 .endm 146 147 .macro SAVE_ALL 148 SAVE_SOME 149 SAVE_AT 150 SAVE_TEMP 151 SAVE_STATIC 152 .endm 153 154 .macro RESTORE_AT 155 .set push 156 .set noat 157 ld $1, PT_R1(sp) 158 .set pop 159 .endm 160 161 .macro RESTORE_SP 162 ld sp, PT_R29(sp) 163 .endm 164 165 .macro RESTORE_TEMP 166 ld $24, PT_LO(sp) 167 ld $8, PT_R8(sp) 168 ld $9, PT_R9(sp) 169 mtlo $24 170 ld $24, PT_HI(sp) 171 ld $10, PT_R10(sp) 172 ld $11, PT_R11(sp) 173 mthi $24 174 ld $12, PT_R12(sp) 175 ld $13, PT_R13(sp) 176 ld $14, PT_R14(sp) 177 ld $15, PT_R15(sp) 178 ld $24, PT_R24(sp) 179 .endm 180 181 .macro RESTORE_STATIC 182 ld $16, PT_R16(sp) 183 ld $17, PT_R17(sp) 184 ld $18, PT_R18(sp) 185 ld $19, PT_R19(sp) 186 ld $20, PT_R20(sp) 187 ld $21, PT_R21(sp) 188 ld $22, PT_R22(sp) 189 ld $23, PT_R23(sp) 190 ld $30, PT_R30(sp) 191 .endm 192 193 .macro RESTORE_SOME 194 .set push 195 .set reorder 196 mfc0 t0, CP0_STATUS 197 .set pop 198 ori t0, 0x1f 199 xori t0, 0x1f 200 mtc0 t0, CP0_STATUS 201 li v1, 0xff00 202 and t0, v1 203 ld v0, PT_STATUS(sp) 204 nor v1, $0, v1 205 and v0, v1 206 or v0, t0 207 mtc0 v0, CP0_STATUS 208 ld v1, PT_EPC(sp) 209 dmtc0 v1, CP0_EPC 210 ld $31, PT_R31(sp) 211 ld $28, PT_R28(sp) 212 ld $25, PT_R25(sp) 213 ld $7, PT_R7(sp) 214 ld $6, PT_R6(sp) 215 ld $5, PT_R5(sp) 216 ld $4, PT_R4(sp) 217 ld $3, PT_R3(sp) 218 ld $2, PT_R2(sp) 219 .endm 220 221 .macro RESTORE_ALL 222 RESTORE_SOME 223 RESTORE_AT 224 RESTORE_TEMP 225 RESTORE_STATIC 226 RESTORE_SP 227 .endm 228 229 /* 230 * Move to kernel mode and disable interrupts. 231 * Set cp0 enable bit as sign that we're running on the kernel stack 232 */ 233 .macro CLI 234 mfc0 t0, CP0_STATUS 235 li t1, ST0_CU0|0x1f 236 or t0, t1 237 xori t0, 0x1f 238 mtc0 t0, CP0_STATUS 239 .endm 240 241 /* 242 * Move to kernel mode and enable interrupts. 243 * Set cp0 enable bit as sign that we're running on the kernel stack 244 */ 245 .macro STI 246 mfc0 t0, CP0_STATUS 247 li t1, ST0_CU0 | 0x1f 248 or t0, t1 249 xori t0, 0x1e 250 mtc0 t0, CP0_STATUS 251 .endm 252 253 /* 254 * Just move to kernel mode and leave interrupts as they are. 255 * Set cp0 enable bit as sign that we're running on the kernel stack 256 */ 257 .macro KMODE 258 mfc0 t0, CP0_STATUS 259 li t1, ST0_CU0 | 0x1e 260 or t0, t1 261 xori t0, 0x1e 262 mtc0 t0, CP0_STATUS 263 .endm 264 265 #endif /* __ASSEMBLY__ */ 266 267 #endif /* _ASM_STACKFRAME_H */
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