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
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.
10 #ifndef _ASM_STACKFRAME_H
11 #define _ASM_STACKFRAME_H
13 #include <linux/config.h>
14 #include <linux/threads.h>
17 #include <asm/mipsregs.h>
18 #include <asm/asm-offsets.h>
35 LONG_S $10, PT_R10(sp)
36 LONG_S $11, PT_R11(sp)
38 LONG_S $12, PT_R12(sp)
39 LONG_S $13, PT_R13(sp)
40 LONG_S $14, PT_R14(sp)
41 LONG_S $15, PT_R15(sp)
42 LONG_S $24, PT_R24(sp)
46 LONG_S $16, PT_R16(sp)
47 LONG_S $17, PT_R17(sp)
48 LONG_S $18, PT_R18(sp)
49 LONG_S $19, PT_R19(sp)
50 LONG_S $20, PT_R20(sp)
51 LONG_S $21, PT_R21(sp)
52 LONG_S $22, PT_R22(sp)
53 LONG_S $23, PT_R23(sp)
54 LONG_S $30, PT_R30(sp)
58 .macro get_saved_sp /* SMP variation */
65 LONG_L k1, %lo(kernelsp)(k1)
67 #if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
70 lui k0, %hi(pgd_current)
71 addiu k0, %lo(pgd_current)
75 LONG_L k1, %lo(kernelsp)(k1)
77 #if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
81 LONG_L k1, kernelsp(k1)
85 .macro set_saved_sp stackp temp temp2
87 mfc0 \temp, CP0_CONTEXT
90 LONG_S \stackp, kernelsp(\temp)
92 #if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
95 lui \temp2, %hi(kernelsp)
97 LONG_S \stackp, %lo(kernelsp)(\temp)
99 #if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
102 LONG_S \stackp, kernelsp(\temp)
106 .macro get_saved_sp /* Uniprocessor variation */
107 lui k1, %hi(kernelsp)
108 LONG_L k1, %lo(kernelsp)(k1)
111 .macro set_saved_sp stackp temp temp2
112 LONG_S \stackp, kernelsp
121 sll k0, 3 /* extract cu0 bit */
126 /* Called from user mode, new stack. */
129 PTR_SUBU sp, k1, PT_SIZE
130 LONG_S k0, PT_R29(sp)
135 LONG_S v1, PT_STATUS(sp)
139 LONG_S v1, PT_CAUSE(sp)
147 LONG_S v1, PT_EPC(sp)
148 LONG_S $25, PT_R25(sp)
149 LONG_S $28, PT_R28(sp)
150 LONG_S $31, PT_R31(sp)
151 ori $28, sp, _THREAD_MASK
152 xori $28, _THREAD_MASK
171 LONG_L $24, PT_LO(sp)
177 LONG_L $24, PT_HI(sp)
178 LONG_L $10, PT_R10(sp)
179 LONG_L $11, PT_R11(sp)
181 LONG_L $12, PT_R12(sp)
182 LONG_L $13, PT_R13(sp)
183 LONG_L $14, PT_R14(sp)
184 LONG_L $15, PT_R15(sp)
185 LONG_L $24, PT_R24(sp)
188 .macro RESTORE_STATIC
189 LONG_L $16, PT_R16(sp)
190 LONG_L $17, PT_R17(sp)
191 LONG_L $18, PT_R18(sp)
192 LONG_L $19, PT_R19(sp)
193 LONG_L $20, PT_R20(sp)
194 LONG_L $21, PT_R21(sp)
195 LONG_L $22, PT_R22(sp)
196 LONG_L $23, PT_R23(sp)
197 LONG_L $30, PT_R30(sp)
200 #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
212 LONG_L v0, PT_STATUS(sp)
217 LONG_L $31, PT_R31(sp)
218 LONG_L $28, PT_R28(sp)
219 LONG_L $25, PT_R25(sp)
233 .macro RESTORE_SP_AND_RET
236 LONG_L k0, PT_EPC(sp)
237 LONG_L sp, PT_R29(sp)
255 LONG_L v0, PT_STATUS(sp)
260 LONG_L v1, PT_EPC(sp)
262 LONG_L $31, PT_R31(sp)
263 LONG_L $28, PT_R28(sp)
264 LONG_L $25, PT_R25(sp)
278 .macro RESTORE_SP_AND_RET
279 LONG_L sp, PT_R29(sp)
288 LONG_L sp, PT_R29(sp)
299 .macro RESTORE_ALL_AND_RET
308 * Move to kernel mode and disable interrupts.
309 * Set cp0 enable bit as sign that we're running on the kernel stack
313 li t1, ST0_CU0 | 0x1f
321 * Move to kernel mode and enable interrupts.
322 * Set cp0 enable bit as sign that we're running on the kernel stack
326 li t1, ST0_CU0 | 0x1f
334 * Just move to kernel mode and leave interrupts as they are.
335 * Set cp0 enable bit as sign that we're running on the kernel stack
339 li t1, ST0_CU0 | 0x1e
346 #endif /* _ASM_STACKFRAME_H */