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 */
64 LONG_L k1, %lo(kernelsp)(k1)
68 lui k0, %highest(kernelsp)
70 daddiu k0, %higher(kernelsp)
72 daddiu k0, %hi(kernelsp)
75 LONG_L k1, %lo(kernelsp)(k1)
79 .macro set_saved_sp stackp temp temp2
81 mfc0 \temp, CP0_CONTEXT
85 MFC0 \temp, CP0_CONTEXT
88 LONG_S \stackp, kernelsp(\temp)
91 .macro get_saved_sp /* Uniprocessor variation */
93 lui k1, %highest(kernelsp)
94 daddiu k1, %higher(kernelsp)
96 daddiu k1, %hi(kernelsp)
101 LONG_L k1, %lo(kernelsp)(k1)
104 .macro set_saved_sp stackp temp temp2
105 LONG_S \stackp, kernelsp
114 sll k0, 3 /* extract cu0 bit */
119 /* Called from user mode, new stack. */
122 PTR_SUBU sp, k1, PT_SIZE
123 LONG_S k0, PT_R29(sp)
128 LONG_S v1, PT_STATUS(sp)
132 LONG_S v1, PT_CAUSE(sp)
140 LONG_S v1, PT_EPC(sp)
141 LONG_S $25, PT_R25(sp)
142 LONG_S $28, PT_R28(sp)
143 LONG_S $31, PT_R31(sp)
144 ori $28, sp, _THREAD_MASK
145 xori $28, _THREAD_MASK
164 LONG_L $24, PT_LO(sp)
170 LONG_L $24, PT_HI(sp)
171 LONG_L $10, PT_R10(sp)
172 LONG_L $11, PT_R11(sp)
174 LONG_L $12, PT_R12(sp)
175 LONG_L $13, PT_R13(sp)
176 LONG_L $14, PT_R14(sp)
177 LONG_L $15, PT_R15(sp)
178 LONG_L $24, PT_R24(sp)
181 .macro RESTORE_STATIC
182 LONG_L $16, PT_R16(sp)
183 LONG_L $17, PT_R17(sp)
184 LONG_L $18, PT_R18(sp)
185 LONG_L $19, PT_R19(sp)
186 LONG_L $20, PT_R20(sp)
187 LONG_L $21, PT_R21(sp)
188 LONG_L $22, PT_R22(sp)
189 LONG_L $23, PT_R23(sp)
190 LONG_L $30, PT_R30(sp)
193 #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
205 LONG_L v0, PT_STATUS(sp)
210 LONG_L $31, PT_R31(sp)
211 LONG_L $28, PT_R28(sp)
212 LONG_L $25, PT_R25(sp)
226 .macro RESTORE_SP_AND_RET
229 LONG_L k0, PT_EPC(sp)
230 LONG_L sp, PT_R29(sp)
248 LONG_L v0, PT_STATUS(sp)
253 LONG_L v1, PT_EPC(sp)
255 LONG_L $31, PT_R31(sp)
256 LONG_L $28, PT_R28(sp)
257 LONG_L $25, PT_R25(sp)
271 .macro RESTORE_SP_AND_RET
272 LONG_L sp, PT_R29(sp)
281 LONG_L sp, PT_R29(sp)
292 .macro RESTORE_ALL_AND_RET
301 * Move to kernel mode and disable interrupts.
302 * Set cp0 enable bit as sign that we're running on the kernel stack
306 li t1, ST0_CU0 | 0x1f
314 * Move to kernel mode and enable interrupts.
315 * Set cp0 enable bit as sign that we're running on the kernel stack
319 li t1, ST0_CU0 | 0x1f
327 * Just move to kernel mode and leave interrupts as they are.
328 * Set cp0 enable bit as sign that we're running on the kernel stack
332 li t1, ST0_CU0 | 0x1e
339 #endif /* _ASM_STACKFRAME_H */