347 lines
6.5 KiB
C
347 lines
6.5 KiB
C
/*
|
|
* 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, 95, 96, 99, 2001 Ralf Baechle
|
|
* Copyright (C) 1994, 1995, 1996 Paul M. Antoine.
|
|
* Copyright (C) 1999 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_STACKFRAME_H
|
|
#define _ASM_STACKFRAME_H
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/threads.h>
|
|
|
|
#include <asm/asm.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
.macro SAVE_AT
|
|
.set push
|
|
.set noat
|
|
LONG_S $1, PT_R1(sp)
|
|
.set pop
|
|
.endm
|
|
|
|
.macro SAVE_TEMP
|
|
mfhi v1
|
|
#ifdef CONFIG_32BIT
|
|
LONG_S $8, PT_R8(sp)
|
|
LONG_S $9, PT_R9(sp)
|
|
#endif
|
|
LONG_S v1, PT_HI(sp)
|
|
mflo v1
|
|
LONG_S $10, PT_R10(sp)
|
|
LONG_S $11, PT_R11(sp)
|
|
LONG_S v1, PT_LO(sp)
|
|
LONG_S $12, PT_R12(sp)
|
|
LONG_S $13, PT_R13(sp)
|
|
LONG_S $14, PT_R14(sp)
|
|
LONG_S $15, PT_R15(sp)
|
|
LONG_S $24, PT_R24(sp)
|
|
.endm
|
|
|
|
.macro SAVE_STATIC
|
|
LONG_S $16, PT_R16(sp)
|
|
LONG_S $17, PT_R17(sp)
|
|
LONG_S $18, PT_R18(sp)
|
|
LONG_S $19, PT_R19(sp)
|
|
LONG_S $20, PT_R20(sp)
|
|
LONG_S $21, PT_R21(sp)
|
|
LONG_S $22, PT_R22(sp)
|
|
LONG_S $23, PT_R23(sp)
|
|
LONG_S $30, PT_R30(sp)
|
|
.endm
|
|
|
|
#ifdef CONFIG_SMP
|
|
.macro get_saved_sp /* SMP variation */
|
|
#ifdef CONFIG_32BIT
|
|
mfc0 k0, CP0_CONTEXT
|
|
lui k1, %hi(kernelsp)
|
|
srl k0, k0, 23
|
|
sll k0, k0, 2
|
|
addu k1, k0
|
|
LONG_L k1, %lo(kernelsp)(k1)
|
|
#endif
|
|
#if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
|
|
MFC0 k1, CP0_CONTEXT
|
|
dsra k1, 23
|
|
lui k0, %hi(pgd_current)
|
|
addiu k0, %lo(pgd_current)
|
|
dsubu k1, k0
|
|
lui k0, %hi(kernelsp)
|
|
daddu k1, k0
|
|
LONG_L k1, %lo(kernelsp)(k1)
|
|
#endif
|
|
#if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
|
|
MFC0 k1, CP0_CONTEXT
|
|
dsrl k1, 23
|
|
dsll k1, k1, 3
|
|
LONG_L k1, kernelsp(k1)
|
|
#endif
|
|
.endm
|
|
|
|
.macro set_saved_sp stackp temp temp2
|
|
#ifdef CONFIG_32BIT
|
|
mfc0 \temp, CP0_CONTEXT
|
|
srl \temp, 23
|
|
sll \temp, 2
|
|
LONG_S \stackp, kernelsp(\temp)
|
|
#endif
|
|
#if defined(CONFIG_64BIT) && !defined(CONFIG_BUILD_ELF64)
|
|
lw \temp, TI_CPU(gp)
|
|
dsll \temp, 3
|
|
lui \temp2, %hi(kernelsp)
|
|
daddu \temp, \temp2
|
|
LONG_S \stackp, %lo(kernelsp)(\temp)
|
|
#endif
|
|
#if defined(CONFIG_64BIT) && defined(CONFIG_BUILD_ELF64)
|
|
lw \temp, TI_CPU(gp)
|
|
dsll \temp, 3
|
|
LONG_S \stackp, kernelsp(\temp)
|
|
#endif
|
|
.endm
|
|
#else
|
|
.macro get_saved_sp /* Uniprocessor variation */
|
|
lui k1, %hi(kernelsp)
|
|
LONG_L k1, %lo(kernelsp)(k1)
|
|
.endm
|
|
|
|
.macro set_saved_sp stackp temp temp2
|
|
LONG_S \stackp, kernelsp
|
|
.endm
|
|
#endif
|
|
|
|
.macro SAVE_SOME
|
|
.set push
|
|
.set noat
|
|
.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
|
|
PTR_SUBU sp, k1, PT_SIZE
|
|
LONG_S k0, PT_R29(sp)
|
|
LONG_S $3, PT_R3(sp)
|
|
LONG_S $0, PT_R0(sp)
|
|
mfc0 v1, CP0_STATUS
|
|
LONG_S $2, PT_R2(sp)
|
|
LONG_S v1, PT_STATUS(sp)
|
|
LONG_S $4, PT_R4(sp)
|
|
mfc0 v1, CP0_CAUSE
|
|
LONG_S $5, PT_R5(sp)
|
|
LONG_S v1, PT_CAUSE(sp)
|
|
LONG_S $6, PT_R6(sp)
|
|
MFC0 v1, CP0_EPC
|
|
LONG_S $7, PT_R7(sp)
|
|
#ifdef CONFIG_64BIT
|
|
LONG_S $8, PT_R8(sp)
|
|
LONG_S $9, PT_R9(sp)
|
|
#endif
|
|
LONG_S v1, PT_EPC(sp)
|
|
LONG_S $25, PT_R25(sp)
|
|
LONG_S $28, PT_R28(sp)
|
|
LONG_S $31, PT_R31(sp)
|
|
ori $28, sp, _THREAD_MASK
|
|
xori $28, _THREAD_MASK
|
|
.set pop
|
|
.endm
|
|
|
|
.macro SAVE_ALL
|
|
SAVE_SOME
|
|
SAVE_AT
|
|
SAVE_TEMP
|
|
SAVE_STATIC
|
|
.endm
|
|
|
|
.macro RESTORE_AT
|
|
.set push
|
|
.set noat
|
|
LONG_L $1, PT_R1(sp)
|
|
.set pop
|
|
.endm
|
|
|
|
.macro RESTORE_TEMP
|
|
LONG_L $24, PT_LO(sp)
|
|
#ifdef CONFIG_32BIT
|
|
LONG_L $8, PT_R8(sp)
|
|
LONG_L $9, PT_R9(sp)
|
|
#endif
|
|
mtlo $24
|
|
LONG_L $24, PT_HI(sp)
|
|
LONG_L $10, PT_R10(sp)
|
|
LONG_L $11, PT_R11(sp)
|
|
mthi $24
|
|
LONG_L $12, PT_R12(sp)
|
|
LONG_L $13, PT_R13(sp)
|
|
LONG_L $14, PT_R14(sp)
|
|
LONG_L $15, PT_R15(sp)
|
|
LONG_L $24, PT_R24(sp)
|
|
.endm
|
|
|
|
.macro RESTORE_STATIC
|
|
LONG_L $16, PT_R16(sp)
|
|
LONG_L $17, PT_R17(sp)
|
|
LONG_L $18, PT_R18(sp)
|
|
LONG_L $19, PT_R19(sp)
|
|
LONG_L $20, PT_R20(sp)
|
|
LONG_L $21, PT_R21(sp)
|
|
LONG_L $22, PT_R22(sp)
|
|
LONG_L $23, PT_R23(sp)
|
|
LONG_L $30, PT_R30(sp)
|
|
.endm
|
|
|
|
#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
|
|
|
|
.macro RESTORE_SOME
|
|
.set push
|
|
.set reorder
|
|
.set noat
|
|
mfc0 a0, CP0_STATUS
|
|
ori a0, 0x1f
|
|
xori a0, 0x1f
|
|
mtc0 a0, CP0_STATUS
|
|
li v1, 0xff00
|
|
and a0, v1
|
|
LONG_L v0, PT_STATUS(sp)
|
|
nor v1, $0, v1
|
|
and v0, v1
|
|
or v0, a0
|
|
mtc0 v0, CP0_STATUS
|
|
LONG_L $31, PT_R31(sp)
|
|
LONG_L $28, PT_R28(sp)
|
|
LONG_L $25, PT_R25(sp)
|
|
#ifdef CONFIG_64BIT
|
|
LONG_L $8, PT_R8(sp)
|
|
LONG_L $9, PT_R9(sp)
|
|
#endif
|
|
LONG_L $7, PT_R7(sp)
|
|
LONG_L $6, PT_R6(sp)
|
|
LONG_L $5, PT_R5(sp)
|
|
LONG_L $4, PT_R4(sp)
|
|
LONG_L $3, PT_R3(sp)
|
|
LONG_L $2, PT_R2(sp)
|
|
.set pop
|
|
.endm
|
|
|
|
.macro RESTORE_SP_AND_RET
|
|
.set push
|
|
.set noreorder
|
|
LONG_L k0, PT_EPC(sp)
|
|
LONG_L sp, PT_R29(sp)
|
|
jr k0
|
|
rfe
|
|
.set pop
|
|
.endm
|
|
|
|
#else
|
|
|
|
.macro RESTORE_SOME
|
|
.set push
|
|
.set reorder
|
|
.set noat
|
|
mfc0 a0, CP0_STATUS
|
|
ori a0, 0x1f
|
|
xori a0, 0x1f
|
|
mtc0 a0, CP0_STATUS
|
|
li v1, 0xff00
|
|
and a0, v1
|
|
LONG_L v0, PT_STATUS(sp)
|
|
nor v1, $0, v1
|
|
and v0, v1
|
|
or v0, a0
|
|
mtc0 v0, CP0_STATUS
|
|
LONG_L v1, PT_EPC(sp)
|
|
MTC0 v1, CP0_EPC
|
|
LONG_L $31, PT_R31(sp)
|
|
LONG_L $28, PT_R28(sp)
|
|
LONG_L $25, PT_R25(sp)
|
|
#ifdef CONFIG_64BIT
|
|
LONG_L $8, PT_R8(sp)
|
|
LONG_L $9, PT_R9(sp)
|
|
#endif
|
|
LONG_L $7, PT_R7(sp)
|
|
LONG_L $6, PT_R6(sp)
|
|
LONG_L $5, PT_R5(sp)
|
|
LONG_L $4, PT_R4(sp)
|
|
LONG_L $3, PT_R3(sp)
|
|
LONG_L $2, PT_R2(sp)
|
|
.set pop
|
|
.endm
|
|
|
|
.macro RESTORE_SP_AND_RET
|
|
LONG_L sp, PT_R29(sp)
|
|
.set mips3
|
|
eret
|
|
.set mips0
|
|
.endm
|
|
|
|
#endif
|
|
|
|
.macro RESTORE_SP
|
|
LONG_L sp, PT_R29(sp)
|
|
.endm
|
|
|
|
.macro RESTORE_ALL
|
|
RESTORE_TEMP
|
|
RESTORE_STATIC
|
|
RESTORE_AT
|
|
RESTORE_SOME
|
|
RESTORE_SP
|
|
.endm
|
|
|
|
.macro RESTORE_ALL_AND_RET
|
|
RESTORE_TEMP
|
|
RESTORE_STATIC
|
|
RESTORE_AT
|
|
RESTORE_SOME
|
|
RESTORE_SP_AND_RET
|
|
.endm
|
|
|
|
/*
|
|
* Move to kernel mode and disable interrupts.
|
|
* Set cp0 enable bit as sign that we're running on the kernel stack
|
|
*/
|
|
.macro CLI
|
|
mfc0 t0, CP0_STATUS
|
|
li t1, ST0_CU0 | 0x1f
|
|
or t0, t1
|
|
xori t0, 0x1f
|
|
mtc0 t0, CP0_STATUS
|
|
irq_disable_hazard
|
|
.endm
|
|
|
|
/*
|
|
* Move to kernel mode and enable interrupts.
|
|
* Set cp0 enable bit as sign that we're running on the kernel stack
|
|
*/
|
|
.macro STI
|
|
mfc0 t0, CP0_STATUS
|
|
li t1, ST0_CU0 | 0x1f
|
|
or t0, t1
|
|
xori t0, 0x1e
|
|
mtc0 t0, CP0_STATUS
|
|
irq_enable_hazard
|
|
.endm
|
|
|
|
/*
|
|
* 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
|
|
*/
|
|
.macro KMODE
|
|
mfc0 t0, CP0_STATUS
|
|
li t1, ST0_CU0 | 0x1e
|
|
or t0, t1
|
|
xori t0, 0x1e
|
|
mtc0 t0, CP0_STATUS
|
|
irq_disable_hazard
|
|
.endm
|
|
|
|
#endif /* _ASM_STACKFRAME_H */
|