251 lines
5.0 KiB
C
251 lines
5.0 KiB
C
/*
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* Copyright (c) 2006-2019, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2019-12-04 Jiaxun Yang Initial version
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*/
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#ifndef __STACKFRAME_H__
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#define __STACKFRAME_H__
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#include "asm.h"
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#include "mips_regs.h"
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#include "ptrace.h"
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/* You MUST ensure FP is enabled before SAVE_FPU! */
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.macro SAVE_FPU
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.set push
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.set noreorder
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#ifdef RT_USING_FPU
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/* Ensure CU1 (FPU) is enabled */
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MFC0 v1, CP0_STATUS
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ori v1, ST0_CU1
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MTC0 v1, CP0_STATUS
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SSNOP
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cfc1 v1, fcr31
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/* Store as delay slot */
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s.d $f0, PT_FPU_R0(sp)
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s.d $f2, PT_FPU_R2(sp)
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s.d $f4, PT_FPU_R4(sp)
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s.d $f6, PT_FPU_R6(sp)
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s.d $f8, PT_FPU_R8(sp)
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s.d $f10, PT_FPU_R10(sp)
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s.d $f12, PT_FPU_R12(sp)
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s.d $f14, PT_FPU_R14(sp)
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s.d $f16, PT_FPU_R16(sp)
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s.d $f18, PT_FPU_R18(sp)
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s.d $f20, PT_FPU_R20(sp)
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s.d $f22, PT_FPU_R22(sp)
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s.d $f24, PT_FPU_R24(sp)
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s.d $f26, PT_FPU_R26(sp)
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s.d $f28, PT_FPU_R28(sp)
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s.d $f30, PT_FPU_R30(sp)
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LONG_S v1, PT_FPU_FCSR31(sp)
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#endif
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.set reorder
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.set pop
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.endm
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.macro SAVE_AT
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.set push
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.set noat
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LONG_S $1, PT_R1(sp)
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.set pop
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.endm
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.macro SAVE_TEMP
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mfhi v1
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LONG_S $8, PT_R8(sp)
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LONG_S $9, PT_R9(sp)
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LONG_S v1, PT_HI(sp)
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mflo v1
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LONG_S $10, PT_R10(sp)
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LONG_S $11, PT_R11(sp)
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LONG_S v1, PT_LO(sp)
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LONG_S $12, PT_R12(sp)
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LONG_S $13, PT_R13(sp)
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LONG_S $14, PT_R14(sp)
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LONG_S $15, PT_R15(sp)
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LONG_S $24, PT_R24(sp)
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.endm
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.macro SAVE_STATIC
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LONG_S $16, PT_R16(sp)
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LONG_S $17, PT_R17(sp)
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LONG_S $18, PT_R18(sp)
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LONG_S $19, PT_R19(sp)
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LONG_S $20, PT_R20(sp)
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LONG_S $21, PT_R21(sp)
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LONG_S $22, PT_R22(sp)
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LONG_S $23, PT_R23(sp)
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LONG_S $30, PT_R30(sp)
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.endm
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.macro SAVE_SOME
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.set push
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.set noat
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.set reorder
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move k1, sp
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move k0, sp
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PTR_SUBU sp, k1, PT_SIZE
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LONG_S k0, PT_R29(sp)
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LONG_S $3, PT_R3(sp)
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LONG_S $0, PT_R0(sp)
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MFC0 v1, CP0_STATUS
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LONG_S $2, PT_R2(sp)
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LONG_S v1, PT_STATUS(sp)
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LONG_S $4, PT_R4(sp)
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MFC0 v1, CP0_CAUSE
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LONG_S $5, PT_R5(sp)
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LONG_S v1, PT_CAUSE(sp)
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LONG_S $6, PT_R6(sp)
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MFC0 v1, CP0_EPC
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LONG_S $7, PT_R7(sp)
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LONG_S v1, PT_EPC(sp)
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LONG_S $25, PT_R25(sp)
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LONG_S $28, PT_R28(sp)
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LONG_S $31, PT_R31(sp)
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.set pop
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.endm
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.macro SAVE_ALL
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SAVE_SOME
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SAVE_AT
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SAVE_TEMP
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SAVE_FPU
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SAVE_STATIC
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.endm
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.macro RESTORE_FPU
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.set push
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.set noreorder
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#ifdef RT_USING_FPU
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/* Ensure CU1 (FPU) is enabled */
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MFC0 v1, CP0_STATUS
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ori v1, ST0_CU1
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MTC0 v1, CP0_STATUS
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SSNOP
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LONG_L v1, PT_FPU_FCSR31(sp)
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ctc1 v1, fcsr31
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l.d $f0, PT_FPU_R0(sp)
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l.d $f2, PT_FPU_R2(sp)
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l.d $f4, PT_FPU_R4(sp)
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l.d $f6, PT_FPU_R6(sp)
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l.d $f8, PT_FPU_R8(sp)
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l.d $f10, PT_FPU_R10(sp)
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l.d $f12, PT_FPU_R12(sp)
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l.d $f14, PT_FPU_R14(sp)
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l.d $f16, PT_FPU_R16(sp)
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l.d $f18, PT_FPU_R18(sp)
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l.d $f20, PT_FPU_R20(sp)
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l.d $f22, PT_FPU_R22(sp)
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l.d $f24, PT_FPU_R24(sp)
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l.d $f26, PT_FPU_R26(sp)
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l.d $f28, PT_FPU_R28(sp)
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l.d $f30, PT_FPU_R30(sp)
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#endif
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.set reorder
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.set pop
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.endm
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.macro RESTORE_AT
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.set push
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.set noat
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LONG_L $1, PT_R1(sp)
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.set pop
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.endm
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.macro RESTORE_TEMP
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LONG_L $24, PT_LO(sp)
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LONG_L $8, PT_R8(sp)
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LONG_L $9, PT_R9(sp)
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mtlo $24
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LONG_L $24, PT_HI(sp)
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LONG_L $10, PT_R10(sp)
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LONG_L $11, PT_R11(sp)
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mthi $24
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LONG_L $12, PT_R12(sp)
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LONG_L $13, PT_R13(sp)
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LONG_L $14, PT_R14(sp)
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LONG_L $15, PT_R15(sp)
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LONG_L $24, PT_R24(sp)
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.endm
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.macro RESTORE_STATIC
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LONG_L $16, PT_R16(sp)
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LONG_L $17, PT_R17(sp)
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LONG_L $18, PT_R18(sp)
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LONG_L $19, PT_R19(sp)
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LONG_L $20, PT_R20(sp)
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LONG_L $21, PT_R21(sp)
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LONG_L $22, PT_R22(sp)
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LONG_L $23, PT_R23(sp)
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LONG_L $30, PT_R30(sp)
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.endm
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#define STATMASK 0x1f
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.macro RESTORE_SOME
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.set push
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.set reorder
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.set noat
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mfc0 a0, CP0_STATUS
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ori a0, STATMASK
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xori a0, STATMASK
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mtc0 a0, CP0_STATUS
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li v1, (ST0_CU1 | ST0_FR | ST0_IM)
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and a0, v1, a0
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LONG_L v0, PT_STATUS(sp)
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li v1, ~(ST0_CU1 | ST0_FR | ST0_IM)
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and v0, v1
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or v0, a0
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mtc0 v0, CP0_STATUS
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LONG_L v1, PT_EPC(sp)
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MTC0 v1, CP0_EPC
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LONG_L $31, PT_R31(sp)
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LONG_L $28, PT_R28(sp)
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LONG_L $25, PT_R25(sp)
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LONG_L $7, PT_R7(sp)
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LONG_L $6, PT_R6(sp)
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LONG_L $5, PT_R5(sp)
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LONG_L $4, PT_R4(sp)
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LONG_L $3, PT_R3(sp)
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LONG_L $2, PT_R2(sp)
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.set pop
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.endm
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.macro RESTORE_SP_AND_RET
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LONG_L sp, PT_R29(sp)
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eret
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nop
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.endm
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.macro RESTORE_SP
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LONG_L sp, PT_R29(sp)
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.endm
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.macro RESTORE_ALL
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RESTORE_TEMP
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RESTORE_FPU
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RESTORE_STATIC
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RESTORE_AT
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RESTORE_SOME
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RESTORE_SP
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.endm
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.macro RESTORE_ALL_AND_RET
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RESTORE_TEMP
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RESTORE_FPU
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RESTORE_STATIC
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RESTORE_AT
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RESTORE_SOME
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RESTORE_SP_AND_RET
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.endm
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#endif /* end of __STACKFRAME_H__ */
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