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linux-pinenote/arch/mips/include/asm/asmmacro.h
James Hogan 466aec5f29 Revert "MIPS: Don't assume 64-bit FP registers for context switch" 
This reverts commit 02987633df.

The basic premise of the patch was incorrect since MSA context
(including FP state) is saved using st.d which stores two consecutive
64-bit words in memory rather than a single 128-bit word. This means
that even with big endian MSA, the FP state is still in the first 64-bit
word.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9168/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2015-03-27 19:42:48 +01:00

505 lines
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/*
* 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) 2003 Ralf Baechle
*/
#ifndef _ASM_ASMMACRO_H
#define _ASM_ASMMACRO_H
#include <asm/hazards.h>
#include <asm/asm-offsets.h>
#include <asm/msa.h>
#ifdef CONFIG_32BIT
#include <asm/asmmacro-32.h>
#endif
#ifdef CONFIG_64BIT
#include <asm/asmmacro-64.h>
#endif
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
.macro local_irq_enable reg=t0
ei
irq_enable_hazard
.endm
.macro local_irq_disable reg=t0
di
irq_disable_hazard
.endm
#else
.macro local_irq_enable reg=t0
mfc0 \reg, CP0_STATUS
ori \reg, \reg, 1
mtc0 \reg, CP0_STATUS
irq_enable_hazard
.endm
.macro local_irq_disable reg=t0
#ifdef CONFIG_PREEMPT
lw \reg, TI_PRE_COUNT($28)
addi \reg, \reg, 1
sw \reg, TI_PRE_COUNT($28)
#endif
mfc0 \reg, CP0_STATUS
ori \reg, \reg, 1
xori \reg, \reg, 1
mtc0 \reg, CP0_STATUS
irq_disable_hazard
#ifdef CONFIG_PREEMPT
lw \reg, TI_PRE_COUNT($28)
addi \reg, \reg, -1
sw \reg, TI_PRE_COUNT($28)
#endif
.endm
#endif /* CONFIG_CPU_MIPSR2 */
.macro fpu_save_16even thread tmp=t0
.set push
SET_HARDFLOAT
cfc1 \tmp, fcr31
sdc1 $f0, THREAD_FPR0(\thread)
sdc1 $f2, THREAD_FPR2(\thread)
sdc1 $f4, THREAD_FPR4(\thread)
sdc1 $f6, THREAD_FPR6(\thread)
sdc1 $f8, THREAD_FPR8(\thread)
sdc1 $f10, THREAD_FPR10(\thread)
sdc1 $f12, THREAD_FPR12(\thread)
sdc1 $f14, THREAD_FPR14(\thread)
sdc1 $f16, THREAD_FPR16(\thread)
sdc1 $f18, THREAD_FPR18(\thread)
sdc1 $f20, THREAD_FPR20(\thread)
sdc1 $f22, THREAD_FPR22(\thread)
sdc1 $f24, THREAD_FPR24(\thread)
sdc1 $f26, THREAD_FPR26(\thread)
sdc1 $f28, THREAD_FPR28(\thread)
sdc1 $f30, THREAD_FPR30(\thread)
sw \tmp, THREAD_FCR31(\thread)
.set pop
.endm
.macro fpu_save_16odd thread
.set push
.set mips64r2
SET_HARDFLOAT
sdc1 $f1, THREAD_FPR1(\thread)
sdc1 $f3, THREAD_FPR3(\thread)
sdc1 $f5, THREAD_FPR5(\thread)
sdc1 $f7, THREAD_FPR7(\thread)
sdc1 $f9, THREAD_FPR9(\thread)
sdc1 $f11, THREAD_FPR11(\thread)
sdc1 $f13, THREAD_FPR13(\thread)
sdc1 $f15, THREAD_FPR15(\thread)
sdc1 $f17, THREAD_FPR17(\thread)
sdc1 $f19, THREAD_FPR19(\thread)
sdc1 $f21, THREAD_FPR21(\thread)
sdc1 $f23, THREAD_FPR23(\thread)
sdc1 $f25, THREAD_FPR25(\thread)
sdc1 $f27, THREAD_FPR27(\thread)
sdc1 $f29, THREAD_FPR29(\thread)
sdc1 $f31, THREAD_FPR31(\thread)
.set pop
.endm
.macro fpu_save_double thread status tmp
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2) || \
defined(CONFIG_CPU_MIPS32_R6)
sll \tmp, \status, 5
bgez \tmp, 10f
fpu_save_16odd \thread
10:
#endif
fpu_save_16even \thread \tmp
.endm
.macro fpu_restore_16even thread tmp=t0
.set push
SET_HARDFLOAT
lw \tmp, THREAD_FCR31(\thread)
ldc1 $f0, THREAD_FPR0(\thread)
ldc1 $f2, THREAD_FPR2(\thread)
ldc1 $f4, THREAD_FPR4(\thread)
ldc1 $f6, THREAD_FPR6(\thread)
ldc1 $f8, THREAD_FPR8(\thread)
ldc1 $f10, THREAD_FPR10(\thread)
ldc1 $f12, THREAD_FPR12(\thread)
ldc1 $f14, THREAD_FPR14(\thread)
ldc1 $f16, THREAD_FPR16(\thread)
ldc1 $f18, THREAD_FPR18(\thread)
ldc1 $f20, THREAD_FPR20(\thread)
ldc1 $f22, THREAD_FPR22(\thread)
ldc1 $f24, THREAD_FPR24(\thread)
ldc1 $f26, THREAD_FPR26(\thread)
ldc1 $f28, THREAD_FPR28(\thread)
ldc1 $f30, THREAD_FPR30(\thread)
ctc1 \tmp, fcr31
.endm
.macro fpu_restore_16odd thread
.set push
.set mips64r2
SET_HARDFLOAT
ldc1 $f1, THREAD_FPR1(\thread)
ldc1 $f3, THREAD_FPR3(\thread)
ldc1 $f5, THREAD_FPR5(\thread)
ldc1 $f7, THREAD_FPR7(\thread)
ldc1 $f9, THREAD_FPR9(\thread)
ldc1 $f11, THREAD_FPR11(\thread)
ldc1 $f13, THREAD_FPR13(\thread)
ldc1 $f15, THREAD_FPR15(\thread)
ldc1 $f17, THREAD_FPR17(\thread)
ldc1 $f19, THREAD_FPR19(\thread)
ldc1 $f21, THREAD_FPR21(\thread)
ldc1 $f23, THREAD_FPR23(\thread)
ldc1 $f25, THREAD_FPR25(\thread)
ldc1 $f27, THREAD_FPR27(\thread)
ldc1 $f29, THREAD_FPR29(\thread)
ldc1 $f31, THREAD_FPR31(\thread)
.set pop
.endm
.macro fpu_restore_double thread status tmp
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPS32_R2) || \
defined(CONFIG_CPU_MIPS32_R6)
sll \tmp, \status, 5
bgez \tmp, 10f # 16 register mode?
fpu_restore_16odd \thread
10:
#endif
fpu_restore_16even \thread \tmp
.endm
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
.macro _EXT rd, rs, p, s
ext \rd, \rs, \p, \s
.endm
#else /* !CONFIG_CPU_MIPSR2 || !CONFIG_CPU_MIPSR6 */
.macro _EXT rd, rs, p, s
srl \rd, \rs, \p
andi \rd, \rd, (1 << \s) - 1
.endm
#endif /* !CONFIG_CPU_MIPSR2 || !CONFIG_CPU_MIPSR6 */
/*
* Temporary until all gas have MT ASE support
*/
.macro DMT reg=0
.word 0x41600bc1 | (\reg << 16)
.endm
.macro EMT reg=0
.word 0x41600be1 | (\reg << 16)
.endm
.macro DVPE reg=0
.word 0x41600001 | (\reg << 16)
.endm
.macro EVPE reg=0
.word 0x41600021 | (\reg << 16)
.endm
.macro MFTR rt=0, rd=0, u=0, sel=0
.word 0x41000000 | (\rt << 16) | (\rd << 11) | (\u << 5) | (\sel)
.endm
.macro MTTR rt=0, rd=0, u=0, sel=0
.word 0x41800000 | (\rt << 16) | (\rd << 11) | (\u << 5) | (\sel)
.endm
#ifdef TOOLCHAIN_SUPPORTS_MSA
.macro _cfcmsa rd, cs
.set push
.set mips32r2
.set msa
cfcmsa \rd, $\cs
.set pop
.endm
.macro _ctcmsa cd, rs
.set push
.set mips32r2
.set msa
ctcmsa $\cd, \rs
.set pop
.endm
.macro ld_d wd, off, base
.set push
.set mips32r2
.set msa
ld.d $w\wd, \off(\base)
.set pop
.endm
.macro st_d wd, off, base
.set push
.set mips32r2
.set msa
st.d $w\wd, \off(\base)
.set pop
.endm
.macro copy_u_w ws, n
.set push
.set mips32r2
.set msa
copy_u.w $1, $w\ws[\n]
.set pop
.endm
.macro copy_u_d ws, n
.set push
.set mips64r2
.set msa
copy_u.d $1, $w\ws[\n]
.set pop
.endm
.macro insert_w wd, n
.set push
.set mips32r2
.set msa
insert.w $w\wd[\n], $1
.set pop
.endm
.macro insert_d wd, n
.set push
.set mips64r2
.set msa
insert.d $w\wd[\n], $1
.set pop
.endm
#else
#ifdef CONFIG_CPU_MICROMIPS
#define CFC_MSA_INSN 0x587e0056
#define CTC_MSA_INSN 0x583e0816
#define LDD_MSA_INSN 0x58000837
#define STD_MSA_INSN 0x5800083f
#define COPY_UW_MSA_INSN 0x58f00056
#define COPY_UD_MSA_INSN 0x58f80056
#define INSERT_W_MSA_INSN 0x59300816
#define INSERT_D_MSA_INSN 0x59380816
#else
#define CFC_MSA_INSN 0x787e0059
#define CTC_MSA_INSN 0x783e0819
#define LDD_MSA_INSN 0x78000823
#define STD_MSA_INSN 0x78000827
#define COPY_UW_MSA_INSN 0x78f00059
#define COPY_UD_MSA_INSN 0x78f80059
#define INSERT_W_MSA_INSN 0x79300819
#define INSERT_D_MSA_INSN 0x79380819
#endif
/*
* Temporary until all toolchains in use include MSA support.
*/
.macro _cfcmsa rd, cs
.set push
.set noat
SET_HARDFLOAT
.insn
.word CFC_MSA_INSN | (\cs << 11)
move \rd, $1
.set pop
.endm
.macro _ctcmsa cd, rs
.set push
.set noat
SET_HARDFLOAT
move $1, \rs
.word CTC_MSA_INSN | (\cd << 6)
.set pop
.endm
.macro ld_d wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word LDD_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro st_d wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word STD_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro copy_u_w ws, n
.set push
.set noat
SET_HARDFLOAT
.insn
.word COPY_UW_MSA_INSN | (\n << 16) | (\ws << 11)
.set pop
.endm
.macro copy_u_d ws, n
.set push
.set noat
SET_HARDFLOAT
.insn
.word COPY_UD_MSA_INSN | (\n << 16) | (\ws << 11)
.set pop
.endm
.macro insert_w wd, n
.set push
.set noat
SET_HARDFLOAT
.word INSERT_W_MSA_INSN | (\n << 16) | (\wd << 6)
.set pop
.endm
.macro insert_d wd, n
.set push
.set noat
SET_HARDFLOAT
.word INSERT_D_MSA_INSN | (\n << 16) | (\wd << 6)
.set pop
.endm
#endif
.macro msa_save_all thread
st_d 0, THREAD_FPR0, \thread
st_d 1, THREAD_FPR1, \thread
st_d 2, THREAD_FPR2, \thread
st_d 3, THREAD_FPR3, \thread
st_d 4, THREAD_FPR4, \thread
st_d 5, THREAD_FPR5, \thread
st_d 6, THREAD_FPR6, \thread
st_d 7, THREAD_FPR7, \thread
st_d 8, THREAD_FPR8, \thread
st_d 9, THREAD_FPR9, \thread
st_d 10, THREAD_FPR10, \thread
st_d 11, THREAD_FPR11, \thread
st_d 12, THREAD_FPR12, \thread
st_d 13, THREAD_FPR13, \thread
st_d 14, THREAD_FPR14, \thread
st_d 15, THREAD_FPR15, \thread
st_d 16, THREAD_FPR16, \thread
st_d 17, THREAD_FPR17, \thread
st_d 18, THREAD_FPR18, \thread
st_d 19, THREAD_FPR19, \thread
st_d 20, THREAD_FPR20, \thread
st_d 21, THREAD_FPR21, \thread
st_d 22, THREAD_FPR22, \thread
st_d 23, THREAD_FPR23, \thread
st_d 24, THREAD_FPR24, \thread
st_d 25, THREAD_FPR25, \thread
st_d 26, THREAD_FPR26, \thread
st_d 27, THREAD_FPR27, \thread
st_d 28, THREAD_FPR28, \thread
st_d 29, THREAD_FPR29, \thread
st_d 30, THREAD_FPR30, \thread
st_d 31, THREAD_FPR31, \thread
.set push
.set noat
SET_HARDFLOAT
_cfcmsa $1, MSA_CSR
sw $1, THREAD_MSA_CSR(\thread)
.set pop
.endm
.macro msa_restore_all thread
.set push
.set noat
SET_HARDFLOAT
lw $1, THREAD_MSA_CSR(\thread)
_ctcmsa MSA_CSR, $1
.set pop
ld_d 0, THREAD_FPR0, \thread
ld_d 1, THREAD_FPR1, \thread
ld_d 2, THREAD_FPR2, \thread
ld_d 3, THREAD_FPR3, \thread
ld_d 4, THREAD_FPR4, \thread
ld_d 5, THREAD_FPR5, \thread
ld_d 6, THREAD_FPR6, \thread
ld_d 7, THREAD_FPR7, \thread
ld_d 8, THREAD_FPR8, \thread
ld_d 9, THREAD_FPR9, \thread
ld_d 10, THREAD_FPR10, \thread
ld_d 11, THREAD_FPR11, \thread
ld_d 12, THREAD_FPR12, \thread
ld_d 13, THREAD_FPR13, \thread
ld_d 14, THREAD_FPR14, \thread
ld_d 15, THREAD_FPR15, \thread
ld_d 16, THREAD_FPR16, \thread
ld_d 17, THREAD_FPR17, \thread
ld_d 18, THREAD_FPR18, \thread
ld_d 19, THREAD_FPR19, \thread
ld_d 20, THREAD_FPR20, \thread
ld_d 21, THREAD_FPR21, \thread
ld_d 22, THREAD_FPR22, \thread
ld_d 23, THREAD_FPR23, \thread
ld_d 24, THREAD_FPR24, \thread
ld_d 25, THREAD_FPR25, \thread
ld_d 26, THREAD_FPR26, \thread
ld_d 27, THREAD_FPR27, \thread
ld_d 28, THREAD_FPR28, \thread
ld_d 29, THREAD_FPR29, \thread
ld_d 30, THREAD_FPR30, \thread
ld_d 31, THREAD_FPR31, \thread
.endm
.macro msa_init_upper wd
#ifdef CONFIG_64BIT
insert_d \wd, 1
#else
insert_w \wd, 2
insert_w \wd, 3
#endif
.endm
.macro msa_init_all_upper
.set push
.set noat
SET_HARDFLOAT
not $1, zero
msa_init_upper 0
msa_init_upper 1
msa_init_upper 2
msa_init_upper 3
msa_init_upper 4
msa_init_upper 5
msa_init_upper 6
msa_init_upper 7
msa_init_upper 8
msa_init_upper 9
msa_init_upper 10
msa_init_upper 11
msa_init_upper 12
msa_init_upper 13
msa_init_upper 14
msa_init_upper 15
msa_init_upper 16
msa_init_upper 17
msa_init_upper 18
msa_init_upper 19
msa_init_upper 20
msa_init_upper 21
msa_init_upper 22
msa_init_upper 23
msa_init_upper 24
msa_init_upper 25
msa_init_upper 26
msa_init_upper 27
msa_init_upper 28
msa_init_upper 29
msa_init_upper 30
msa_init_upper 31
.set pop
.endm
#endif /* _ASM_ASMMACRO_H */
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