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r4k_fpu.S
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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) 1996, 98, 99, 2000, 01 Ralf Baechle
*
* Multi-arch abstraction and asm macros for easier reading:
* Copyright (C) 1996 David S. Miller ([email protected])
*
* Carsten Langgaard, [email protected]
* Copyright (C) 2000 MIPS Technologies, Inc.
* Copyright (C) 1999, 2001 Silicon Graphics, Inc.
*/
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/errno.h>
#include <asm/export.h>
#include <asm/fpregdef.h>
#include <asm/mipsregs.h>
#include <asm/asm-offsets.h>
#include <asm/regdef.h>
/* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */
#undef fp
.macro EX insn, reg, src
.set push
SET_HARDFLOAT
.set nomacro
.ex\@: \insn \reg, \src
.set pop
.section __ex_table,"a"
PTR_WD .ex\@, fault
.previous
.endm
/*
* Save a thread's fp context.
*/
LEAF(_save_fp)
EXPORT_SYMBOL(_save_fp)
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
defined(CONFIG_CPU_MIPSR5) || defined(CONFIG_CPU_MIPSR6)
mfc0 t0, CP0_STATUS
#endif
fpu_save_double a0 t0 t1 # clobbers t1
jr ra
END(_save_fp)
/*
* Restore a thread's fp context.
*/
LEAF(_restore_fp)
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
defined(CONFIG_CPU_MIPSR5) || defined(CONFIG_CPU_MIPSR6)
mfc0 t0, CP0_STATUS
#endif
fpu_restore_double a0 t0 t1 # clobbers t1
jr ra
END(_restore_fp)
#ifdef CONFIG_CPU_HAS_MSA
/*
* Save a thread's MSA vector context.
*/
LEAF(_save_msa)
EXPORT_SYMBOL(_save_msa)
msa_save_all a0
jr ra
END(_save_msa)
/*
* Restore a thread's MSA vector context.
*/
LEAF(_restore_msa)
msa_restore_all a0
jr ra
END(_restore_msa)
LEAF(_init_msa_upper)
msa_init_all_upper
jr ra
END(_init_msa_upper)
#endif
.set noreorder
/**
* _save_fp_context() - save FP context from the FPU
* @a0 - pointer to fpregs field of sigcontext
* @a1 - pointer to fpc_csr field of sigcontext
*
* Save FP context, including the 32 FP data registers and the FP
* control & status register, from the FPU to signal context.
*/
LEAF(_save_fp_context)
.set push
SET_HARDFLOAT
cfc1 t1, fcr31
.set pop
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
defined(CONFIG_CPU_MIPSR5) || defined(CONFIG_CPU_MIPSR6)
.set push
SET_HARDFLOAT
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR5)
.set mips32r2
.set fp=64
mfc0 t0, CP0_STATUS
sll t0, t0, 5
bgez t0, 1f # skip storing odd if FR=0
nop
#endif
/* Store the 16 odd double precision registers */
EX sdc1 $f1, 8(a0)
EX sdc1 $f3, 24(a0)
EX sdc1 $f5, 40(a0)
EX sdc1 $f7, 56(a0)
EX sdc1 $f9, 72(a0)
EX sdc1 $f11, 88(a0)
EX sdc1 $f13, 104(a0)
EX sdc1 $f15, 120(a0)
EX sdc1 $f17, 136(a0)
EX sdc1 $f19, 152(a0)
EX sdc1 $f21, 168(a0)
EX sdc1 $f23, 184(a0)
EX sdc1 $f25, 200(a0)
EX sdc1 $f27, 216(a0)
EX sdc1 $f29, 232(a0)
EX sdc1 $f31, 248(a0)
1: .set pop
#endif
.set push
SET_HARDFLOAT
/* Store the 16 even double precision registers */
EX sdc1 $f0, 0(a0)
EX sdc1 $f2, 16(a0)
EX sdc1 $f4, 32(a0)
EX sdc1 $f6, 48(a0)
EX sdc1 $f8, 64(a0)
EX sdc1 $f10, 80(a0)
EX sdc1 $f12, 96(a0)
EX sdc1 $f14, 112(a0)
EX sdc1 $f16, 128(a0)
EX sdc1 $f18, 144(a0)
EX sdc1 $f20, 160(a0)
EX sdc1 $f22, 176(a0)
EX sdc1 $f24, 192(a0)
EX sdc1 $f26, 208(a0)
EX sdc1 $f28, 224(a0)
EX sdc1 $f30, 240(a0)
EX sw t1, 0(a1)
jr ra
li v0, 0 # success
.set pop
END(_save_fp_context)
/**
* _restore_fp_context() - restore FP context to the FPU
* @a0 - pointer to fpregs field of sigcontext
* @a1 - pointer to fpc_csr field of sigcontext
*
* Restore FP context, including the 32 FP data registers and the FP
* control & status register, from signal context to the FPU.
*/
LEAF(_restore_fp_context)
EX lw t1, 0(a1)
#if defined(CONFIG_64BIT) || defined(CONFIG_CPU_MIPSR2) || \
defined(CONFIG_CPU_MIPSR5) || defined(CONFIG_CPU_MIPSR6)
.set push
SET_HARDFLOAT
#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR5)
.set mips32r2
.set fp=64
mfc0 t0, CP0_STATUS
sll t0, t0, 5
bgez t0, 1f # skip loading odd if FR=0
nop
#endif
EX ldc1 $f1, 8(a0)
EX ldc1 $f3, 24(a0)
EX ldc1 $f5, 40(a0)
EX ldc1 $f7, 56(a0)
EX ldc1 $f9, 72(a0)
EX ldc1 $f11, 88(a0)
EX ldc1 $f13, 104(a0)
EX ldc1 $f15, 120(a0)
EX ldc1 $f17, 136(a0)
EX ldc1 $f19, 152(a0)
EX ldc1 $f21, 168(a0)
EX ldc1 $f23, 184(a0)
EX ldc1 $f25, 200(a0)
EX ldc1 $f27, 216(a0)
EX ldc1 $f29, 232(a0)
EX ldc1 $f31, 248(a0)
1: .set pop
#endif
.set push
SET_HARDFLOAT
EX ldc1 $f0, 0(a0)
EX ldc1 $f2, 16(a0)
EX ldc1 $f4, 32(a0)
EX ldc1 $f6, 48(a0)
EX ldc1 $f8, 64(a0)
EX ldc1 $f10, 80(a0)
EX ldc1 $f12, 96(a0)
EX ldc1 $f14, 112(a0)
EX ldc1 $f16, 128(a0)
EX ldc1 $f18, 144(a0)
EX ldc1 $f20, 160(a0)
EX ldc1 $f22, 176(a0)
EX ldc1 $f24, 192(a0)
EX ldc1 $f26, 208(a0)
EX ldc1 $f28, 224(a0)
EX ldc1 $f30, 240(a0)
ctc1 t1, fcr31
.set pop
jr ra
li v0, 0 # success
END(_restore_fp_context)
#ifdef CONFIG_CPU_HAS_MSA
.macro op_one_wr op, idx, base
.align 4
\idx: \op \idx, 0, \base
jr ra
nop
.endm
.macro op_msa_wr name, op
LEAF(\name)
.set push
.set noreorder
sll t0, a0, 4
PTR_LA t1, 0f
PTR_ADDU t0, t0, t1
jr t0
nop
op_one_wr \op, 0, a1
op_one_wr \op, 1, a1
op_one_wr \op, 2, a1
op_one_wr \op, 3, a1
op_one_wr \op, 4, a1
op_one_wr \op, 5, a1
op_one_wr \op, 6, a1
op_one_wr \op, 7, a1
op_one_wr \op, 8, a1
op_one_wr \op, 9, a1
op_one_wr \op, 10, a1
op_one_wr \op, 11, a1
op_one_wr \op, 12, a1
op_one_wr \op, 13, a1
op_one_wr \op, 14, a1
op_one_wr \op, 15, a1
op_one_wr \op, 16, a1
op_one_wr \op, 17, a1
op_one_wr \op, 18, a1
op_one_wr \op, 19, a1
op_one_wr \op, 20, a1
op_one_wr \op, 21, a1
op_one_wr \op, 22, a1
op_one_wr \op, 23, a1
op_one_wr \op, 24, a1
op_one_wr \op, 25, a1
op_one_wr \op, 26, a1
op_one_wr \op, 27, a1
op_one_wr \op, 28, a1
op_one_wr \op, 29, a1
op_one_wr \op, 30, a1
op_one_wr \op, 31, a1
.set pop
END(\name)
.endm
op_msa_wr read_msa_wr_b, st_b
op_msa_wr read_msa_wr_h, st_h
op_msa_wr read_msa_wr_w, st_w
op_msa_wr read_msa_wr_d, st_d
op_msa_wr write_msa_wr_b, ld_b
op_msa_wr write_msa_wr_h, ld_h
op_msa_wr write_msa_wr_w, ld_w
op_msa_wr write_msa_wr_d, ld_d
#endif /* CONFIG_CPU_HAS_MSA */
#ifdef CONFIG_CPU_HAS_MSA
.macro save_msa_upper wr, off, base
.set push
.set noat
#ifdef CONFIG_64BIT
copy_s_d \wr, 1
EX sd $1, \off(\base)
#elif defined(CONFIG_CPU_LITTLE_ENDIAN)
copy_s_w \wr, 2
EX sw $1, \off(\base)
copy_s_w \wr, 3
EX sw $1, (\off+4)(\base)
#else /* CONFIG_CPU_BIG_ENDIAN */
copy_s_w \wr, 2
EX sw $1, (\off+4)(\base)
copy_s_w \wr, 3
EX sw $1, \off(\base)
#endif
.set pop
.endm
LEAF(_save_msa_all_upper)
save_msa_upper 0, 0x00, a0
save_msa_upper 1, 0x08, a0
save_msa_upper 2, 0x10, a0
save_msa_upper 3, 0x18, a0
save_msa_upper 4, 0x20, a0
save_msa_upper 5, 0x28, a0
save_msa_upper 6, 0x30, a0
save_msa_upper 7, 0x38, a0
save_msa_upper 8, 0x40, a0
save_msa_upper 9, 0x48, a0
save_msa_upper 10, 0x50, a0
save_msa_upper 11, 0x58, a0
save_msa_upper 12, 0x60, a0
save_msa_upper 13, 0x68, a0
save_msa_upper 14, 0x70, a0
save_msa_upper 15, 0x78, a0
save_msa_upper 16, 0x80, a0
save_msa_upper 17, 0x88, a0
save_msa_upper 18, 0x90, a0
save_msa_upper 19, 0x98, a0
save_msa_upper 20, 0xa0, a0
save_msa_upper 21, 0xa8, a0
save_msa_upper 22, 0xb0, a0
save_msa_upper 23, 0xb8, a0
save_msa_upper 24, 0xc0, a0
save_msa_upper 25, 0xc8, a0
save_msa_upper 26, 0xd0, a0
save_msa_upper 27, 0xd8, a0
save_msa_upper 28, 0xe0, a0
save_msa_upper 29, 0xe8, a0
save_msa_upper 30, 0xf0, a0
save_msa_upper 31, 0xf8, a0
jr ra
li v0, 0
END(_save_msa_all_upper)
.macro restore_msa_upper wr, off, base
.set push
.set noat
#ifdef CONFIG_64BIT
EX ld $1, \off(\base)
insert_d \wr, 1
#elif defined(CONFIG_CPU_LITTLE_ENDIAN)
EX lw $1, \off(\base)
insert_w \wr, 2
EX lw $1, (\off+4)(\base)
insert_w \wr, 3
#else /* CONFIG_CPU_BIG_ENDIAN */
EX lw $1, (\off+4)(\base)
insert_w \wr, 2
EX lw $1, \off(\base)
insert_w \wr, 3
#endif
.set pop
.endm
LEAF(_restore_msa_all_upper)
restore_msa_upper 0, 0x00, a0
restore_msa_upper 1, 0x08, a0
restore_msa_upper 2, 0x10, a0
restore_msa_upper 3, 0x18, a0
restore_msa_upper 4, 0x20, a0
restore_msa_upper 5, 0x28, a0
restore_msa_upper 6, 0x30, a0
restore_msa_upper 7, 0x38, a0
restore_msa_upper 8, 0x40, a0
restore_msa_upper 9, 0x48, a0
restore_msa_upper 10, 0x50, a0
restore_msa_upper 11, 0x58, a0
restore_msa_upper 12, 0x60, a0
restore_msa_upper 13, 0x68, a0
restore_msa_upper 14, 0x70, a0
restore_msa_upper 15, 0x78, a0
restore_msa_upper 16, 0x80, a0
restore_msa_upper 17, 0x88, a0
restore_msa_upper 18, 0x90, a0
restore_msa_upper 19, 0x98, a0
restore_msa_upper 20, 0xa0, a0
restore_msa_upper 21, 0xa8, a0
restore_msa_upper 22, 0xb0, a0
restore_msa_upper 23, 0xb8, a0
restore_msa_upper 24, 0xc0, a0
restore_msa_upper 25, 0xc8, a0
restore_msa_upper 26, 0xd0, a0
restore_msa_upper 27, 0xd8, a0
restore_msa_upper 28, 0xe0, a0
restore_msa_upper 29, 0xe8, a0
restore_msa_upper 30, 0xf0, a0
restore_msa_upper 31, 0xf8, a0
jr ra
li v0, 0
END(_restore_msa_all_upper)
#endif /* CONFIG_CPU_HAS_MSA */
.set reorder
.type fault, @function
.ent fault
fault: li v0, -EFAULT # failure
jr ra
.end fault