/*
* 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.
*
* MIPS SIMD Architecture (MSA) context handling code for KVM.
*
* Copyright (C) 2015 Imagination Technologies Ltd.
*/
#include <asm/asm.h>
#include <asm/asm-offsets.h>
#include <asm/asmmacro.h>
#include <asm/regdef.h>
.set noreorder
.set noat
LEAF(__kvm_save_msa)
st_d 0, VCPU_FPR0, a0
st_d 1, VCPU_FPR1, a0
st_d 2, VCPU_FPR2, a0
st_d 3, VCPU_FPR3, a0
st_d 4, VCPU_FPR4, a0
st_d 5, VCPU_FPR5, a0
st_d 6, VCPU_FPR6, a0
st_d 7, VCPU_FPR7, a0
st_d 8, VCPU_FPR8, a0
st_d 9, VCPU_FPR9, a0
st_d 10, VCPU_FPR10, a0
st_d 11, VCPU_FPR11, a0
st_d 12, VCPU_FPR12, a0
st_d 13, VCPU_FPR13, a0
st_d 14, VCPU_FPR14, a0
st_d 15, VCPU_FPR15, a0
st_d 16, VCPU_FPR16, a0
st_d 17, VCPU_FPR17, a0
st_d 18, VCPU_FPR18, a0
st_d 19, VCPU_FPR19, a0
st_d 20, VCPU_FPR20, a0
st_d 21, VCPU_FPR21, a0
st_d 22, VCPU_FPR22, a0
st_d 23, VCPU_FPR23, a0
st_d 24, VCPU_FPR24, a0
st_d 25, VCPU_FPR25, a0
st_d 26, VCPU_FPR26, a0
st_d 27, VCPU_FPR27, a0
st_d 28, VCPU_FPR28, a0
st_d 29, VCPU_FPR29, a0
st_d 30, VCPU_FPR30, a0
st_d 31, VCPU_FPR31, a0
jr ra
nop
END(__kvm_save_msa)
LEAF(__kvm_restore_msa)
ld_d 0, VCPU_FPR0, a0
ld_d 1, VCPU_FPR1, a0
ld_d 2, VCPU_FPR2, a0
ld_d 3, VCPU_FPR3, a0
ld_d 4, VCPU_FPR4, a0
ld_d 5, VCPU_FPR5, a0
ld_d 6, VCPU_FPR6, a0
ld_d 7, VCPU_FPR7, a0
ld_d 8, VCPU_FPR8, a0
ld_d 9, VCPU_FPR9, a0
ld_d 10, VCPU_FPR10, a0
ld_d 11, VCPU_FPR11, a0
ld_d 12, VCPU_FPR12, a0
ld_d 13, VCPU_FPR13, a0
ld_d 14, VCPU_FPR14, a0
ld_d 15, VCPU_FPR15, a0
ld_d 16, VCPU_FPR16, a0
ld_d 17, VCPU_FPR17, a0
ld_d 18, VCPU_FPR18, a0
ld_d 19, VCPU_FPR19, a0
ld_d 20, VCPU_FPR20, a0
ld_d 21, VCPU_FPR21, a0
ld_d 22, VCPU_FPR22, a0
ld_d 23, VCPU_FPR23, a0
ld_d 24, VCPU_FPR24, a0
ld_d 25, VCPU_FPR25, a0
ld_d 26, VCPU_FPR26, a0
ld_d 27, VCPU_FPR27, a0
ld_d 28, VCPU_FPR28, a0
ld_d 29, VCPU_FPR29, a0
ld_d 30, VCPU_FPR30, a0
ld_d 31, VCPU_FPR31, a0
jr ra
nop
END(__kvm_restore_msa)
.macro kvm_restore_msa_upper wr, off, base
.set push
.set noat
#ifdef CONFIG_64BIT
ld $1, \off(\base)
insert_d \wr, 1
#elif defined(CONFIG_CPU_LITTLE_ENDIAN)
lw $1, \off(\base)
insert_w \wr, 2
lw $1, (\off+4)(\base)
insert_w \wr, 3
#else /* CONFIG_CPU_BIG_ENDIAN */
lw $1, (\off+4)(\base)
insert_w \wr, 2
lw $1, \off(\base)
insert_w \wr, 3
#endif
.set pop
.endm
LEAF(__kvm_restore_msa_upper)
kvm_restore_msa_upper 0, VCPU_FPR0 +8, a0
kvm_restore_msa_upper 1, VCPU_FPR1 +8, a0
kvm_restore_msa_upper 2, VCPU_FPR2 +8, a0
kvm_restore_msa_upper 3, VCPU_FPR3 +8, a0
kvm_restore_msa_upper 4, VCPU_FPR4 +8, a0
kvm_restore_msa_upper 5, VCPU_FPR5 +8, a0
kvm_restore_msa_upper 6, VCPU_FPR6 +8, a0
kvm_restore_msa_upper 7, VCPU_FPR7 +8, a0
kvm_restore_msa_upper 8, VCPU_FPR8 +8, a0
kvm_restore_msa_upper 9, VCPU_FPR9 +8, a0
kvm_restore_msa_upper 10, VCPU_FPR10+8, a0
kvm_restore_msa_upper 11, VCPU_FPR11+8, a0
kvm_restore_msa_upper 12, VCPU_FPR12+8, a0
kvm_restore_msa_upper 13, VCPU_FPR13+8, a0
kvm_restore_msa_upper 14, VCPU_FPR14+8, a0
kvm_restore_msa_upper 15, VCPU_FPR15+8, a0
kvm_restore_msa_upper 16, VCPU_FPR16+8, a0
kvm_restore_msa_upper 17, VCPU_FPR17+8, a0
kvm_restore_msa_upper 18, VCPU_FPR18+8, a0
kvm_restore_msa_upper 19, VCPU_FPR19+8, a0
kvm_restore_msa_upper 20, VCPU_FPR20+8, a0
kvm_restore_msa_upper 21, VCPU_FPR21+8, a0
kvm_restore_msa_upper 22, VCPU_FPR22+8, a0
kvm_restore_msa_upper 23, VCPU_FPR23+8, a0
kvm_restore_msa_upper 24, VCPU_FPR24+8, a0
kvm_restore_msa_upper 25, VCPU_FPR25+8, a0
kvm_restore_msa_upper 26, VCPU_FPR26+8, a0
kvm_restore_msa_upper 27, VCPU_FPR27+8, a0
kvm_restore_msa_upper 28, VCPU_FPR28+8, a0
kvm_restore_msa_upper 29, VCPU_FPR29+8, a0
kvm_restore_msa_upper 30, VCPU_FPR30+8, a0
kvm_restore_msa_upper 31, VCPU_FPR31+8, a0
jr ra
nop
END(__kvm_restore_msa_upper)
LEAF(__kvm_restore_msacsr)
lw t0, VCPU_MSA_CSR(a0)
/*
* The ctcmsa must stay at this offset in __kvm_restore_msacsr.
* See kvm_mips_csr_die_notify() which handles t0 containing a value
* which triggers an MSA FP Exception, which must be stepped over and
* ignored since the set cause bits must remain there for the guest.
*/
_ctcmsa MSA_CSR, t0
jr ra
nop
END(__kvm_restore_msacsr)
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