9989f41fd3
- add arm64 dependent codes with GICv3 and SVE support - fix bugs based on architecture separation requests
127 lines
3.1 KiB
ArmAsm
127 lines
3.1 KiB
ArmAsm
/* entry-fpsimd.S COPYRIGHT FUJITSU LIMITED 2015-2017 */
|
|
|
|
#include <linkage.h>
|
|
#include <assembler.h>
|
|
#include <fpsimdmacros.h>
|
|
|
|
/*
|
|
* @ref.impl linux-linaro/arch/arm64/include/asm/fpsimdmacros.h
|
|
*/
|
|
/*
|
|
* FP/SIMD state saving and restoring macros
|
|
*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
* Author: Catalin Marinas <catalin.marinas@arm.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
.macro fpsimd_save state, tmpnr
|
|
stp q0, q1, [\state, #16 * 0]
|
|
stp q2, q3, [\state, #16 * 2]
|
|
stp q4, q5, [\state, #16 * 4]
|
|
stp q6, q7, [\state, #16 * 6]
|
|
stp q8, q9, [\state, #16 * 8]
|
|
stp q10, q11, [\state, #16 * 10]
|
|
stp q12, q13, [\state, #16 * 12]
|
|
stp q14, q15, [\state, #16 * 14]
|
|
stp q16, q17, [\state, #16 * 16]
|
|
stp q18, q19, [\state, #16 * 18]
|
|
stp q20, q21, [\state, #16 * 20]
|
|
stp q22, q23, [\state, #16 * 22]
|
|
stp q24, q25, [\state, #16 * 24]
|
|
stp q26, q27, [\state, #16 * 26]
|
|
stp q28, q29, [\state, #16 * 28]
|
|
stp q30, q31, [\state, #16 * 30]!
|
|
mrs x\tmpnr, fpsr
|
|
str w\tmpnr, [\state, #16 * 2]
|
|
mrs x\tmpnr, fpcr
|
|
str w\tmpnr, [\state, #16 * 2 + 4]
|
|
.endm
|
|
|
|
.macro fpsimd_restore_fpcr state, tmp
|
|
/*
|
|
* Writes to fpcr may be self-synchronising, so avoid restoring
|
|
* the register if it hasn't changed.
|
|
*/
|
|
mrs \tmp, fpcr
|
|
cmp \tmp, \state
|
|
b.eq 9999f
|
|
msr fpcr, \state
|
|
9999:
|
|
.endm
|
|
|
|
/* Clobbers \state */
|
|
.macro fpsimd_restore state, tmpnr
|
|
ldp q0, q1, [\state, #16 * 0]
|
|
ldp q2, q3, [\state, #16 * 2]
|
|
ldp q4, q5, [\state, #16 * 4]
|
|
ldp q6, q7, [\state, #16 * 6]
|
|
ldp q8, q9, [\state, #16 * 8]
|
|
ldp q10, q11, [\state, #16 * 10]
|
|
ldp q12, q13, [\state, #16 * 12]
|
|
ldp q14, q15, [\state, #16 * 14]
|
|
ldp q16, q17, [\state, #16 * 16]
|
|
ldp q18, q19, [\state, #16 * 18]
|
|
ldp q20, q21, [\state, #16 * 20]
|
|
ldp q22, q23, [\state, #16 * 22]
|
|
ldp q24, q25, [\state, #16 * 24]
|
|
ldp q26, q27, [\state, #16 * 26]
|
|
ldp q28, q29, [\state, #16 * 28]
|
|
ldp q30, q31, [\state, #16 * 30]!
|
|
ldr w\tmpnr, [\state, #16 * 2]
|
|
msr fpsr, x\tmpnr
|
|
ldr w\tmpnr, [\state, #16 * 2 + 4]
|
|
fpsimd_restore_fpcr x\tmpnr, \state
|
|
.endm
|
|
|
|
/*
|
|
* @ref.impl linux-linaro/arch/arm64/kernel/entry-fpsimd.S
|
|
*/
|
|
/*
|
|
* Save the FP registers.
|
|
*
|
|
* x0 - pointer to struct fpsimd_state
|
|
*/
|
|
ENTRY(fpsimd_save_state)
|
|
fpsimd_save x0, 8
|
|
ret
|
|
ENDPROC(fpsimd_save_state)
|
|
|
|
/*
|
|
* Load the FP registers.
|
|
*
|
|
* x0 - pointer to struct fpsimd_state
|
|
*/
|
|
ENTRY(fpsimd_load_state)
|
|
fpsimd_restore x0, 8
|
|
ret
|
|
ENDPROC(fpsimd_load_state)
|
|
|
|
#ifdef CONFIG_ARM64_SVE
|
|
ENTRY(sve_save_state)
|
|
sve_save 0, x1, 2
|
|
ret
|
|
ENDPROC(sve_save_state)
|
|
|
|
ENTRY(sve_load_state)
|
|
sve_load 0, x1, x2, 3
|
|
ret
|
|
ENDPROC(sve_load_state)
|
|
|
|
ENTRY(sve_get_vl)
|
|
_zrdvl 0, 1
|
|
ret
|
|
ENDPROC(sve_get_vl)
|
|
#endif /* CONFIG_ARM64_SVE */
|