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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*
* Derived from MIPS:
* Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Copyright (C) 2002, 2007 Maciej W. Rozycki
* Copyright (C) 2001, 2012 MIPS Technologies, Inc. All rights reserved.
*/
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/loongarch.h>
#include <asm/regdef.h>
#include <asm/fpregdef.h>
#include <asm/stackframe.h>
#include <asm/thread_info.h>
.align 5
SYM_FUNC_START(__arch_cpu_idle)
/* start of rollback region */
LONG_L t0, tp, TI_FLAGS
nop
andi t0, t0, _TIF_NEED_RESCHED
bnez t0, 1f
nop
nop
nop
idle 0
/* end of rollback region */
1: jr ra
SYM_FUNC_END(__arch_cpu_idle)
SYM_CODE_START(handle_vint)
UNWIND_HINT_UNDEFINED
BACKUP_T0T1
SAVE_ALL
la_abs t1, __arch_cpu_idle
LONG_L t0, sp, PT_ERA
/* 32 byte rollback region */
ori t0, t0, 0x1f
xori t0, t0, 0x1f
bne t0, t1, 1f
LONG_S t0, sp, PT_ERA
1: move a0, sp
move a1, sp
la_abs t0, do_vint
jirl ra, t0, 0
RESTORE_ALL_AND_RET
SYM_CODE_END(handle_vint)
SYM_CODE_START(except_vec_cex)
UNWIND_HINT_UNDEFINED
b cache_parity_error
SYM_CODE_END(except_vec_cex)
.macro build_prep_badv
csrrd t0, LOONGARCH_CSR_BADV
PTR_S t0, sp, PT_BVADDR
.endm
.macro build_prep_fcsr
movfcsr2gr a1, fcsr0
.endm
.macro build_prep_none
.endm
.macro BUILD_HANDLER exception handler prep
.align 5
SYM_CODE_START(handle_\exception)
UNWIND_HINT_UNDEFINED
666:
BACKUP_T0T1
SAVE_ALL
build_prep_\prep
move a0, sp
la_abs t0, do_\handler
jirl ra, t0, 0
668:
RESTORE_ALL_AND_RET
SYM_CODE_END(handle_\exception)
.pushsection ".data", "aw", %progbits
SYM_DATA(unwind_hint_\exception, .word 668b - 666b)
.popsection
.endm
BUILD_HANDLER ade ade badv
BUILD_HANDLER ale ale badv
BUILD_HANDLER bce bce none
BUILD_HANDLER bp bp none
BUILD_HANDLER fpe fpe fcsr
BUILD_HANDLER fpu fpu none
BUILD_HANDLER lsx lsx none
BUILD_HANDLER lasx lasx none
BUILD_HANDLER lbt lbt none
BUILD_HANDLER ri ri none
BUILD_HANDLER watch watch none
BUILD_HANDLER reserved reserved none /* others */
SYM_CODE_START(handle_sys)
UNWIND_HINT_UNDEFINED
la_abs t0, handle_syscall
jr t0
SYM_CODE_END(handle_sys)
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