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- /* SPDX-License-Identifier: GPL-2.0+ */
- #include <linux/linkage.h>
- #include <asm/stackframe.h>
- .text
- .macro save_all_base_regs
- cfi_st ra, PT_R1
- cfi_st tp, PT_R2
- cfi_st a0, PT_R4
- cfi_st a1, PT_R5
- cfi_st a2, PT_R6
- cfi_st a3, PT_R7
- cfi_st a4, PT_R8
- cfi_st a5, PT_R9
- cfi_st a6, PT_R10
- cfi_st a7, PT_R11
- cfi_st t0, PT_R12
- cfi_st t1, PT_R13
- cfi_st t2, PT_R14
- cfi_st t3, PT_R15
- cfi_st t4, PT_R16
- cfi_st t5, PT_R17
- cfi_st t6, PT_R18
- cfi_st t7, PT_R19
- cfi_st t8, PT_R20
- cfi_st u0, PT_R21
- cfi_st fp, PT_R22
- cfi_st s0, PT_R23
- cfi_st s1, PT_R24
- cfi_st s2, PT_R25
- cfi_st s3, PT_R26
- cfi_st s4, PT_R27
- cfi_st s5, PT_R28
- cfi_st s6, PT_R29
- cfi_st s7, PT_R30
- cfi_st s8, PT_R31
- csrrd t0, LOONGARCH_CSR_CRMD
- andi t0, t0, 0x7 /* extract bit[1:0] PLV, bit[2] IE */
- LONG_S t0, sp, PT_CRMD
- .endm
- .macro restore_all_base_regs
- cfi_ld tp, PT_R2
- cfi_ld a0, PT_R4
- cfi_ld a1, PT_R5
- cfi_ld a2, PT_R6
- cfi_ld a3, PT_R7
- cfi_ld a4, PT_R8
- cfi_ld a5, PT_R9
- cfi_ld a6, PT_R10
- cfi_ld a7, PT_R11
- cfi_ld t0, PT_R12
- cfi_ld t1, PT_R13
- cfi_ld t2, PT_R14
- cfi_ld t3, PT_R15
- cfi_ld t4, PT_R16
- cfi_ld t5, PT_R17
- cfi_ld t6, PT_R18
- cfi_ld t7, PT_R19
- cfi_ld t8, PT_R20
- cfi_ld u0, PT_R21
- cfi_ld fp, PT_R22
- cfi_ld s0, PT_R23
- cfi_ld s1, PT_R24
- cfi_ld s2, PT_R25
- cfi_ld s3, PT_R26
- cfi_ld s4, PT_R27
- cfi_ld s5, PT_R28
- cfi_ld s6, PT_R29
- cfi_ld s7, PT_R30
- cfi_ld s8, PT_R31
- LONG_L t0, sp, PT_CRMD
- li.d t1, 0x7 /* mask bit[1:0] PLV, bit[2] IE */
- csrxchg t0, t1, LOONGARCH_CSR_CRMD
- .endm
- SYM_CODE_START(arch_rethook_trampoline)
- UNWIND_HINT_UNDEFINED
- addi.d sp, sp, -PT_SIZE
- save_all_base_regs
- addi.d t0, sp, PT_SIZE
- LONG_S t0, sp, PT_R3
- move a0, sp /* pt_regs */
- bl arch_rethook_trampoline_callback
- /* use the result as the return-address */
- move ra, a0
- restore_all_base_regs
- addi.d sp, sp, PT_SIZE
- jr ra
- SYM_CODE_END(arch_rethook_trampoline)
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