projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 0603839b HC |
1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* | |
| 3 | * Copyright (C) 2020-2022 Loongson Technology Corporation Limited | |
| 4 | * | |
| 5 | * Derived from MIPS: | |
| 6 | * Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle | |
| 7 | * Copyright (C) 1999, 2000 Silicon Graphics, Inc. | |
| 8 | * Copyright (C) 2002, 2007 Maciej W. Rozycki | |
| 9 | * Copyright (C) 2001, 2012 MIPS Technologies, Inc. All rights reserved. | |
| 10 | */ | |
| 11 | #include <asm/asm.h> | |
| 12 | #include <asm/asmmacro.h> | |
| 13 | #include <asm/loongarch.h> | |
| 14 | #include <asm/regdef.h> | |
| 15 | #include <asm/fpregdef.h> | |
| 16 | #include <asm/stackframe.h> | |
| 17 | #include <asm/thread_info.h> | |
| 18 | ||
| 19 | .align 5 | |
| 20 | SYM_FUNC_START(__arch_cpu_idle) | |
| 21 | /* start of rollback region */ | |
| 22 | LONG_L t0, tp, TI_FLAGS | |
| 23 | nop | |
| 24 | andi t0, t0, _TIF_NEED_RESCHED | |
| 25 | bnez t0, 1f | |
| 26 | nop | |
| 27 | nop | |
| 28 | nop | |
| 29 | idle 0 | |
| 30 | /* end of rollback region */ | |
| 07b48069 | 31 | 1: jr ra |
| 0603839b HC |
32 | SYM_FUNC_END(__arch_cpu_idle) |
| 33 | ||
| 34 | SYM_FUNC_START(handle_vint) | |
| 35 | BACKUP_T0T1 | |
| 36 | SAVE_ALL | |
| 37 | la.abs t1, __arch_cpu_idle | |
| f5c3c22f | 38 | LONG_L t0, sp, PT_ERA |
| 0603839b HC |
39 | /* 32 byte rollback region */ |
| 40 | ori t0, t0, 0x1f | |
| 41 | xori t0, t0, 0x1f | |
| 42 | bne t0, t1, 1f | |
| f5c3c22f | 43 | LONG_S t0, sp, PT_ERA |
| 0603839b HC |
44 | 1: move a0, sp |
| 45 | move a1, sp | |
| 46 | la.abs t0, do_vint | |
| f5c3c22f | 47 | jirl ra, t0, 0 |
| 0603839b HC |
48 | RESTORE_ALL_AND_RET |
| 49 | SYM_FUNC_END(handle_vint) | |
| 50 | ||
| 51 | SYM_FUNC_START(except_vec_cex) | |
| 52 | b cache_parity_error | |
| 53 | SYM_FUNC_END(except_vec_cex) | |
| 54 | ||
| 55 | .macro build_prep_badv | |
| 56 | csrrd t0, LOONGARCH_CSR_BADV | |
| 57 | PTR_S t0, sp, PT_BVADDR | |
| 58 | .endm | |
| 59 | ||
| 60 | .macro build_prep_fcsr | |
| 61 | movfcsr2gr a1, fcsr0 | |
| 62 | .endm | |
| 63 | ||
| 64 | .macro build_prep_none | |
| 65 | .endm | |
| 66 | ||
| 67 | .macro BUILD_HANDLER exception handler prep | |
| 68 | .align 5 | |
| 69 | SYM_FUNC_START(handle_\exception) | |
| dc74a9e8 | 70 | 666: |
| 0603839b HC |
71 | BACKUP_T0T1 |
| 72 | SAVE_ALL | |
| 73 | build_prep_\prep | |
| 74 | move a0, sp | |
| 75 | la.abs t0, do_\handler | |
| f5c3c22f | 76 | jirl ra, t0, 0 |
| dc74a9e8 | 77 | 668: |
| 0603839b HC |
78 | RESTORE_ALL_AND_RET |
| 79 | SYM_FUNC_END(handle_\exception) | |
| dc74a9e8 | 80 | SYM_DATA(unwind_hint_\exception, .word 668b - 666b) |
| 0603839b HC |
81 | .endm |
| 82 | ||
| 83 | BUILD_HANDLER ade ade badv | |
| 84 | BUILD_HANDLER ale ale badv | |
| 85 | BUILD_HANDLER bp bp none | |
| 86 | BUILD_HANDLER fpe fpe fcsr | |
| 87 | BUILD_HANDLER fpu fpu none | |
| 88 | BUILD_HANDLER lsx lsx none | |
| 89 | BUILD_HANDLER lasx lasx none | |
| 90 | BUILD_HANDLER lbt lbt none | |
| 91 | BUILD_HANDLER ri ri none | |
| 92 | BUILD_HANDLER watch watch none | |
| 93 | BUILD_HANDLER reserved reserved none /* others */ | |
| 94 | ||
| 95 | SYM_FUNC_START(handle_sys) | |
| 96 | la.abs t0, handle_syscall | |
| 07b48069 | 97 | jr t0 |
| 0603839b | 98 | SYM_FUNC_END(handle_sys) |