diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2025-12-08 18:09:17 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2025-12-08 18:09:17 +0800 |
| commit | b15dfdacd99dc0014413c71bc1157fc4e895ce68 (patch) | |
| tree | f3fa2b560f32667b489f4e04217283f2d636408c /arch/loongarch/lib | |
| parent | 48c7294775be0f17ffd8a7d5ef0df3ab5e696ab4 (diff) | |
LoongArch: Adjust misc routines for 32BIT/64BIT
Adjust misc routines for both 32BIT and 64BIT, including: bitops, bswap,
checksum, string, jump label, unaligned access emulator, suspend/wakeup
routines, etc.
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/lib')
| -rw-r--r-- | arch/loongarch/lib/bswapdi.c | 13 | ||||
| -rw-r--r-- | arch/loongarch/lib/bswapsi.c | 13 | ||||
| -rw-r--r-- | arch/loongarch/lib/unaligned.S | 72 |
3 files changed, 62 insertions, 36 deletions
diff --git a/arch/loongarch/lib/bswapdi.c b/arch/loongarch/lib/bswapdi.c new file mode 100644 index 000000000000..88242dc7de17 --- /dev/null +++ b/arch/loongarch/lib/bswapdi.c @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/export.h> +#include <linux/compiler.h> +#include <uapi/linux/swab.h> + +/* To silence -Wmissing-prototypes. */ +unsigned long long __bswapdi2(unsigned long long u); + +unsigned long long notrace __bswapdi2(unsigned long long u) +{ + return ___constant_swab64(u); +} +EXPORT_SYMBOL(__bswapdi2); diff --git a/arch/loongarch/lib/bswapsi.c b/arch/loongarch/lib/bswapsi.c new file mode 100644 index 000000000000..2ed655497de5 --- /dev/null +++ b/arch/loongarch/lib/bswapsi.c @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/export.h> +#include <linux/compiler.h> +#include <uapi/linux/swab.h> + +/* To silence -Wmissing-prototypes. */ +unsigned int __bswapsi2(unsigned int u); + +unsigned int notrace __bswapsi2(unsigned int u) +{ + return ___constant_swab32(u); +} +EXPORT_SYMBOL(__bswapsi2); diff --git a/arch/loongarch/lib/unaligned.S b/arch/loongarch/lib/unaligned.S index 185f82d85810..470c0bfa3463 100644 --- a/arch/loongarch/lib/unaligned.S +++ b/arch/loongarch/lib/unaligned.S @@ -24,35 +24,35 @@ * a3: sign */ SYM_FUNC_START(unaligned_read) - beqz a2, 5f + beqz a2, 5f - li.w t2, 0 - addi.d t0, a2, -1 - slli.d t1, t0, 3 - add.d a0, a0, t0 + li.w t2, 0 + LONG_ADDI t0, a2, -1 + PTR_SLLI t1, t0, LONGLOG + PTR_ADD a0, a0, t0 - beqz a3, 2f -1: ld.b t3, a0, 0 - b 3f + beqz a3, 2f +1: ld.b t3, a0, 0 + b 3f -2: ld.bu t3, a0, 0 -3: sll.d t3, t3, t1 - or t2, t2, t3 - addi.d t1, t1, -8 - addi.d a0, a0, -1 - addi.d a2, a2, -1 - bgtz a2, 2b -4: st.d t2, a1, 0 +2: ld.bu t3, a0, 0 +3: LONG_SLLV t3, t3, t1 + or t2, t2, t3 + LONG_ADDI t1, t1, -8 + PTR_ADDI a0, a0, -1 + PTR_ADDI a2, a2, -1 + bgtz a2, 2b +4: LONG_S t2, a1, 0 - move a0, a2 - jr ra + move a0, a2 + jr ra -5: li.w a0, -EFAULT - jr ra +5: li.w a0, -EFAULT + jr ra - _asm_extable 1b, .L_fixup_handle_unaligned - _asm_extable 2b, .L_fixup_handle_unaligned - _asm_extable 4b, .L_fixup_handle_unaligned + _asm_extable 1b, .L_fixup_handle_unaligned + _asm_extable 2b, .L_fixup_handle_unaligned + _asm_extable 4b, .L_fixup_handle_unaligned SYM_FUNC_END(unaligned_read) /* @@ -63,21 +63,21 @@ SYM_FUNC_END(unaligned_read) * a2: n */ SYM_FUNC_START(unaligned_write) - beqz a2, 3f + beqz a2, 3f - li.w t0, 0 -1: srl.d t1, a1, t0 -2: st.b t1, a0, 0 - addi.d t0, t0, 8 - addi.d a2, a2, -1 - addi.d a0, a0, 1 - bgtz a2, 1b + li.w t0, 0 +1: LONG_SRLV t1, a1, t0 +2: st.b t1, a0, 0 + LONG_ADDI t0, t0, 8 + PTR_ADDI a2, a2, -1 + PTR_ADDI a0, a0, 1 + bgtz a2, 1b - move a0, a2 - jr ra + move a0, a2 + jr ra -3: li.w a0, -EFAULT - jr ra +3: li.w a0, -EFAULT + jr ra - _asm_extable 2b, .L_fixup_handle_unaligned + _asm_extable 2b, .L_fixup_handle_unaligned SYM_FUNC_END(unaligned_write) |