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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-12-10 17:39:59 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-12-14 03:36:11 +0300 |
| commit | 61a6fccc0bd2e8030b2672a52ef3f6706b2b2ee4 (patch) | |
| tree | 7f10ae1216e9e65ec4a5770a168adbe0e725f479 /arch/loongarch/include | |
| parent | dbcd7f5fafea64dbe588c4ec18bc309fde5d1e1c (diff) | |
| download | linux-61a6fccc0bd2e8030b2672a52ef3f6706b2b2ee4.tar.xz | |
LoongArch: Add unaligned access support
Loongson-2 series (Loongson-2K500, Loongson-2K1000) don't support
unaligned access in hardware, while Loongson-3 series (Loongson-3A5000,
Loongson-3C5000) are configurable whether support unaligned access in
hardware. This patch add unaligned access emulation for those LoongArch
processors without hardware support.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include')
| -rw-r--r-- | arch/loongarch/include/asm/inst.h | 14 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/thread_info.h | 2 |
2 files changed, 15 insertions, 1 deletions
diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index fce1843ceebb..889d6c9fc2b6 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -76,6 +76,10 @@ enum reg2i12_op { ldbu_op = 0xa8, ldhu_op = 0xa9, ldwu_op = 0xaa, + flds_op = 0xac, + fsts_op = 0xad, + fldd_op = 0xae, + fstd_op = 0xaf, }; enum reg2i14_op { @@ -146,6 +150,10 @@ enum reg3_op { ldxbu_op = 0x7040, ldxhu_op = 0x7048, ldxwu_op = 0x7050, + fldxs_op = 0x7060, + fldxd_op = 0x7068, + fstxs_op = 0x7070, + fstxd_op = 0x7078, amswapw_op = 0x70c0, amswapd_op = 0x70c1, amaddw_op = 0x70c2, @@ -566,4 +574,10 @@ static inline void emit_##NAME(union loongarch_instruction *insn, \ DEF_EMIT_REG3SA2_FORMAT(alsld, alsld_op) +struct pt_regs; + +void emulate_load_store_insn(struct pt_regs *regs, void __user *addr, unsigned int *pc); +unsigned long unaligned_read(void __user *addr, void *value, unsigned long n, bool sign); +unsigned long unaligned_write(void __user *addr, unsigned long value, unsigned long n); + #endif /* _ASM_INST_H */ diff --git a/arch/loongarch/include/asm/thread_info.h b/arch/loongarch/include/asm/thread_info.h index b7dd9f19a5a9..1a3354ca056e 100644 --- a/arch/loongarch/include/asm/thread_info.h +++ b/arch/loongarch/include/asm/thread_info.h @@ -38,7 +38,7 @@ struct thread_info { #define INIT_THREAD_INFO(tsk) \ { \ .task = &tsk, \ - .flags = 0, \ + .flags = _TIF_FIXADE, \ .cpu = 0, \ .preempt_count = INIT_PREEMPT_COUNT, \ } |