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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 13:04:11 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 15:09:28 +0300 |
| commit | 5b0b14e550a006b4d093619e7517923872bcc218 (patch) | |
| tree | 377ee63c9a0f543145721409286e38bc59ec4511 /arch/loongarch/include/asm/percpu.h | |
| parent | f2ac457a61389b7769aad8295027cbe0f91c5b80 (diff) | |
| download | linux-5b0b14e550a006b4d093619e7517923872bcc218.tar.xz | |
LoongArch: Add atomic/locking headers
Add common headers (atomic, bitops, barrier and locking) for basic
LoongArch support.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/percpu.h')
| -rw-r--r-- | arch/loongarch/include/asm/percpu.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/percpu.h b/arch/loongarch/include/asm/percpu.h new file mode 100644 index 000000000000..b03d8f8b9fd3 --- /dev/null +++ b/arch/loongarch/include/asm/percpu.h @@ -0,0 +1,20 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2020-2022 Loongson Technology Corporation Limited + */ +#ifndef __ASM_PERCPU_H +#define __ASM_PERCPU_H + +/* Use r21 for fast access */ +register unsigned long __my_cpu_offset __asm__("$r21"); + +static inline void set_my_cpu_offset(unsigned long off) +{ + __my_cpu_offset = off; + csr_write64(off, PERCPU_BASE_KS); +} +#define __my_cpu_offset __my_cpu_offset + +#include <asm-generic/percpu.h> + +#endif /* __ASM_PERCPU_H */ |