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LoongArch: Replace hard-coded values in comments with VALEN

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According to LoongArch documentation [1], CSR.PGDL and CSR.PGDH are
concerned with the VA's MSB which is VALEN-1 instead of always being 47.
Fix comments to avoid misleading others.

[1] https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#page-global-directory-base-address-for-lower-half-address-space

Reviewed-by: WANG Xuerui <git@xen0n.name>
Signed-off-by: Enze Li <lienze@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Enze Li 2023-04-19 12:07:27 +08:00 committed by Huacai Chen
parent afca6e0649
commit 213ef669d1
1 changed files with 2 additions and 2 deletions
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4
arch/loongarch/include/asm/loongarch.h
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@ -423,9 +423,9 @@ static __always_inline void iocsr_write64(u64 val, u32 reg)
#define CSR_ASID_ASID_WIDTH 10
#define CSR_ASID_ASID (_ULCAST_(0x3ff) << CSR_ASID_ASID_SHIFT)
#define LOONGARCH_CSR_PGDL 0x19 /* Page table base address when VA[47] = 0 */
#define LOONGARCH_CSR_PGDL 0x19 /* Page table base address when VA[VALEN-1] = 0 */
#define LOONGARCH_CSR_PGDH 0x1a /* Page table base address when VA[47] = 1 */
#define LOONGARCH_CSR_PGDH 0x1a /* Page table base address when VA[VALEN-1] = 1 */
#define LOONGARCH_CSR_PGD 0x1b /* Page table base */