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lib: sbi: Detect Smstateen CSRs at boot-time

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Extend HART feature detection to discover Smstateen CSRs at boot-time
and configure mstateen envcfg bit depending on availability of
menvcfg CSR.

Signed-off-by: Mayuresh Chitale <mchitale@ventanamicro.com>
Reviewed-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Mayuresh Chitale
2022-04-11 08:34:10 +05:30
committed by Anup Patel
parent 499601a4ff
commit d44568a0f2
2 changed files with 28 additions and 1 deletions
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4
include/sbi/sbi_hart.h
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@@ -28,9 +28,11 @@ enum sbi_hart_features {
SBI_HART_HAS_AIA = (1 << 5),
/** HART has menvcfg CSR */
SBI_HART_HAS_MENVCFG = (1 << 6),
/** HART has mstateen CSR **/
SBI_HART_HAS_SMSTATEEN = (1 << 7),
/** Last index of Hart features*/
SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_MENVCFG,
SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_SMSTATEEN,
};
struct sbi_scratch;