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| author | Anup Patel <apatel@ventanamicro.com> | 2021-04-06 10:36:47 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-02-15 18:02:42 +0300 |
| commit | 8f9607006789512ceae703e82e62566873a83aaa (patch) | |
| tree | 9a8f507f7849662b226c4421d07777e0995c30d0 | |
| parent | 01250d00447d3838e31c1fc67ce3acb1dd6b2682 (diff) | |
| download | opensbi-8f9607006789512ceae703e82e62566873a83aaa.tar.xz | |
lib: sbi: Detect AIA CSRs at boot-time
We extend HART feature detection to discover AIA CSRs at boot-time.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
| -rw-r--r-- | include/sbi/sbi_hart.h | 4 | ||||
| -rw-r--r-- | lib/sbi/sbi_hart.c | 11 |
2 files changed, 14 insertions, 1 deletions
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h index d2db9d6..a83b45b 100644 --- a/include/sbi/sbi_hart.h +++ b/include/sbi/sbi_hart.h @@ -24,9 +24,11 @@ enum sbi_hart_features { SBI_HART_HAS_SSCOFPMF = (1 << 3), /** HART has timer csr implementation in hardware */ SBI_HART_HAS_TIME = (1 << 4), + /** HART has AIA local interrupt CSRs */ + SBI_HART_HAS_AIA = (1 << 5), /** Last index of Hart features*/ - SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_TIME, + SBI_HART_HAS_LAST_FEATURE = SBI_HART_HAS_AIA, }; struct sbi_scratch; diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index 36908b1..e028540 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -301,6 +301,9 @@ static inline char *sbi_hart_feature_id2string(unsigned long feature) case SBI_HART_HAS_TIME: fstr = "time"; break; + case SBI_HART_HAS_AIA: + fstr = "aia"; + break; default: break; } @@ -524,6 +527,14 @@ __mhpm_skip: csr_read_allowed(CSR_TIME, (unsigned long)&trap); if (!trap.cause) hfeatures->features |= SBI_HART_HAS_TIME; + + /* Detect if hart has AIA local interrupt CSRs */ + csr_read_allowed(CSR_MTOPI, (unsigned long)&trap); + if (trap.cause) + goto __aia_skip; + hfeatures->features |= SBI_HART_HAS_AIA; +__aia_skip: + return; } int sbi_hart_reinit(struct sbi_scratch *scratch) |