diff options
| author | Anup Patel <apatel@ventanamicro.com> | 2022-04-29 18:32:24 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2022-05-07 07:47:28 +0300 |
| commit | 023f0ad2d9c1039c0538620aa26c4680e3bfd9c9 (patch) | |
| tree | 46c9ab9941d0963a43e4f17ca818f9559e91af2f /lib/sbi | |
| parent | 994ace30f7c83f0cf9bd1b27a8bf15e0c0d5f9b6 (diff) | |
| download | opensbi-023f0ad2d9c1039c0538620aa26c4680e3bfd9c9.tar.xz | |
lib: sbi_platform: Add callback to populate HART extensions
We add platform specific extensions_init() callback which allows
platforms to populate HART extensions for each HART. For example,
the generic platform can populate HART extensions from HART ISA
string described in DeviceTree.
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Diffstat (limited to 'lib/sbi')
| -rw-r--r-- | lib/sbi/sbi_hart.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index de08f9e..de86fee 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -536,16 +536,17 @@ static int hart_pmu_get_allowed_bits(void) return num_bits; } -static void hart_detect_features(struct sbi_scratch *scratch) +static int hart_detect_features(struct sbi_scratch *scratch) { struct sbi_trap_info trap = {0}; struct hart_features *hfeatures = sbi_scratch_offset_ptr(scratch, hart_features_offset); unsigned long val, oldval; + int rc; /* If hart features already detected then do nothing */ if (hfeatures->detected) - return; + return 0; /* Clear hart features */ hfeatures->extensions = 0; @@ -680,10 +681,15 @@ __mhpm_skip: SBI_HART_EXT_SMSTATEEN, true); } + /* Let platform populate extensions */ + rc = sbi_platform_extensions_init(sbi_platform_thishart_ptr()); + if (rc) + return rc; + /* Mark hart feature detection done */ hfeatures->detected = true; - return; + return 0; } int sbi_hart_reinit(struct sbi_scratch *scratch) @@ -705,6 +711,8 @@ int sbi_hart_reinit(struct sbi_scratch *scratch) int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot) { + int rc; + if (cold_boot) { if (misa_extension('H')) sbi_hart_expected_trap = &__sbi_expected_trap_hext; @@ -715,7 +723,9 @@ int sbi_hart_init(struct sbi_scratch *scratch, bool cold_boot) return SBI_ENOMEM; } - hart_detect_features(scratch); + rc = hart_detect_features(scratch); + if (rc) + return rc; return sbi_hart_reinit(scratch); } |