diff options
Diffstat (limited to 'lib/sbi/sbi_hart.c')
| -rw-r--r-- | lib/sbi/sbi_hart.c | 52 |
1 files changed, 46 insertions, 6 deletions
diff --git a/lib/sbi/sbi_hart.c b/lib/sbi/sbi_hart.c index 229c14a..ed4e631 100644 --- a/lib/sbi/sbi_hart.c +++ b/lib/sbi/sbi_hart.c @@ -28,6 +28,7 @@ extern void __sbi_expected_trap_hext(void); void (*sbi_hart_expected_trap)(void) = &__sbi_expected_trap; struct hart_features { + int priv_version; unsigned long features; unsigned int pmp_count; unsigned int pmp_addr_bits; @@ -334,6 +335,39 @@ int sbi_hart_pmp_configure(struct sbi_scratch *scratch) return 0; } +int sbi_hart_priv_version(struct sbi_scratch *scratch) +{ + struct hart_features *hfeatures = + sbi_scratch_offset_ptr(scratch, hart_features_offset); + + return hfeatures->priv_version; +} + +void sbi_hart_get_priv_version_str(struct sbi_scratch *scratch, + char *version_str, int nvstr) +{ + char *temp; + struct hart_features *hfeatures = + sbi_scratch_offset_ptr(scratch, hart_features_offset); + + switch (hfeatures->priv_version) { + case SBI_HART_PRIV_VER_1_10: + temp = "v1.10"; + break; + case SBI_HART_PRIV_VER_1_11: + temp = "v1.11"; + break; + case SBI_HART_PRIV_VER_1_12: + temp = "v1.12"; + break; + default: + temp = "unknown"; + break; + } + + sbi_snprintf(version_str, nvstr, "%s", temp); +} + /** * Check whether a particular hart feature is available * @@ -583,6 +617,7 @@ __mhpm_skip: /* Detect if hart supports SCOUNTEREN feature */ val = csr_read_allowed(CSR_SCOUNTEREN, (unsigned long)&trap); if (!trap.cause) { + hfeatures->priv_version = SBI_HART_PRIV_VER_1_10; csr_write_allowed(CSR_SCOUNTEREN, (unsigned long)&trap, val); if (!trap.cause) hfeatures->features |= SBI_HART_HAS_SCOUNTEREN; @@ -591,6 +626,7 @@ __mhpm_skip: /* Detect if hart supports MCOUNTEREN feature */ val = csr_read_allowed(CSR_MCOUNTEREN, (unsigned long)&trap); if (!trap.cause) { + hfeatures->priv_version = SBI_HART_PRIV_VER_1_10; csr_write_allowed(CSR_MCOUNTEREN, (unsigned long)&trap, val); if (!trap.cause) hfeatures->features |= SBI_HART_HAS_MCOUNTEREN; @@ -600,8 +636,17 @@ __mhpm_skip: val = csr_read_allowed(CSR_MCOUNTINHIBIT, (unsigned long)&trap); if (!trap.cause) { csr_write_allowed(CSR_MCOUNTINHIBIT, (unsigned long)&trap, val); - if (!trap.cause) + if (!trap.cause) { + hfeatures->priv_version = SBI_HART_PRIV_VER_1_11; hfeatures->features |= SBI_HART_HAS_MCOUNTINHIBIT; + } + } + + /* Detect if hart has menvcfg CSR */ + csr_read_allowed(CSR_MENVCFG, (unsigned long)&trap); + if (!trap.cause) { + hfeatures->priv_version = SBI_HART_PRIV_VER_1_12; + hfeatures->features |= SBI_HART_HAS_MENVCFG; } /* Counter overflow/filtering is not useful without mcounter/inhibit */ @@ -625,11 +670,6 @@ __mhpm_skip: hfeatures->features |= SBI_HART_HAS_AIA; __aia_skip: - /* Detect if hart has menvcfg CSR */ - csr_read_allowed(CSR_MENVCFG, (unsigned long)&trap); - if (!trap.cause) - hfeatures->features |= SBI_HART_HAS_MENVCFG; - /** * Detect if hart supports stimecmp CSR(Sstc extension) and menvcfg is * implemented. |