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>
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;
case SBI_HART_HAS_TIME:
fstr = "time";
break;
+ case SBI_HART_HAS_AIA:
+ fstr = "aia";
+ break;
default:
break;
}
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)