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| author | Atish Patra <atish.patra@wdc.com> | 2020-05-10 02:47:28 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-05-10 07:35:41 +0300 |
| commit | b2df751acfd2858f2370d896f91543593647b243 (patch) | |
| tree | 75bb454392222a4686dbf12191ce3831738662d6 /include/sbi/sbi_hart.h | |
| parent | 6a053f6e6cb4db8a291239e882e9a778c2738e0a (diff) | |
| download | opensbi-b2df751acfd2858f2370d896f91543593647b243.tar.xz | |
platform: Move platform features to hart
PMP & performance counters belong to a hart rather than a platform.
In addition to that, these features enable reading/writing from a
particular csr. Thus, they can be detected and set at runtime rather
than compile time.
Move PMP/MCOUNTEREN/SCOUNTEREN features to hart and detect them at runtime.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Tested-by: Jonathan Balkind <jbalkind@cs.princeton.edu>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'include/sbi/sbi_hart.h')
| -rw-r--r-- | include/sbi/sbi_hart.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h index e285bdf..f7870d9 100644 --- a/include/sbi/sbi_hart.h +++ b/include/sbi/sbi_hart.h @@ -12,6 +12,16 @@ #include <sbi/sbi_types.h> +/** Possible feature flags of a hart */ +enum sbi_hart_features { + /** Hart has PMP support */ + SBI_HART_HAS_PMP = (1 << 0), + /** Hart has S-mode counter enable */ + SBI_HART_HAS_SCOUNTEREN = (1 << 1), + /** Hart has M-mode counter enable */ + SBI_HART_HAS_MCOUNTEREN = (1 << 2), +}; + struct sbi_scratch; int sbi_hart_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot); @@ -27,6 +37,7 @@ void sbi_hart_pmp_dump(struct sbi_scratch *scratch); int sbi_hart_pmp_check_addr(struct sbi_scratch *scratch, unsigned long daddr, unsigned long attr); bool sbi_hart_has_feature(u32 hartid, unsigned long feature); +unsigned long sbi_hart_get_features(u32 hartid); void __attribute__((noreturn)) sbi_hart_hang(void); |