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| author | Atish Patra <atish.patra@wdc.com> | 2020-10-27 00:03:33 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2020-10-26 20:14:52 +0300 |
| commit | bf21632860b4e9974967765b747d1d4b7df346bb (patch) | |
| tree | 802fe3da70a95a958e44ea0a4529cdb5452cec76 /include | |
| parent | 74c0ea1e835de38e13be7c8e6440bde94bcc07d0 (diff) | |
| download | opensbi-bf21632860b4e9974967765b747d1d4b7df346bb.tar.xz | |
lib: sbi: Detect PMP granularity and number of address bits
As per RISC-V privilege specification, a platform may choose to implement
a coarser granularity scheme for PMP addresses. In that case, we shouldn't
allow any pmp region size smaller than the platform supports. A platform
may not also implement all the bits for a PMP address specified in the priv
specification.
The pmp range granularity and address bits should be detected dynamically
before detecing PMP regions. Any pmp modification request beyond these detected
value must not succeed.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/sbi/sbi_hart.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/sbi/sbi_hart.h b/include/sbi/sbi_hart.h index 3ac1500..ec9e30f 100644 --- a/include/sbi/sbi_hart.h +++ b/include/sbi/sbi_hart.h @@ -39,6 +39,8 @@ unsigned int sbi_hart_mhpm_count(struct sbi_scratch *scratch); void sbi_hart_delegation_dump(struct sbi_scratch *scratch, const char *prefix, const char *suffix); unsigned int sbi_hart_pmp_count(struct sbi_scratch *scratch); +unsigned long sbi_hart_pmp_granularity(struct sbi_scratch *scratch); +unsigned int sbi_hart_pmp_addrbits(struct sbi_scratch *scratch); int sbi_hart_pmp_configure(struct sbi_scratch *scratch); bool sbi_hart_has_feature(struct sbi_scratch *scratch, unsigned long feature); void sbi_hart_get_features_str(struct sbi_scratch *scratch, |