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lib: sbi_hart: Detect number of supported PMP regions

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It is not mandatory for a RISC-V systems to implement all PMP
regions so we have to check all PMPADDRx CSRs to determine excat
number of supported PMP regions.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Anup Patel
2020-05-18 12:04:18 +05:30
committed by Anup Patel
parent 2966510eed
commit a38bea9341
4 changed files with 103 additions and 52 deletions
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4
include/sbi/sbi_hart.h
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@@ -38,6 +38,10 @@ static inline ulong sbi_hart_expected_trap_addr(void)
}
void sbi_hart_delegation_dump(struct sbi_scratch *scratch);
unsigned int sbi_hart_pmp_count(struct sbi_scratch *scratch);
int sbi_hart_pmp_get(struct sbi_scratch *scratch, unsigned int n,
unsigned long *prot_out, unsigned long *addr_out,
unsigned long *size);
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);