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lib: sbi: Add sbi_pmp_is_enabled() helper

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Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260430045528.420437-7-npiggin@gmail.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Nicholas Piggin
2026-04-30 14:55:23 +10:00
committed by Anup Patel
parent 8f1a6164f2
commit f7738cc1e5
3 changed files with 11 additions and 5 deletions
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include/sbi/sbi_pmp.h
+1
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@@ -14,6 +14,7 @@ struct pmp {
}; };
typedef struct pmp pmp_t; typedef struct pmp pmp_t;
bool sbi_pmp_is_enabled(pmp_t *pmp);
int sbi_pmp_encode(pmp_t *pmp, unsigned long prot, unsigned long addr, int sbi_pmp_encode(pmp_t *pmp, unsigned long prot, unsigned long addr,
unsigned long log2len); unsigned long log2len);
int sbi_pmp_decode(pmp_t *pmp, unsigned long *prot, unsigned long *addr, int sbi_pmp_decode(pmp_t *pmp, unsigned long *prot, unsigned long *addr,
lib/sbi/riscv_asm.c
+1 -5
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@@ -353,11 +353,7 @@ int is_pmp_entry_mapped(unsigned long entry)
if (hart_pmp_read(&pmp, entry) != SBI_OK) if (hart_pmp_read(&pmp, entry) != SBI_OK)
return false; return false;
/* If address matching bits are non-zero, the entry is enable */ return sbi_pmp_is_enabled(&pmp);
if (pmp.cfg & PMP_A)
return true;
return false;
} }
int pmp_set(unsigned int n, unsigned long prot, unsigned long addr, int pmp_set(unsigned int n, unsigned long prot, unsigned long addr,
lib/sbi/sbi_pmp.c
+9
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@@ -28,6 +28,15 @@ static unsigned long ctz(unsigned long x)
return ret; return ret;
} }
bool sbi_pmp_is_enabled(pmp_t *pmp)
{
/* If address matching bits are non-zero, the entry is enable */
if (pmp->cfg & PMP_A)
return true;
return false;
}
int sbi_pmp_encode(pmp_t *pmp, unsigned long prot, unsigned long addr, int sbi_pmp_encode(pmp_t *pmp, unsigned long prot, unsigned long addr,
unsigned long log2len) unsigned long log2len)
{ {