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lib: sbi: clear pmpcfg.A before setting in pmp_set()

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We should clear A bits in prot variable before enabling A_NA4 or A_NAPOT.

Signed-off-by: Xiang W <wxjstz@126.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Xiang W
2021-11-08 17:43:03 +08:00
committed by Anup Patel
parent f3744967c6
commit d335a178d8
1 changed files with 1 additions and 0 deletions
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lib/sbi/riscv_asm.c
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@@ -268,6 +268,7 @@ int pmp_set(unsigned int n, unsigned long prot, unsigned long addr,
return SBI_ENOTSUPP;
/* encode PMP config */
prot &= ~PMP_A;
prot |= (log2len == PMP_SHIFT) ? PMP_A_NA4 : PMP_A_NAPOT;
cfgmask = ~(0xffUL << pmpcfg_shift);
pmpcfg = (csr_read_num(pmpcfg_csr) & cfgmask);