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

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>
Xiang W 2 jaren geleden
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1 gewijzigde bestanden met toevoegingen van 1 en 0 verwijderingen
  1. 1 0
      lib/sbi/riscv_asm.c

+ 1 - 0
lib/sbi/riscv_asm.c

@@ -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);