riscv/pmp: add all region in NAPOT

This allows using 0 base and size to depict the whole region. Signed-off-by: Yanfeng Liu <[email protected]>
apache · Jul 24, 2024 · 7a865b2 · 7a865b2
1 parent 0e832f4
commit 7a865b2
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/arch/risc-v/src/common/riscv_pmp.c b/arch/risc-v/src/common/riscv_pmp.c
@@ -134,6 +134,13 @@ static bool pmp_check_region_attrs(uintptr_t base, uintptr_t size,
 
     case PMPCFG_A_NAPOT:
       {
+        /* Special range for the whole range */
+
+        if (base == 0 && size == 0)
+          {
+            return true;
+          }
+
         /* For NAPOT, Naturally aligned power-of-two region, >= 8 bytes */
 
         if ((base & 0x07) != 0 || size < 8 || (size & (size - 1)) != 0)