From cfad709bceb629a4ebeb5d8a3acd1871b9a6436b Mon Sep 17 00:00:00 2001 From: Alexandre Mergnat Date: Mon, 6 Jul 2020 10:45:50 +0200 Subject: [PATCH] target/riscv: Fix pmp NA4 implementation The end address calculation for NA4 mode is wrong because the address used isn't shifted. It doesn't watch 4 bytes but a huge range because the end address calculation is wrong. The solution is to use the shifted address calculated for start address variable. Modifications are tested on Zephyr OS userspace test suite which works for other RISC-V boards (E31 and E34 core). Signed-off-by: Alexandre Mergnat Reviewed-by: Alistair Francis Message-id: 20200706084550.24117-1-amergnat@baylibre.com Message-Id: <20200706084550.24117-1-amergnat@baylibre.com> [ Changes by AF: - Improve the commit title and message ] Signed-off-by: Alistair Francis --- target/riscv/pmp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/target/riscv/pmp.c b/target/riscv/pmp.c index 9418660f1b..2a2b9f5363 100644 --- a/target/riscv/pmp.c +++ b/target/riscv/pmp.c @@ -171,7 +171,7 @@ static void pmp_update_rule(CPURISCVState *env, uint32_t pmp_index) case PMP_AMATCH_NA4: sa = this_addr << 2; /* shift up from [xx:0] to [xx+2:2] */ - ea = (this_addr + 4u) - 1u; + ea = (sa + 4u) - 1u; break; case PMP_AMATCH_NAPOT: