From 8be6971b73da45e8ee9f8decd136ff054b5230ac Mon Sep 17 00:00:00 2001 From: Alistair Francis Date: Tue, 26 May 2020 16:06:02 -0700 Subject: [PATCH] target/riscv: Disable the MMU correctly Previously if we didn't enable the MMU it would be enabled in the realize() function anyway. Let's ensure that if we don't want the MMU we disable it. We also don't need to enable the MMU as it will be enabled in realize() by default. Signed-off-by: Alistair Francis Reviewed-by: Bin Meng --- target/riscv/cpu.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 55a180edf9..e1c9a2de58 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -142,7 +142,6 @@ static void rv32gcsu_priv1_10_0_cpu_init(Object *obj) set_misa(env, RV32 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); set_priv_version(env, PRIV_VERSION_1_10_0); set_resetvec(env, DEFAULT_RSTVEC); - set_feature(env, RISCV_FEATURE_MMU); set_feature(env, RISCV_FEATURE_PMP); } @@ -153,6 +152,7 @@ static void rv32imacu_nommu_cpu_init(Object *obj) set_priv_version(env, PRIV_VERSION_1_10_0); set_resetvec(env, DEFAULT_RSTVEC); set_feature(env, RISCV_FEATURE_PMP); + qdev_prop_set_bit(DEVICE(obj), "mmu", false); } static void rv32imafcu_nommu_cpu_init(Object *obj) @@ -162,6 +162,7 @@ static void rv32imafcu_nommu_cpu_init(Object *obj) set_priv_version(env, PRIV_VERSION_1_10_0); set_resetvec(env, DEFAULT_RSTVEC); set_feature(env, RISCV_FEATURE_PMP); + qdev_prop_set_bit(DEVICE(obj), "mmu", false); } #elif defined(TARGET_RISCV64) @@ -180,7 +181,6 @@ static void rv64gcsu_priv1_10_0_cpu_init(Object *obj) set_misa(env, RV64 | RVI | RVM | RVA | RVF | RVD | RVC | RVS | RVU); set_priv_version(env, PRIV_VERSION_1_10_0); set_resetvec(env, DEFAULT_RSTVEC); - set_feature(env, RISCV_FEATURE_MMU); set_feature(env, RISCV_FEATURE_PMP); } @@ -191,6 +191,7 @@ static void rv64imacu_nommu_cpu_init(Object *obj) set_priv_version(env, PRIV_VERSION_1_10_0); set_resetvec(env, DEFAULT_RSTVEC); set_feature(env, RISCV_FEATURE_PMP); + qdev_prop_set_bit(DEVICE(obj), "mmu", false); } #endif -- 2.11.0