diff options
| author | Laurent Vivier <laurent@vivier.eu> | 2019-12-20 18:24:15 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2020-01-07 14:21:18 +0100 |
| commit | 18b6102e51bb317d25ee61b49b7b56702b79560c (patch) | |
| tree | 75d457c50c6af36a4be9c61680cb9e076b01fbb3 /target/m68k/helper.c | |
| parent | e24e58e8acdee80ecd5ee8279d56df53b0232a26 (diff) | |
target/m68k: only change valid bits in CACR
This is used by netBSD (and MacOS ROM) to detect the MMU type
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
Message-Id: <20191220172415.35838-1-laurent@vivier.eu>
[lv: add a comment before m680x0_cpu_common()]
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'target/m68k/helper.c')
| -rw-r--r-- | target/m68k/helper.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/target/m68k/helper.c b/target/m68k/helper.c index ae766a6cb0..baf7729af0 100644 --- a/target/m68k/helper.c +++ b/target/m68k/helper.c @@ -203,9 +203,17 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) case M68K_CR_VBR: env->vbr = val; return; - /* MC680[234]0 */ + /* MC680[2346]0 */ case M68K_CR_CACR: - env->cacr = val; + if (m68k_feature(env, M68K_FEATURE_M68020)) { + env->cacr = val & 0x0000000f; + } else if (m68k_feature(env, M68K_FEATURE_M68030)) { + env->cacr = val & 0x00003f1f; + } else if (m68k_feature(env, M68K_FEATURE_M68040)) { + env->cacr = val & 0x80008000; + } else if (m68k_feature(env, M68K_FEATURE_M68060)) { + env->cacr = val & 0xf8e0e000; + } m68k_switch_sp(env); return; /* MC680[34]0 */ |