diff options
| -rw-r--r-- | target/mips/tcg/system/cp0_helper.c | 23 |
1 files changed, 8 insertions, 15 deletions
diff --git a/target/mips/tcg/system/cp0_helper.c b/target/mips/tcg/system/cp0_helper.c index 8c2114c58a..5db8166d45 100644 --- a/target/mips/tcg/system/cp0_helper.c +++ b/target/mips/tcg/system/cp0_helper.c @@ -866,24 +866,17 @@ void helper_mtc0_memorymapid(CPUMIPSState *env, target_ulong arg1) void update_pagemask(CPUMIPSState *env, target_ulong arg1, int32_t *pagemask) { - uint32_t mask; - int maskbits; - /* Don't care MASKX as we don't support 1KB page */ - mask = extract32((uint32_t)arg1, CP0PM_MASK, 16); - maskbits = cto32(mask); + uint32_t mask = extract32((uint32_t)arg1, CP0PM_MASK, 16); + int maskbits = cto32(mask); - /* Ensure no more set bit after first zero */ - if ((mask >> maskbits) != 0) { - goto invalid; + /* Ensure no more set bit after first zero, and maskbits even. */ + if ((mask >> maskbits) == 0 && maskbits % 2 == 0) { + env->CP0_PageMask = mask << CP0PM_MASK; + } else { + /* When invalid, set to default target page size. */ + env->CP0_PageMask = 0; } - env->CP0_PageMask = mask << CP0PM_MASK; - - return; - -invalid: - /* When invalid, set to default target page size. */ - env->CP0_PageMask = 0; } void helper_mtc0_pagemask(CPUMIPSState *env, target_ulong arg1) |