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| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2011-05-29 02:58:41 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2011-06-22 15:02:42 +0000 |
| commit | 82845826e89fdc02f6f000fca5d5019ec9be4ab3 (patch) | |
| tree | 6331e9c498b6a2d1d4ed35c16345bca76a626a5a /target-arm/helper.c | |
| parent | 74594c9d813e4d14e9c16cc71824d8905bedc19d (diff) | |
| download | qemu-82845826e89fdc02f6f000fca5d5019ec9be4ab3.tar.gz qemu-82845826e89fdc02f6f000fca5d5019ec9be4ab3.tar.bz2 qemu-82845826e89fdc02f6f000fca5d5019ec9be4ab3.zip | |
target-arm: Fix BASEPRI, BASEPRI_MAX, and FAULTMASK access
Correct the decode of the register numbers for BASEPRI, BASEPRI_MAX
and FAULTMASK, according to "ARMv7-M Architecture Reference Manual"
issue D section "B5.2.3 MRS" and "B5.2.3 MSR".
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm/helper.c')
| -rw-r--r-- | target-arm/helper.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 9785cc5212..a0f2314799 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2128,11 +2128,11 @@ uint32_t HELPER(v7m_mrs)(CPUState *env, uint32_t reg) return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp; case 16: /* PRIMASK */ return (env->uncached_cpsr & CPSR_I) != 0; - case 17: /* FAULTMASK */ - return (env->uncached_cpsr & CPSR_F) != 0; - case 18: /* BASEPRI */ - case 19: /* BASEPRI_MAX */ + case 17: /* BASEPRI */ + case 18: /* BASEPRI_MAX */ return env->v7m.basepri; + case 19: /* FAULTMASK */ + return (env->uncached_cpsr & CPSR_F) != 0; case 20: /* CONTROL */ return env->v7m.control; default: @@ -2184,20 +2184,20 @@ void HELPER(v7m_msr)(CPUState *env, uint32_t reg, uint32_t val) else env->uncached_cpsr &= ~CPSR_I; break; - case 17: /* FAULTMASK */ - if (val & 1) - env->uncached_cpsr |= CPSR_F; - else - env->uncached_cpsr &= ~CPSR_F; - break; - case 18: /* BASEPRI */ + case 17: /* BASEPRI */ env->v7m.basepri = val & 0xff; break; - case 19: /* BASEPRI_MAX */ + case 18: /* BASEPRI_MAX */ val &= 0xff; if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0)) env->v7m.basepri = val; break; + case 19: /* FAULTMASK */ + if (val & 1) + env->uncached_cpsr |= CPSR_F; + else + env->uncached_cpsr &= ~CPSR_F; + break; case 20: /* CONTROL */ env->v7m.control = val & 3; switch_v7m_sp(env, (val & 2) != 0); |