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| author | Peter Maydell <peter.maydell@linaro.org> | 2010-11-19 15:36:47 +0000 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@nokia.com> | 2010-12-03 15:09:39 +0200 |
| commit | 3a807decfa5245d3eb50c9301e73fc5da4a484e1 (patch) | |
| tree | df7829aa1805c342f32b694c463091d74788c62e | |
| parent | f3b974cd3bb624cc7a3004db902b59d599ff016a (diff) | |
ARM: enable XScale/iWMMXT in linux-user mode
In linux-user mode, the XScale/iWMMXT coprocessors must be enabled
at reset so that we can run code that uses these instructions.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
| -rw-r--r-- | target-arm/helper.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target-arm/helper.c b/target-arm/helper.c index 996d40d185..94aef393e2 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -203,7 +203,13 @@ void cpu_reset(CPUARMState *env) cpu_reset_model_id(env, id); #if defined (CONFIG_USER_ONLY) env->uncached_cpsr = ARM_CPU_MODE_USR; + /* For user mode we must enable access to coprocessors */ env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; + if (arm_feature(env, ARM_FEATURE_IWMMXT)) { + env->cp15.c15_cpar = 3; + } else if (arm_feature(env, ARM_FEATURE_XSCALE)) { + env->cp15.c15_cpar = 1; + } #else /* SVC mode with interrupts disabled. */ env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |