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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>
This commit is contained in:
Peter Maydell 2010-11-19 15:36:47 +00:00 committed by Riku Voipio
parent f3b974cd3b
commit 3a807decfa
1 changed files with 6 additions and 0 deletions
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6
target-arm/helper.c
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@ -203,7 +203,13 @@ void cpu_reset(CPUARMState *env)
cpu_reset_model_id(env, id); cpu_reset_model_id(env, id);
#if defined (CONFIG_USER_ONLY) #if defined (CONFIG_USER_ONLY)
env->uncached_cpsr = ARM_CPU_MODE_USR; env->uncached_cpsr = ARM_CPU_MODE_USR;
/* For user mode we must enable access to coprocessors */
env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30; 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 #else
/* SVC mode with interrupts disabled. */ /* SVC mode with interrupts disabled. */
env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I;