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ColdFire EMAC support.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2895 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-05-29 14:57:59 +00:00
parent 2b8bdefc3a
commit acf930aaa3
6 changed files with 763 additions and 3 deletions
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38
target-m68k/helper.c
View file

@ -69,7 +69,6 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_C);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_MAC);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
break;
case M68K_CPUID_ANY:
@ -77,7 +76,8 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
m68k_set_feature(env, M68K_FEATURE_CF_ISA_B);
m68k_set_feature(env, M68K_FEATURE_CF_ISA_C);
m68k_set_feature(env, M68K_FEATURE_CF_FPU);
m68k_set_feature(env, M68K_FEATURE_CF_MAC);
/* MAC and EMAC are mututally exclusive, so pick EMAC.
It's mostly backwards compatible. */
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
break;
@ -227,6 +227,40 @@ void helper_movec(CPUM68KState *env, int reg, uint32_t val)
}
}
void m68k_set_macsr(CPUM68KState *env, uint32_t val)
{
uint32_t acc;
int8_t exthigh;
uint8_t extlow;
uint64_t regval;
int i;
if ((env->macsr ^ val) & (MACSR_FI | MACSR_SU)) {
for (i = 0; i < 4; i++) {
regval = env->macc[i];
exthigh = regval >> 40;
if (env->macsr & MACSR_FI) {
acc = regval >> 8;
extlow = regval;
} else {
acc = regval;
extlow = regval >> 32;
}
if (env->macsr & MACSR_FI) {
regval = (((uint64_t)acc) << 8) | extlow;
regval |= ((int64_t)exthigh) << 40;
} else if (env->macsr & MACSR_SU) {
regval = acc | (((int64_t)extlow) << 32);
regval |= ((int64_t)exthigh) << 40;
} else {
regval = acc | (((uint64_t)extlow) << 32);
regval |= ((uint64_t)(uint8_t)exthigh) << 40;
}
env->macc[i] = regval;
}
}
env->macsr = val;
}
/* MMU */
/* TODO: This will need fixing once the MMU is implemented. */