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MCF5208 emulation.

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2924 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
pbrook 2007-06-03 11:13:39 +00:00
parent 62ea5b0bd3
commit 20dcee9483
13 changed files with 833 additions and 296 deletions
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26
target-m68k/helper.c
View file

@ -28,6 +28,7 @@
enum m68k_cpuid {
M68K_CPUID_M5206,
M68K_CPUID_M5208,
M68K_CPUID_CFV4E,
M68K_CPUID_ANY,
};
@ -39,6 +40,7 @@ struct m68k_def_t {
static m68k_def_t m68k_cpu_defs[] = {
{"m5206", M68K_CPUID_M5206},
{"m5208", M68K_CPUID_M5208},
{"cfv4e", M68K_CPUID_CFV4E},
{"any", M68K_CPUID_ANY},
{NULL, 0},
@ -64,12 +66,18 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
case M68K_CPUID_M5206:
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
break;
case M68K_CPUID_M5208:
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
m68k_set_feature(env, M68K_FEATURE_CF_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
break;
case M68K_CPUID_CFV4E:
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
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_EMAC);
m68k_set_feature(env, M68K_FEATURE_USP);
break;
case M68K_CPUID_ANY:
m68k_set_feature(env, M68K_FEATURE_CF_ISA_A);
@ -79,6 +87,7 @@ int cpu_m68k_set_model(CPUM68KState *env, const char * name)
/* 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_USP);
m68k_set_feature(env, M68K_FEATURE_EXT_FULL);
break;
}
@ -215,7 +224,11 @@ void helper_movec(CPUM68KState *env, int reg, uint32_t val)
{
switch (reg) {
case 0x02: /* CACR */
/* Ignored. */
env->cacr = val;
m68k_switch_sp(env);
break;
case 0x04: case 0x05: case 0x06: case 0x07: /* ACR[0-3] */
/* TODO: Implement Access Control Registers. */
break;
case 0x801: /* VBR */
env->vbr = val;
@ -261,6 +274,17 @@ void m68k_set_macsr(CPUM68KState *env, uint32_t val)
env->macsr = val;
}
void m68k_switch_sp(CPUM68KState *env)
{
int new_sp;
env->sp[env->current_sp] = env->aregs[7];
new_sp = (env->sr & SR_S && env->cacr & M68K_CACR_EUSP)
? M68K_SSP : M68K_USP;
env->aregs[7] = env->sp[new_sp];
env->current_sp = new_sp;
}
/* MMU */
/* TODO: This will need fixing once the MMU is implemented. */