diff options
| author | Lucien Murray-Pitts <lucienmp.qemu@gmail.com> | 2021-02-01 01:01:52 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2021-02-11 21:10:01 +0100 |
| commit | 60d8e96453d090f71027f95e47e5ddbe17f670e3 (patch) | |
| tree | 2a871bd0447944b17fd628836bf1ea05897b9d5a /target/m68k | |
| parent | 4ecce5fb52314c02e680924cf8f5050b207e19d4 (diff) | |
m68k: improve comments on m68k_move_to/from helpers
Add more detailed comments to each case of m68k_move_to/from helpers to list
the supported CPUs for that CR as they were wrong in some cases, and
missing some cpu classes in other cases.
Signed-off-by: Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <a8bd70b66e3dbdb7d2ab7a852af71cdbf341d50c.1612137712.git.balaton@eik.bme.hu>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'target/m68k')
| -rw-r--r-- | target/m68k/helper.c | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/target/m68k/helper.c b/target/m68k/helper.c index 3ff5765795..9e81ee53ad 100644 --- a/target/m68k/helper.c +++ b/target/m68k/helper.c @@ -187,13 +187,15 @@ void HELPER(cf_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) { switch (reg) { - /* MC680[1234]0 */ + /* MC680[12346]0 */ case M68K_CR_SFC: env->sfc = val & 7; return; + /* MC680[12346]0 */ case M68K_CR_DFC: env->dfc = val & 7; return; + /* MC680[12346]0 */ case M68K_CR_VBR: env->vbr = val; return; @@ -210,25 +212,30 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) } m68k_switch_sp(env); return; - /* MC680[34]0 */ + /* MC680[46]0 */ case M68K_CR_TC: env->mmu.tcr = val; return; + /* MC68040 */ case M68K_CR_MMUSR: env->mmu.mmusr = val; return; + /* MC680[46]0 */ case M68K_CR_SRP: env->mmu.srp = val; return; case M68K_CR_URP: env->mmu.urp = val; return; + /* MC680[46]0 */ case M68K_CR_USP: env->sp[M68K_USP] = val; return; + /* MC680[234]0 */ case M68K_CR_MSP: env->sp[M68K_SSP] = val; return; + /* MC680[234]0 */ case M68K_CR_ISP: env->sp[M68K_ISP] = val; return; @@ -236,12 +243,15 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) case M68K_CR_ITT0: env->mmu.ttr[M68K_ITTR0] = val; return; + /* MC68040/MC68LC040 */ case M68K_CR_ITT1: env->mmu.ttr[M68K_ITTR1] = val; return; + /* MC68040/MC68LC040 */ case M68K_CR_DTT0: env->mmu.ttr[M68K_DTTR0] = val; return; + /* MC68040/MC68LC040 */ case M68K_CR_DTT1: env->mmu.ttr[M68K_DTTR1] = val; return; @@ -254,39 +264,50 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val) uint32_t HELPER(m68k_movec_from)(CPUM68KState *env, uint32_t reg) { switch (reg) { - /* MC680[1234]0 */ + /* MC680[12346]0 */ case M68K_CR_SFC: return env->sfc; + /* MC680[12346]0 */ case M68K_CR_DFC: return env->dfc; + /* MC680[12346]0 */ case M68K_CR_VBR: return env->vbr; - /* MC680[234]0 */ + /* MC680[2346]0 */ case M68K_CR_CACR: return env->cacr; - /* MC680[34]0 */ + /* MC680[46]0 */ case M68K_CR_TC: return env->mmu.tcr; + /* MC68040 */ case M68K_CR_MMUSR: return env->mmu.mmusr; + /* MC680[46]0 */ case M68K_CR_SRP: return env->mmu.srp; + /* MC680[46]0 */ case M68K_CR_USP: return env->sp[M68K_USP]; + /* MC680[234]0 */ case M68K_CR_MSP: return env->sp[M68K_SSP]; + /* MC680[234]0 */ case M68K_CR_ISP: return env->sp[M68K_ISP]; /* MC68040/MC68LC040 */ case M68K_CR_URP: return env->mmu.urp; - case M68K_CR_ITT0: + /* MC68040/MC68LC040 */ + case M68K_CR_ITT0: /* MC68EC040 only: M68K_CR_IACR0 */ return env->mmu.ttr[M68K_ITTR0]; - case M68K_CR_ITT1: + /* MC68040/MC68LC040 */ + case M68K_CR_ITT1: /* MC68EC040 only: M68K_CR_IACR1 */ return env->mmu.ttr[M68K_ITTR1]; - case M68K_CR_DTT0: + /* MC68040/MC68LC040 */ + case M68K_CR_DTT0: /* MC68EC040 only: M68K_CR_DACR0 */ return env->mmu.ttr[M68K_DTTR0]; - case M68K_CR_DTT1: + /* MC68040/MC68LC040 */ + case M68K_CR_DTT1: /* MC68EC040 only: M68K_CR_DACR1 */ return env->mmu.ttr[M68K_DTTR1]; } cpu_abort(env_cpu(env), "Unimplemented control register read 0x%x\n", |