From: Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
To: qemu-devel@nongnu.org, Laurent Vivier <laurent@vivier.eu>,
Lucien Murray-Pitts <lucienmp.qemu@gmail.com>
Subject: [Qemu-devel] [PATCH 3/6] Improved comments on m68k_move_to/from helpers
Date: Sun, 16 Jun 2019 23:22:57 +0900 [thread overview]
Message-ID: <20190616142257.GA71205@localhost.localdomain> (raw)
Added 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>
---
target/m68k/helper.c | 41 +++++++++++++++++++++++++++++++----------
1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/target/m68k/helper.c b/target/m68k/helper.c
index b0bb579403..5483ce9837 100644
--- a/target/m68k/helper.c
+++ b/target/m68k/helper.c
@@ -197,40 +197,47 @@ void HELPER(m68k_movec_to)(CPUM68KState *env, uint32_t reg, uint32_t val)
M68kCPU *cpu = m68k_env_get_cpu(env);
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;
- /* MC680[234]0 */
+ /* MC680[2346]0 */
case M68K_CR_CACR:
env->cacr = val;
m68k_switch_sp(env);
return;
- /* MC680[34]0 */
+ /* MC680[46]0 */
case M68K_CR_TC:
env->mmu.tcr = val;
return;
+ /* MC680[4]0 */
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;
@@ -238,12 +245,15 @@ 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;
@@ -257,39 +267,50 @@ uint32_t HELPER(m68k_movec_from)(CPUM68KState *env, uint32_t reg)
M68kCPU *cpu = m68k_env_get_cpu(env);
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;
+ /* MC680[4]0 */
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(CPU(cpu), "Unimplemented control register read 0x%x\n",
--
2.21.0
next reply other threads:[~2019-06-16 14:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-16 14:22 Lucien Murray-Pitts [this message]
2019-07-02 9:44 ` [Qemu-devel] [PATCH 3/6] Improved comments on m68k_move_to/from helpers Laurent Vivier
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