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[Qemu-devel] [PATCH 01/13] PPC: Allow Rc bit to be set on mtspr
From: |
Mark Cave-Ayland |
Subject: |
[Qemu-devel] [PATCH 01/13] PPC: Allow Rc bit to be set on mtspr |
Date: |
Fri, 23 Oct 2015 14:56:26 +0100 |
From: Alexander Graf <address@hidden>
According to the ISA setting the Rc bit on mtspr is undefined behavior.
Real 750 hardware simply ignores the bit and doesn't touch cr0 though.
Unfortunately, Mac OS 9 relies on this fact and executes a few mtspr
instructions (to set XER for example) with Rc set.
So let's handle the bit the same way hardware does and ignore it.
Signed-off-by: Alexander Graf <address@hidden>
Signed-off-by: Mark Cave-Ayland <address@hidden>
---
target-ppc/translate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index c2bc1a7..d1f0f13 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -9884,7 +9884,7 @@ GEN_HANDLER(mtcrf, 0x1F, 0x10, 0x04, 0x00000801,
PPC_MISC),
GEN_HANDLER(mtmsrd, 0x1F, 0x12, 0x05, 0x001EF801, PPC_64B),
#endif
GEN_HANDLER(mtmsr, 0x1F, 0x12, 0x04, 0x001FF801, PPC_MISC),
-GEN_HANDLER(mtspr, 0x1F, 0x13, 0x0E, 0x00000001, PPC_MISC),
+GEN_HANDLER(mtspr, 0x1F, 0x13, 0x0E, 0x00000000, PPC_MISC),
GEN_HANDLER(dcbf, 0x1F, 0x16, 0x02, 0x03C00001, PPC_CACHE),
GEN_HANDLER(dcbi, 0x1F, 0x16, 0x0E, 0x03E00001, PPC_CACHE),
GEN_HANDLER(dcbst, 0x1F, 0x16, 0x01, 0x03E00001, PPC_CACHE),
--
1.7.10.4
- [Qemu-devel] [PATCH 00/13] Mac OS 9 compatibility improvements (upstream rework), Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 07/13] cuda.c: implement dummy IIC access commands, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 01/13] PPC: Allow Rc bit to be set on mtspr,
Mark Cave-Ayland <=
- [Qemu-devel] [PATCH 05/13] cuda.c: fix CUDA_PACKET response packet format, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 02/13] PPC: Fix lsxw bounds checks, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 09/13] cuda.c: add defines for CUDA registers, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 03/13] PPC: mac99: Always add USB controller, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 06/13] cuda.c: implement simple CUDA_GET_6805_ADDR command, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 04/13] cuda.c: fix CUDA ADB error packet format, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 08/13] cuda.c: fix CUDA SR interrupt clearing, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 11/13] cuda.c: rename get_counter() state variable from s to ti for consistency, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 10/13] cuda.c: refactor get_tb() so that the time can be passed in, Mark Cave-Ayland, 2015/10/23
- [Qemu-devel] [PATCH 13/13] cuda.c: add delay to setting of SR_INT bit, Mark Cave-Ayland, 2015/10/23