mirror of
https://github.com/dborth/snes9xgx.git
synced 2024-12-29 12:41:49 +01:00
72 lines
1.6 KiB
ArmAsm
72 lines
1.6 KiB
ArmAsm
|
/* Copyright 2013 tueidj All Rights Reserved
|
||
|
|
* This code may not be used in any project
|
||
|
|
* without explicit permission from the author.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <ppc-asm.h>
|
||
|
|
#include "asm.h"
|
||
|
|
|
||
|
|
.extern vm_dsi_handler
|
||
|
|
.extern default_exceptionhandler
|
||
|
|
|
||
|
|
FUNC_START(dsi_handler)
|
||
|
|
stwu sp,-EXCEPTION_FRAME_END(sp)
|
||
|
|
stw r6,GPR6_OFFSET(sp)
|
||
|
|
stw r7,GPR7_OFFSET(sp)
|
||
|
|
stw r8,GPR8_OFFSET(sp)
|
||
|
|
stw r9,GPR9_OFFSET(sp)
|
||
|
|
stw r10,GPR10_OFFSET(sp)
|
||
|
|
stw r11,GPR11_OFFSET(sp)
|
||
|
|
stw r12,GPR12_OFFSET(sp)
|
||
|
|
mfdsisr r4
|
||
|
|
mfmsr r3
|
||
|
|
ori r3,r3,MSR_RI
|
||
|
|
mtmsr r3
|
||
|
|
|
||
|
|
addi r3,sp,8
|
||
|
|
bl vm_dsi_handler
|
||
|
|
|
||
|
|
# check if it was handled correctly
|
||
|
|
cmplwi r3,0
|
||
|
|
|
||
|
|
lwz r6,GPR6_OFFSET(sp)
|
||
|
|
lwz r7,GPR7_OFFSET(sp)
|
||
|
|
lwz r8,GPR8_OFFSET(sp)
|
||
|
|
lwz r9,GPR9_OFFSET(sp)
|
||
|
|
lwz r10,GPR10_OFFSET(sp)
|
||
|
|
lwz r11,GPR11_OFFSET(sp)
|
||
|
|
lwz r12,GPR12_OFFSET(sp)
|
||
|
|
|
||
|
|
# clear MSR_RI
|
||
|
|
mfmsr r3
|
||
|
|
rlwinm r3,r3,0,31,29
|
||
|
|
mtmsr r3
|
||
|
|
|
||
|
|
bne 1f
|
||
|
|
|
||
|
|
# jump to libogc's default handler
|
||
|
|
addi sp,sp,EXCEPTION_FRAME_END
|
||
|
|
b default_exceptionhandler
|
||
|
|
|
||
|
|
1:
|
||
|
|
lwz r3,CR_OFFSET(sp)
|
||
|
|
lwz r4,LR_OFFSET(sp)
|
||
|
|
lwz r5,CTR_OFFSET(sp)
|
||
|
|
lwz r0,XER_OFFSET(sp)
|
||
|
|
mtcr r3
|
||
|
|
mtlr r4
|
||
|
|
mtctr r5
|
||
|
|
mtxer r0
|
||
|
|
lwz r0,GPR0_OFFSET(sp)
|
||
|
|
lwz r5,GPR5_OFFSET(sp)
|
||
|
|
|
||
|
|
lwz r3,SRR0_OFFSET(sp)
|
||
|
|
lwz r4,SRR1_OFFSET(sp)
|
||
|
|
mtsrr0 r3
|
||
|
|
mtsrr1 r4
|
||
|
|
lwz r3,GPR3_OFFSET(sp)
|
||
|
|
lwz r4,GPR4_OFFSET(sp)
|
||
|
|
lwz sp,GPR1_OFFSET(sp)
|
||
|
|
rfi
|
||
|
|
FUNC_END(dsi_handler)
|