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GBA: Fix booting multiboot ROMs with no JOY entrypoint

This commit is contained in:
Vicki Pfau 2022-05-24 19:23:39 -07:00
parent 86b032dac7
commit c6d7c40dfc
3 changed files with 36 additions and 15 deletions
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1
CHANGES
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@ -25,6 +25,7 @@ Emulation fixes:
- GB Video: Draw SGB border pieces that overlap GB graphics (fixes mgba.io/i/1339)
- GBA: Improve timing when not booting from BIOS
- GBA: Fix expected entry point for multiboot ELFs (fixes mgba.io/i/2450)
- GBA: Fix booting multiboot ROMs with no JOY entrypoint
- GBA BIOS: Work around IRQ handling hiccup in Mario & Luigi (fixes mgba.io/i/1059)
- GBA BIOS: Initial HLE timing estimation of UnLz77 functions (fixes mgba.io/i/2141)
- GBA DMA: Fix DMA source direction bits being cleared (fixes mgba.io/i/2410)

17
src/gba/hle-bios.c
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@ -3,11 +3,11 @@
#include <mgba/internal/gba/memory.h>
const uint8_t hleBios[SIZE_BIOS] = {
0x06, 0x00, 0x00, 0xea, 0x66, 0x00, 0x00, 0xea, 0x0c, 0x00, 0x00, 0xea,
0xd3, 0x00, 0x00, 0xea, 0x66, 0x00, 0x00, 0xea, 0x0c, 0x00, 0x00, 0xea,
0xfe, 0xff, 0xff, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x00, 0x00, 0xa0, 0xe1,
0x59, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x58, 0x01, 0x9f, 0xe5,
0x00, 0x10, 0x90, 0xe5, 0x00, 0x00, 0x51, 0xe3, 0x02, 0x03, 0xa0, 0x03,
0x10, 0xff, 0x2f, 0xe1, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x29, 0xe1,
0x59, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5d, 0xe3, 0x01, 0xd3, 0xa0, 0x03,
0x20, 0xd0, 0x4d, 0x02, 0x00, 0x58, 0x2d, 0xe9, 0x02, 0xc0, 0x5e, 0xe5,
0xd4, 0xb0, 0xa0, 0xe3, 0x0c, 0xc1, 0x9b, 0xe7, 0xd2, 0xbf, 0xa0, 0xe3,
@ -35,7 +35,7 @@ const uint8_t hleBios[SIZE_BIOS] = {
0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00,
0xc0, 0x00, 0x00, 0x02, 0x0f, 0x50, 0x2d, 0xe9, 0x01, 0x03, 0xa0, 0xe3,
0x00, 0x00, 0x00, 0x00, 0x0f, 0x50, 0x2d, 0xe9, 0x01, 0x03, 0xa0, 0xe3,
0x00, 0xe0, 0x8f, 0xe2, 0x04, 0xf0, 0x10, 0xe5, 0x0f, 0x50, 0xbd, 0xe8,
0x04, 0xf0, 0x5e, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x02, 0xc0, 0x5e, 0xe5,
0x04, 0xf0, 0x5e, 0xe2, 0x00, 0x00, 0x00, 0x00, 0x04, 0xe0, 0xa0, 0x03,
@ -73,5 +73,10 @@ const uint8_t hleBios[SIZE_BIOS] = {
0x01, 0xa0, 0xa0, 0xe1, 0xfa, 0x07, 0xa0, 0xe8, 0xfa, 0x07, 0xa0, 0xe8,
0xfa, 0x07, 0xa0, 0xe8, 0xfa, 0x07, 0xa0, 0xe8, 0x00, 0x10, 0xa0, 0xe3,
0xf0, 0x07, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1, 0xb0, 0x01, 0x00, 0x00,
0x04, 0xb0, 0x5b, 0xe2, 0xfd, 0xff, 0xff, 0x8a, 0x1e, 0xff, 0x2f, 0xe1
0x04, 0xb0, 0x5b, 0xe2, 0xfd, 0xff, 0xff, 0x8a, 0x1e, 0xff, 0x2f, 0xe1,
0xc2, 0x03, 0xa0, 0xe3, 0x03, 0x10, 0x50, 0xe4, 0x00, 0x00, 0x51, 0xe3,
0x00, 0x10, 0xa0, 0x13, 0x10, 0xff, 0x2f, 0x11, 0x1c, 0x00, 0x9f, 0xe5,
0x00, 0x10, 0x90, 0xe5, 0x00, 0x00, 0x51, 0xe3, 0x00, 0x10, 0xa0, 0xe3,
0x10, 0xff, 0x2f, 0x11, 0xc0, 0x00, 0x40, 0xe2, 0x10, 0xff, 0x2f, 0xe1,
0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x29, 0xe1, 0xc0, 0x00, 0x00, 0x02
};

33
src/gba/hle-bios.s
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@ -16,16 +16,14 @@ nop
b irqBase
b fiqBase
resetBase:
ldr r0, =0x20000C0
ldr r1, [r0]
cmp r1, #0
moveq r0, #0x8000000
bx r0
.word 0
.word 0xE129F000
.word 0 @ Padding for back-compat
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
.word 0
swiBase:
cmp sp, #0
@ -113,6 +111,7 @@ swiTable:
.word SoundDriverGetJumpList @ 0x2A
.ltorg
.word 0 @ Padding for back-compat
irqBase:
stmfd sp!, {r0-r3, r12, lr}
@ -313,3 +312,19 @@ StallCall:
subs r11, #4
bhi StallCall
bx lr
resetBase:
mov r0, #0x8000003
ldrb r1, [r0], #-3
cmp r1, #0
movne r1, #0
bxne r0
ldr r0, =0x20000C0
ldr r1, [r0]
cmp r1, #0
mov r1, #0
bxne r0
sub r0, #0xC0
bx r0
.word 0
.word 0xE129F000