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GBA BIOS: Improve HLE BIOS timing

This commit is contained in:
Vicki Pfau 2020-02-12 23:42:39 -08:00
parent 7ea3728165
commit 8a8b4add91
4 changed files with 60 additions and 34 deletions
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1
CHANGES
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@ -8,6 +8,7 @@ Emulation fixes:
- GBA: Fix multiboot entry point while skipping BIOS
- GBA BIOS: Fix undefined instruction HLE behavior
- GBA BIOS: Implement dummy sound driver calls
- GBA BIOS: Improve HLE BIOS timing
- GBA DMA: Linger last DMA on bus (fixes mgba.io/i/301 and mgba.io/i/1320)
- GBA Memory: Misaligned SRAM writes are ignored
- GBA Memory: Improve gamepak prefetch timing

10
src/gba/bios.c
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@ -431,8 +431,8 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
_RegisterRamReset(gba);
break;
case GBA_SWI_HALT:
GBAHalt(gba);
break;
ARMRaiseSWI(cpu);
return;
case GBA_SWI_STOP:
GBAStop(gba);
break;
@ -442,7 +442,7 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
case GBA_SWI_INTR_WAIT:
// IntrWait
ARMRaiseSWI(cpu);
break;
return;
case GBA_SWI_DIV:
_Div(gba, cpu->gprs[0], cpu->gprs[1]);
break;
@ -472,7 +472,7 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
mLOG(GBA_BIOS, GAME_ERROR, "Misaligned CpuSet destination");
}
ARMRaiseSWI(cpu);
break;
return;
case GBA_SWI_GET_BIOS_CHECKSUM:
cpu->gprs[0] = GBA_BIOS_CHECKSUM;
cpu->gprs[1] = 1;
@ -577,7 +577,7 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
break;
case GBA_SWI_SOUND_DRIVER_GET_JUMP_LIST:
ARMRaiseSWI(cpu);
break;
return;
default:
mLOG(GBA_BIOS, STUB, "Stub software interrupt: %02X", immediate);
}

62
src/gba/hle-bios.c
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@ -3,38 +3,44 @@
#include <mgba/internal/gba/memory.h>
const uint8_t hleBios[SIZE_BIOS] = {
0x06, 0x00, 0x00, 0xea, 0x58, 0x00, 0x00, 0xea, 0x0b, 0x00, 0x00, 0xea,
0x06, 0x00, 0x00, 0xea, 0x66, 0x00, 0x00, 0xea, 0x0b, 0x00, 0x00, 0xea,
0xfe, 0xff, 0xff, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x00, 0x00, 0xa0, 0xe1,
0x4b, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x02, 0x03, 0xa0, 0xe3,
0x03, 0x10, 0xd0, 0xe5, 0xea, 0x00, 0x51, 0xe3, 0x14, 0x01, 0x9f, 0x15,
0x59, 0x00, 0x00, 0xea, 0xfe, 0xff, 0xff, 0xea, 0x02, 0x03, 0xa0, 0xe3,
0x03, 0x10, 0xd0, 0xe5, 0xea, 0x00, 0x51, 0xe3, 0x4c, 0x01, 0x9f, 0x15,
0x10, 0xff, 0x2f, 0xe1, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x29, 0xe1,
0x00, 0x00, 0x5d, 0xe3, 0x01, 0xd3, 0xa0, 0x03, 0x20, 0xd0, 0x4d, 0x02,
0x00, 0x58, 0x2d, 0xe9, 0x02, 0xb0, 0x5e, 0xe5, 0x9c, 0xc0, 0xa0, 0xe3,
0x00, 0x58, 0x2d, 0xe9, 0x02, 0xb0, 0x5e, 0xe5, 0xd4, 0xc0, 0xa0, 0xe3,
0x0b, 0xb1, 0x9c, 0xe7, 0x00, 0x00, 0x5b, 0xe3, 0x00, 0xc0, 0x4f, 0xe1,
0x00, 0x10, 0x2d, 0xe9, 0x80, 0xc0, 0x0c, 0xe2, 0x1f, 0xc0, 0x8c, 0xe3,
0x0c, 0xf0, 0x29, 0xe1, 0x00, 0x40, 0x2d, 0xe9, 0x0f, 0xe0, 0xa0, 0xe1,
0x1b, 0xff, 0x2f, 0x11, 0x00, 0x40, 0xbd, 0xe8, 0x93, 0xf0, 0x29, 0xe3,
0x00, 0x10, 0xbd, 0xe8, 0x0c, 0xf0, 0x69, 0xe1, 0x00, 0x58, 0xbd, 0xe8,
0x0e, 0xf0, 0xb0, 0xe1, 0x00, 0x00, 0x00, 0x00, 0x04, 0x20, 0xa0, 0xe3,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x84, 0x01, 0x00, 0x00, 0x7c, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0xcc, 0x01, 0x00, 0x00,
0x60, 0x02, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00, 0x78, 0x01, 0x00, 0x00,
0xb8, 0x02, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x02, 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, 0x1e, 0xff, 0x2f, 0xe1, 0x01, 0x00, 0xa0, 0xe3,
0x0c, 0xf0, 0x29, 0xe1, 0x00, 0x40, 0x2d, 0xe9, 0x00, 0x00, 0xa0, 0xe1,
0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1,
0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1,
0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1,
0x0f, 0xe0, 0xa0, 0xe1, 0x1b, 0xff, 0x2f, 0x11, 0x00, 0x00, 0xa0, 0xe1,
0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1, 0x00, 0x00, 0xa0, 0xe1,
0x00, 0x40, 0xbd, 0xe8, 0x93, 0xf0, 0x29, 0xe3, 0x00, 0x10, 0xbd, 0xe8,
0x0c, 0xf0, 0x69, 0xe1, 0x00, 0x58, 0xbd, 0xe8, 0x0e, 0xf0, 0xb0, 0xe1,
0x00, 0x00, 0x00, 0x00, 0x04, 0x20, 0xa0, 0xe3, 0xb0, 0x01, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0xb4, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00,
0xcc, 0x01, 0x00, 0x00, 0xc4, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00, 0xb0, 0x01, 0x00, 0x00,
0xb0, 0x01, 0x00, 0x00, 0x14, 0x02, 0x00, 0x00, 0xa8, 0x02, 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, 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,
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, 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, 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,
0x1e, 0xff, 0x2f, 0xe1, 0x00, 0x20, 0xa0, 0xe3, 0x01, 0xc3, 0xa0, 0xe3,
0x01, 0x23, 0xcc, 0xe5, 0x1e, 0xff, 0x2f, 0xe1, 0x01, 0x00, 0xa0, 0xe3,
0x01, 0x10, 0xa0, 0xe3, 0x0c, 0x40, 0x2d, 0xe9, 0x01, 0xc3, 0xa0, 0xe3,
0x00, 0x00, 0x50, 0xe3, 0x00, 0x00, 0xa0, 0xe3, 0x01, 0x20, 0xa0, 0xe3,
0x03, 0x00, 0x00, 0x0a, 0xb8, 0x30, 0x5c, 0xe1, 0x01, 0x30, 0xc3, 0xe1,
@ -66,5 +72,5 @@ const uint8_t hleBios[SIZE_BIOS] = {
0x01, 0x70, 0xa0, 0xe1, 0x01, 0x80, 0xa0, 0xe1, 0x01, 0x90, 0xa0, 0xe1,
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, 0x78, 0x01, 0x00, 0x00
0xf0, 0x07, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1, 0xb0, 0x01, 0x00, 0x00
};

21
src/gba/hle-bios.s
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@ -40,8 +40,22 @@ and r12, #0x80
orr r12, #0x1F
msr cpsr, r12
stmfd sp!, {lr}
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
mov lr, pc
bxne r11
nop
nop
nop
nop
ldmfd sp!, {lr}
msr cpsr, #0x93
ldmfd sp!, {r12}
@ -116,7 +130,6 @@ subs pc, lr, #4
@ Unimplemented
SoftReset:
RegisterRamReset:
Halt:
Stop:
Div:
DivArm:
@ -156,6 +169,12 @@ SoundDriverVsyncOn:
NopCall:
bx lr
Halt:
mov r2, #0
mov r12, #0x04000000
strb r2, [r12, #0x301]
bx lr
VBlankIntrWait:
mov r0, #1
mov r1, #1