pokeemerald/asm/crt0.s

	.include "constants/gba_constants.inc"

	.syntax unified

	.global Start

	.text

	.arm

Start: @ 8000000
	b Init

	.include "asm/rom_header.inc"

@ 80000C0
	.word 0

	.global GPIOPortData
GPIOPortData: @ 80000C4
	.hword 0

	.global GPIOPortDirection
GPIOPortDirection: @ 80000C6
	.hword 0

	.global GPIOPortReadEnable
GPIOPortReadEnable: @ 80000C8
	.hword 0

	.incbin "baserom.gba", 0xCA, 0x204 - 0xCA

	.arm
	.align 2, 0
	.global Init
Init: @ 8000204
	mov r0, PSR_IRQ_MODE
	msr cpsr_cf, r0
	ldr sp, sp_irq
	mov r0, PSR_SYS_MODE
	msr cpsr_cf, r0
	ldr sp, sp_sys
	ldr r1, =INTR_VECTOR
	adr r0, IntrMain
	str r0, [r1]
	ldr r1, =AgbMain + 1
	mov lr, pc
	bx r1
	b Init

	.align 2, 0
sp_sys: .word IWRAM_END - 0x1c0
sp_irq: .word IWRAM_END - 0x60

	.pool

	.arm
	.align 2, 0
	.global IntrMain
IntrMain: @ 8000248
	mov r3, REG_BASE
	add r3, r3, 0x200
	ldr r2, [r3, OFFSET_REG_IE - 0x200]
	ldrh r1, [r3, OFFSET_REG_IME - 0x200]
	mrs r0, spsr
	stmdb sp!, {r0-r3,lr}
	mov r0, 0
	strh r0, [r3, OFFSET_REG_IME - 0x200]
	and r1, r2, r2, lsr 16
	mov r12, 0
	ands r0, r1, INTR_FLAG_VCOUNT
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	mov r0, 0x1
	strh r0, [r3, OFFSET_REG_IME - 0x200]
	ands r0, r1, INTR_FLAG_SERIAL
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_TIMER3
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_HBLANK
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_VBLANK
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_TIMER0
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_TIMER1
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_TIMER2
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_DMA0
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_DMA1
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_DMA2
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_DMA3
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_KEYPAD
	bne IntrMain_FoundIntr
	add r12, r12, 0x4
	ands r0, r1, INTR_FLAG_GAMEPAK
	strbne r0, [r3, OFFSET_REG_SOUNDCNT_X - 0x200]
	bne . @ spin
IntrMain_FoundIntr:
	strh r0, [r3, OFFSET_REG_IF - 0x200]
	bic r2, r2, r0
	ldr r0, =gUnknown_03007868
	ldr r0, [r0]
	ldrb r0, [r0, 0xA]
	mov r1, 0x8
	mov r0, r1, lsl r0
	orr r0, r0, INTR_FLAG_GAMEPAK
	orr r1, r0, INTR_FLAG_SERIAL | INTR_FLAG_TIMER3 | INTR_FLAG_VCOUNT | INTR_FLAG_HBLANK
	and r1, r1, r2
	strh r1, [r3, OFFSET_REG_IE - 0x200]
	mrs r3, cpsr
	bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK
	orr r3, r3, PSR_SYS_MODE
	msr cpsr_cf, r3
	ldr r1, =gIntrTable
	add r1, r1, r12
	ldr r0, [r1]
	stmdb sp!, {lr}
	adr lr, IntrMain_RetAddr
	bx r0
IntrMain_RetAddr:
	ldmia sp!, {lr}
	mrs r3, cpsr
	bic r3, r3, PSR_I_BIT | PSR_F_BIT | PSR_MODE_MASK
	orr r3, r3, PSR_I_BIT | PSR_IRQ_MODE
	msr cpsr_cf, r3
	ldmia sp!, {r0-r3,lr}
	strh r2, [r3, OFFSET_REG_IE - 0x200]
	strh r1, [r3, OFFSET_REG_IME - 0x200]
	msr spsr_cf, r0
	bx lr

	.pool

	.align 2, 0 @ Don't pad with nop.
.s -> .inc 2016-11-01 16:29:13 +01:00			`.include "constants/gba_constants.inc"`
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00
			`.syntax unified`

			`.global Start`

			`.text`

			`.arm`

			`Start: @ 8000000`
partially comment GameCube multi-boot library 2015-11-27 10:33:50 +01:00			`b Init`

.s -> .inc 2016-11-01 16:29:13 +01:00			`.include "asm/rom_header.inc"`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
convert comments (; -> @) 2016-09-03 04:51:16 +02:00			`@ 80000C0`
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.word 0`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.global GPIOPortData`
convert comments (; -> @) 2016-09-03 04:51:16 +02:00			`GPIOPortData: @ 80000C4`
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.hword 0`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.global GPIOPortDirection`
convert comments (; -> @) 2016-09-03 04:51:16 +02:00			`GPIOPortDirection: @ 80000C6`
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.hword 0`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.global GPIOPortReadEnable`
			`GPIOPortReadEnable: @ 80000C8`
			`.hword 0`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
base_emerald to baserom 2016-09-04 00:07:51 +02:00			`.incbin "baserom.gba", 0xCA, 0x204 - 0xCA`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.arm`
			`.align 2, 0`
			`.global Init`
convert comments (; -> @) 2016-09-03 04:51:16 +02:00			`Init: @ 8000204`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`mov r0, PSR_IRQ_MODE`
			`msr cpsr_cf, r0`
			`ldr sp, sp_irq`
			`mov r0, PSR_SYS_MODE`
			`msr cpsr_cf, r0`
			`ldr sp, sp_sys`
			`ldr r1, =INTR_VECTOR`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`adr r0, IntrMain`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`str r0, [r1]`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`ldr r1, =AgbMain + 1`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`mov lr, pc`
			`bx r1`
			`b Init`

			`.align 2, 0`
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`sp_sys: .word IWRAM_END - 0x1c0`
			`sp_irq: .word IWRAM_END - 0x60`
split out files and add build batch file 2015-10-05 15:03:59 +02:00
			`.pool`

make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.arm`
			`.align 2, 0`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`.global IntrMain`
			`IntrMain: @ 8000248`
add I/O register constants 2015-10-10 19:06:17 +02:00			`mov r3, REG_BASE`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r3, r3, 0x200`
add I/O register constants 2015-10-10 19:06:17 +02:00			`ldr r2, [r3, OFFSET_REG_IE - 0x200]`
			`ldrh r1, [r3, OFFSET_REG_IME - 0x200]`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`mrs r0, spsr`
			`stmdb sp!, {r0-r3,lr}`
			`mov r0, 0`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strh r0, [r3, OFFSET_REG_IME - 0x200]`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`and r1, r2, r2, lsr 16`
			`mov r12, 0`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_VCOUNT`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
			`mov r0, 0x1`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strh r0, [r3, OFFSET_REG_IME - 0x200]`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_SERIAL`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_TIMER3`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_HBLANK`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_VBLANK`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_TIMER0`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_TIMER1`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_TIMER2`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_DMA0`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_DMA1`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_DMA2`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_DMA3`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_KEYPAD`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne IntrMain_FoundIntr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r12, r12, 0x4`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`ands r0, r1, INTR_FLAG_GAMEPAK`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strbne r0, [r3, OFFSET_REG_SOUNDCNT_X - 0x200]`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne . @ spin`
			`IntrMain_FoundIntr:`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strh r0, [r3, OFFSET_REG_IF - 0x200]`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`bic r2, r2, r0`
use ramscrgen 2016-11-01 19:35:16 +01:00			`ldr r0, =gUnknown_03007868`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`ldr r0, [r0]`
			`ldrb r0, [r0, 0xA]`
			`mov r1, 0x8`
			`mov r0, r1, lsl r0`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`orr r0, r0, INTR_FLAG_GAMEPAK`
			`orr r1, r0, INTR_FLAG_SERIAL \| INTR_FLAG_TIMER3 \| INTR_FLAG_VCOUNT \| INTR_FLAG_HBLANK`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`and r1, r1, r2`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strh r1, [r3, OFFSET_REG_IE - 0x200]`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`mrs r3, cpsr`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`bic r3, r3, PSR_I_BIT \| PSR_F_BIT \| PSR_MODE_MASK`
			`orr r3, r3, PSR_SYS_MODE`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`msr cpsr_cf, r3`
finish decompiling main.c (#17) * partially decompile battle_ai.c up to tai60_unk * nonmatching tai60_unk * decompile more of battle_ai.c * formatting * finish porting battle_ai.c * formatting * decompile up to nonmatching VBlankIntr * finish decompiling main.c * formatting 2017-02-15 22:25:21 +01:00			`ldr r1, =gIntrTable`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`add r1, r1, r12`
			`ldr r0, [r1]`
			`stmdb sp!, {lr}`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`adr lr, IntrMain_RetAddr`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`bx r0`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`IntrMain_RetAddr:`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`ldmia sp!, {lr}`
			`mrs r3, cpsr`
use more constants in InterruptMain 2015-10-05 15:53:39 +02:00			`bic r3, r3, PSR_I_BIT \| PSR_F_BIT \| PSR_MODE_MASK`
			`orr r3, r3, PSR_I_BIT \| PSR_IRQ_MODE`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`msr cpsr_cf, r3`
			`ldmia sp!, {r0-r3,lr}`
add I/O register constants 2015-10-10 19:06:17 +02:00			`strh r2, [r3, OFFSET_REG_IE - 0x200]`
			`strh r1, [r3, OFFSET_REG_IME - 0x200]`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`msr spsr_cf, r0`
			`bx lr`

			`.pool`

make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.align 2, 0 @ Don't pad with nop.`