pokeemerald/src/crt0.s

	.include "constants/gba_constants.inc"

	.syntax unified

	.arm

	.align 2, 0
	.global Init
Init:
	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]
	.if MODERN
	mov r0, #255 @ RESET_ALL
	svc #1 << 16
	.endif @ MODERN
	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:
	mov r3, #REG_BASE
	add r3, r3, #OFFSET_REG_IE
	ldr r2, [r3]
	ldrh r1, [r3, #OFFSET_REG_IME - 0x200]
	mrs r0, spsr
	stmfd 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, #REG_SOUNDCNT_X - REG_IE]
	bne . @ spin
IntrMain_FoundIntr:
	strh r0, [r3, #OFFSET_REG_IF - 0x200]
	bic r2, r2, r0
	ldr r0, =gSTWIStatus
	ldr r0, [r0]
	ldrb r0, [r0, 0xA]
	mov r1, 0x8
	lsl r0, r1, 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]
	stmfd sp!, {lr}
	adr lr, IntrMain_RetAddr
	bx r0
IntrMain_RetAddr:
	ldmfd 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`

			`.arm`
Convert GF ROM header to C 2021-11-01 06:42:02 +01:00
make asm compatible with stock gas 2016-09-03 08:11:29 +02:00			`.align 2, 0`
			`.global Init`
Removed more commented out addresses I like to help. 2021-12-22 02:46:59 +01:00			`Init:`
Sort out asm 2020-07-17 00:15:49 +02:00			`mov r0, #PSR_IRQ_MODE`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`msr cpsr_cf, r0`
			`ldr sp, sp_irq`
Sort out asm 2020-07-17 00:15:49 +02:00			`mov r0, #PSR_SYS_MODE`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`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]`
Simplify RAM reset adaptation for modern 2020-11-06 18:29:40 +01:00			`.if MODERN`
			`mov r0, #255 @ RESET_ALL`
swi --> svc 2020-11-06 18:34:57 +01:00			`svc #1 << 16`
Simplify RAM reset adaptation for modern 2020-11-06 18:29:40 +01:00			`.endif @ MODERN`
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`
Removed more commented out addresses I like to help. 2021-12-22 02:46:59 +01:00			`IntrMain:`
Sort out asm 2020-07-17 00:15:49 +02:00			`mov r3, #REG_BASE`
			`add r3, r3, #OFFSET_REG_IE`
			`ldr r2, [r3]`
			`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`
Sort out asm 2020-07-17 00:15:49 +02:00			`stmfd 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`
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`
Sort out asm 2020-07-17 00:15:49 +02:00			`strh r0, [r3, #OFFSET_REG_IME - 0x200]`
			`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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +02:00			`ands r0, r1, #INTR_FLAG_GAMEPAK`
			`strbne r0, [r3, #REG_SOUNDCNT_X - REG_IE]`
begin decompiling main.s 2017-02-04 01:44:06 +01:00			`bne . @ spin`
			`IntrMain_FoundIntr:`
Sort out asm 2020-07-17 00:15:49 +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`
document symbols 2020-01-15 21:46:17 +01:00			`ldr r0, =gSTWIStatus`
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`
Sort out asm 2020-07-17 00:15:49 +02:00			`lsl r0, r1, r0`
			`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`
Sort out asm 2020-07-17 00:15:49 +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`
Sort out asm 2020-07-17 00:15:49 +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]`
Sort out asm 2020-07-17 00:15:49 +02:00			`stmfd 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:`
Sort out asm 2020-07-17 00:15:49 +02:00			`ldmfd sp!, {lr}`
split out files and add build batch file 2015-10-05 15:03:59 +02:00			`mrs r3, cpsr`
Sort out asm 2020-07-17 00:15:49 +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}`
Sort out asm 2020-07-17 00:15:49 +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.`