split flash.s

asm/flash.s

@@ -0,0 +1,218 @@
+	.include "constants/gba_constants.inc"
+	.include "asm/macros.inc"
+
+	.syntax unified
+
+	.text
+
+	thumb_func_start sub_800CF0C
+sub_800CF0C:
+	push {lr}
+	bl IdentifyFlash
+	lsls r0, 16
+	cmp r0, 0
+	bne _0800CF32
+	movs r0, 0x3
+	bl sub_800B6E8
+	adds r1, r0, 0
+	movs r0, 0x2
+	bl SetFlashTimerIntr
+	lsls r0, 16
+	cmp r0, 0
+	bne _0800CF32
+	ldr r1, _0800CF38
+	movs r0, 0x1
+	strb r0, [r1]
+_0800CF32:
+	pop {r0}
+	bx r0
+	.align 2, 0
+_0800CF38: .4byte gUnknown_203B0B4
+	thumb_func_end sub_800CF0C
+
+	thumb_func_start sub_800CF3C
+sub_800CF3C:
+	push {lr}
+	ldr r0, _0800CF54
+	ldrb r0, [r0]
+	cmp r0, 0
+	beq _0800CF4E
+	ldr r0, _0800CF58
+	ldr r0, [r0]
+	bl _call_via_r0
+_0800CF4E:
+	pop {r0}
+	bx r0
+	.align 2, 0
+_0800CF54: .4byte gUnknown_203B0B4
+_0800CF58: .4byte EraseFlashChip
+	thumb_func_end sub_800CF3C
+
+	thumb_func_start sub_800CF5C
+sub_800CF5C:
+	push {r4-r7,lr}
+	mov r7, r8
+	push {r7}
+	adds r6, r0, 0
+	adds r5, r2, 0
+	ldr r0, _0800CFAC
+	ldrb r0, [r0]
+	cmp r0, 0
+	beq _0800CFB4
+	adds r4, r1, 0
+	ldr r0, _0800CFB0
+	cmp r5, r0
+	ble _0800CF94
+	movs r7, 0x80
+	lsls r7, 5
+	mov r8, r0
+_0800CF7C:
+	lsls r0, r6, 16
+	lsrs r0, 16
+	movs r1, 0
+	adds r2, r4, 0
+	adds r3, r7, 0
+	bl ReadFlash
+	adds r6, 0x1
+	adds r4, r7
+	subs r5, r7
+	cmp r5, r8
+	bgt _0800CF7C
+_0800CF94:
+	cmp r5, 0
+	ble _0800CFA6
+	lsls r0, r6, 16
+	lsrs r0, 16
+	movs r1, 0
+	adds r2, r4, 0
+	adds r3, r5, 0
+	bl ReadFlash
+_0800CFA6:
+	movs r0, 0
+	b _0800CFB6
+	.align 2, 0
+_0800CFAC: .4byte gUnknown_203B0B4
+_0800CFB0: .4byte 0x00000fff
+_0800CFB4:
+	movs r0, 0x3
+_0800CFB6:
+	pop {r3}
+	mov r8, r3
+	pop {r4-r7}
+	pop {r1}
+	bx r1
+	thumb_func_end sub_800CF5C
+
+	thumb_func_start sub_800CFC0
+sub_800CFC0:
+	push {r4-r6,lr}
+	ldr r4, _0800CFD8
+	add sp, r4
+	adds r6, r0, 0
+	adds r5, r2, 0
+	ldr r0, _0800CFDC
+	ldrb r0, [r0]
+	cmp r0, 0
+	beq _0800D03C
+	movs r2, 0x1
+	adds r4, r1, 0
+	b _0800CFEC
+	.align 2, 0
+_0800CFD8: .4byte 0xfffff000
+_0800CFDC: .4byte gUnknown_203B0B4
+_0800CFE0:
+	adds r6, 0x1
+	movs r0, 0x80
+	lsls r0, 5
+	adds r4, r0
+	ldr r0, _0800D034
+	adds r5, r0
+_0800CFEC:
+	ldr r0, _0800D038
+	cmp r5, r0
+	ble _0800D002
+	adds r0, r6, 0
+	adds r1, r4, 0
+	bl sub_800D04C
+	lsls r0, 24
+	lsrs r2, r0, 24
+	cmp r2, 0
+	bne _0800CFE0
+_0800D002:
+	cmp r2, 0
+	beq _0800D03C
+	cmp r5, 0
+	ble _0800D02C
+	movs r2, 0x80
+	lsls r2, 5
+	mov r0, sp
+	movs r1, 0xFF
+	bl MemoryFill8
+	mov r0, sp
+	adds r1, r4, 0
+	adds r2, r5, 0
+	bl MemoryCopy8
+	adds r0, r6, 0
+	mov r1, sp
+	bl sub_800D04C
+	lsls r0, 24
+	lsrs r2, r0, 24
+_0800D02C:
+	cmp r2, 0
+	beq _0800D03C
+	movs r0, 0
+	b _0800D03E
+	.align 2, 0
+_0800D034: .4byte 0xfffff000
+_0800D038: .4byte 0x00000fff
+_0800D03C:
+	movs r0, 0x3
+_0800D03E:
+	movs r3, 0x80
+	lsls r3, 5
+	add sp, r3
+	pop {r4-r6}
+	pop {r1}
+	bx r1
+	thumb_func_end sub_800CFC0
+
+	thumb_func_start sub_800D04C
+sub_800D04C:
+	push {r4-r7,lr}
+	adds r5, r1, 0
+	movs r6, 0x3
+	ldr r7, _0800D07C
+	lsls r0, 16
+	lsrs r4, r0, 16
+_0800D058:
+	ldr r2, [r7]
+	adds r0, r4, 0
+	adds r1, r5, 0
+	bl _call_via_r2
+	lsls r0, 16
+	cmp r0, 0
+	bne _0800D080
+	adds r0, r4, 0
+	adds r1, r5, 0
+	movs r2, 0x80
+	lsls r2, 5
+	bl VerifyFlashSectorNBytes
+	cmp r0, 0
+	bne _0800D080
+	movs r0, 0x1
+	b _0800D08A
+	.align 2, 0
+_0800D07C: .4byte ProgramFlashSector
+_0800D080:
+	adds r0, r6, 0
+	subs r6, 0x1
+	cmp r0, 0
+	bgt _0800D058
+	movs r0, 0
+_0800D08A:
+	pop {r4-r7}
+	pop {r1}
+	bx r1
+	thumb_func_end sub_800D04C
+
+	.align 2, 0 @ Don't pad with nop.

ld_script.txt

@@ -50,6 +50,8 @@ SECTIONS {
         asm/code_800AAA0.o(.text);
         src/main.o(.text);
         asm/code_800B540.o(.text);
+        asm/flash.o(.text);
+        asm/code_800D090.o(.text);
         asm/m4a.o(.text);
         asm/syscall.o(.text);
         src/agb_flash.o(.text);