1 files changed, 138 insertions, 0 deletions
diff --git a/arm7/asm/OS_tick.s b/arm7/asm/OS_tick.s
new file mode 100644
index 00000000..40589867
--- /dev/null
+++ b/arm7/asm/OS_tick.s
@@ -0,0 +1,138 @@
+    .include "asm/macros.inc"
+    .include "global.inc"
+
+    .text
+
+	arm_func_start OS_GetTick
+OS_GetTick: ; 0x037FA364
+	stmfd	sp!, {lr}
+	sub	sp, sp, #12
+	bl	OS_DisableInterrupts
+	ldr	r1, _037FA404	; =0x04000100
+	ldrh	r1, [r1]
+	strh	r1, [sp]
+	ldr	r1, _037FA408	; =OSi_TickCounter
+	ldr	ip, [r1]
+	ldr	r3, [r1, #4]
+	ldr	r2, _037FA40C	; =0x0000FFFF
+	mvn	r1, #0
+	and	r2, r3, r2
+	and	r1, ip, r1
+	str	r1, [sp, #4]
+	str	r2, [sp, #8]
+	ldr	r1, _037FA410	; =0x04000214
+	ldr	r1, [r1]
+	ands	r1, r1, #8
+	beq	_037FA3D8
+	ldrh	r1, [sp]
+	ands	r1, r1, #32768	; 0x8000
+	bne	_037FA3D8
+	ldr	r3, [sp, #4]
+	ldr	r2, [sp, #8]
+	mov	r1, #1
+	adds	r3, r3, r1
+	adc	r1, r2, #0
+	str	r3, [sp, #4]
+	str	r1, [sp, #8]
+_037FA3D8:
+	bl	OS_RestoreInterrupts
+	ldr	r2, [sp, #4]
+	ldr	r0, [sp, #8]
+	mov	r1, r0, lsl #16
+	orr	r1, r1, r2, lsr #16
+	ldrh	r0, [sp]
+	orr	r1, r1, r0, asr #31
+	orr	r0, r0, r2, lsl #16
+	add	sp, sp, #12
+	ldmia	sp!, {lr}
+	bx	lr
+_037FA404:	.word	0x04000100
+_037FA408:	.word	OSi_TickCounter
+_037FA40C:	.word	0x0000FFFF
+_037FA410:	.word	0x04000214
+
+	arm_func_start OSi_CountUpTick
+OSi_CountUpTick: ; 0x037FA414
+	stmfd	sp!, {lr}
+	sub	sp, sp, #4
+	ldr	r1, _037FA488	; =OSi_TickCounter
+	ldr	ip, [r1]
+	ldr	r2, [r1, #4]
+	mov	r3, #0
+	mov	r0, #1
+	adds	ip, ip, r0
+	adc	r0, r2, #0
+	str	ip, [r1]
+	str	r0, [r1, #4]
+	ldr	r0, _037FA48C	; =OSi_NeedResetTimer
+	ldr	r1, [r0]
+	cmp	r1, #0
+	beq	_037FA46C
+	ldr	r2, _037FA490	; =0x04000102
+	strh	r3, [r2]
+	ldr	r1, _037FA494	; =0x04000100
+	strh	r3, [r1]
+	mov	r1, #193	; 0xc1
+	strh	r1, [r2]
+	str	r3, [r0]
+_037FA46C:
+	mov	r0, #0
+	ldr	r1, _037FA498	; =OSi_CountUpTick
+	mov	r2, r0
+	bl	OSi_EnterTimerCallback
+	add	sp, sp, #4
+	ldmia	sp!, {lr}
+	bx	lr
+_037FA488:	.word	OSi_TickCounter
+_037FA48C:	.word	OSi_NeedResetTimer
+_037FA490:	.word	0x04000102
+_037FA494:	.word	0x04000100
+_037FA498:	.word	OSi_CountUpTick
+
+	arm_func_start OS_IsTickAvailable
+OS_IsTickAvailable: ; 0x037FA49C
+	ldr	r0, _037FA4A8	; =_03807920
+	ldrh	r0, [r0]
+	bx	lr
+_037FA4A8:	.word	_03807920
+
+	arm_func_start OS_InitTick
+OS_InitTick: ; 0x037FA4AC
+	stmfd	sp!, {lr}
+	sub	sp, sp, #4
+	ldr	r0, _037FA528	; =_03807920
+	ldrh	r1, [r0]
+	cmp	r1, #0
+	bne	_037FA51C
+	mov	r1, #1
+	strh	r1, [r0]
+	mov	r0, #0
+	bl	OSi_SetTimerReserved
+	mov	r2, #0
+	ldr	r0, _037FA52C	; =OSi_TickCounter
+	str	r2, [r0]
+	str	r2, [r0, #4]
+	ldr	r1, _037FA530	; =0x04000102
+	strh	r2, [r1]
+	ldr	r0, _037FA534	; =0x04000100
+	strh	r2, [r0]
+	mov	r0, #193	; 0xc1
+	strh	r0, [r1]
+	mov	r0, #8
+	ldr	r1, _037FA538	; =OSi_CountUpTick
+	bl	OS_SetIrqFunction
+	mov	r0, #8
+	bl	OS_EnableIrqMask
+	mov	r1, #0
+	ldr	r0, _037FA53C	; =OSi_NeedResetTimer
+	str	r1, [r0]
+_037FA51C:
+	add	sp, sp, #4
+	ldmia	sp!, {lr}
+	bx	lr
+_037FA528:	.word	_03807920
+_037FA52C:	.word	OSi_TickCounter
+_037FA530:	.word	0x04000102
+_037FA534:	.word	0x04000100
+_037FA538:	.word	OSi_CountUpTick
+_037FA53C:	.word	OSi_NeedResetTimer