arm9 OS_tick

arm9/asm/OS_tick.s

@@ -1,165 +0,0 @@
-    .include "asm/macros.inc"
-    .include "global.inc"
-
-	.section .bss
-
-	.global OSi_UseTick
-OSi_UseTick: ; 0x021D37AC
-	.space 0x4
-
-	.global OSi_NeedResetTimer
-OSi_NeedResetTimer: ; 0x021D37B0
-	.space 0x4
-
-	.global OSi_TickCounter
-OSi_TickCounter: ; 0x021D37B4
-	.space 0x8
-
-    .text
-
-	arm_func_start OS_GetTickLo
-OS_GetTickLo: ; 0x020CCC0C
-	ldr r0, _020CCC18 ; =0x04000100
-	ldrh r0, [r0, #0x0]
-	bx lr
-	.balign 4
-_020CCC18: .word 0x04000100
-
-	arm_func_start OS_GetTick
-OS_GetTick: ; 0x020CCC1C
-	stmdb sp!, {lr}
-	sub sp, sp, #0xc
-	bl OS_DisableInterrupts
-	ldr r1, _020CCCBC ; =0x04000100
-	ldr r3, _020CCCC0 ; =OSi_TickCounter
-	ldrh r12, [r1, #0x0]
-	ldr r2, _020CCCC4 ; =0x0000FFFF
-	mvn r1, #0x0
-	strh r12, [sp, #0x0]
-	ldr r12, [r3, #0x0]
-	ldr r3, [r3, #0x4]
-	and r1, r12, r1
-	and r2, r3, r2
-	str r1, [sp, #0x4]
-	ldr r1, _020CCCC8 ; =0x04000214
-	str r2, [sp, #0x8]
-	ldr r1, [r1, #0x0]
-	ands r1, r1, #0x8
-	beq _020CCC90
-	ldrh r1, [sp, #0x0]
-	ands r1, r1, #0x8000
-	bne _020CCC90
-	ldr r3, [sp, #0x4]
-	mov r1, #0x1
-	ldr r2, [sp, #0x8]
-	adds r3, r3, r1
-	adc r1, r2, #0x0
-	str r3, [sp, #0x4]
-	str r1, [sp, #0x8]
-_020CCC90:
-	bl OS_RestoreInterrupts
-	ldr r2, [sp, #0x4]
-	ldr r1, [sp, #0x8]
-	ldrh r0, [sp, #0x0]
-	mov r1, r1, lsl #0x10
-	orr r1, r1, r2, lsr #0x10
-	orr r1, r1, r0, asr #0x1f
-	orr r0, r0, r2, lsl #0x10
-	add sp, sp, #0xc
-	ldmia sp!, {lr}
-	bx lr
-	.balign 4
-_020CCCBC: .word 0x04000100
-_020CCCC0: .word OSi_TickCounter
-_020CCCC4: .word 0x0000FFFF
-_020CCCC8: .word 0x04000214
-
-	arm_func_start OSi_CountUpTick
-OSi_CountUpTick: ; 0x020CCCCC
-	stmdb sp!, {lr}
-	sub sp, sp, #0x4
-	ldr r2, _020CCD40 ; =OSi_TickCounter
-	ldr r1, _020CCD44 ; =OSi_NeedResetTimer
-	ldr r12, [r2, #0x0]
-	mov r0, #0x1
-	ldr r3, [r2, #0x4]
-	adds r12, r12, r0
-	ldr r0, [r1, #0x0]
-	adc r3, r3, #0x0
-	str r12, [r2, #0x0]
-	str r3, [r2, #0x4]
-	cmp r0, #0x0
-	mov r3, #0x0
-	beq _020CCD24
-	ldr r2, _020CCD48 ; =0x04000102
-	ldr r0, _020CCD4C ; =0x04000100
-	strh r3, [r2, #0x0]
-	strh r3, [r0, #0x0]
-	mov r0, #0xc1
-	strh r0, [r2, #0x0]
-	str r3, [r1, #0x0]
-_020CCD24:
-	mov r0, #0x0
-	ldr r1, _020CCD50 ; =OSi_CountUpTick
-	mov r2, r0
-	bl OSi_EnterTimerCallback
-	add sp, sp, #0x4
-	ldmia sp!, {lr}
-	bx lr
-	.balign 4
-_020CCD40: .word OSi_TickCounter
-_020CCD44: .word OSi_NeedResetTimer
-_020CCD48: .word 0x04000102
-_020CCD4C: .word 0x04000100
-_020CCD50: .word OSi_CountUpTick
-
-	arm_func_start OS_IsTickAvailable
-OS_IsTickAvailable: ; 0x020CCD54
-	ldr r0, _020CCD60 ; =OSi_UseTick
-	ldrh r0, [r0, #0x0]
-	bx lr
-	.balign 4
-_020CCD60: .word OSi_UseTick
-
-	arm_func_start OS_InitTick
-OS_InitTick: ; 0x020CCD64
-	stmdb sp!, {lr}
-	sub sp, sp, #0x4
-	ldr r1, _020CCDE8 ; =OSi_UseTick
-	ldrh r0, [r1, #0x0]
-	cmp r0, #0x0
-	addne sp, sp, #0x4
-	ldmneia sp!, {lr}
-	bxne lr
-	mov r2, #0x1
-	mov r0, #0x0
-	strh r2, [r1, #0x0]
-	bl OSi_SetTimerReserved
-	ldr r0, _020CCDEC ; =OSi_TickCounter
-	mov r2, #0x0
-	str r2, [r0, #0x0]
-	ldr r3, _020CCDF0 ; =0x04000102
-	str r2, [r0, #0x4]
-	ldr r0, _020CCDF4 ; =0x04000100
-	strh r2, [r3, #0x0]
-	ldr r1, _020CCDF8 ; =OSi_CountUpTick
-	strh r2, [r0, #0x0]
-	mov r2, #0xc1
-	mov r0, #0x8
-	strh r2, [r3, #0x0]
-	bl OS_SetIrqFunction
-	mov r0, #0x8
-	bl OS_EnableIrqMask
-	ldr r0, _020CCDFC ; =OSi_NeedResetTimer
-	mov r1, #0x0
-	str r1, [r0, #0x0]
-	add sp, sp, #0x4
-	ldmia sp!, {lr}
-	bx lr
-	.balign 4
-_020CCDE8: .word OSi_UseTick
-_020CCDEC: .word OSi_TickCounter
-_020CCDF0: .word 0x04000102
-_020CCDF4: .word 0x04000100
-_020CCDF8: .word OSi_CountUpTick
-_020CCDFC: .word OSi_NeedResetTimer

arm9/lib/include/OS_interrupt.h

@@ -1,9 +1,11 @@
 #ifndef POKEDIAMOND_ARM9_OS_INTERRUPT_H
 #define POKEDIAMOND_ARM9_OS_INTERRUPT_H
 
-#include "nitro/types.h"
+#include "consts.h"
 #include "nitro/OS_interrupt_shared.h"
 
+#define OS_IE_TIMER0        (1UL << REG_OS_IE_T0_SHIFT)
+
 typedef void (*OSIrqFunction) (void);
 
 typedef struct

arm9/lib/include/OS_tick.h

@@ -2,6 +2,7 @@
 #define POKEDIAMOND_OS_TICK_H
 
 #include "consts.h"
+#include "OS_timer.h"
 
 typedef u64 OSTick;
 
@@ -9,4 +10,12 @@ typedef u64 OSTick;
 
 #define OS_MilliSecondsToTicks(msec) ((OSTick)(((OS_SYSTEM_CLOCK/1000) * (u64)(msec)) / 64))
 
+#define OSi_TICK_TIMERCONTROL        (REG_OS_TM0CNT_H_E_MASK | REG_OS_TM0CNT_H_I_MASK | OS_TIMER_PRESCALER_64)
+
+void OS_InitTick(void);
+BOOL OS_IsTickAvailable(void);
+static void OSi_CountUpTick(void);
+OSTick OS_GetTick(void);
+u16 OS_GetTickLo(void);
+
 #endif //POKEDIAMOND_OS_TICK_H

arm9/lib/include/OS_timer.h

@@ -0,0 +1,32 @@
+#ifndef POKEDIAMOND_OS_TIMER_H
+#define POKEDIAMOND_OS_TIMER_H
+
+#include "consts.h"
+
+typedef enum
+{
+    OS_TIMER_PRESCALER_1 = (0UL << REG_OS_TM0CNT_H_PS_SHIFT),
+    OS_TIMER_PRESCALER_64 = (1UL << REG_OS_TM0CNT_H_PS_SHIFT),
+    OS_TIMER_PRESCALER_256 = (2UL << REG_OS_TM0CNT_H_PS_SHIFT),
+    OS_TIMER_PRESCALER_1024 = (3UL << REG_OS_TM0CNT_H_PS_SHIFT)
+} OSTimerPrescaler;
+
+typedef enum
+{
+    OS_TIMER_0 = 0,
+    OS_TIMER_1 = 1,
+    OS_TIMER_2 = 2,
+    OS_TIMER_3 = 3
+} OSTimer;
+
+static inline void OS_SetTimerCount(OSTimer id, u16 count)
+{
+    *((REGType16 *)((u32)&reg_OS_TM0CNT_L + id * 4)) = count;
+}
+
+static inline void OS_SetTimerControl(OSTimer id, u16 control)
+{
+    *((REGType16 *)((u32)&reg_OS_TM0CNT_H + id * 4)) = control;
+}
+
+#endif //POKEDIAMOND_OS_TIMER_H

arm9/lib/include/registers.h

@@ -356,6 +356,12 @@
 #define reg_MI_MCD1                (*(REGType32v *)0x4100010)
 #define reg_CARD_DATA              (*(REGType32v *)0x4100010) //?
 
+#define REG_OS_TM0CNT_H_PS_SHIFT                           0
+#define REG_OS_IE_T0_SHIFT                                 3
+
+#define REG_OS_TM0CNT_H_I_MASK                             0x0040
+#define REG_OS_TM0CNT_H_E_MASK                             0x0080
+
 #define REG_PAD_KEYINPUT_L_SHIFT                           9
 #define REG_PAD_KEYINPUT_L_SIZE                            1
 #define REG_PAD_KEYINPUT_L_MASK                            0x0200

arm9/lib/src/OS_tick.c

@@ -0,0 +1,70 @@
+#include "function_target.h"
+#include "OS_tick.h"
+#include "OS_interrupt.h"
+#include "OS_timer.h"
+#include "OS_system.h"
+
+static u16 OSi_UseTick = FALSE;
+vu64 OSi_TickCounter;
+BOOL OSi_NeedResetTimer = FALSE;
+
+extern void OSi_SetTimerReserved(u32 param1);
+
+ARM_FUNC void OS_InitTick(void)
+{
+    if (OSi_UseTick)
+    {
+        return;
+    }
+    OSi_UseTick = 1;
+    OSi_SetTimerReserved(0);
+    OSi_TickCounter = 0;
+    reg_OS_TM0CNT_H = 0;
+    reg_OS_TM0CNT_L = 0;
+    reg_OS_TM0CNT_H = 0xc1;
+    OS_SetIrqFunction(8, OSi_CountUpTick);
+    (void)OS_EnableIrqMask(8);
+    OSi_NeedResetTimer = FALSE;
+}
+
+ARM_FUNC BOOL OS_IsTickAvailable(void)
+{
+    return OSi_UseTick;
+}
+
+ARM_FUNC static void OSi_CountUpTick(void)
+{
+    OSi_TickCounter++;
+
+    if (OSi_NeedResetTimer)
+    {
+        OS_SetTimerControl(OS_TIMER_0, 0);
+        OS_SetTimerCount(OS_TIMER_0, 0);
+        OS_SetTimerControl(OS_TIMER_0, OSi_TICK_TIMERCONTROL);
+
+        OSi_NeedResetTimer = FALSE;
+    }
+
+    OSi_EnterTimerCallback(OS_TIMER_0, (void (*)(void *))OSi_CountUpTick, 0);
+}
+
+ARM_FUNC OSTick OS_GetTick(void)
+{
+    OSIntrMode prev = OS_DisableInterrupts();
+    vu16 countL = *(REGType16 *)((u32)&reg_OS_TM0CNT_L + OS_TIMER_0 * 4);
+    vu64 countH = OSi_TickCounter & 0xffffffffffffULL;
+
+    if (reg_OS_IF & OS_IE_TIMER0 && !(countL & 0x8000))
+    {
+        countH++;
+    }
+
+    (void)OS_RestoreInterrupts(prev);
+
+    return (countH << 16) | countL;
+}
+
+ARM_FUNC u16 OS_GetTickLo(void)
+{
+    return reg_OS_TM0CNT_L;
+}