interrupts.h

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/*---------------------------------------------------------------------------------

        Interrupt registers and vector pointers

        Copyright (C) 2005
                Jason Rogers (dovoto)
                Dave Murphy (WinterMute)

        This software is provided 'as-is', without any express or implied
        warranty.  In no event will the authors be held liable for any
        damages arising from the use of this software.

        Permission is granted to anyone to use this software for any
        purpose, including commercial applications, and to alter it and
        redistribute it freely, subject to the following restrictions:

        1.      The origin of this software must not be misrepresented; you
                must not claim that you wrote the original software. If you use
                this software in a product, an acknowledgment in the product
                documentation would be appreciated but is not required.

        2.      Altered source versions must be plainly marked as such, and
                must not be misrepresented as being the original software.

        3.      This notice may not be removed or altered from any source
                distribution.


---------------------------------------------------------------------------------*/

#ifndef NDS_INTERRUPTS_INCLUDE
#define NDS_INTERRUPTS_INCLUDE

#include <nds/ndstypes.h>

enum IRQ_MASKS {
        IRQ_VBLANK                      =       BIT(0),         
        IRQ_HBLANK                      =       BIT(1),         
        IRQ_VCOUNT                      =       BIT(2),         
        IRQ_TIMER0                      =       BIT(3),         
        IRQ_TIMER1                      =       BIT(4),         
        IRQ_TIMER2                      =       BIT(5),         
        IRQ_TIMER3                      =       BIT(6),         
        IRQ_NETWORK                     =       BIT(7),         
        IRQ_DMA0                        =       BIT(8),         
        IRQ_DMA1                        =       BIT(9),         
        IRQ_DMA2                        =       BIT(10),        
        IRQ_DMA3                        =       BIT(11),        
        IRQ_KEYS                        =       BIT(12),        
        IRQ_CART                        =       BIT(13),        
        IRQ_IPC_SYNC            =       BIT(16),        
        IRQ_FIFO_EMPTY          =       BIT(17),        
        IRQ_FIFO_NOT_EMPTY      =       BIT(18),        
        IRQ_CARD                        =       BIT(19),        
        IRQ_CARD_LINE           =       BIT(20),        
        IRQ_GEOMETRY_FIFO       =       BIT(21),        
        IRQ_LID                         =       BIT(22),        
        IRQ_SPI                         =       BIT(23),        
        IRQ_WIFI                        =       BIT(24),        
        IRQ_ALL                         =       (~0)
};

enum IRQ_MASKSAUX {
        IRQ_POWER       =       BIT(6)  
};

#define IRQ_TIMER(n) (1 << ((n) + 3))

#define MAX_INTERRUPTS  25

typedef enum IRQ_MASKS IRQ_MASK;

#define REG_IE  (*(vuint32*)0x04000210)

#define REG_AUXIE       (*(vuint32*)0x04000218)

#define REG_IF  (*(vuint32*)0x04000214)

#define REG_AUXIF       (*(vuint32*)0x0400021C)

#define REG_IME (*(vuint32*)0x04000208)

enum IME_VALUE {
        IME_DISABLE = 0,        
        IME_ENABLE = 1, 
};


#ifdef __cplusplus
extern "C" {
#endif


extern VoidFn   __irq_vector[];
extern  vuint32 __irq_flags[];
extern  vuint32 __irq_flagsaux[];

#define INTR_WAIT_FLAGS  *(__irq_flags)
#define INTR_WAIT_FLAGSAUX  *(__irq_flagsaux)
#define IRQ_HANDLER             *(__irq_vector)

struct IntTable{IntFn handler; u32 mask;};

void irqInit();
void irqSet(u32 irq, VoidFn handler);
void irqSetAUX(u32 irq, VoidFn handler);

void irqClear(u32 irq);
void irqClearAUX(u32 irq);
void irqInitHandler(VoidFn handler);
void irqEnable(u32 irq);
void irqEnableAUX(u32 irq);
void irqDisable(u32 irq);
void irqDisableAUX(u32 irq);

void swiIntrWait(u32 waitForSet, uint32 flags);

void swiWaitForVBlank(void);

static inline int enterCriticalSection() {
        int oldIME = REG_IME;
        REG_IME = 0;
        return oldIME;
}

static inline void leaveCriticalSection(int oldIME) {
        REG_IME = oldIME;
}


#ifdef __cplusplus
}
#endif

#endif //NDS_INTERRUPTS_INCLUDE

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