starting to separate platform-specific code to facilitate a PC build

[gbajam22] / src / gba / intr.h

diff --git a/src/gba/intr.h b/src/gba/intr.h
new file mode 100644 (file)
index 0000000..859b9a7
--- /dev/null
+++ b/src/gba/intr.h
@@ -0,0 +1,39 @@
+#ifndef INTR_H_
+#define INTR_H_
+
+#include "gbaregs.h"
+
+/* interrupts */
+enum {
+       INTR_VBLANK,
+       INTR_HBLANK,
+       INTR_VCOUNT,
+       INTR_TIMER0,
+       INTR_TIMER1,
+       INTR_TIMER2,
+       INTR_TIMER3,
+       INTR_COMM,
+       INTR_DMA0,
+       INTR_DMA1,
+       INTR_DMA2,
+       INTR_DMA3,
+       INTR_KEY,
+       INTR_GPAK
+};
+
+void intr_init(void);
+
+/* set/clear interrupts */
+#define intr_enable()  \
+       do { REG_IME |= 0x0001; } while(0)
+#define intr_disable() \
+       do { REG_IME &= 0xfffe; } while(0)
+
+/* set an interrupt handler */
+void interrupt(int intr, void (*handler)(void));
+
+/* mask/unmask an interrupt */
+#define mask(intr)             do {REG_IE &= ~(1 << (intr));} while(0)
+#define unmask(intr)   do {REG_IE |= 1 << (intr);} while(0)
+
+#endif /* INTR_H_ */