--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/nucleus/demo/calirq.h	Thu Jun 09 00:02:41 2016 +0000
@@ -0,0 +1,95 @@
+/*
+ * Definitions for Calypso IRQ numbers and the related registers
+ * Added to the FreeNucleus Calypso port by Spacefalcon the Outlaw.
+ *
+ * This header is usable from both .c and .S source files.
+ */
+
+#ifndef _CALYPSO_IRQ_H
+#define _CALYPSO_IRQ_H
+
+#define	IRQ_WATCHDOG		0
+#define	IRQ_TIMER1		1
+#define	IRQ_TIMER2		2
+#define	IRQ_TSP_RX		3
+#define	IRQ_TPU_FRAME		4
+#define	IRQ_TPU_PAGE		5
+#define	IRQ_SIMCARD		6
+#define	IRQ_UART_MODEM		7
+#define	IRQ_KEYPAD_GPIO		8
+#define	IRQ_RTC_TIMER		9
+#define	IRQ_RTC_ALARM_I2C	10
+#define	IRQ_ULPD_GAUGING	11
+#define	IRQ_EXTERNAL		12
+#define	IRQ_SPI			13
+#define	IRQ_DMA			14
+#define	IRQ_API			15
+#define	IRQ_SIM_DETECT		16
+#define	IRQ_EXTERNAL_FIQ	17
+#define	IRQ_UART_IRDA		18
+#define	IRQ_ULPD_GSM_TIMER	19
+#define	IRQ_GEA			20
+
+#define	MAX_IRQ_NUM		20
+
+#define	INTH_BASE_ADDR		0xFFFFFA00
+
+#ifdef __ASSEMBLER__
+
+/*
+ * Assembly source with cpp
+ *
+ * The most convenient way to access registers like these from ARM
+ * assembly is to load the base address of the register block in some
+ * ARM register, using only one ldr rN, =xxx instruction and only one
+ * literal pool entry, and then access various registers in the block
+ * from the same base using the immediate offset addressing mode.
+ *
+ * Here we define the offsets for the usage scenario above.
+ */
+
+#define	IT_REG1		0x00
+#define	IT_REG2		0x02
+#define	MASK_IT_REG1	0x08
+#define	MASK_IT_REG2	0x0A
+#define	IRQ_NUM		0x10
+#define	FIQ_NUM		0x12
+#define	IRQ_CTRL	0x14
+#define	ILR_OFFSET	0x20
+
+#else
+
+/*
+ * C source
+ *
+ * For access from C, we define the layout of the INTH register block
+ * as a struct, and then define a pleudo-global-var for easy "volatile"
+ * access.
+ */
+
+struct inth_regs {
+	unsigned short	it_reg1;
+	unsigned short	it_reg2;
+	unsigned short	pad1[2];
+	unsigned short	mask_it_reg1;
+	unsigned short	mask_it_reg2;
+	unsigned short	pad2[2];
+	unsigned short	irq_num;
+	unsigned short	fiq_num;
+	unsigned short	irq_ctrl;
+	unsigned short	pad3[5];
+	unsigned short	ilr_irq[MAX_IRQ_NUM+1];
+};
+
+#define	INTH_REGS	(*(volatile struct inth_regs *) INTH_BASE_ADDR)
+
+/*
+ * C code can now access INTH registers like this:
+ *
+ * old_mask = INTH_REGS.mask_it_reg1;
+ * INTH_REGS.mask_it_reg1 = new_mask;
+ */
+
+#endif
+
+#endif /* _CALYPSO_IRQ_H */