1 /* include/asm-sh/dreamcast/sysasic.h
2  *
3  * Definitions for the Dreamcast System ASIC and related peripherals.
4  *
5  * Copyright (c) 2001 M. R. Brown <mrbrown@linuxdc.org>
6  * Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
7  *
8  * This file is part of the LinuxDC project (www.linuxdc.org)
9  *
10  * Released under the terms of the GNU GPL v2.0.
11  *
12  */
13 #ifndef __ASM_SH_DREAMCAST_SYSASIC_H
14 #define __ASM_SH_DREAMCAST_SYSASIC_H
15 
16 #include <asm/irq.h>
17 
18 /* Hardware events -
19 
20    Each of these events correspond to a bit within the Event Mask Registers/
21    Event Status Registers.  Because of the virtual IRQ numbering scheme, a
22    base offset must be used when calculating the virtual IRQ that each event
23    takes.
24 */
25 
26 #define HW_EVENT_IRQ_BASE  48
27 
28 /* IRQ 13 */
29 #define HW_EVENT_VSYNC     (HW_EVENT_IRQ_BASE +  5) /* VSync */
30 #define HW_EVENT_MAPLE_DMA (HW_EVENT_IRQ_BASE + 12) /* Maple DMA complete */
31 #define HW_EVENT_GDROM_DMA (HW_EVENT_IRQ_BASE + 14) /* GD-ROM DMA complete */
32 #define HW_EVENT_G2_DMA    (HW_EVENT_IRQ_BASE + 15) /* G2 DMA complete */
33 #define HW_EVENT_PVR2_DMA  (HW_EVENT_IRQ_BASE + 19) /* PVR2 DMA complete */
34 
35 /* IRQ 11 */
36 #define HW_EVENT_GDROM_CMD (HW_EVENT_IRQ_BASE + 32) /* GD-ROM cmd. complete */
37 #define HW_EVENT_AICA_SYS  (HW_EVENT_IRQ_BASE + 33) /* AICA-related */
38 #define HW_EVENT_EXTERNAL  (HW_EVENT_IRQ_BASE + 35) /* Ext. (expansion) */
39 
40 #define HW_EVENT_IRQ_MAX (HW_EVENT_IRQ_BASE + 95)
41 
42 /* arch/sh/boards/mach-dreamcast/irq.c */
43 extern int systemasic_irq_demux(int);
44 extern void systemasic_irq_init(void);
45 extern void aica_time_init(void);
46 
47 #endif /* __ASM_SH_DREAMCAST_SYSASIC_H */
48 
49