1/* SPDX-License-Identifier: GPL-2.0
 2 *
 3 * include/asm-sh/dreamcast/sysasic.h
 4 *
 5 * Definitions for the Dreamcast System ASIC and related peripherals.
 6 *
 7 * Copyright (c) 2001 M. R. Brown <mrbrown@linuxdc.org>
 8 * Copyright (C) 2003 Paul Mundt <lethal@linux-sh.org>
 9 *
10 * This file is part of the LinuxDC project (www.linuxdc.org)
11 */
12#ifndef __ASM_SH_DREAMCAST_SYSASIC_H
13#define __ASM_SH_DREAMCAST_SYSASIC_H
14
15#include <asm/irq.h>
16
17/* Hardware events -
18
19   Each of these events correspond to a bit within the Event Mask Registers/
20   Event Status Registers.  Because of the virtual IRQ numbering scheme, a
21   base offset must be used when calculating the virtual IRQ that each event
22   takes.
23*/
24
25#define HW_EVENT_IRQ_BASE  48
26
27/* IRQ 13 */
28#define HW_EVENT_VSYNC     (HW_EVENT_IRQ_BASE +  5) /* VSync */
29#define HW_EVENT_MAPLE_DMA (HW_EVENT_IRQ_BASE + 12) /* Maple DMA complete */
30#define HW_EVENT_GDROM_DMA (HW_EVENT_IRQ_BASE + 14) /* GD-ROM DMA complete */
31#define HW_EVENT_G2_DMA    (HW_EVENT_IRQ_BASE + 15) /* G2 DMA complete */
32#define HW_EVENT_PVR2_DMA  (HW_EVENT_IRQ_BASE + 19) /* PVR2 DMA complete */
33
34/* IRQ 11 */
35#define HW_EVENT_GDROM_CMD (HW_EVENT_IRQ_BASE + 32) /* GD-ROM cmd. complete */
36#define HW_EVENT_AICA_SYS  (HW_EVENT_IRQ_BASE + 33) /* AICA-related */
37#define HW_EVENT_EXTERNAL  (HW_EVENT_IRQ_BASE + 35) /* Ext. (expansion) */
38
39#define HW_EVENT_IRQ_MAX (HW_EVENT_IRQ_BASE + 95)
40
41/* arch/sh/boards/mach-dreamcast/irq.c */
42extern int systemasic_irq_demux(int);
43extern void systemasic_irq_init(void);
44
45#endif /* __ASM_SH_DREAMCAST_SYSASIC_H */
46