arch/sh/include/mach-dreamcast/mach/sysasic.h

   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 */
  42 extern int systemasic_irq_demux(int);
  43 extern void systemasic_irq_init(void);
  44
  45 #endif /* __ASM_SH_DREAMCAST_SYSASIC_H */
  46