include/asm-sh/dreamcast/sysasic.h

   1 /* include/asm-sh/dc_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  *
   7  * This file is part of the LinuxDC project (www.linuxdc.org)
   8  *
   9  * Released under the terms of the GNU GPL v2.0.
  10  *
  11  */
  12
  13 #include <asm/irq.h>
  14
  15 /* Hardware events -
  16
  17    Each of these events correspond to a bit within the Event Mask Registers/
  18    Event Status Registers.  Because of the virtual IRQ numbering scheme, a
  19    base offset must be used when calculating the virtual IRQ that each event
  20    takes.
  21 */
  22
  23 #define HW_EVENT_IRQ_BASE  OFFCHIP_IRQ_BASE /* 48 */
  24
  25 /* IRQ 13 */
  26 #define HW_EVENT_VSYNC     (HW_EVENT_IRQ_BASE +  5) /* VSync */
  27 #define HW_EVENT_MAPLE_DMA (HW_EVENT_IRQ_BASE + 12) /* Maple DMA complete */
  28 #define HW_EVENT_GDROM_DMA (HW_EVENT_IRQ_BASE + 14) /* GD-ROM DMA complete */
  29
  30 /* IRQ 11 */
  31 #define HW_EVENT_GDROM_CMD (HW_EVENT_IRQ_BASE + 32) /* GD-ROM cmd. complete */
  32 #define HW_EVENT_AICA_SYS  (HW_EVENT_IRQ_BASE + 33) /* AICA-related */
  33 #define HW_EVENT_EXTERNAL  (HW_EVENT_IRQ_BASE + 35) /* Ext. (expansion) */
  34
  35 #define HW_EVENT_IRQ_MAX (HW_EVENT_IRQ_BASE + 95)