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