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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/sh/include/mach-dreamcast/mach/sysasic.h
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/* SPDX-License-Identifier: GPL-2.0

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 *

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 * include/asm-sh/dreamcast/sysasic.h

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 *

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 * Definitions for the Dreamcast System ASIC and related peripherals.

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 *

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 * Copyright (c) 2001 M. R. Brown <[email protected]>

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 * Copyright (C) 2003 Paul Mundt <[email protected]>

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 *

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 * This file is part of the LinuxDC project (www.linuxdc.org)

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 */

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#ifndef __ASM_SH_DREAMCAST_SYSASIC_H

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#define __ASM_SH_DREAMCAST_SYSASIC_H

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#include <asm/irq.h>

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/* Hardware events -

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   Each of these events correspond to a bit within the Event Mask Registers/

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   Event Status Registers.  Because of the virtual IRQ numbering scheme, a

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   base offset must be used when calculating the virtual IRQ that each event

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   takes.

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*/

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#define HW_EVENT_IRQ_BASE  (48 + 16)

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/* IRQ 13 */

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#define HW_EVENT_VSYNC     (HW_EVENT_IRQ_BASE +  5) /* VSync */

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#define HW_EVENT_MAPLE_DMA (HW_EVENT_IRQ_BASE + 12) /* Maple DMA complete */

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#define HW_EVENT_GDROM_DMA (HW_EVENT_IRQ_BASE + 14) /* GD-ROM DMA complete */

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#define HW_EVENT_G2_DMA    (HW_EVENT_IRQ_BASE + 15) /* G2 DMA complete */

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#define HW_EVENT_PVR2_DMA  (HW_EVENT_IRQ_BASE + 19) /* PVR2 DMA complete */

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/* IRQ 11 */

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#define HW_EVENT_GDROM_CMD (HW_EVENT_IRQ_BASE + 32) /* GD-ROM cmd. complete */

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#define HW_EVENT_AICA_SYS  (HW_EVENT_IRQ_BASE + 33) /* AICA-related */

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#define HW_EVENT_EXTERNAL  (HW_EVENT_IRQ_BASE + 35) /* Ext. (expansion) */

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#define HW_EVENT_IRQ_MAX (HW_EVENT_IRQ_BASE + 95)

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/* arch/sh/boards/mach-dreamcast/irq.c */

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extern int systemasic_irq_demux(int);

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extern void systemasic_irq_init(void);

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#endif /* __ASM_SH_DREAMCAST_SYSASIC_H */

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