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

Source file repositories/reference/linux-study-clean/arch/sh/include/mach-dreamcast/mach/sysasic.h

File Facts

System
Linux kernel
Corpus path
arch/sh/include/mach-dreamcast/mach/sysasic.h
Extension
.h
Size
1569 bytes
Lines
47
Domain
Architecture Layer
Bucket
arch/sh
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef __ASM_SH_DREAMCAST_SYSASIC_H
#define __ASM_SH_DREAMCAST_SYSASIC_H

#include <asm/irq.h>

/* Hardware events -

   Each of these events correspond to a bit within the Event Mask Registers/
   Event Status Registers.  Because of the virtual IRQ numbering scheme, a
   base offset must be used when calculating the virtual IRQ that each event
   takes.
*/

#define HW_EVENT_IRQ_BASE  (48 + 16)

/* IRQ 13 */
#define HW_EVENT_VSYNC     (HW_EVENT_IRQ_BASE +  5) /* VSync */
#define HW_EVENT_MAPLE_DMA (HW_EVENT_IRQ_BASE + 12) /* Maple DMA complete */
#define HW_EVENT_GDROM_DMA (HW_EVENT_IRQ_BASE + 14) /* GD-ROM DMA complete */
#define HW_EVENT_G2_DMA    (HW_EVENT_IRQ_BASE + 15) /* G2 DMA complete */
#define HW_EVENT_PVR2_DMA  (HW_EVENT_IRQ_BASE + 19) /* PVR2 DMA complete */

/* IRQ 11 */
#define HW_EVENT_GDROM_CMD (HW_EVENT_IRQ_BASE + 32) /* GD-ROM cmd. complete */
#define HW_EVENT_AICA_SYS  (HW_EVENT_IRQ_BASE + 33) /* AICA-related */
#define HW_EVENT_EXTERNAL  (HW_EVENT_IRQ_BASE + 35) /* Ext. (expansion) */

#define HW_EVENT_IRQ_MAX (HW_EVENT_IRQ_BASE + 95)

/* arch/sh/boards/mach-dreamcast/irq.c */
extern int systemasic_irq_demux(int);
extern void systemasic_irq_init(void);

#endif /* __ASM_SH_DREAMCAST_SYSASIC_H */

Annotation

Implementation Notes