arch/m68k/include/asm/vga.h

Source file repositories/reference/linux-study-clean/arch/m68k/include/asm/vga.h

File Facts

System
Linux kernel
Corpus path
arch/m68k/include/asm/vga.h
Extension
.h
Size
902 bytes
Lines
38
Domain
Architecture Layer
Bucket
arch/m68k
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_M68K_VGA_H
#define _ASM_M68K_VGA_H

/*
 * Some ColdFire platforms do in fact have a PCI bus. So for those we want
 * to use the real IO access functions, don't fake them out or redirect them
 * for that case.
 */
#ifndef CONFIG_PCI

#include <asm/io.h>
#include <asm/kmap.h>

/*
 * FIXME
 * Ugh, we don't have PCI space, so map readb() and friends to use raw I/O
 * accessors, which are identical to the z_*() Zorro bus accessors.
 * This should make cirrusfb work again on Amiga
 */
#undef inb_p
#undef inw_p
#undef outb_p
#undef outw
#undef readb
#undef writeb
#undef writew
#define inb_p(port)		0
#define inw_p(port)		0
#define outb_p(port, val)	do { } while (0)
#define outw(port, val)		do { } while (0)
#define readb			__raw_readb
#define writeb			__raw_writeb
#define writew			__raw_writew

#endif /* CONFIG_PCI */
#endif /* _ASM_M68K_VGA_H */

Annotation

Implementation Notes