vga.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:1k
- /*
- * BK Id: SCCS/s.vga.h 1.5 05/17/01 18:14:26 cort
- */
- /*
- * Access to VGA videoram
- *
- * (c) 1998 Martin Mares <mj@ucw.cz>
- */
- #ifdef __KERNEL__
- #ifndef _LINUX_ASM_VGA_H_
- #define _LINUX_ASM_VGA_H_
- #include <asm/io.h>
- #include <linux/config.h>
- #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
- #define VT_BUF_HAVE_RW
- /*
- * These are only needed for supporting VGA or MDA text mode, which use little
- * endian byte ordering.
- * In other cases, we can optimize by using native byte ordering and
- * <linux/vt_buffer.h> has already done the right job for us.
- */
- extern inline void scr_writew(u16 val, volatile u16 *addr)
- {
- st_le16(addr, val);
- }
- extern inline u16 scr_readw(volatile const u16 *addr)
- {
- return ld_le16(addr);
- }
- #define VT_BUF_HAVE_MEMCPYW
- #define scr_memcpyw memcpy
- #endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
- extern unsigned long vgacon_remap_base;
- #define VGA_MAP_MEM(x) (x + vgacon_remap_base)
- #define vga_readb(x) (*(x))
- #define vga_writeb(x,y) (*(y) = (x))
- #endif
- #endif /* __KERNEL__ */