vga.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * Access to VGA videoram
- *
- * (c) 1998 Martin Mares <mj@ucw.cz>
- */
- #ifndef _LINUX_ASM_VGA_H_
- #define _LINUX_ASM_VGA_H_
- #include <asm/io.h>
- #define VT_BUF_HAVE_RW
- #define VT_BUF_HAVE_MEMSETW
- #define VT_BUF_HAVE_MEMCPYW
- extern inline void scr_writew(u16 val, volatile u16 *addr)
- {
- if (__is_ioaddr((unsigned long) addr))
- __raw_writew(val, (unsigned long) addr);
- else
- *addr = val;
- }
- extern inline u16 scr_readw(volatile const u16 *addr)
- {
- if (__is_ioaddr((unsigned long) addr))
- return __raw_readw((unsigned long) addr);
- else
- return *addr;
- }
- extern inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
- {
- if (__is_ioaddr((unsigned long) s))
- memsetw_io(s, c, count);
- else
- memsetw(s, c, count);
- }
- /* Do not trust that the usage will be correct; analyze the arguments. */
- extern void scr_memcpyw(u16 *d, const u16 *s, unsigned int count);
- /* ??? These are currently only used for downloading character sets. As
- such, they don't need memory barriers. Is this all they are intended
- to be used for? */
- #define vga_readb readb
- #define vga_writeb writeb
- #define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
- #endif