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/*
* 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>
extern unsigned char *vgacon_mmap;
static unsigned long VGA_MAP_MEM(unsigned long x)
{
if( vgacon_mmap == NULL )
{
/* This is our first time in this function. This whole thing
is a rather grim hack. We know we're going to get asked
to map a 32KB region between 0xb0000 and 0xb8000 because
that's what VGAs are. We used the boot time permanent
fixed map region, and map it to machine pages.
*/
if( x != 0xb8000 )
panic("Argghh! VGA Console is weird. 1:%08lx\n",x);
vgacon_mmap = (unsigned char*) bt_ioremap( 0xa0000, 128*1024 );
return (unsigned long) (vgacon_mmap+x-0xa0000);
}
else
{
if( x != 0xc0000 && x != 0xa0000 ) /* vidmem_end or charmap fonts */
panic("Argghh! VGA Console is weird. 2:%08lx\n",x);
return (unsigned long) (vgacon_mmap+x-0xa0000);
}
return 0;
}
static inline unsigned char vga_readb(unsigned char * x) { return (*(x)); }
static inline void vga_writeb(unsigned char x, unsigned char *y) { *(y) = (x); }
#endif
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