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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Access to VGA videoram
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*/
#ifndef _ASM_VGA_H
#define _ASM_VGA_H
#include <linux/string.h>
#include <asm/addrspace.h>
#include <asm/byteorder.h>
/*
* On the PC, we can just recalculate addresses and then
* access the videoram directly without any black magic.
*/
#define VGA_MAP_MEM(x, s) CKSEG1ADDR(0x10000000L + (unsigned long)(x))
#define vga_readb(x) (*(x))
#define vga_writeb(x, y) (*(y) = (x))
#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.
*/
#undef scr_writew
#undef scr_readw
static inline void scr_writew(u16 val, volatile u16 *addr)
{
*addr = cpu_to_le16(val);
}
static inline u16 scr_readw(volatile const u16 *addr)
{
return le16_to_cpu(*addr);
}
static inline void scr_memsetw(u16 *s, u16 v, unsigned int count)
{
memset16(s, cpu_to_le16(v), count / 2);
}
#define scr_memcpyw(d, s, c) memcpy(d, s, c)
#define scr_memmovew(d, s, c) memmove(d, s, c)
#define VT_BUF_HAVE_MEMCPYW
#define VT_BUF_HAVE_MEMMOVEW
#define VT_BUF_HAVE_MEMSETW
#endif /* _ASM_VGA_H */