vga.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2#ifndef _ASM_POWERPC_VGA_H_
 3#define _ASM_POWERPC_VGA_H_
 4
 5#ifdef __KERNEL__
 6
 7/*
 8 *	Access to VGA videoram
 9 *
10 *	(c) 1998 Martin Mares <mj@ucw.cz>
11 */
12
13
14#include <asm/io.h>
15
16
17#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_MDA_CONSOLE)
18
19#define VT_BUF_HAVE_RW
20/*
21 *  These are only needed for supporting VGA or MDA text mode, which use little
22 *  endian byte ordering.
23 *  In other cases, we can optimize by using native byte ordering and
24 *  <linux/vt_buffer.h> has already done the right job for us.
25 */
26
27static inline void scr_writew(u16 val, volatile u16 *addr)
28{
29	*addr = cpu_to_le16(val);
30}
31
32static inline u16 scr_readw(volatile const u16 *addr)
33{
34	return le16_to_cpu(*addr);
35}
36
37#define VT_BUF_HAVE_MEMSETW
38static inline void scr_memsetw(u16 *s, u16 v, unsigned int n)
39{
40	memset16(s, cpu_to_le16(v), n / 2);
41}
42
43#endif /* !CONFIG_VGA_CONSOLE && !CONFIG_MDA_CONSOLE */
44
45#ifdef __powerpc64__
46#define VGA_MAP_MEM(x,s) ((unsigned long) ioremap((x), s))
47#else
48#define VGA_MAP_MEM(x,s) (x)
49#endif
50
51#define vga_readb(x) (*(x))
52#define vga_writeb(x,y) (*(y) = (x))
53
54#endif	/* __KERNEL__ */
55#endif	/* _ASM_POWERPC_VGA_H_ */