xref: /openbmc/linux/arch/mips/include/asm/vga.h (revision b2441318)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  *	Access to VGA videoram
4  *
5  *	(c) 1998 Martin Mares <mj@ucw.cz>
6  */
7 #ifndef _ASM_VGA_H
8 #define _ASM_VGA_H
9 
10 #include <linux/string.h>
11 #include <asm/addrspace.h>
12 #include <asm/byteorder.h>
13 
14 /*
15  *	On the PC, we can just recalculate addresses and then
16  *	access the videoram directly without any black magic.
17  */
18 
19 #define VGA_MAP_MEM(x, s)	CKSEG1ADDR(0x10000000L + (unsigned long)(x))
20 
21 #define vga_readb(x)	(*(x))
22 #define vga_writeb(x, y)	(*(y) = (x))
23 
24 #define VT_BUF_HAVE_RW
25 /*
26  *  These are only needed for supporting VGA or MDA text mode, which use little
27  *  endian byte ordering.
28  *  In other cases, we can optimize by using native byte ordering and
29  *  <linux/vt_buffer.h> has already done the right job for us.
30  */
31 
32 #undef scr_writew
33 #undef scr_readw
34 
scr_writew(u16 val,volatile u16 * addr)35 static inline void scr_writew(u16 val, volatile u16 *addr)
36 {
37 	*addr = cpu_to_le16(val);
38 }
39 
scr_readw(volatile const u16 * addr)40 static inline u16 scr_readw(volatile const u16 *addr)
41 {
42 	return le16_to_cpu(*addr);
43 }
44 
scr_memsetw(u16 * s,u16 v,unsigned int count)45 static inline void scr_memsetw(u16 *s, u16 v, unsigned int count)
46 {
47 	memset16(s, cpu_to_le16(v), count / 2);
48 }
49 
50 #define scr_memcpyw(d, s, c) memcpy(d, s, c)
51 #define scr_memmovew(d, s, c) memmove(d, s, c)
52 #define VT_BUF_HAVE_MEMCPYW
53 #define VT_BUF_HAVE_MEMMOVEW
54 #define VT_BUF_HAVE_MEMSETW
55 
56 #endif /* _ASM_VGA_H */
57