Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
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 | ||
ac036f95 | 10 | #include <linux/string.h> |
258e1e73 | 11 | #include <asm/addrspace.h> |
c0ec406c RB |
12 | #include <asm/byteorder.h> |
13 | ||
1da177e4 LT |
14 | /* |
15 | * On the PC, we can just recalculate addresses and then | |
16 | * access the videoram directly without any black magic. | |
17 | */ | |
18 | ||
258e1e73 | 19 | #define VGA_MAP_MEM(x, s) CKSEG1ADDR(0x10000000L + (unsigned long)(x)) |
1da177e4 LT |
20 | |
21 | #define vga_readb(x) (*(x)) | |
21a151d8 | 22 | #define vga_writeb(x, y) (*(y) = (x)) |
1da177e4 | 23 | |
c0ec406c RB |
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 | ||
fd2a4f11 RB |
32 | #undef scr_writew |
33 | #undef scr_readw | |
34 | ||
c0ec406c RB |
35 | static inline void scr_writew(u16 val, volatile u16 *addr) |
36 | { | |
37 | *addr = cpu_to_le16(val); | |
38 | } | |
39 | ||
40 | static inline u16 scr_readw(volatile const u16 *addr) | |
41 | { | |
42 | return le16_to_cpu(*addr); | |
43 | } | |
44 | ||
ac036f95 MW |
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 | ||
c0ec406c RB |
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 | |
ac036f95 | 54 | #define VT_BUF_HAVE_MEMSETW |
c0ec406c | 55 | |
1da177e4 | 56 | #endif /* _ASM_VGA_H */ |