projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 */ |