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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 | ||
1965aae3 PA |
8 | #ifndef _ASM_X86_VGA_H |
9 | #define _ASM_X86_VGA_H | |
1da177e4 | 10 | |
95cf9264 TL |
11 | #include <asm/set_memory.h> |
12 | ||
1da177e4 LT |
13 | /* |
14 | * On the PC, we can just recalculate addresses and then | |
15 | * access the videoram directly without any black magic. | |
95cf9264 TL |
16 | * To support memory encryption however, we need to access |
17 | * the videoram as decrypted memory. | |
1da177e4 LT |
18 | */ |
19 | ||
95cf9264 TL |
20 | #define VGA_MAP_MEM(x, s) \ |
21 | ({ \ | |
22 | unsigned long start = (unsigned long)phys_to_virt(x); \ | |
23 | \ | |
24 | if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) \ | |
25 | set_memory_decrypted(start, (s) >> PAGE_SHIFT); \ | |
26 | \ | |
27 | start; \ | |
28 | }) | |
1da177e4 LT |
29 | |
30 | #define vga_readb(x) (*(x)) | |
364fe5ef | 31 | #define vga_writeb(x, y) (*(y) = (x)) |
1da177e4 | 32 | |
1965aae3 | 33 | #endif /* _ASM_X86_VGA_H */ |