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33 lines
740 B
33 lines
740 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Access to VGA videoram |
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* |
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* (c) 1998 Martin Mares <[email protected]> |
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*/ |
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#ifndef _ASM_X86_VGA_H |
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#define _ASM_X86_VGA_H |
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#include <asm/set_memory.h> |
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/* |
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* On the PC, we can just recalculate addresses and then |
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* access the videoram directly without any black magic. |
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* To support memory encryption however, we need to access |
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* the videoram as decrypted memory. |
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*/ |
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#define VGA_MAP_MEM(x, s) \ |
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({ \ |
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unsigned long start = (unsigned long)phys_to_virt(x); \ |
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\ |
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if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT)) \ |
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set_memory_decrypted(start, (s) >> PAGE_SHIFT); \ |
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\ |
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start; \ |
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}) |
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#define vga_readb(x) (*(x)) |
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#define vga_writeb(x, y) (*(y) = (x)) |
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#endif /* _ASM_X86_VGA_H */
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