34 lines
740 B
C
34 lines
740 B
C
/* 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 <mj@ucw.cz>
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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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