/* SPDX-License-Identifier: GPL-2.0 */
/*
 *      Access to VGA videoram
 *
 *      (c) 1998 Martin Mares <mj@ucw.cz>
 */

#ifndef _ASM_X86_VGA_H
#define _ASM_X86_VGA_H

#include <asm/set_memory.h>

/*
 *      On the PC, we can just recalculate addresses and then
 *      access the videoram directly without any black magic.
 *      To support memory encryption however, we need to access
 *      the videoram as decrypted memory.
 */

#define VGA_MAP_MEM(x, s)                                       \
({                                                              \
        unsigned long start = (unsigned long)phys_to_virt(x);   \
                                                                \
        if (IS_ENABLED(CONFIG_AMD_MEM_ENCRYPT))                 \
                set_memory_decrypted(start, (s) >> PAGE_SHIFT); \
                                                                \
        start;                                                  \
})

#define vga_readb(x) (*(x))
#define vga_writeb(x, y) (*(y) = (x))

#endif /* _ASM_X86_VGA_H */