[linux-block.git] / arch / x86 / include / asm / vga.h

/* 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 */
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
1965aae3 PA	8	#ifndef _ASM_X86_VGA_H
1965aae3 PA	9	#define _ASM_X86_VGA_H
1da177e4	10
95cf9264 TL	11	#include <asm/set_memory.h>
95cf9264 TL	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
95cf9264 TL	17	* the videoram as decrypted memory.
1da177e4 LT	18	*/
1da177e4 LT	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
1da177e4 LT	30	#define vga_readb(x) (*(x))
364fe5ef	31	#define vga_writeb(x, y) (*(y) = (x))
1da177e4	32
1965aae3	33	#endif /* _ASM_X86_VGA_H */