cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vga.h (1291B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 *	Access to VGA videoram
      4 *
      5 *	(c) 1998 Martin Mares <mj@ucw.cz>
      6 */
      7#ifndef _ASM_VGA_H
      8#define _ASM_VGA_H
      9
     10#include <linux/string.h>
     11#include <asm/addrspace.h>
     12#include <asm/byteorder.h>
     13
     14/*
     15 *	On the PC, we can just recalculate addresses and then
     16 *	access the videoram directly without any black magic.
     17 */
     18
     19#define VGA_MAP_MEM(x, s)	CKSEG1ADDR(0x10000000L + (unsigned long)(x))
     20
     21#define vga_readb(x)	(*(x))
     22#define vga_writeb(x, y)	(*(y) = (x))
     23
     24#define VT_BUF_HAVE_RW
     25/*
     26 *  These are only needed for supporting VGA or MDA text mode, which use little
     27 *  endian byte ordering.
     28 *  In other cases, we can optimize by using native byte ordering and
     29 *  <linux/vt_buffer.h> has already done the right job for us.
     30 */
     31
     32#undef scr_writew
     33#undef scr_readw
     34
     35static inline void scr_writew(u16 val, volatile u16 *addr)
     36{
     37	*addr = cpu_to_le16(val);
     38}
     39
     40static inline u16 scr_readw(volatile const u16 *addr)
     41{
     42	return le16_to_cpu(*addr);
     43}
     44
     45static inline void scr_memsetw(u16 *s, u16 v, unsigned int count)
     46{
     47	memset16(s, cpu_to_le16(v), count / 2);
     48}
     49
     50#define scr_memcpyw(d, s, c) memcpy(d, s, c)
     51#define scr_memmovew(d, s, c) memmove(d, s, c)
     52#define VT_BUF_HAVE_MEMCPYW
     53#define VT_BUF_HAVE_MEMMOVEW
     54#define VT_BUF_HAVE_MEMSETW
     55
     56#endif /* _ASM_VGA_H */