https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 41bccc98fb7931d63d03f326a746ac4d429c1dd3 authored by Linus Torvalds on 29 January 2024, 01:01:12 UTC
Linux 6.8-rc2
Linux 6.8-rc2
Tip revision: 41bccc9
vt_buffer.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* include/linux/vt_buffer.h -- Access to VT screen buffer
*
* (c) 1998 Martin Mares <mj@ucw.cz>
*
* This is a set of macros and functions which are used in the
* console driver and related code to access the screen buffer.
* In most cases the console works with simple in-memory buffer,
* but when handling hardware text mode consoles, we store
* the foreground console directly in video memory.
*/
#ifndef _LINUX_VT_BUFFER_H_
#define _LINUX_VT_BUFFER_H_
#include <linux/string.h>
#if IS_ENABLED(CONFIG_VGA_CONSOLE) || IS_ENABLED(CONFIG_MDA_CONSOLE)
#include <asm/vga.h>
#endif
#ifndef VT_BUF_HAVE_RW
#define scr_writew(val, addr) (*(addr) = (val))
#define scr_readw(addr) (*(addr))
#endif
#ifndef VT_BUF_HAVE_MEMSETW
static inline void scr_memsetw(u16 *s, u16 c, unsigned int count)
{
#ifdef VT_BUF_HAVE_RW
count /= 2;
while (count--)
scr_writew(c, s++);
#else
memset16(s, c, count / 2);
#endif
}
#endif
#ifndef VT_BUF_HAVE_MEMCPYW
static inline void scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
{
#ifdef VT_BUF_HAVE_RW
count /= 2;
while (count--)
scr_writew(scr_readw(s++), d++);
#else
memcpy(d, s, count);
#endif
}
#endif
#ifndef VT_BUF_HAVE_MEMMOVEW
static inline void scr_memmovew(u16 *d, const u16 *s, unsigned int count)
{
#ifdef VT_BUF_HAVE_RW
if (d < s)
scr_memcpyw(d, s, count);
else {
count /= 2;
d += count;
s += count;
while (count--)
scr_writew(scr_readw(--s), --d);
}
#else
memmove(d, s, count);
#endif
}
#endif
#endif