mirror of
https://github.com/xcat2/xNBA.git
synced 2025-05-03 02:05:52 +00:00
[linux] Add timer
Add linux timer API. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
parent
18d3c12b01
commit
01a4c244db
@ -8,6 +8,7 @@
|
||||
*/
|
||||
|
||||
#define CONSOLE_LINUX
|
||||
#define TIMER_LINUX
|
||||
|
||||
#define IMAGE_SCRIPT
|
||||
|
||||
|
18
src/include/ipxe/linux/linux_timer.h
Normal file
18
src/include/ipxe/linux/linux_timer.h
Normal file
@ -0,0 +1,18 @@
|
||||
#ifndef _IPXE_LINUX_TIMER_H
|
||||
#define _IPXE_LINUX_TIMER_H
|
||||
|
||||
/** @file
|
||||
*
|
||||
* iPXE timer API for Linux
|
||||
*
|
||||
*/
|
||||
|
||||
FILE_LICENCE ( GPL2_OR_LATER );
|
||||
|
||||
#ifdef TIMER_LINUX
|
||||
#define TIMER_PREFIX_linux
|
||||
#else
|
||||
#define TIMER_PREFIX_linux __linux_
|
||||
#endif
|
||||
|
||||
#endif /* _IPXE_LINUX_TIMER_H */
|
@ -45,6 +45,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
|
||||
|
||||
/* Include all architecture-independent I/O API headers */
|
||||
#include <ipxe/efi/efi_timer.h>
|
||||
#include <ipxe/linux/linux_timer.h>
|
||||
|
||||
/* Include all architecture-dependent I/O API headers */
|
||||
#include <bits/timer.h>
|
||||
|
80
src/interface/linux/linux_timer.c
Normal file
80
src/interface/linux/linux_timer.c
Normal file
@ -0,0 +1,80 @@
|
||||
/*
|
||||
* Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License as
|
||||
* published by the Free Software Foundation; either version 2 of the
|
||||
* License, or any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
* General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
||||
*/
|
||||
|
||||
FILE_LICENCE(GPL2_OR_LATER);
|
||||
|
||||
#include <ipxe/timer.h>
|
||||
|
||||
#include <linux_api.h>
|
||||
|
||||
/** @file
|
||||
*
|
||||
* iPXE timer API for linux
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* Delay for a fixed number of microseconds
|
||||
*
|
||||
* @v usecs Number of microseconds for which to delay
|
||||
*/
|
||||
static void linux_udelay(unsigned long usecs)
|
||||
{
|
||||
linux_usleep(usecs);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get number of ticks per second
|
||||
*
|
||||
* @ret ticks_per_sec Number of ticks per second
|
||||
*/
|
||||
static unsigned long linux_ticks_per_sec(void)
|
||||
{
|
||||
return 1000;
|
||||
}
|
||||
|
||||
/**
|
||||
* Get current system time in ticks
|
||||
*
|
||||
* linux doesn't provide an easy access to jiffies so implement it by measuring
|
||||
* the time since the first call to this function.
|
||||
*
|
||||
* @ret ticks Current time, in ticks
|
||||
*/
|
||||
static unsigned long linux_currticks(void)
|
||||
{
|
||||
static struct timeval start;
|
||||
static int initialized = 0;
|
||||
|
||||
if (! initialized) {
|
||||
linux_gettimeofday(&start, NULL);
|
||||
initialized = 1;
|
||||
}
|
||||
|
||||
struct timeval now;
|
||||
linux_gettimeofday(&now, NULL);
|
||||
|
||||
unsigned long ticks = (now.tv_sec - start.tv_sec) * linux_ticks_per_sec();
|
||||
ticks += (now.tv_usec - start.tv_usec) / (long)(1000000 / linux_ticks_per_sec());
|
||||
|
||||
return ticks;
|
||||
}
|
||||
|
||||
PROVIDE_TIMER(linux, udelay, linux_udelay);
|
||||
PROVIDE_TIMER(linux, currticks, linux_currticks);
|
||||
PROVIDE_TIMER(linux, ticks_per_sec, linux_ticks_per_sec);
|
Loading…
x
Reference in New Issue
Block a user