diff options
Diffstat (limited to 'qemu/roms/ipxe/src/interface/linux/linux_timer.c')
-rw-r--r-- | qemu/roms/ipxe/src/interface/linux/linux_timer.c | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/qemu/roms/ipxe/src/interface/linux/linux_timer.c b/qemu/roms/ipxe/src/interface/linux/linux_timer.c deleted file mode 100644 index 7a994517b..000000000 --- a/qemu/roms/ipxe/src/interface/linux/linux_timer.c +++ /dev/null @@ -1,87 +0,0 @@ -/* - * Copyright (C) 2010 Piotr JaroszyĆski <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 <stddef.h> -#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. - * - * Since this function is used to seed the (non-cryptographic) random - * number generator, we round the start time down to the nearest whole - * second. This minimises the chances of generating identical RNG - * sequences (and hence identical TCP port numbers, etc) on - * consecutive invocations of iPXE. - * - * @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 / (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); |