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x86: Remove ISR timer

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This is no longer used since we prefer the more accurate TSC timer, so
remove the dead code.

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Graeme Russ <graeme.russ@gmail.com>
This commit is contained in:
Simon Glass 2013-04-17 16:13:38 +00:00
parent 29756d4447
commit f9083bbe78
2 changed files with 0 additions and 119 deletions
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1
arch/x86/lib/Makefile
View File

@ -36,7 +36,6 @@ COBJS-$(CONFIG_PCI) += pci_type1.o
COBJS-y += relocate.o
COBJS-y += physmem.o
COBJS-y += string.o
COBJS-$(CONFIG_SYS_X86_ISR_TIMER) += timer.o
COBJS-$(CONFIG_SYS_X86_TSC_TIMER) += tsc_timer.o
COBJS-$(CONFIG_VIDEO_VGA) += video.o
COBJS-$(CONFIG_CMD_ZBOOT) += zimage.o

118
arch/x86/lib/timer.c
View File

@ -1,118 +0,0 @@
/*
* (C) Copyright 2008,2009
* Graeme Russ, <graeme.russ@gmail.com>
*
* (C) Copyright 2002
* Daniel Engström, Omicron Ceti AB, <daniel@omicron.se>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 (at your option) 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <malloc.h>
#include <asm/io.h>
#include <asm/i8254.h>
#include <asm/ibmpc.h>
DECLARE_GLOBAL_DATA_PTR;
struct timer_isr_function {
struct timer_isr_function *next;
timer_fnc_t *isr_func;
};
static struct timer_isr_function *first_timer_isr;
static unsigned long system_ticks;
/*
* register_timer_isr() allows multiple architecture and board specific
* functions to be called every millisecond. Keep the execution time of
* each function as low as possible
*/
int register_timer_isr(timer_fnc_t *isr_func)
{
struct timer_isr_function *new_func;
struct timer_isr_function *temp;
int flag;
new_func = malloc(sizeof(struct timer_isr_function));
if (new_func == NULL)
return 1;
new_func->isr_func = isr_func;
new_func->next = NULL;
/*
* Don't allow timer interrupts while the
* linked list is being modified
*/
flag = disable_interrupts();
if (first_timer_isr == NULL) {
first_timer_isr = new_func;
} else {
temp = first_timer_isr;
while (temp->next != NULL)
temp = temp->next;
temp->next = new_func;
}
if (flag)
enable_interrupts();
return 0;
}
/*
* timer_isr() MUST be the registered interrupt handler for
*/
void timer_isr(void *unused)
{
struct timer_isr_function *temp = first_timer_isr;
system_ticks++;
/* Execute each registered function */
while (temp != NULL) {
temp->isr_func();
temp = temp->next;
}
}
ulong get_timer(ulong base)
{
return system_ticks - base;
}
void timer_set_tsc_base(uint64_t new_base)
{
gd->arch.tsc_base = new_base;
}
uint64_t timer_get_tsc(void)
{
uint64_t time_now;
time_now = rdtsc();
if (!gd->arch.tsc_base)
gd->arch.tsc_base = time_now;
return time_now - gd->arch.tsc_base;
}