x86: Remove ISR timer

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>

arch/x86/lib/Makefile

@@ -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

arch/x86/lib/timer.c

@@ -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;
-}