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sh: Update sh timer function

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Change to write/readX function and fix timer problem.

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro@renesas.com>
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
This commit is contained in:
Nobuhiro Iwamatsu 2008-11-20 16:44:42 +09:00 committed by Nobuhiro Iwamatsu
parent b81786cff4
commit e9d5f35497
8 changed files with 78 additions and 226 deletions
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2
cpu/sh2/Makefile
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@ -29,7 +29,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).a
START = start.o
OBJS = cpu.o interrupts.o watchdog.o time.o # cache.o
OBJS = cpu.o interrupts.o watchdog.o
all: .depend $(START) $(LIB)

2
cpu/sh3/Makefile
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@ -32,7 +32,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).a
SOBJS = start.o
COBJS = cpu.o interrupts.o watchdog.o time.o cache.o
COBJS = cpu.o interrupts.o watchdog.o cache.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))

103
cpu/sh3/time.c
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@ -1,103 +0,0 @@
/*
* (C) Copyright 2007
* Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
*
* (C) Copyright 2007
* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 <asm/processor.h>
#include <asm/io.h>
#define TMU_MAX_COUNTER (~0UL)
static void tmu_timer_start(unsigned int timer)
{
if (timer > 2)
return;
outb(inb(TSTR) | (1 << timer), TSTR);
}
static void tmu_timer_stop(unsigned int timer)
{
u8 val = inb(TSTR);
if (timer > 2)
return;
outb(val & ~(1 << timer), TSTR);
}
int timer_init(void)
{
/* Divide clock by 4 */
outw(0, TCR0);
tmu_timer_stop(0);
tmu_timer_start(0);
return 0;
}
/*
In theory we should return a true 64bit value (ie something that doesn't
overflow). However, we don't. Therefore if TMU runs at fastest rate of
6.75 MHz this value will wrap after u-boot has been running for approx
10 minutes.
*/
unsigned long long get_ticks(void)
{
return (0 - inl(TCNT0));
}
unsigned long get_timer(unsigned long base)
{
return ((0 - inl(TCNT0)) - base);
}
void set_timer(unsigned long t)
{
outl(0 - t, TCNT0);
}
void reset_timer(void)
{
tmu_timer_stop(0);
set_timer(0);
tmu_timer_start(0);
}
void udelay(unsigned long usec)
{
unsigned int start = get_timer(0);
unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000));
while (get_timer(0) < end)
continue;
}
unsigned long get_tbclk(void)
{
return CONFIG_SYS_HZ;
}

2
cpu/sh4/Makefile
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@ -29,7 +29,7 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).a
SOBJS = start.o
COBJS = cpu.o interrupts.o watchdog.o time.o cache.o
COBJS = cpu.o interrupts.o watchdog.o cache.o
SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c)
OBJS := $(addprefix $(obj),$(COBJS))

98
cpu/sh4/time.c
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@ -1,98 +0,0 @@
/*
* (C) Copyright 2007
* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 <asm/processor.h>
#define TMU_MAX_COUNTER (~0UL)
static void tmu_timer_start (unsigned int timer)
{
if (timer > 2)
return;
*((volatile unsigned char *) TSTR) |= (1 << timer);
}
static void tmu_timer_stop (unsigned int timer)
{
u8 val = *((volatile u8 *)TSTR);
if (timer > 2)
return;
*((volatile unsigned char *)TSTR) = val &~(1 << timer);
}
int timer_init (void)
{
/* Divide clock by 4 */
*(volatile u16 *)TCR0 = 0;
tmu_timer_stop(0);
tmu_timer_start(0);
return 0;
}
/*
In theory we should return a true 64bit value (ie something that doesn't
overflow). However, we don't. Therefore if TMU runs at fastest rate of
6.75 MHz this value will wrap after u-boot has been running for approx
10 minutes.
*/
unsigned long long get_ticks (void)
{
return (0 - *((volatile u32 *) TCNT0));
}
unsigned long get_timer (unsigned long base)
{
return ((0 - *((volatile u32 *) TCNT0)) - base);
}
void set_timer (unsigned long t)
{
*((volatile unsigned int *) TCNT0) = (0 - t);
}
void reset_timer (void)
{
tmu_timer_stop(0);
set_timer (0);
tmu_timer_start(0);
}
void udelay (unsigned long usec)
{
unsigned int start = get_timer (0);
unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000));
while (get_timer (0) < end)
continue;
}
unsigned long get_tbclk (void)
{
return CONFIG_SYS_HZ;
}

6
lib_sh/Makefile
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@ -26,7 +26,11 @@ SOBJS-y +=
COBJS-y += board.o
COBJS-y += bootm.o
# COBJS-y += time.o
ifeq ($(CONFIG_SH2),y)
COBJS-y += time_sh2.o
else
COBJS-y += time.o
endif
SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))

91
lib_sh/time.c
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@ -1,6 +1,9 @@
/*
* Copyright (c) 2007
* Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
* (C) Copyright 2007-2008
* Nobobuhiro Iwamatsu <iwamatsu@nigauri.org>
*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
@ -23,52 +26,98 @@
#include <common.h>
#include <asm/processor.h>
#include <asm/io.h>
#define TMU_MAX_COUNTER (~0UL)
static int clk_adj = 1;
static void tmu_timer_start (unsigned int timer)
{
if (timer > 2)
return;
writeb(readb(TSTR) | (1 << timer), TSTR);
}
*((volatile unsigned char *) TSTR0) |= (1 << timer);
static void tmu_timer_stop (unsigned int timer)
{
if (timer > 2)
return;
writeb(readb(TSTR) & ~(1 << timer), TSTR);
}
int timer_init (void)
{
*(volatile u16 *)TCR0 = 0;
/* Divide clock by TMU_CLK_DIVIDER */
u16 bit = 0;
switch( TMU_CLK_DIVIDER ){
case 4:
bit = 0;
break;
case 16:
bit = 1;
break;
case 64: bit = 2;
break;
case 256:
bit = 3;
break;
case 1024:
bit = 4;
break;
default:
bit = 0;
break;
}
writew(readw(TCR0) | bit, TCR0);
/* Clock adjustment calc */
clk_adj = (int)(1.0/((1.0/CONFIG_SYS_HZ)*1000000));
if (clk_adj < 1)
clk_adj = 1;
tmu_timer_stop(0);
tmu_timer_start(0);
tmu_timer_start (0);
return 0;
}
unsigned long long get_ticks (void)
{
return (0 - *((volatile unsigned int *) TCNT0));
return 0 - readl(TCNT0);
}
unsigned long get_timer (unsigned long base)
static unsigned long get_usec (void)
{
return ((0 - *((volatile unsigned int *) TCNT0)) - base);
}
void set_timer (unsigned long t)
{
*((volatile unsigned int *) TCNT0) = (0 - t);
}
void reset_timer (void)
{
set_timer (0);
return (0 - readl(TCNT0));
}
void udelay (unsigned long usec)
{
unsigned int start = get_timer (0);
unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000));
unsigned int start = get_usec();
unsigned int end = start + (usec * clk_adj);
while (get_timer (0) < end)
while (get_usec() < end)
continue;
}
unsigned long get_timer (unsigned long base)
{
/* return msec */
return ((get_usec()/clk_adj)/1000) - base;
}
void set_timer (unsigned long t)
{
writel((0 - t), TCNT0);
}
void reset_timer (void)
{
tmu_timer_stop(0);
set_timer (0);
tmu_timer_start(0);
}
unsigned long get_tbclk (void)
{
return CONFIG_SYS_HZ;

0
cpu/sh2/time.c → lib_sh/time_sh2.c
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