[U-Boot] [PATCH v2] sh: Update sh timer function
Nobuhiro Iwamatsu
iwamatsu.nobuhiro at renesas.com
Thu Nov 20 08:44:42 CET 2008
Change to write/readX fcuntion and fix timer bug.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu.nobuhiro at renesas.com>
---
cpu/sh2/Makefile | 2 +-
cpu/sh3/Makefile | 2 +-
cpu/sh3/time.c | 103 -----------------------------------
cpu/sh4/Makefile | 2 +-
cpu/sh4/time.c | 98 ---------------------------------
lib_sh/Makefile | 6 ++-
lib_sh/time.c | 83 ++++++++++++++++++++++------
cpu/sh2/time.c => lib_sh/time_sh2.c | 0
8 files changed, 74 insertions(+), 222 deletions(-)
delete mode 100644 cpu/sh3/time.c
delete mode 100644 cpu/sh4/time.c
rename cpu/sh2/time.c => lib_sh/time_sh2.c (100%)
diff --git a/cpu/sh2/Makefile b/cpu/sh2/Makefile
index 50f6720..b0fca96 100644
--- a/cpu/sh2/Makefile
+++ b/cpu/sh2/Makefile
@@ -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)
diff --git a/cpu/sh3/Makefile b/cpu/sh3/Makefile
index 587413d..35e8f51 100644
--- a/cpu/sh3/Makefile
+++ b/cpu/sh3/Makefile
@@ -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))
diff --git a/cpu/sh3/time.c b/cpu/sh3/time.c
deleted file mode 100644
index aab3659..0000000
--- a/cpu/sh3/time.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- * (C) Copyright 2007
- * Yoshihiro Shimoda <shimoda.yoshihiro at renesas.com>
- *
- * (C) Copyright 2007
- * Nobobuhiro Iwamatsu <iwamatsu at nigauri.org>
- *
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, wd at 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;
-}
diff --git a/cpu/sh4/Makefile b/cpu/sh4/Makefile
index d3c5eef..3c96a49 100644
--- a/cpu/sh4/Makefile
+++ b/cpu/sh4/Makefile
@@ -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))
diff --git a/cpu/sh4/time.c b/cpu/sh4/time.c
deleted file mode 100644
index 77e0ae2..0000000
--- a/cpu/sh4/time.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/*
- * (C) Copyright 2007
- * Nobobuhiro Iwamatsu <iwamatsu at nigauri.org>
- *
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, wd at 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;
-}
diff --git a/lib_sh/Makefile b/lib_sh/Makefile
index 4034381..f7c6479 100644
--- a/lib_sh/Makefile
+++ b/lib_sh/Makefile
@@ -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))
diff --git a/lib_sh/time.c b/lib_sh/time.c
index e637e95..4bed633 100644
--- a/lib_sh/time.c
+++ b/lib_sh/time.c
@@ -1,6 +1,9 @@
/*
- * Copyright (c) 2007
- * Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
+ * (C) Copyright 2007-2008
+ * Nobobuhiro Iwamatsu <iwamatsu at nigauri.org>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
@@ -23,50 +26,96 @@
#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);
+ return (0 - readl(TCNT0));
}
-void set_timer (unsigned long t)
+void udelay (unsigned long usec)
{
- *((volatile unsigned int *) TCNT0) = (0 - t);
+ unsigned int start = get_usec();
+ unsigned int end = start + (usec * clk_adj);
+
+ while (get_usec() < end)
+ continue;
}
-void reset_timer (void)
+unsigned long get_timer (unsigned long base)
{
- set_timer (0);
+ /* return msec */
+ return ((get_usec()/clk_adj)/1000) - base;
}
-void udelay (unsigned long usec)
+void set_timer (unsigned long t)
{
- unsigned int start = get_timer (0);
- unsigned int end = start + (usec * ((CONFIG_SYS_HZ + 500000) / 1000000));
+ writel((0 - t), TCNT0);
+}
- while (get_timer (0) < end)
- continue;
+void reset_timer (void)
+{
+ tmu_timer_stop(0);
+ set_timer (0);
+ tmu_timer_start(0);
}
unsigned long get_tbclk (void)
diff --git a/cpu/sh2/time.c b/lib_sh/time_sh2.c
similarity index 100%
rename from cpu/sh2/time.c
rename to lib_sh/time_sh2.c
--
1.5.6.5
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