Hello
The attached patch fixes the s3c24x0 timer code to work with the ARM
relocation feature.
Dave
Signed-off-by: David Mueller <d.muel...@elsoft.ch>
diff --git a/arch/arm/cpu/arm920t/s3c24x0/timer.c
b/arch/arm/cpu/arm920t/s3c24x0/timer.c
index 8cf9ff6..2903ba7 100644
--- a/arch/arm/cpu/arm920t/s3c24x0/timer.c
+++ b/arch/arm/cpu/arm920t/s3c24x0/timer.c
@@ -35,8 +35,7 @@
#include <asm/io.h>
#include <asm/arch/s3c24x0_cpu.h>
-int timer_load_val = 0;
-static ulong timer_clk;
+DECLARE_GLOBAL_DATA_PTR;
/* macro to read the 16 bit timer */
static inline ulong READ_TIMER(void)
@@ -46,9 +45,6 @@ static inline ulong READ_TIMER(void)
return readl(&timers->tcnto4) & 0xffff;
}
-static ulong timestamp;
-static ulong lastdec;
-
int timer_init(void)
{
struct s3c24x0_timers *timers = s3c24x0_get_base_timers();
@@ -57,27 +53,27 @@ int timer_init(void)
/* use PWM Timer 4 because it has no output */
/* prescaler for Timer 4 is 16 */
writel(0x0f00, &timers->tcfg0);
- if (timer_load_val == 0) {
+ if (gd->timer_load_val == 0) {
/*
* for 10 ms clock period @ PCLK with 4 bit divider = 1/2
* (default) and prescaler = 16. Should be 10390
* @33.25MHz and 15625 @ 50 MHz
*/
- timer_load_val = get_PCLK() / (2 * 16 * 100);
- timer_clk = get_PCLK() / (2 * 16);
+ gd->timer_load_val = get_PCLK() / (2 * 16 * 100);
+ gd->timer_clk = get_PCLK() / (2 * 16);
}
/* load value for 10 ms timeout */
- lastdec = timer_load_val;
- writel(timer_load_val, &timers->tcntb4);
+ gd->lastdec = gd->timer_load_val;
+ writel(gd->timer_load_val, &timers->tcntb4);
/* auto load, manual update of timer 4 */
tmr = (readl(&timers->tcon) & ~0x0700000) | 0x0600000;
writel(tmr, &timers->tcon);
/* auto load, start timer 4 */
tmr = (tmr & ~0x0700000) | 0x0500000;
writel(tmr, &timers->tcon);
- timestamp = 0;
+ gd->timestamp = 0;
- return (0);
+ return 0;
}
/*
@@ -96,7 +92,7 @@ ulong get_timer(ulong base)
void set_timer(ulong t)
{
- timestamp = t;
+ gd->timestamp = t;
}
void __udelay (unsigned long usec)
@@ -105,7 +101,7 @@ void __udelay (unsigned long usec)
ulong start = get_ticks();
tmo = usec / 1000;
- tmo *= (timer_load_val * 100);
+ tmo *= (gd->timer_load_val * 100);
tmo /= 1000;
while ((ulong) (get_ticks() - start) < tmo)
@@ -115,15 +111,15 @@ void __udelay (unsigned long usec)
void reset_timer_masked(void)
{
/* reset time */
- lastdec = READ_TIMER();
- timestamp = 0;
+ gd->lastdec = READ_TIMER();
+ gd->timestamp = 0;
}
ulong get_timer_masked(void)
{
ulong tmr = get_ticks();
- return tmr / (timer_clk / CONFIG_SYS_HZ);
+ return tmr / (gd->timer_clk / CONFIG_SYS_HZ);
}
void udelay_masked(unsigned long usec)
@@ -134,10 +130,10 @@ void udelay_masked(unsigned long usec)
if (usec >= 1000) {
tmo = usec / 1000;
- tmo *= (timer_load_val * 100);
+ tmo *= (gd->timer_load_val * 100);
tmo /= 1000;
} else {
- tmo = usec * (timer_load_val * 100);
+ tmo = usec * (gd->timer_load_val * 100);
tmo /= (1000 * 1000);
}
@@ -157,16 +153,16 @@ unsigned long long get_ticks(void)
{
ulong now = READ_TIMER();
- if (lastdec >= now) {
+ if (gd->lastdec >= now) {
/* normal mode */
- timestamp += lastdec - now;
+ gd->timestamp += gd->lastdec - now;
} else {
/* we have an overflow ... */
- timestamp += lastdec + timer_load_val - now;
+ gd->timestamp += gd->lastdec + gd->timer_load_val - now;
}
- lastdec = now;
+ gd->lastdec = now;
- return timestamp;
+ return gd->timestamp;
}
/*
@@ -178,7 +174,7 @@ ulong get_tbclk(void)
ulong tbclk;
#if defined(CONFIG_SMDK2400) || defined(CONFIG_TRAB)
- tbclk = timer_load_val * 100;
+ tbclk = gd->timer_load_val * 100;
#elif defined(CONFIG_SBC2410X) || \
defined(CONFIG_SMDK2410) || \
defined(CONFIG_S3C2440) || \
diff --git a/arch/arm/include/asm/global_data.h
b/arch/arm/include/asm/global_data.h
index ada3fbb..799943c 100644
--- a/arch/arm/include/asm/global_data.h
+++ b/arch/arm/include/asm/global_data.h
@@ -61,6 +61,13 @@ typedef struct global_data {
unsigned long tbu;
unsigned long long timer_reset_value;
#endif
+#ifdef CONFIG_S3C24X0
+ /* "static data" needed by s3c24x0 timer.c */
+ unsigned long timer_load_val;
+ unsigned long timer_clk;
+ unsigned long timestamp;
+ unsigned long lastdec;
+#endif
unsigned long relocaddr; /* Start address of U-Boot in RAM */
phys_size_t ram_size; /* RAM size */
unsigned long mon_len; /* monitor len */
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