[U-Boot] [PATCH] S3C64XX: timer: replace bss variable by gd
seedshope
bocui107 at gmail.com
Tue Jan 4 15:56:24 CET 2011
On 01/04/2011 10:46 PM, seedshope wrote:
> On 01/04/2011 04:14 PM, Minkyu Kang wrote:
>> Use the global data instead of bss variable, replace as follow.
>> timer_load_val -> timer_rate_hz
>> timestamp -> timer_reset_value
>> lastdec -> lastinc
> I have already test the patch on s3c6410 . It is work perfect.
Before I am not use the patch, When I use the command "nand read",
The some information will generate. as following:
raise: Signal # 8 caught
I also trace the timer.c, But I can't resolve it. As if after the first
initial timer,
I guess the bss will be clear.
Now It is ok after patch this patch.
Thanks,
seedshope
>
> Thanks,
> seedshope
>> Signed-off-by: Minkyu Kang<mk7.kang at samsung.com>
>> Signed-off-by: Darius Augulis<augulis.darius at gmail.com>
>> cc: Heiko Schocher<hs at denx.de>
>> ---
>> arch/arm/cpu/arm1176/s3c64xx/timer.c | 40
>> +++++++++++++--------------------
>> 1 files changed, 16 insertions(+), 24 deletions(-)
>>
>> diff --git a/arch/arm/cpu/arm1176/s3c64xx/timer.c
>> b/arch/arm/cpu/arm1176/s3c64xx/timer.c
>> index 9768319..c1280f2 100644
>> --- a/arch/arm/cpu/arm1176/s3c64xx/timer.c
>> +++ b/arch/arm/cpu/arm1176/s3c64xx/timer.c
>> @@ -43,7 +43,7 @@
>> #include<asm/arch/s3c6400.h>
>> #include<div64.h>
>>
>> -static ulong timer_load_val;
>> +DECLARE_GLOBAL_DATA_PTR;
>>
>> #define PRESCALER 167
>>
>> @@ -60,12 +60,6 @@ static inline ulong read_timer(void)
>> return timers->TCNTO4;
>> }
>>
>> -/* Internal tick units */
>> -/* Last decremneter snapshot */
>> -static unsigned long lastdec;
>> -/* Monotonic incrementing timer */
>> -static unsigned long long timestamp;
>> -
>> int timer_init(void)
>> {
>> s3c64xx_timers *const timers = s3c64xx_get_base_timers();
>> @@ -83,20 +77,18 @@ int timer_init(void)
>> * the prescaler automatically for other PCLK frequencies.
>> */
>> timers->TCFG0 = PRESCALER<< 8;
>> - if (timer_load_val == 0) {
>> - timer_load_val = get_PCLK() / PRESCALER * (100 / 4); /* 100s */
>> - timers->TCFG1 = (timers->TCFG1& ~0xf0000) | 0x20000;
>> - }
>> + gd->timer_rate_hz = get_PCLK() / PRESCALER * (100 / 4); /* 100s */
>> + timers->TCFG1 = (timers->TCFG1& ~0xf0000) | 0x20000;
>>
>> /* load value for 10 ms timeout */
>> - lastdec = timers->TCNTB4 = timer_load_val;
>> + gd->lastinc = timers->TCNTB4 = gd->timer_rate_hz;
>> /* auto load, manual update of Timer 4 */
>> timers->TCON = (timers->TCON& ~0x00700000) | TCON_4_AUTO |
>> TCON_4_UPDATE;
>>
>> /* auto load, start Timer 4 */
>> timers->TCON = (timers->TCON& ~0x00700000) | TCON_4_AUTO |
>> COUNT_4_ON;
>> - timestamp = 0;
>> + gd->timer_reset_value = 0;
>>
>> return 0;
>> }
>> @@ -113,16 +105,16 @@ unsigned long long get_ticks(void)
>> {
>> ulong now = read_timer();
>>
>> - if (lastdec>= now) {
>> + if (gd->lastinc>= now) {
>> /* normal mode */
>> - timestamp += lastdec - now;
>> + gd->timer_reset_value += gd->lastinc - now;
>> } else {
>> /* we have an overflow ... */
>> - timestamp += lastdec + timer_load_val - now;
>> + gd->timer_reset_value += gd->lastinc + gd->timer_rate_hz - now;
>> }
>> - lastdec = now;
>> + gd->lastinc = now;
>>
>> - return timestamp;
>> + return gd->timer_reset_value;
>> }
>>
>> /*
>> @@ -132,14 +124,14 @@ unsigned long long get_ticks(void)
>> ulong get_tbclk(void)
>> {
>> /* We overrun in 100s */
>> - return (ulong)(timer_load_val / 100);
>> + return (ulong)(gd->timer_rate_hz / 100);
>> }
>>
>> void reset_timer_masked(void)
>> {
>> /* reset time */
>> - lastdec = read_timer();
>> - timestamp = 0;
>> + gd->lastinc = read_timer();
>> + gd->timer_reset_value = 0;
>> }
>>
>> void reset_timer(void)
>> @@ -150,7 +142,7 @@ void reset_timer(void)
>> ulong get_timer_masked(void)
>> {
>> unsigned long long res = get_ticks();
>> - do_div (res, (timer_load_val / (100 * CONFIG_SYS_HZ)));
>> + do_div(res, (gd->timer_rate_hz / (100 * CONFIG_SYS_HZ)));
>> return res;
>> }
>>
>> @@ -161,7 +153,7 @@ ulong get_timer(ulong base)
>>
>> void set_timer(ulong t)
>> {
>> - timestamp = t * (timer_load_val / (100 * CONFIG_SYS_HZ));
>> + gd->timer_reset_value = t * (gd->timer_rate_hz / (100 *
>> CONFIG_SYS_HZ));
>> }
>>
>> void __udelay(unsigned long usec)
>> @@ -170,7 +162,7 @@ void __udelay(unsigned long usec)
>> ulong tmo;
>>
>> tmo = (usec + 9) / 10;
>> - tmp = get_ticks() + tmo; /* get current timestamp */
>> + tmp = get_ticks() + tmo; /* get current timer_reset_value */
>>
>> while (get_ticks()< tmp)/* loop till event */
>> /*NOP*/;
>
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