* [U-Boot] [PATCH][iMX31] Change to use "do_div" macro
@ 2008-10-20 7:06 Tomohiro Masubuchi
2008-10-20 11:21 ` Jean-Christophe PLAGNIOL-VILLARD
0 siblings, 1 reply; 3+ messages in thread
From: Tomohiro Masubuchi @ 2008-10-20 7:06 UTC (permalink / raw)
To: u-boot
I tryed to build u-boot by Sourcery G++ Lite 2008q3-41 for ARM GNU/Linux.
But, it was failed with some link error of divide function.
Thus, I changed to use the "do_div" macro to calculate the dividing.
In my environment, the "next" branch with this patch worked correctly.
Signed-off-by: Tomohiro Masubuchi <tomohiro_masubuchi@tripeaks.co.jp>
----
Change to use the "do_div" macro.
cpu/arm1136/mx31/interrupts.c | 36 ++++++++++++++++++++++++++++++------
1 files changed, 30 insertions(+), 6 deletions(-)
diff --git a/cpu/arm1136/mx31/interrupts.c b/cpu/arm1136/mx31/interrupts.c
index b36c58c..807e791 100644
--- a/cpu/arm1136/mx31/interrupts.c
+++ b/cpu/arm1136/mx31/interrupts.c
@@ -23,6 +23,7 @@
#include <common.h>
#include <asm/arch/mx31-regs.h>
+#include <div64.h>
#define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
@@ -41,17 +42,40 @@
/* "time" is measured in 1 / CONFIG_SYS_HZ seconds, "tick" is internal timer period */
#ifdef CONFIG_MX31_TIMER_HIGH_PRECISION
/* ~0.4% error - measured with stop-watch on 100s boot-delay */
-#define TICK_TO_TIME(t) ((t) * CONFIG_SYS_HZ / CONFIG_MX31_CLK32)
-#define TIME_TO_TICK(t) ((unsigned long long)(t) * CONFIG_MX31_CLK32 / CONFIG_SYS_HZ)
-#define US_TO_TICK(t) (((unsigned long long)(t) * CONFIG_MX31_CLK32 + \
- 999999) / 1000000)
+#define TICK_TO_TIME(t) ({ \
+ unsigned long long tmp = (t); \
+ t *= CONFIG_SYS_HZ; \
+ do_div(tmp, CONFIG_MX31_CLK32); \
+ tmp; \
+ })
+#define TIME_TO_TICK(t) ({ \
+ unsigned long long tmp = (t); \
+ tmp *= CONFIG_MX31_CLK32; \
+ do_div(tmp, CONFIG_SYS_HZ); \
+ tmp; \
+ })
+#define US_TO_TICK(t) ({ \
+ unsigned long long tmp = (t); \
+ tmp = tmp * CONFIG_MX31_CLK32 + 999999; \
+ do_div(tmp, 1000000); \
+ tmp; \
+ })
#else
/* ~2% error */
#define TICK_PER_TIME ((CONFIG_MX31_CLK32 + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
#define US_PER_TICK (1000000 / CONFIG_MX31_CLK32)
-#define TICK_TO_TIME(t) ((t) / TICK_PER_TIME)
+#define TICK_TO_TIME(t) ({ \
+ unsigned long long tmp = (t); \
+ do_div(tmp, TICK_PER_TIME); \
+ tmp; \
+ })
#define TIME_TO_TICK(t) ((unsigned long long)(t) * TICK_PER_TIME)
-#define US_TO_TICK(t) (((t) + US_PER_TICK - 1) / US_PER_TICK)
+#define US_TO_TICK(t) ({ \
+ unsigned long long tmp = (t); \
+ tmp += US_PER_TICK - 1; \
+ do_div(tmp, US_PER_TICK); \
+ tmp; \
+ })
#endif
static ulong timestamp;
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [U-Boot] [PATCH][iMX31] Change to use "do_div" macro
2008-10-20 7:06 [U-Boot] [PATCH][iMX31] Change to use "do_div" macro Tomohiro Masubuchi
@ 2008-10-20 11:21 ` Jean-Christophe PLAGNIOL-VILLARD
2008-10-21 4:17 ` [U-Boot] [PATCHv2][iMX31] " Tomohiro Masubuchi
0 siblings, 1 reply; 3+ messages in thread
From: Jean-Christophe PLAGNIOL-VILLARD @ 2008-10-20 11:21 UTC (permalink / raw)
To: u-boot
On 16:06 Mon 20 Oct , Tomohiro Masubuchi wrote:
> I tryed to build u-boot by Sourcery G++ Lite 2008q3-41 for ARM GNU/Linux.
> But, it was failed with some link error of divide function.
> Thus, I changed to use the "do_div" macro to calculate the dividing.
>
> In my environment, the "next" branch with this patch worked correctly.
>
> Signed-off-by: Tomohiro Masubuchi <tomohiro_masubuchi@tripeaks.co.jp>
> ----
> Change to use the "do_div" macro.
>
> cpu/arm1136/mx31/interrupts.c | 36 ++++++++++++++++++++++++++++++------
> 1 files changed, 30 insertions(+), 6 deletions(-)
>
> diff --git a/cpu/arm1136/mx31/interrupts.c b/cpu/arm1136/mx31/interrupts.c
> index b36c58c..807e791 100644
> --- a/cpu/arm1136/mx31/interrupts.c
> +++ b/cpu/arm1136/mx31/interrupts.c
> @@ -23,6 +23,7 @@
>
> #include <common.h>
> #include <asm/arch/mx31-regs.h>
> +#include <div64.h>
>
> #define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
>
> @@ -41,17 +42,40 @@
> /* "time" is measured in 1 / CONFIG_SYS_HZ seconds, "tick" is internal timer period */
> #ifdef CONFIG_MX31_TIMER_HIGH_PRECISION
> /* ~0.4% error - measured with stop-watch on 100s boot-delay */
> -#define TICK_TO_TIME(t) ((t) * CONFIG_SYS_HZ / CONFIG_MX31_CLK32)
> -#define TIME_TO_TICK(t) ((unsigned long long)(t) * CONFIG_MX31_CLK32 / CONFIG_SYS_HZ)
> -#define US_TO_TICK(t) (((unsigned long long)(t) * CONFIG_MX31_CLK32 + \
> - 999999) / 1000000)
> +#define TICK_TO_TIME(t) ({ \
> + unsigned long long tmp = (t); \
> + t *= CONFIG_SYS_HZ; \
> + do_div(tmp, CONFIG_MX31_CLK32); \
> + tmp; \
> + })
IMHO implement it as inline will be better : simple to maintain and to read
Best Regards,
J.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] [PATCHv2][iMX31] Change to use "do_div" macro
2008-10-20 11:21 ` Jean-Christophe PLAGNIOL-VILLARD
@ 2008-10-21 4:17 ` Tomohiro Masubuchi
0 siblings, 0 replies; 3+ messages in thread
From: Tomohiro Masubuchi @ 2008-10-21 4:17 UTC (permalink / raw)
To: u-boot
Hi,
I've fixed which Jean-Christophe pointed out.
Regards,
Tomohiro
Signed-off-by: Tomohiro Masubuchi <tomohiro_masubuchi@tripeaks.co.jp>
----
Change to use the "do_div" macro.
cpu/arm1136/mx31/interrupts.c | 58 +++++++++++++++++++++++++++++++---------
1 files changed, 45 insertions(+), 13 deletions(-)
diff --git a/cpu/arm1136/mx31/interrupts.c b/cpu/arm1136/mx31/interrupts.c
index b36c58c..ab7202f 100644
--- a/cpu/arm1136/mx31/interrupts.c
+++ b/cpu/arm1136/mx31/interrupts.c
@@ -23,6 +23,7 @@
#include <common.h>
#include <asm/arch/mx31-regs.h>
+#include <div64.h>
#define TIMER_BASE 0x53f90000 /* General purpose timer 1 */
@@ -38,24 +39,55 @@
#define GPTCR_CLKSOURCE_32 (4 << 6) /* Clock source */
#define GPTCR_TEN 1 /* Timer enable */
+static ulong timestamp;
+static ulong lastinc;
+
/* "time" is measured in 1 / CONFIG_SYS_HZ seconds, "tick" is internal timer period */
#ifdef CONFIG_MX31_TIMER_HIGH_PRECISION
/* ~0.4% error - measured with stop-watch on 100s boot-delay */
-#define TICK_TO_TIME(t) ((t) * CONFIG_SYS_HZ / CONFIG_MX31_CLK32)
-#define TIME_TO_TICK(t) ((unsigned long long)(t) * CONFIG_MX31_CLK32 / CONFIG_SYS_HZ)
-#define US_TO_TICK(t) (((unsigned long long)(t) * CONFIG_MX31_CLK32 + \
- 999999) / 1000000)
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+ tick *= CONFIG_SYS_HZ;
+ do_div(tick, CONFIG_MX31_CLK32);
+ return tick;
+}
+
+static inline unsigned long long time_to_tick(unsigned long long time)
+{
+ time *= CONFIG_MX31_CLK32;
+ do_div(time, CONFIG_SYS_HZ);
+ return time;
+}
+
+static inline unsigned long long us_to_tick(unsigned long long us)
+{
+ us = us * CONFIG_MX31_CLK32 + 999999;
+ do_div(us, 1000000);
+ return us;
+}
#else
/* ~2% error */
#define TICK_PER_TIME ((CONFIG_MX31_CLK32 + CONFIG_SYS_HZ / 2) / CONFIG_SYS_HZ)
#define US_PER_TICK (1000000 / CONFIG_MX31_CLK32)
-#define TICK_TO_TIME(t) ((t) / TICK_PER_TIME)
-#define TIME_TO_TICK(t) ((unsigned long long)(t) * TICK_PER_TIME)
-#define US_TO_TICK(t) (((t) + US_PER_TICK - 1) / US_PER_TICK)
-#endif
-static ulong timestamp;
-static ulong lastinc;
+static inline unsigned long long tick_to_time(unsigned long long tick)
+{
+ do_div(tick, TICK_PER_TIME);
+ return tick;
+}
+
+static inline unsigned long long time_to_tick(unsigned long long time)
+{
+ return time * TICK_PER_TIME;
+}
+
+static inline unsigned long long us_to_tick(unsigned long long us)
+{
+ us += US_PER_TICK - 1;
+ do_div(us, US_PER_TICK);
+ return us;
+}
+#endif
/* nothing really to do with interrupts, just starts up a counter. */
/* The 32768Hz 32-bit timer overruns in 131072 seconds */
@@ -107,7 +139,7 @@ ulong get_timer_masked (void)
* 5 * 10^9 days... and get_ticks() * CONFIG_SYS_HZ wraps in
* 5 * 10^6 days - long enough.
*/
- return TICK_TO_TIME(get_ticks());
+ return tick_to_time(get_ticks());
}
ulong get_timer (ulong base)
@@ -117,7 +149,7 @@ ulong get_timer (ulong base)
void set_timer (ulong t)
{
- timestamp = TIME_TO_TICK(t);
+ timestamp = time_to_tick(t);
}
/* delay x useconds AND perserve advance timstamp value */
@@ -126,7 +158,7 @@ void udelay (unsigned long usec)
unsigned long long tmp;
ulong tmo;
- tmo = US_TO_TICK(usec);
+ tmo = us_to_tick(usec);
tmp = get_ticks() + tmo; /* get current timestamp */
while (get_ticks() < tmp) /* loop till event */
^ permalink raw reply related [flat|nested] 3+ messages in thread
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2008-10-20 7:06 [U-Boot] [PATCH][iMX31] Change to use "do_div" macro Tomohiro Masubuchi
2008-10-20 11:21 ` Jean-Christophe PLAGNIOL-VILLARD
2008-10-21 4:17 ` [U-Boot] [PATCHv2][iMX31] " Tomohiro Masubuchi
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