Reuse the gd->tbl/tbu values for timestamp/lastinc bss values in
arm920t/at91/timer driver.
The usage of bss values in driver before initialisation of bss is
forbidden. In that special case some data in .rel.dyn gets corrupted by
the arm920t/at91/timer driver.
Signed-off-by: Andreas Bießmann <andreas.de...@googlemail.com>
---
arch/arm/cpu/arm920t/at91/timer.c | 29 ++++++++++++++---------------
include/configs/at91rm9200ek.h | 2 ++
2 files changed, 16 insertions(+), 15 deletions(-)
diff --git a/arch/arm/cpu/arm920t/at91/timer.c
b/arch/arm/cpu/arm920t/at91/timer.c
index 91377d4..2a7cd9b 100644
--- a/arch/arm/cpu/arm920t/at91/timer.c
+++ b/arch/arm/cpu/arm920t/at91/timer.c
@@ -32,17 +32,16 @@
#include <common.h>
-#include <asm/io.h>
-#include <asm/hardware.h>
+#include <asm/arch/io.h>
+#include <asm/arch/hardware.h>
#include <asm/arch/at91_tc.h>
#include <asm/arch/at91_pmc.h>
+DECLARE_GLOBAL_DATA_PTR;
+
/* the number of clocks per CONFIG_SYS_HZ */
#define TIMER_LOAD_VAL (CONFIG_SYS_HZ_CLOCK/CONFIG_SYS_HZ)
-static u32 timestamp;
-static u32 lastinc;
-
int timer_init(void)
{
at91_tc_t *tc = (at91_tc_t *) AT91_TC_BASE;
@@ -64,8 +63,8 @@ int timer_init(void)
writel(TIMER_LOAD_VAL, &tc->tc[0].rc);
writel(AT91_TC_CCR_SWTRG | AT91_TC_CCR_CLKEN, &tc->tc[0].ccr);
- lastinc = 0;
- timestamp = 0;
+ gd->tbu = 0;
+ gd->tbl = 0;
return 0;
}
@@ -86,7 +85,7 @@ ulong get_timer(ulong base)
void set_timer(ulong t)
{
- timestamp = t;
+ gd->tbu = t;
}
void __udelay(unsigned long usec)
@@ -98,8 +97,8 @@ void reset_timer_masked(void)
{
/* reset time */
at91_tc_t *tc = (at91_tc_t *) AT91_TC_BASE;
- lastinc = readl(&tc->tc[0].cv) & 0x0000ffff;
- timestamp = 0;
+ gd->tbl = readl(&tc->tc[0].cv) & 0x0000ffff;
+ gd->tbu = 0;
}
ulong get_timer_raw(void)
@@ -109,16 +108,16 @@ ulong get_timer_raw(void)
now = readl(&tc->tc[0].cv) & 0x0000ffff;
- if (now >= lastinc) {
+ if (now >= gd->tbl) {
/* normal mode */
- timestamp += now - lastinc;
+ gd->tbu += now - gd->tbl;
} else {
/* we have an overflow ... */
- timestamp += now + TIMER_LOAD_VAL - lastinc;
+ gd->tbu += now + TIMER_LOAD_VAL - gd->tbl;
}
- lastinc = now;
+ gd->tbl = now;
- return timestamp;
+ return gd->tbu;
}
ulong get_timer_masked(void)
diff --git a/include/configs/at91rm9200ek.h b/include/configs/at91rm9200ek.h
index ba2e9d3..57e17e9 100644
--- a/include/configs/at91rm9200ek.h
+++ b/include/configs/at91rm9200ek.h
@@ -71,6 +71,8 @@
#define CONFIG_SETUP_MEMORY_TAGS
#define CONFIG_INITRD_TAG
+#define CONFIG_AT91FAMILY
+
/*
* Memory Configuration
*/
--
1.7.3.2
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