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| author | Andreas Bießmann <andreas.devel@googlemail.com> | 2010-11-30 09:45:06 +0000 |
|---|---|---|
| committer | Reinhard Meyer <u-boot@emk-elektronik.de> | 2010-12-07 22:08:07 +0100 |
| commit | a429db7e3ce6136f80f22584588247926ba60b05 (patch) | |
| tree | 77fdba6216ccf719b632b6aab0f3bb62701ac12c | |
| parent | 305bf489d1e7dd70f45720720ae0066fcce3acb1 (diff) | |
| download | u-boot-a429db7e3ce6136f80f22584588247926ba60b05.tar.gz u-boot-a429db7e3ce6136f80f22584588247926ba60b05.tar.xz u-boot-a429db7e3ce6136f80f22584588247926ba60b05.zip | |
arm920t/at91/timer: replace bss variables by gd
Reuse the gd->tbl value for timestamp and add gd->lastinc for 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.devel@googlemail.com>
| -rw-r--r-- | arch/arm/cpu/arm920t/at91/timer.c | 29 | ||||
| -rw-r--r-- | arch/arm/include/asm/global_data.h | 1 | ||||
| -rw-r--r-- | include/configs/at91rm9200ek.h | 2 |
3 files changed, 17 insertions, 15 deletions
diff --git a/arch/arm/cpu/arm920t/at91/timer.c b/arch/arm/cpu/arm920t/at91/timer.c index 91377d47a6..d9a024fc0e 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->lastinc = 0; + gd->tbl = 0; return 0; } @@ -86,7 +85,7 @@ ulong get_timer(ulong base) void set_timer(ulong t) { - timestamp = t; + gd->tbl = 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->lastinc = readl(&tc->tc[0].cv) & 0x0000ffff; + gd->tbl = 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->lastinc) { /* normal mode */ - timestamp += now - lastinc; + gd->tbl += now - gd->lastinc; } else { /* we have an overflow ... */ - timestamp += now + TIMER_LOAD_VAL - lastinc; + gd->tbl += now + TIMER_LOAD_VAL - gd->lastinc; } - lastinc = now; + gd->lastinc = now; - return timestamp; + return gd->tbl; } ulong get_timer_masked(void) diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index ada3fbb641..e459a5dc94 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -60,6 +60,7 @@ typedef struct global_data { unsigned long tbl; unsigned long tbu; unsigned long long timer_reset_value; + unsigned long lastinc; #endif unsigned long relocaddr; /* Start address of U-Boot in RAM */ phys_size_t ram_size; /* RAM size */ diff --git a/include/configs/at91rm9200ek.h b/include/configs/at91rm9200ek.h index df4413d813..810023a494 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 */ |