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authorWolfgang Denk <wd@denx.de>2010-10-11 10:24:22 +0200
committerWolfgang Denk <wd@denx.de>2010-10-11 10:24:22 +0200
commitddf71e4cfffb4792445d3473cfc9326d07e6557c (patch)
tree304de15eacb23a55a1eae6e2fc3c9d3726d8290f /arch/arm/cpu
parente67f46286440a53fb1d693152667ea3b1a6b3060 (diff)
parentc8f6d84d10d324e0b0462e09629f210b046e1018 (diff)
downloadu-boot-linaro-stable-ddf71e4cfffb4792445d3473cfc9326d07e6557c.tar.gz
Merge branch 'at91' of git://git.denx.de/u-boot-atmel
Diffstat (limited to 'arch/arm/cpu')
-rw-r--r--arch/arm/cpu/arm926ejs/at91/cpu.c48
1 files changed, 28 insertions, 20 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/cpu.c b/arch/arm/cpu/arm926ejs/at91/cpu.c
index 141a7d1ec..5e30f1dcc 100644
--- a/arch/arm/cpu/arm926ejs/at91/cpu.c
+++ b/arch/arm/cpu/arm926ejs/at91/cpu.c
@@ -1,4 +1,6 @@
/*
+ * (C) Copyright 2010
+ * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
* (C) Copyright 2009
* Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
@@ -22,12 +24,11 @@
*/
#include <common.h>
-#ifdef CONFIG_AT91_LEGACY
-#warning Your board is using legacy SoC access. Please update!
-#endif
#include <asm/arch/hardware.h>
#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_pit.h>
+#include <asm/arch/at91_gpbr.h>
#include <asm/arch/clk.h>
#include <asm/arch/io.h>
@@ -35,18 +36,26 @@
#define CONFIG_SYS_AT91_MAIN_CLOCK 0
#endif
-/*
- * The at91sam9260 has 4 GPBR (0-3), we'll use the last one, nr 3,
- * to keep track of the bootcount.
- */
-#define AT91_GPBR_BOOTCOUNT_REGISTER 3
-#define AT91_BOOTCOUNT_ADDRESS (AT91_GPBR + 4*AT91_GPBR_BOOTCOUNT_REGISTER)
-
int arch_cpu_init(void)
{
return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
}
+void arch_preboot_os(void)
+{
+ ulong cpiv;
+ at91_pit_t *pit = (at91_pit_t *) AT91_PIT_BASE;
+
+ cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
+
+ /*
+ * Disable PITC
+ * Add 0x1000 to current counter to stop it faster
+ * without waiting for wrapping back to 0
+ */
+ writel(cpiv + 0x1000, &pit->mr);
+}
+
#if defined(CONFIG_DISPLAY_CPUINFO)
int print_cpuinfo(void)
{
@@ -66,27 +75,26 @@ int print_cpuinfo(void)
#ifdef CONFIG_BOOTCOUNT_LIMIT
/*
- * Just as the mpc5xxx, we combine the BOOTCOUNT_MAGIC and boocount
- * in one 32-bit register. This is done, as the AT91SAM9260 only has
- * 4 GPBR.
+ * We combine the BOOTCOUNT_MAGIC and bootcount in one 32-bit register.
+ * This is done so we need to use only one of the four GPBR registers.
*/
void bootcount_store (ulong a)
{
- volatile ulong *save_addr =
- (volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
+ at91_gpbr_t *gpbr = (at91_gpbr_t *) AT91_GPR_BASE;
- *save_addr = (BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff);
+ writel((BOOTCOUNT_MAGIC & 0xffff0000) | (a & 0x0000ffff),
+ &gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
}
ulong bootcount_load (void)
{
- volatile ulong *save_addr =
- (volatile ulong *)(AT91_BASE_SYS + AT91_BOOTCOUNT_ADDRESS);
+ at91_gpbr_t *gpbr = (at91_gpbr_t *) AT91_GPR_BASE;
- if ((*save_addr & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
+ ulong val = readl(&gpbr->reg[AT91_GPBR_INDEX_BOOTCOUNT]);
+ if ((val & 0xffff0000) != (BOOTCOUNT_MAGIC & 0xffff0000))
return 0;
else
- return (*save_addr & 0x0000ffff);
+ return val & 0x0000ffff;
}
#endif /* CONFIG_BOOTCOUNT_LIMIT */