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[U-Boot,4/8] kmp204x: update the CONFIG_PRAM and CONFIG_KM_RESERVED_PRAM defines

Message ID 1398862909-17580-5-git-send-email-valentin.longchamp@keymile.com
State Accepted
Delegated to: York Sun
Headers show

Commit Message

Valentin Longchamp April 30, 2014, 1:01 p.m. UTC 
This prevents u-boot from accessing into the reserved memory areas that
we have for /var and the logbooks.

Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
---

 include/configs/km/kmp204x-common.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
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Patch

diff --git a/include/configs/km/kmp204x-common.h b/include/configs/km/kmp204x-common.h
index 913084f..c8af652 100644
--- a/include/configs/km/kmp204x-common.h
+++ b/include/configs/km/kmp204x-common.h
@@ -139,10 +139,12 @@  unsigned long get_board_sys_clk(unsigned long dummy);
 #define CONFIG_KM_PNVRAM	0x80000
 /* physical RAM MTD size [hex] */
 #define CONFIG_KM_PHRAM		0x100000
-/* resereved pram area at the end of memroy [hex] */
-#define CONFIG_KM_RESERVED_PRAM	0x0
-/* enable protected RAM */
-#define CONFIG_PRAM		0
+/* reserved pram area at the end of memory [hex]
+ * u-boot reserves some memory for the MP boot page */
+#define CONFIG_KM_RESERVED_PRAM	0x1000
+/* set the default PRAM value to at least PNVRAM + PHRAM when pram env variable
+ * is not valid yet, which is the case for when u-boot copies itself to RAM */
+#define CONFIG_PRAM		((CONFIG_KM_PNVRAM + CONFIG_KM_PHRAM)>>10)
 
 #define CONFIG_KM_CRAMFS_ADDR	0x2000000
 #define CONFIG_KM_KERNEL_ADDR	0x1000000	/* max kernel size 15.5Mbytes */