arm, davinci: add NOR Boot Configuration Word

to add the "NOR Boot Configuration Word" on AM18xx based boards,
define CONFIG_SYS_DV_NOR_BOOT_CFG.

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Paulraj Sandeep <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S
index d164d6d6caa6c83b4903a7a168558f35e9f48c54..5e3074505762bc4752cbe94db54e79a9ce8b2694 100644 (file)
--- a/arch/arm/cpu/arm926ejs/start.S
+++ b/arch/arm/cpu/arm926ejs/start.S
@@ -51,9 +51,18 @@
  */
 
 
+#ifdef CONFIG_SYS_DV_NOR_BOOT_CFG
 .globl _start
 _start:
+.globl _NOR_BOOT_CFG
+_NOR_BOOT_CFG:
+       .word   CONFIG_SYS_DV_NOR_BOOT_CFG
        b       reset
+#else
+.globl _start
+_start:
+       b       reset
+#endif
 #ifdef CONFIG_SPL_BUILD
 /* No exception handlers in preloader */
        ldr     pc, _hang

diff --git a/doc/README.davinci b/doc/README.davinci
index 0204372a2f484ebf1d1894b1af31f65461e1d285..5f1bdc836c437f8f10a02b669602cd31ba5db138 100644 (file)
--- a/doc/README.davinci
+++ b/doc/README.davinci
@@ -139,3 +139,12 @@ http://www.spectrumdigital.com/product_info.php?cPath=37&products_id=214
 7) TI DA850 EVM
 http://focus.ti.com/docs/prod/folders/print/omap-l138.html
 http://www.logicpd.com/products/development-kits/zoom-omap-l138-evm-development-kit
+
+Davinci special defines
+=======================
+
+CONFIG_SYS_DV_NOR_BOOT_CFG:    AM18xx based boards, booting in NOR Boot mode
+                               need a "NOR Boot Configuration Word" stored
+                               in the NOR Flash. This define adds this.
+                               More Info about this, see:
+                               spraba5a.pdf chapter 3.1