Stefan Reinauer ([email protected]) just uploaded a new patch set to 
gerrit, which you can find at http://review.coreboot.org/2668

-gerrit

commit f5443f112f7d039a20fe2af9e9f73fbb3ff5776e
Author: Gabe Black <[email protected]>
Date:   Tue Feb 26 19:08:28 2013 -0800

    libpayload: Move over to the payload's stack during startup
    
    Don't keep using the coreboot stack on ARMv7.
    
    Change-Id: I734c5d77f8584e30ee0c720d41e21e3040f56db4
    Signed-off-by: Gabe Black <[email protected]>
---
 payloads/libpayload/arch/armv7/head.S | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/payloads/libpayload/arch/armv7/head.S 
b/payloads/libpayload/arch/armv7/head.S
index e1b5737..7a706e3 100644
--- a/payloads/libpayload/arch/armv7/head.S
+++ b/payloads/libpayload/arch/armv7/head.S
@@ -31,14 +31,21 @@
        .text
        .align 4
 
+1:
+.word  _stack
+
 /*
  * Our entry point
  */
 _entry:
 
        /* TODO: disable interrupts */
+
        /* TODO: Clear BSS */
-       /* TODO: Setup new stack */
+
+       /* Setup new stack */
+       ldr sp, 1b
+
        /* TODO: Save old stack pointer */
 
        /* Let's rock. */

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