Patch set updated for coreboot: 9ecaa77 armv7-m: set stack pointer to _estack

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/9384

-gerrit

commit 9ecaa773b147c2f0cadde021291c1adc6e841809
Author: Daisuke Nojiri 
Date:   Fri Oct 24 09:38:31 2014 -0700

armv7-m: set stack pointer to _estack

this change sets the stack pointer to the value specified in
    memlayout.ld before jumping to the bootblock.

BUG=none
    BRANCH=ToT
    TEST=Built cosmos and all other current boards.

Change-Id: Ic1b790f27bce431124ba70cc2d3d3607c537564b
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: d50fd02db8bf10147fd808f3030e6297b9ca0aad
    Original-Change-Id: I4bb8cea7435d2a0e2c1ced050c3366d2e636cb8a
    Original-Signed-off-by: Daisuke Nojiri 
    Original-Reviewed-on: https://chromium-review.googlesource.com/225420
    Original-Reviewed-by: Vadim Bendebury 
---
 src/arch/arm/armv7/bootblock_m.S | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/src/arch/arm/armv7/bootblock_m.S b/src/arch/arm/armv7/bootblock_m.S
index 0a29a0b..2e46ca0 100644
--- a/src/arch/arm/armv7/bootblock_m.S
+++ b/src/arch/arm/armv7/bootblock_m.S
@@ -31,5 +31,20 @@
 #include <arch/asm.h>

ENTRY(_start)
+	/*
+	 * Initialize the stack to a known value. This is used to check for
+	 * stack overflow later in the boot process.
+	 */
+	ldr	r0, =_stack
+	ldr	r1, =_estack
+	ldr	r2, =0xdeadbeef
+init_stack_loop:
+	str	r2, [r0]
+	add	r0, #4
+	cmp	r0, r1
+	bne	init_stack_loop
+
+call_bootblock:
+	ldr	sp, =_estack /* Set up stack pointer */
    bl	main
 ENDPROC(_start)