diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2014-10-24 09:38:31 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-10 07:42:28 +0200 |
| commit | 907fd12cf6c10b2a3d1edec09b23be5eeb4b9643 (patch) | |
| tree | 93256a01012166158fbf727005a3bd552c8e5d22 | |
| parent | c5a4c124317ee9ec444e661420e572e78fe19d08 (diff) | |
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 <pgeorgi@chromium.org>
Original-Commit-Id: d50fd02db8bf10147fd808f3030e6297b9ca0aad
Original-Change-Id: I4bb8cea7435d2a0e2c1ced050c3366d2e636cb8a
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/225420
Original-Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/9384
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
| -rw-r--r-- | src/arch/arm/armv7/bootblock_m.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/arch/arm/armv7/bootblock_m.S b/src/arch/arm/armv7/bootblock_m.S index 0a29a0b4cc..2e46ca064f 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) |