powerpc, mpc8xx: clear top of stack
Reported-by: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Joakim Tjernlund <Joakim.Tjernlund@infinera.com>
diff --git a/arch/powerpc/cpu/mpc8xx/start.S b/arch/powerpc/cpu/mpc8xx/start.S
index 8dde4be..b8bdaae 100644
--- a/arch/powerpc/cpu/mpc8xx/start.S
+++ b/arch/powerpc/cpu/mpc8xx/start.S
@@ -144,9 +144,11 @@
ori r2, r2, CONFIG_SYS_DER@l
mtspr DER, r2
- /* set up the stack in internal DPRAM */
+ /* set up the stack on top of internal DPRAM */
lis r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE)@h
ori r3, r3, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_SIZE)@l
+ stw r0, -4(r3)
+ stw r0, -8(r3)
addi r1, r3, -8
bl board_init_f_alloc_reserve