From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: <linuxppc-dev@ozlabs.org>
Subject: [PATCH] powerpc: Fix 32-bit SMP boot on CHRP
Date: Tue, 14 Oct 2008 15:38:48 +1100 [thread overview]
Message-ID: <20081014043924.A950DDDDFD@ozlabs.org> (raw)
prom_init was changed to take a new argument, the address
where the kernel is loaded, which is now used to copy the
SMP spin loop down before use.
However, only head_64.S was adapted to pass this new value,
not head_32.S, thus breaking SMP boot on 32-bit SMP CHRP
machines.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
arch/powerpc/kernel/head_32.S | 6 ++++++
1 file changed, 6 insertions(+)
--- linux-work.orig/arch/powerpc/kernel/head_32.S 2008-10-14 15:22:33.000000000 +1100
+++ linux-work/arch/powerpc/kernel/head_32.S 2008-10-14 15:23:58.000000000 +1100
@@ -110,6 +110,12 @@ __start:
#ifdef CONFIG_PPC_MULTIPLATFORM
cmpwi 0,r5,0
beq 1f
+
+ /* find out where we are now */
+ bcl 20,31,$+4
+0: mflr r8 /* r8 = runtime addr here */
+ addis r8,r8,(_stext - 0b)@ha
+ addi r8,r8,(_stext - 0b)@l /* current runtime base addr */
bl prom_init
trap
#endif
reply other threads:[~2008-10-14 4:38 UTC|newest]
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