diff options
| author | Matthew McClintock <msm@freescale.com> | 2010-08-31 18:24:45 -0500 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2010-10-14 00:52:58 -0500 |
| commit | 2ed38b23597284cc96a97e295cb145a6202dfcd4 (patch) | |
| tree | ca1c44205682e7fbd8138617031d6fb5933e399f | |
| parent | f7a07fd9617140c6111de82400ba1bad3162fb85 (diff) | |
| download | blackbird-op-linux-2ed38b23597284cc96a97e295cb145a6202dfcd4.tar.gz blackbird-op-linux-2ed38b23597284cc96a97e295cb145a6202dfcd4.zip | |
powerpc/fsl_booke: Add support to boot from core other than 0
First we check to see if we are the first core booting up. This
is accomplished by comparing the boot_cpuid with -1, if it is we
assume this is the first core coming up.
Secondly, we need to update the initial thread info structure
to reflect the actual cpu we are running on otherwise
smp_processor_id() and related functions will return the default
initialization value of the struct or 0.
Signed-off-by: Matthew McClintock <msm@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/kernel/head_fsl_booke.S | 10 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 2 |
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S index 4faeba247854..529b817f473b 100644 --- a/arch/powerpc/kernel/head_fsl_booke.S +++ b/arch/powerpc/kernel/head_fsl_booke.S @@ -152,8 +152,11 @@ _ENTRY(__early_start) /* Check to see if we're the second processor, and jump * to the secondary_start code if so */ - mfspr r24,SPRN_PIR - cmpwi r24,0 + lis r24, boot_cpuid@h + ori r24, r24, boot_cpuid@l + lwz r24, 0(r24) + cmpwi r24, -1 + mfspr r24,SPRN_PIR bne __secondary_start #endif @@ -175,6 +178,9 @@ _ENTRY(__early_start) li r0,0 stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1) + rlwinm r22,r1,0,0,31-THREAD_SHIFT /* current thread_info */ + stw r24, TI_CPU(r22) + bl early_init #ifdef CONFIG_RELOCATABLE diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index 93666f9cabf1..8da1632f9fe7 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -46,7 +46,7 @@ extern void bootx_init(unsigned long r4, unsigned long phys); -int boot_cpuid; +int boot_cpuid = -1; EXPORT_SYMBOL_GPL(boot_cpuid); int boot_cpuid_phys; |
