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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>
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f7a07fd961
commit
2ed38b2359
2 changed files with 9 additions and 3 deletions
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@ -152,8 +152,11 @@ _ENTRY(__early_start)
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/* Check to see if we're the second processor, and jump
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* to the secondary_start code if so
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*/
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mfspr r24,SPRN_PIR
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cmpwi r24,0
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lis r24, boot_cpuid@h
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ori r24, r24, boot_cpuid@l
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lwz r24, 0(r24)
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cmpwi r24, -1
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mfspr r24,SPRN_PIR
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bne __secondary_start
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#endif
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@ -175,6 +178,9 @@ _ENTRY(__early_start)
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li r0,0
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stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1)
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rlwinm r22,r1,0,0,31-THREAD_SHIFT /* current thread_info */
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stw r24, TI_CPU(r22)
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bl early_init
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#ifdef CONFIG_RELOCATABLE
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@ -46,7 +46,7 @@
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extern void bootx_init(unsigned long r4, unsigned long phys);
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int boot_cpuid;
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int boot_cpuid = -1;
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EXPORT_SYMBOL_GPL(boot_cpuid);
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int boot_cpuid_phys;
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