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Hi, Iam using OMAP4430 panda board for my project development. It has ARM Cortex A9 MP Core (CORE-0 & CORE-1) and linux-2.6.38 is used for this. Iam just trying to ...
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- 09-22-2011 #1
- Join Date
- Jan 2011
ARM Cortex A9 Core-'1' Execution Sequence
Iam using OMAP4430 panda board for my project development. It has ARM Cortex A9 MP Core (CORE-0 & CORE-1) and linux-2.6.38 is used for this. Iam just trying to understand the booting sequence for CORE-1.
As per my understanding the CORE-1 is triggered from wakeup_secondary(void) in arch/arm/mach-omap2/omap-smp.c by issuing "SEV" command
static void __init wakeup_secondary(void)
* Send a 'sev' to wake the secondary core from WFE.
* Drain the outstanding writes to memory
Kindly clarify my below queries,
1) Whether omap_auxcoreboot_addr() and omap_secondary_startup() is executed by CORE-'0' or CORE-'1'.
2) When & how int __cpuinit __cpu_up(unsigned int cpu) function is called (kernel/smp.c)
3) What's the purpose of __cpu_up() function.