Asymmetric Multi-processing (AMP) = 비대칭 core
Symmetric Multi-processing (SMP) = 대칭 core
- ARM & Linux change to AMP mode (ARM cp15 register,)
- Define Cache initialize scheme
- Define GIC initialize & distribute to core
- Core Communication rule(IPI, SharedM, scretch register)
- ......
AMP & SMP of Multicore processor
reference: http://www.embedded.com/design/mcus-processors-and-socs/4429496/Multicore-basics
Linux booting sequence of AMP system
AMP-Linux&Android Linux(Asymmetric Multi-processing)
Interrupts, NAND, DRAM sharing of AMP system(Asymmetric Multi-processing)
•u-boot
on multi core
•U-boot
must have a MP driver(multi processor driver)
•TI
have no MP driver now
•Reference
link : http://gitorious.ti.com/ti-u-boot/ti-u-boot/blobs/30837e5b21d5a742983581ab9ee3fac085311d19/doc/README.mpc8572ds
•u-boot
on single core
Action item
•Memory
map(Dram)
design for muti os(define
address)
•Flash
map design for muti os(define
address)
•u-boot
change
for
multi image load
•u-boot
change for multi os
booting(boot logic)
•Port
MP driver or Fix kernel jump code
•Kernel0/Kernel1
change for AMP
•Kernel0/Kernel1
change for multi boot image
•Kernel0/Kernel1
change
for cache enable scheme
•Kernel0/Kernel1
change for
GIC
•Kernel0/Kernel1
change for Serial
•Device
driver allocate to each kernel
Code tracing
