android booting process (components involved and interactions with the internal storage)

[Kanchan Joshi]

Hi All,

I am trying to develop an understanding on the android boot process, in general. From the point power button (on android phone/tablet) is pressed to the point eMMC driver is loaded during kernel startup. Activities like zygote/dalvik vm initialization happens much later I suppose, and, due to that, not of much interest to me. 

I fancy that, at high level, it may be about bootloader loading a kernel(either normal or recovery) but I am looking forward to know the detailed interactions between the components involved (any pre boot-loader component, boot loader, kernel) and whether these assume a specific layout(partitions, their contents) on eMMC. 

Appreciate the help.

Best regards.

[hedwin]

Have a look at this http://omappedia.org/wiki/Bootloader_Project this shows how the boot process takes place on a TI OMAP SoC

Should provide the understanding you're looking for.

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[raja pavan]

Hi

So do you have any specific board in mind or can we discuss even in the context of emulator

Pavan

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[hedwin]

beagleboard and pandaboard a good both have large community support

[Kanchan Joshi]

Thank you Hedwin, for the wonderful link.

Raja, I have a google nexus device (Nexus 4, and Nexus 7) and I intended to check the boot sequence on'em.

Nexus 4 has qualcomm msm chipset and nexus 7 has nvidia tegra chipset.