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Until HOOK_INIT has completed, do not allow any tasks other than HOOKS or IDLE to be scheduled. Programmers often make the assumption that a HOOK_INIT function is guaranteed to be run before task code that depends on it, so let's make it so. BUG=chromium:649398 BRANCH=None TEST=Manual on kevin, compare boot without patch: ... [0.004 power state 0 = G3, in 0x0008] <-- from chipset task RTC: 0x00000000 (0.00 s) [0.004 power state 4 = G3->S5, in 0x0008] RTC: 0x00000000 (0.00 s) [0.005 clear MKBP fifo] [0.006 clear MKBP fifo] [0.006 KB init state: ... <-- from keyscan task [0.012 SW 0x05] [0.155 hash start 0x00020000 0x00019a38] [0.158 HOOK_INIT DONE!] ... to boot with patch: ... RTC: 0x58cc614c (1489789260.00 s) [0.004 clear MKBP fifo] [0.005 clear MKBP fifo] [0.010 SW 0x05] [0.155 hash start 0x00020000 0x000198e0] [0.157 HOOK_INIT DONE!] ... Also, verify kevin boots to OS and is generally functional through sysjump and basic tasks, and verify elm (stm32f0 / cortex-m0) boots. Change-Id: If56fab05ce9b9650feb93c5cfc2d084aa281e622 Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/456628 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>