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authorRicardo Ribalda Delgado <ricardo.ribalda@gmail.com>2016-12-20 10:08:45 +0100
committerMartin Roth <martinroth@google.com>2017-03-02 22:04:43 +0100
commitb2bb6ad2a72a926796a7eaede06ef8acd556c472 (patch)
treeecde01e2e8a87bfe54c5c35cbd20995b7b03daa6 /src/mainboard/amd/Kconfig
parente38f85915f7681f9e52970682f7c476791eb2301 (diff)
agesawrapper: Fix endless loop on bettong
AGESA AmdInitEarly() reconfigures the lapic timer in a way that conflicts with lapic/apic_timer. This results in an endless loop when printk() is called after AmdInitEarly() and before the apic_timer is initialized. This patch forces a reconfiguration of the timer after AmdInitEarly() is called. Codepath of the endless loop: printk()-> (...)-> uart_tx_byte-> uart8250_mem_tx_byte-> udelay()-> start = lapic_read(LAPIC_TMCCT); do { value = lapic_read(LAPIC_TMCCT); } while ((start - value) < ticks); [lapic_read returns the same value after AmdInitEarly()] Change-Id: I1a08789c89401b2bf6d11846ad7c376bfc68801b Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> Reviewed-on: https://review.coreboot.org/17924 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com> Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/mainboard/amd/Kconfig')
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