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x86: Introduce RESET_VECTOR_IN_RAM option

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Create a new Kconfig symbol that allows an x86 device to begin execution
when its reset vector is in DRAM and not at the traditional 0xfffffff0.

The implementation will follow later, this is just to setup various
ENV_xxx definitions correctly for the build environment.

Change-Id: I098ecf8bf200550db1e15f178f7661c1ac516dc5
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35004
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
Martin Roth
2019-04-22 16:26:23 -06:00
committed by Kyösti Mälkki
parent a165c07ed7
commit 8418fd418c
4 changed files with 21 additions and 8 deletions
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7
src/arch/x86/Kconfig
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@@ -81,6 +81,13 @@ config AP_IN_SIPI_WAIT
default n
depends on ARCH_X86 && SMP
config RESET_VECTOR_IN_RAM
bool
depends on ARCH_X86
help
Select this option if the x86 soc implements custom code to handle the
reset vector in RAM instead of the traditional 0xfffffff0 location.
# Aligns 16bit entry code in bootblock so that hyper-threading CPUs
# can boot AP CPUs to enable their shared caches.
config SIPI_VECTOR_IN_ROM