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x86: Add some notes for MRC cache with Intel FSP

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MRC cache relies on Intel FSP to produce a special GUID that
contains the MRC cache data. Add such information in the
CONFIG_ENABLE_MRC_CACHE help entry.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2016-05-22 01:45:27 -07:00
parent 2baf3a5584
commit 5c60a3abde
1 changed files with 7 additions and 0 deletions
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7
arch/x86/Kconfig
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@ -274,6 +274,13 @@ config ENABLE_MRC_CACHE
to be used for speeding up boot time on future reboots and/or to be used for speeding up boot time on future reboots and/or
power cycles. power cycles.
For platforms that use Intel FSP for the memory initialization,
please check FSP output HOB via U-Boot command 'fsp hob' to see
if there is FSP_NON_VOLATILE_STORAGE_HOB_GUID (asm/fsp/fsp_hob.h).
If such GUID does not exist, MRC cache is not avaiable on such
platform (eg: Intel Queensbay), which means selecting this option
here does not make any difference.
config HAVE_MRC config HAVE_MRC
bool "Add a System Agent binary" bool "Add a System Agent binary"
depends on !HAVE_FSP depends on !HAVE_FSP