diff options
| author | Aaron Durbin <adurbin@chromium.org> | 2013-03-20 15:50:59 -0500 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-03-22 04:06:42 +0100 |
| commit | 57686f848597f6b133c9d45a9b98a54638399b32 (patch) | |
| tree | 22c21ddc2f81cb3616a255061876042c8caf6a74 /src/cpu/x86/Kconfig | |
| parent | c8eab2c0441851a141ef47d10022fb385d0eacad (diff) | |
x86: unify amd and non-amd MTRR routines
The amd_mtrr.c file contains a copy of the fixed MTRR algorithm.
However, the AMD code needs to handle the RdMem and WrMem attribute
bits in the fixed MTRR MSRs. Instead of duplicating the code
with the one slight change introduce a Kconfig option,
X86_AMD_FIXED_MTRRS, which indicates that the RdMem and WrMem fields
need to be handled for writeback fixed MTRR ranges.
The order of how the AMD MTRR setup routine is maintained by providing
a x86_setup_fixed_mtrrs_no_enable() function which does not enable
the fixed MTRRs after setting them up. All Kconfig files which had a
Makefile that included amd/mtrr in the subdirs-y now have a default
X86_AMD_FIXED_MTRRS selection. There may be some overlap with the
agesa and socket code, but I didn't know the best way to tease out
the interdependency.
Change-Id: I256d0210d1eb3004e2043b46374dcc0337432767
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/2866
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/cpu/x86/Kconfig')
| -rw-r--r-- | src/cpu/x86/Kconfig | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig index 62d78b5436..8f05bf3b04 100644 --- a/src/cpu/x86/Kconfig +++ b/src/cpu/x86/Kconfig @@ -84,3 +84,10 @@ config SMM_MODULE_HEAP_SIZE help This option determines the size of the heap within the SMM handler modules. + +config X86_AMD_FIXED_MTRRS + bool + default n + help + This option informs the MTRR code to use the RdMem and WrMem fields + in the fixed MTRR MSRs. |