From 57686f848597f6b133c9d45a9b98a54638399b32 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Wed, 20 Mar 2013 15:50:59 -0500 Subject: 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 Reviewed-on: http://review.coreboot.org/2866 Reviewed-by: Stefan Reinauer Tested-by: build bot (Jenkins) --- src/cpu/x86/Kconfig | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'src/cpu/x86/Kconfig') 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. -- cgit v1.2.3