x86: Don't set up MTRRs if previously done
When starting U-Boot from a previous-stage bootloader we presumably don't
need to set up the variable MTRRs. In fact this could be harmful if the
existing settings are not what U-Boot uses.
Skip that step in this case.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/x86/cpu/i386/cpu.c b/arch/x86/cpu/i386/cpu.c
index e59215c..c7f6c5a 100644
--- a/arch/x86/cpu/i386/cpu.c
+++ b/arch/x86/cpu/i386/cpu.c
@@ -423,7 +423,7 @@
u64 mtrr_cap;
/* Configure fixed range MTRRs for some legacy regions */
- if (!gd->arch.has_mtrr)
+ if (!gd->arch.has_mtrr || !ll_boot_init())
return;
mtrr_cap = native_read_msr(MTRR_CAP_MSR);