On Fri, Nov 7, 2014 at 4:20 AM, Simon Glass <[email protected]> wrote: > We should invalidate the TLB right at the start to ensure that we don't get > false address translations even though paging is disabled. > > Signed-off-by: Simon Glass <[email protected]> > --- > > arch/x86/cpu/start16.S | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/x86/cpu/start16.S b/arch/x86/cpu/start16.S > index e718d4b..445d5a1 100644 > --- a/arch/x86/cpu/start16.S > +++ b/arch/x86/cpu/start16.S > @@ -24,6 +24,9 @@ start16: > /* Set the Cold Boot / Hard Reset flag */ > movl $GD_FLG_COLD_BOOT, %ebx > > + xorl %eax, %eax > + movl %eax, %cr3 /* Invalidate TLB */ > + > /* Turn off cache (this might require a 486-class CPU) */ > movl %cr0, %eax > orl $(X86_CR0_NW | X86_CR0_CD), %eax > --
Reviewed-by: Bin Meng <[email protected]> _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
