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SubjectRe: missing mxcsr initialization
On Wed, Oct 25, 2000 at 02:46:19PM -0400, Doug Ledford wrote:
> @@ -214,8 +215,8 @@
> movb ready,%al # First CPU if 0
> orb %al,%al
> jz 4f # First CPU skip this stuff
> - movl %cr4,%eax # Turn on 4Mb pages
> - orl $16,%eax
> + movl %cr4,%eax # Set CR4 register to match first CPU
> + orl X86_MMU_CR4,%eax
> movl %eax,%cr4
> movl %cr3,%eax # Intel specification clarification says
> movl %eax,%cr3 # to do this. Maybe it makes a difference.

I had a fast look and I don't see why you do that change. Infact
I think this whole section could be removed:

movl %cr4,%eax # Turn on 4Mb pages
orl $16,%eax
movl %eax,%cr4

We just reload the cr4 at the very early part of the boot stage.

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