On Thu, Sep 16, 2010 at 08:54:21AM -0400, Kevin O'Connor wrote:
On Thu, Sep 16, 2010 at 02:40:05PM +0200, Gleb Natapov wrote:
On Thu, Sep 16, 2010 at 08:38:31AM -0400, Kevin O'Connor wrote:
On Thu, Sep 16, 2010 at 08:35:16AM +0200, Gleb Natapov wrote:
On Wed, Sep 15, 2010 at 10:31:36PM -0400, Kevin O'Connor wrote:
This patch series enables SeaBIOS to relocate itself out of the e-segment, which enables that space to be used by optionroms.
How resume from S3 is affected by this change?
It shouldn't be. The resume detection and handling code (src/resume.c) is not relocated. It will detect the resume and handle it as it did before.
Before code relocation? Otherwise relocation can clobber OS memory.
I don't understand. The resume code stays in the f-segment. When it is called it doesn't relocate itself, and doesn't reference the relocated memory.
If relocation is done before checking for S3 resume the following may happen:
1. BIOS starts and relocates POST code to address A 2. BIOS runs POST and boots an OS 3. OS puts most important info into address A 4. OS does S3 suspend 5. S3 resume happens 6. BIOS start and relocates POST code to address A 7. BIOS checks for S3 and jumps to resume vector 8. OS can't resume since address A is corrupted
So the question is what happens first check for S3 resume or POST code relocation?
-- Gleb.