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[PXE] Add PMM support to romprefix.S (untested)

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ROM initialisation vector now attempts to allocate a 2MB block using
PMM.  If successful, it copies the ROM image to this block, then
shrinks the ROM image to allow for more option ROMs.  If unsuccessful,
it leaves the ROM as-is.

ROM BEV now attempts to return to the BIOS, resorting to INT 18 only
if the BIOS stack has been corrupted.
This commit is contained in:
Michael Brown
2008-03-09 22:13:07 +00:00
parent fad35829eb
commit 12f203c606
3 changed files with 246 additions and 76 deletions
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2
src/arch/i386/scripts/i386.lds
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@@ -257,6 +257,8 @@ SECTIONS {
/*
* Values calculated to save code from doing it
*/
_prefix_size_pgh = ( ( _prefix_size + 15 ) / 16 );
_prefix_size_sect = ( ( _prefix_size + 511 ) / 512 );
_text16_size_pgh = ( ( _text16_size + 15 ) / 16 );
_data16_size_pgh = ( ( _data16_size + 15 ) / 16 );