x86, boot: set up the decompression stack as early as possible

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Set up the decompression stack as soon as we know where it needs to
go.  That way we have a full-service stack as soon as possible, rather
than relying on the BP_scratch field.

Note that the stack does need to be empty during bss zeroing (or
else the stack needs to be moved out of the bss segment, which is also
an option.)

[ Impact: cleanup, minor paranoia ]

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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This commit is contained in:

H. Peter Anvin 2009-05-08 16:27:41 -07:00

parent 5b11f1cee5

commit 0a13773670

2 changed files with 12 additions and 14 deletions

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10

arch/x86/boot/compressed/head_32.S

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16

arch/x86/boot/compressed/head_64.S

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