diff options
author | H. Peter Anvin <hpa@zytor.com> | 2008-01-30 13:33:01 +0100 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 13:33:01 +0100 |
commit | c4d9ba6da9f050ebb7e0d70769e3dca0fd45334f (patch) | |
tree | 03c771875a9cf2cc2026066f8a686cf53f0739f4 /include | |
parent | 2a6648e65a2939b80c44262975176a15bac3a75e (diff) |
x86 setup: make PM transition more paranoid; cleanup 32-bit entry
Make the transition to protected mode more paranoid by having
back-to-back near jump (to synchronize the 386/486 prefetch queue) and
far jump (to set up the code segment.)
While we're at it, zero as many registers as practical (for future
expandability of the 32-bit entry interface) and enter 32-bit mode
with a valid stack. Note that the 32-bit code cannot rely on this
stack, or we'll break all other existing users of the 32-bit
entrypoint, but it may make debugging hacks easier to write.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions