aboutsummaryrefslogtreecommitdiff
path: root/arch/x86/boot/pm.c
diff options
context:
space:
mode:
authorH. Peter Anvin <hpa@zytor.com>2008-01-30 13:33:01 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-30 13:33:01 +0100
commitc4d9ba6da9f050ebb7e0d70769e3dca0fd45334f (patch)
tree03c771875a9cf2cc2026066f8a686cf53f0739f4 /arch/x86/boot/pm.c
parent2a6648e65a2939b80c44262975176a15bac3a75e (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 'arch/x86/boot/pm.c')
0 files changed, 0 insertions, 0 deletions