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* x86 boot code comments typosRandy Dunlap2007-07-31
| | | | | | | Fix comments typos in new x86 boot code. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* [x86 setup] Fix assembly constraintsH. Peter Anvin2007-07-18
| | | | | | | | | | | | | | | | | | | | | | | | Fix incorrect assembly constraints. In particular, fix memory constraints used inside push..pop, which can cause invalid operation since gcc may generate %esp-relative references. Additionally: outl() should have "dN" not "dn". query_mca() shouldn't listen 16/32-bit registers in an 8-bit only context. has_eflag(): the "mask" is only used well after both the stack pointer and the output registers have been touched; this requires the output registers to be earlyclobbers (=&) and the input to exclude memory (so "ri", not "g"). Thanks to Etienne Lorrain and Chuck Ebbert for prompting this review. Cc: Etienne Lorrain <etienne_lorrain@yahoo.fr> Cc: Chuck Ebbert <cebbert@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
* Code for actual protected-mode entryH. Peter Anvin2007-07-12
This is the code which actually does the switch to protected mode, including all preparation. It is also responsible for invoking the boot loader hooks, if present. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>