CVS commit: src/sys/arch/i386/i386

["Jean-Yves Migeon" <jym%netbsd.org@localhost>]

Module Name:    src
Committed By:   jym
Date:           Thu Apr 19 18:07:05 UTC 2012

Modified Files:
        src/sys/arch/i386/i386: locore.S

Log Message:
Mirror what is done for amd64 boot and ACPI wakeup code by setting
CR0_WP (write protection bit) early on boot. Although it is set later via
cpu_init(), this can help tracking down invalid writes to pages mapped
as read only from ring 0.

No regression observed when booting under anita (QEMU) or a P4 host.

Depending on your hardware or setup, you may trigger code paths I have
overlooked. So if your machine does not start properly, or you get
page faults early during boot, please report them to me.


To generate a diff of this commit:
cvs rdiff -u -r1.98 -r1.99 src/sys/arch/i386/i386/locore.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.