Date: Sat, 23 Feb 2008 18:42:53 +0000 (UTC) From: Marcel Moolenaar <marcel@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/boot/powerpc/uboot start.S Message-ID: <200802231842.m1NIgrnx015352@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
marcel 2008-02-23 18:42:53 UTC
FreeBSD src repository
Modified files:
sys/boot/powerpc/uboot start.S
Log:
o Keep running on U-Boot's stack.
o Disable interrupts while not running U-Boot code. We clobber
registers that the U-Boot interrupt handlers assume to be
fixed as per the U-Boot register usage. At this time this only
applies to r14. U-Boot uses r2 now for what they used r29 for.
After we restore r14 in preparation of doing the syscall, we
re-enable interrupts. When we return from the syscall, we
disable interrupts and restore the callee-saved r14.
Revision Changes Path
1.3 +23 -21 src/sys/boot/powerpc/uboot/start.S
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200802231842.m1NIgrnx015352>