cvs commit: src/sys/boot/i386/boot2 boot2.c
phk at phk.freebsd.dk
Sat Sep 18 00:08:08 PDT 2004
In message <200409180207.i8I27044010045 at repoman.freebsd.org>, John Baldwin writ
>jhb 2004-09-18 02:07:00 UTC
> FreeBSD src repository
> Modified files:
> sys/boot/i386/boot2 boot2.c
> A long, long time ago in a CVS branch far away (specifically, HEAD prior
> to 4.0 and RELENG_3), the BTX mini-kernel used paging rather than flat
> mode and clients were limited to a virtual address space of 16 megabytes.
> Because of this limitation, boot2 silently masked all physical addresses
> in any binaries it loaded so that they were always loaded into the first
> 16 Meg. Since BTX no longer has this limitation (and hasn't for a long
> time), remove the masking from boot2. This allows boot2 to load kernels
> larger than about 12 to 14 meg (12 for non-PAE, 14 for PAE).
Does this also give us better space for isa_dma bounce buffers ?
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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