Date: Sat, 18 Sep 2004 09:08:05 +0200 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: John Baldwin <jhb@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/boot/i386/boot2 boot2.c Message-ID: <1860.1095491285@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 18 Sep 2004 02:07:00 -0000." <200409180207.i8I27044010045@repoman.freebsd.org>
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In message <200409180207.i8I27044010045@repoman.freebsd.org>, John Baldwin writ es: >jhb 2004-09-18 02:07:00 UTC > > FreeBSD src repository > > Modified files: > sys/boot/i386/boot2 boot2.c > Log: > 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@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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