Date: Thu, 29 Jul 1999 09:04:59 +0100 (BST) From: Doug Rabson <dfr@nlsystems.com> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: Doug Rabson <dfr@FreeBSD.org>, current@FreeBSD.org Subject: Re: cvs commit: src/sys/alpha/include resource.h src/sys/alpha/pci pcibus.c src/sys/i386/include resource.h src/sys/pci pci.c pci_compat.c Message-ID: <Pine.BSF.4.10.9907290903470.385-100000@salmon.nlsystems.com> In-Reply-To: <199907281434.KAA07938@khavrinen.lcs.mit.edu>
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On Wed, 28 Jul 1999, Garrett Wollman wrote: > <<On Wed, 28 Jul 1999 00:57:49 -0700 (PDT), Doug Rabson <dfr@FreeBSD.org> said: > > > Add support for SYS_RES_DENSE and SYS_RES_BWX resource types. These are > > equivalent to SYS_RES_MEMORY for x86 but for alpha, the rman_get_virtual() > > address of the resource is initialised to point into either dense-mapped > > or bwx-mapped space respectively, allowing direct memory pointers to be > > used to device memory. > > This makes me rather uncomfortable, on several fronts. I believe it > would be more appropriate to add a type argument to rman_get_virtual. To make that work, rman_get_virtual would need to be a BUS interface method. One possible alternative is to use SYS_RES_MEMORY with a set of flags to specify how the memory is to be accessed. -- Doug Rabson Mail: dfr@nlsystems.com Nonlinear Systems Ltd. Phone: +44 181 442 9037 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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