Author: emaste Date: Tue Nov 11 14:59:46 2014 New Revision: 274382 URL: https://svnweb.freebsd.org/changeset/base/274382
Log: Add workaround for vt efifb's early use of PHYS_TO_DMAP In vt_efifb_init the framebuffer's physaddr is passed to PHYS_TO_DMAP before the DMAP is setup. The result is not actually accessed until after the mapping is setup, though. Loosen the assertion in PHYS_TO_DMAP for now, to allow use when dmaplimit == 0. Reviewed by: kib Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D1142 Modified: head/sys/amd64/include/vmparam.h Modified: head/sys/amd64/include/vmparam.h ============================================================================== --- head/sys/amd64/include/vmparam.h Tue Nov 11 14:30:35 2014 (r274381) +++ head/sys/amd64/include/vmparam.h Tue Nov 11 14:59:46 2014 (r274382) @@ -175,8 +175,14 @@ #define VM_MAX_ADDRESS UPT_MAX_ADDRESS #define VM_MIN_ADDRESS (0) +/* + * XXX Allowing dmaplimit == 0 is a temporary workaround for vt(4) efifb's + * early use of PHYS_TO_DMAP before the mapping is actually setup. This works + * because the result is not actually accessed until later, but the early + * vt fb startup needs to be reworked. + */ #define PHYS_TO_DMAP(x) ({ \ - KASSERT((x) < dmaplimit, \ + KASSERT(dmaplimit == 0 || (x) < dmaplimit, \ ("physical address %#jx not covered by the DMAP", \ (uintmax_t)x)); \ (x) | DMAP_MIN_ADDRESS; }) _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
