diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2008-08-11 20:56:56 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2008-08-11 20:56:56 +0000 |
| commit | fa52c6dbee44e5933c7655930f53a5602448116c (patch) | |
| tree | a9c0e89be60a403bdbca5f0ce3b149ad8fe0561b /sys/arch/sparc64 | |
| parent | 0e48c387a157680176359531c8c9f3bc434d1fbe (diff) | |
Allow mapping mmio regions that are not page aligned.
ok miod@
Diffstat (limited to 'sys/arch/sparc64')
| -rw-r--r-- | sys/arch/sparc64/dev/vgafb.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/sys/arch/sparc64/dev/vgafb.c b/sys/arch/sparc64/dev/vgafb.c index 26e01b9a9ea..98d79f385ac 100644 --- a/sys/arch/sparc64/dev/vgafb.c +++ b/sys/arch/sparc64/dev/vgafb.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vgafb.c,v 1.52 2008/03/23 12:10:53 miod Exp $ */ +/* $OpenBSD: vgafb.c,v 1.53 2008/08/11 20:56:55 kettenis Exp $ */ /* * Copyright (c) 2001 Jason L. Wright (jason@thought.net) @@ -418,10 +418,19 @@ vgafb_mmap(v, off, prot) sc->sc_mem_addr, off - sc->sc_mem_addr, prot, BUS_SPACE_MAP_LINEAR)); - if (off >= sc->sc_mmio_addr && + /* + * ATI Mach64 boards have an mmio region that's + * typically smaller than a page and therefore may end + * up being not aligned to a page boundary. Alow the + * whole page to be mapped and hope the firmware + * didn't put any resources on the same page that + * belong to a different device. + */ + if (off >= trunc_page(sc->sc_mmio_addr) && off < (sc->sc_mmio_addr + sc->sc_mmio_size)) return (bus_space_mmap(sc->sc_mem_t, - sc->sc_mmio_addr, off - sc->sc_mmio_addr, + trunc_page(sc->sc_mmio_addr), + off - trunc_page(sc->sc_mmio_addr), prot, BUS_SPACE_MAP_LINEAR)); break; |