diff options
| author | Dale Rahn <drahn@cvs.openbsd.org> | 2002-01-26 20:53:00 +0000 |
|---|---|---|
| committer | Dale Rahn <drahn@cvs.openbsd.org> | 2002-01-26 20:53:00 +0000 |
| commit | 7df04d79d1a035e4471659a717f65c4ba9b8c2ad (patch) | |
| tree | 0f8c0a994dd3ed0aa70f2937ba46e8c5d4c39097 /sys/arch/macppc | |
| parent | 38743975ebb7155636e48dbc1a83b038dd8327bb (diff) | |
Kludge, protect against bus faults during pci probes. allows OpenBSD
to boot on a B&W G3.
Diffstat (limited to 'sys/arch/macppc')
| -rw-r--r-- | sys/arch/macppc/pci/mpcpcibus.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sys/arch/macppc/pci/mpcpcibus.c b/sys/arch/macppc/pci/mpcpcibus.c index f13671a0e2f..a0cacce7eaf 100644 --- a/sys/arch/macppc/pci/mpcpcibus.c +++ b/sys/arch/macppc/pci/mpcpcibus.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mpcpcibus.c,v 1.5 2001/12/21 19:52:00 drahn Exp $ */ +/* $OpenBSD: mpcpcibus.c,v 1.6 2002/01/26 20:52:59 drahn Exp $ */ /* * Copyright (c) 1997 Per Fogelstrom @@ -46,6 +46,7 @@ #include <uvm/uvm_extern.h> #include <machine/autoconf.h> +#include <machine/pcb.h> #include <machine/bat.h> #include <machine/powerpc.h> @@ -831,11 +832,14 @@ mpc_conf_read(cpv, tag, offset) int offset; { struct pcibr_config *cp = cpv; - pcireg_t data; u_int32_t reg; int s; int daddr = 0; + faultbuf env; + void *oldh; + + if(offset & 3 || offset < 0 || offset >= 0x100) { #ifdef DEBUG_CONFIG @@ -856,12 +860,21 @@ mpc_conf_read(cpv, tag, offset) s = splhigh(); + oldh = curpcb->pcb_onfault; + if (setfault(env)) { + /* we faulted during the read? */ + curpcb->pcb_onfault = oldh; + return 0xffffffff; + } + bus_space_write_4(cp->lc_iot, cp->ioh_cf8, 0, reg); bus_space_read_4(cp->lc_iot, cp->ioh_cf8, 0); /* XXX */ data = bus_space_read_4(cp->lc_iot, cp->ioh_cfc, daddr); bus_space_write_4(cp->lc_iot, cp->ioh_cf8, 0, 0); /* disable */ bus_space_read_4(cp->lc_iot, cp->ioh_cf8, 0); /* XXX */ + curpcb->pcb_onfault = oldh; + splx(s); #ifdef DEBUG_CONFIG if (!((offset == 0) && (data == 0xffffffff))) { |