Add support for multiple PCI "hoses" used on various alpha platforms.

The specific intent of this commit is to pave the way for importing
Compaq XP1000 support.  These changes should not affect the i386 port.

Reviewed by: Doug Rabson <dfr@nlsystems.com>
(actually, he walked me through most of it & deserves more than reviewd-by
credit )

1 files changed, 37 insertions, 2 deletions

diff --git a/sys/pci/pci.c b/sys/pci/pci.c
index 3583a98..d09665f0 100644
--- a/sys/pci/pci.c
+++ b/sys/pci/pci.c
@@ -23,7 +23,7 @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: pci.c,v 1.102 1999/05/09 20:27:26 peter Exp $
+ * $Id: pci.c,v 1.103 1999/05/10 17:56:22 dfr Exp $
  *
  */
 
@@ -199,6 +199,26 @@ pci_readmaps(pcicfgregs *cfg, int maxmaps)
 				map[j].base     = base;
 				map64 = 0;
 			}
+#ifdef __alpha__
+			/* 
+			 *  XXX: encode hose number in the base addr,
+			 *  This will go away once the bus_space functions
+			 *  can deal with multiple hoses 
+			 */
+
+			if(cfg->hose){
+				if(map[j].base & 0x80000000){
+					printf("base   addr = 0x%x\n", map[j].base);
+					printf("hacked addr = 0x%x\n",
+					       map[j].base | (cfg->hose << 31));
+					
+					panic("hose encoding hack would clobber base addr");
+				}
+				if(cfg->hose > 1 )
+					panic("only one hose supported!");
+				map[j].base |=  (cfg->hose << 31);
+			}
+#endif
 			j++;
 		}
 	}
@@ -339,7 +359,8 @@ pci_readcfg(pcicfgregs *probe)
 		bzero(devlist_entry, sizeof *devlist_entry);
 
 		cfg = &devlist_entry->cfg;
-
+		
+		cfg->hose               = probe->hose;
 		cfg->bus		= probe->bus;
 		cfg->slot		= probe->slot;
 		cfg->func		= probe->func;
@@ -447,6 +468,7 @@ pci_freecfg(struct pci_devinfo *dinfo)
 }
 #endif
 
+
 /*
  * This is the user interface to PCI configuration space.
  */
@@ -991,7 +1013,14 @@ pci_add_children(device_t dev, int busno)
 #endif
 
 	bzero(&probe, sizeof probe);
+#ifdef __alpha__
+	probe.hose = pcib_get_hose(dev);
+#endif
+#ifdef __i386__
+	probe.hose = 0;
+#endif
 	probe.bus = busno;
+
 	for (probe.slot = 0; probe.slot <= PCI_SLOTMAX; probe.slot++) {
 		int pcifunchigh = 0;
 		for (probe.func = 0; probe.func <= pcifunchigh; probe.func++) {
@@ -1097,6 +1126,12 @@ pci_read_ivar(device_t dev, device_t child, int which, u_long *result)
 	case PCI_IVAR_SUBORDINATEBUS:
 		*result = cfg->subordinatebus;
 		break;
+	case PCI_IVAR_HOSE:
+		/*
+		 * Pass up to parent bridge.
+		 */
+		*result = pcib_get_hose(dev);
+		break;
 	default:
 		return ENOENT;
 	}