PERFORCE change 207578 for review

[John Baldwin]

http://p4web.freebsd.org/@@207578?ac=10

Change 207578 by jhb at jhb_kavik on 2012/03/07 09:43:00

	Don't create a tag at all for 32-bit platforms.

Affected files ...

.. //depot/projects/pci/sys/dev/pci/pci.c#35 edit

Differences ...

==== //depot/projects/pci/sys/dev/pci/pci.c#35 (text+ko) ====

@@ -72,8 +72,6 @@
 
 #if (BUS_SPACE_MAXADDR > 0xFFFFFFFF)
 #define	PCI_DMA_BOUNDARY	0x100000000
-#else
-#define	PCI_DMA_BOUNDARY	0
 #endif
 
 #define	PCIR_IS_BIOS(cfg, reg)						\
@@ -3237,7 +3235,10 @@
 pci_attach_common(device_t dev)
 {
 	struct pci_softc *sc;
-	int busno, domain, error, tag_valid;
+	int busno, domain;
+#ifdef PCI_DMA_BOUNDARY
+	int error, tag_valid;
+#endif
 #ifdef PCI_RES_BUS
 	int rid;
 #endif
@@ -3257,6 +3258,7 @@
 	if (bootverbose)
 		device_printf(dev, "domain=%d, physical bus=%d\n",
 		    domain, busno);
+#ifdef PCI_DMA_BOUNDARY
 	tag_valid = 0;
 	if (device_get_devclass(device_get_parent(device_get_parent(dev))) !=
 	    devclass_find("pci")) {
@@ -3271,6 +3273,7 @@
 			tag_valid = 1;
 	}
 	if (!tag_valid)
+#endif
 		sc->sc_dma_tag = bus_get_dma_tag(dev);
 	return (0);
 }