PERFORCE change 207575 for review

[John Baldwin]

http://p4web.freebsd.org/@@207575?ac=10

Change 207575 by jhb at jhb_kavik on 2012/03/07 08:59:01

	Now that boundaries are bus_addr_t, remove this PAE #ifdef.

Affected files ...

.. //depot/projects/pci/sys/dev/pci/pci.c#34 edit

Differences ...

==== //depot/projects/pci/sys/dev/pci/pci.c#34 (text+ko) ====

@@ -70,17 +70,10 @@
 #include "pcib_if.h"
 #include "pci_if.h"
 
-/*
- * XXX: Due to a limitation of the bus_dma_tag_create() API, we cannot
- * specify a 4GB boundary on 32-bit targets.  Usually this does not
- * matter as it is ok to use a boundary of 0 on these systems.
- * However, in the case of PAE, DMA addresses can cross a 4GB
- * boundary, so as a workaround use a 2GB boundary.
- */
-#ifdef PAE
-#define	PCI_DMA_BOUNDARY	(1u << 31)
+#if (BUS_SPACE_MAXADDR > 0xFFFFFFFF)
+#define	PCI_DMA_BOUNDARY	0x100000000
 #else
-#define	PCI_DMA_BOUNDARY	((bus_size_t)((uint64_t)1 << 32))
+#define	PCI_DMA_BOUNDARY	0
 #endif
 
 #define	PCIR_IS_BIOS(cfg, reg)						\