3A2H: Add the intel 82574 and 82576 net card support.

Now the net card only the ping command is normally.

Change-Id: I7fa6c3729921226d39336f7ac41c87a3b7d290bb

Targets/Bonito3a2h/conf/Bonito.3a2h

@@ -175,8 +175,8 @@ pcibr2		at mainbus0 #For the port1 device register
 pcibr4		at mainbus0 #For the port2 device register
 pcibr6		at mainbus0 #For the port3 device register
 pci*		at pcibr?
-#ppb*		at pci? dev ? function ?	# PCI-PCI bridges
-#pci*		at ppb? bus ?
+ppb*		at pci? dev ? function ?	# PCI-PCI bridges
+pci*		at ppb? bus ?
 
 
 #### SCSI support
@@ -192,6 +192,7 @@ pci*		at pcibr?
 # fxp normally only used for debugging (enable/disable both)
 #fxp0        at pci? dev ? function ?        # Intel 82559 Device
 #inphy*      at mii? phy ?                   # Intel 82555 PHYs
+igb*		at pci? dev ? function ?	# Intel 82576
 # rtl*        at pci? dev ? function ?
 #rte*		at pci? dev ? function ?
 #rtk*		at pci? dev ? function ?

sys/dev/bus_dma.c

@@ -294,6 +294,7 @@ _dmamap_load_mbuf(t, map, m0, flags)
 	paddr_t lastaddr;
 	int seg, error, first;
 	struct mbuf *m;
+	char *tmp;
 
 	/*
 	 * Make sure that on error condition we return "no valid mappings."
@@ -312,6 +313,13 @@ _dmamap_load_mbuf(t, map, m0, flags)
 	seg = 0;
 	error = 0;
 	for (m = m0; m != NULL && error == 0; m = m->m_next) {
+#ifdef LOONGSON_3A2H
+		if ((unsigned int )m->m_data & 0xf) {
+			tmp = (char *)(m->m_data - (((unsigned int )m->m_data) & 0xf));
+			memcpy(tmp,m->m_data,m->m_len);
+			m->m_data = tmp;
+		}
+#endif
 		error = _dmamap_load_buffer(t, map, m->m_data, m->m_len,
 		    NULL, flags, &lastaddr, &seg, first);
 		first = 0;