ppc4xx: Add initial Zeus (PPC405EP) board support

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/board/amcc/bubinga/bubinga.c b/board/amcc/bubinga/bubinga.c
index fe6ce8a..66e7509 100644
--- a/board/amcc/bubinga/bubinga.c
+++ b/board/amcc/bubinga/bubinga.c
@@ -20,10 +20,12 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  * MA 02111-1307 USA
  */
-long int spd_sdram(void);
 
 #include <common.h>
 #include <asm/processor.h>
+#include <asm/io.h>
+
+long int spd_sdram(void);
 
 int board_early_init_f(void)
 {
@@ -34,6 +36,15 @@
 	mtdcr(uictr, 0x00000010);	/* set int trigger levels */
 	mtdcr(uicsr, 0xFFFFFFFF);	/* clear all ints */
 
+	/*
+	 * Configure CPC0_PCI to enable PerWE as output
+	 * and enable the internal PCI arbiter if selected
+	 */
+	if (in_8((void *)FPGA_REG1) & FPGA_REG1_PCI_INT_ARB)
+		mtdcr(cpc0_pci, CPC0_PCI_HOST_CFG_EN | CPC0_PCI_ARBIT_EN);
+	else
+		mtdcr(cpc0_pci, CPC0_PCI_HOST_CFG_EN);
+
 	return 0;
 }