patch-2.4.23 linux-2.4.23/arch/ppc/kernel/ibm44x_common.c

• Lines: 38
• Date: 2003-11-28 10:26:19.000000000 -0800
• Orig file: linux-2.4.22/arch/ppc/kernel/ibm44x_common.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.22/arch/ppc/kernel/ibm44x_common.c linux-2.4.23/arch/ppc/kernel/ibm44x_common.c
@@ -0,0 +1,37 @@
+/*
+ * arch/ppc/kernel/ibm44x_common.c
+ *
+ * PPC44x system library
+ *
+ * Matt Porter <mporter@mvista.com>
+ * Copyright 2002-2003 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+#include <linux/config.h>
+#include <linux/types.h>
+#include <asm/ibm44x.h>
+#include <asm/mmu.h>
+
+phys_addr_t fixup_bigphys_addr(phys_addr_t addr, phys_addr_t size)
+{
+	phys_addr_t page_4gb = 0;
+
+        /*
+	 * Trap the least significant 32-bit portions of an
+	 * address in the 440's 36-bit address space.  Fix
+	 * them up with the appropriate ERPN
+	 */
+	if ((addr >= PPC44x_IO_LO) && (addr < PPC44x_IO_HI))
+		page_4gb = PPC44x_IO_PAGE;
+	else if ((addr >= PPC44x_PCICFG_LO) && (addr < PPC44x_PCICFG_HI))
+		page_4gb = PPC44x_PCICFG_PAGE;
+	else if ((addr >= PPC44x_PCIMEM_LO) && (addr < PPC44x_PCIMEM_HI))
+		page_4gb = PPC44x_PCIMEM_PAGE;
+
+	return (page_4gb | addr);
+};