[POWERPC] Rename 44x bootwrapper

Rename the 44x.c wrapper file to 4xx.c.  This will allow us to add common
functions in a single file that can be shared across all of 4xx.

Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 85 insertions, 0 deletions

diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c
new file mode 100644
index 000000000000..9f64e840bef6
--- /dev/null
+++ b/arch/powerpc/boot/4xx.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2007 David Gibson, IBM Corporation.
+ *
+ * Based on earlier code:
+ *   Matt Porter <mporter@kernel.crashing.org>
+ *   Copyright 2002-2005 MontaVista Software Inc.
+ *
+ *   Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
+ *   Copyright (c) 2003, 2004 Zultys Technologies
+ *
+ * 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 <stddef.h>
+#include "types.h"
+#include "string.h"
+#include "stdio.h"
+#include "ops.h"
+#include "reg.h"
+#include "dcr.h"
+
+/* Read the 44x memory controller to get size of system memory. */
+void ibm44x_fixup_memsize(void)
+{
+        int i;
+        unsigned long memsize, bank_config;
+
+        memsize = 0;
+        for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) {
+                mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]);
+                bank_config = mfdcr(DCRN_SDRAM0_CFGDATA);
+
+                if (bank_config & SDRAM_CONFIG_BANK_ENABLE)
+                        memsize += SDRAM_CONFIG_BANK_SIZE(bank_config);
+        }
+
+        dt_fixup_memory(0, memsize);
+}
+
+#define SPRN_DBCR0              0x134
+#define   DBCR0_RST_SYSTEM      0x30000000
+
+void ibm44x_dbcr_reset(void)
+{
+        unsigned long tmp;
+
+        asm volatile (
+                "mfspr  %0,%1\n"
+                "oris   %0,%0,%2@h\n"
+                "mtspr  %1,%0"
+                : "=&r"(tmp) : "i"(SPRN_DBCR0), "i"(DBCR0_RST_SYSTEM)
+                );
+
+}
+
+/* Read 4xx EBC bus bridge registers to get mappings of the peripheral
+ * banks into the OPB address space */
+void ibm4xx_fixup_ebc_ranges(const char *ebc)
+{
+        void *devp;
+        u32 bxcr;
+        u32 ranges[EBC_NUM_BANKS*4];
+        u32 *p = ranges;
+        int i;
+
+        for (i = 0; i < EBC_NUM_BANKS; i++) {
+                mtdcr(DCRN_EBC0_CFGADDR, EBC_BXCR(i));
+                bxcr = mfdcr(DCRN_EBC0_CFGDATA);
+
+                if ((bxcr & EBC_BXCR_BU) != EBC_BXCR_BU_OFF) {
+                        *p++ = i;
+                        *p++ = 0;
+                        *p++ = bxcr & EBC_BXCR_BAS;
+                        *p++ = EBC_BXCR_BANK_SIZE(bxcr);
+                }
+        }
+
+        devp = finddevice(ebc);
+        if (! devp)
+                fatal("Couldn't locate EBC node %s\n\r", ebc);
+
+        setprop(devp, "ranges", ranges, (p - ranges) * sizeof(u32));
+}