openwrt-xburst/target/linux/mpc83xx/patches-2.6.33/003-boot_rb600.patch

--- /dev/null
+++ b/arch/powerpc/boot/rb600.c
@@ -0,0 +1,80 @@
+/*
+ * The RouterBOARD platform -- for booting RB600(A) RouterBOARDs.
+ *
+ * Author: Michael Guntsche <mike@it-loops.com>
+ *
+ * Copyright (c) 2009 Michael Guntsche
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ */
+
+#include "ops.h"
+#include "types.h"
+#include "io.h"
+#include "stdio.h"
+#include <libfdt.h>
+
+BSS_STACK(4*1024);
+
+u64 memsize64;
+const void *fw_dtb;
+
+static void rb600_fixups(void)
+{
+	const u32 *reg, *timebase, *clock;
+	int node, size;
+	void *chosen;
+	const char* bootargs;
+
+	dt_fixup_memory(0, memsize64);
+
+	/* Set the MAC addresses. */
+	node = fdt_path_offset(fw_dtb, "/soc8343@e0000000/ethernet@24000");
+	reg = fdt_getprop(fw_dtb, node, "mac-address", &size);
+	dt_fixup_mac_address_by_alias("ethernet1", (const u8 *)reg);
+
+	node = fdt_path_offset(fw_dtb, "/soc8343@e0000000/ethernet@25000");
+	reg = fdt_getprop(fw_dtb, node, "mac-address", &size);
+	dt_fixup_mac_address_by_alias("ethernet0", (const u8 *)reg);
+
+	/* Find the CPU timebase and clock frequencies. */
+	node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "cpu", sizeof("cpu"));
+	timebase = fdt_getprop(fw_dtb, node, "timebase-frequency", &size);
+	clock = fdt_getprop(fw_dtb, node, "clock-frequency", &size);
+	dt_fixup_cpu_clocks(*clock, *timebase, 0);
+
+	/* Fixup chosen
+	 * The bootloader reads the kernelparm segment and adds the content to
+	 * bootargs. This is needed to specify root and other boot flags.
+	 */
+	chosen = finddevice("/chosen");
+	node = fdt_path_offset(fw_dtb, "/chosen");
+	bootargs = fdt_getprop(fw_dtb, node, "bootargs", &size);
+	setprop_str(chosen, "bootargs", bootargs);
+}
+
+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+		   unsigned long r6, unsigned long r7)
+{
+	const u32 *reg;
+	int node, size;
+
+	fw_dtb = (const void *)r3;
+	
+	/* Find the memory range. */
+	node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "memory", sizeof("memory"));
+	reg = fdt_getprop(fw_dtb, node, "reg", &size);
+	memsize64 = reg[1];
+
+	/* Now we have the memory size; initialize the heap. */
+	simple_alloc_init(_end, memsize64 - (unsigned long)_end, 32, 64);
+
+	/* Prepare the device tree and find the console. */
+	fdt_init(_dtb_start);
+	serial_console_init();
+
+	/* Remaining fixups... */
+	platform_ops.fixups = rb600_fixups;
+}