77 lines
2.2 KiB
Diff
77 lines
2.2 KiB
Diff
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--- /dev/null
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+++ b/arch/powerpc/boot/rb333.c
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@@ -0,0 +1,73 @@
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+/*
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+ * The RouterBOARD platform -- for booting RB333 RouterBOARDs.
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+ *
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+ * Author: Alexandros C. Couloumbis <alex@ozo.com>
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+ * Author: Michael Guntsche <mike@it-loops.com>
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+ *
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+ * Copyright (c) 2010 Alexandros C. Couloumbis
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+ * Copyright (c) 2009 Michael Guntsche
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published
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+ * by the Free Software Foundation.
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+ */
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+
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+#include "ops.h"
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+#include "types.h"
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+#include "io.h"
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+#include "stdio.h"
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+#include <libfdt.h>
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+
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+BSS_STACK(4*1024);
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+
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+u64 memsize64;
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+const void *fw_dtb;
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+
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+static void rb333_fixups(void)
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+{
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+ const u32 *reg, *timebase, *clock;
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+ int node, size;
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+ void *chosen;
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+ const char* bootargs;
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+
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+ dt_fixup_memory(0, memsize64);
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+
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+ /* Find the CPU timebase and clock frequencies. */
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+ node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "cpu", sizeof("cpu"));
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+ timebase = fdt_getprop(fw_dtb, node, "timebase-frequency", &size);
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+ clock = fdt_getprop(fw_dtb, node, "clock-frequency", &size);
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+ dt_fixup_cpu_clocks(*clock, *timebase, 0);
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+
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+ /* Fixup chosen
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+ * The bootloader reads the kernelparm segment and adds the content to
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+ * bootargs. This is needed to specify root and other boot flags.
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+ */
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+ chosen = finddevice("/chosen");
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+ node = fdt_path_offset(fw_dtb, "/chosen");
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+ bootargs = fdt_getprop(fw_dtb, node, "bootargs", &size);
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+ setprop_str(chosen, "bootargs", bootargs);
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+}
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+
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+void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
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+ unsigned long r6, unsigned long r7)
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+{
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+ const u32 *reg;
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+ int node, size;
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+
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+ fw_dtb = (const void *)r3;
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+
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+ /* Find the memory range. */
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+ node = fdt_node_offset_by_prop_value(fw_dtb, -1, "device_type", "memory", sizeof("memory"));
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+ reg = fdt_getprop(fw_dtb, node, "reg", &size);
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+ memsize64 = reg[1];
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+
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+ /* Now we have the memory size; initialize the heap. */
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+ simple_alloc_init(_end, memsize64 - (unsigned long)_end, 32, 64);
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+
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+ /* Prepare the device tree and find the console. */
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+ fdt_init(_dtb_start);
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+ serial_console_init();
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+
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+ /* Remaining fixups... */
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+ platform_ops.fixups = rb333_fixups;
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+}
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