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diff --git a/arch/ppc/platforms/4xx/oak.c b/arch/ppc/platforms/4xx/oak.c
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+/*
+ *
+ * Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
+ *
+ * Module name: oak.c
+ *
+ * Description:
+ * Architecture- / platform-specific boot-time initialization code for
+ * the IBM PowerPC 403GCX "Oak" evaluation board. Adapted from original
+ * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
+ * <dan@net4x.com>.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+#include <linux/threads.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/initrd.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+
+#include <asm/board.h>
+#include <asm/machdep.h>
+#include <asm/page.h>
+#include <asm/bootinfo.h>
+#include <asm/ppc4xx_pic.h>
+#include <asm/time.h>
+
+#include "oak.h"
+
+/* Function Prototypes */
+
+extern void abort(void);
+
+/* Global Variables */
+
+unsigned char __res[sizeof(bd_t)];
+
+
+/*
+ * void __init oak_init()
+ *
+ * Description:
+ * This routine...
+ *
+ * Input(s):
+ * r3 - Optional pointer to a board information structure.
+ * r4 - Optional pointer to the physical starting address of the init RAM
+ * disk.
+ * r5 - Optional pointer to the physical ending address of the init RAM
+ * disk.
+ * r6 - Optional pointer to the physical starting address of any kernel
+ * command-line parameters.
+ * r7 - Optional pointer to the physical ending address of any kernel
+ * command-line parameters.
+ *
+ * Output(s):
+ * N/A
+ *
+ * Returns:
+ * N/A
+ *
+ */
+void __init
+platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+ parse_bootinfo(find_bootinfo());
+
+ /*
+ * If we were passed in a board information, copy it into the
+ * residual data area.
+ */
+ if (r3) {
+ memcpy((void *)__res, (void *)(r3 + KERNELBASE), sizeof(bd_t));
+ }
+
+#if defined(CONFIG_BLK_DEV_INITRD)
+ /*
+ * If the init RAM disk has been configured in, and there's a valid
+ * starting address for it, set it up.
+ */
+ if (r4) {
+ initrd_start = r4 + KERNELBASE;
+ initrd_end = r5 + KERNELBASE;
+ }
+#endif /* CONFIG_BLK_DEV_INITRD */
+
+ /* Copy the kernel command line arguments to a safe place. */
+
+ if (r6) {
+ *(char *)(r7 + KERNELBASE) = 0;
+ strcpy(cmd_line, (char *)(r6 + KERNELBASE));
+ }
+
+ /* Initialize machine-dependency vectors */
+
+ ppc_md.setup_arch = oak_setup_arch;
+ ppc_md.show_percpuinfo = oak_show_percpuinfo;
+ ppc_md.irq_canonicalize = NULL;
+ ppc_md.init_IRQ = ppc4xx_pic_init;
+ ppc_md.get_irq = NULL; /* Set in ppc4xx_pic_init() */
+ ppc_md.init = NULL;
+
+ ppc_md.restart = oak_restart;
+ ppc_md.power_off = oak_power_off;
+ ppc_md.halt = oak_halt;
+
+ ppc_md.time_init = oak_time_init;
+ ppc_md.set_rtc_time = oak_set_rtc_time;
+ ppc_md.get_rtc_time = oak_get_rtc_time;
+ ppc_md.calibrate_decr = oak_calibrate_decr;
+}
+
+/*
+ * Document me.
+ */
+void __init
+oak_setup_arch(void)
+{
+ /* XXX - Implement me */
+}
+
+/*
+ * int oak_show_percpuinfo()
+ *
+ * Description:
+ * This routine pretty-prints the platform's internal CPU and bus clock
+ * frequencies into the buffer for usage in /proc/cpuinfo.
+ *
+ * Input(s):
+ * *buffer - Buffer into which CPU and bus clock frequencies are to be
+ * printed.
+ *
+ * Output(s):
+ * *buffer - Buffer with the CPU and bus clock frequencies.
+ *
+ * Returns:
+ * The number of bytes copied into 'buffer' if OK, otherwise zero or less
+ * on error.
+ */
+int
+oak_show_percpuinfo(struct seq_file *m, int i)
+{
+ bd_t *bp = (bd_t *)__res;
+
+ seq_printf(m, "clock\t\t: %dMHz\n"
+ "bus clock\t\t: %dMHz\n",
+ bp->bi_intfreq / 1000000,
+ bp->bi_busfreq / 1000000);
+
+ return 0;
+}
+
+/*
+ * Document me.
+ */
+void
+oak_restart(char *cmd)
+{
+ abort();
+}
+
+/*
+ * Document me.
+ */
+void
+oak_power_off(void)
+{
+ oak_restart(NULL);
+}
+
+/*
+ * Document me.
+ */
+void
+oak_halt(void)
+{
+ oak_restart(NULL);
+}
+
+/*
+ * Document me.
+ */
+long __init
+oak_time_init(void)
+{
+ /* XXX - Implement me */
+ return 0;
+}
+
+/*
+ * Document me.
+ */
+int __init
+oak_set_rtc_time(unsigned long time)
+{
+ /* XXX - Implement me */
+
+ return (0);
+}
+
+/*
+ * Document me.
+ */
+unsigned long __init
+oak_get_rtc_time(void)
+{
+ /* XXX - Implement me */
+
+ return (0);
+}
+
+/*
+ * void __init oak_calibrate_decr()
+ *
+ * Description:
+ * This routine retrieves the internal processor frequency from the board
+ * information structure, sets up the kernel timer decrementer based on
+ * that value, enables the 403 programmable interval timer (PIT) and sets
+ * it up for auto-reload.
+ *
+ * Input(s):
+ * N/A
+ *
+ * Output(s):
+ * N/A
+ *
+ * Returns:
+ * N/A
+ *
+ */
+void __init
+oak_calibrate_decr(void)
+{
+ unsigned int freq;
+ bd_t *bip = (bd_t *)__res;
+
+ freq = bip->bi_intfreq;
+
+ decrementer_count = freq / HZ;
+ count_period_num = 1;
+ count_period_den = freq;
+
+ /* Enable the PIT and set auto-reload of its value */
+
+ mtspr(SPRN_TCR, TCR_PIE | TCR_ARE);
+
+ /* Clear any pending timer interrupts */
+
+ mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_PIS | TSR_FIS);
+}