patch-2.4.20 linux-2.4.20/arch/ppc/kernel/walnut_setup.c
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- Lines: 293
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.19/arch/ppc/kernel/walnut_setup.c
- Orig date:
Fri Nov 16 10:10:08 2001
diff -urN linux-2.4.19/arch/ppc/kernel/walnut_setup.c linux-2.4.20/arch/ppc/kernel/walnut_setup.c
@@ -1,292 +0,0 @@
-/*
- * BK Id: SCCS/s.walnut_setup.c 1.10 11/13/01 21:26:07 paulus
- */
-/*
- *
- * Copyright (c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
- *
- * Module name: walnut_setup.c
- *
- * Description:
- * Architecture- / platform-specific boot-time initialization code for
- * the IBM PowerPC 403GP "Walnut" 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/interrupt.h>
-#include <linux/param.h>
-#include <linux/string.h>
-#include <linux/blk.h>
-#include <linux/seq_file.h>
-
-#include <asm/processor.h>
-#include <asm/board.h>
-#include <asm/machdep.h>
-#include <asm/page.h>
-
-#include "local_irq.h"
-#include "ppc4xx_pic.h"
-#include <asm/time.h>
-#include "walnut_setup.h"
-
-
-/* Function Prototypes */
-
-extern void abort(void);
-
-/* Global Variables */
-
-unsigned char __res[sizeof(bd_t)];
-
-
-/*
- * void __init walnut_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
-walnut_init(unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7)
-{
- /*
- * 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 = walnut_setup_arch;
- ppc_md.show_percpuinfo = walnut_show_percpuinfo;
- ppc_md.irq_cannonicalize = NULL;
- ppc_md.init_IRQ = walnut_init_IRQ;
- ppc_md.get_irq = walnut_get_irq;
- ppc_md.init = NULL;
-
- ppc_md.restart = walnut_restart;
- ppc_md.power_off = walnut_power_off;
- ppc_md.halt = walnut_halt;
-
- ppc_md.time_init = walnut_time_init;
- ppc_md.set_rtc_time = walnut_set_rtc_time;
- ppc_md.get_rtc_time = walnut_get_rtc_time;
- ppc_md.calibrate_decr = walnut_calibrate_decr;
-
- ppc_md.kbd_setkeycode = NULL;
- ppc_md.kbd_getkeycode = NULL;
- ppc_md.kbd_translate = NULL;
- ppc_md.kbd_unexpected_up = NULL;
- ppc_md.kbd_leds = NULL;
- ppc_md.kbd_init_hw = NULL;
- ppc_md.ppc_kbd_sysrq_xlate = NULL;
-}
-
-/*
- * Document me.
- */
-void __init
-walnut_setup_arch(void)
-{
- /* XXX - Implement me */
-}
-
-/*
- * int walnut_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
-walnut_show_percpuinfo(struct seq_file *m)
-{
- 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 __init
-walnut_init_IRQ(void)
-{
- int i;
-
- ppc4xx_pic_init();
-
- for (i = 0; i < NR_IRQS; i++) {
- irq_desc[i].handler = ppc4xx_pic;
- }
-
- return;
-}
-
-/*
- * Document me.
- */
-int
-walnut_get_irq(struct pt_regs *regs)
-{
- return (ppc4xx_pic_get_irq(regs));
-}
-
-/*
- * Document me.
- */
-void
-walnut_restart(char *cmd)
-{
- abort();
-}
-
-/*
- * Document me.
- */
-void
-walnut_power_off(void)
-{
- walnut_restart(NULL);
-}
-
-/*
- * Document me.
- */
-void
-walnut_halt(void)
-{
- walnut_restart(NULL);
-}
-
-/*
- * Document me.
- */
-long __init
-walnut_time_init(void)
-{
- /* XXX - Implement me */
- return 0;
-}
-
-/*
- * Document me.
- */
-int __init
-walnut_set_rtc_time(unsigned long time)
-{
- /* XXX - Implement me */
-
- return (0);
-}
-
-/*
- * Document me.
- */
-unsigned long __init
-walnut_get_rtc_time(void)
-{
- /* XXX - Implement me */
-
- return (0);
-}
-
-/*
- * void __init walnut_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
-walnut_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);
-}
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