arch/ppc/kernel/mbx_setup.c

   1 /*
   2  * $Id: mbx_setup.c,v 1.4 1998/11/15 19:58:55 cort Exp $
   3  *
   4  *  linux/arch/ppc/kernel/setup.c
   5  *
   6  *  Copyright (C) 1995  Linus Torvalds
   7  *  Adapted from 'alpha' version by Gary Thomas
   8  *  Modified by Cort Dougan (cort@cs.nmt.edu)
   9  *  Modified for MBX using prep/chrp/pmac functions by Dan (dmalek@jlc.net)
  10  */
  11
  12 /*
  13  * bootup setup stuff..
  14  */
  15
  16 #include <linux/config.h>
  17 #include <linux/errno.h>
  18 #include <linux/sched.h>
  19 #include <linux/kernel.h>
  20 #include <linux/mm.h>
  21 #include <linux/stddef.h>
  22 #include <linux/unistd.h>
  23 #include <linux/ptrace.h>
  24 #include <linux/malloc.h>
  25 #include <linux/user.h>
  26 #include <linux/a.out.h>
  27 #include <linux/tty.h>
  28 #include <linux/major.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/reboot.h>
  31 #include <linux/init.h>
  32 #include <linux/blk.h>
  33 #include <linux/ioport.h>
  34
  35 #include <asm/mmu.h>
  36 #include <asm/processor.h>
  37 #include <asm/residual.h>
  38 #include <asm/io.h>
  39 #include <asm/pgtable.h>
  40 #include <asm/ide.h>
  41 #include <asm/mbx.h>
  42
  43 extern unsigned long loops_per_sec;
  44
  45 unsigned long empty_zero_page[1024];
  46
  47 #ifdef CONFIG_BLK_DEV_RAM
  48 extern int rd_doload;           /* 1 = load ramdisk, 0 = don't load */
  49 extern int rd_prompt;           /* 1 = prompt for ramdisk, 0 = don't prompt */
  50 extern int rd_image_start;      /* starting block # of image */
  51 #endif
  52
  53 extern char saved_command_line[256];
  54
  55 extern unsigned long find_available_memory(void);
  56 extern void m8xx_cpm_reset(uint);
  57
  58 /* this really does make things cleaner -- Cort */
  59 void __init powermac_init(void)
  60 {
  61 }
  62 void __init adbdev_init(void)
  63 {
  64 }
  65
  66 void __init mbx_ide_init_hwif_ports(ide_ioreg_t *p, ide_ioreg_t base, int *irq)
  67 {
  68
  69         *p = 0;
  70         *irq = 0;
  71
  72         if (base != 0)          /* Only map the first ATA flash drive */
  73                 return;
  74 #ifdef ATA_FLASH
  75         base = (unsigned long) ioremap(PCMCIA_MEM_ADDR, 0x200);
  76         for (i = 0; i < 8; ++i)
  77                 *p++ = base++;
  78         *p = ++base;            /* Does not matter */
  79         if (irq)
  80                 *irq = 13;
  81 #endif
  82 }
  83
  84 __initfunc(void
  85 mbx_setup_arch(unsigned long * memory_start_p, unsigned long * memory_end_p))
  86 {
  87         int     cpm_page;
  88         extern char cmd_line[];
  89
  90         cpm_page = *memory_start_p;
  91         *memory_start_p += PAGE_SIZE;
  92
  93         sprintf(cmd_line,
  94 "%s root=/dev/nfs nfsroot=/sys/mbxroot",
  95                 cmd_line);
  96         printk("Boot arguments: %s\n", cmd_line);
  97
  98         /* Reset the Communication Processor Module.
  99         */
 100         m8xx_cpm_reset(cpm_page);
 101
 102 #ifdef notdef
 103         ROOT_DEV = to_kdev_t(0x0301); /* hda1 */
 104 #endif
 105
 106 #ifdef CONFIG_BLK_DEV_INITRD
 107 #if 0
 108         ROOT_DEV = to_kdev_t(0x0200); /* floppy */
 109         rd_prompt = 1;
 110         rd_doload = 1;
 111         rd_image_start = 0;
 112 #endif
 113         /* initrd_start and size are setup by boot/head.S and kernel/head.S */
 114         if ( initrd_start )
 115         {
 116                 if (initrd_end > *memory_end_p)
 117                 {
 118                         printk("initrd extends beyond end of memory "
 119                                "(0x%08lx > 0x%08lx)\ndisabling initrd\n",
 120                                initrd_end,*memory_end_p);
 121                         initrd_start = 0;
 122                 }
 123         }
 124 #endif
 125
 126 #ifdef notdef
 127         request_region(0x20,0x20,"pic1");
 128         request_region(0xa0,0x20,"pic2");
 129         request_region(0x00,0x20,"dma1");
 130         request_region(0x40,0x20,"timer");
 131         request_region(0x80,0x10,"dma page reg");
 132         request_region(0xc0,0x20,"dma2");
 133 #endif
 134 }
 135
 136 void
 137 abort(void)
 138 {
 139 #ifdef CONFIG_XMON
 140         extern void xmon(void *);
 141         xmon(0);
 142 #endif
 143         machine_restart(NULL);
 144 }