arch/ppc64/kernel/bpa_setup.c

   1 /*
   2  *  linux/arch/ppc/kernel/bpa_setup.c
   3  *
   4  *  Copyright (C) 1995  Linus Torvalds
   5  *  Adapted from 'alpha' version by Gary Thomas
   6  *  Modified by Cort Dougan (cort@cs.nmt.edu)
   7  *  Modified by PPC64 Team, IBM Corp
   8  *  Modified by BPA Team, IBM Deutschland Entwicklung GmbH
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version
  13  * 2 of the License, or (at your option) any later version.
  14  */
  15 #undef DEBUG
  16
  17 #include <linux/config.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/slab.h>
  24 #include <linux/user.h>
  25 #include <linux/reboot.h>
  26 #include <linux/init.h>
  27 #include <linux/delay.h>
  28 #include <linux/irq.h>
  29 #include <linux/seq_file.h>
  30 #include <linux/root_dev.h>
  31 #include <linux/console.h>
  32
  33 #include <asm/mmu.h>
  34 #include <asm/processor.h>
  35 #include <asm/io.h>
  36 #include <asm/pgtable.h>
  37 #include <asm/prom.h>
  38 #include <asm/rtas.h>
  39 #include <asm/pci-bridge.h>
  40 #include <asm/iommu.h>
  41 #include <asm/dma.h>
  42 #include <asm/machdep.h>
  43 #include <asm/time.h>
  44 #include <asm/nvram.h>
  45 #include <asm/cputable.h>
  46 #include <asm/ppc-pci.h>
  47 #include <asm/irq.h>
  48
  49 #include "bpa_iic.h"
  50 #include "bpa_iommu.h"
  51
  52 #ifdef DEBUG
  53 #define DBG(fmt...) udbg_printf(fmt)
  54 #else
  55 #define DBG(fmt...)
  56 #endif
  57
  58 void bpa_show_cpuinfo(struct seq_file *m)
  59 {
  60         struct device_node *root;
  61         const char *model = "";
  62
  63         root = of_find_node_by_path("/");
  64         if (root)
  65                 model = get_property(root, "model", NULL);
  66         seq_printf(m, "machine\t\t: BPA %s\n", model);
  67         of_node_put(root);
  68 }
  69
  70 static void bpa_progress(char *s, unsigned short hex)
  71 {
  72         printk("*** %04x : %s\n", hex, s ? s : "");
  73 }
  74
  75 static void __init bpa_setup_arch(void)
  76 {
  77         ppc_md.init_IRQ       = iic_init_IRQ;
  78         ppc_md.get_irq        = iic_get_irq;
  79
  80 #ifdef CONFIG_SMP
  81         smp_init_pSeries();
  82 #endif
  83
  84         /* init to some ~sane value until calibrate_delay() runs */
  85         loops_per_jiffy = 50000000;
  86
  87         if (ROOT_DEV == 0) {
  88                 printk("No ramdisk, default root is /dev/hda2\n");
  89                 ROOT_DEV = Root_HDA2;
  90         }
  91
  92         /* Find and initialize PCI host bridges */
  93         init_pci_config_tokens();
  94         find_and_init_phbs();
  95         spider_init_IRQ();
  96 #ifdef CONFIG_DUMMY_CONSOLE
  97         conswitchp = &dummy_con;
  98 #endif
  99
 100         bpa_nvram_init();
 101 }
 102
 103 /*
 104  * Early initialization.  Relocation is on but do not reference unbolted pages
 105  */
 106 static void __init bpa_init_early(void)
 107 {
 108         DBG(" -> bpa_init_early()\n");
 109
 110         hpte_init_native();
 111
 112         bpa_init_iommu();
 113
 114         ppc64_interrupt_controller = IC_BPA_IIC;
 115
 116         DBG(" <- bpa_init_early()\n");
 117 }
 118
 119
 120 static int __init bpa_probe(int platform)
 121 {
 122         if (platform != PLATFORM_BPA)
 123                 return 0;
 124
 125         return 1;
 126 }
 127
 128 struct machdep_calls __initdata bpa_md = {
 129         .probe                  = bpa_probe,
 130         .setup_arch             = bpa_setup_arch,
 131         .init_early             = bpa_init_early,
 132         .show_cpuinfo           = bpa_show_cpuinfo,
 133         .restart                = rtas_restart,
 134         .power_off              = rtas_power_off,
 135         .halt                   = rtas_halt,
 136         .get_boot_time          = rtas_get_boot_time,
 137         .get_rtc_time           = rtas_get_rtc_time,
 138         .set_rtc_time           = rtas_set_rtc_time,
 139         .calibrate_decr         = generic_calibrate_decr,
 140         .progress               = bpa_progress,
 141 };