arch/powerpc/platforms/celleb/setup.c

   1 /*
   2  * Celleb setup code
   3  *
   4  * (C) Copyright 2006-2007 TOSHIBA CORPORATION
   5  *
   6  * This code is based on arch/powerpc/platforms/cell/setup.c:
   7  *  Copyright (C) 1995  Linus Torvalds
   8  *  Adapted from 'alpha' version by Gary Thomas
   9  *  Modified by Cort Dougan (cort@cs.nmt.edu)
  10  *  Modified by PPC64 Team, IBM Corp
  11  *  Modified by Cell Team, IBM Deutschland Entwicklung GmbH
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License along
  24  * with this program; if not, write to the Free Software Foundation, Inc.,
  25  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  26  */
  27
  28 #undef DEBUG
  29
  30 #include <linux/cpu.h>
  31 #include <linux/sched.h>
  32 #include <linux/kernel.h>
  33 #include <linux/mm.h>
  34 #include <linux/stddef.h>
  35 #include <linux/unistd.h>
  36 #include <linux/reboot.h>
  37 #include <linux/init.h>
  38 #include <linux/delay.h>
  39 #include <linux/irq.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/root_dev.h>
  42 #include <linux/console.h>
  43
  44 #include <asm/mmu.h>
  45 #include <asm/processor.h>
  46 #include <asm/io.h>
  47 #include <asm/kexec.h>
  48 #include <asm/prom.h>
  49 #include <asm/machdep.h>
  50 #include <asm/cputable.h>
  51 #include <asm/irq.h>
  52 #include <asm/spu_priv1.h>
  53 #include <asm/firmware.h>
  54 #include <asm/of_platform.h>
  55
  56 #include "interrupt.h"
  57 #include "beat_wrapper.h"
  58 #include "beat.h"
  59 #include "pci.h"
  60
  61 static char celleb_machine_type[128] = "Celleb";
  62
  63 static void celleb_show_cpuinfo(struct seq_file *m)
  64 {
  65         struct device_node *root;
  66         const char *model = "";
  67
  68         root = of_find_node_by_path("/");
  69         if (root)
  70                 model = get_property(root, "model", NULL);
  71         /* using "CHRP" is to trick anaconda into installing FCx into Celleb */
  72         seq_printf(m, "machine\t\t: %s %s\n", celleb_machine_type, model);
  73         of_node_put(root);
  74 }
  75
  76 static int celleb_machine_type_hack(char *ptr)
  77 {
  78         strncpy(celleb_machine_type, ptr, sizeof(celleb_machine_type));
  79         celleb_machine_type[sizeof(celleb_machine_type)-1] = 0;
  80         return 0;
  81 }
  82
  83 __setup("celleb_machine_type_hack", celleb_machine_type_hack);
  84
  85 static void celleb_progress(char *s, unsigned short hex)
  86 {
  87         printk("*** %04x : %s\n", hex, s ? s : "");
  88 }
  89
  90 static void __init celleb_setup_arch(void)
  91 {
  92 #ifdef CONFIG_SPU_BASE
  93         spu_priv1_ops = &spu_priv1_beat_ops;
  94         spu_management_ops = &spu_management_of_ops;
  95 #endif
  96
  97 #ifdef CONFIG_SMP
  98         smp_init_celleb();
  99 #endif
 100
 101         /* init to some ~sane value until calibrate_delay() runs */
 102         loops_per_jiffy = 50000000;
 103
 104         if (ROOT_DEV == 0) {
 105                 printk("No ramdisk, default root is /dev/hda2\n");
 106                 ROOT_DEV = Root_HDA2;
 107         }
 108
 109 #ifdef CONFIG_DUMMY_CONSOLE
 110         conswitchp = &dummy_con;
 111 #endif
 112 }
 113
 114 static void beat_power_save(void)
 115 {
 116         beat_pause(0);
 117 }
 118
 119 static int __init celleb_probe(void)
 120 {
 121         unsigned long root = of_get_flat_dt_root();
 122
 123         if (!of_flat_dt_is_compatible(root, "Beat"))
 124                 return 0;
 125
 126         powerpc_firmware_features |= FW_FEATURE_CELLEB_POSSIBLE;
 127         hpte_init_beat();
 128         return 1;
 129 }
 130
 131 /*
 132  * Cell has no legacy IO; anything calling this function has to
 133  * fail or bad things will happen
 134  */
 135 static int celleb_check_legacy_ioport(unsigned int baseport)
 136 {
 137         return -ENODEV;
 138 }
 139
 140 #ifdef CONFIG_KEXEC
 141 static void celleb_kexec_cpu_down(int crash, int secondary)
 142 {
 143         beatic_deinit_IRQ();
 144 }
 145 #endif
 146
 147 static struct of_device_id celleb_bus_ids[] = {
 148         { .type = "scc", },
 149         { .type = "ioif", },    /* old style */
 150         {},
 151 };
 152
 153 static int __init celleb_publish_devices(void)
 154 {
 155         if (!machine_is(celleb))
 156                 return 0;
 157
 158         /* Publish OF platform devices for southbridge IOs */
 159         of_platform_bus_probe(NULL, celleb_bus_ids, NULL);
 160
 161         return 0;
 162 }
 163 device_initcall(celleb_publish_devices);
 164
 165 define_machine(celleb) {
 166         .name                   = "Cell Reference Set",
 167         .probe                  = celleb_probe,
 168         .setup_arch             = celleb_setup_arch,
 169         .show_cpuinfo           = celleb_show_cpuinfo,
 170         .restart                = beat_restart,
 171         .power_off              = beat_power_off,
 172         .halt                   = beat_halt,
 173         .get_rtc_time           = beat_get_rtc_time,
 174         .set_rtc_time           = beat_set_rtc_time,
 175         .calibrate_decr         = generic_calibrate_decr,
 176         .check_legacy_ioport    = celleb_check_legacy_ioport,
 177         .progress               = celleb_progress,
 178         .power_save             = beat_power_save,
 179         .nvram_size             = beat_nvram_get_size,
 180         .nvram_read             = beat_nvram_read,
 181         .nvram_write            = beat_nvram_write,
 182         .set_dabr               = beat_set_xdabr,
 183         .init_IRQ               = beatic_init_IRQ,
 184         .get_irq                = beatic_get_irq,
 185         .pci_probe_mode         = celleb_pci_probe_mode,
 186         .pci_setup_phb          = celleb_setup_phb,
 187 #ifdef CONFIG_KEXEC
 188         .kexec_cpu_down         = celleb_kexec_cpu_down,
 189         .machine_kexec          = default_machine_kexec,
 190         .machine_kexec_prepare  = default_machine_kexec_prepare,
 191         .machine_crash_shutdown = default_machine_crash_shutdown,
 192 #endif
 193 };