arch/powerpc/platforms/maple/setup.c

   1 /*
   2  *  Maple (970 eval board) setup code
   3  *
   4  *  (c) Copyright 2004 Benjamin Herrenschmidt (benh@kernel.crashing.org),
   5  *                     IBM Corp.
   6  *
   7  *  This program is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU General Public License
   9  *  as published by the Free Software Foundation; either version
  10  *  2 of the License, or (at your option) any later version.
  11  *
  12  */
  13
  14 #define DEBUG
  15
  16 #include <linux/config.h>
  17 #include <linux/init.h>
  18 #include <linux/errno.h>
  19 #include <linux/sched.h>
  20 #include <linux/kernel.h>
  21 #include <linux/mm.h>
  22 #include <linux/stddef.h>
  23 #include <linux/unistd.h>
  24 #include <linux/ptrace.h>
  25 #include <linux/slab.h>
  26 #include <linux/user.h>
  27 #include <linux/a.out.h>
  28 #include <linux/tty.h>
  29 #include <linux/string.h>
  30 #include <linux/delay.h>
  31 #include <linux/ioport.h>
  32 #include <linux/major.h>
  33 #include <linux/initrd.h>
  34 #include <linux/vt_kern.h>
  35 #include <linux/console.h>
  36 #include <linux/ide.h>
  37 #include <linux/pci.h>
  38 #include <linux/adb.h>
  39 #include <linux/cuda.h>
  40 #include <linux/pmu.h>
  41 #include <linux/irq.h>
  42 #include <linux/seq_file.h>
  43 #include <linux/root_dev.h>
  44 #include <linux/serial.h>
  45 #include <linux/smp.h>
  46
  47 #include <asm/processor.h>
  48 #include <asm/sections.h>
  49 #include <asm/prom.h>
  50 #include <asm/system.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/bitops.h>
  53 #include <asm/io.h>
  54 #include <asm/kexec.h>
  55 #include <asm/pci-bridge.h>
  56 #include <asm/iommu.h>
  57 #include <asm/machdep.h>
  58 #include <asm/dma.h>
  59 #include <asm/cputable.h>
  60 #include <asm/time.h>
  61 #include <asm/of_device.h>
  62 #include <asm/lmb.h>
  63 #include <asm/mpic.h>
  64 #include <asm/udbg.h>
  65
  66 #include "maple.h"
  67
  68 #ifdef DEBUG
  69 #define DBG(fmt...) udbg_printf(fmt)
  70 #else
  71 #define DBG(fmt...)
  72 #endif
  73
  74 static void maple_restart(char *cmd)
  75 {
  76         unsigned int maple_nvram_base;
  77         unsigned int maple_nvram_offset;
  78         unsigned int maple_nvram_command;
  79         struct device_node *rtcs;
  80
  81         /* find NVRAM device */
  82         rtcs = find_compatible_devices("nvram", "AMD8111");
  83         if (rtcs && rtcs->addrs) {
  84                 maple_nvram_base = rtcs->addrs[0].address;
  85         } else {
  86                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  87                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  88                 return;
  89         }
  90
  91         /* find service processor device */
  92         rtcs = find_devices("service-processor");
  93         if (!rtcs) {
  94                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
  95                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  96                 return;
  97         }
  98         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
  99                         "restart-addr", NULL);
 100         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 101                         "restart-value", NULL);
 102
 103         /* send command */
 104         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 105         for (;;) ;
 106 }
 107
 108 static void maple_power_off(void)
 109 {
 110         unsigned int maple_nvram_base;
 111         unsigned int maple_nvram_offset;
 112         unsigned int maple_nvram_command;
 113         struct device_node *rtcs;
 114
 115         /* find NVRAM device */
 116         rtcs = find_compatible_devices("nvram", "AMD8111");
 117         if (rtcs && rtcs->addrs) {
 118                 maple_nvram_base = rtcs->addrs[0].address;
 119         } else {
 120                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 121                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 122                 return;
 123         }
 124
 125         /* find service processor device */
 126         rtcs = find_devices("service-processor");
 127         if (!rtcs) {
 128                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 129                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 130                 return;
 131         }
 132         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 133                         "power-off-addr", NULL);
 134         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 135                         "power-off-value", NULL);
 136
 137         /* send command */
 138         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 139         for (;;) ;
 140 }
 141
 142 static void maple_halt(void)
 143 {
 144         maple_power_off();
 145 }
 146
 147 #ifdef CONFIG_SMP
 148 struct smp_ops_t maple_smp_ops = {
 149         .probe          = smp_mpic_probe,
 150         .message_pass   = smp_mpic_message_pass,
 151         .kick_cpu       = smp_generic_kick_cpu,
 152         .setup_cpu      = smp_mpic_setup_cpu,
 153         .give_timebase  = smp_generic_give_timebase,
 154         .take_timebase  = smp_generic_take_timebase,
 155 };
 156 #endif /* CONFIG_SMP */
 157
 158 void __init maple_setup_arch(void)
 159 {
 160         /* init to some ~sane value until calibrate_delay() runs */
 161         loops_per_jiffy = 50000000;
 162
 163         /* Setup SMP callback */
 164 #ifdef CONFIG_SMP
 165         smp_ops = &maple_smp_ops;
 166 #endif
 167         /* Lookup PCI hosts */
 168         maple_pci_init();
 169
 170 #ifdef CONFIG_DUMMY_CONSOLE
 171         conswitchp = &dummy_con;
 172 #endif
 173
 174         printk(KERN_INFO "Using native/NAP idle loop\n");
 175 }
 176
 177 /*
 178  * Early initialization.
 179  */
 180 static void __init maple_init_early(void)
 181 {
 182         unsigned int default_speed;
 183         u64 physport;
 184
 185         DBG(" -> maple_init_early\n");
 186
 187         /* Initialize hash table, from now on, we can take hash faults
 188          * and call ioremap
 189          */
 190         hpte_init_native();
 191
 192         /* Setup interrupt mapping options */
 193         ppc64_interrupt_controller = IC_OPEN_PIC;
 194
 195         iommu_init_early_dart();
 196
 197         DBG(" <- maple_init_early\n");
 198 }
 199
 200
 201 static __init void maple_init_IRQ(void)
 202 {
 203         struct device_node *root;
 204         unsigned int *opprop;
 205         unsigned long opic_addr;
 206         struct mpic *mpic;
 207         unsigned char senses[128];
 208         int n;
 209
 210         DBG(" -> maple_init_IRQ\n");
 211
 212         /* XXX: Non standard, replace that with a proper openpic/mpic node
 213          * in the device-tree. Find the Open PIC if present */
 214         root = of_find_node_by_path("/");
 215         opprop = (unsigned int *) get_property(root,
 216                                 "platform-open-pic", NULL);
 217         if (opprop == 0)
 218                 panic("OpenPIC not found !\n");
 219
 220         n = prom_n_addr_cells(root);
 221         for (opic_addr = 0; n > 0; --n)
 222                 opic_addr = (opic_addr << 32) + *opprop++;
 223         of_node_put(root);
 224
 225         /* Obtain sense values from device-tree */
 226         prom_get_irq_senses(senses, 0, 128);
 227
 228         mpic = mpic_alloc(opic_addr,
 229                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 230                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 231                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 232         BUG_ON(mpic == NULL);
 233         mpic_init(mpic);
 234
 235         DBG(" <- maple_init_IRQ\n");
 236 }
 237
 238 static void __init maple_progress(char *s, unsigned short hex)
 239 {
 240         printk("*** %04x : %s\n", hex, s ? s : "");
 241 }
 242
 243
 244 /*
 245  * Called very early, MMU is off, device-tree isn't unflattened
 246  */
 247 static int __init maple_probe(int platform)
 248 {
 249         if (platform != PLATFORM_MAPLE)
 250                 return 0;
 251         /*
 252          * On U3, the DART (iommu) must be allocated now since it
 253          * has an impact on htab_initialize (due to the large page it
 254          * occupies having to be broken up so the DART itself is not
 255          * part of the cacheable linar mapping
 256          */
 257         alloc_dart_table();
 258
 259         return 1;
 260 }
 261
 262 struct machdep_calls __initdata maple_md = {
 263         .probe                  = maple_probe,
 264         .setup_arch             = maple_setup_arch,
 265         .init_early             = maple_init_early,
 266         .init_IRQ               = maple_init_IRQ,
 267         .get_irq                = mpic_get_irq,
 268         .pcibios_fixup          = maple_pcibios_fixup,
 269         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 270         .restart                = maple_restart,
 271         .power_off              = maple_power_off,
 272         .halt                   = maple_halt,
 273         .get_boot_time          = maple_get_boot_time,
 274         .set_rtc_time           = maple_set_rtc_time,
 275         .get_rtc_time           = maple_get_rtc_time,
 276         .calibrate_decr         = generic_calibrate_decr,
 277         .progress               = maple_progress,
 278         .idle_loop              = native_idle,
 279 #ifdef CONFIG_KEXEC
 280         .machine_kexec          = default_machine_kexec,
 281         .machine_kexec_prepare  = default_machine_kexec_prepare,
 282         .machine_crash_shutdown = default_machine_crash_shutdown,
 283 #endif
 284 };