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 unsigned long maple_find_nvram_base(void)
  75 {
  76         struct device_node *rtcs;
  77         unsigned long result = 0;
  78
  79         /* find NVRAM device */
  80         rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
  81         if (rtcs) {
  82                 struct resource r;
  83                 if (of_address_to_resource(rtcs, 0, &r)) {
  84                         printk(KERN_EMERG "Maple: Unable to translate NVRAM"
  85                                " address\n");
  86                         goto bail;
  87                 }
  88                 if (!(r.flags & IORESOURCE_IO)) {
  89                         printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
  90                         goto bail;
  91                 }
  92                 result = r.start;
  93         } else
  94                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  95  bail:
  96         of_node_put(rtcs);
  97         return result;
  98 }
  99
 100 static void maple_restart(char *cmd)
 101 {
 102         unsigned int maple_nvram_base;
 103         unsigned int maple_nvram_offset;
 104         unsigned int maple_nvram_command;
 105         struct device_node *sp;
 106
 107         maple_nvram_base = maple_find_nvram_base();
 108         if (maple_nvram_base == 0)
 109                 goto fail;
 110
 111         /* find service processor device */
 112         sp = of_find_node_by_name(NULL, "service-processor");
 113         if (!sp) {
 114                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 115                 goto fail;
 116         }
 117         maple_nvram_offset = *(unsigned int*) get_property(sp,
 118                         "restart-addr", NULL);
 119         maple_nvram_command = *(unsigned int*) get_property(sp,
 120                         "restart-value", NULL);
 121         of_node_put(sp);
 122
 123         /* send command */
 124         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 125         for (;;) ;
 126  fail:
 127         printk(KERN_EMERG "Maple: Manual Restart Required\n");
 128 }
 129
 130 static void maple_power_off(void)
 131 {
 132         unsigned int maple_nvram_base;
 133         unsigned int maple_nvram_offset;
 134         unsigned int maple_nvram_command;
 135         struct device_node *sp;
 136
 137         maple_nvram_base = maple_find_nvram_base();
 138         if (maple_nvram_base == 0)
 139                 goto fail;
 140
 141         /* find service processor device */
 142         sp = of_find_node_by_name(NULL, "service-processor");
 143         if (!sp) {
 144                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 145                 goto fail;
 146         }
 147         maple_nvram_offset = *(unsigned int*) get_property(sp,
 148                         "power-off-addr", NULL);
 149         maple_nvram_command = *(unsigned int*) get_property(sp,
 150                         "power-off-value", NULL);
 151         of_node_put(sp);
 152
 153         /* send command */
 154         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 155         for (;;) ;
 156  fail:
 157         printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 158 }
 159
 160 static void maple_halt(void)
 161 {
 162         maple_power_off();
 163 }
 164
 165 #ifdef CONFIG_SMP
 166 struct smp_ops_t maple_smp_ops = {
 167         .probe          = smp_mpic_probe,
 168         .message_pass   = smp_mpic_message_pass,
 169         .kick_cpu       = smp_generic_kick_cpu,
 170         .setup_cpu      = smp_mpic_setup_cpu,
 171         .give_timebase  = smp_generic_give_timebase,
 172         .take_timebase  = smp_generic_take_timebase,
 173 };
 174 #endif /* CONFIG_SMP */
 175
 176 void __init maple_setup_arch(void)
 177 {
 178         /* init to some ~sane value until calibrate_delay() runs */
 179         loops_per_jiffy = 50000000;
 180
 181         /* Setup SMP callback */
 182 #ifdef CONFIG_SMP
 183         smp_ops = &maple_smp_ops;
 184 #endif
 185         /* Lookup PCI hosts */
 186         maple_pci_init();
 187
 188 #ifdef CONFIG_DUMMY_CONSOLE
 189         conswitchp = &dummy_con;
 190 #endif
 191
 192         printk(KERN_INFO "Using native/NAP idle loop\n");
 193 }
 194
 195 /*
 196  * Early initialization.
 197  */
 198 static void __init maple_init_early(void)
 199 {
 200         DBG(" -> maple_init_early\n");
 201
 202         /* Initialize hash table, from now on, we can take hash faults
 203          * and call ioremap
 204          */
 205         hpte_init_native();
 206
 207         /* Setup interrupt mapping options */
 208         ppc64_interrupt_controller = IC_OPEN_PIC;
 209
 210         iommu_init_early_dart();
 211
 212         DBG(" <- maple_init_early\n");
 213 }
 214
 215
 216 static __init void maple_init_IRQ(void)
 217 {
 218         struct device_node *root;
 219         unsigned int *opprop;
 220         unsigned long opic_addr;
 221         struct mpic *mpic;
 222         unsigned char senses[128];
 223         int n;
 224
 225         DBG(" -> maple_init_IRQ\n");
 226
 227         /* XXX: Non standard, replace that with a proper openpic/mpic node
 228          * in the device-tree. Find the Open PIC if present */
 229         root = of_find_node_by_path("/");
 230         opprop = (unsigned int *) get_property(root,
 231                                 "platform-open-pic", NULL);
 232         if (opprop == 0)
 233                 panic("OpenPIC not found !\n");
 234
 235         n = prom_n_addr_cells(root);
 236         for (opic_addr = 0; n > 0; --n)
 237                 opic_addr = (opic_addr << 32) + *opprop++;
 238         of_node_put(root);
 239
 240         /* Obtain sense values from device-tree */
 241         prom_get_irq_senses(senses, 0, 128);
 242
 243         mpic = mpic_alloc(opic_addr,
 244                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 245                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 246                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 247         BUG_ON(mpic == NULL);
 248         mpic_init(mpic);
 249
 250         DBG(" <- maple_init_IRQ\n");
 251 }
 252
 253 static void __init maple_progress(char *s, unsigned short hex)
 254 {
 255         printk("*** %04x : %s\n", hex, s ? s : "");
 256 }
 257
 258
 259 /*
 260  * Called very early, MMU is off, device-tree isn't unflattened
 261  */
 262 static int __init maple_probe(void)
 263 {
 264         unsigned long root = of_get_flat_dt_root();
 265         if (!of_flat_dt_is_compatible(root, "Momentum,Maple"))
 266                 return 0;
 267         /*
 268          * On U3, the DART (iommu) must be allocated now since it
 269          * has an impact on htab_initialize (due to the large page it
 270          * occupies having to be broken up so the DART itself is not
 271          * part of the cacheable linar mapping
 272          */
 273         alloc_dart_table();
 274
 275         return 1;
 276 }
 277
 278 define_machine(maple_md) {
 279         .name                   = "Maple",
 280         .probe                  = maple_probe,
 281         .setup_arch             = maple_setup_arch,
 282         .init_early             = maple_init_early,
 283         .init_IRQ               = maple_init_IRQ,
 284         .get_irq                = mpic_get_irq,
 285         .pcibios_fixup          = maple_pcibios_fixup,
 286         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 287         .restart                = maple_restart,
 288         .power_off              = maple_power_off,
 289         .halt                   = maple_halt,
 290         .get_boot_time          = maple_get_boot_time,
 291         .set_rtc_time           = maple_set_rtc_time,
 292         .get_rtc_time           = maple_get_rtc_time,
 293         .calibrate_decr         = generic_calibrate_decr,
 294         .progress               = maple_progress,
 295         .power_save             = power4_idle,
 296 #ifdef CONFIG_KEXEC
 297         .machine_kexec          = default_machine_kexec,
 298         .machine_kexec_prepare  = default_machine_kexec_prepare,
 299         .machine_crash_shutdown = default_machine_crash_shutdown,
 300 #endif
 301 };