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/init.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/slab.h>
  25 #include <linux/user.h>
  26 #include <linux/a.out.h>
  27 #include <linux/tty.h>
  28 #include <linux/string.h>
  29 #include <linux/delay.h>
  30 #include <linux/ioport.h>
  31 #include <linux/major.h>
  32 #include <linux/initrd.h>
  33 #include <linux/vt_kern.h>
  34 #include <linux/console.h>
  35 #include <linux/ide.h>
  36 #include <linux/pci.h>
  37 #include <linux/adb.h>
  38 #include <linux/cuda.h>
  39 #include <linux/pmu.h>
  40 #include <linux/irq.h>
  41 #include <linux/seq_file.h>
  42 #include <linux/root_dev.h>
  43 #include <linux/serial.h>
  44 #include <linux/smp.h>
  45
  46 #include <asm/processor.h>
  47 #include <asm/sections.h>
  48 #include <asm/prom.h>
  49 #include <asm/system.h>
  50 #include <asm/pgtable.h>
  51 #include <asm/bitops.h>
  52 #include <asm/io.h>
  53 #include <asm/kexec.h>
  54 #include <asm/pci-bridge.h>
  55 #include <asm/iommu.h>
  56 #include <asm/machdep.h>
  57 #include <asm/dma.h>
  58 #include <asm/cputable.h>
  59 #include <asm/time.h>
  60 #include <asm/of_device.h>
  61 #include <asm/lmb.h>
  62 #include <asm/mpic.h>
  63 #include <asm/udbg.h>
  64
  65 #include "maple.h"
  66
  67 #ifdef DEBUG
  68 #define DBG(fmt...) udbg_printf(fmt)
  69 #else
  70 #define DBG(fmt...)
  71 #endif
  72
  73 static unsigned long maple_find_nvram_base(void)
  74 {
  75         struct device_node *rtcs;
  76         unsigned long result = 0;
  77
  78         /* find NVRAM device */
  79         rtcs = of_find_compatible_node(NULL, "nvram", "AMD8111");
  80         if (rtcs) {
  81                 struct resource r;
  82                 if (of_address_to_resource(rtcs, 0, &r)) {
  83                         printk(KERN_EMERG "Maple: Unable to translate NVRAM"
  84                                " address\n");
  85                         goto bail;
  86                 }
  87                 if (!(r.flags & IORESOURCE_IO)) {
  88                         printk(KERN_EMERG "Maple: NVRAM address isn't PIO!\n");
  89                         goto bail;
  90                 }
  91                 result = r.start;
  92         } else
  93                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  94  bail:
  95         of_node_put(rtcs);
  96         return result;
  97 }
  98
  99 static void maple_restart(char *cmd)
 100 {
 101         unsigned int maple_nvram_base;
 102         unsigned int maple_nvram_offset;
 103         unsigned int maple_nvram_command;
 104         struct device_node *sp;
 105
 106         maple_nvram_base = maple_find_nvram_base();
 107         if (maple_nvram_base == 0)
 108                 goto fail;
 109
 110         /* find service processor device */
 111         sp = of_find_node_by_name(NULL, "service-processor");
 112         if (!sp) {
 113                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 114                 goto fail;
 115         }
 116         maple_nvram_offset = *(unsigned int*) get_property(sp,
 117                         "restart-addr", NULL);
 118         maple_nvram_command = *(unsigned int*) get_property(sp,
 119                         "restart-value", NULL);
 120         of_node_put(sp);
 121
 122         /* send command */
 123         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 124         for (;;) ;
 125  fail:
 126         printk(KERN_EMERG "Maple: Manual Restart Required\n");
 127 }
 128
 129 static void maple_power_off(void)
 130 {
 131         unsigned int maple_nvram_base;
 132         unsigned int maple_nvram_offset;
 133         unsigned int maple_nvram_command;
 134         struct device_node *sp;
 135
 136         maple_nvram_base = maple_find_nvram_base();
 137         if (maple_nvram_base == 0)
 138                 goto fail;
 139
 140         /* find service processor device */
 141         sp = of_find_node_by_name(NULL, "service-processor");
 142         if (!sp) {
 143                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 144                 goto fail;
 145         }
 146         maple_nvram_offset = *(unsigned int*) get_property(sp,
 147                         "power-off-addr", NULL);
 148         maple_nvram_command = *(unsigned int*) get_property(sp,
 149                         "power-off-value", NULL);
 150         of_node_put(sp);
 151
 152         /* send command */
 153         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 154         for (;;) ;
 155  fail:
 156         printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 157 }
 158
 159 static void maple_halt(void)
 160 {
 161         maple_power_off();
 162 }
 163
 164 #ifdef CONFIG_SMP
 165 struct smp_ops_t maple_smp_ops = {
 166         .probe          = smp_mpic_probe,
 167         .message_pass   = smp_mpic_message_pass,
 168         .kick_cpu       = smp_generic_kick_cpu,
 169         .setup_cpu      = smp_mpic_setup_cpu,
 170         .give_timebase  = smp_generic_give_timebase,
 171         .take_timebase  = smp_generic_take_timebase,
 172 };
 173 #endif /* CONFIG_SMP */
 174
 175 void __init maple_setup_arch(void)
 176 {
 177         /* init to some ~sane value until calibrate_delay() runs */
 178         loops_per_jiffy = 50000000;
 179
 180         /* Setup SMP callback */
 181 #ifdef CONFIG_SMP
 182         smp_ops = &maple_smp_ops;
 183 #endif
 184         /* Lookup PCI hosts */
 185         maple_pci_init();
 186
 187 #ifdef CONFIG_DUMMY_CONSOLE
 188         conswitchp = &dummy_con;
 189 #endif
 190
 191         printk(KERN_DEBUG "Using native/NAP idle loop\n");
 192 }
 193
 194 /*
 195  * Early initialization.
 196  */
 197 static void __init maple_init_early(void)
 198 {
 199         DBG(" -> maple_init_early\n");
 200
 201         /* Setup interrupt mapping options */
 202         ppc64_interrupt_controller = IC_OPEN_PIC;
 203
 204         iommu_init_early_dart();
 205
 206         DBG(" <- maple_init_early\n");
 207 }
 208
 209
 210 static __init void maple_init_IRQ(void)
 211 {
 212         struct device_node *root;
 213         unsigned int *opprop;
 214         unsigned long opic_addr;
 215         struct mpic *mpic;
 216         unsigned char senses[128];
 217         int n;
 218
 219         DBG(" -> maple_init_IRQ\n");
 220
 221         /* XXX: Non standard, replace that with a proper openpic/mpic node
 222          * in the device-tree. Find the Open PIC if present */
 223         root = of_find_node_by_path("/");
 224         opprop = (unsigned int *) get_property(root,
 225                                 "platform-open-pic", NULL);
 226         if (opprop == 0)
 227                 panic("OpenPIC not found !\n");
 228
 229         n = prom_n_addr_cells(root);
 230         for (opic_addr = 0; n > 0; --n)
 231                 opic_addr = (opic_addr << 32) + *opprop++;
 232         of_node_put(root);
 233
 234         /* Obtain sense values from device-tree */
 235         prom_get_irq_senses(senses, 0, 128);
 236
 237         mpic = mpic_alloc(opic_addr,
 238                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 239                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 240                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 241         BUG_ON(mpic == NULL);
 242         mpic_init(mpic);
 243
 244         DBG(" <- maple_init_IRQ\n");
 245 }
 246
 247 static void __init maple_progress(char *s, unsigned short hex)
 248 {
 249         printk("*** %04x : %s\n", hex, s ? s : "");
 250 }
 251
 252
 253 /*
 254  * Called very early, MMU is off, device-tree isn't unflattened
 255  */
 256 static int __init maple_probe(void)
 257 {
 258         unsigned long root = of_get_flat_dt_root();
 259         if (!of_flat_dt_is_compatible(root, "Momentum,Maple"))
 260                 return 0;
 261         /*
 262          * On U3, the DART (iommu) must be allocated now since it
 263          * has an impact on htab_initialize (due to the large page it
 264          * occupies having to be broken up so the DART itself is not
 265          * part of the cacheable linar mapping
 266          */
 267         alloc_dart_table();
 268
 269         hpte_init_native();
 270
 271         return 1;
 272 }
 273
 274 define_machine(maple_md) {
 275         .name                   = "Maple",
 276         .probe                  = maple_probe,
 277         .setup_arch             = maple_setup_arch,
 278         .init_early             = maple_init_early,
 279         .init_IRQ               = maple_init_IRQ,
 280         .get_irq                = mpic_get_irq,
 281         .pcibios_fixup          = maple_pcibios_fixup,
 282         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 283         .restart                = maple_restart,
 284         .power_off              = maple_power_off,
 285         .halt                   = maple_halt,
 286         .get_boot_time          = maple_get_boot_time,
 287         .set_rtc_time           = maple_set_rtc_time,
 288         .get_rtc_time           = maple_get_rtc_time,
 289         .calibrate_decr         = generic_calibrate_decr,
 290         .progress               = maple_progress,
 291         .power_save             = power4_idle,
 292 #ifdef CONFIG_KEXEC
 293         .machine_kexec          = default_machine_kexec,
 294         .machine_kexec_prepare  = default_machine_kexec_prepare,
 295         .machine_crash_shutdown = default_machine_crash_shutdown,
 296 #endif
 297 };