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 extern void generic_find_legacy_serial_ports(u64 *physport,
  75                 unsigned int *default_speed);
  76
  77 static void maple_restart(char *cmd)
  78 {
  79         unsigned int maple_nvram_base;
  80         unsigned int maple_nvram_offset;
  81         unsigned int maple_nvram_command;
  82         struct device_node *rtcs;
  83
  84         /* find NVRAM device */
  85         rtcs = find_compatible_devices("nvram", "AMD8111");
  86         if (rtcs && rtcs->addrs) {
  87                 maple_nvram_base = rtcs->addrs[0].address;
  88         } else {
  89                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  90                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  91                 return;
  92         }
  93
  94         /* find service processor device */
  95         rtcs = find_devices("service-processor");
  96         if (!rtcs) {
  97                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
  98                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  99                 return;
 100         }
 101         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 102                         "restart-addr", NULL);
 103         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 104                         "restart-value", NULL);
 105
 106         /* send command */
 107         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 108         for (;;) ;
 109 }
 110
 111 static void maple_power_off(void)
 112 {
 113         unsigned int maple_nvram_base;
 114         unsigned int maple_nvram_offset;
 115         unsigned int maple_nvram_command;
 116         struct device_node *rtcs;
 117
 118         /* find NVRAM device */
 119         rtcs = find_compatible_devices("nvram", "AMD8111");
 120         if (rtcs && rtcs->addrs) {
 121                 maple_nvram_base = rtcs->addrs[0].address;
 122         } else {
 123                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 124                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 125                 return;
 126         }
 127
 128         /* find service processor device */
 129         rtcs = find_devices("service-processor");
 130         if (!rtcs) {
 131                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 132                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 133                 return;
 134         }
 135         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 136                         "power-off-addr", NULL);
 137         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 138                         "power-off-value", NULL);
 139
 140         /* send command */
 141         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 142         for (;;) ;
 143 }
 144
 145 static void maple_halt(void)
 146 {
 147         maple_power_off();
 148 }
 149
 150 #ifdef CONFIG_SMP
 151 struct smp_ops_t maple_smp_ops = {
 152         .probe          = smp_mpic_probe,
 153         .message_pass   = smp_mpic_message_pass,
 154         .kick_cpu       = smp_generic_kick_cpu,
 155         .setup_cpu      = smp_mpic_setup_cpu,
 156         .give_timebase  = smp_generic_give_timebase,
 157         .take_timebase  = smp_generic_take_timebase,
 158 };
 159 #endif /* CONFIG_SMP */
 160
 161 void __init maple_setup_arch(void)
 162 {
 163         /* init to some ~sane value until calibrate_delay() runs */
 164         loops_per_jiffy = 50000000;
 165
 166         /* Setup SMP callback */
 167 #ifdef CONFIG_SMP
 168         smp_ops = &maple_smp_ops;
 169 #endif
 170         /* Lookup PCI hosts */
 171         maple_pci_init();
 172
 173 #ifdef CONFIG_DUMMY_CONSOLE
 174         conswitchp = &dummy_con;
 175 #endif
 176
 177         printk(KERN_INFO "Using native/NAP idle loop\n");
 178 }
 179
 180 /*
 181  * Early initialization.
 182  */
 183 static void __init maple_init_early(void)
 184 {
 185         unsigned int default_speed;
 186         u64 physport;
 187
 188         DBG(" -> maple_init_early\n");
 189
 190         /* Initialize hash table, from now on, we can take hash faults
 191          * and call ioremap
 192          */
 193         hpte_init_native();
 194
 195         /* Setup interrupt mapping options */
 196         ppc64_interrupt_controller = IC_OPEN_PIC;
 197
 198         iommu_init_early_dart();
 199
 200         DBG(" <- maple_init_early\n");
 201 }
 202
 203
 204 static __init void maple_init_IRQ(void)
 205 {
 206         struct device_node *root;
 207         unsigned int *opprop;
 208         unsigned long opic_addr;
 209         struct mpic *mpic;
 210         unsigned char senses[128];
 211         int n;
 212
 213         DBG(" -> maple_init_IRQ\n");
 214
 215         /* XXX: Non standard, replace that with a proper openpic/mpic node
 216          * in the device-tree. Find the Open PIC if present */
 217         root = of_find_node_by_path("/");
 218         opprop = (unsigned int *) get_property(root,
 219                                 "platform-open-pic", NULL);
 220         if (opprop == 0)
 221                 panic("OpenPIC not found !\n");
 222
 223         n = prom_n_addr_cells(root);
 224         for (opic_addr = 0; n > 0; --n)
 225                 opic_addr = (opic_addr << 32) + *opprop++;
 226         of_node_put(root);
 227
 228         /* Obtain sense values from device-tree */
 229         prom_get_irq_senses(senses, 0, 128);
 230
 231         mpic = mpic_alloc(opic_addr,
 232                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 233                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 234                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 235         BUG_ON(mpic == NULL);
 236         mpic_init(mpic);
 237
 238         DBG(" <- maple_init_IRQ\n");
 239 }
 240
 241 static void __init maple_progress(char *s, unsigned short hex)
 242 {
 243         printk("*** %04x : %s\n", hex, s ? s : "");
 244 }
 245
 246
 247 /*
 248  * Called very early, MMU is off, device-tree isn't unflattened
 249  */
 250 static int __init maple_probe(int platform)
 251 {
 252         if (platform != PLATFORM_MAPLE)
 253                 return 0;
 254         /*
 255          * On U3, the DART (iommu) must be allocated now since it
 256          * has an impact on htab_initialize (due to the large page it
 257          * occupies having to be broken up so the DART itself is not
 258          * part of the cacheable linar mapping
 259          */
 260         alloc_dart_table();
 261
 262         return 1;
 263 }
 264
 265 struct machdep_calls __initdata maple_md = {
 266         .probe                  = maple_probe,
 267         .setup_arch             = maple_setup_arch,
 268         .init_early             = maple_init_early,
 269         .init_IRQ               = maple_init_IRQ,
 270         .get_irq                = mpic_get_irq,
 271         .pcibios_fixup          = maple_pcibios_fixup,
 272         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 273         .restart                = maple_restart,
 274         .power_off              = maple_power_off,
 275         .halt                   = maple_halt,
 276         .get_boot_time          = maple_get_boot_time,
 277         .set_rtc_time           = maple_set_rtc_time,
 278         .get_rtc_time           = maple_get_rtc_time,
 279         .calibrate_decr         = generic_calibrate_decr,
 280         .progress               = maple_progress,
 281         .idle_loop              = native_idle,
 282 #ifdef CONFIG_KEXEC
 283         .machine_kexec          = default_machine_kexec,
 284         .machine_kexec_prepare  = default_machine_kexec_prepare,
 285         .machine_crash_shutdown = default_machine_crash_shutdown,
 286 #endif
 287 };