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/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 extern void generic_find_legacy_serial_ports(u64 *physport,
  74                 unsigned int *default_speed);
  75
  76 static void maple_restart(char *cmd)
  77 {
  78         unsigned int maple_nvram_base;
  79         unsigned int maple_nvram_offset;
  80         unsigned int maple_nvram_command;
  81         struct device_node *rtcs;
  82
  83         /* find NVRAM device */
  84         rtcs = find_compatible_devices("nvram", "AMD8111");
  85         if (rtcs && rtcs->addrs) {
  86                 maple_nvram_base = rtcs->addrs[0].address;
  87         } else {
  88                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
  89                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  90                 return;
  91         }
  92
  93         /* find service processor device */
  94         rtcs = find_devices("service-processor");
  95         if (!rtcs) {
  96                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
  97                 printk(KERN_EMERG "Maple: Manual Restart Required\n");
  98                 return;
  99         }
 100         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 101                         "restart-addr", NULL);
 102         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 103                         "restart-value", NULL);
 104
 105         /* send command */
 106         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 107         for (;;) ;
 108 }
 109
 110 static void maple_power_off(void)
 111 {
 112         unsigned int maple_nvram_base;
 113         unsigned int maple_nvram_offset;
 114         unsigned int maple_nvram_command;
 115         struct device_node *rtcs;
 116
 117         /* find NVRAM device */
 118         rtcs = find_compatible_devices("nvram", "AMD8111");
 119         if (rtcs && rtcs->addrs) {
 120                 maple_nvram_base = rtcs->addrs[0].address;
 121         } else {
 122                 printk(KERN_EMERG "Maple: Unable to find NVRAM\n");
 123                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 124                 return;
 125         }
 126
 127         /* find service processor device */
 128         rtcs = find_devices("service-processor");
 129         if (!rtcs) {
 130                 printk(KERN_EMERG "Maple: Unable to find Service Processor\n");
 131                 printk(KERN_EMERG "Maple: Manual Power-Down Required\n");
 132                 return;
 133         }
 134         maple_nvram_offset = *(unsigned int*) get_property(rtcs,
 135                         "power-off-addr", NULL);
 136         maple_nvram_command = *(unsigned int*) get_property(rtcs,
 137                         "power-off-value", NULL);
 138
 139         /* send command */
 140         outb_p(maple_nvram_command, maple_nvram_base + maple_nvram_offset);
 141         for (;;) ;
 142 }
 143
 144 static void maple_halt(void)
 145 {
 146         maple_power_off();
 147 }
 148
 149 #ifdef CONFIG_SMP
 150 struct smp_ops_t maple_smp_ops = {
 151         .probe          = smp_mpic_probe,
 152         .message_pass   = smp_mpic_message_pass,
 153         .kick_cpu       = smp_generic_kick_cpu,
 154         .setup_cpu      = smp_mpic_setup_cpu,
 155         .give_timebase  = smp_generic_give_timebase,
 156         .take_timebase  = smp_generic_take_timebase,
 157 };
 158 #endif /* CONFIG_SMP */
 159
 160 void __init maple_setup_arch(void)
 161 {
 162         /* init to some ~sane value until calibrate_delay() runs */
 163         loops_per_jiffy = 50000000;
 164
 165         /* Setup SMP callback */
 166 #ifdef CONFIG_SMP
 167         smp_ops = &maple_smp_ops;
 168 #endif
 169         /* Lookup PCI hosts */
 170         maple_pci_init();
 171
 172 #ifdef CONFIG_DUMMY_CONSOLE
 173         conswitchp = &dummy_con;
 174 #endif
 175
 176         printk(KERN_INFO "Using native/NAP idle loop\n");
 177 }
 178
 179 /*
 180  * Early initialization.
 181  */
 182 static void __init maple_init_early(void)
 183 {
 184         unsigned int default_speed;
 185         u64 physport;
 186
 187         DBG(" -> maple_init_early\n");
 188
 189         /* Initialize hash table, from now on, we can take hash faults
 190          * and call ioremap
 191          */
 192         hpte_init_native();
 193
 194         /* Find the serial port */
 195         generic_find_legacy_serial_ports(&physport, &default_speed);
 196
 197         DBG("phys port addr: %lx\n", (long)physport);
 198
 199         if (physport) {
 200                 void *comport;
 201                 /* Map the uart for udbg. */
 202                 comport = (void *)ioremap(physport, 16);
 203                 udbg_init_uart(comport, default_speed);
 204
 205                 DBG("Hello World !\n");
 206         }
 207
 208         /* Setup interrupt mapping options */
 209         ppc64_interrupt_controller = IC_OPEN_PIC;
 210
 211         iommu_init_early_u3();
 212
 213         DBG(" <- maple_init_early\n");
 214 }
 215
 216
 217 static __init void maple_init_IRQ(void)
 218 {
 219         struct device_node *root;
 220         unsigned int *opprop;
 221         unsigned long opic_addr;
 222         struct mpic *mpic;
 223         unsigned char senses[128];
 224         int n;
 225
 226         DBG(" -> maple_init_IRQ\n");
 227
 228         /* XXX: Non standard, replace that with a proper openpic/mpic node
 229          * in the device-tree. Find the Open PIC if present */
 230         root = of_find_node_by_path("/");
 231         opprop = (unsigned int *) get_property(root,
 232                                 "platform-open-pic", NULL);
 233         if (opprop == 0)
 234                 panic("OpenPIC not found !\n");
 235
 236         n = prom_n_addr_cells(root);
 237         for (opic_addr = 0; n > 0; --n)
 238                 opic_addr = (opic_addr << 32) + *opprop++;
 239         of_node_put(root);
 240
 241         /* Obtain sense values from device-tree */
 242         prom_get_irq_senses(senses, 0, 128);
 243
 244         mpic = mpic_alloc(opic_addr,
 245                           MPIC_PRIMARY | MPIC_BIG_ENDIAN |
 246                           MPIC_BROKEN_U3 | MPIC_WANTS_RESET,
 247                           0, 0, 128, 128, senses, 128, "U3-MPIC");
 248         BUG_ON(mpic == NULL);
 249         mpic_init(mpic);
 250
 251         DBG(" <- maple_init_IRQ\n");
 252 }
 253
 254 static void __init maple_progress(char *s, unsigned short hex)
 255 {
 256         printk("*** %04x : %s\n", hex, s ? s : "");
 257 }
 258
 259
 260 /*
 261  * Called very early, MMU is off, device-tree isn't unflattened
 262  */
 263 static int __init maple_probe(int platform)
 264 {
 265         if (platform != PLATFORM_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_u3_dart_table();
 274
 275         return 1;
 276 }
 277
 278 struct machdep_calls __initdata maple_md = {
 279         .probe                  = maple_probe,
 280         .setup_arch             = maple_setup_arch,
 281         .init_early             = maple_init_early,
 282         .init_IRQ               = maple_init_IRQ,
 283         .get_irq                = mpic_get_irq,
 284         .pcibios_fixup          = maple_pcibios_fixup,
 285         .pci_get_legacy_ide_irq = maple_pci_get_legacy_ide_irq,
 286         .restart                = maple_restart,
 287         .power_off              = maple_power_off,
 288         .halt                   = maple_halt,
 289         .get_boot_time          = maple_get_boot_time,
 290         .set_rtc_time           = maple_set_rtc_time,
 291         .get_rtc_time           = maple_get_rtc_time,
 292         .calibrate_decr         = generic_calibrate_decr,
 293         .progress               = maple_progress,
 294         .idle_loop              = native_idle,
 295 };