SAFE public projects git trees. - safe/jmp/linux-2.6/blob - arch/powerpc/platforms/pasemi/setup.c

   1 /*
   2  * Copyright (C) 2006-2007 PA Semi, Inc
   3  *
   4  * Authors: Kip Walker, PA Semi
   5  *          Olof Johansson, PA Semi
   6  *
   7  * Maintained by: Olof Johansson <olof@lixom.net>
   8  *
   9  * Based on arch/powerpc/platforms/maple/setup.c
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  */
  24
  25 #include <linux/errno.h>
  26 #include <linux/kernel.h>
  27 #include <linux/delay.h>
  28 #include <linux/console.h>
  29 #include <linux/pci.h>
  30
  31 #include <asm/prom.h>
  32 #include <asm/system.h>
  33 #include <asm/iommu.h>
  34 #include <asm/machdep.h>
  35 #include <asm/mpic.h>
  36 #include <asm/smp.h>
  37 #include <asm/time.h>
  38 #include <asm/of_platform.h>
  39
  40 #include <pcmcia/ss.h>
  41 #include <pcmcia/cistpl.h>
  42 #include <pcmcia/ds.h>
  43
  44 #include "pasemi.h"
  45
  46 /* SDC reset register, must be pre-mapped at reset time */
  47 static void __iomem *reset_reg;
  48
  49 /* Various error status registers, must be pre-mapped at MCE time */
  50
  51 #define MAX_MCE_REGS    32
  52 struct mce_regs {
  53         char *name;
  54         void __iomem *addr;
  55 };
  56
  57 static struct mce_regs mce_regs[MAX_MCE_REGS];
  58 static int num_mce_regs;
  59
  60
  61 static void pas_restart(char *cmd)
  62 {
  63         printk("Restarting...\n");
  64         while (1)
  65                 out_le32(reset_reg, 0x6000000);
  66 }
  67
  68 #ifdef CONFIG_SMP
  69 static DEFINE_SPINLOCK(timebase_lock);
  70 static unsigned long timebase;
  71
  72 static void __devinit pas_give_timebase(void)
  73 {
  74         spin_lock(&timebase_lock);
  75         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
  76         isync();
  77         timebase = get_tb();
  78         spin_unlock(&timebase_lock);
  79
  80         while (timebase)
  81                 barrier();
  82         mtspr(SPRN_TBCTL, TBCTL_RESTART);
  83 }
  84
  85 static void __devinit pas_take_timebase(void)
  86 {
  87         while (!timebase)
  88                 smp_rmb();
  89
  90         spin_lock(&timebase_lock);
  91         set_tb(timebase >> 32, timebase & 0xffffffff);
  92         timebase = 0;
  93         spin_unlock(&timebase_lock);
  94 }
  95
  96 struct smp_ops_t pas_smp_ops = {
  97         .probe          = smp_mpic_probe,
  98         .message_pass   = smp_mpic_message_pass,
  99         .kick_cpu       = smp_generic_kick_cpu,
 100         .setup_cpu      = smp_mpic_setup_cpu,
 101         .give_timebase  = pas_give_timebase,
 102         .take_timebase  = pas_take_timebase,
 103 };
 104 #endif /* CONFIG_SMP */
 105
 106 void __init pas_setup_arch(void)
 107 {
 108 #ifdef CONFIG_SMP
 109         /* Setup SMP callback */
 110         smp_ops = &pas_smp_ops;
 111 #endif
 112         /* Lookup PCI hosts */
 113         pas_pci_init();
 114
 115 #ifdef CONFIG_DUMMY_CONSOLE
 116         conswitchp = &dummy_con;
 117 #endif
 118
 119         /* Remap SDC register for doing reset */
 120         /* XXXOJN This should maybe come out of the device tree */
 121         reset_reg = ioremap(0xfc101100, 4);
 122 }
 123
 124 static int __init pas_setup_mce_regs(void)
 125 {
 126         struct pci_dev *dev;
 127         int reg;
 128
 129         if (!machine_is(pasemi))
 130                 return -ENODEV;
 131
 132         /* Remap various SoC status registers for use by the MCE handler */
 133
 134         reg = 0;
 135
 136         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
 137         while (dev && reg < MAX_MCE_REGS) {
 138                 mce_regs[reg].name = kasprintf(GFP_KERNEL,
 139                                                 "mc%d_mcdebug_errsta", reg);
 140                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
 141                 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
 142                 reg++;
 143         }
 144
 145         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
 146         if (dev && reg+4 < MAX_MCE_REGS) {
 147                 mce_regs[reg].name = "iobdbg_IntStatus1";
 148                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
 149                 reg++;
 150                 mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
 151                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
 152                 reg++;
 153                 mce_regs[reg].name = "iobiom_IntStatus";
 154                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
 155                 reg++;
 156                 mce_regs[reg].name = "iobiom_IntDbgReg";
 157                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
 158                 reg++;
 159         }
 160
 161         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
 162         if (dev && reg+2 < MAX_MCE_REGS) {
 163                 mce_regs[reg].name = "l2csts_IntStatus";
 164                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
 165                 reg++;
 166                 mce_regs[reg].name = "l2csts_Cnt";
 167                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
 168                 reg++;
 169         }
 170
 171         num_mce_regs = reg;
 172
 173         return 0;
 174 }
 175 device_initcall(pas_setup_mce_regs);
 176
 177 static __init void pas_init_IRQ(void)
 178 {
 179         struct device_node *np;
 180         struct device_node *root, *mpic_node;
 181         unsigned long openpic_addr;
 182         const unsigned int *opprop;
 183         int naddr, opplen;
 184         struct mpic *mpic;
 185
 186         mpic_node = NULL;
 187
 188         for_each_node_by_type(np, "interrupt-controller")
 189                 if (of_device_is_compatible(np, "open-pic")) {
 190                         mpic_node = np;
 191                         break;
 192                 }
 193         if (!mpic_node)
 194                 for_each_node_by_type(np, "open-pic") {
 195                         mpic_node = np;
 196                         break;
 197                 }
 198         if (!mpic_node) {
 199                 printk(KERN_ERR
 200                         "Failed to locate the MPIC interrupt controller\n");
 201                 return;
 202         }
 203
 204         /* Find address list in /platform-open-pic */
 205         root = of_find_node_by_path("/");
 206         naddr = of_n_addr_cells(root);
 207         opprop = of_get_property(root, "platform-open-pic", &opplen);
 208         if (!opprop) {
 209                 printk(KERN_ERR "No platform-open-pic property.\n");
 210                 of_node_put(root);
 211                 return;
 212         }
 213         openpic_addr = of_read_number(opprop, naddr);
 214         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 215
 216         mpic = mpic_alloc(mpic_node, openpic_addr,
 217                           MPIC_PRIMARY|MPIC_LARGE_VECTORS|MPIC_WANTS_RESET,
 218                           0, 0, " PAS-OPIC  ");
 219         BUG_ON(!mpic);
 220
 221         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 222         mpic_init(mpic);
 223         of_node_put(mpic_node);
 224         of_node_put(root);
 225 }
 226
 227 static void __init pas_progress(char *s, unsigned short hex)
 228 {
 229         printk("[%04x] : %s\n", hex, s ? s : "");
 230 }
 231
 232
 233 static int pas_machine_check_handler(struct pt_regs *regs)
 234 {
 235         int cpu = smp_processor_id();
 236         unsigned long srr0, srr1, dsisr;
 237         int dump_slb = 0;
 238         int i;
 239
 240         srr0 = regs->nip;
 241         srr1 = regs->msr;
 242         dsisr = mfspr(SPRN_DSISR);
 243         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 244         printk(KERN_ERR "SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 245         printk(KERN_ERR "DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
 246         printk(KERN_ERR "BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
 247                 mfspr(SPRN_PA6T_MER));
 248         printk(KERN_ERR "IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
 249                 mfspr(SPRN_PA6T_DER));
 250         printk(KERN_ERR "Cause:\n");
 251
 252         if (srr1 & 0x200000)
 253                 printk(KERN_ERR "Signalled by SDC\n");
 254
 255         if (srr1 & 0x100000) {
 256                 printk(KERN_ERR "Load/Store detected error:\n");
 257                 if (dsisr & 0x8000)
 258                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 259                 if (dsisr & 0x4000)
 260                         printk(KERN_ERR "LSU snoop response error\n");
 261                 if (dsisr & 0x2000) {
 262                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 263                         dump_slb = 1;
 264                 }
 265                 if (dsisr & 0x1000)
 266                         printk(KERN_ERR "Recoverable Duptags\n");
 267                 if (dsisr & 0x800)
 268                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 269                 if (dsisr & 0x400)
 270                         printk(KERN_ERR "TLB parity error count overflow\n");
 271         }
 272
 273         if (srr1 & 0x80000)
 274                 printk(KERN_ERR "Bus Error\n");
 275
 276         if (srr1 & 0x40000) {
 277                 printk(KERN_ERR "I-side SLB multiple hit\n");
 278                 dump_slb = 1;
 279         }
 280
 281         if (srr1 & 0x20000)
 282                 printk(KERN_ERR "I-cache parity error hit\n");
 283
 284         if (num_mce_regs == 0)
 285                 printk(KERN_ERR "No MCE registers mapped yet, can't dump\n");
 286         else
 287                 printk(KERN_ERR "SoC debug registers:\n");
 288
 289         for (i = 0; i < num_mce_regs; i++)
 290                 printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name,
 291                         in_le32(mce_regs[i].addr));
 292
 293         if (dump_slb) {
 294                 unsigned long e, v;
 295                 int i;
 296
 297                 printk(KERN_ERR "slb contents:\n");
 298                 for (i = 0; i < SLB_NUM_ENTRIES; i++) {
 299                         asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
 300                         asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
 301                         printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v);
 302                 }
 303         }
 304
 305
 306         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 307         return !!(srr1 & 0x2);
 308 }
 309
 310 static void __init pas_init_early(void)
 311 {
 312         iommu_init_early_pasemi();
 313 }
 314
 315 #ifdef CONFIG_PCMCIA
 316 static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
 317                          void *data)
 318 {
 319         struct device *dev = data;
 320         struct device *parent;
 321         struct pcmcia_device *pdev = to_pcmcia_dev(dev);
 322
 323         /* We are only intereted in device addition */
 324         if (action != BUS_NOTIFY_ADD_DEVICE)
 325                 return 0;
 326
 327         parent = pdev->socket->dev.parent;
 328
 329         /* We know electra_cf devices will always have of_node set, since
 330          * electra_cf is an of_platform driver.
 331          */
 332         if (!parent->archdata.of_node)
 333                 return 0;
 334
 335         if (!of_device_is_compatible(parent->archdata.of_node, "electra-cf"))
 336                 return 0;
 337
 338         /* We use the direct ops for localbus */
 339         dev->archdata.dma_ops = &dma_direct_ops;
 340
 341         return 0;
 342 }
 343
 344 static struct notifier_block pcmcia_notifier = {
 345         .notifier_call = pcmcia_notify,
 346 };
 347
 348 static inline void pasemi_pcmcia_init(void)
 349 {
 350         extern struct bus_type pcmcia_bus_type;
 351
 352         bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
 353 }
 354
 355 #else
 356
 357 static inline void pasemi_pcmcia_init(void)
 358 {
 359 }
 360
 361 #endif
 362
 363
 364 static struct of_device_id pasemi_bus_ids[] = {
 365         { .type = "localbus", },
 366         { .type = "sdc", },
 367         {},
 368 };
 369
 370 static int __init pasemi_publish_devices(void)
 371 {
 372         if (!machine_is(pasemi))
 373                 return 0;
 374
 375         pasemi_pcmcia_init();
 376
 377         /* Publish OF platform devices for SDC and other non-PCI devices */
 378         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
 379
 380         return 0;
 381 }
 382 device_initcall(pasemi_publish_devices);
 383
 384
 385 /*
 386  * Called very early, MMU is off, device-tree isn't unflattened
 387  */
 388 static int __init pas_probe(void)
 389 {
 390         unsigned long root = of_get_flat_dt_root();
 391
 392         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 393                 return 0;
 394
 395         hpte_init_native();
 396
 397         alloc_iobmap_l2();
 398
 399         return 1;
 400 }
 401
 402 define_machine(pasemi) {
 403         .name                   = "PA Semi PA6T-1682M",
 404         .probe                  = pas_probe,
 405         .setup_arch             = pas_setup_arch,
 406         .init_early             = pas_init_early,
 407         .init_IRQ               = pas_init_IRQ,
 408         .get_irq                = mpic_get_irq,
 409         .restart                = pas_restart,
 410         .get_boot_time          = pas_get_boot_time,
 411         .calibrate_decr         = generic_calibrate_decr,
 412         .progress               = pas_progress,
 413         .machine_check_exception = pas_machine_check_handler,
 414 };