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 #include <linux/of_platform.h>
  31 #include <linux/gfp.h>
  32
  33 #include <asm/prom.h>
  34 #include <asm/system.h>
  35 #include <asm/iommu.h>
  36 #include <asm/machdep.h>
  37 #include <asm/mpic.h>
  38 #include <asm/smp.h>
  39 #include <asm/time.h>
  40 #include <asm/mmu.h>
  41
  42 #include <pcmcia/ss.h>
  43 #include <pcmcia/cistpl.h>
  44 #include <pcmcia/ds.h>
  45
  46 #include "pasemi.h"
  47
  48 /* SDC reset register, must be pre-mapped at reset time */
  49 static void __iomem *reset_reg;
  50
  51 /* Various error status registers, must be pre-mapped at MCE time */
  52
  53 #define MAX_MCE_REGS    32
  54 struct mce_regs {
  55         char *name;
  56         void __iomem *addr;
  57 };
  58
  59 static struct mce_regs mce_regs[MAX_MCE_REGS];
  60 static int num_mce_regs;
  61 static int nmi_virq = NO_IRQ;
  62
  63
  64 static void pas_restart(char *cmd)
  65 {
  66         /* Need to put others cpu in hold loop so they're not sleeping */
  67         smp_send_stop();
  68         udelay(10000);
  69         printk("Restarting...\n");
  70         while (1)
  71                 out_le32(reset_reg, 0x6000000);
  72 }
  73
  74 #ifdef CONFIG_SMP
  75 static arch_spinlock_t timebase_lock;
  76 static unsigned long timebase;
  77
  78 static void __devinit pas_give_timebase(void)
  79 {
  80         unsigned long flags;
  81
  82         local_irq_save(flags);
  83         hard_irq_disable();
  84         arch_spin_lock(&timebase_lock);
  85         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
  86         isync();
  87         timebase = get_tb();
  88         arch_spin_unlock(&timebase_lock);
  89
  90         while (timebase)
  91                 barrier();
  92         mtspr(SPRN_TBCTL, TBCTL_RESTART);
  93         local_irq_restore(flags);
  94 }
  95
  96 static void __devinit pas_take_timebase(void)
  97 {
  98         while (!timebase)
  99                 smp_rmb();
 100
 101         arch_spin_lock(&timebase_lock);
 102         set_tb(timebase >> 32, timebase & 0xffffffff);
 103         timebase = 0;
 104         arch_spin_unlock(&timebase_lock);
 105 }
 106
 107 struct smp_ops_t pas_smp_ops = {
 108         .probe          = smp_mpic_probe,
 109         .message_pass   = smp_mpic_message_pass,
 110         .kick_cpu       = smp_generic_kick_cpu,
 111         .setup_cpu      = smp_mpic_setup_cpu,
 112         .give_timebase  = pas_give_timebase,
 113         .take_timebase  = pas_take_timebase,
 114 };
 115 #endif /* CONFIG_SMP */
 116
 117 void __init pas_setup_arch(void)
 118 {
 119 #ifdef CONFIG_SMP
 120         /* Setup SMP callback */
 121         smp_ops = &pas_smp_ops;
 122 #endif
 123         /* Lookup PCI hosts */
 124         pas_pci_init();
 125
 126 #ifdef CONFIG_DUMMY_CONSOLE
 127         conswitchp = &dummy_con;
 128 #endif
 129
 130         /* Remap SDC register for doing reset */
 131         /* XXXOJN This should maybe come out of the device tree */
 132         reset_reg = ioremap(0xfc101100, 4);
 133 }
 134
 135 static int __init pas_setup_mce_regs(void)
 136 {
 137         struct pci_dev *dev;
 138         int reg;
 139
 140         /* Remap various SoC status registers for use by the MCE handler */
 141
 142         reg = 0;
 143
 144         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
 145         while (dev && reg < MAX_MCE_REGS) {
 146                 mce_regs[reg].name = kasprintf(GFP_KERNEL,
 147                                                 "mc%d_mcdebug_errsta", reg);
 148                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
 149                 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
 150                 reg++;
 151         }
 152
 153         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
 154         if (dev && reg+4 < MAX_MCE_REGS) {
 155                 mce_regs[reg].name = "iobdbg_IntStatus1";
 156                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
 157                 reg++;
 158                 mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
 159                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
 160                 reg++;
 161                 mce_regs[reg].name = "iobiom_IntStatus";
 162                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
 163                 reg++;
 164                 mce_regs[reg].name = "iobiom_IntDbgReg";
 165                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
 166                 reg++;
 167         }
 168
 169         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
 170         if (dev && reg+2 < MAX_MCE_REGS) {
 171                 mce_regs[reg].name = "l2csts_IntStatus";
 172                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
 173                 reg++;
 174                 mce_regs[reg].name = "l2csts_Cnt";
 175                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
 176                 reg++;
 177         }
 178
 179         num_mce_regs = reg;
 180
 181         return 0;
 182 }
 183 machine_device_initcall(pasemi, pas_setup_mce_regs);
 184
 185 static __init void pas_init_IRQ(void)
 186 {
 187         struct device_node *np;
 188         struct device_node *root, *mpic_node;
 189         unsigned long openpic_addr;
 190         const unsigned int *opprop;
 191         int naddr, opplen;
 192         int mpic_flags;
 193         const unsigned int *nmiprop;
 194         struct mpic *mpic;
 195
 196         mpic_node = NULL;
 197
 198         for_each_node_by_type(np, "interrupt-controller")
 199                 if (of_device_is_compatible(np, "open-pic")) {
 200                         mpic_node = np;
 201                         break;
 202                 }
 203         if (!mpic_node)
 204                 for_each_node_by_type(np, "open-pic") {
 205                         mpic_node = np;
 206                         break;
 207                 }
 208         if (!mpic_node) {
 209                 printk(KERN_ERR
 210                         "Failed to locate the MPIC interrupt controller\n");
 211                 return;
 212         }
 213
 214         /* Find address list in /platform-open-pic */
 215         root = of_find_node_by_path("/");
 216         naddr = of_n_addr_cells(root);
 217         opprop = of_get_property(root, "platform-open-pic", &opplen);
 218         if (!opprop) {
 219                 printk(KERN_ERR "No platform-open-pic property.\n");
 220                 of_node_put(root);
 221                 return;
 222         }
 223         openpic_addr = of_read_number(opprop, naddr);
 224         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 225
 226         mpic_flags = MPIC_PRIMARY | MPIC_LARGE_VECTORS | MPIC_NO_BIAS;
 227
 228         nmiprop = of_get_property(mpic_node, "nmi-source", NULL);
 229         if (nmiprop)
 230                 mpic_flags |= MPIC_ENABLE_MCK;
 231
 232         mpic = mpic_alloc(mpic_node, openpic_addr,
 233                           mpic_flags, 0, 0, "PASEMI-OPIC");
 234         BUG_ON(!mpic);
 235
 236         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 237         mpic_init(mpic);
 238         /* The NMI/MCK source needs to be prio 15 */
 239         if (nmiprop) {
 240                 nmi_virq = irq_create_mapping(NULL, *nmiprop);
 241                 mpic_irq_set_priority(nmi_virq, 15);
 242                 set_irq_type(nmi_virq, IRQ_TYPE_EDGE_RISING);
 243                 mpic_unmask_irq(nmi_virq);
 244         }
 245
 246         of_node_put(mpic_node);
 247         of_node_put(root);
 248 }
 249
 250 static void __init pas_progress(char *s, unsigned short hex)
 251 {
 252         printk("[%04x] : %s\n", hex, s ? s : "");
 253 }
 254
 255
 256 static int pas_machine_check_handler(struct pt_regs *regs)
 257 {
 258         int cpu = smp_processor_id();
 259         unsigned long srr0, srr1, dsisr;
 260         int dump_slb = 0;
 261         int i;
 262
 263         srr0 = regs->nip;
 264         srr1 = regs->msr;
 265
 266         if (nmi_virq != NO_IRQ && mpic_get_mcirq() == nmi_virq) {
 267                 printk(KERN_ERR "NMI delivered\n");
 268                 debugger(regs);
 269                 mpic_end_irq(nmi_virq);
 270                 goto out;
 271         }
 272
 273         dsisr = mfspr(SPRN_DSISR);
 274         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 275         printk(KERN_ERR "SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 276         printk(KERN_ERR "DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
 277         printk(KERN_ERR "BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
 278                 mfspr(SPRN_PA6T_MER));
 279         printk(KERN_ERR "IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
 280                 mfspr(SPRN_PA6T_DER));
 281         printk(KERN_ERR "Cause:\n");
 282
 283         if (srr1 & 0x200000)
 284                 printk(KERN_ERR "Signalled by SDC\n");
 285
 286         if (srr1 & 0x100000) {
 287                 printk(KERN_ERR "Load/Store detected error:\n");
 288                 if (dsisr & 0x8000)
 289                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 290                 if (dsisr & 0x4000)
 291                         printk(KERN_ERR "LSU snoop response error\n");
 292                 if (dsisr & 0x2000) {
 293                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 294                         dump_slb = 1;
 295                 }
 296                 if (dsisr & 0x1000)
 297                         printk(KERN_ERR "Recoverable Duptags\n");
 298                 if (dsisr & 0x800)
 299                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 300                 if (dsisr & 0x400)
 301                         printk(KERN_ERR "TLB parity error count overflow\n");
 302         }
 303
 304         if (srr1 & 0x80000)
 305                 printk(KERN_ERR "Bus Error\n");
 306
 307         if (srr1 & 0x40000) {
 308                 printk(KERN_ERR "I-side SLB multiple hit\n");
 309                 dump_slb = 1;
 310         }
 311
 312         if (srr1 & 0x20000)
 313                 printk(KERN_ERR "I-cache parity error hit\n");
 314
 315         if (num_mce_regs == 0)
 316                 printk(KERN_ERR "No MCE registers mapped yet, can't dump\n");
 317         else
 318                 printk(KERN_ERR "SoC debug registers:\n");
 319
 320         for (i = 0; i < num_mce_regs; i++)
 321                 printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name,
 322                         in_le32(mce_regs[i].addr));
 323
 324         if (dump_slb) {
 325                 unsigned long e, v;
 326                 int i;
 327
 328                 printk(KERN_ERR "slb contents:\n");
 329                 for (i = 0; i < mmu_slb_size; i++) {
 330                         asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
 331                         asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
 332                         printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v);
 333                 }
 334         }
 335
 336 out:
 337         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 338         return !!(srr1 & 0x2);
 339 }
 340
 341 static void __init pas_init_early(void)
 342 {
 343         iommu_init_early_pasemi();
 344 }
 345
 346 #ifdef CONFIG_PCMCIA
 347 static int pcmcia_notify(struct notifier_block *nb, unsigned long action,
 348                          void *data)
 349 {
 350         struct device *dev = data;
 351         struct device *parent;
 352         struct pcmcia_device *pdev = to_pcmcia_dev(dev);
 353
 354         /* We are only intereted in device addition */
 355         if (action != BUS_NOTIFY_ADD_DEVICE)
 356                 return 0;
 357
 358         parent = pdev->socket->dev.parent;
 359
 360         /* We know electra_cf devices will always have of_node set, since
 361          * electra_cf is an of_platform driver.
 362          */
 363         if (!parent->archdata.of_node)
 364                 return 0;
 365
 366         if (!of_device_is_compatible(parent->archdata.of_node, "electra-cf"))
 367                 return 0;
 368
 369         /* We use the direct ops for localbus */
 370         dev->archdata.dma_ops = &dma_direct_ops;
 371
 372         return 0;
 373 }
 374
 375 static struct notifier_block pcmcia_notifier = {
 376         .notifier_call = pcmcia_notify,
 377 };
 378
 379 static inline void pasemi_pcmcia_init(void)
 380 {
 381         extern struct bus_type pcmcia_bus_type;
 382
 383         bus_register_notifier(&pcmcia_bus_type, &pcmcia_notifier);
 384 }
 385
 386 #else
 387
 388 static inline void pasemi_pcmcia_init(void)
 389 {
 390 }
 391
 392 #endif
 393
 394
 395 static struct of_device_id pasemi_bus_ids[] = {
 396         /* Unfortunately needed for legacy firmwares */
 397         { .type = "localbus", },
 398         { .type = "sdc", },
 399         /* These are the proper entries, which newer firmware uses */
 400         { .compatible = "pasemi,localbus", },
 401         { .compatible = "pasemi,sdc", },
 402         {},
 403 };
 404
 405 static int __init pasemi_publish_devices(void)
 406 {
 407         pasemi_pcmcia_init();
 408
 409         /* Publish OF platform devices for SDC and other non-PCI devices */
 410         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
 411
 412         return 0;
 413 }
 414 machine_device_initcall(pasemi, pasemi_publish_devices);
 415
 416
 417 /*
 418  * Called very early, MMU is off, device-tree isn't unflattened
 419  */
 420 static int __init pas_probe(void)
 421 {
 422         unsigned long root = of_get_flat_dt_root();
 423
 424         if (!of_flat_dt_is_compatible(root, "PA6T-1682M") &&
 425             !of_flat_dt_is_compatible(root, "pasemi,pwrficient"))
 426                 return 0;
 427
 428         hpte_init_native();
 429
 430         alloc_iobmap_l2();
 431
 432         return 1;
 433 }
 434
 435 define_machine(pasemi) {
 436         .name                   = "PA Semi PWRficient",
 437         .probe                  = pas_probe,
 438         .setup_arch             = pas_setup_arch,
 439         .init_early             = pas_init_early,
 440         .init_IRQ               = pas_init_IRQ,
 441         .get_irq                = mpic_get_irq,
 442         .restart                = pas_restart,
 443         .get_boot_time          = pas_get_boot_time,
 444         .calibrate_decr         = generic_calibrate_decr,
 445         .progress               = pas_progress,
 446         .machine_check_exception = pas_machine_check_handler,
 447 };