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