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