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 "pasemi.h"
  41
  42 /* SDC reset register, must be pre-mapped at reset time */
  43 static void __iomem *reset_reg;
  44
  45 /* Various error status registers, must be pre-mapped at MCE time */
  46
  47 #define MAX_MCE_REGS    32
  48 struct mce_regs {
  49         char *name;
  50         void __iomem *addr;
  51 };
  52
  53 static struct mce_regs mce_regs[MAX_MCE_REGS];
  54 static int num_mce_regs;
  55
  56
  57 static void pas_restart(char *cmd)
  58 {
  59         printk("Restarting...\n");
  60         while (1)
  61                 out_le32(reset_reg, 0x6000000);
  62 }
  63
  64 #ifdef CONFIG_SMP
  65 static DEFINE_SPINLOCK(timebase_lock);
  66 static unsigned long timebase;
  67
  68 static void __devinit pas_give_timebase(void)
  69 {
  70         spin_lock(&timebase_lock);
  71         mtspr(SPRN_TBCTL, TBCTL_FREEZE);
  72         isync();
  73         timebase = get_tb();
  74         spin_unlock(&timebase_lock);
  75
  76         while (timebase)
  77                 barrier();
  78         mtspr(SPRN_TBCTL, TBCTL_RESTART);
  79 }
  80
  81 static void __devinit pas_take_timebase(void)
  82 {
  83         while (!timebase)
  84                 smp_rmb();
  85
  86         spin_lock(&timebase_lock);
  87         set_tb(timebase >> 32, timebase & 0xffffffff);
  88         timebase = 0;
  89         spin_unlock(&timebase_lock);
  90 }
  91
  92 struct smp_ops_t pas_smp_ops = {
  93         .probe          = smp_mpic_probe,
  94         .message_pass   = smp_mpic_message_pass,
  95         .kick_cpu       = smp_generic_kick_cpu,
  96         .setup_cpu      = smp_mpic_setup_cpu,
  97         .give_timebase  = pas_give_timebase,
  98         .take_timebase  = pas_take_timebase,
  99 };
 100 #endif /* CONFIG_SMP */
 101
 102 void __init pas_setup_arch(void)
 103 {
 104 #ifdef CONFIG_SMP
 105         /* Setup SMP callback */
 106         smp_ops = &pas_smp_ops;
 107 #endif
 108         /* Lookup PCI hosts */
 109         pas_pci_init();
 110
 111 #ifdef CONFIG_DUMMY_CONSOLE
 112         conswitchp = &dummy_con;
 113 #endif
 114
 115         /* Remap SDC register for doing reset */
 116         /* XXXOJN This should maybe come out of the device tree */
 117         reset_reg = ioremap(0xfc101100, 4);
 118 }
 119
 120 static int __init pas_setup_mce_regs(void)
 121 {
 122         struct pci_dev *dev;
 123         int reg;
 124
 125         if (!machine_is(pasemi))
 126                 return -ENODEV;
 127
 128         /* Remap various SoC status registers for use by the MCE handler */
 129
 130         reg = 0;
 131
 132         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, NULL);
 133         while (dev && reg < MAX_MCE_REGS) {
 134                 mce_regs[reg].name = kasprintf(GFP_KERNEL,
 135                                                 "mc%d_mcdebug_errsta", reg);
 136                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x730);
 137                 dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa00a, dev);
 138                 reg++;
 139         }
 140
 141         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL);
 142         if (dev && reg+4 < MAX_MCE_REGS) {
 143                 mce_regs[reg].name = "iobdbg_IntStatus1";
 144                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x438);
 145                 reg++;
 146                 mce_regs[reg].name = "iobdbg_IOCTbusIntDbgReg";
 147                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x454);
 148                 reg++;
 149                 mce_regs[reg].name = "iobiom_IntStatus";
 150                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc10);
 151                 reg++;
 152                 mce_regs[reg].name = "iobiom_IntDbgReg";
 153                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0xc1c);
 154                 reg++;
 155         }
 156
 157         dev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa009, NULL);
 158         if (dev && reg+2 < MAX_MCE_REGS) {
 159                 mce_regs[reg].name = "l2csts_IntStatus";
 160                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x200);
 161                 reg++;
 162                 mce_regs[reg].name = "l2csts_Cnt";
 163                 mce_regs[reg].addr = pasemi_pci_getcfgaddr(dev, 0x214);
 164                 reg++;
 165         }
 166
 167         num_mce_regs = reg;
 168
 169         return 0;
 170 }
 171 device_initcall(pas_setup_mce_regs);
 172
 173 static __init void pas_init_IRQ(void)
 174 {
 175         struct device_node *np;
 176         struct device_node *root, *mpic_node;
 177         unsigned long openpic_addr;
 178         const unsigned int *opprop;
 179         int naddr, opplen;
 180         struct mpic *mpic;
 181
 182         mpic_node = NULL;
 183
 184         for_each_node_by_type(np, "interrupt-controller")
 185                 if (of_device_is_compatible(np, "open-pic")) {
 186                         mpic_node = np;
 187                         break;
 188                 }
 189         if (!mpic_node)
 190                 for_each_node_by_type(np, "open-pic") {
 191                         mpic_node = np;
 192                         break;
 193                 }
 194         if (!mpic_node) {
 195                 printk(KERN_ERR
 196                         "Failed to locate the MPIC interrupt controller\n");
 197                 return;
 198         }
 199
 200         /* Find address list in /platform-open-pic */
 201         root = of_find_node_by_path("/");
 202         naddr = of_n_addr_cells(root);
 203         opprop = of_get_property(root, "platform-open-pic", &opplen);
 204         if (!opprop) {
 205                 printk(KERN_ERR "No platform-open-pic property.\n");
 206                 of_node_put(root);
 207                 return;
 208         }
 209         openpic_addr = of_read_number(opprop, naddr);
 210         printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 211
 212         mpic = mpic_alloc(mpic_node, openpic_addr,
 213                           MPIC_PRIMARY|MPIC_LARGE_VECTORS|MPIC_WANTS_RESET,
 214                           0, 0, " PAS-OPIC  ");
 215         BUG_ON(!mpic);
 216
 217         mpic_assign_isu(mpic, 0, openpic_addr + 0x10000);
 218         mpic_init(mpic);
 219         of_node_put(mpic_node);
 220         of_node_put(root);
 221 }
 222
 223 static void __init pas_progress(char *s, unsigned short hex)
 224 {
 225         printk("[%04x] : %s\n", hex, s ? s : "");
 226 }
 227
 228
 229 static int pas_machine_check_handler(struct pt_regs *regs)
 230 {
 231         int cpu = smp_processor_id();
 232         unsigned long srr0, srr1, dsisr;
 233         int dump_slb = 0;
 234         int i;
 235
 236         srr0 = regs->nip;
 237         srr1 = regs->msr;
 238         dsisr = mfspr(SPRN_DSISR);
 239         printk(KERN_ERR "Machine Check on CPU %d\n", cpu);
 240         printk(KERN_ERR "SRR0  0x%016lx SRR1 0x%016lx\n", srr0, srr1);
 241         printk(KERN_ERR "DSISR 0x%016lx DAR  0x%016lx\n", dsisr, regs->dar);
 242         printk(KERN_ERR "BER   0x%016lx MER  0x%016lx\n", mfspr(SPRN_PA6T_BER),
 243                 mfspr(SPRN_PA6T_MER));
 244         printk(KERN_ERR "IER   0x%016lx DER  0x%016lx\n", mfspr(SPRN_PA6T_IER),
 245                 mfspr(SPRN_PA6T_DER));
 246         printk(KERN_ERR "Cause:\n");
 247
 248         if (srr1 & 0x200000)
 249                 printk(KERN_ERR "Signalled by SDC\n");
 250
 251         if (srr1 & 0x100000) {
 252                 printk(KERN_ERR "Load/Store detected error:\n");
 253                 if (dsisr & 0x8000)
 254                         printk(KERN_ERR "D-cache ECC double-bit error or bus error\n");
 255                 if (dsisr & 0x4000)
 256                         printk(KERN_ERR "LSU snoop response error\n");
 257                 if (dsisr & 0x2000) {
 258                         printk(KERN_ERR "MMU SLB multi-hit or invalid B field\n");
 259                         dump_slb = 1;
 260                 }
 261                 if (dsisr & 0x1000)
 262                         printk(KERN_ERR "Recoverable Duptags\n");
 263                 if (dsisr & 0x800)
 264                         printk(KERN_ERR "Recoverable D-cache parity error count overflow\n");
 265                 if (dsisr & 0x400)
 266                         printk(KERN_ERR "TLB parity error count overflow\n");
 267         }
 268
 269         if (srr1 & 0x80000)
 270                 printk(KERN_ERR "Bus Error\n");
 271
 272         if (srr1 & 0x40000) {
 273                 printk(KERN_ERR "I-side SLB multiple hit\n");
 274                 dump_slb = 1;
 275         }
 276
 277         if (srr1 & 0x20000)
 278                 printk(KERN_ERR "I-cache parity error hit\n");
 279
 280         if (num_mce_regs == 0)
 281                 printk(KERN_ERR "No MCE registers mapped yet, can't dump\n");
 282         else
 283                 printk(KERN_ERR "SoC debug registers:\n");
 284
 285         for (i = 0; i < num_mce_regs; i++)
 286                 printk(KERN_ERR "%s: 0x%08x\n", mce_regs[i].name,
 287                         in_le32(mce_regs[i].addr));
 288
 289         if (dump_slb) {
 290                 unsigned long e, v;
 291                 int i;
 292
 293                 printk(KERN_ERR "slb contents:\n");
 294                 for (i = 0; i < SLB_NUM_ENTRIES; i++) {
 295                         asm volatile("slbmfee  %0,%1" : "=r" (e) : "r" (i));
 296                         asm volatile("slbmfev  %0,%1" : "=r" (v) : "r" (i));
 297                         printk(KERN_ERR "%02d %016lx %016lx\n", i, e, v);
 298                 }
 299         }
 300
 301
 302         /* SRR1[62] is from MSR[62] if recoverable, so pass that back */
 303         return !!(srr1 & 0x2);
 304 }
 305
 306 static void __init pas_init_early(void)
 307 {
 308         iommu_init_early_pasemi();
 309 }
 310
 311 static struct of_device_id pasemi_bus_ids[] = {
 312         { .type = "sdc", },
 313         {},
 314 };
 315
 316 static int __init pasemi_publish_devices(void)
 317 {
 318         if (!machine_is(pasemi))
 319                 return 0;
 320
 321         /* Publish OF platform devices for SDC and other non-PCI devices */
 322         of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
 323
 324         return 0;
 325 }
 326 device_initcall(pasemi_publish_devices);
 327
 328
 329 /*
 330  * Called very early, MMU is off, device-tree isn't unflattened
 331  */
 332 static int __init pas_probe(void)
 333 {
 334         unsigned long root = of_get_flat_dt_root();
 335
 336         if (!of_flat_dt_is_compatible(root, "PA6T-1682M"))
 337                 return 0;
 338
 339         hpte_init_native();
 340
 341         alloc_iobmap_l2();
 342
 343         return 1;
 344 }
 345
 346 define_machine(pasemi) {
 347         .name                   = "PA Semi PA6T-1682M",
 348         .probe                  = pas_probe,
 349         .setup_arch             = pas_setup_arch,
 350         .init_early             = pas_init_early,
 351         .init_IRQ               = pas_init_IRQ,
 352         .get_irq                = mpic_get_irq,
 353         .restart                = pas_restart,
 354         .get_boot_time          = pas_get_boot_time,
 355         .calibrate_decr         = generic_calibrate_decr,
 356         .progress               = pas_progress,
 357         .machine_check_exception = pas_machine_check_handler,
 358 };