Pileus Git - ~andy/linux/blob - arch/mips/mti-malta/malta-int.c

   1 /*
   2  * Carsten Langgaard, carstenl@mips.com
   3  * Copyright (C) 2000, 2001, 2004 MIPS Technologies, Inc.
   4  * Copyright (C) 2001 Ralf Baechle
   5  *
   6  *  This program is free software; you can distribute it and/or modify it
   7  *  under the terms of the GNU General Public License (Version 2) as
   8  *  published by the Free Software Foundation.
   9  *
  10  *  This program is distributed in the hope it will be useful, but WITHOUT
  11  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  *  for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  18  *
  19  * Routines for generic manipulation of the interrupts found on the MIPS
  20  * Malta board.
  21  * The interrupt controller is located in the South Bridge a PIIX4 device
  22  * with two internal 82C95 interrupt controllers.
  23  */
  24 #include <linux/init.h>
  25 #include <linux/irq.h>
  26 #include <linux/sched.h>
  27 #include <linux/smp.h>
  28 #include <linux/interrupt.h>
  29 #include <linux/io.h>
  30 #include <linux/kernel_stat.h>
  31 #include <linux/kernel.h>
  32 #include <linux/random.h>
  33
  34 #include <asm/traps.h>
  35 #include <asm/i8259.h>
  36 #include <asm/irq_cpu.h>
  37 #include <asm/irq_regs.h>
  38 #include <asm/mips-boards/malta.h>
  39 #include <asm/mips-boards/maltaint.h>
  40 #include <asm/mips-boards/piix4.h>
  41 #include <asm/gt64120.h>
  42 #include <asm/mips-boards/generic.h>
  43 #include <asm/mips-boards/msc01_pci.h>
  44 #include <asm/msc01_ic.h>
  45 #include <asm/gic.h>
  46 #include <asm/gcmpregs.h>
  47 #include <asm/setup.h>
  48
  49 int gcmp_present = -1;
  50 int gic_present;
  51 static unsigned long _msc01_biu_base;
  52 static unsigned long _gcmp_base;
  53 static unsigned int ipi_map[NR_CPUS];
  54
  55 static DEFINE_RAW_SPINLOCK(mips_irq_lock);
  56
  57 static inline int mips_pcibios_iack(void)
  58 {
  59         int irq;
  60
  61         /*
  62          * Determine highest priority pending interrupt by performing
  63          * a PCI Interrupt Acknowledge cycle.
  64          */
  65         switch (mips_revision_sconid) {
  66         case MIPS_REVISION_SCON_SOCIT:
  67         case MIPS_REVISION_SCON_ROCIT:
  68         case MIPS_REVISION_SCON_SOCITSC:
  69         case MIPS_REVISION_SCON_SOCITSCP:
  70                 MSC_READ(MSC01_PCI_IACK, irq);
  71                 irq &= 0xff;
  72                 break;
  73         case MIPS_REVISION_SCON_GT64120:
  74                 irq = GT_READ(GT_PCI0_IACK_OFS);
  75                 irq &= 0xff;
  76                 break;
  77         case MIPS_REVISION_SCON_BONITO:
  78                 /* The following will generate a PCI IACK cycle on the
  79                  * Bonito controller. It's a little bit kludgy, but it
  80                  * was the easiest way to implement it in hardware at
  81                  * the given time.
  82                  */
  83                 BONITO_PCIMAP_CFG = 0x20000;
  84
  85                 /* Flush Bonito register block */
  86                 (void) BONITO_PCIMAP_CFG;
  87                 iob();    /* sync */
  88
  89                 irq = __raw_readl((u32 *)_pcictrl_bonito_pcicfg);
  90                 iob();    /* sync */
  91                 irq &= 0xff;
  92                 BONITO_PCIMAP_CFG = 0;
  93                 break;
  94         default:
  95                 printk(KERN_WARNING "Unknown system controller.\n");
  96                 return -1;
  97         }
  98         return irq;
  99 }
 100
 101 static inline int get_int(void)
 102 {
 103         unsigned long flags;
 104         int irq;
 105         raw_spin_lock_irqsave(&mips_irq_lock, flags);
 106
 107         irq = mips_pcibios_iack();
 108
 109         /*
 110          * The only way we can decide if an interrupt is spurious
 111          * is by checking the 8259 registers.  This needs a spinlock
 112          * on an SMP system,  so leave it up to the generic code...
 113          */
 114
 115         raw_spin_unlock_irqrestore(&mips_irq_lock, flags);
 116
 117         return irq;
 118 }
 119
 120 static void malta_hw0_irqdispatch(void)
 121 {
 122         int irq;
 123
 124         irq = get_int();
 125         if (irq < 0) {
 126                 /* interrupt has already been cleared */
 127                 return;
 128         }
 129
 130         do_IRQ(MALTA_INT_BASE + irq);
 131 }
 132
 133 static void malta_ipi_irqdispatch(void)
 134 {
 135         int irq;
 136
 137         irq = gic_get_int();
 138         if (irq < 0)
 139                 return;  /* interrupt has already been cleared */
 140
 141         do_IRQ(MIPS_GIC_IRQ_BASE + irq);
 142 }
 143
 144 static void corehi_irqdispatch(void)
 145 {
 146         unsigned int intedge, intsteer, pcicmd, pcibadaddr;
 147         unsigned int pcimstat, intisr, inten, intpol;
 148         unsigned int intrcause, datalo, datahi;
 149         struct pt_regs *regs = get_irq_regs();
 150
 151         printk(KERN_EMERG "CoreHI interrupt, shouldn't happen, we die here!\n");
 152         printk(KERN_EMERG "epc   : %08lx\nStatus: %08lx\n"
 153                         "Cause : %08lx\nbadVaddr : %08lx\n",
 154                         regs->cp0_epc, regs->cp0_status,
 155                         regs->cp0_cause, regs->cp0_badvaddr);
 156
 157         /* Read all the registers and then print them as there is a
 158            problem with interspersed printk's upsetting the Bonito controller.
 159            Do it for the others too.
 160         */
 161
 162         switch (mips_revision_sconid) {
 163         case MIPS_REVISION_SCON_SOCIT:
 164         case MIPS_REVISION_SCON_ROCIT:
 165         case MIPS_REVISION_SCON_SOCITSC:
 166         case MIPS_REVISION_SCON_SOCITSCP:
 167                 ll_msc_irq();
 168                 break;
 169         case MIPS_REVISION_SCON_GT64120:
 170                 intrcause = GT_READ(GT_INTRCAUSE_OFS);
 171                 datalo = GT_READ(GT_CPUERR_ADDRLO_OFS);
 172                 datahi = GT_READ(GT_CPUERR_ADDRHI_OFS);
 173                 printk(KERN_EMERG "GT_INTRCAUSE = %08x\n", intrcause);
 174                 printk(KERN_EMERG "GT_CPUERR_ADDR = %02x%08x\n",
 175                                 datahi, datalo);
 176                 break;
 177         case MIPS_REVISION_SCON_BONITO:
 178                 pcibadaddr = BONITO_PCIBADADDR;
 179                 pcimstat = BONITO_PCIMSTAT;
 180                 intisr = BONITO_INTISR;
 181                 inten = BONITO_INTEN;
 182                 intpol = BONITO_INTPOL;
 183                 intedge = BONITO_INTEDGE;
 184                 intsteer = BONITO_INTSTEER;
 185                 pcicmd = BONITO_PCICMD;
 186                 printk(KERN_EMERG "BONITO_INTISR = %08x\n", intisr);
 187                 printk(KERN_EMERG "BONITO_INTEN = %08x\n", inten);
 188                 printk(KERN_EMERG "BONITO_INTPOL = %08x\n", intpol);
 189                 printk(KERN_EMERG "BONITO_INTEDGE = %08x\n", intedge);
 190                 printk(KERN_EMERG "BONITO_INTSTEER = %08x\n", intsteer);
 191                 printk(KERN_EMERG "BONITO_PCICMD = %08x\n", pcicmd);
 192                 printk(KERN_EMERG "BONITO_PCIBADADDR = %08x\n", pcibadaddr);
 193                 printk(KERN_EMERG "BONITO_PCIMSTAT = %08x\n", pcimstat);
 194                 break;
 195         }
 196
 197         die("CoreHi interrupt", regs);
 198 }
 199
 200 static inline int clz(unsigned long x)
 201 {
 202         __asm__(
 203         "       .set    push                                    \n"
 204         "       .set    mips32                                  \n"
 205         "       clz     %0, %1                                  \n"
 206         "       .set    pop                                     \n"
 207         : "=r" (x)
 208         : "r" (x));
 209
 210         return x;
 211 }
 212
 213 /*
 214  * Version of ffs that only looks at bits 12..15.
 215  */
 216 static inline unsigned int irq_ffs(unsigned int pending)
 217 {
 218 #if defined(CONFIG_CPU_MIPS32) || defined(CONFIG_CPU_MIPS64)
 219         return -clz(pending) + 31 - CAUSEB_IP;
 220 #else
 221         unsigned int a0 = 7;
 222         unsigned int t0;
 223
 224         t0 = pending & 0xf000;
 225         t0 = t0 < 1;
 226         t0 = t0 << 2;
 227         a0 = a0 - t0;
 228         pending = pending << t0;
 229
 230         t0 = pending & 0xc000;
 231         t0 = t0 < 1;
 232         t0 = t0 << 1;
 233         a0 = a0 - t0;
 234         pending = pending << t0;
 235
 236         t0 = pending & 0x8000;
 237         t0 = t0 < 1;
 238         /* t0 = t0 << 2; */
 239         a0 = a0 - t0;
 240         /* pending = pending << t0; */
 241
 242         return a0;
 243 #endif
 244 }
 245
 246 /*
 247  * IRQs on the Malta board look basically (barring software IRQs which we
 248  * don't use at all and all external interrupt sources are combined together
 249  * on hardware interrupt 0 (MIPS IRQ 2)) like:
 250  *
 251  *      MIPS IRQ        Source
 252  *      --------        ------
 253  *             0        Software (ignored)
 254  *             1        Software (ignored)
 255  *             2        Combined hardware interrupt (hw0)
 256  *             3        Hardware (ignored)
 257  *             4        Hardware (ignored)
 258  *             5        Hardware (ignored)
 259  *             6        Hardware (ignored)
 260  *             7        R4k timer (what we use)
 261  *
 262  * We handle the IRQ according to _our_ priority which is:
 263  *
 264  * Highest ----     R4k Timer
 265  * Lowest  ----     Combined hardware interrupt
 266  *
 267  * then we just return, if multiple IRQs are pending then we will just take
 268  * another exception, big deal.
 269  */
 270
 271 asmlinkage void plat_irq_dispatch(void)
 272 {
 273         unsigned int pending = read_c0_cause() & read_c0_status() & ST0_IM;
 274         int irq;
 275
 276         irq = irq_ffs(pending);
 277
 278         if (irq == MIPSCPU_INT_I8259A)
 279                 malta_hw0_irqdispatch();
 280         else if (gic_present && ((1 << irq) & ipi_map[smp_processor_id()]))
 281                 malta_ipi_irqdispatch();
 282         else if (irq >= 0)
 283                 do_IRQ(MIPS_CPU_IRQ_BASE + irq);
 284         else
 285                 spurious_interrupt();
 286 }
 287
 288 #ifdef CONFIG_MIPS_MT_SMP
 289
 290
 291 #define GIC_MIPS_CPU_IPI_RESCHED_IRQ    3
 292 #define GIC_MIPS_CPU_IPI_CALL_IRQ       4
 293
 294 #define MIPS_CPU_IPI_RESCHED_IRQ 0      /* SW int 0 for resched */
 295 #define C_RESCHED C_SW0
 296 #define MIPS_CPU_IPI_CALL_IRQ 1         /* SW int 1 for resched */
 297 #define C_CALL C_SW1
 298 static int cpu_ipi_resched_irq, cpu_ipi_call_irq;
 299
 300 static void ipi_resched_dispatch(void)
 301 {
 302         do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ);
 303 }
 304
 305 static void ipi_call_dispatch(void)
 306 {
 307         do_IRQ(MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ);
 308 }
 309
 310 static irqreturn_t ipi_resched_interrupt(int irq, void *dev_id)
 311 {
 312         scheduler_ipi();
 313
 314         return IRQ_HANDLED;
 315 }
 316
 317 static irqreturn_t ipi_call_interrupt(int irq, void *dev_id)
 318 {
 319         smp_call_function_interrupt();
 320
 321         return IRQ_HANDLED;
 322 }
 323
 324 static struct irqaction irq_resched = {
 325         .handler        = ipi_resched_interrupt,
 326         .flags          = IRQF_PERCPU,
 327         .name           = "IPI_resched"
 328 };
 329
 330 static struct irqaction irq_call = {
 331         .handler        = ipi_call_interrupt,
 332         .flags          = IRQF_PERCPU,
 333         .name           = "IPI_call"
 334 };
 335 #endif /* CONFIG_MIPS_MT_SMP */
 336
 337 static int gic_resched_int_base;
 338 static int gic_call_int_base;
 339 #define GIC_RESCHED_INT(cpu) (gic_resched_int_base+(cpu))
 340 #define GIC_CALL_INT(cpu) (gic_call_int_base+(cpu))
 341
 342 unsigned int plat_ipi_call_int_xlate(unsigned int cpu)
 343 {
 344         return GIC_CALL_INT(cpu);
 345 }
 346
 347 unsigned int plat_ipi_resched_int_xlate(unsigned int cpu)
 348 {
 349         return GIC_RESCHED_INT(cpu);
 350 }
 351
 352 static struct irqaction i8259irq = {
 353         .handler = no_action,
 354         .name = "XT-PIC cascade",
 355         .flags = IRQF_NO_THREAD,
 356 };
 357
 358 static struct irqaction corehi_irqaction = {
 359         .handler = no_action,
 360         .name = "CoreHi",
 361         .flags = IRQF_NO_THREAD,
 362 };
 363
 364 static msc_irqmap_t __initdata msc_irqmap[] = {
 365         {MSC01C_INT_TMR,                MSC01_IRQ_EDGE, 0},
 366         {MSC01C_INT_PCI,                MSC01_IRQ_LEVEL, 0},
 367 };
 368 static int __initdata msc_nr_irqs = ARRAY_SIZE(msc_irqmap);
 369
 370 static msc_irqmap_t __initdata msc_eicirqmap[] = {
 371         {MSC01E_INT_SW0,                MSC01_IRQ_LEVEL, 0},
 372         {MSC01E_INT_SW1,                MSC01_IRQ_LEVEL, 0},
 373         {MSC01E_INT_I8259A,             MSC01_IRQ_LEVEL, 0},
 374         {MSC01E_INT_SMI,                MSC01_IRQ_LEVEL, 0},
 375         {MSC01E_INT_COREHI,             MSC01_IRQ_LEVEL, 0},
 376         {MSC01E_INT_CORELO,             MSC01_IRQ_LEVEL, 0},
 377         {MSC01E_INT_TMR,                MSC01_IRQ_EDGE, 0},
 378         {MSC01E_INT_PCI,                MSC01_IRQ_LEVEL, 0},
 379         {MSC01E_INT_PERFCTR,            MSC01_IRQ_LEVEL, 0},
 380         {MSC01E_INT_CPUCTR,             MSC01_IRQ_LEVEL, 0}
 381 };
 382
 383 static int __initdata msc_nr_eicirqs = ARRAY_SIZE(msc_eicirqmap);
 384
 385 /*
 386  * This GIC specific tabular array defines the association between External
 387  * Interrupts and CPUs/Core Interrupts. The nature of the External
 388  * Interrupts is also defined here - polarity/trigger.
 389  */
 390
 391 #define GIC_CPU_NMI GIC_MAP_TO_NMI_MSK
 392 #define X GIC_UNUSED
 393
 394 static struct gic_intr_map gic_intr_map[GIC_NUM_INTRS] = {
 395         { X, X,            X,           X,              0 },
 396         { X, X,            X,           X,              0 },
 397         { X, X,            X,           X,              0 },
 398         { 0, GIC_CPU_INT0, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 399         { 0, GIC_CPU_INT1, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 400         { 0, GIC_CPU_INT2, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 401         { 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 402         { 0, GIC_CPU_INT4, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 403         { 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 404         { 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 405         { X, X,            X,           X,              0 },
 406         { X, X,            X,           X,              0 },
 407         { 0, GIC_CPU_INT3, GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 408         { 0, GIC_CPU_NMI,  GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 409         { 0, GIC_CPU_NMI,  GIC_POL_POS, GIC_TRIG_LEVEL, GIC_FLAG_TRANSPARENT },
 410         { X, X,            X,           X,              0 },
 411         /* The remainder of this table is initialised by fill_ipi_map */
 412 };
 413 #undef X
 414
 415 /*
 416  * GCMP needs to be detected before any SMP initialisation
 417  */
 418 int __init gcmp_probe(unsigned long addr, unsigned long size)
 419 {
 420         if (mips_revision_sconid != MIPS_REVISION_SCON_ROCIT) {
 421                 gcmp_present = 0;
 422                 return gcmp_present;
 423         }
 424
 425         if (gcmp_present >= 0)
 426                 return gcmp_present;
 427
 428         _gcmp_base = (unsigned long) ioremap_nocache(GCMP_BASE_ADDR, GCMP_ADDRSPACE_SZ);
 429         _msc01_biu_base = (unsigned long) ioremap_nocache(MSC01_BIU_REG_BASE, MSC01_BIU_ADDRSPACE_SZ);
 430         gcmp_present = (GCMPGCB(GCMPB) & GCMP_GCB_GCMPB_GCMPBASE_MSK) == GCMP_BASE_ADDR;
 431
 432         if (gcmp_present)
 433                 pr_debug("GCMP present\n");
 434         return gcmp_present;
 435 }
 436
 437 /* Return the number of IOCU's present */
 438 int __init gcmp_niocu(void)
 439 {
 440   return gcmp_present ?
 441     (GCMPGCB(GC) & GCMP_GCB_GC_NUMIOCU_MSK) >> GCMP_GCB_GC_NUMIOCU_SHF :
 442     0;
 443 }
 444
 445 /* Set GCMP region attributes */
 446 void __init gcmp_setregion(int region, unsigned long base,
 447                            unsigned long mask, int type)
 448 {
 449         GCMPGCBn(CMxBASE, region) = base;
 450         GCMPGCBn(CMxMASK, region) = mask | type;
 451 }
 452
 453 #if defined(CONFIG_MIPS_MT_SMP)
 454 static void __init fill_ipi_map1(int baseintr, int cpu, int cpupin)
 455 {
 456         int intr = baseintr + cpu;
 457         gic_intr_map[intr].cpunum = cpu;
 458         gic_intr_map[intr].pin = cpupin;
 459         gic_intr_map[intr].polarity = GIC_POL_POS;
 460         gic_intr_map[intr].trigtype = GIC_TRIG_EDGE;
 461         gic_intr_map[intr].flags = GIC_FLAG_IPI;
 462         ipi_map[cpu] |= (1 << (cpupin + 2));
 463 }
 464
 465 static void __init fill_ipi_map(void)
 466 {
 467         int cpu;
 468
 469         for (cpu = 0; cpu < NR_CPUS; cpu++) {
 470                 fill_ipi_map1(gic_resched_int_base, cpu, GIC_CPU_INT1);
 471                 fill_ipi_map1(gic_call_int_base, cpu, GIC_CPU_INT2);
 472         }
 473 }
 474 #endif
 475
 476 void __init arch_init_ipiirq(int irq, struct irqaction *action)
 477 {
 478         setup_irq(irq, action);
 479         irq_set_handler(irq, handle_percpu_irq);
 480 }
 481
 482 void __init arch_init_irq(void)
 483 {
 484         init_i8259_irqs();
 485
 486         if (!cpu_has_veic)
 487                 mips_cpu_irq_init();
 488
 489         if (gcmp_present)  {
 490                 GCMPGCB(GICBA) = GIC_BASE_ADDR | GCMP_GCB_GICBA_EN_MSK;
 491                 gic_present = 1;
 492         } else {
 493                 if (mips_revision_sconid == MIPS_REVISION_SCON_ROCIT) {
 494                         _msc01_biu_base = (unsigned long)
 495                                         ioremap_nocache(MSC01_BIU_REG_BASE,
 496                                                 MSC01_BIU_ADDRSPACE_SZ);
 497                         gic_present = (REG(_msc01_biu_base, MSC01_SC_CFG) &
 498                                         MSC01_SC_CFG_GICPRES_MSK) >>
 499                                         MSC01_SC_CFG_GICPRES_SHF;
 500                 }
 501         }
 502         if (gic_present)
 503                 pr_debug("GIC present\n");
 504
 505         switch (mips_revision_sconid) {
 506         case MIPS_REVISION_SCON_SOCIT:
 507         case MIPS_REVISION_SCON_ROCIT:
 508                 if (cpu_has_veic)
 509                         init_msc_irqs(MIPS_MSC01_IC_REG_BASE,
 510                                         MSC01E_INT_BASE, msc_eicirqmap,
 511                                         msc_nr_eicirqs);
 512                 else
 513                         init_msc_irqs(MIPS_MSC01_IC_REG_BASE,
 514                                         MSC01C_INT_BASE, msc_irqmap,
 515                                         msc_nr_irqs);
 516                 break;
 517
 518         case MIPS_REVISION_SCON_SOCITSC:
 519         case MIPS_REVISION_SCON_SOCITSCP:
 520                 if (cpu_has_veic)
 521                         init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE,
 522                                         MSC01E_INT_BASE, msc_eicirqmap,
 523                                         msc_nr_eicirqs);
 524                 else
 525                         init_msc_irqs(MIPS_SOCITSC_IC_REG_BASE,
 526                                         MSC01C_INT_BASE, msc_irqmap,
 527                                         msc_nr_irqs);
 528         }
 529
 530         if (cpu_has_veic) {
 531                 set_vi_handler(MSC01E_INT_I8259A, malta_hw0_irqdispatch);
 532                 set_vi_handler(MSC01E_INT_COREHI, corehi_irqdispatch);
 533                 setup_irq(MSC01E_INT_BASE+MSC01E_INT_I8259A, &i8259irq);
 534                 setup_irq(MSC01E_INT_BASE+MSC01E_INT_COREHI, &corehi_irqaction);
 535         } else if (cpu_has_vint) {
 536                 set_vi_handler(MIPSCPU_INT_I8259A, malta_hw0_irqdispatch);
 537                 set_vi_handler(MIPSCPU_INT_COREHI, corehi_irqdispatch);
 538 #ifdef CONFIG_MIPS_MT_SMTC
 539                 setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq,
 540                         (0x100 << MIPSCPU_INT_I8259A));
 541                 setup_irq_smtc(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
 542                         &corehi_irqaction, (0x100 << MIPSCPU_INT_COREHI));
 543                 /*
 544                  * Temporary hack to ensure that the subsidiary device
 545                  * interrupts coing in via the i8259A, but associated
 546                  * with low IRQ numbers, will restore the Status.IM
 547                  * value associated with the i8259A.
 548                  */
 549                 {
 550                         int i;
 551
 552                         for (i = 0; i < 16; i++)
 553                                 irq_hwmask[i] = (0x100 << MIPSCPU_INT_I8259A);
 554                 }
 555 #else /* Not SMTC */
 556                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
 557                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
 558                                                 &corehi_irqaction);
 559 #endif /* CONFIG_MIPS_MT_SMTC */
 560         } else {
 561                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_I8259A, &i8259irq);
 562                 setup_irq(MIPS_CPU_IRQ_BASE+MIPSCPU_INT_COREHI,
 563                                                 &corehi_irqaction);
 564         }
 565
 566         if (gic_present) {
 567                 /* FIXME */
 568                 int i;
 569 #if defined(CONFIG_MIPS_MT_SMP)
 570                 gic_call_int_base = GIC_NUM_INTRS - NR_CPUS;
 571                 gic_resched_int_base = gic_call_int_base - NR_CPUS;
 572                 fill_ipi_map();
 573 #endif
 574                 gic_init(GIC_BASE_ADDR, GIC_ADDRSPACE_SZ, gic_intr_map,
 575                                 ARRAY_SIZE(gic_intr_map), MIPS_GIC_IRQ_BASE);
 576                 if (!gcmp_present) {
 577                         /* Enable the GIC */
 578                         i = REG(_msc01_biu_base, MSC01_SC_CFG);
 579                         REG(_msc01_biu_base, MSC01_SC_CFG) =
 580                                 (i | (0x1 << MSC01_SC_CFG_GICENA_SHF));
 581                         pr_debug("GIC Enabled\n");
 582                 }
 583 #if defined(CONFIG_MIPS_MT_SMP)
 584                 /* set up ipi interrupts */
 585                 if (cpu_has_vint) {
 586                         set_vi_handler(MIPSCPU_INT_IPI0, malta_ipi_irqdispatch);
 587                         set_vi_handler(MIPSCPU_INT_IPI1, malta_ipi_irqdispatch);
 588                 }
 589                 /* Argh.. this really needs sorting out.. */
 590                 printk("CPU%d: status register was %08x\n", smp_processor_id(), read_c0_status());
 591                 write_c0_status(read_c0_status() | STATUSF_IP3 | STATUSF_IP4);
 592                 printk("CPU%d: status register now %08x\n", smp_processor_id(), read_c0_status());
 593                 write_c0_status(0x1100dc00);
 594                 printk("CPU%d: status register frc %08x\n", smp_processor_id(), read_c0_status());
 595                 for (i = 0; i < NR_CPUS; i++) {
 596                         arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
 597                                          GIC_RESCHED_INT(i), &irq_resched);
 598                         arch_init_ipiirq(MIPS_GIC_IRQ_BASE +
 599                                          GIC_CALL_INT(i), &irq_call);
 600                 }
 601 #endif
 602         } else {
 603 #if defined(CONFIG_MIPS_MT_SMP)
 604                 /* set up ipi interrupts */
 605                 if (cpu_has_veic) {
 606                         set_vi_handler (MSC01E_INT_SW0, ipi_resched_dispatch);
 607                         set_vi_handler (MSC01E_INT_SW1, ipi_call_dispatch);
 608                         cpu_ipi_resched_irq = MSC01E_INT_SW0;
 609                         cpu_ipi_call_irq = MSC01E_INT_SW1;
 610                 } else {
 611                         if (cpu_has_vint) {
 612                                 set_vi_handler (MIPS_CPU_IPI_RESCHED_IRQ, ipi_resched_dispatch);
 613                                 set_vi_handler (MIPS_CPU_IPI_CALL_IRQ, ipi_call_dispatch);
 614                         }
 615                         cpu_ipi_resched_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_RESCHED_IRQ;
 616                         cpu_ipi_call_irq = MIPS_CPU_IRQ_BASE + MIPS_CPU_IPI_CALL_IRQ;
 617                 }
 618                 arch_init_ipiirq(cpu_ipi_resched_irq, &irq_resched);
 619                 arch_init_ipiirq(cpu_ipi_call_irq, &irq_call);
 620 #endif
 621         }
 622 }
 623
 624 void malta_be_init(void)
 625 {
 626         if (gcmp_present) {
 627                 /* Could change CM error mask register */
 628         }
 629 }
 630
 631
 632 static char *tr[8] = {
 633         "mem",  "gcr",  "gic",  "mmio",
 634         "0x04", "0x05", "0x06", "0x07"
 635 };
 636
 637 static char *mcmd[32] = {
 638         [0x00] = "0x00",
 639         [0x01] = "Legacy Write",
 640         [0x02] = "Legacy Read",
 641         [0x03] = "0x03",
 642         [0x04] = "0x04",
 643         [0x05] = "0x05",
 644         [0x06] = "0x06",
 645         [0x07] = "0x07",
 646         [0x08] = "Coherent Read Own",
 647         [0x09] = "Coherent Read Share",
 648         [0x0a] = "Coherent Read Discard",
 649         [0x0b] = "Coherent Ready Share Always",
 650         [0x0c] = "Coherent Upgrade",
 651         [0x0d] = "Coherent Writeback",
 652         [0x0e] = "0x0e",
 653         [0x0f] = "0x0f",
 654         [0x10] = "Coherent Copyback",
 655         [0x11] = "Coherent Copyback Invalidate",
 656         [0x12] = "Coherent Invalidate",
 657         [0x13] = "Coherent Write Invalidate",
 658         [0x14] = "Coherent Completion Sync",
 659         [0x15] = "0x15",
 660         [0x16] = "0x16",
 661         [0x17] = "0x17",
 662         [0x18] = "0x18",
 663         [0x19] = "0x19",
 664         [0x1a] = "0x1a",
 665         [0x1b] = "0x1b",
 666         [0x1c] = "0x1c",
 667         [0x1d] = "0x1d",
 668         [0x1e] = "0x1e",
 669         [0x1f] = "0x1f"
 670 };
 671
 672 static char *core[8] = {
 673         "Invalid/OK",   "Invalid/Data",
 674         "Shared/OK",    "Shared/Data",
 675         "Modified/OK",  "Modified/Data",
 676         "Exclusive/OK", "Exclusive/Data"
 677 };
 678
 679 static char *causes[32] = {
 680         "None", "GC_WR_ERR", "GC_RD_ERR", "COH_WR_ERR",
 681         "COH_RD_ERR", "MMIO_WR_ERR", "MMIO_RD_ERR", "0x07",
 682         "0x08", "0x09", "0x0a", "0x0b",
 683         "0x0c", "0x0d", "0x0e", "0x0f",
 684         "0x10", "0x11", "0x12", "0x13",
 685         "0x14", "0x15", "0x16", "INTVN_WR_ERR",
 686         "INTVN_RD_ERR", "0x19", "0x1a", "0x1b",
 687         "0x1c", "0x1d", "0x1e", "0x1f"
 688 };
 689
 690 int malta_be_handler(struct pt_regs *regs, int is_fixup)
 691 {
 692         /* This duplicates the handling in do_be which seems wrong */
 693         int retval = is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
 694
 695         if (gcmp_present) {
 696                 unsigned long cm_error = GCMPGCB(GCMEC);
 697                 unsigned long cm_addr = GCMPGCB(GCMEA);
 698                 unsigned long cm_other = GCMPGCB(GCMEO);
 699                 unsigned long cause, ocause;
 700                 char buf[256];
 701
 702                 cause = (cm_error & GCMP_GCB_GMEC_ERROR_TYPE_MSK);
 703                 if (cause != 0) {
 704                         cause >>= GCMP_GCB_GMEC_ERROR_TYPE_SHF;
 705                         if (cause < 16) {
 706                                 unsigned long cca_bits = (cm_error >> 15) & 7;
 707                                 unsigned long tr_bits = (cm_error >> 12) & 7;
 708                                 unsigned long mcmd_bits = (cm_error >> 7) & 0x1f;
 709                                 unsigned long stag_bits = (cm_error >> 3) & 15;
 710                                 unsigned long sport_bits = (cm_error >> 0) & 7;
 711
 712                                 snprintf(buf, sizeof(buf),
 713                                          "CCA=%lu TR=%s MCmd=%s STag=%lu "
 714                                          "SPort=%lu\n",
 715                                          cca_bits, tr[tr_bits], mcmd[mcmd_bits],
 716                                          stag_bits, sport_bits);
 717                         } else {
 718                                 /* glob state & sresp together */
 719                                 unsigned long c3_bits = (cm_error >> 18) & 7;
 720                                 unsigned long c2_bits = (cm_error >> 15) & 7;
 721                                 unsigned long c1_bits = (cm_error >> 12) & 7;
 722                                 unsigned long c0_bits = (cm_error >> 9) & 7;
 723                                 unsigned long sc_bit = (cm_error >> 8) & 1;
 724                                 unsigned long mcmd_bits = (cm_error >> 3) & 0x1f;
 725                                 unsigned long sport_bits = (cm_error >> 0) & 7;
 726                                 snprintf(buf, sizeof(buf),
 727                                          "C3=%s C2=%s C1=%s C0=%s SC=%s "
 728                                          "MCmd=%s SPort=%lu\n",
 729                                          core[c3_bits], core[c2_bits],
 730                                          core[c1_bits], core[c0_bits],
 731                                          sc_bit ? "True" : "False",
 732                                          mcmd[mcmd_bits], sport_bits);
 733                         }
 734
 735                         ocause = (cm_other & GCMP_GCB_GMEO_ERROR_2ND_MSK) >>
 736                                  GCMP_GCB_GMEO_ERROR_2ND_SHF;
 737
 738                         printk("CM_ERROR=%08lx %s <%s>\n", cm_error,
 739                                causes[cause], buf);
 740                         printk("CM_ADDR =%08lx\n", cm_addr);
 741                         printk("CM_OTHER=%08lx %s\n", cm_other, causes[ocause]);
 742
 743                         /* reprime cause register */
 744                         GCMPGCB(GCMEC) = 0;
 745                 }
 746         }
 747
 748         return retval;
 749 }