git.oblomov.eu Git - linux-2.6/blob - arch/mips/au1000/common/irq.c

   1 /*
   2  * BRIEF MODULE DESCRIPTION
   3  *      Au1000 interrupt routines.
   4  *
   5  * Copyright 2001 MontaVista Software Inc.
   6  * Author: MontaVista Software, Inc.
   7  *              ppopov@mvista.com or source@mvista.com
   8  *
   9  *  This program is free software; you can redistribute  it and/or modify it
  10  *  under  the terms of  the GNU General  Public License as published by the
  11  *  Free Software Foundation;  either version 2 of the  License, or (at your
  12  *  option) any later version.
  13  *
  14  *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
  15  *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
  16  *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
  17  *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
  18  *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  19  *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
  20  *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  21  *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
  22  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  23  *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  *
  25  *  You should have received a copy of the  GNU General Public License along
  26  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  27  *  675 Mass Ave, Cambridge, MA 02139, USA.
  28  */
  29 #include <linux/config.h>
  30 #include <linux/errno.h>
  31 #include <linux/init.h>
  32 #include <linux/irq.h>
  33 #include <linux/kernel_stat.h>
  34 #include <linux/module.h>
  35 #include <linux/signal.h>
  36 #include <linux/sched.h>
  37 #include <linux/types.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/ioport.h>
  40 #include <linux/timex.h>
  41 #include <linux/slab.h>
  42 #include <linux/random.h>
  43 #include <linux/delay.h>
  44 #include <linux/bitops.h>
  45
  46 #include <asm/bootinfo.h>
  47 #include <asm/io.h>
  48 #include <asm/mipsregs.h>
  49 #include <asm/system.h>
  50 #include <asm/mach-au1x00/au1000.h>
  51 #ifdef CONFIG_MIPS_PB1000
  52 #include <asm/mach-pb1x00/pb1000.h>
  53 #endif
  54
  55 #undef DEBUG_IRQ
  56 #ifdef DEBUG_IRQ
  57 /* note: prints function name for you */
  58 #define DPRINTK(fmt, args...) printk("%s: " fmt, __FUNCTION__ , ## args)
  59 #else
  60 #define DPRINTK(fmt, args...)
  61 #endif
  62
  63 #define EXT_INTC0_REQ0 2 /* IP 2 */
  64 #define EXT_INTC0_REQ1 3 /* IP 3 */
  65 #define EXT_INTC1_REQ0 4 /* IP 4 */
  66 #define EXT_INTC1_REQ1 5 /* IP 5 */
  67 #define MIPS_TIMER_IP  7 /* IP 7 */
  68
  69 extern void set_debug_traps(void);
  70 extern irq_cpustat_t irq_stat [NR_CPUS];
  71 extern void mips_timer_interrupt(struct pt_regs *regs);
  72
  73 static void setup_local_irq(unsigned int irq, int type, int int_req);
  74 static unsigned int startup_irq(unsigned int irq);
  75 static void end_irq(unsigned int irq_nr);
  76 static inline void mask_and_ack_level_irq(unsigned int irq_nr);
  77 static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr);
  78 static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr);
  79 static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr);
  80 inline void local_enable_irq(unsigned int irq_nr);
  81 inline void local_disable_irq(unsigned int irq_nr);
  82
  83 void    (*board_init_irq)(void);
  84
  85 #ifdef CONFIG_PM
  86 extern irqreturn_t counter0_irq(int irq, void *dev_id, struct pt_regs *regs);
  87 #endif
  88
  89 static DEFINE_SPINLOCK(irq_lock);
  90
  91
  92 static unsigned int startup_irq(unsigned int irq_nr)
  93 {
  94         local_enable_irq(irq_nr);
  95         return 0;
  96 }
  97
  98
  99 static void shutdown_irq(unsigned int irq_nr)
 100 {
 101         local_disable_irq(irq_nr);
 102         return;
 103 }
 104
 105
 106 inline void local_enable_irq(unsigned int irq_nr)
 107 {
 108         if (irq_nr > AU1000_LAST_INTC0_INT) {
 109                 au_writel(1<<(irq_nr-32), IC1_MASKSET);
 110                 au_writel(1<<(irq_nr-32), IC1_WAKESET);
 111         }
 112         else {
 113                 au_writel(1<<irq_nr, IC0_MASKSET);
 114                 au_writel(1<<irq_nr, IC0_WAKESET);
 115         }
 116         au_sync();
 117 }
 118
 119
 120 inline void local_disable_irq(unsigned int irq_nr)
 121 {
 122         if (irq_nr > AU1000_LAST_INTC0_INT) {
 123                 au_writel(1<<(irq_nr-32), IC1_MASKCLR);
 124                 au_writel(1<<(irq_nr-32), IC1_WAKECLR);
 125         }
 126         else {
 127                 au_writel(1<<irq_nr, IC0_MASKCLR);
 128                 au_writel(1<<irq_nr, IC0_WAKECLR);
 129         }
 130         au_sync();
 131 }
 132
 133
 134 static inline void mask_and_ack_rise_edge_irq(unsigned int irq_nr)
 135 {
 136         if (irq_nr > AU1000_LAST_INTC0_INT) {
 137                 au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
 138                 au_writel(1<<(irq_nr-32), IC1_MASKCLR);
 139         }
 140         else {
 141                 au_writel(1<<irq_nr, IC0_RISINGCLR);
 142                 au_writel(1<<irq_nr, IC0_MASKCLR);
 143         }
 144         au_sync();
 145 }
 146
 147
 148 static inline void mask_and_ack_fall_edge_irq(unsigned int irq_nr)
 149 {
 150         if (irq_nr > AU1000_LAST_INTC0_INT) {
 151                 au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
 152                 au_writel(1<<(irq_nr-32), IC1_MASKCLR);
 153         }
 154         else {
 155                 au_writel(1<<irq_nr, IC0_FALLINGCLR);
 156                 au_writel(1<<irq_nr, IC0_MASKCLR);
 157         }
 158         au_sync();
 159 }
 160
 161
 162 static inline void mask_and_ack_either_edge_irq(unsigned int irq_nr)
 163 {
 164         /* This may assume that we don't get interrupts from
 165          * both edges at once, or if we do, that we don't care.
 166          */
 167         if (irq_nr > AU1000_LAST_INTC0_INT) {
 168                 au_writel(1<<(irq_nr-32), IC1_FALLINGCLR);
 169                 au_writel(1<<(irq_nr-32), IC1_RISINGCLR);
 170                 au_writel(1<<(irq_nr-32), IC1_MASKCLR);
 171         }
 172         else {
 173                 au_writel(1<<irq_nr, IC0_FALLINGCLR);
 174                 au_writel(1<<irq_nr, IC0_RISINGCLR);
 175                 au_writel(1<<irq_nr, IC0_MASKCLR);
 176         }
 177         au_sync();
 178 }
 179
 180
 181 static inline void mask_and_ack_level_irq(unsigned int irq_nr)
 182 {
 183
 184         local_disable_irq(irq_nr);
 185         au_sync();
 186 #if defined(CONFIG_MIPS_PB1000)
 187         if (irq_nr == AU1000_GPIO_15) {
 188                 au_writel(0x8000, PB1000_MDR); /* ack int */
 189                 au_sync();
 190         }
 191 #endif
 192         return;
 193 }
 194
 195
 196 static void end_irq(unsigned int irq_nr)
 197 {
 198         if (!(irq_desc[irq_nr].status & (IRQ_DISABLED|IRQ_INPROGRESS))) {
 199                 local_enable_irq(irq_nr);
 200         }
 201 #if defined(CONFIG_MIPS_PB1000)
 202         if (irq_nr == AU1000_GPIO_15) {
 203                 au_writel(0x4000, PB1000_MDR); /* enable int */
 204                 au_sync();
 205         }
 206 #endif
 207 }
 208
 209 unsigned long save_local_and_disable(int controller)
 210 {
 211         int i;
 212         unsigned long flags, mask;
 213
 214         spin_lock_irqsave(&irq_lock, flags);
 215         if (controller) {
 216                 mask = au_readl(IC1_MASKSET);
 217                 for (i=32; i<64; i++) {
 218                         local_disable_irq(i);
 219                 }
 220         }
 221         else {
 222                 mask = au_readl(IC0_MASKSET);
 223                 for (i=0; i<32; i++) {
 224                         local_disable_irq(i);
 225                 }
 226         }
 227         spin_unlock_irqrestore(&irq_lock, flags);
 228
 229         return mask;
 230 }
 231
 232 void restore_local_and_enable(int controller, unsigned long mask)
 233 {
 234         int i;
 235         unsigned long flags, new_mask;
 236
 237         spin_lock_irqsave(&irq_lock, flags);
 238         for (i=0; i<32; i++) {
 239                 if (mask & (1<<i)) {
 240                         if (controller)
 241                                 local_enable_irq(i+32);
 242                         else
 243                                 local_enable_irq(i);
 244                 }
 245         }
 246         if (controller)
 247                 new_mask = au_readl(IC1_MASKSET);
 248         else
 249                 new_mask = au_readl(IC0_MASKSET);
 250
 251         spin_unlock_irqrestore(&irq_lock, flags);
 252 }
 253
 254
 255 static struct hw_interrupt_type rise_edge_irq_type = {
 256         .typename = "Au1000 Rise Edge",
 257         .startup = startup_irq,
 258         .shutdown = shutdown_irq,
 259         .enable = local_enable_irq,
 260         .disable = local_disable_irq,
 261         .ack = mask_and_ack_rise_edge_irq,
 262         .end = end_irq,
 263 };
 264
 265 static struct hw_interrupt_type fall_edge_irq_type = {
 266         .typename = "Au1000 Fall Edge",
 267         .startup = startup_irq,
 268         .shutdown = shutdown_irq,
 269         .enable = local_enable_irq,
 270         .disable = local_disable_irq,
 271         .ack = mask_and_ack_fall_edge_irq,
 272         .end = end_irq,
 273 };
 274
 275 static struct hw_interrupt_type either_edge_irq_type = {
 276         .typename = "Au1000 Rise or Fall Edge",
 277         .startup = startup_irq,
 278         .shutdown = shutdown_irq,
 279         .enable = local_enable_irq,
 280         .disable = local_disable_irq,
 281         .ack = mask_and_ack_either_edge_irq,
 282         .end = end_irq,
 283 };
 284
 285 static struct hw_interrupt_type level_irq_type = {
 286         .typename = "Au1000 Level",
 287         .startup = startup_irq,
 288         .shutdown = shutdown_irq,
 289         .enable = local_enable_irq,
 290         .disable = local_disable_irq,
 291         .ack = mask_and_ack_level_irq,
 292         .end = end_irq,
 293 };
 294
 295 #ifdef CONFIG_PM
 296 void startup_match20_interrupt(irqreturn_t (*handler)(int, void *, struct pt_regs *))
 297 {
 298         struct irq_desc *desc = &irq_desc[AU1000_TOY_MATCH2_INT];
 299
 300         static struct irqaction action;
 301         memset(&action, 0, sizeof(struct irqaction));
 302
 303         /* This is a big problem.... since we didn't use request_irq
 304          * when kernel/irq.c calls probe_irq_xxx this interrupt will
 305          * be probed for usage. This will end up disabling the device :(
 306          * Give it a bogus "action" pointer -- this will keep it from
 307          * getting auto-probed!
 308          *
 309          * By setting the status to match that of request_irq() we
 310          * can avoid it.  --cgray
 311         */
 312         action.dev_id = handler;
 313         action.flags = SA_INTERRUPT;
 314         cpus_clear(action.mask);
 315         action.name = "Au1xxx TOY";
 316         action.handler = handler;
 317         action.next = NULL;
 318
 319         desc->action = &action;
 320         desc->status &= ~(IRQ_DISABLED | IRQ_AUTODETECT | IRQ_WAITING | IRQ_INPROGRESS);
 321
 322         local_enable_irq(AU1000_TOY_MATCH2_INT);
 323 }
 324 #endif
 325
 326 static void setup_local_irq(unsigned int irq_nr, int type, int int_req)
 327 {
 328         if (irq_nr > AU1000_MAX_INTR) return;
 329         /* Config2[n], Config1[n], Config0[n] */
 330         if (irq_nr > AU1000_LAST_INTC0_INT) {
 331                 switch (type) {
 332                         case INTC_INT_RISE_EDGE: /* 0:0:1 */
 333                                 au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
 334                                 au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
 335                                 au_writel(1<<(irq_nr-32), IC1_CFG0SET);
 336                                 irq_desc[irq_nr].handler = &rise_edge_irq_type;
 337                                 break;
 338                         case INTC_INT_FALL_EDGE: /* 0:1:0 */
 339                                 au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
 340                                 au_writel(1<<(irq_nr-32), IC1_CFG1SET);
 341                                 au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
 342                                 irq_desc[irq_nr].handler = &fall_edge_irq_type;
 343                                 break;
 344                         case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
 345                                 au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
 346                                 au_writel(1<<(irq_nr-32), IC1_CFG1SET);
 347                                 au_writel(1<<(irq_nr-32), IC1_CFG0SET);
 348                                 irq_desc[irq_nr].handler = &either_edge_irq_type;
 349                                 break;
 350                         case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
 351                                 au_writel(1<<(irq_nr-32), IC1_CFG2SET);
 352                                 au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
 353                                 au_writel(1<<(irq_nr-32), IC1_CFG0SET);
 354                                 irq_desc[irq_nr].handler = &level_irq_type;
 355                                 break;
 356                         case INTC_INT_LOW_LEVEL: /* 1:1:0 */
 357                                 au_writel(1<<(irq_nr-32), IC1_CFG2SET);
 358                                 au_writel(1<<(irq_nr-32), IC1_CFG1SET);
 359                                 au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
 360                                 irq_desc[irq_nr].handler = &level_irq_type;
 361                                 break;
 362                         case INTC_INT_DISABLED: /* 0:0:0 */
 363                                 au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
 364                                 au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
 365                                 au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
 366                                 break;
 367                         default: /* disable the interrupt */
 368                                 printk("unexpected int type %d (irq %d)\n", type, irq_nr);
 369                                 au_writel(1<<(irq_nr-32), IC1_CFG0CLR);
 370                                 au_writel(1<<(irq_nr-32), IC1_CFG1CLR);
 371                                 au_writel(1<<(irq_nr-32), IC1_CFG2CLR);
 372                                 return;
 373                 }
 374                 if (int_req) /* assign to interrupt request 1 */
 375                         au_writel(1<<(irq_nr-32), IC1_ASSIGNCLR);
 376                 else         /* assign to interrupt request 0 */
 377                         au_writel(1<<(irq_nr-32), IC1_ASSIGNSET);
 378                 au_writel(1<<(irq_nr-32), IC1_SRCSET);
 379                 au_writel(1<<(irq_nr-32), IC1_MASKCLR);
 380                 au_writel(1<<(irq_nr-32), IC1_WAKECLR);
 381         }
 382         else {
 383                 switch (type) {
 384                         case INTC_INT_RISE_EDGE: /* 0:0:1 */
 385                                 au_writel(1<<irq_nr, IC0_CFG2CLR);
 386                                 au_writel(1<<irq_nr, IC0_CFG1CLR);
 387                                 au_writel(1<<irq_nr, IC0_CFG0SET);
 388                                 irq_desc[irq_nr].handler = &rise_edge_irq_type;
 389                                 break;
 390                         case INTC_INT_FALL_EDGE: /* 0:1:0 */
 391                                 au_writel(1<<irq_nr, IC0_CFG2CLR);
 392                                 au_writel(1<<irq_nr, IC0_CFG1SET);
 393                                 au_writel(1<<irq_nr, IC0_CFG0CLR);
 394                                 irq_desc[irq_nr].handler = &fall_edge_irq_type;
 395                                 break;
 396                         case INTC_INT_RISE_AND_FALL_EDGE: /* 0:1:1 */
 397                                 au_writel(1<<irq_nr, IC0_CFG2CLR);
 398                                 au_writel(1<<irq_nr, IC0_CFG1SET);
 399                                 au_writel(1<<irq_nr, IC0_CFG0SET);
 400                                 irq_desc[irq_nr].handler = &either_edge_irq_type;
 401                                 break;
 402                         case INTC_INT_HIGH_LEVEL: /* 1:0:1 */
 403                                 au_writel(1<<irq_nr, IC0_CFG2SET);
 404                                 au_writel(1<<irq_nr, IC0_CFG1CLR);
 405                                 au_writel(1<<irq_nr, IC0_CFG0SET);
 406                                 irq_desc[irq_nr].handler = &level_irq_type;
 407                                 break;
 408                         case INTC_INT_LOW_LEVEL: /* 1:1:0 */
 409                                 au_writel(1<<irq_nr, IC0_CFG2SET);
 410                                 au_writel(1<<irq_nr, IC0_CFG1SET);
 411                                 au_writel(1<<irq_nr, IC0_CFG0CLR);
 412                                 irq_desc[irq_nr].handler = &level_irq_type;
 413                                 break;
 414                         case INTC_INT_DISABLED: /* 0:0:0 */
 415                                 au_writel(1<<irq_nr, IC0_CFG0CLR);
 416                                 au_writel(1<<irq_nr, IC0_CFG1CLR);
 417                                 au_writel(1<<irq_nr, IC0_CFG2CLR);
 418                                 break;
 419                         default: /* disable the interrupt */
 420                                 printk("unexpected int type %d (irq %d)\n", type, irq_nr);
 421                                 au_writel(1<<irq_nr, IC0_CFG0CLR);
 422                                 au_writel(1<<irq_nr, IC0_CFG1CLR);
 423                                 au_writel(1<<irq_nr, IC0_CFG2CLR);
 424                                 return;
 425                 }
 426                 if (int_req) /* assign to interrupt request 1 */
 427                         au_writel(1<<irq_nr, IC0_ASSIGNCLR);
 428                 else         /* assign to interrupt request 0 */
 429                         au_writel(1<<irq_nr, IC0_ASSIGNSET);
 430                 au_writel(1<<irq_nr, IC0_SRCSET);
 431                 au_writel(1<<irq_nr, IC0_MASKCLR);
 432                 au_writel(1<<irq_nr, IC0_WAKECLR);
 433         }
 434         au_sync();
 435 }
 436
 437
 438 void __init arch_init_irq(void)
 439 {
 440         int i;
 441         unsigned long cp0_status;
 442         au1xxx_irq_map_t *imp;
 443         extern au1xxx_irq_map_t au1xxx_irq_map[];
 444         extern au1xxx_irq_map_t au1xxx_ic0_map[];
 445         extern int au1xxx_nr_irqs;
 446         extern int au1xxx_ic0_nr_irqs;
 447
 448         cp0_status = read_c0_status();
 449
 450         /* Initialize interrupt controllers to a safe state.
 451         */
 452         au_writel(0xffffffff, IC0_CFG0CLR);
 453         au_writel(0xffffffff, IC0_CFG1CLR);
 454         au_writel(0xffffffff, IC0_CFG2CLR);
 455         au_writel(0xffffffff, IC0_MASKCLR);
 456         au_writel(0xffffffff, IC0_ASSIGNSET);
 457         au_writel(0xffffffff, IC0_WAKECLR);
 458         au_writel(0xffffffff, IC0_SRCSET);
 459         au_writel(0xffffffff, IC0_FALLINGCLR);
 460         au_writel(0xffffffff, IC0_RISINGCLR);
 461         au_writel(0x00000000, IC0_TESTBIT);
 462
 463         au_writel(0xffffffff, IC1_CFG0CLR);
 464         au_writel(0xffffffff, IC1_CFG1CLR);
 465         au_writel(0xffffffff, IC1_CFG2CLR);
 466         au_writel(0xffffffff, IC1_MASKCLR);
 467         au_writel(0xffffffff, IC1_ASSIGNSET);
 468         au_writel(0xffffffff, IC1_WAKECLR);
 469         au_writel(0xffffffff, IC1_SRCSET);
 470         au_writel(0xffffffff, IC1_FALLINGCLR);
 471         au_writel(0xffffffff, IC1_RISINGCLR);
 472         au_writel(0x00000000, IC1_TESTBIT);
 473
 474         /* Initialize IC0, which is fixed per processor.
 475         */
 476         imp = au1xxx_ic0_map;
 477         for (i=0; i<au1xxx_ic0_nr_irqs; i++) {
 478                 setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
 479                 imp++;
 480         }
 481
 482         /* Now set up the irq mapping for the board.
 483         */
 484         imp = au1xxx_irq_map;
 485         for (i=0; i<au1xxx_nr_irqs; i++) {
 486                 setup_local_irq(imp->im_irq, imp->im_type, imp->im_request);
 487                 imp++;
 488         }
 489
 490         set_c0_status(ALLINTS);
 491
 492         /* Board specific IRQ initialization.
 493         */
 494         if (board_init_irq)
 495                 (*board_init_irq)();
 496 }
 497
 498
 499 /*
 500  * Interrupts are nested. Even if an interrupt handler is registered
 501  * as "fast", we might get another interrupt before we return from
 502  * intcX_reqX_irqdispatch().
 503  */
 504
 505 void intc0_req0_irqdispatch(struct pt_regs *regs)
 506 {
 507         int irq = 0;
 508         static unsigned long intc0_req0 = 0;
 509
 510         intc0_req0 |= au_readl(IC0_REQ0INT);
 511
 512         if (!intc0_req0) return;
 513 #ifdef AU1000_USB_DEV_REQ_INT
 514         /*
 515          * Because of the tight timing of SETUP token to reply
 516          * transactions, the USB devices-side packet complete
 517          * interrupt needs the highest priority.
 518          */
 519         if ((intc0_req0 & (1<<AU1000_USB_DEV_REQ_INT))) {
 520                 intc0_req0 &= ~(1<<AU1000_USB_DEV_REQ_INT);
 521                 do_IRQ(AU1000_USB_DEV_REQ_INT, regs);
 522                 return;
 523         }
 524 #endif
 525         irq = au_ffs(intc0_req0) - 1;
 526         intc0_req0 &= ~(1<<irq);
 527         do_IRQ(irq, regs);
 528 }
 529
 530
 531 void intc0_req1_irqdispatch(struct pt_regs *regs)
 532 {
 533         int irq = 0;
 534         static unsigned long intc0_req1 = 0;
 535
 536         intc0_req1 |= au_readl(IC0_REQ1INT);
 537
 538         if (!intc0_req1) return;
 539
 540         irq = au_ffs(intc0_req1) - 1;
 541         intc0_req1 &= ~(1<<irq);
 542         do_IRQ(irq, regs);
 543 }
 544
 545
 546 /*
 547  * Interrupt Controller 1:
 548  * interrupts 32 - 63
 549  */
 550 void intc1_req0_irqdispatch(struct pt_regs *regs)
 551 {
 552         int irq = 0;
 553         static unsigned long intc1_req0 = 0;
 554
 555         intc1_req0 |= au_readl(IC1_REQ0INT);
 556
 557         if (!intc1_req0) return;
 558
 559         irq = au_ffs(intc1_req0) - 1;
 560         intc1_req0 &= ~(1<<irq);
 561         irq += 32;
 562         do_IRQ(irq, regs);
 563 }
 564
 565
 566 void intc1_req1_irqdispatch(struct pt_regs *regs)
 567 {
 568         int irq = 0;
 569         static unsigned long intc1_req1 = 0;
 570
 571         intc1_req1 |= au_readl(IC1_REQ1INT);
 572
 573         if (!intc1_req1) return;
 574
 575         irq = au_ffs(intc1_req1) - 1;
 576         intc1_req1 &= ~(1<<irq);
 577         irq += 32;
 578         do_IRQ(irq, regs);
 579 }
 580
 581 #ifdef CONFIG_PM
 582
 583 /* Save/restore the interrupt controller state.
 584  * Called from the save/restore core registers as part of the
 585  * au_sleep function in power.c.....maybe I should just pm_register()
 586  * them instead?
 587  */
 588 static uint     sleep_intctl_config0[2];
 589 static uint     sleep_intctl_config1[2];
 590 static uint     sleep_intctl_config2[2];
 591 static uint     sleep_intctl_src[2];
 592 static uint     sleep_intctl_assign[2];
 593 static uint     sleep_intctl_wake[2];
 594 static uint     sleep_intctl_mask[2];
 595
 596 void
 597 save_au1xxx_intctl(void)
 598 {
 599         sleep_intctl_config0[0] = au_readl(IC0_CFG0RD);
 600         sleep_intctl_config1[0] = au_readl(IC0_CFG1RD);
 601         sleep_intctl_config2[0] = au_readl(IC0_CFG2RD);
 602         sleep_intctl_src[0] = au_readl(IC0_SRCRD);
 603         sleep_intctl_assign[0] = au_readl(IC0_ASSIGNRD);
 604         sleep_intctl_wake[0] = au_readl(IC0_WAKERD);
 605         sleep_intctl_mask[0] = au_readl(IC0_MASKRD);
 606
 607         sleep_intctl_config0[1] = au_readl(IC1_CFG0RD);
 608         sleep_intctl_config1[1] = au_readl(IC1_CFG1RD);
 609         sleep_intctl_config2[1] = au_readl(IC1_CFG2RD);
 610         sleep_intctl_src[1] = au_readl(IC1_SRCRD);
 611         sleep_intctl_assign[1] = au_readl(IC1_ASSIGNRD);
 612         sleep_intctl_wake[1] = au_readl(IC1_WAKERD);
 613         sleep_intctl_mask[1] = au_readl(IC1_MASKRD);
 614 }
 615
 616 /* For most restore operations, we clear the entire register and
 617  * then set the bits we found during the save.
 618  */
 619 void
 620 restore_au1xxx_intctl(void)
 621 {
 622         au_writel(0xffffffff, IC0_MASKCLR); au_sync();
 623
 624         au_writel(0xffffffff, IC0_CFG0CLR); au_sync();
 625         au_writel(sleep_intctl_config0[0], IC0_CFG0SET); au_sync();
 626         au_writel(0xffffffff, IC0_CFG1CLR); au_sync();
 627         au_writel(sleep_intctl_config1[0], IC0_CFG1SET); au_sync();
 628         au_writel(0xffffffff, IC0_CFG2CLR); au_sync();
 629         au_writel(sleep_intctl_config2[0], IC0_CFG2SET); au_sync();
 630         au_writel(0xffffffff, IC0_SRCCLR); au_sync();
 631         au_writel(sleep_intctl_src[0], IC0_SRCSET); au_sync();
 632         au_writel(0xffffffff, IC0_ASSIGNCLR); au_sync();
 633         au_writel(sleep_intctl_assign[0], IC0_ASSIGNSET); au_sync();
 634         au_writel(0xffffffff, IC0_WAKECLR); au_sync();
 635         au_writel(sleep_intctl_wake[0], IC0_WAKESET); au_sync();
 636         au_writel(0xffffffff, IC0_RISINGCLR); au_sync();
 637         au_writel(0xffffffff, IC0_FALLINGCLR); au_sync();
 638         au_writel(0x00000000, IC0_TESTBIT); au_sync();
 639
 640         au_writel(0xffffffff, IC1_MASKCLR); au_sync();
 641
 642         au_writel(0xffffffff, IC1_CFG0CLR); au_sync();
 643         au_writel(sleep_intctl_config0[1], IC1_CFG0SET); au_sync();
 644         au_writel(0xffffffff, IC1_CFG1CLR); au_sync();
 645         au_writel(sleep_intctl_config1[1], IC1_CFG1SET); au_sync();
 646         au_writel(0xffffffff, IC1_CFG2CLR); au_sync();
 647         au_writel(sleep_intctl_config2[1], IC1_CFG2SET); au_sync();
 648         au_writel(0xffffffff, IC1_SRCCLR); au_sync();
 649         au_writel(sleep_intctl_src[1], IC1_SRCSET); au_sync();
 650         au_writel(0xffffffff, IC1_ASSIGNCLR); au_sync();
 651         au_writel(sleep_intctl_assign[1], IC1_ASSIGNSET); au_sync();
 652         au_writel(0xffffffff, IC1_WAKECLR); au_sync();
 653         au_writel(sleep_intctl_wake[1], IC1_WAKESET); au_sync();
 654         au_writel(0xffffffff, IC1_RISINGCLR); au_sync();
 655         au_writel(0xffffffff, IC1_FALLINGCLR); au_sync();
 656         au_writel(0x00000000, IC1_TESTBIT); au_sync();
 657
 658         au_writel(sleep_intctl_mask[1], IC1_MASKSET); au_sync();
 659
 660         au_writel(sleep_intctl_mask[0], IC0_MASKSET); au_sync();
 661 }
 662 #endif /* CONFIG_PM */
 663
 664 asmlinkage void plat_irq_dispatch(struct pt_regs *regs)
 665 {
 666         unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
 667
 668         if (pending & CAUSEF_IP7)
 669                 mips_timer_interrupt(regs);
 670         else if (pending & CAUSEF_IP2)
 671                 intc0_req0_irqdispatch(regs);
 672         else if (pending & CAUSEF_IP3)
 673                 intc0_req1_irqdispatch(regs);
 674         else if (pending & CAUSEF_IP4)
 675                 intc1_req0_irqdispatch(regs);
 676         else if (pending  & CAUSEF_IP5)
 677                 intc1_req1_irqdispatch(regs);
 678         else
 679                 spurious_interrupt(regs);
 680 }