osfmk/ppc/machine_routines.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 #include <ppc/machine_routines.h>
  23 #include <ppc/machine_cpu.h>
  24 #include <ppc/exception.h>
  25 #include <ppc/misc_protos.h>
  26 #include <ppc/Firmware.h>
  27 #include <vm/vm_page.h>
  28 #include <ppc/pmap.h>
  29 #include <ppc/proc_reg.h>
  30 #include <kern/processor.h>
  31
  32 unsigned int max_cpus_initialized = 0;
  33 unsigned int LockTimeOut = 12500000;
  34 unsigned int MutexSpin = 0;
  35 extern int forcenap;
  36
  37 #define MAX_CPUS_SET    0x1
  38 #define MAX_CPUS_WAIT   0x2
  39
  40 boolean_t get_interrupts_enabled(void);
  41
  42 /* Map memory map IO space */
  43 vm_offset_t
  44 ml_io_map(
  45         vm_offset_t phys_addr,
  46         vm_size_t size)
  47 {
  48         return(io_map(phys_addr,size));
  49 }
  50
  51 /* static memory allocation */
  52 vm_offset_t
  53 ml_static_malloc(
  54         vm_size_t size)
  55 {
  56         extern vm_offset_t static_memory_end;
  57         extern boolean_t pmap_initialized;
  58         vm_offset_t vaddr;
  59
  60         if (pmap_initialized)
  61                 return((vm_offset_t)NULL);
  62         else {
  63                 vaddr = static_memory_end;
  64                 static_memory_end = round_page_32(vaddr+size);
  65                 return(vaddr);
  66         }
  67 }
  68
  69 vm_offset_t
  70 ml_static_ptovirt(
  71         vm_offset_t paddr)
  72 {
  73         extern vm_offset_t static_memory_end;
  74         vm_offset_t vaddr;
  75
  76         /* Static memory is map V=R */
  77         vaddr = paddr;
  78         if ( (vaddr < static_memory_end) && (pmap_extract(kernel_pmap, vaddr)==paddr) )
  79                 return(vaddr);
  80         else
  81                 return((vm_offset_t)NULL);
  82 }
  83
  84 void
  85 ml_static_mfree(
  86         vm_offset_t vaddr,
  87         vm_size_t size)
  88 {
  89         vm_offset_t paddr_cur, vaddr_cur;
  90
  91         for (vaddr_cur = round_page_32(vaddr);
  92              vaddr_cur < trunc_page_32(vaddr+size);
  93              vaddr_cur += PAGE_SIZE) {
  94                 paddr_cur = pmap_extract(kernel_pmap, vaddr_cur);
  95                 if (paddr_cur != (vm_offset_t)NULL) {
  96                         vm_page_wire_count--;
  97                         pmap_remove(kernel_pmap, (addr64_t)vaddr_cur, (addr64_t)(vaddr_cur+PAGE_SIZE));
  98                         vm_page_create(paddr_cur>>12,(paddr_cur+PAGE_SIZE)>>12);
  99                 }
 100         }
 101 }
 102
 103 /* virtual to physical on wired pages */
 104 vm_offset_t ml_vtophys(
 105         vm_offset_t vaddr)
 106 {
 107         return(pmap_extract(kernel_pmap, vaddr));
 108 }
 109
 110 /* Initialize Interrupt Handler */
 111 void ml_install_interrupt_handler(
 112         void *nub,
 113         int source,
 114         void *target,
 115         IOInterruptHandler handler,
 116         void *refCon)
 117 {
 118         int     current_cpu;
 119         boolean_t current_state;
 120
 121         current_cpu = cpu_number();
 122         current_state = ml_get_interrupts_enabled();
 123
 124         per_proc_info[current_cpu].interrupt_nub     = nub;
 125         per_proc_info[current_cpu].interrupt_source  = source;
 126         per_proc_info[current_cpu].interrupt_target  = target;
 127         per_proc_info[current_cpu].interrupt_handler = handler;
 128         per_proc_info[current_cpu].interrupt_refCon  = refCon;
 129
 130         per_proc_info[current_cpu].interrupts_enabled = TRUE;
 131         (void) ml_set_interrupts_enabled(current_state);
 132
 133         initialize_screen(0, kPEAcquireScreen);
 134 }
 135
 136 /* Initialize Interrupts */
 137 void ml_init_interrupt(void)
 138 {
 139         int     current_cpu;
 140         boolean_t current_state;
 141
 142         current_state = ml_get_interrupts_enabled();
 143
 144         current_cpu = cpu_number();
 145         per_proc_info[current_cpu].interrupts_enabled = TRUE;
 146         (void) ml_set_interrupts_enabled(current_state);
 147 }
 148
 149 /* Get Interrupts Enabled */
 150 boolean_t ml_get_interrupts_enabled(void)
 151 {
 152         return((mfmsr() & MASK(MSR_EE)) != 0);
 153 }
 154
 155 /* Check if running at interrupt context */
 156 boolean_t ml_at_interrupt_context(void)
 157 {
 158         boolean_t       ret;
 159         boolean_t       current_state;
 160
 161         current_state = ml_set_interrupts_enabled(FALSE);
 162         ret = (per_proc_info[cpu_number()].istackptr == 0);
 163         ml_set_interrupts_enabled(current_state);
 164         return(ret);
 165 }
 166
 167 /* Generate a fake interrupt */
 168 void ml_cause_interrupt(void)
 169 {
 170         CreateFakeIO();
 171 }
 172
 173 void ml_thread_policy(
 174         thread_t thread,
 175         unsigned policy_id,
 176         unsigned policy_info)
 177 {
 178         extern int srv;
 179
 180         if ((policy_id == MACHINE_GROUP) &&
 181                 ((per_proc_info[0].pf.Available) & pfSMPcap))
 182                         thread_bind(thread, master_processor);
 183
 184         if (policy_info & MACHINE_NETWORK_WORKLOOP) {
 185                 spl_t           s = splsched();
 186
 187                 thread_lock(thread);
 188
 189                 if (srv == 0)
 190                         thread->sched_mode |= TH_MODE_FORCEDPREEMPT;
 191                 set_priority(thread, thread->priority + 1);
 192
 193                 thread_unlock(thread);
 194                 splx(s);
 195         }
 196 }
 197
 198 void machine_idle(void)
 199 {
 200         if (per_proc_info[cpu_number()].interrupts_enabled == TRUE) {
 201                 int cur_decr;
 202
 203                 machine_idle_ppc();
 204
 205                 /*
 206                  * protect against a lost decrementer trap
 207                  * if the current decrementer value is negative
 208                  * by more than 10 ticks, re-arm it since it's
 209                  * unlikely to fire at this point... a hardware
 210                  * interrupt got us out of machine_idle and may
 211                  * also be contributing to this state
 212                  */
 213                 cur_decr = isync_mfdec();
 214
 215                 if (cur_decr < -10) {
 216                         mtdec(1);
 217                 }
 218         }
 219 }
 220
 221 void
 222 machine_signal_idle(
 223         processor_t processor)
 224 {
 225         if (per_proc_info[processor->slot_num].pf.Available & (pfCanDoze|pfWillNap))
 226                 (void)cpu_signal(processor->slot_num, SIGPwake, 0, 0);
 227 }
 228
 229 kern_return_t
 230 ml_processor_register(
 231         ml_processor_info_t *processor_info,
 232         processor_t         *processor,
 233         ipi_handler_t       *ipi_handler)
 234 {
 235         kern_return_t ret;
 236         int target_cpu, cpu;
 237         int donap;
 238
 239         if (processor_info->boot_cpu == FALSE) {
 240                  if (cpu_register(&target_cpu) != KERN_SUCCESS)
 241                         return KERN_FAILURE;
 242         } else {
 243                 /* boot_cpu is always 0 */
 244                 target_cpu = 0;
 245         }
 246
 247         per_proc_info[target_cpu].cpu_id = processor_info->cpu_id;
 248         per_proc_info[target_cpu].start_paddr = processor_info->start_paddr;
 249
 250         donap = processor_info->supports_nap;           /* Assume we use requested nap */
 251         if(forcenap) donap = forcenap - 1;                      /* If there was an override, use that */
 252
 253         if(per_proc_info[target_cpu].pf.Available & pfCanNap)
 254           if(donap)
 255                 per_proc_info[target_cpu].pf.Available |= pfWillNap;
 256
 257         if(processor_info->time_base_enable !=  (void(*)(cpu_id_t, boolean_t ))NULL)
 258                 per_proc_info[target_cpu].time_base_enable = processor_info->time_base_enable;
 259         else
 260                 per_proc_info[target_cpu].time_base_enable = (void(*)(cpu_id_t, boolean_t ))NULL;
 261
 262         if(target_cpu == cpu_number())
 263                 __asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));       /* Set live value */
 264
 265         *processor = cpu_to_processor(target_cpu);
 266         *ipi_handler = cpu_signal_handler;
 267
 268         return KERN_SUCCESS;
 269 }
 270
 271 boolean_t
 272 ml_enable_nap(int target_cpu, boolean_t nap_enabled)
 273 {
 274     boolean_t prev_value = (per_proc_info[target_cpu].pf.Available & pfCanNap) && (per_proc_info[target_cpu].pf.Available & pfWillNap);
 275
 276         if(forcenap) nap_enabled = forcenap - 1;                /* If we are to force nap on or off, do it */
 277
 278         if(per_proc_info[target_cpu].pf.Available & pfCanNap) {                         /* Can the processor nap? */
 279                 if (nap_enabled) per_proc_info[target_cpu].pf.Available |= pfWillNap;   /* Is nap supported on this machine? */
 280                 else per_proc_info[target_cpu].pf.Available &= ~pfWillNap;              /* Clear if not */
 281         }
 282
 283         if(target_cpu == cpu_number())
 284                 __asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));       /* Set live value */
 285
 286     return (prev_value);
 287 }
 288
 289 void
 290 ml_init_max_cpus(unsigned long max_cpus)
 291 {
 292         boolean_t current_state;
 293
 294         current_state = ml_set_interrupts_enabled(FALSE);
 295         if (max_cpus_initialized != MAX_CPUS_SET) {
 296                 if (max_cpus > 0 && max_cpus < NCPUS)
 297                         machine_info.max_cpus = max_cpus;
 298                 if (max_cpus_initialized == MAX_CPUS_WAIT)
 299                         wakeup((event_t)&max_cpus_initialized);
 300                 max_cpus_initialized = MAX_CPUS_SET;
 301         }
 302         (void) ml_set_interrupts_enabled(current_state);
 303 }
 304
 305 int
 306 ml_get_max_cpus(void)
 307 {
 308         boolean_t current_state;
 309
 310         current_state = ml_set_interrupts_enabled(FALSE);
 311         if (max_cpus_initialized != MAX_CPUS_SET) {
 312                 max_cpus_initialized = MAX_CPUS_WAIT;
 313                 assert_wait((event_t)&max_cpus_initialized, THREAD_UNINT);
 314                 (void)thread_block(THREAD_CONTINUE_NULL);
 315         }
 316         (void) ml_set_interrupts_enabled(current_state);
 317         return(machine_info.max_cpus);
 318 }
 319
 320 void
 321 ml_cpu_get_info(ml_cpu_info_t *cpu_info)
 322 {
 323   if (cpu_info == 0) return;
 324
 325   cpu_info->vector_unit = (per_proc_info[0].pf.Available & pfAltivec) != 0;
 326   cpu_info->cache_line_size = per_proc_info[0].pf.lineSize;
 327   cpu_info->l1_icache_size = per_proc_info[0].pf.l1iSize;
 328   cpu_info->l1_dcache_size = per_proc_info[0].pf.l1dSize;
 329
 330   if (per_proc_info[0].pf.Available & pfL2) {
 331     cpu_info->l2_settings = per_proc_info[0].pf.l2cr;
 332     cpu_info->l2_cache_size = per_proc_info[0].pf.l2Size;
 333   } else {
 334     cpu_info->l2_settings = 0;
 335     cpu_info->l2_cache_size = 0xFFFFFFFF;
 336   }
 337   if (per_proc_info[0].pf.Available & pfL3) {
 338     cpu_info->l3_settings = per_proc_info[0].pf.l3cr;
 339     cpu_info->l3_cache_size = per_proc_info[0].pf.l3Size;
 340   } else {
 341     cpu_info->l3_settings = 0;
 342     cpu_info->l3_cache_size = 0xFFFFFFFF;
 343   }
 344 }
 345
 346 #define l2em 0x80000000
 347 #define l3em 0x80000000
 348
 349 extern int real_ncpus;
 350
 351 int
 352 ml_enable_cache_level(int cache_level, int enable)
 353 {
 354   int old_mode;
 355   unsigned long available, ccr;
 356
 357   if (real_ncpus != 1) return -1;
 358
 359   available = per_proc_info[0].pf.Available;
 360
 361   if ((cache_level == 2) && (available & pfL2)) {
 362     ccr = per_proc_info[0].pf.l2cr;
 363     old_mode = (ccr & l2em) ? TRUE : FALSE;
 364     if (old_mode != enable) {
 365       if (enable) ccr = per_proc_info[0].pf.l2crOriginal;
 366       else ccr = 0;
 367       per_proc_info[0].pf.l2cr = ccr;
 368       cacheInit();
 369     }
 370
 371     return old_mode;
 372   }
 373
 374   if ((cache_level == 3) && (available & pfL3)) {
 375     ccr = per_proc_info[0].pf.l3cr;
 376     old_mode = (ccr & l3em) ? TRUE : FALSE;
 377     if (old_mode != enable) {
 378       if (enable) ccr = per_proc_info[0].pf.l3crOriginal;
 379       else ccr = 0;
 380       per_proc_info[0].pf.l3cr = ccr;
 381       cacheInit();
 382     }
 383
 384     return old_mode;
 385   }
 386
 387   return -1;
 388 }
 389
 390 void
 391 ml_init_lock_timeout(void)
 392 {
 393         uint64_t        abstime;
 394         uint32_t        mtxspin;
 395
 396         nanoseconds_to_absolutetime(NSEC_PER_SEC>>2, &abstime);
 397         LockTimeOut = (unsigned int)abstime;
 398
 399         if (PE_parse_boot_arg("mtxspin", &mtxspin)) {
 400                 if (mtxspin > USEC_PER_SEC>>4)
 401                         mtxspin =  USEC_PER_SEC>>4;
 402                 nanoseconds_to_absolutetime(mtxspin*NSEC_PER_USEC, &abstime);
 403         } else {
 404                 nanoseconds_to_absolutetime(20*NSEC_PER_USEC, &abstime);
 405         }
 406         MutexSpin = (unsigned int)abstime;
 407 }
 408
 409 void
 410 init_ast_check(processor_t processor)
 411 {}
 412
 413 void
 414 cause_ast_check(
 415         processor_t             processor)
 416 {
 417         if (    processor != current_processor()                                                                &&
 418                 per_proc_info[processor->slot_num].interrupts_enabled == TRUE   )
 419                 cpu_signal(processor->slot_num, SIGPast, NULL, NULL);
 420 }
 421
 422 thread_t
 423 switch_to_shutdown_context(
 424         thread_t        thread,
 425         void            (*doshutdown)(processor_t),
 426         processor_t     processor)
 427 {
 428         CreateShutdownCTX();
 429         return((thread_t)(per_proc_info[cpu_number()].old_thread));
 430 }
 431
 432 int
 433 set_be_bit()
 434 {
 435
 436         int mycpu;
 437         boolean_t current_state;
 438
 439         current_state = ml_set_interrupts_enabled(FALSE);       /* Can't allow interruptions when mucking with per_proc flags */
 440         mycpu = cpu_number();
 441         per_proc_info[mycpu].cpu_flags |= traceBE;
 442         (void) ml_set_interrupts_enabled(current_state);
 443         return(1);
 444 }
 445
 446 int
 447 clr_be_bit()
 448 {
 449         int mycpu;
 450         boolean_t current_state;
 451
 452         current_state = ml_set_interrupts_enabled(FALSE);       /* Can't allow interruptions when mucking with per_proc flags */
 453         mycpu = cpu_number();
 454         per_proc_info[mycpu].cpu_flags &= ~traceBE;
 455         (void) ml_set_interrupts_enabled(current_state);
 456         return(1);
 457 }
 458
 459 int
 460 be_tracing()
 461 {
 462   int mycpu = cpu_number();
 463   return(per_proc_info[mycpu].cpu_flags & traceBE);
 464 }
 465