osfmk/ppc/machine_routines.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 #include <ppc/machine_routines.h>
  26 #include <ppc/machine_cpu.h>
  27 #include <ppc/exception.h>
  28 #include <ppc/misc_protos.h>
  29 #include <ppc/Firmware.h>
  30 #include <vm/vm_page.h>
  31 #include <ppc/pmap.h>
  32 #include <ppc/proc_reg.h>
  33 #include <kern/processor.h>
  34
  35 unsigned int max_cpus_initialized = 0;
  36 extern int forcenap;
  37
  38 #define MAX_CPUS_SET    0x1
  39 #define MAX_CPUS_WAIT   0x2
  40
  41 boolean_t get_interrupts_enabled(void);
  42
  43 /* Map memory map IO space */
  44 vm_offset_t
  45 ml_io_map(
  46         vm_offset_t phys_addr,
  47         vm_size_t size)
  48 {
  49         return(io_map(phys_addr,size));
  50 }
  51
  52 /* static memory allocation */
  53 vm_offset_t
  54 ml_static_malloc(
  55         vm_size_t size)
  56 {
  57         extern vm_offset_t static_memory_end;
  58         extern boolean_t pmap_initialized;
  59         vm_offset_t vaddr;
  60
  61         if (pmap_initialized)
  62                 return((vm_offset_t)NULL);
  63         else {
  64                 vaddr = static_memory_end;
  65                 static_memory_end = round_page_32(vaddr+size);
  66                 return(vaddr);
  67         }
  68 }
  69
  70 vm_offset_t
  71 ml_static_ptovirt(
  72         vm_offset_t paddr)
  73 {
  74         extern vm_offset_t static_memory_end;
  75         vm_offset_t vaddr;
  76
  77         /* Static memory is map V=R */
  78         vaddr = paddr;
  79         if ( (vaddr < static_memory_end) && (pmap_extract(kernel_pmap, vaddr)==paddr) )
  80                 return(vaddr);
  81         else
  82                 return((vm_offset_t)NULL);
  83 }
  84
  85 void
  86 ml_static_mfree(
  87         vm_offset_t vaddr,
  88         vm_size_t size)
  89 {
  90         vm_offset_t paddr_cur, vaddr_cur;
  91
  92         for (vaddr_cur = round_page_32(vaddr);
  93              vaddr_cur < trunc_page_32(vaddr+size);
  94              vaddr_cur += PAGE_SIZE) {
  95                 paddr_cur = pmap_extract(kernel_pmap, vaddr_cur);
  96                 if (paddr_cur != (vm_offset_t)NULL) {
  97                         vm_page_wire_count--;
  98                         pmap_remove(kernel_pmap, (addr64_t)vaddr_cur, (addr64_t)(vaddr_cur+PAGE_SIZE));
  99                         vm_page_create(paddr_cur>>12,(paddr_cur+PAGE_SIZE)>>12);
 100                 }
 101         }
 102 }
 103
 104 /* virtual to physical on wired pages */
 105 vm_offset_t ml_vtophys(
 106         vm_offset_t vaddr)
 107 {
 108         return(pmap_extract(kernel_pmap, vaddr));
 109 }
 110
 111 /* Initialize Interrupt Handler */
 112 void ml_install_interrupt_handler(
 113         void *nub,
 114         int source,
 115         void *target,
 116         IOInterruptHandler handler,
 117         void *refCon)
 118 {
 119         int     current_cpu;
 120         boolean_t current_state;
 121
 122         current_cpu = cpu_number();
 123         current_state = ml_get_interrupts_enabled();
 124
 125         per_proc_info[current_cpu].interrupt_nub     = nub;
 126         per_proc_info[current_cpu].interrupt_source  = source;
 127         per_proc_info[current_cpu].interrupt_target  = target;
 128         per_proc_info[current_cpu].interrupt_handler = handler;
 129         per_proc_info[current_cpu].interrupt_refCon  = refCon;
 130
 131         per_proc_info[current_cpu].interrupts_enabled = TRUE;
 132         (void) ml_set_interrupts_enabled(current_state);
 133
 134         initialize_screen(0, kPEAcquireScreen);
 135 }
 136
 137 /* Initialize Interrupts */
 138 void ml_init_interrupt(void)
 139 {
 140         int     current_cpu;
 141         boolean_t current_state;
 142
 143         current_state = ml_get_interrupts_enabled();
 144
 145         current_cpu = cpu_number();
 146         per_proc_info[current_cpu].interrupts_enabled = TRUE;
 147         (void) ml_set_interrupts_enabled(current_state);
 148 }
 149
 150 /* Get Interrupts Enabled */
 151 boolean_t ml_get_interrupts_enabled(void)
 152 {
 153         return((mfmsr() & MASK(MSR_EE)) != 0);
 154 }
 155
 156 /* Check if running at interrupt context */
 157 boolean_t ml_at_interrupt_context(void)
 158 {
 159         boolean_t       ret;
 160         boolean_t       current_state;
 161
 162         current_state = ml_set_interrupts_enabled(FALSE);
 163         ret = (per_proc_info[cpu_number()].istackptr == 0);
 164         ml_set_interrupts_enabled(current_state);
 165         return(ret);
 166 }
 167
 168 /* Generate a fake interrupt */
 169 void ml_cause_interrupt(void)
 170 {
 171         CreateFakeIO();
 172 }
 173
 174 void ml_thread_policy(
 175         thread_t thread,
 176         unsigned policy_id,
 177         unsigned policy_info)
 178 {
 179         if ((policy_id == MACHINE_GROUP) &&
 180                 ((per_proc_info[0].pf.Available) & pfSMPcap))
 181                         thread_bind(thread, master_processor);
 182
 183         if (policy_info & MACHINE_NETWORK_WORKLOOP) {
 184                 spl_t           s = splsched();
 185
 186                 thread_lock(thread);
 187
 188                 thread->sched_mode |= TH_MODE_FORCEDPREEMPT;
 189                 set_priority(thread, thread->priority + 1);
 190
 191                 thread_unlock(thread);
 192                 splx(s);
 193         }
 194 }
 195
 196 void machine_idle(void)
 197 {
 198         if (per_proc_info[cpu_number()].interrupts_enabled == TRUE) {
 199                 int cur_decr;
 200
 201                 machine_idle_ppc();
 202
 203                 /*
 204                  * protect against a lost decrementer trap
 205                  * if the current decrementer value is negative
 206                  * by more than 10 ticks, re-arm it since it's
 207                  * unlikely to fire at this point... a hardware
 208                  * interrupt got us out of machine_idle and may
 209                  * also be contributing to this state
 210                  */
 211                 cur_decr = isync_mfdec();
 212
 213                 if (cur_decr < -10) {
 214                         mtdec(1);
 215                 }
 216         }
 217 }
 218
 219 void
 220 machine_signal_idle(
 221         processor_t processor)
 222 {
 223         (void)cpu_signal(processor->slot_num, SIGPwake, 0, 0);
 224 }
 225
 226 kern_return_t
 227 ml_processor_register(
 228         ml_processor_info_t *processor_info,
 229         processor_t         *processor,
 230         ipi_handler_t       *ipi_handler)
 231 {
 232         kern_return_t ret;
 233         int target_cpu, cpu;
 234         int donap;
 235
 236         if (processor_info->boot_cpu == FALSE) {
 237                  if (cpu_register(&target_cpu) != KERN_SUCCESS)
 238                         return KERN_FAILURE;
 239         } else {
 240                 /* boot_cpu is always 0 */
 241                 target_cpu = 0;
 242         }
 243
 244         per_proc_info[target_cpu].cpu_id = processor_info->cpu_id;
 245         per_proc_info[target_cpu].start_paddr = processor_info->start_paddr;
 246
 247         donap = processor_info->supports_nap;           /* Assume we use requested nap */
 248         if(forcenap) donap = forcenap - 1;                      /* If there was an override, use that */
 249
 250         if(per_proc_info[target_cpu].pf.Available & pfCanNap)
 251           if(donap)
 252                 per_proc_info[target_cpu].pf.Available |= pfWillNap;
 253
 254         if(processor_info->time_base_enable !=  (void(*)(cpu_id_t, boolean_t ))NULL)
 255                 per_proc_info[target_cpu].time_base_enable = processor_info->time_base_enable;
 256         else
 257                 per_proc_info[target_cpu].time_base_enable = (void(*)(cpu_id_t, boolean_t ))NULL;
 258
 259         if(target_cpu == cpu_number())
 260                 __asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));       /* Set live value */
 261
 262         *processor = cpu_to_processor(target_cpu);
 263         *ipi_handler = cpu_signal_handler;
 264
 265         return KERN_SUCCESS;
 266 }
 267
 268 boolean_t
 269 ml_enable_nap(int target_cpu, boolean_t nap_enabled)
 270 {
 271     boolean_t prev_value = (per_proc_info[target_cpu].pf.Available & pfCanNap) && (per_proc_info[target_cpu].pf.Available & pfWillNap);
 272
 273         if(forcenap) nap_enabled = forcenap - 1;                /* If we are to force nap on or off, do it */
 274
 275         if(per_proc_info[target_cpu].pf.Available & pfCanNap) {                         /* Can the processor nap? */
 276                 if (nap_enabled) per_proc_info[target_cpu].pf.Available |= pfWillNap;   /* Is nap supported on this machine? */
 277                 else per_proc_info[target_cpu].pf.Available &= ~pfWillNap;              /* Clear if not */
 278         }
 279
 280         if(target_cpu == cpu_number())
 281                 __asm__ volatile("mtsprg 2,%0" : : "r" (per_proc_info[target_cpu].pf.Available));       /* Set live value */
 282
 283     return (prev_value);
 284 }
 285
 286 void
 287 ml_init_max_cpus(unsigned long max_cpus)
 288 {
 289         boolean_t current_state;
 290
 291         current_state = ml_set_interrupts_enabled(FALSE);
 292         if (max_cpus_initialized != MAX_CPUS_SET) {
 293                 if (max_cpus > 0 && max_cpus < NCPUS)
 294                         machine_info.max_cpus = max_cpus;
 295                 if (max_cpus_initialized == MAX_CPUS_WAIT)
 296                         wakeup((event_t)&max_cpus_initialized);
 297                 max_cpus_initialized = MAX_CPUS_SET;
 298         }
 299         (void) ml_set_interrupts_enabled(current_state);
 300 }
 301
 302 int
 303 ml_get_max_cpus(void)
 304 {
 305         boolean_t current_state;
 306
 307         current_state = ml_set_interrupts_enabled(FALSE);
 308         if (max_cpus_initialized != MAX_CPUS_SET) {
 309                 max_cpus_initialized = MAX_CPUS_WAIT;
 310                 assert_wait((event_t)&max_cpus_initialized, THREAD_UNINT);
 311                 (void)thread_block(THREAD_CONTINUE_NULL);
 312         }
 313         (void) ml_set_interrupts_enabled(current_state);
 314         return(machine_info.max_cpus);
 315 }
 316
 317 int
 318 ml_get_current_cpus(void)
 319 {
 320         return machine_info.avail_cpus;
 321 }
 322
 323 void
 324 ml_cpu_get_info(ml_cpu_info_t *cpu_info)
 325 {
 326   if (cpu_info == 0) return;
 327
 328   cpu_info->vector_unit = (per_proc_info[0].pf.Available & pfAltivec) != 0;
 329   cpu_info->cache_line_size = per_proc_info[0].pf.lineSize;
 330   cpu_info->l1_icache_size = per_proc_info[0].pf.l1iSize;
 331   cpu_info->l1_dcache_size = per_proc_info[0].pf.l1dSize;
 332
 333   if (per_proc_info[0].pf.Available & pfL2) {
 334     cpu_info->l2_settings = per_proc_info[0].pf.l2cr;
 335     cpu_info->l2_cache_size = per_proc_info[0].pf.l2Size;
 336   } else {
 337     cpu_info->l2_settings = 0;
 338     cpu_info->l2_cache_size = 0xFFFFFFFF;
 339   }
 340   if (per_proc_info[0].pf.Available & pfL3) {
 341     cpu_info->l3_settings = per_proc_info[0].pf.l3cr;
 342     cpu_info->l3_cache_size = per_proc_info[0].pf.l3Size;
 343   } else {
 344     cpu_info->l3_settings = 0;
 345     cpu_info->l3_cache_size = 0xFFFFFFFF;
 346   }
 347 }
 348
 349 #define l2em 0x80000000
 350 #define l3em 0x80000000
 351
 352 extern int real_ncpus;
 353
 354 int
 355 ml_enable_cache_level(int cache_level, int enable)
 356 {
 357   int old_mode;
 358   unsigned long available, ccr;
 359
 360   if (real_ncpus != 1) return -1;
 361
 362   available = per_proc_info[0].pf.Available;
 363
 364   if ((cache_level == 2) && (available & pfL2)) {
 365     ccr = per_proc_info[0].pf.l2cr;
 366     old_mode = (ccr & l2em) ? TRUE : FALSE;
 367     if (old_mode != enable) {
 368       if (enable) ccr = per_proc_info[0].pf.l2crOriginal;
 369       else ccr = 0;
 370       per_proc_info[0].pf.l2cr = ccr;
 371       cacheInit();
 372     }
 373
 374     return old_mode;
 375   }
 376
 377   if ((cache_level == 3) && (available & pfL3)) {
 378     ccr = per_proc_info[0].pf.l3cr;
 379     old_mode = (ccr & l3em) ? TRUE : FALSE;
 380     if (old_mode != enable) {
 381       if (enable) ccr = per_proc_info[0].pf.l3crOriginal;
 382       else ccr = 0;
 383       per_proc_info[0].pf.l3cr = ccr;
 384       cacheInit();
 385     }
 386
 387     return old_mode;
 388   }
 389
 390   return -1;
 391 }
 392
 393 void
 394 init_ast_check(processor_t processor)
 395 {}
 396
 397 void
 398 cause_ast_check(
 399         processor_t             processor)
 400 {
 401         if (    processor != current_processor()                                                                &&
 402                 per_proc_info[processor->slot_num].interrupts_enabled == TRUE   )
 403                 cpu_signal(processor->slot_num, SIGPast, NULL, NULL);
 404 }
 405
 406 thread_t
 407 switch_to_shutdown_context(
 408         thread_t        thread,
 409         void            (*doshutdown)(processor_t),
 410         processor_t     processor)
 411 {
 412         CreateShutdownCTX();
 413         return((thread_t)(per_proc_info[cpu_number()].old_thread));
 414 }
 415
 416 int
 417 set_be_bit()
 418 {
 419
 420         int mycpu;
 421         boolean_t current_state;
 422
 423         current_state = ml_set_interrupts_enabled(FALSE);       /* Can't allow interruptions when mucking with per_proc flags */
 424         mycpu = cpu_number();
 425         per_proc_info[mycpu].cpu_flags |= traceBE;
 426         (void) ml_set_interrupts_enabled(current_state);
 427         return(1);
 428 }
 429
 430 int
 431 clr_be_bit()
 432 {
 433         int mycpu;
 434         boolean_t current_state;
 435
 436         current_state = ml_set_interrupts_enabled(FALSE);       /* Can't allow interruptions when mucking with per_proc flags */
 437         mycpu = cpu_number();
 438         per_proc_info[mycpu].cpu_flags &= ~traceBE;
 439         (void) ml_set_interrupts_enabled(current_state);
 440         return(1);
 441 }
 442
 443 int
 444 be_tracing()
 445 {
 446   int mycpu = cpu_number();
 447   return(per_proc_info[mycpu].cpu_flags & traceBE);
 448 }
 449