mv_machdep.c revision 198872
1/*- 2 * Copyright (c) 1994-1998 Mark Brinicombe. 3 * Copyright (c) 1994 Brini. 4 * All rights reserved. 5 * 6 * This code is derived from software written for Brini by Mark Brinicombe 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Brini. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: FreeBSD: //depot/projects/arm/src/sys/arm/at91/kb920x_machdep.c, rev 45 36 */ 37 38#include "opt_msgbuf.h" 39#include "opt_ddb.h" 40 41#include <sys/cdefs.h> 42__FBSDID("$FreeBSD: head/sys/arm/mv/mv_machdep.c 198872 2009-11-04 04:41:03Z alc $"); 43 44#define _ARM32_BUS_DMA_PRIVATE 45#include <sys/param.h> 46#include <sys/systm.h> 47#include <sys/sysproto.h> 48#include <sys/signalvar.h> 49#include <sys/imgact.h> 50#include <sys/kernel.h> 51#include <sys/ktr.h> 52#include <sys/linker.h> 53#include <sys/lock.h> 54#include <sys/malloc.h> 55#include <sys/mutex.h> 56#include <sys/pcpu.h> 57#include <sys/proc.h> 58#include <sys/ptrace.h> 59#include <sys/cons.h> 60#include <sys/bio.h> 61#include <sys/bus.h> 62#include <sys/buf.h> 63#include <sys/exec.h> 64#include <sys/kdb.h> 65#include <sys/msgbuf.h> 66#include <machine/reg.h> 67#include <machine/cpu.h> 68 69#include <vm/vm.h> 70#include <vm/pmap.h> 71#include <vm/vm_object.h> 72#include <vm/vm_page.h> 73#include <vm/vm_pager.h> 74#include <vm/vm_map.h> 75#include <machine/pte.h> 76#include <machine/pmap.h> 77#include <machine/vmparam.h> 78#include <machine/pcb.h> 79#include <machine/undefined.h> 80#include <machine/machdep.h> 81#include <machine/metadata.h> 82#include <machine/armreg.h> 83#include <machine/bus.h> 84#include <sys/reboot.h> 85#include <machine/bootinfo.h> 86 87#include <arm/mv/mvvar.h> /* XXX eventually this should be eliminated */ 88#include <arm/mv/mvwin.h> 89 90#ifdef DEBUG 91#define debugf(fmt, args...) printf(fmt, ##args) 92#else 93#define debugf(fmt, args...) 94#endif 95 96/* 97 * This is the number of L2 page tables required for covering max 98 * (hypothetical) memsize of 4GB and all kernel mappings (vectors, msgbuf, 99 * stacks etc.), uprounded to be divisible by 4. 100 */ 101#define KERNEL_PT_MAX 78 102 103/* Define various stack sizes in pages */ 104#define IRQ_STACK_SIZE 1 105#define ABT_STACK_SIZE 1 106#define UND_STACK_SIZE 1 107 108/* Maximum number of memory regions */ 109#define MEM_REGIONS 8 110 111extern unsigned char kernbase[]; 112extern unsigned char _etext[]; 113extern unsigned char _edata[]; 114extern unsigned char __bss_start[]; 115extern unsigned char _end[]; 116 117extern u_int data_abort_handler_address; 118extern u_int prefetch_abort_handler_address; 119extern u_int undefined_handler_address; 120 121extern const struct pmap_devmap *pmap_devmap_bootstrap_table; 122extern vm_offset_t pmap_bootstrap_lastaddr; 123 124struct pv_addr kernel_pt_table[KERNEL_PT_MAX]; 125 126extern int *end; 127 128struct pcpu __pcpu; 129struct pcpu *pcpup = &__pcpu; 130 131/* Physical and virtual addresses for some global pages */ 132 133vm_paddr_t phys_avail[10]; 134vm_paddr_t dump_avail[4]; 135vm_offset_t physical_pages; 136vm_offset_t pmap_bootstrap_lastaddr; 137 138const struct pmap_devmap *pmap_devmap_bootstrap_table; 139struct pv_addr systempage; 140struct pv_addr msgbufpv; 141struct pv_addr irqstack; 142struct pv_addr undstack; 143struct pv_addr abtstack; 144struct pv_addr kernelstack; 145 146static struct trapframe proc0_tf; 147 148struct mem_region { 149 vm_offset_t mr_start; 150 vm_size_t mr_size; 151}; 152 153static struct mem_region availmem_regions[MEM_REGIONS]; 154static int availmem_regions_sz; 155 156struct bootinfo *bootinfo; 157 158static void print_kenv(void); 159static void print_kernel_section_addr(void); 160static void print_bootinfo(void); 161 162static void physmap_init(int); 163 164static char * 165kenv_next(char *cp) 166{ 167 168 if (cp != NULL) { 169 while (*cp != 0) 170 cp++; 171 cp++; 172 if (*cp == 0) 173 cp = NULL; 174 } 175 return (cp); 176} 177 178static void 179print_kenv(void) 180{ 181 int len; 182 char *cp; 183 184 debugf("loader passed (static) kenv:\n"); 185 if (kern_envp == NULL) { 186 debugf(" no env, null ptr\n"); 187 return; 188 } 189 debugf(" kern_envp = 0x%08x\n", (uint32_t)kern_envp); 190 191 len = 0; 192 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp)) 193 debugf(" %x %s\n", (uint32_t)cp, cp); 194} 195 196static void 197print_bootinfo(void) 198{ 199 struct bi_mem_region *mr; 200 struct bi_eth_addr *eth; 201 int i, j; 202 203 debugf("bootinfo:\n"); 204 if (bootinfo == NULL) { 205 debugf(" no bootinfo, null ptr\n"); 206 return; 207 } 208 209 debugf(" version = 0x%08x\n", bootinfo->bi_version); 210 debugf(" ccsrbar = 0x%08x\n", bootinfo->bi_bar_base); 211 debugf(" cpu_clk = 0x%08x\n", bootinfo->bi_cpu_clk); 212 debugf(" bus_clk = 0x%08x\n", bootinfo->bi_bus_clk); 213 214 debugf(" mem regions:\n"); 215 mr = (struct bi_mem_region *)bootinfo->bi_data; 216 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) 217 debugf(" #%d, base = 0x%08x, size = 0x%08x\n", i, 218 mr->mem_base, mr->mem_size); 219 220 debugf(" eth addresses:\n"); 221 eth = (struct bi_eth_addr *)mr; 222 for (i = 0; i < bootinfo->bi_eth_addr_no; i++, eth++) { 223 debugf(" #%d, addr = ", i); 224 for (j = 0; j < 6; j++) 225 debugf("%02x ", eth->mac_addr[j]); 226 debugf("\n"); 227 } 228} 229 230static void 231print_kernel_section_addr(void) 232{ 233 234 debugf("kernel image addresses:\n"); 235 debugf(" kernbase = 0x%08x\n", (uint32_t)kernbase); 236 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext); 237 debugf(" _edata = 0x%08x\n", (uint32_t)_edata); 238 debugf(" __bss_start = 0x%08x\n", (uint32_t)__bss_start); 239 debugf(" _end = 0x%08x\n", (uint32_t)_end); 240} 241 242struct bi_mem_region * 243bootinfo_mr(void) 244{ 245 246 return ((struct bi_mem_region *)bootinfo->bi_data); 247} 248 249static void 250physmap_init(int hardcoded) 251{ 252 int i, j, cnt; 253 vm_offset_t phys_kernelend, kernload; 254 uint32_t s, e, sz; 255 struct mem_region *mp, *mp1; 256 257 phys_kernelend = KERNPHYSADDR + (virtual_avail - KERNVIRTADDR); 258 kernload = KERNPHYSADDR; 259 260 /* 261 * Use hardcoded physical addresses if we don't use memory regions 262 * from metadata. 263 */ 264 if (hardcoded) { 265 phys_avail[0] = 0; 266 phys_avail[1] = kernload; 267 268 phys_avail[2] = phys_kernelend; 269 phys_avail[3] = PHYSMEM_SIZE; 270 271 phys_avail[4] = 0; 272 phys_avail[5] = 0; 273 return; 274 } 275 276 /* 277 * Remove kernel physical address range from avail 278 * regions list. Page align all regions. 279 * Non-page aligned memory isn't very interesting to us. 280 * Also, sort the entries for ascending addresses. 281 */ 282 sz = 0; 283 cnt = availmem_regions_sz; 284 debugf("processing avail regions:\n"); 285 for (mp = availmem_regions; mp->mr_size; mp++) { 286 s = mp->mr_start; 287 e = mp->mr_start + mp->mr_size; 288 debugf(" %08x-%08x -> ", s, e); 289 /* Check whether this region holds all of the kernel. */ 290 if (s < kernload && e > phys_kernelend) { 291 availmem_regions[cnt].mr_start = phys_kernelend; 292 availmem_regions[cnt++].mr_size = e - phys_kernelend; 293 e = kernload; 294 } 295 /* Look whether this regions starts within the kernel. */ 296 if (s >= kernload && s < phys_kernelend) { 297 if (e <= phys_kernelend) 298 goto empty; 299 s = phys_kernelend; 300 } 301 /* Now look whether this region ends within the kernel. */ 302 if (e > kernload && e <= phys_kernelend) { 303 if (s >= kernload) { 304 goto empty; 305 } 306 e = kernload; 307 } 308 /* Now page align the start and size of the region. */ 309 s = round_page(s); 310 e = trunc_page(e); 311 if (e < s) 312 e = s; 313 sz = e - s; 314 debugf("%08x-%08x = %x\n", s, e, sz); 315 316 /* Check whether some memory is left here. */ 317 if (sz == 0) { 318 empty: 319 printf("skipping\n"); 320 bcopy(mp + 1, mp, 321 (cnt - (mp - availmem_regions)) * sizeof(*mp)); 322 cnt--; 323 mp--; 324 continue; 325 } 326 327 /* Do an insertion sort. */ 328 for (mp1 = availmem_regions; mp1 < mp; mp1++) 329 if (s < mp1->mr_start) 330 break; 331 if (mp1 < mp) { 332 bcopy(mp1, mp1 + 1, (char *)mp - (char *)mp1); 333 mp1->mr_start = s; 334 mp1->mr_size = sz; 335 } else { 336 mp->mr_start = s; 337 mp->mr_size = sz; 338 } 339 } 340 availmem_regions_sz = cnt; 341 342 /* Fill in phys_avail table, based on availmem_regions */ 343 debugf("fill in phys_avail:\n"); 344 for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { 345 346 debugf(" region: 0x%08x - 0x%08x (0x%08x)\n", 347 availmem_regions[i].mr_start, 348 availmem_regions[i].mr_start + availmem_regions[i].mr_size, 349 availmem_regions[i].mr_size); 350 351 phys_avail[j] = availmem_regions[i].mr_start; 352 phys_avail[j + 1] = availmem_regions[i].mr_start + 353 availmem_regions[i].mr_size; 354 } 355 phys_avail[j] = 0; 356 phys_avail[j + 1] = 0; 357} 358 359void * 360initarm(void *mdp, void *unused __unused) 361{ 362 struct pv_addr kernel_l1pt; 363 struct pv_addr dpcpu; 364 vm_offset_t freemempos, l2_start, lastaddr; 365 uint32_t memsize, l2size; 366 struct bi_mem_region *mr; 367 void *kmdp; 368 u_int l1pagetable; 369 int i = 0, j = 0; 370 371 kmdp = NULL; 372 lastaddr = 0; 373 memsize = 0; 374 375 set_cpufuncs(); 376 377 /* 378 * Mask metadata pointer: it is supposed to be on page boundary. If 379 * the first argument (mdp) doesn't point to a valid address the 380 * bootloader must have passed us something else than the metadata 381 * ptr... In this case we want to fall back to some built-in settings. 382 */ 383 mdp = (void *)((uint32_t)mdp & ~PAGE_MASK); 384 385 /* Parse metadata and fetch parameters */ 386 if (mdp != NULL) { 387 preload_metadata = mdp; 388 kmdp = preload_search_by_type("elf kernel"); 389 if (kmdp != NULL) { 390 bootinfo = (struct bootinfo *)preload_search_info(kmdp, 391 MODINFO_METADATA|MODINFOMD_BOOTINFO); 392 393 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); 394 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *); 395 lastaddr = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t); 396 } 397 398 /* Initialize memory regions table */ 399 mr = bootinfo_mr(); 400 for (i = 0; i < bootinfo->bi_mem_reg_no; i++, mr++) { 401 if (i == MEM_REGIONS) 402 break; 403 availmem_regions[i].mr_start = mr->mem_base; 404 availmem_regions[i].mr_size = mr->mem_size; 405 memsize += mr->mem_size; 406 } 407 availmem_regions_sz = i; 408 } else { 409 /* Fall back to hardcoded boothowto flags and metadata. */ 410 boothowto = RB_VERBOSE | RB_SINGLE; 411 lastaddr = fake_preload_metadata(); 412 413 /* 414 * Assume a single memory region of size specified in board 415 * configuration file. 416 */ 417 memsize = PHYSMEM_SIZE; 418 } 419 420 /* 421 * If memsize is invalid, we can neither proceed nor panic (too 422 * early for console output). 423 */ 424 if (memsize == 0) 425 while (1); 426 427 /* Platform-specific initialisation */ 428 pmap_bootstrap_lastaddr = MV_BASE - ARM_NOCACHE_KVA_SIZE; 429 pmap_devmap_bootstrap_table = &pmap_devmap[0]; 430 431 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 432 PCPU_SET(curthread, &thread0); 433 434 /* Calculate number of L2 tables needed for mapping vm_page_array */ 435 l2size = (memsize / PAGE_SIZE) * sizeof(struct vm_page); 436 l2size = (l2size >> L1_S_SHIFT) + 1; 437 438 /* 439 * Add one table for end of kernel map, one for stacks, msgbuf and 440 * L1 and L2 tables map and one for vectors map. 441 */ 442 l2size += 3; 443 444 /* Make it divisible by 4 */ 445 l2size = (l2size + 3) & ~3; 446 447#define KERNEL_TEXT_BASE (KERNBASE) 448 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK; 449 450 /* Define a macro to simplify memory allocation */ 451#define valloc_pages(var, np) \ 452 alloc_pages((var).pv_va, (np)); \ 453 (var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR); 454 455#define alloc_pages(var, np) \ 456 (var) = freemempos; \ 457 freemempos += (np * PAGE_SIZE); \ 458 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 459 460 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 461 freemempos += PAGE_SIZE; 462 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 463 464 for (i = 0; i < l2size; ++i) { 465 if (!(i % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 466 valloc_pages(kernel_pt_table[i], 467 L2_TABLE_SIZE / PAGE_SIZE); 468 j = i; 469 } else { 470 kernel_pt_table[i].pv_va = kernel_pt_table[j].pv_va + 471 L2_TABLE_SIZE_REAL * (i - j); 472 kernel_pt_table[i].pv_pa = 473 kernel_pt_table[i].pv_va - KERNVIRTADDR + 474 KERNPHYSADDR; 475 476 } 477 } 478 /* 479 * Allocate a page for the system page mapped to 0x00000000 480 * or 0xffff0000. This page will just contain the system vectors 481 * and can be shared by all processes. 482 */ 483 valloc_pages(systempage, 1); 484 485 /* Allocate dynamic per-cpu area. */ 486 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 487 dpcpu_init((void *)dpcpu.pv_va, 0); 488 489 /* Allocate stacks for all modes */ 490 valloc_pages(irqstack, IRQ_STACK_SIZE); 491 valloc_pages(abtstack, ABT_STACK_SIZE); 492 valloc_pages(undstack, UND_STACK_SIZE); 493 valloc_pages(kernelstack, KSTACK_PAGES); 494 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE); 495 496 /* 497 * Now we start construction of the L1 page table 498 * We start by mapping the L2 page tables into the L1. 499 * This means that we can replace L1 mappings later on if necessary 500 */ 501 l1pagetable = kernel_l1pt.pv_va; 502 503 /* 504 * Try to map as much as possible of kernel text and data using 505 * 1MB section mapping and for the rest of initial kernel address 506 * space use L2 coarse tables. 507 * 508 * Link L2 tables for mapping remainder of kernel (modulo 1MB) 509 * and kernel structures 510 */ 511 l2_start = lastaddr & ~(L1_S_OFFSET); 512 for (i = 0 ; i < l2size - 1; i++) 513 pmap_link_l2pt(l1pagetable, l2_start + i * L1_S_SIZE, 514 &kernel_pt_table[i]); 515 516 pmap_curmaxkvaddr = l2_start + (l2size - 1) * L1_S_SIZE; 517 518 /* Map kernel code and data */ 519 pmap_map_chunk(l1pagetable, KERNVIRTADDR, KERNPHYSADDR, 520 (((uint32_t)(lastaddr) - KERNVIRTADDR) + PAGE_MASK) & ~PAGE_MASK, 521 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 522 523 524 /* Map L1 directory and allocated L2 page tables */ 525 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 526 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 527 528 pmap_map_chunk(l1pagetable, kernel_pt_table[0].pv_va, 529 kernel_pt_table[0].pv_pa, 530 L2_TABLE_SIZE_REAL * l2size, 531 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 532 533 /* Map allocated DPCPU, stacks and msgbuf */ 534 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, 535 freemempos - dpcpu.pv_va, 536 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 537 538 /* Link and map the vector page */ 539 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH, 540 &kernel_pt_table[l2size - 1]); 541 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 542 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 543 544 pmap_devmap_bootstrap(l1pagetable, pmap_devmap_bootstrap_table); 545 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)) | 546 DOMAIN_CLIENT); 547 setttb(kernel_l1pt.pv_pa); 548 cpu_tlb_flushID(); 549 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL * 2)); 550 cninit(); 551 physmem = memsize / PAGE_SIZE; 552 553 debugf("initarm: console initialized\n"); 554 debugf(" arg1 mdp = 0x%08x\n", (uint32_t)mdp); 555 debugf(" boothowto = 0x%08x\n", boothowto); 556 print_bootinfo(); 557 print_kernel_section_addr(); 558 print_kenv(); 559 560 /* 561 * Re-initialise MPP 562 */ 563 platform_mpp_init(); 564 565 /* 566 * Re-initialise decode windows 567 */ 568 if (soc_decode_win() != 0) 569 printf("WARNING: could not re-initialise decode windows! " 570 "Running with existing settings...\n"); 571 /* 572 * Pages were allocated during the secondary bootstrap for the 573 * stacks for different CPU modes. 574 * We must now set the r13 registers in the different CPU modes to 575 * point to these stacks. 576 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 577 * of the stack memory. 578 */ 579 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 580 set_stackptr(PSR_IRQ32_MODE, 581 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 582 set_stackptr(PSR_ABT32_MODE, 583 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 584 set_stackptr(PSR_UND32_MODE, 585 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 586 587 /* 588 * We must now clean the cache again.... 589 * Cleaning may be done by reading new data to displace any 590 * dirty data in the cache. This will have happened in setttb() 591 * but since we are boot strapping the addresses used for the read 592 * may have just been remapped and thus the cache could be out 593 * of sync. A re-clean after the switch will cure this. 594 * After booting there are no gross relocations of the kernel thus 595 * this problem will not occur after initarm(). 596 */ 597 cpu_idcache_wbinv_all(); 598 599 /* Set stack for exception handlers */ 600 data_abort_handler_address = (u_int)data_abort_handler; 601 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 602 undefined_handler_address = (u_int)undefinedinstruction_bounce; 603 undefined_init(); 604 605 proc_linkup0(&proc0, &thread0); 606 thread0.td_kstack = kernelstack.pv_va; 607 thread0.td_kstack_pages = KSTACK_PAGES; 608 thread0.td_pcb = (struct pcb *) 609 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 610 thread0.td_pcb->pcb_flags = 0; 611 thread0.td_frame = &proc0_tf; 612 pcpup->pc_curpcb = thread0.td_pcb; 613 614 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 615 616 dump_avail[0] = 0; 617 dump_avail[1] = memsize; 618 dump_avail[2] = 0; 619 dump_avail[3] = 0; 620 621 pmap_bootstrap(freemempos, pmap_bootstrap_lastaddr, &kernel_l1pt); 622 msgbufp = (void *)msgbufpv.pv_va; 623 msgbufinit(msgbufp, MSGBUF_SIZE); 624 mutex_init(); 625 626 /* 627 * Prepare map of physical memory regions available to vm subsystem. 628 * If metadata pointer doesn't point to a valid address, use hardcoded 629 * values. 630 */ 631 physmap_init((mdp != NULL) ? 0 : 1); 632 633 /* Do basic tuning, hz etc */ 634 init_param1(); 635 init_param2(physmem); 636 kdb_init(); 637 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 638 sizeof(struct pcb))); 639} 640 641struct arm32_dma_range * 642bus_dma_get_range(void) 643{ 644 645 return (NULL); 646} 647 648int 649bus_dma_get_range_nb(void) 650{ 651 652 return (0); 653} 654