1 /* $NetBSD: hpc_machdep.c,v 1.83 2008/01/19 13:11:17 chris Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 /* 39 * Machine dependent functions for kernel setup. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: hpc_machdep.c,v 1.83 2008/01/19 13:11:17 chris Exp $"); 44 45 #include "opt_ddb.h" 46 #include "opt_pmap_debug.h" 47 #include "fs_nfs.h" 48 #include "ksyms.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/reboot.h> 54 #include <sys/proc.h> 55 #include <sys/msgbuf.h> 56 #include <sys/exec.h> 57 #include <sys/ksyms.h> 58 #include <sys/boot_flag.h> 59 #include <sys/conf.h> /* XXX for consinit related hacks */ 60 61 #if NKSYMS || defined(DDB) || defined(LKM) 62 #include <machine/db_machdep.h> 63 #include <ddb/db_sym.h> 64 #include <ddb/db_extern.h> 65 #ifndef DB_ELFSIZE 66 #error Must define DB_ELFSIZE! 67 #endif 68 #define ELFSIZE DB_ELFSIZE 69 #include <sys/exec_elf.h> 70 #endif 71 72 #include <uvm/uvm.h> 73 74 #include <arm/sa11x0/sa11x0_reg.h> 75 #include <arm/cpuconf.h> 76 #include <arm/undefined.h> 77 78 #include <machine/bootconfig.h> 79 #include <machine/bootinfo.h> 80 #include <machine/cpu.h> 81 #include <machine/frame.h> 82 #include <machine/intr.h> 83 #include <machine/io.h> 84 #include <machine/platid.h> 85 #include <machine/rtc.h> 86 #include <machine/signal.h> 87 88 #include <dev/cons.h> 89 #include <dev/hpc/apm/apmvar.h> 90 #include <dev/hpc/bicons.h> 91 92 #ifdef NFS 93 #include <sys/mount.h> 94 #include <nfs/rpcv2.h> 95 #include <nfs/nfsproto.h> 96 #include <nfs/nfs.h> 97 #include <nfs/nfsmount.h> 98 #endif /* NFS */ 99 100 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 101 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 102 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00C00000) 103 #define KERNEL_VM_SIZE 0x05000000 104 105 /* 106 * Address to call from cpu_reset() to reset the machine. 107 * This is machine architecture dependent as it varies depending 108 * on where the ROM appears when you turn the MMU off. 109 */ 110 u_int cpu_reset_address = 0; 111 112 /* Define various stack sizes in pages */ 113 #define IRQ_STACK_SIZE 1 114 #define ABT_STACK_SIZE 1 115 #define UND_STACK_SIZE 1 116 117 BootConfig bootconfig; /* Boot config storage */ 118 struct bootinfo *bootinfo, bootinfo_storage; 119 static char booted_kernel_storage[80]; 120 char *booted_kernel = booted_kernel_storage; 121 122 paddr_t physical_start; 123 paddr_t physical_freestart; 124 paddr_t physical_freeend; 125 paddr_t physical_end; 126 int physmem = 0; 127 128 #ifndef PMAP_STATIC_L1S 129 int max_processes = 64; /* Default number */ 130 #endif /* !PMAP_STATIC_L1S */ 131 132 133 /* Physical and virtual addresses for some global pages */ 134 pv_addr_t systempage; 135 pv_addr_t irqstack; 136 pv_addr_t undstack; 137 pv_addr_t abtstack; 138 pv_addr_t kernelstack; 139 140 char *boot_args = NULL; 141 char boot_file[16]; 142 143 vaddr_t msgbufphys; 144 145 extern u_int data_abort_handler_address; 146 extern u_int prefetch_abort_handler_address; 147 extern u_int undefined_handler_address; 148 extern int end; 149 150 #ifdef PMAP_DEBUG 151 extern int pmap_debug_level; 152 #endif /* PMAP_DEBUG */ 153 154 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 155 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 156 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 157 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 158 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 159 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 160 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 161 162 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 163 164 struct user *proc0paddr; 165 166 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 167 extern unsigned int sa1_cache_clean_addr; 168 extern unsigned int sa1_cache_clean_size; 169 static vaddr_t sa1_cc_base; 170 171 /* Mode dependent sleep function holder */ 172 void (*__sleep_func)(void *); 173 void *__sleep_ctx; 174 175 /* Non-buffered non-cacheable memory needed to enter idle mode */ 176 extern vaddr_t sa11x0_idle_mem; 177 178 /* Prototypes */ 179 void data_abort_handler(trapframe_t *); 180 void prefetch_abort_handler(trapframe_t *); 181 void undefinedinstruction_bounce(trapframe_t *); 182 void dumpsys(void); 183 u_int cpu_get_control(void); 184 185 u_int initarm(int, char **, struct bootinfo *); 186 187 #ifdef DEBUG_BEFOREMMU 188 static void fakecninit(void); 189 #endif 190 191 #ifdef BOOT_DUMP 192 static void dumppages(char *, int); 193 #endif 194 195 /* 196 * Reboots the system. 197 * 198 * Deal with any syncing, unmounting, dumping and shutdown hooks, 199 * then reset the CPU. 200 */ 201 void 202 cpu_reboot(int howto, char *bootstr) 203 { 204 /* 205 * If we are still cold then hit the air brakes 206 * and crash to earth fast. 207 */ 208 if (cold) { 209 doshutdownhooks(); 210 printf("Halted while still in the ICE age.\n"); 211 printf("The operating system has halted.\n"); 212 printf("Please press any key to reboot.\n\n"); 213 cngetc(); 214 printf("rebooting...\n"); 215 cpu_reset(); 216 /* NOTREACHED */ 217 } 218 219 /* Reset the sleep function. */ 220 __sleep_func = NULL; 221 __sleep_ctx = NULL; 222 223 /* Disable console buffering. */ 224 cnpollc(1); 225 226 /* 227 * If RB_NOSYNC was not specified sync the discs. 228 * Note: Unless cold is set to 1 here, syslogd will die during 229 * the unmount. It looks like syslogd is getting woken up only 230 * to find that it cannot page part of the binary in as the 231 * file system has been unmounted. 232 */ 233 if (!(howto & RB_NOSYNC)) 234 bootsync(); 235 236 /* Say NO to interrupts. */ 237 (void)splhigh(); 238 239 /* Do a dump if requested. */ 240 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 241 dumpsys(); 242 243 /* Run any shutdown hooks. */ 244 doshutdownhooks(); 245 246 /* Make sure IRQs are disabled. */ 247 IRQdisable; 248 249 if (howto & RB_HALT) { 250 printf("The operating system has halted.\n"); 251 printf("Please press any key to reboot.\n\n"); 252 cngetc(); 253 } 254 255 printf("rebooting...\n"); 256 cpu_reset(); 257 /* NOTREACHED */ 258 } 259 260 /* Number of DRAM pages which are installed */ 261 /* Units are 4K pages, so 8192 is 32 MB of memory */ 262 #ifndef DRAM_PAGES 263 #define DRAM_PAGES 8192 264 #endif 265 266 /* 267 * Static device mappings. These peripheral registers are mapped at 268 * fixed virtual addresses very early in initarm() so that we can use 269 * them while booting the kernel and stay at the same address 270 * throughout whole kernel's life time. 271 */ 272 static const struct pmap_devmap sa11x0_devmap[] = { 273 /* Physical/virtual address for UART #3. */ 274 { 275 SACOM3_VBASE, 276 SACOM3_BASE, 277 0x24, 278 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE 279 }, 280 { 0, 0, 0, 0, 0 } 281 }; 282 283 /* 284 * Initial entry point on startup. This gets called before main() is 285 * entered. 286 * It should be responsible for setting up everything that must be 287 * in place when main is called. 288 * This includes: 289 * Taking a copy of the boot configuration structure. 290 * Initializing the physical console so characters can be printed. 291 * Setting up page tables for the kernel. 292 */ 293 u_int 294 initarm(int argc, char **argv, struct bootinfo *bi) 295 { 296 u_int kerneldatasize, symbolsize; 297 u_int l1pagetable; 298 vaddr_t freemempos; 299 pv_addr_t kernel_l1pt; 300 vsize_t pt_size; 301 int loop, i; 302 #if NKSYMS || defined(DDB) || defined(LKM) 303 Elf_Shdr *sh; 304 #endif 305 306 __sleep_func = NULL; 307 __sleep_ctx = NULL; 308 309 /* 310 * Heads up ... Setup the CPU / MMU / TLB functions. 311 */ 312 set_cpufuncs(); 313 314 #ifdef DEBUG_BEFOREMMU 315 /* 316 * At this point, we cannot call real consinit(). 317 * Just call a faked up version of consinit(), which does the thing 318 * with MMU disabled. 319 */ 320 fakecninit(); 321 #endif 322 323 /* 324 * XXX for now, overwrite bootconfig to hardcoded values. 325 * XXX kill bootconfig and directly call uvm_physload 326 */ 327 bootconfig.dram[0].address = 0xc0000000; 328 bootconfig.dram[0].pages = DRAM_PAGES; 329 bootconfig.dramblocks = 1; 330 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 331 332 symbolsize = 0; 333 #if NKSYMS || defined(DDB) || defined(LKM) 334 if (!memcmp(&end, "\177ELF", 4)) { 335 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 336 loop = ((Elf_Ehdr *)&end)->e_shnum; 337 for (; loop; loop--, sh++) 338 if (sh->sh_offset > 0 && 339 (sh->sh_offset + sh->sh_size) > symbolsize) 340 symbolsize = sh->sh_offset + sh->sh_size; 341 } 342 #endif 343 344 printf("kernsize=0x%x\n", kerneldatasize); 345 kerneldatasize += symbolsize; 346 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 347 PAGE_SIZE * 8; 348 349 /* parse kernel args */ 350 boothowto = 0; 351 boot_file[0] = '\0'; 352 strncpy(booted_kernel_storage, argv[0], sizeof(booted_kernel_storage)); 353 for (i = 1; i < argc; i++) { 354 char *cp = argv[i]; 355 356 switch (*cp) { 357 case 'b': 358 /* boot device: -b=sd0 etc. */ 359 cp = cp + 2; 360 #ifdef NFS 361 if (strcmp(cp, "nfs") == 0) 362 mountroot = nfs_mountroot; 363 else 364 strncpy(boot_file, cp, sizeof(boot_file)); 365 #else /* !NFS */ 366 strncpy(boot_file, cp, sizeof(boot_file)); 367 #endif /* !NFS */ 368 break; 369 default: 370 BOOT_FLAG(*cp, boothowto); 371 break; 372 } 373 } 374 375 /* copy bootinfo into known kernel space */ 376 bootinfo_storage = *bi; 377 bootinfo = &bootinfo_storage; 378 379 #ifdef BOOTINFO_FB_WIDTH 380 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 381 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 382 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 383 bootinfo->fb_type = BOOTINFO_FB_TYPE; 384 #endif 385 386 /* 387 * hpcboot has loaded me with MMU disabled. 388 * So create kernel page tables and enable MMU. 389 */ 390 391 /* 392 * Set up the variables that define the availability of physcial 393 * memory. 394 */ 395 physical_start = bootconfig.dram[0].address; 396 physical_freestart = physical_start 397 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 398 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 399 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 400 physical_freeend = physical_end; 401 402 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 403 physmem += bootconfig.dram[loop].pages; 404 405 /* XXX handle UMA framebuffer memory */ 406 407 /* Use the first 256kB to allocate things */ 408 freemempos = KERNEL_BASE; 409 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 410 411 /* 412 * Right. We have the bottom meg of memory mapped to 0x00000000 413 * so was can get at it. The kernel will occupy the start of it. 414 * After the kernel/args we allocate some of the fixed page tables 415 * we need to get the system going. 416 * We allocate one page directory and 8 page tables and store the 417 * physical addresses in the kernel_pt_table array. 418 * Must remember that neither the page L1 or L2 page tables are the 419 * same size as a page ! 420 * 421 * Ok, the next bit of physical allocate may look complex but it is 422 * simple really. I have done it like this so that no memory gets 423 * wasted during the allocate of various pages and tables that are 424 * all different sizes. 425 * The start address will be page aligned. 426 * We allocate the kernel page directory on the first free 16KB 427 * boundary we find. 428 * We allocate the kernel page tables on the first 1KB boundary we find. 429 * We allocate 9 PT's. This means that in the process we 430 * KNOW that we will encounter at least 1 16KB boundary. 431 * 432 * Eventually if the top end of the memory gets used for process L1 433 * page tables the kernel L1 page table may be moved up there. 434 */ 435 436 #ifdef VERBOSE_INIT_ARM 437 printf("Allocating page tables\n"); 438 #endif 439 440 /* Define a macro to simplify memory allocation */ 441 #define valloc_pages(var, np) \ 442 (var).pv_pa = (var).pv_va = freemempos; \ 443 freemempos += (np) * PAGE_SIZE; 444 #define alloc_pages(var, np) \ 445 (var) = freemempos; \ 446 freemempos += (np) * PAGE_SIZE; 447 448 449 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 450 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 451 alloc_pages(kernel_pt_table[loop].pv_pa, 452 L2_TABLE_SIZE / PAGE_SIZE); 453 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 454 } 455 456 /* 457 * Allocate a page for the system page mapped to V0x00000000 458 * This page will just contain the system vectors and can be 459 * shared by all processes. 460 */ 461 valloc_pages(systempage, 1); 462 463 pt_size = round_page(freemempos) - KERNEL_BASE; 464 465 /* Allocate stacks for all modes */ 466 valloc_pages(irqstack, IRQ_STACK_SIZE); 467 valloc_pages(abtstack, ABT_STACK_SIZE); 468 valloc_pages(undstack, UND_STACK_SIZE); 469 valloc_pages(kernelstack, UPAGES); 470 471 #ifdef VERBOSE_INIT_ARM 472 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 473 irqstack.pv_va); 474 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 475 abtstack.pv_va); 476 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 477 undstack.pv_va); 478 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 479 kernelstack.pv_va); 480 #endif 481 482 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 483 484 /* 485 * XXX Actually, we only need virtual space and don't need 486 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 487 */ 488 /* 489 * XXX totally stuffed hack to work round problems introduced 490 * in recent versions of the pmap code. Due to the calls used there 491 * we cannot allocate virtual memory during bootstrap. 492 */ 493 for (;;) { 494 alloc_pages(sa1_cc_base, 1); 495 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 496 break; 497 } 498 { 499 vaddr_t dummy; 500 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 501 } 502 sa1_cache_clean_addr = sa1_cc_base; 503 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 504 505 alloc_pages(sa11x0_idle_mem, 1); 506 507 /* 508 * Ok, we have allocated physical pages for the primary kernel 509 * page tables. 510 */ 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("Creating L1 page table\n"); 514 #endif 515 516 /* 517 * Now we start construction of the L1 page table. 518 * We start by mapping the L2 page tables into the L1. 519 * This means that we can replace L1 mappings later on if necessary. 520 */ 521 l1pagetable = kernel_l1pt.pv_pa; 522 523 /* Map the L2 pages tables in the L1 page table */ 524 pmap_link_l2pt(l1pagetable, 0x00000000, 525 &kernel_pt_table[KERNEL_PT_SYS]); 526 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 527 &kernel_pt_table[KERNEL_PT_KERNEL]); 528 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 529 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 530 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 531 532 /* update the top of the kernel VM */ 533 pmap_curmaxkvaddr = 534 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 535 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 536 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 537 &kernel_pt_table[KERNEL_PT_IO]); 538 539 #ifdef VERBOSE_INIT_ARM 540 printf("Mapping kernel\n"); 541 #endif 542 543 /* Now we fill in the L2 pagetable for the kernel code/data */ 544 545 /* 546 * XXX there is no ELF header to find RO region. 547 * XXX What should we do? 548 */ 549 #if 0 550 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 551 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 552 physical_start, kernexec->a_text, 553 VM_PROT_READ, PTE_CACHE); 554 logical += pmap_map_chunk(l1pagetable, 555 KERNEL_TEXT_BASE + logical, physical_start + logical, 556 kerneldatasize - kernexec->a_text, 557 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 558 } else 559 #endif 560 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 561 KERNEL_TEXT_BASE, kerneldatasize, 562 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 563 564 #ifdef VERBOSE_INIT_ARM 565 printf("Constructing L2 page tables\n"); 566 #endif 567 568 /* Map the stack pages */ 569 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 570 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 572 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 574 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 576 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 577 578 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 579 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 580 581 /* Map page tables */ 582 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 583 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 584 585 /* Map a page for entering idle mode */ 586 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 587 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 588 589 /* Map the vector page. */ 590 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 593 /* Map the statically mapped devices. */ 594 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 595 596 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 597 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 /* 599 * Now we have the real page tables in place so we can switch to them. 600 * Once this is done we will be running with the REAL kernel page 601 * tables. 602 */ 603 604 printf("done.\n"); 605 606 /* 607 * Pages were allocated during the secondary bootstrap for the 608 * stacks for different CPU modes. 609 * We must now set the r13 registers in the different CPU modes to 610 * point to these stacks. 611 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 612 * of the stack memory. 613 */ 614 printf("init subsystems: stacks "); 615 616 set_stackptr(PSR_IRQ32_MODE, 617 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 618 set_stackptr(PSR_ABT32_MODE, 619 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 620 set_stackptr(PSR_UND32_MODE, 621 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 622 #ifdef PMAP_DEBUG 623 if (pmap_debug_level >= 0) 624 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 625 kernelstack.pv_pa); 626 #endif /* PMAP_DEBUG */ 627 628 /* 629 * Well we should set a data abort handler. 630 * Once things get going this will change as we will need a proper 631 * handler. Until then we will use a handler that just panics but 632 * tells us why. 633 * Initialization of the vectors will just panic on a data abort. 634 * This just fills in a slightly better one. 635 */ 636 printf("vectors "); 637 data_abort_handler_address = (u_int)data_abort_handler; 638 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 639 undefined_handler_address = (u_int)undefinedinstruction_bounce; 640 printf("%08x %08x %08x\n", data_abort_handler_address, 641 prefetch_abort_handler_address, undefined_handler_address); 642 643 /* Initialize the undefined instruction handlers */ 644 printf("undefined "); 645 undefined_init(); 646 647 /* Set the page table address. */ 648 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 649 setttb(kernel_l1pt.pv_pa); 650 cpu_tlb_flushID(); 651 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 652 653 /* 654 * Moved from cpu_startup() as data_abort_handler() references 655 * this during uvm init. 656 */ 657 proc0paddr = (struct user *)kernelstack.pv_va; 658 lwp0.l_addr = proc0paddr; 659 660 #ifdef BOOT_DUMP 661 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 662 dumppages((char *)0xb0100000, 64); /* XXX */ 663 #endif 664 /* Enable MMU, I-cache, D-cache, write buffer. */ 665 cpufunc_control(0x337f, 0x107d); 666 667 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 668 669 consinit(); 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("freemempos=%08lx\n", freemempos); 673 printf("MMU enabled. control=%08x\n", cpu_get_control()); 674 #endif 675 676 /* Load memory into UVM. */ 677 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 678 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 679 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 680 paddr_t dblk_end = dblk_start 681 + (bootconfig.dram[loop].pages * PAGE_SIZE); 682 683 if (dblk_start < physical_freestart) 684 dblk_start = physical_freestart; 685 if (dblk_end > physical_freeend) 686 dblk_end = physical_freeend; 687 688 uvm_page_physload(atop(dblk_start), atop(dblk_end), 689 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 690 } 691 692 /* Boot strap pmap telling it where the kernel page table is */ 693 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 694 KERNEL_VM_BASE + KERNEL_VM_SIZE); 695 696 #ifdef BOOT_DUMP 697 dumppages((char *)kernel_l1pt.pv_va, 16); 698 #endif 699 700 #ifdef DDB 701 db_machine_init(); 702 #endif 703 #if NKSYMS || defined(DDB) || defined(LKM) 704 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 705 #endif 706 707 printf("kernsize=0x%x", kerneldatasize); 708 printf(" (including 0x%x symbols)\n", symbolsize); 709 710 #ifdef DDB 711 if (boothowto & RB_KDB) 712 Debugger(); 713 #endif /* DDB */ 714 715 if (bootinfo->magic == BOOTINFO_MAGIC) { 716 platid.dw.dw0 = bootinfo->platid_cpu; 717 platid.dw.dw1 = bootinfo->platid_machine; 718 } 719 720 /* We return the new stack pointer address */ 721 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 722 } 723 724 void 725 machine_sleep(void) 726 { 727 728 if (__sleep_func != NULL) 729 __sleep_func(__sleep_ctx); 730 } 731 732 void 733 machine_standby(void) 734 { 735 736 } 737 738 void 739 consinit(void) 740 { 741 static int consinit_called = 0; 742 743 if (consinit_called != 0) 744 return; 745 746 consinit_called = 1; 747 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 748 cninit(); 749 else { 750 /* 751 * Nothing to do here. Console initialization is done at 752 * autoconf device attach time. 753 */ 754 } 755 } 756 757 #ifdef DEBUG_BEFOREMMU 758 cons_decl(sacom); 759 760 static void 761 fakecninit(void) 762 { 763 static struct consdev fakecntab = cons_init(sacom); 764 cn_tab = &fakecntab; 765 766 (*cn_tab->cn_init)(0); 767 cn_tab->cn_pri = CN_REMOTE; 768 } 769 #endif 770 771 #ifdef BOOT_DUMP 772 static void 773 dumppages(char *start, int nbytes) 774 { 775 char *p = start; 776 char *p1; 777 int i; 778 779 for (i = nbytes; i > 0; i -= 16, p += 16) { 780 for (p1 = p + 15; p != p1; p1--) { 781 if (*p1) 782 break; 783 } 784 if (!*p1) 785 continue; 786 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 787 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 788 (unsigned int)p, 789 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 790 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 791 } 792 } 793 #endif 794