1 /* $NetBSD: hpc_machdep.c,v 1.96 2010/03/02 21:17:31 pooka 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 1.96 2010/03/02 21:17:31 pooka Exp $"); 44 45 #include "opt_ddb.h" 46 #include "opt_modular.h" 47 #include "opt_pmap_debug.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 #include <sys/device.h> 61 62 #if NKSYMS || defined(DDB) || defined(MODULAR) 63 #include <machine/db_machdep.h> 64 #include <ddb/db_sym.h> 65 #include <ddb/db_extern.h> 66 #ifndef DB_ELFSIZE 67 #error Must define DB_ELFSIZE! 68 #endif 69 #define ELFSIZE DB_ELFSIZE 70 #include <sys/exec_elf.h> 71 #endif 72 73 #include <uvm/uvm.h> 74 75 #include <arm/sa11x0/sa11x0_reg.h> 76 #include <arm/cpuconf.h> 77 #include <arm/undefined.h> 78 79 #include <machine/bootconfig.h> 80 #include <machine/bootinfo.h> 81 #include <machine/cpu.h> 82 #include <machine/frame.h> 83 #include <machine/intr.h> 84 #include <machine/io.h> 85 #include <machine/platid.h> 86 #include <machine/rtc.h> 87 #include <machine/signal.h> 88 89 #include <dev/cons.h> 90 #include <dev/hpc/apm/apmvar.h> 91 #include <dev/hpc/bicons.h> 92 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 99 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 100 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 101 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00C00000) 102 #define KERNEL_VM_SIZE 0x05000000 103 104 /* 105 * Address to call from cpu_reset() to reset the machine. 106 * This is machine architecture dependent as it varies depending 107 * on where the ROM appears when you turn the MMU off. 108 */ 109 u_int cpu_reset_address = 0; 110 111 /* Define various stack sizes in pages */ 112 #define IRQ_STACK_SIZE 1 113 #define ABT_STACK_SIZE 1 114 #define UND_STACK_SIZE 1 115 116 BootConfig bootconfig; /* Boot config storage */ 117 struct bootinfo *bootinfo, bootinfo_storage; 118 static char booted_kernel_storage[80]; 119 char *booted_kernel = booted_kernel_storage; 120 121 paddr_t physical_start; 122 paddr_t physical_freestart; 123 paddr_t physical_freeend; 124 paddr_t physical_end; 125 126 #ifndef PMAP_STATIC_L1S 127 int max_processes = 64; /* Default number */ 128 #endif /* !PMAP_STATIC_L1S */ 129 130 131 /* Physical and virtual addresses for some global pages */ 132 pv_addr_t irqstack; 133 pv_addr_t undstack; 134 pv_addr_t abtstack; 135 pv_addr_t kernelstack; 136 137 char *boot_args = NULL; 138 char boot_file[16]; 139 140 vaddr_t msgbufphys; 141 142 extern u_int data_abort_handler_address; 143 extern u_int prefetch_abort_handler_address; 144 extern u_int undefined_handler_address; 145 extern int end; 146 147 #ifdef PMAP_DEBUG 148 extern int pmap_debug_level; 149 #endif /* PMAP_DEBUG */ 150 151 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 152 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 153 #define KERNEL_PT_IO 2 /* Page table for mapping IO */ 154 #define KERNEL_PT_KERNEL 3 /* Page table for mapping kernel */ 155 #define KERNEL_PT_KERNEL_NUM 4 156 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 157 /* Page tables for mapping kernel VM */ 158 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 159 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 160 161 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 162 163 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 164 extern unsigned int sa1_cache_clean_addr; 165 extern unsigned int sa1_cache_clean_size; 166 static vaddr_t sa1_cc_base; 167 168 /* Mode dependent sleep function holder */ 169 void (*__sleep_func)(void *); 170 void *__sleep_ctx; 171 172 /* Non-buffered non-cacheable memory needed to enter idle mode */ 173 extern vaddr_t sa11x0_idle_mem; 174 175 /* Prototypes */ 176 void data_abort_handler(trapframe_t *); 177 void prefetch_abort_handler(trapframe_t *); 178 void undefinedinstruction_bounce(trapframe_t *); 179 void dumpsys(void); 180 u_int cpu_get_control(void); 181 182 u_int initarm(int, char **, struct bootinfo *); 183 184 #ifdef DEBUG_BEFOREMMU 185 static void fakecninit(void); 186 #endif 187 188 #ifdef BOOT_DUMP 189 static void dumppages(char *, int); 190 #endif 191 192 /* 193 * Reboots the system. 194 * 195 * Deal with any syncing, unmounting, dumping and shutdown hooks, 196 * then reset the CPU. 197 */ 198 void 199 cpu_reboot(int howto, char *bootstr) 200 { 201 /* 202 * If we are still cold then hit the air brakes 203 * and crash to earth fast. 204 */ 205 if (cold) { 206 doshutdownhooks(); 207 pmf_system_shutdown(boothowto); 208 printf("Halted while still in the ICE age.\n"); 209 printf("The operating system has halted.\n"); 210 printf("Please press any key to reboot.\n\n"); 211 cngetc(); 212 printf("rebooting...\n"); 213 cpu_reset(); 214 /* NOTREACHED */ 215 } 216 217 /* Reset the sleep function. */ 218 __sleep_func = NULL; 219 __sleep_ctx = NULL; 220 221 /* Disable console buffering. */ 222 cnpollc(1); 223 224 /* 225 * If RB_NOSYNC was not specified sync the discs. 226 * Note: Unless cold is set to 1 here, syslogd will die during 227 * the unmount. It looks like syslogd is getting woken up only 228 * to find that it cannot page part of the binary in as the 229 * file system has been unmounted. 230 */ 231 if (!(howto & RB_NOSYNC)) 232 bootsync(); 233 234 /* Say NO to interrupts. */ 235 (void)splhigh(); 236 237 /* Do a dump if requested. */ 238 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 239 dumpsys(); 240 241 /* Run any shutdown hooks. */ 242 doshutdownhooks(); 243 244 pmf_system_shutdown(boothowto); 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 vsize_t pt_size; 300 int loop, i; 301 #if NKSYMS || defined(DDB) || defined(MODULAR) 302 Elf_Shdr *sh; 303 #endif 304 305 __sleep_func = NULL; 306 __sleep_ctx = NULL; 307 308 /* 309 * Heads up ... Setup the CPU / MMU / TLB functions. 310 */ 311 set_cpufuncs(); 312 IRQdisable; 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(MODULAR) 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 if (strcmp(cp, MOUNT_NFS) == 0) 361 rootfstype = MOUNT_NFS; 362 else 363 strncpy(boot_file, cp, sizeof(boot_file)); 364 break; 365 default: 366 BOOT_FLAG(*cp, boothowto); 367 break; 368 } 369 } 370 371 /* copy bootinfo into known kernel space */ 372 bootinfo_storage = *bi; 373 bootinfo = &bootinfo_storage; 374 375 #ifdef BOOTINFO_FB_WIDTH 376 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 377 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 378 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 379 bootinfo->fb_type = BOOTINFO_FB_TYPE; 380 #endif 381 382 /* 383 * hpcboot has loaded me with MMU disabled. 384 * So create kernel page tables and enable MMU. 385 */ 386 387 /* 388 * Set up the variables that define the availability of physcial 389 * memory. 390 */ 391 physical_start = bootconfig.dram[0].address; 392 physical_freestart = physical_start 393 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 394 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 395 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 396 physical_freeend = physical_end; 397 398 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 399 physmem += bootconfig.dram[loop].pages; 400 401 /* XXX handle UMA framebuffer memory */ 402 403 /* Use the first 256kB to allocate things */ 404 freemempos = KERNEL_BASE; 405 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 406 407 /* 408 * Right. We have the bottom meg of memory mapped to 0x00000000 409 * so was can get at it. The kernel will occupy the start of it. 410 * After the kernel/args we allocate some of the fixed page tables 411 * we need to get the system going. 412 * We allocate one page directory and NUM_KERNEL_PTS page tables 413 * and store the physical addresses in the kernel_pt_table array. 414 * Must remember that neither the page L1 or L2 page tables are the 415 * same size as a page ! 416 * 417 * Ok, the next bit of physical allocate may look complex but it is 418 * simple really. I have done it like this so that no memory gets 419 * wasted during the allocate of various pages and tables that are 420 * all different sizes. 421 * The start address will be page aligned. 422 * We allocate the kernel page directory on the first free 16KB 423 * boundary we find. 424 * We allocate the kernel page tables on the first 1KB boundary we 425 * find. We allocate at least 9 PT's (12 currently). This means 426 * that in the process we KNOW that we will encounter at least one 427 * 16KB boundary. 428 * 429 * Eventually if the top end of the memory gets used for process L1 430 * page tables the kernel L1 page table may be moved up there. 431 */ 432 433 #ifdef VERBOSE_INIT_ARM 434 printf("Allocating page tables\n"); 435 #endif 436 437 /* Define a macro to simplify memory allocation */ 438 #define valloc_pages(var, np) \ 439 (var).pv_pa = (var).pv_va = freemempos; \ 440 freemempos += (np) * PAGE_SIZE; 441 #define alloc_pages(var, np) \ 442 (var) = freemempos; \ 443 freemempos += (np) * PAGE_SIZE; 444 445 446 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 447 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 448 alloc_pages(kernel_pt_table[loop].pv_pa, 449 L2_TABLE_SIZE / PAGE_SIZE); 450 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 451 } 452 453 /* 454 * Allocate a page for the system page mapped to V0x00000000 455 * This page will just contain the system vectors and can be 456 * shared by all processes. 457 */ 458 valloc_pages(systempage, 1); 459 460 pt_size = round_page(freemempos) - KERNEL_BASE; 461 462 /* Allocate stacks for all modes */ 463 valloc_pages(irqstack, IRQ_STACK_SIZE); 464 valloc_pages(abtstack, ABT_STACK_SIZE); 465 valloc_pages(undstack, UND_STACK_SIZE); 466 valloc_pages(kernelstack, UPAGES); 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 470 irqstack.pv_va); 471 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 472 abtstack.pv_va); 473 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 474 undstack.pv_va); 475 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 476 kernelstack.pv_va); 477 #endif 478 479 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 480 481 /* 482 * XXX Actually, we only need virtual space and don't need 483 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 484 */ 485 /* 486 * XXX totally stuffed hack to work round problems introduced 487 * in recent versions of the pmap code. Due to the calls used there 488 * we cannot allocate virtual memory during bootstrap. 489 */ 490 for (;;) { 491 alloc_pages(sa1_cc_base, 1); 492 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 493 break; 494 } 495 { 496 vaddr_t dummy; 497 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 498 } 499 sa1_cache_clean_addr = sa1_cc_base; 500 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 501 502 alloc_pages(sa11x0_idle_mem, 1); 503 504 /* 505 * Ok, we have allocated physical pages for the primary kernel 506 * page tables. 507 */ 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("Creating L1 page table\n"); 511 #endif 512 513 /* 514 * Now we start construction of the L1 page table. 515 * We start by mapping the L2 page tables into the L1. 516 * This means that we can replace L1 mappings later on if necessary. 517 */ 518 l1pagetable = kernel_l1pt.pv_pa; 519 520 /* Map the L2 pages tables in the L1 page table */ 521 pmap_link_l2pt(l1pagetable, 0x00000000, 522 &kernel_pt_table[KERNEL_PT_SYS]); 523 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 524 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 525 &kernel_pt_table[KERNEL_PT_IO]); 526 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 527 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 528 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 529 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 530 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 531 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 532 533 /* update the top of the kernel VM */ 534 pmap_curmaxkvaddr = 535 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("Mapping kernel\n"); 539 #endif 540 541 /* Now we fill in the L2 pagetable for the kernel code/data */ 542 543 /* 544 * XXX there is no ELF header to find RO region. 545 * XXX What should we do? 546 */ 547 #if 0 548 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 549 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 550 physical_start, kernexec->a_text, 551 VM_PROT_READ, PTE_CACHE); 552 logical += pmap_map_chunk(l1pagetable, 553 KERNEL_TEXT_BASE + logical, physical_start + logical, 554 kerneldatasize - kernexec->a_text, 555 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 556 } else 557 #endif 558 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 559 KERNEL_TEXT_BASE, kerneldatasize, 560 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Constructing L2 page tables\n"); 564 #endif 565 566 /* Map the stack pages */ 567 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 568 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 570 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 572 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 574 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 577 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 578 579 /* Map page tables */ 580 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 581 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 582 583 /* Map a page for entering idle mode */ 584 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 586 587 /* Map the vector page. */ 588 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 589 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 590 591 /* Map the statically mapped devices. */ 592 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 593 594 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 595 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 596 /* 597 * Now we have the real page tables in place so we can switch to them. 598 * Once this is done we will be running with the REAL kernel page 599 * tables. 600 */ 601 602 printf("done.\n"); 603 604 /* 605 * Pages were allocated during the secondary bootstrap for the 606 * stacks for different CPU modes. 607 * We must now set the r13 registers in the different CPU modes to 608 * point to these stacks. 609 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 610 * of the stack memory. 611 */ 612 printf("init subsystems: stacks "); 613 614 set_stackptr(PSR_IRQ32_MODE, 615 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 616 set_stackptr(PSR_ABT32_MODE, 617 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 618 set_stackptr(PSR_UND32_MODE, 619 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 620 #ifdef PMAP_DEBUG 621 if (pmap_debug_level >= 0) 622 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 623 kernelstack.pv_pa); 624 #endif /* PMAP_DEBUG */ 625 626 /* 627 * Well we should set a data abort handler. 628 * Once things get going this will change as we will need a proper 629 * handler. Until then we will use a handler that just panics but 630 * tells us why. 631 * Initialization of the vectors will just panic on a data abort. 632 * This just fills in a slightly better one. 633 */ 634 printf("vectors "); 635 data_abort_handler_address = (u_int)data_abort_handler; 636 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 637 undefined_handler_address = (u_int)undefinedinstruction_bounce; 638 printf("%08x %08x %08x\n", data_abort_handler_address, 639 prefetch_abort_handler_address, undefined_handler_address); 640 641 /* Initialize the undefined instruction handlers */ 642 printf("undefined "); 643 undefined_init(); 644 645 /* Set the page table address. */ 646 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 647 cpu_setttb(kernel_l1pt.pv_pa); 648 cpu_tlb_flushID(); 649 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 650 651 /* 652 * Moved from cpu_startup() as data_abort_handler() references 653 * this during uvm init. 654 */ 655 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 656 657 #ifdef BOOT_DUMP 658 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 659 dumppages((char *)0xb0100000, 64); /* XXX */ 660 #endif 661 /* Enable MMU, I-cache, D-cache, write buffer. */ 662 cpufunc_control(0x337f, 0x107d); 663 664 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 665 666 consinit(); 667 668 #ifdef VERBOSE_INIT_ARM 669 printf("freemempos=%08lx\n", freemempos); 670 printf("MMU enabled. control=%08x\n", cpu_get_control()); 671 #endif 672 673 /* Load memory into UVM. */ 674 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 675 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 676 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 677 paddr_t dblk_end = dblk_start 678 + (bootconfig.dram[loop].pages * PAGE_SIZE); 679 680 if (dblk_start < physical_freestart) 681 dblk_start = physical_freestart; 682 if (dblk_end > physical_freeend) 683 dblk_end = physical_freeend; 684 685 uvm_page_physload(atop(dblk_start), atop(dblk_end), 686 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 687 } 688 689 /* Boot strap pmap telling it where the kernel page table is */ 690 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 691 692 #ifdef BOOT_DUMP 693 dumppages((char *)kernel_l1pt.pv_va, 16); 694 #endif 695 696 #ifdef DDB 697 db_machine_init(); 698 #endif 699 #if NKSYMS || defined(DDB) || defined(MODULAR) 700 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 701 #endif 702 703 printf("kernsize=0x%x", kerneldatasize); 704 printf(" (including 0x%x symbols)\n", symbolsize); 705 706 #ifdef DDB 707 if (boothowto & RB_KDB) 708 Debugger(); 709 #endif /* DDB */ 710 711 if (bootinfo->magic == BOOTINFO_MAGIC) { 712 platid.dw.dw0 = bootinfo->platid_cpu; 713 platid.dw.dw1 = bootinfo->platid_machine; 714 } 715 716 /* We return the new stack pointer address */ 717 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 718 } 719 720 void 721 machine_sleep(void) 722 { 723 724 if (__sleep_func != NULL) 725 __sleep_func(__sleep_ctx); 726 } 727 728 void 729 machine_standby(void) 730 { 731 732 } 733 734 void 735 consinit(void) 736 { 737 static int consinit_called = 0; 738 739 if (consinit_called != 0) 740 return; 741 742 consinit_called = 1; 743 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 744 cninit(); 745 else { 746 /* 747 * Nothing to do here. Console initialization is done at 748 * autoconf device attach time. 749 */ 750 } 751 } 752 753 #ifdef DEBUG_BEFOREMMU 754 cons_decl(sacom); 755 756 static void 757 fakecninit(void) 758 { 759 static struct consdev fakecntab = cons_init(sacom); 760 cn_tab = &fakecntab; 761 762 (*cn_tab->cn_init)(0); 763 cn_tab->cn_pri = CN_REMOTE; 764 } 765 #endif 766 767 #ifdef BOOT_DUMP 768 static void 769 dumppages(char *start, int nbytes) 770 { 771 char *p = start; 772 char *p1; 773 int i; 774 775 for (i = nbytes; i > 0; i -= 16, p += 16) { 776 for (p1 = p + 15; p != p1; p1--) { 777 if (*p1) 778 break; 779 } 780 if (!*p1) 781 continue; 782 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 783 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 784 (unsigned int)p, 785 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 786 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 787 } 788 } 789 #endif 790