1 /* $NetBSD: hpc_machdep.c,v 1.92 2009/08/11 17:04:18 matt 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 1.92 2009/08/11 17:04:18 matt Exp $"); 44 45 #include "opt_ddb.h" 46 #include "opt_modular.h" 47 #include "opt_pmap_debug.h" 48 #include "fs_nfs.h" 49 #include "ksyms.h" 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/reboot.h> 55 #include <sys/proc.h> 56 #include <sys/msgbuf.h> 57 #include <sys/exec.h> 58 #include <sys/ksyms.h> 59 #include <sys/boot_flag.h> 60 #include <sys/conf.h> /* XXX for consinit related hacks */ 61 #include <sys/device.h> 62 63 #if NKSYMS || defined(DDB) || defined(MODULAR) 64 #include <machine/db_machdep.h> 65 #include <ddb/db_sym.h> 66 #include <ddb/db_extern.h> 67 #ifndef DB_ELFSIZE 68 #error Must define DB_ELFSIZE! 69 #endif 70 #define ELFSIZE DB_ELFSIZE 71 #include <sys/exec_elf.h> 72 #endif 73 74 #include <uvm/uvm.h> 75 76 #include <arm/sa11x0/sa11x0_reg.h> 77 #include <arm/cpuconf.h> 78 #include <arm/undefined.h> 79 80 #include <machine/bootconfig.h> 81 #include <machine/bootinfo.h> 82 #include <machine/cpu.h> 83 #include <machine/frame.h> 84 #include <machine/intr.h> 85 #include <machine/io.h> 86 #include <machine/platid.h> 87 #include <machine/rtc.h> 88 #include <machine/signal.h> 89 90 #include <dev/cons.h> 91 #include <dev/hpc/apm/apmvar.h> 92 #include <dev/hpc/bicons.h> 93 94 #ifdef NFS 95 #include <sys/mount.h> 96 #include <nfs/rpcv2.h> 97 #include <nfs/nfsproto.h> 98 #include <nfs/nfs.h> 99 #include <nfs/nfsmount.h> 100 #endif /* NFS */ 101 102 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 103 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 104 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00C00000) 105 #define KERNEL_VM_SIZE 0x05000000 106 107 /* 108 * Address to call from cpu_reset() to reset the machine. 109 * This is machine architecture dependent as it varies depending 110 * on where the ROM appears when you turn the MMU off. 111 */ 112 u_int cpu_reset_address = 0; 113 114 /* Define various stack sizes in pages */ 115 #define IRQ_STACK_SIZE 1 116 #define ABT_STACK_SIZE 1 117 #define UND_STACK_SIZE 1 118 119 BootConfig bootconfig; /* Boot config storage */ 120 struct bootinfo *bootinfo, bootinfo_storage; 121 static char booted_kernel_storage[80]; 122 char *booted_kernel = booted_kernel_storage; 123 124 paddr_t physical_start; 125 paddr_t physical_freestart; 126 paddr_t physical_freeend; 127 paddr_t physical_end; 128 129 #ifndef PMAP_STATIC_L1S 130 int max_processes = 64; /* Default number */ 131 #endif /* !PMAP_STATIC_L1S */ 132 133 134 /* Physical and virtual addresses for some global pages */ 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_IO 2 /* Page table for mapping IO */ 157 #define KERNEL_PT_KERNEL 3 /* Page table for mapping kernel */ 158 #define KERNEL_PT_KERNEL_NUM 4 159 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 160 /* Page tables for mapping kernel VM */ 161 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 162 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 163 164 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 165 166 struct user *proc0paddr; 167 168 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 169 extern unsigned int sa1_cache_clean_addr; 170 extern unsigned int sa1_cache_clean_size; 171 static vaddr_t sa1_cc_base; 172 173 /* Mode dependent sleep function holder */ 174 void (*__sleep_func)(void *); 175 void *__sleep_ctx; 176 177 /* Non-buffered non-cacheable memory needed to enter idle mode */ 178 extern vaddr_t sa11x0_idle_mem; 179 180 /* Prototypes */ 181 void data_abort_handler(trapframe_t *); 182 void prefetch_abort_handler(trapframe_t *); 183 void undefinedinstruction_bounce(trapframe_t *); 184 void dumpsys(void); 185 u_int cpu_get_control(void); 186 187 u_int initarm(int, char **, struct bootinfo *); 188 189 #ifdef DEBUG_BEFOREMMU 190 static void fakecninit(void); 191 #endif 192 193 #ifdef BOOT_DUMP 194 static void dumppages(char *, int); 195 #endif 196 197 /* 198 * Reboots the system. 199 * 200 * Deal with any syncing, unmounting, dumping and shutdown hooks, 201 * then reset the CPU. 202 */ 203 void 204 cpu_reboot(int howto, char *bootstr) 205 { 206 /* 207 * If we are still cold then hit the air brakes 208 * and crash to earth fast. 209 */ 210 if (cold) { 211 doshutdownhooks(); 212 pmf_system_shutdown(boothowto); 213 printf("Halted while still in the ICE age.\n"); 214 printf("The operating system has halted.\n"); 215 printf("Please press any key to reboot.\n\n"); 216 cngetc(); 217 printf("rebooting...\n"); 218 cpu_reset(); 219 /* NOTREACHED */ 220 } 221 222 /* Reset the sleep function. */ 223 __sleep_func = NULL; 224 __sleep_ctx = NULL; 225 226 /* Disable console buffering. */ 227 cnpollc(1); 228 229 /* 230 * If RB_NOSYNC was not specified sync the discs. 231 * Note: Unless cold is set to 1 here, syslogd will die during 232 * the unmount. It looks like syslogd is getting woken up only 233 * to find that it cannot page part of the binary in as the 234 * file system has been unmounted. 235 */ 236 if (!(howto & RB_NOSYNC)) 237 bootsync(); 238 239 /* Say NO to interrupts. */ 240 (void)splhigh(); 241 242 /* Do a dump if requested. */ 243 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 244 dumpsys(); 245 246 /* Run any shutdown hooks. */ 247 doshutdownhooks(); 248 249 pmf_system_shutdown(boothowto); 250 251 /* Make sure IRQs are disabled. */ 252 IRQdisable; 253 254 if (howto & RB_HALT) { 255 printf("The operating system has halted.\n"); 256 printf("Please press any key to reboot.\n\n"); 257 cngetc(); 258 } 259 260 printf("rebooting...\n"); 261 cpu_reset(); 262 /* NOTREACHED */ 263 } 264 265 /* Number of DRAM pages which are installed */ 266 /* Units are 4K pages, so 8192 is 32 MB of memory */ 267 #ifndef DRAM_PAGES 268 #define DRAM_PAGES 8192 269 #endif 270 271 /* 272 * Static device mappings. These peripheral registers are mapped at 273 * fixed virtual addresses very early in initarm() so that we can use 274 * them while booting the kernel and stay at the same address 275 * throughout whole kernel's life time. 276 */ 277 static const struct pmap_devmap sa11x0_devmap[] = { 278 /* Physical/virtual address for UART #3. */ 279 { 280 SACOM3_VBASE, 281 SACOM3_BASE, 282 0x24, 283 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE 284 }, 285 { 0, 0, 0, 0, 0 } 286 }; 287 288 /* 289 * Initial entry point on startup. This gets called before main() is 290 * entered. 291 * It should be responsible for setting up everything that must be 292 * in place when main is called. 293 * This includes: 294 * Taking a copy of the boot configuration structure. 295 * Initializing the physical console so characters can be printed. 296 * Setting up page tables for the kernel. 297 */ 298 u_int 299 initarm(int argc, char **argv, struct bootinfo *bi) 300 { 301 u_int kerneldatasize, symbolsize; 302 u_int l1pagetable; 303 vaddr_t freemempos; 304 vsize_t pt_size; 305 int loop, i; 306 #if NKSYMS || defined(DDB) || defined(MODULAR) 307 Elf_Shdr *sh; 308 #endif 309 310 __sleep_func = NULL; 311 __sleep_ctx = NULL; 312 313 /* 314 * Heads up ... Setup the CPU / MMU / TLB functions. 315 */ 316 set_cpufuncs(); 317 IRQdisable; 318 319 #ifdef DEBUG_BEFOREMMU 320 /* 321 * At this point, we cannot call real consinit(). 322 * Just call a faked up version of consinit(), which does the thing 323 * with MMU disabled. 324 */ 325 fakecninit(); 326 #endif 327 328 /* 329 * XXX for now, overwrite bootconfig to hardcoded values. 330 * XXX kill bootconfig and directly call uvm_physload 331 */ 332 bootconfig.dram[0].address = 0xc0000000; 333 bootconfig.dram[0].pages = DRAM_PAGES; 334 bootconfig.dramblocks = 1; 335 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 336 337 symbolsize = 0; 338 #if NKSYMS || defined(DDB) || defined(MODULAR) 339 if (!memcmp(&end, "\177ELF", 4)) { 340 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 341 loop = ((Elf_Ehdr *)&end)->e_shnum; 342 for (; loop; loop--, sh++) 343 if (sh->sh_offset > 0 && 344 (sh->sh_offset + sh->sh_size) > symbolsize) 345 symbolsize = sh->sh_offset + sh->sh_size; 346 } 347 #endif 348 349 printf("kernsize=0x%x\n", kerneldatasize); 350 kerneldatasize += symbolsize; 351 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 352 PAGE_SIZE * 8; 353 354 /* parse kernel args */ 355 boothowto = 0; 356 boot_file[0] = '\0'; 357 strncpy(booted_kernel_storage, argv[0], sizeof(booted_kernel_storage)); 358 for (i = 1; i < argc; i++) { 359 char *cp = argv[i]; 360 361 switch (*cp) { 362 case 'b': 363 /* boot device: -b=sd0 etc. */ 364 cp = cp + 2; 365 #ifdef NFS 366 if (strcmp(cp, MOUNT_NFS) == 0) 367 rootfstype = MOUNT_NFS; 368 else 369 strncpy(boot_file, cp, sizeof(boot_file)); 370 #else /* !NFS */ 371 strncpy(boot_file, cp, sizeof(boot_file)); 372 #endif /* !NFS */ 373 break; 374 default: 375 BOOT_FLAG(*cp, boothowto); 376 break; 377 } 378 } 379 380 /* copy bootinfo into known kernel space */ 381 bootinfo_storage = *bi; 382 bootinfo = &bootinfo_storage; 383 384 #ifdef BOOTINFO_FB_WIDTH 385 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 386 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 387 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 388 bootinfo->fb_type = BOOTINFO_FB_TYPE; 389 #endif 390 391 /* 392 * hpcboot has loaded me with MMU disabled. 393 * So create kernel page tables and enable MMU. 394 */ 395 396 /* 397 * Set up the variables that define the availability of physcial 398 * memory. 399 */ 400 physical_start = bootconfig.dram[0].address; 401 physical_freestart = physical_start 402 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 403 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 404 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 405 physical_freeend = physical_end; 406 407 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 408 physmem += bootconfig.dram[loop].pages; 409 410 /* XXX handle UMA framebuffer memory */ 411 412 /* Use the first 256kB to allocate things */ 413 freemempos = KERNEL_BASE; 414 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 415 416 /* 417 * Right. We have the bottom meg of memory mapped to 0x00000000 418 * so was can get at it. The kernel will occupy the start of it. 419 * After the kernel/args we allocate some of the fixed page tables 420 * we need to get the system going. 421 * We allocate one page directory and NUM_KERNEL_PTS page tables 422 * and store the physical addresses in the kernel_pt_table array. 423 * Must remember that neither the page L1 or L2 page tables are the 424 * same size as a page ! 425 * 426 * Ok, the next bit of physical allocate may look complex but it is 427 * simple really. I have done it like this so that no memory gets 428 * wasted during the allocate of various pages and tables that are 429 * all different sizes. 430 * The start address will be page aligned. 431 * We allocate the kernel page directory on the first free 16KB 432 * boundary we find. 433 * We allocate the kernel page tables on the first 1KB boundary we 434 * find. We allocate at least 9 PT's (12 currently). This means 435 * that in the process we KNOW that we will encounter at least one 436 * 16KB boundary. 437 * 438 * Eventually if the top end of the memory gets used for process L1 439 * page tables the kernel L1 page table may be moved up there. 440 */ 441 442 #ifdef VERBOSE_INIT_ARM 443 printf("Allocating page tables\n"); 444 #endif 445 446 /* Define a macro to simplify memory allocation */ 447 #define valloc_pages(var, np) \ 448 (var).pv_pa = (var).pv_va = freemempos; \ 449 freemempos += (np) * PAGE_SIZE; 450 #define alloc_pages(var, np) \ 451 (var) = freemempos; \ 452 freemempos += (np) * PAGE_SIZE; 453 454 455 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 456 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 457 alloc_pages(kernel_pt_table[loop].pv_pa, 458 L2_TABLE_SIZE / PAGE_SIZE); 459 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 460 } 461 462 /* 463 * Allocate a page for the system page mapped to V0x00000000 464 * This page will just contain the system vectors and can be 465 * shared by all processes. 466 */ 467 valloc_pages(systempage, 1); 468 469 pt_size = round_page(freemempos) - KERNEL_BASE; 470 471 /* Allocate stacks for all modes */ 472 valloc_pages(irqstack, IRQ_STACK_SIZE); 473 valloc_pages(abtstack, ABT_STACK_SIZE); 474 valloc_pages(undstack, UND_STACK_SIZE); 475 valloc_pages(kernelstack, UPAGES); 476 477 #ifdef VERBOSE_INIT_ARM 478 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 479 irqstack.pv_va); 480 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 481 abtstack.pv_va); 482 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 483 undstack.pv_va); 484 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 485 kernelstack.pv_va); 486 #endif 487 488 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 489 490 /* 491 * XXX Actually, we only need virtual space and don't need 492 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 493 */ 494 /* 495 * XXX totally stuffed hack to work round problems introduced 496 * in recent versions of the pmap code. Due to the calls used there 497 * we cannot allocate virtual memory during bootstrap. 498 */ 499 for (;;) { 500 alloc_pages(sa1_cc_base, 1); 501 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 502 break; 503 } 504 { 505 vaddr_t dummy; 506 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 507 } 508 sa1_cache_clean_addr = sa1_cc_base; 509 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 510 511 alloc_pages(sa11x0_idle_mem, 1); 512 513 /* 514 * Ok, we have allocated physical pages for the primary kernel 515 * page tables. 516 */ 517 518 #ifdef VERBOSE_INIT_ARM 519 printf("Creating L1 page table\n"); 520 #endif 521 522 /* 523 * Now we start construction of the L1 page table. 524 * We start by mapping the L2 page tables into the L1. 525 * This means that we can replace L1 mappings later on if necessary. 526 */ 527 l1pagetable = kernel_l1pt.pv_pa; 528 529 /* Map the L2 pages tables in the L1 page table */ 530 pmap_link_l2pt(l1pagetable, 0x00000000, 531 &kernel_pt_table[KERNEL_PT_SYS]); 532 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 533 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 534 &kernel_pt_table[KERNEL_PT_IO]); 535 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 536 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 537 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 538 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 539 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 540 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 541 542 /* update the top of the kernel VM */ 543 pmap_curmaxkvaddr = 544 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 545 546 #ifdef VERBOSE_INIT_ARM 547 printf("Mapping kernel\n"); 548 #endif 549 550 /* Now we fill in the L2 pagetable for the kernel code/data */ 551 552 /* 553 * XXX there is no ELF header to find RO region. 554 * XXX What should we do? 555 */ 556 #if 0 557 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 558 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 559 physical_start, kernexec->a_text, 560 VM_PROT_READ, PTE_CACHE); 561 logical += pmap_map_chunk(l1pagetable, 562 KERNEL_TEXT_BASE + logical, physical_start + logical, 563 kerneldatasize - kernexec->a_text, 564 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 565 } else 566 #endif 567 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 568 KERNEL_TEXT_BASE, kerneldatasize, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("Constructing L2 page tables\n"); 573 #endif 574 575 /* Map the stack pages */ 576 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 577 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 579 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 581 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 583 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 585 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 586 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 587 588 /* Map page tables */ 589 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 590 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 591 592 /* Map a page for entering idle mode */ 593 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 595 596 /* Map the vector page. */ 597 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 598 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 600 /* Map the statically mapped devices. */ 601 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 602 603 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 604 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 605 /* 606 * Now we have the real page tables in place so we can switch to them. 607 * Once this is done we will be running with the REAL kernel page 608 * tables. 609 */ 610 611 printf("done.\n"); 612 613 /* 614 * Pages were allocated during the secondary bootstrap for the 615 * stacks for different CPU modes. 616 * We must now set the r13 registers in the different CPU modes to 617 * point to these stacks. 618 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 619 * of the stack memory. 620 */ 621 printf("init subsystems: stacks "); 622 623 set_stackptr(PSR_IRQ32_MODE, 624 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 625 set_stackptr(PSR_ABT32_MODE, 626 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 627 set_stackptr(PSR_UND32_MODE, 628 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 629 #ifdef PMAP_DEBUG 630 if (pmap_debug_level >= 0) 631 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 632 kernelstack.pv_pa); 633 #endif /* PMAP_DEBUG */ 634 635 /* 636 * Well we should set a data abort handler. 637 * Once things get going this will change as we will need a proper 638 * handler. Until then we will use a handler that just panics but 639 * tells us why. 640 * Initialization of the vectors will just panic on a data abort. 641 * This just fills in a slightly better one. 642 */ 643 printf("vectors "); 644 data_abort_handler_address = (u_int)data_abort_handler; 645 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 646 undefined_handler_address = (u_int)undefinedinstruction_bounce; 647 printf("%08x %08x %08x\n", data_abort_handler_address, 648 prefetch_abort_handler_address, undefined_handler_address); 649 650 /* Initialize the undefined instruction handlers */ 651 printf("undefined "); 652 undefined_init(); 653 654 /* Set the page table address. */ 655 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 656 setttb(kernel_l1pt.pv_pa); 657 cpu_tlb_flushID(); 658 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 659 660 /* 661 * Moved from cpu_startup() as data_abort_handler() references 662 * this during uvm init. 663 */ 664 proc0paddr = (struct user *)kernelstack.pv_va; 665 lwp0.l_addr = proc0paddr; 666 667 #ifdef BOOT_DUMP 668 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 669 dumppages((char *)0xb0100000, 64); /* XXX */ 670 #endif 671 /* Enable MMU, I-cache, D-cache, write buffer. */ 672 cpufunc_control(0x337f, 0x107d); 673 674 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 675 676 consinit(); 677 678 #ifdef VERBOSE_INIT_ARM 679 printf("freemempos=%08lx\n", freemempos); 680 printf("MMU enabled. control=%08x\n", cpu_get_control()); 681 #endif 682 683 /* Load memory into UVM. */ 684 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 685 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 686 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 687 paddr_t dblk_end = dblk_start 688 + (bootconfig.dram[loop].pages * PAGE_SIZE); 689 690 if (dblk_start < physical_freestart) 691 dblk_start = physical_freestart; 692 if (dblk_end > physical_freeend) 693 dblk_end = physical_freeend; 694 695 uvm_page_physload(atop(dblk_start), atop(dblk_end), 696 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 697 } 698 699 /* Boot strap pmap telling it where the kernel page table is */ 700 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 701 702 #ifdef BOOT_DUMP 703 dumppages((char *)kernel_l1pt.pv_va, 16); 704 #endif 705 706 #ifdef DDB 707 db_machine_init(); 708 #endif 709 #if NKSYMS || defined(DDB) || defined(MODULAR) 710 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 711 #endif 712 713 printf("kernsize=0x%x", kerneldatasize); 714 printf(" (including 0x%x symbols)\n", symbolsize); 715 716 #ifdef DDB 717 if (boothowto & RB_KDB) 718 Debugger(); 719 #endif /* DDB */ 720 721 if (bootinfo->magic == BOOTINFO_MAGIC) { 722 platid.dw.dw0 = bootinfo->platid_cpu; 723 platid.dw.dw1 = bootinfo->platid_machine; 724 } 725 726 /* We return the new stack pointer address */ 727 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 728 } 729 730 void 731 machine_sleep(void) 732 { 733 734 if (__sleep_func != NULL) 735 __sleep_func(__sleep_ctx); 736 } 737 738 void 739 machine_standby(void) 740 { 741 742 } 743 744 void 745 consinit(void) 746 { 747 static int consinit_called = 0; 748 749 if (consinit_called != 0) 750 return; 751 752 consinit_called = 1; 753 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 754 cninit(); 755 else { 756 /* 757 * Nothing to do here. Console initialization is done at 758 * autoconf device attach time. 759 */ 760 } 761 } 762 763 #ifdef DEBUG_BEFOREMMU 764 cons_decl(sacom); 765 766 static void 767 fakecninit(void) 768 { 769 static struct consdev fakecntab = cons_init(sacom); 770 cn_tab = &fakecntab; 771 772 (*cn_tab->cn_init)(0); 773 cn_tab->cn_pri = CN_REMOTE; 774 } 775 #endif 776 777 #ifdef BOOT_DUMP 778 static void 779 dumppages(char *start, int nbytes) 780 { 781 char *p = start; 782 char *p1; 783 int i; 784 785 for (i = nbytes; i > 0; i -= 16, p += 16) { 786 for (p1 = p + 15; p != p1; p1--) { 787 if (*p1) 788 break; 789 } 790 if (!*p1) 791 continue; 792 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 793 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 794 (unsigned int)p, 795 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 796 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 797 } 798 } 799 #endif 800