1 /* $NetBSD: hpc_machdep.c,v 1.94 2009/11/27 03:23:09 rmind 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 1.94 2009/11/27 03:23:09 rmind 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 #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 pmf_system_shutdown(boothowto); 211 printf("Halted while still in the ICE age.\n"); 212 printf("The operating system has halted.\n"); 213 printf("Please press any key to reboot.\n\n"); 214 cngetc(); 215 printf("rebooting...\n"); 216 cpu_reset(); 217 /* NOTREACHED */ 218 } 219 220 /* Reset the sleep function. */ 221 __sleep_func = NULL; 222 __sleep_ctx = NULL; 223 224 /* Disable console buffering. */ 225 cnpollc(1); 226 227 /* 228 * If RB_NOSYNC was not specified sync the discs. 229 * Note: Unless cold is set to 1 here, syslogd will die during 230 * the unmount. It looks like syslogd is getting woken up only 231 * to find that it cannot page part of the binary in as the 232 * file system has been unmounted. 233 */ 234 if (!(howto & RB_NOSYNC)) 235 bootsync(); 236 237 /* Say NO to interrupts. */ 238 (void)splhigh(); 239 240 /* Do a dump if requested. */ 241 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 242 dumpsys(); 243 244 /* Run any shutdown hooks. */ 245 doshutdownhooks(); 246 247 pmf_system_shutdown(boothowto); 248 249 /* Make sure IRQs are disabled. */ 250 IRQdisable; 251 252 if (howto & RB_HALT) { 253 printf("The operating system has halted.\n"); 254 printf("Please press any key to reboot.\n\n"); 255 cngetc(); 256 } 257 258 printf("rebooting...\n"); 259 cpu_reset(); 260 /* NOTREACHED */ 261 } 262 263 /* Number of DRAM pages which are installed */ 264 /* Units are 4K pages, so 8192 is 32 MB of memory */ 265 #ifndef DRAM_PAGES 266 #define DRAM_PAGES 8192 267 #endif 268 269 /* 270 * Static device mappings. These peripheral registers are mapped at 271 * fixed virtual addresses very early in initarm() so that we can use 272 * them while booting the kernel and stay at the same address 273 * throughout whole kernel's life time. 274 */ 275 static const struct pmap_devmap sa11x0_devmap[] = { 276 /* Physical/virtual address for UART #3. */ 277 { 278 SACOM3_VBASE, 279 SACOM3_BASE, 280 0x24, 281 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE 282 }, 283 { 0, 0, 0, 0, 0 } 284 }; 285 286 /* 287 * Initial entry point on startup. This gets called before main() is 288 * entered. 289 * It should be responsible for setting up everything that must be 290 * in place when main is called. 291 * This includes: 292 * Taking a copy of the boot configuration structure. 293 * Initializing the physical console so characters can be printed. 294 * Setting up page tables for the kernel. 295 */ 296 u_int 297 initarm(int argc, char **argv, struct bootinfo *bi) 298 { 299 u_int kerneldatasize, symbolsize; 300 u_int l1pagetable; 301 vaddr_t freemempos; 302 vsize_t pt_size; 303 int loop, i; 304 #if NKSYMS || defined(DDB) || defined(MODULAR) 305 Elf_Shdr *sh; 306 #endif 307 308 __sleep_func = NULL; 309 __sleep_ctx = NULL; 310 311 /* 312 * Heads up ... Setup the CPU / MMU / TLB functions. 313 */ 314 set_cpufuncs(); 315 IRQdisable; 316 317 #ifdef DEBUG_BEFOREMMU 318 /* 319 * At this point, we cannot call real consinit(). 320 * Just call a faked up version of consinit(), which does the thing 321 * with MMU disabled. 322 */ 323 fakecninit(); 324 #endif 325 326 /* 327 * XXX for now, overwrite bootconfig to hardcoded values. 328 * XXX kill bootconfig and directly call uvm_physload 329 */ 330 bootconfig.dram[0].address = 0xc0000000; 331 bootconfig.dram[0].pages = DRAM_PAGES; 332 bootconfig.dramblocks = 1; 333 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 334 335 symbolsize = 0; 336 #if NKSYMS || defined(DDB) || defined(MODULAR) 337 if (!memcmp(&end, "\177ELF", 4)) { 338 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 339 loop = ((Elf_Ehdr *)&end)->e_shnum; 340 for (; loop; loop--, sh++) 341 if (sh->sh_offset > 0 && 342 (sh->sh_offset + sh->sh_size) > symbolsize) 343 symbolsize = sh->sh_offset + sh->sh_size; 344 } 345 #endif 346 347 printf("kernsize=0x%x\n", kerneldatasize); 348 kerneldatasize += symbolsize; 349 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 350 PAGE_SIZE * 8; 351 352 /* parse kernel args */ 353 boothowto = 0; 354 boot_file[0] = '\0'; 355 strncpy(booted_kernel_storage, argv[0], sizeof(booted_kernel_storage)); 356 for (i = 1; i < argc; i++) { 357 char *cp = argv[i]; 358 359 switch (*cp) { 360 case 'b': 361 /* boot device: -b=sd0 etc. */ 362 cp = cp + 2; 363 #ifdef NFS 364 if (strcmp(cp, MOUNT_NFS) == 0) 365 rootfstype = MOUNT_NFS; 366 else 367 strncpy(boot_file, cp, sizeof(boot_file)); 368 #else /* !NFS */ 369 strncpy(boot_file, cp, sizeof(boot_file)); 370 #endif /* !NFS */ 371 break; 372 default: 373 BOOT_FLAG(*cp, boothowto); 374 break; 375 } 376 } 377 378 /* copy bootinfo into known kernel space */ 379 bootinfo_storage = *bi; 380 bootinfo = &bootinfo_storage; 381 382 #ifdef BOOTINFO_FB_WIDTH 383 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 384 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 385 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 386 bootinfo->fb_type = BOOTINFO_FB_TYPE; 387 #endif 388 389 /* 390 * hpcboot has loaded me with MMU disabled. 391 * So create kernel page tables and enable MMU. 392 */ 393 394 /* 395 * Set up the variables that define the availability of physcial 396 * memory. 397 */ 398 physical_start = bootconfig.dram[0].address; 399 physical_freestart = physical_start 400 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 401 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 402 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 403 physical_freeend = physical_end; 404 405 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 406 physmem += bootconfig.dram[loop].pages; 407 408 /* XXX handle UMA framebuffer memory */ 409 410 /* Use the first 256kB to allocate things */ 411 freemempos = KERNEL_BASE; 412 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 413 414 /* 415 * Right. We have the bottom meg of memory mapped to 0x00000000 416 * so was can get at it. The kernel will occupy the start of it. 417 * After the kernel/args we allocate some of the fixed page tables 418 * we need to get the system going. 419 * We allocate one page directory and NUM_KERNEL_PTS page tables 420 * and store the physical addresses in the kernel_pt_table array. 421 * Must remember that neither the page L1 or L2 page tables are the 422 * same size as a page ! 423 * 424 * Ok, the next bit of physical allocate may look complex but it is 425 * simple really. I have done it like this so that no memory gets 426 * wasted during the allocate of various pages and tables that are 427 * all different sizes. 428 * The start address will be page aligned. 429 * We allocate the kernel page directory on the first free 16KB 430 * boundary we find. 431 * We allocate the kernel page tables on the first 1KB boundary we 432 * find. We allocate at least 9 PT's (12 currently). This means 433 * that in the process we KNOW that we will encounter at least one 434 * 16KB boundary. 435 * 436 * Eventually if the top end of the memory gets used for process L1 437 * page tables the kernel L1 page table may be moved up there. 438 */ 439 440 #ifdef VERBOSE_INIT_ARM 441 printf("Allocating page tables\n"); 442 #endif 443 444 /* Define a macro to simplify memory allocation */ 445 #define valloc_pages(var, np) \ 446 (var).pv_pa = (var).pv_va = freemempos; \ 447 freemempos += (np) * PAGE_SIZE; 448 #define alloc_pages(var, np) \ 449 (var) = freemempos; \ 450 freemempos += (np) * PAGE_SIZE; 451 452 453 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 454 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 455 alloc_pages(kernel_pt_table[loop].pv_pa, 456 L2_TABLE_SIZE / PAGE_SIZE); 457 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 458 } 459 460 /* 461 * Allocate a page for the system page mapped to V0x00000000 462 * This page will just contain the system vectors and can be 463 * shared by all processes. 464 */ 465 valloc_pages(systempage, 1); 466 467 pt_size = round_page(freemempos) - KERNEL_BASE; 468 469 /* Allocate stacks for all modes */ 470 valloc_pages(irqstack, IRQ_STACK_SIZE); 471 valloc_pages(abtstack, ABT_STACK_SIZE); 472 valloc_pages(undstack, UND_STACK_SIZE); 473 valloc_pages(kernelstack, UPAGES); 474 475 #ifdef VERBOSE_INIT_ARM 476 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 477 irqstack.pv_va); 478 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 479 abtstack.pv_va); 480 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 481 undstack.pv_va); 482 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 483 kernelstack.pv_va); 484 #endif 485 486 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 487 488 /* 489 * XXX Actually, we only need virtual space and don't need 490 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 491 */ 492 /* 493 * XXX totally stuffed hack to work round problems introduced 494 * in recent versions of the pmap code. Due to the calls used there 495 * we cannot allocate virtual memory during bootstrap. 496 */ 497 for (;;) { 498 alloc_pages(sa1_cc_base, 1); 499 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 500 break; 501 } 502 { 503 vaddr_t dummy; 504 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 505 } 506 sa1_cache_clean_addr = sa1_cc_base; 507 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 508 509 alloc_pages(sa11x0_idle_mem, 1); 510 511 /* 512 * Ok, we have allocated physical pages for the primary kernel 513 * page tables. 514 */ 515 516 #ifdef VERBOSE_INIT_ARM 517 printf("Creating L1 page table\n"); 518 #endif 519 520 /* 521 * Now we start construction of the L1 page table. 522 * We start by mapping the L2 page tables into the L1. 523 * This means that we can replace L1 mappings later on if necessary. 524 */ 525 l1pagetable = kernel_l1pt.pv_pa; 526 527 /* Map the L2 pages tables in the L1 page table */ 528 pmap_link_l2pt(l1pagetable, 0x00000000, 529 &kernel_pt_table[KERNEL_PT_SYS]); 530 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 531 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 532 &kernel_pt_table[KERNEL_PT_IO]); 533 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 534 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 535 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 536 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 537 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 538 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 539 540 /* update the top of the kernel VM */ 541 pmap_curmaxkvaddr = 542 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("Mapping kernel\n"); 546 #endif 547 548 /* Now we fill in the L2 pagetable for the kernel code/data */ 549 550 /* 551 * XXX there is no ELF header to find RO region. 552 * XXX What should we do? 553 */ 554 #if 0 555 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 556 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 557 physical_start, kernexec->a_text, 558 VM_PROT_READ, PTE_CACHE); 559 logical += pmap_map_chunk(l1pagetable, 560 KERNEL_TEXT_BASE + logical, physical_start + logical, 561 kerneldatasize - kernexec->a_text, 562 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 563 } else 564 #endif 565 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 566 KERNEL_TEXT_BASE, kerneldatasize, 567 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 568 569 #ifdef VERBOSE_INIT_ARM 570 printf("Constructing L2 page tables\n"); 571 #endif 572 573 /* Map the stack pages */ 574 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 575 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 576 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 577 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 579 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 581 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 583 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 584 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 585 586 /* Map page tables */ 587 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 588 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 589 590 /* Map a page for entering idle mode */ 591 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 592 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 593 594 /* Map the vector page. */ 595 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 596 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 598 /* Map the statically mapped devices. */ 599 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 600 601 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 602 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 /* 604 * Now we have the real page tables in place so we can switch to them. 605 * Once this is done we will be running with the REAL kernel page 606 * tables. 607 */ 608 609 printf("done.\n"); 610 611 /* 612 * Pages were allocated during the secondary bootstrap for the 613 * stacks for different CPU modes. 614 * We must now set the r13 registers in the different CPU modes to 615 * point to these stacks. 616 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 617 * of the stack memory. 618 */ 619 printf("init subsystems: stacks "); 620 621 set_stackptr(PSR_IRQ32_MODE, 622 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 623 set_stackptr(PSR_ABT32_MODE, 624 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 625 set_stackptr(PSR_UND32_MODE, 626 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 627 #ifdef PMAP_DEBUG 628 if (pmap_debug_level >= 0) 629 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 630 kernelstack.pv_pa); 631 #endif /* PMAP_DEBUG */ 632 633 /* 634 * Well we should set a data abort handler. 635 * Once things get going this will change as we will need a proper 636 * handler. Until then we will use a handler that just panics but 637 * tells us why. 638 * Initialization of the vectors will just panic on a data abort. 639 * This just fills in a slightly better one. 640 */ 641 printf("vectors "); 642 data_abort_handler_address = (u_int)data_abort_handler; 643 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 644 undefined_handler_address = (u_int)undefinedinstruction_bounce; 645 printf("%08x %08x %08x\n", data_abort_handler_address, 646 prefetch_abort_handler_address, undefined_handler_address); 647 648 /* Initialize the undefined instruction handlers */ 649 printf("undefined "); 650 undefined_init(); 651 652 /* Set the page table address. */ 653 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 654 setttb(kernel_l1pt.pv_pa); 655 cpu_tlb_flushID(); 656 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 657 658 /* 659 * Moved from cpu_startup() as data_abort_handler() references 660 * this during uvm init. 661 */ 662 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 663 664 #ifdef BOOT_DUMP 665 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 666 dumppages((char *)0xb0100000, 64); /* XXX */ 667 #endif 668 /* Enable MMU, I-cache, D-cache, write buffer. */ 669 cpufunc_control(0x337f, 0x107d); 670 671 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 672 673 consinit(); 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("freemempos=%08lx\n", freemempos); 677 printf("MMU enabled. control=%08x\n", cpu_get_control()); 678 #endif 679 680 /* Load memory into UVM. */ 681 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 682 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 683 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 684 paddr_t dblk_end = dblk_start 685 + (bootconfig.dram[loop].pages * PAGE_SIZE); 686 687 if (dblk_start < physical_freestart) 688 dblk_start = physical_freestart; 689 if (dblk_end > physical_freeend) 690 dblk_end = physical_freeend; 691 692 uvm_page_physload(atop(dblk_start), atop(dblk_end), 693 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 694 } 695 696 /* Boot strap pmap telling it where the kernel page table is */ 697 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 698 699 #ifdef BOOT_DUMP 700 dumppages((char *)kernel_l1pt.pv_va, 16); 701 #endif 702 703 #ifdef DDB 704 db_machine_init(); 705 #endif 706 #if NKSYMS || defined(DDB) || defined(MODULAR) 707 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 708 #endif 709 710 printf("kernsize=0x%x", kerneldatasize); 711 printf(" (including 0x%x symbols)\n", symbolsize); 712 713 #ifdef DDB 714 if (boothowto & RB_KDB) 715 Debugger(); 716 #endif /* DDB */ 717 718 if (bootinfo->magic == BOOTINFO_MAGIC) { 719 platid.dw.dw0 = bootinfo->platid_cpu; 720 platid.dw.dw1 = bootinfo->platid_machine; 721 } 722 723 /* We return the new stack pointer address */ 724 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 725 } 726 727 void 728 machine_sleep(void) 729 { 730 731 if (__sleep_func != NULL) 732 __sleep_func(__sleep_ctx); 733 } 734 735 void 736 machine_standby(void) 737 { 738 739 } 740 741 void 742 consinit(void) 743 { 744 static int consinit_called = 0; 745 746 if (consinit_called != 0) 747 return; 748 749 consinit_called = 1; 750 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 751 cninit(); 752 else { 753 /* 754 * Nothing to do here. Console initialization is done at 755 * autoconf device attach time. 756 */ 757 } 758 } 759 760 #ifdef DEBUG_BEFOREMMU 761 cons_decl(sacom); 762 763 static void 764 fakecninit(void) 765 { 766 static struct consdev fakecntab = cons_init(sacom); 767 cn_tab = &fakecntab; 768 769 (*cn_tab->cn_init)(0); 770 cn_tab->cn_pri = CN_REMOTE; 771 } 772 #endif 773 774 #ifdef BOOT_DUMP 775 static void 776 dumppages(char *start, int nbytes) 777 { 778 char *p = start; 779 char *p1; 780 int i; 781 782 for (i = nbytes; i > 0; i -= 16, p += 16) { 783 for (p1 = p + 15; p != p1; p1--) { 784 if (*p1) 785 break; 786 } 787 if (!*p1) 788 continue; 789 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 790 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 791 (unsigned int)p, 792 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 793 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 794 } 795 } 796 #endif 797