1 /* $NetBSD: hpc_machdep.c,v 1.91 2009/02/13 22:41:02 apb 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 1.91 2009/02/13 22:41:02 apb 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 int physmem = 0; 129 130 #ifndef PMAP_STATIC_L1S 131 int max_processes = 64; /* Default number */ 132 #endif /* !PMAP_STATIC_L1S */ 133 134 135 /* Physical and virtual addresses for some global pages */ 136 pv_addr_t irqstack; 137 pv_addr_t undstack; 138 pv_addr_t abtstack; 139 pv_addr_t kernelstack; 140 141 char *boot_args = NULL; 142 char boot_file[16]; 143 144 vaddr_t msgbufphys; 145 146 extern u_int data_abort_handler_address; 147 extern u_int prefetch_abort_handler_address; 148 extern u_int undefined_handler_address; 149 extern int end; 150 151 #ifdef PMAP_DEBUG 152 extern int pmap_debug_level; 153 #endif /* PMAP_DEBUG */ 154 155 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 156 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 157 #define KERNEL_PT_IO 2 /* Page table for mapping IO */ 158 #define KERNEL_PT_KERNEL 3 /* Page table for mapping kernel */ 159 #define KERNEL_PT_KERNEL_NUM 4 160 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 161 /* Page tables for mapping kernel VM */ 162 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 163 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 164 165 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 166 167 struct user *proc0paddr; 168 169 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 170 extern unsigned int sa1_cache_clean_addr; 171 extern unsigned int sa1_cache_clean_size; 172 static vaddr_t sa1_cc_base; 173 174 /* Mode dependent sleep function holder */ 175 void (*__sleep_func)(void *); 176 void *__sleep_ctx; 177 178 /* Non-buffered non-cacheable memory needed to enter idle mode */ 179 extern vaddr_t sa11x0_idle_mem; 180 181 /* Prototypes */ 182 void data_abort_handler(trapframe_t *); 183 void prefetch_abort_handler(trapframe_t *); 184 void undefinedinstruction_bounce(trapframe_t *); 185 void dumpsys(void); 186 u_int cpu_get_control(void); 187 188 u_int initarm(int, char **, struct bootinfo *); 189 190 #ifdef DEBUG_BEFOREMMU 191 static void fakecninit(void); 192 #endif 193 194 #ifdef BOOT_DUMP 195 static void dumppages(char *, int); 196 #endif 197 198 /* 199 * Reboots the system. 200 * 201 * Deal with any syncing, unmounting, dumping and shutdown hooks, 202 * then reset the CPU. 203 */ 204 void 205 cpu_reboot(int howto, char *bootstr) 206 { 207 /* 208 * If we are still cold then hit the air brakes 209 * and crash to earth fast. 210 */ 211 if (cold) { 212 doshutdownhooks(); 213 pmf_system_shutdown(boothowto); 214 printf("Halted while still in the ICE age.\n"); 215 printf("The operating system has halted.\n"); 216 printf("Please press any key to reboot.\n\n"); 217 cngetc(); 218 printf("rebooting...\n"); 219 cpu_reset(); 220 /* NOTREACHED */ 221 } 222 223 /* Reset the sleep function. */ 224 __sleep_func = NULL; 225 __sleep_ctx = NULL; 226 227 /* Disable console buffering. */ 228 cnpollc(1); 229 230 /* 231 * If RB_NOSYNC was not specified sync the discs. 232 * Note: Unless cold is set to 1 here, syslogd will die during 233 * the unmount. It looks like syslogd is getting woken up only 234 * to find that it cannot page part of the binary in as the 235 * file system has been unmounted. 236 */ 237 if (!(howto & RB_NOSYNC)) 238 bootsync(); 239 240 /* Say NO to interrupts. */ 241 (void)splhigh(); 242 243 /* Do a dump if requested. */ 244 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 245 dumpsys(); 246 247 /* Run any shutdown hooks. */ 248 doshutdownhooks(); 249 250 pmf_system_shutdown(boothowto); 251 252 /* Make sure IRQs are disabled. */ 253 IRQdisable; 254 255 if (howto & RB_HALT) { 256 printf("The operating system has halted.\n"); 257 printf("Please press any key to reboot.\n\n"); 258 cngetc(); 259 } 260 261 printf("rebooting...\n"); 262 cpu_reset(); 263 /* NOTREACHED */ 264 } 265 266 /* Number of DRAM pages which are installed */ 267 /* Units are 4K pages, so 8192 is 32 MB of memory */ 268 #ifndef DRAM_PAGES 269 #define DRAM_PAGES 8192 270 #endif 271 272 /* 273 * Static device mappings. These peripheral registers are mapped at 274 * fixed virtual addresses very early in initarm() so that we can use 275 * them while booting the kernel and stay at the same address 276 * throughout whole kernel's life time. 277 */ 278 static const struct pmap_devmap sa11x0_devmap[] = { 279 /* Physical/virtual address for UART #3. */ 280 { 281 SACOM3_VBASE, 282 SACOM3_BASE, 283 0x24, 284 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE 285 }, 286 { 0, 0, 0, 0, 0 } 287 }; 288 289 /* 290 * Initial entry point on startup. This gets called before main() is 291 * entered. 292 * It should be responsible for setting up everything that must be 293 * in place when main is called. 294 * This includes: 295 * Taking a copy of the boot configuration structure. 296 * Initializing the physical console so characters can be printed. 297 * Setting up page tables for the kernel. 298 */ 299 u_int 300 initarm(int argc, char **argv, struct bootinfo *bi) 301 { 302 u_int kerneldatasize, symbolsize; 303 u_int l1pagetable; 304 vaddr_t freemempos; 305 vsize_t pt_size; 306 int loop, i; 307 #if NKSYMS || defined(DDB) || defined(MODULAR) 308 Elf_Shdr *sh; 309 #endif 310 311 __sleep_func = NULL; 312 __sleep_ctx = NULL; 313 314 /* 315 * Heads up ... Setup the CPU / MMU / TLB functions. 316 */ 317 set_cpufuncs(); 318 IRQdisable; 319 320 #ifdef DEBUG_BEFOREMMU 321 /* 322 * At this point, we cannot call real consinit(). 323 * Just call a faked up version of consinit(), which does the thing 324 * with MMU disabled. 325 */ 326 fakecninit(); 327 #endif 328 329 /* 330 * XXX for now, overwrite bootconfig to hardcoded values. 331 * XXX kill bootconfig and directly call uvm_physload 332 */ 333 bootconfig.dram[0].address = 0xc0000000; 334 bootconfig.dram[0].pages = DRAM_PAGES; 335 bootconfig.dramblocks = 1; 336 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 337 338 symbolsize = 0; 339 #if NKSYMS || defined(DDB) || defined(MODULAR) 340 if (!memcmp(&end, "\177ELF", 4)) { 341 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 342 loop = ((Elf_Ehdr *)&end)->e_shnum; 343 for (; loop; loop--, sh++) 344 if (sh->sh_offset > 0 && 345 (sh->sh_offset + sh->sh_size) > symbolsize) 346 symbolsize = sh->sh_offset + sh->sh_size; 347 } 348 #endif 349 350 printf("kernsize=0x%x\n", kerneldatasize); 351 kerneldatasize += symbolsize; 352 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 353 PAGE_SIZE * 8; 354 355 /* parse kernel args */ 356 boothowto = 0; 357 boot_file[0] = '\0'; 358 strncpy(booted_kernel_storage, argv[0], sizeof(booted_kernel_storage)); 359 for (i = 1; i < argc; i++) { 360 char *cp = argv[i]; 361 362 switch (*cp) { 363 case 'b': 364 /* boot device: -b=sd0 etc. */ 365 cp = cp + 2; 366 #ifdef NFS 367 if (strcmp(cp, MOUNT_NFS) == 0) 368 rootfstype = MOUNT_NFS; 369 else 370 strncpy(boot_file, cp, sizeof(boot_file)); 371 #else /* !NFS */ 372 strncpy(boot_file, cp, sizeof(boot_file)); 373 #endif /* !NFS */ 374 break; 375 default: 376 BOOT_FLAG(*cp, boothowto); 377 break; 378 } 379 } 380 381 /* copy bootinfo into known kernel space */ 382 bootinfo_storage = *bi; 383 bootinfo = &bootinfo_storage; 384 385 #ifdef BOOTINFO_FB_WIDTH 386 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 387 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 388 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 389 bootinfo->fb_type = BOOTINFO_FB_TYPE; 390 #endif 391 392 /* 393 * hpcboot has loaded me with MMU disabled. 394 * So create kernel page tables and enable MMU. 395 */ 396 397 /* 398 * Set up the variables that define the availability of physcial 399 * memory. 400 */ 401 physical_start = bootconfig.dram[0].address; 402 physical_freestart = physical_start 403 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 404 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 405 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 406 physical_freeend = physical_end; 407 408 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 409 physmem += bootconfig.dram[loop].pages; 410 411 /* XXX handle UMA framebuffer memory */ 412 413 /* Use the first 256kB to allocate things */ 414 freemempos = KERNEL_BASE; 415 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 416 417 /* 418 * Right. We have the bottom meg of memory mapped to 0x00000000 419 * so was can get at it. The kernel will occupy the start of it. 420 * After the kernel/args we allocate some of the fixed page tables 421 * we need to get the system going. 422 * We allocate one page directory and NUM_KERNEL_PTS page tables 423 * and store the physical addresses in the kernel_pt_table array. 424 * Must remember that neither the page L1 or L2 page tables are the 425 * same size as a page ! 426 * 427 * Ok, the next bit of physical allocate may look complex but it is 428 * simple really. I have done it like this so that no memory gets 429 * wasted during the allocate of various pages and tables that are 430 * all different sizes. 431 * The start address will be page aligned. 432 * We allocate the kernel page directory on the first free 16KB 433 * boundary we find. 434 * We allocate the kernel page tables on the first 1KB boundary we 435 * find. We allocate at least 9 PT's (12 currently). This means 436 * that in the process we KNOW that we will encounter at least one 437 * 16KB boundary. 438 * 439 * Eventually if the top end of the memory gets used for process L1 440 * page tables the kernel L1 page table may be moved up there. 441 */ 442 443 #ifdef VERBOSE_INIT_ARM 444 printf("Allocating page tables\n"); 445 #endif 446 447 /* Define a macro to simplify memory allocation */ 448 #define valloc_pages(var, np) \ 449 (var).pv_pa = (var).pv_va = freemempos; \ 450 freemempos += (np) * PAGE_SIZE; 451 #define alloc_pages(var, np) \ 452 (var) = freemempos; \ 453 freemempos += (np) * PAGE_SIZE; 454 455 456 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 457 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 458 alloc_pages(kernel_pt_table[loop].pv_pa, 459 L2_TABLE_SIZE / PAGE_SIZE); 460 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 461 } 462 463 /* 464 * Allocate a page for the system page mapped to V0x00000000 465 * This page will just contain the system vectors and can be 466 * shared by all processes. 467 */ 468 valloc_pages(systempage, 1); 469 470 pt_size = round_page(freemempos) - KERNEL_BASE; 471 472 /* Allocate stacks for all modes */ 473 valloc_pages(irqstack, IRQ_STACK_SIZE); 474 valloc_pages(abtstack, ABT_STACK_SIZE); 475 valloc_pages(undstack, UND_STACK_SIZE); 476 valloc_pages(kernelstack, UPAGES); 477 478 #ifdef VERBOSE_INIT_ARM 479 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 480 irqstack.pv_va); 481 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 482 abtstack.pv_va); 483 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 484 undstack.pv_va); 485 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 486 kernelstack.pv_va); 487 #endif 488 489 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 490 491 /* 492 * XXX Actually, we only need virtual space and don't need 493 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 494 */ 495 /* 496 * XXX totally stuffed hack to work round problems introduced 497 * in recent versions of the pmap code. Due to the calls used there 498 * we cannot allocate virtual memory during bootstrap. 499 */ 500 for (;;) { 501 alloc_pages(sa1_cc_base, 1); 502 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 503 break; 504 } 505 { 506 vaddr_t dummy; 507 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 508 } 509 sa1_cache_clean_addr = sa1_cc_base; 510 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 511 512 alloc_pages(sa11x0_idle_mem, 1); 513 514 /* 515 * Ok, we have allocated physical pages for the primary kernel 516 * page tables. 517 */ 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("Creating L1 page table\n"); 521 #endif 522 523 /* 524 * Now we start construction of the L1 page table. 525 * We start by mapping the L2 page tables into the L1. 526 * This means that we can replace L1 mappings later on if necessary. 527 */ 528 l1pagetable = kernel_l1pt.pv_pa; 529 530 /* Map the L2 pages tables in the L1 page table */ 531 pmap_link_l2pt(l1pagetable, 0x00000000, 532 &kernel_pt_table[KERNEL_PT_SYS]); 533 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 534 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 535 &kernel_pt_table[KERNEL_PT_IO]); 536 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 537 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 538 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 539 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 540 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 541 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 542 543 /* update the top of the kernel VM */ 544 pmap_curmaxkvaddr = 545 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("Mapping kernel\n"); 549 #endif 550 551 /* Now we fill in the L2 pagetable for the kernel code/data */ 552 553 /* 554 * XXX there is no ELF header to find RO region. 555 * XXX What should we do? 556 */ 557 #if 0 558 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 559 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 560 physical_start, kernexec->a_text, 561 VM_PROT_READ, PTE_CACHE); 562 logical += pmap_map_chunk(l1pagetable, 563 KERNEL_TEXT_BASE + logical, physical_start + logical, 564 kerneldatasize - kernexec->a_text, 565 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 } else 567 #endif 568 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 569 KERNEL_TEXT_BASE, kerneldatasize, 570 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("Constructing L2 page tables\n"); 574 #endif 575 576 /* Map the stack pages */ 577 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 578 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 579 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 580 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 581 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 582 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 583 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 584 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 586 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 587 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 588 589 /* Map page tables */ 590 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 591 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 592 593 /* Map a page for entering idle mode */ 594 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 595 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 596 597 /* Map the vector page. */ 598 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 599 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 601 /* Map the statically mapped devices. */ 602 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 603 604 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 605 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 606 /* 607 * Now we have the real page tables in place so we can switch to them. 608 * Once this is done we will be running with the REAL kernel page 609 * tables. 610 */ 611 612 printf("done.\n"); 613 614 /* 615 * Pages were allocated during the secondary bootstrap for the 616 * stacks for different CPU modes. 617 * We must now set the r13 registers in the different CPU modes to 618 * point to these stacks. 619 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 620 * of the stack memory. 621 */ 622 printf("init subsystems: stacks "); 623 624 set_stackptr(PSR_IRQ32_MODE, 625 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 626 set_stackptr(PSR_ABT32_MODE, 627 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 628 set_stackptr(PSR_UND32_MODE, 629 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 630 #ifdef PMAP_DEBUG 631 if (pmap_debug_level >= 0) 632 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 633 kernelstack.pv_pa); 634 #endif /* PMAP_DEBUG */ 635 636 /* 637 * Well we should set a data abort handler. 638 * Once things get going this will change as we will need a proper 639 * handler. Until then we will use a handler that just panics but 640 * tells us why. 641 * Initialization of the vectors will just panic on a data abort. 642 * This just fills in a slightly better one. 643 */ 644 printf("vectors "); 645 data_abort_handler_address = (u_int)data_abort_handler; 646 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 647 undefined_handler_address = (u_int)undefinedinstruction_bounce; 648 printf("%08x %08x %08x\n", data_abort_handler_address, 649 prefetch_abort_handler_address, undefined_handler_address); 650 651 /* Initialize the undefined instruction handlers */ 652 printf("undefined "); 653 undefined_init(); 654 655 /* Set the page table address. */ 656 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 657 setttb(kernel_l1pt.pv_pa); 658 cpu_tlb_flushID(); 659 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 660 661 /* 662 * Moved from cpu_startup() as data_abort_handler() references 663 * this during uvm init. 664 */ 665 proc0paddr = (struct user *)kernelstack.pv_va; 666 lwp0.l_addr = proc0paddr; 667 668 #ifdef BOOT_DUMP 669 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 670 dumppages((char *)0xb0100000, 64); /* XXX */ 671 #endif 672 /* Enable MMU, I-cache, D-cache, write buffer. */ 673 cpufunc_control(0x337f, 0x107d); 674 675 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 676 677 consinit(); 678 679 #ifdef VERBOSE_INIT_ARM 680 printf("freemempos=%08lx\n", freemempos); 681 printf("MMU enabled. control=%08x\n", cpu_get_control()); 682 #endif 683 684 /* Load memory into UVM. */ 685 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 686 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 687 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 688 paddr_t dblk_end = dblk_start 689 + (bootconfig.dram[loop].pages * PAGE_SIZE); 690 691 if (dblk_start < physical_freestart) 692 dblk_start = physical_freestart; 693 if (dblk_end > physical_freeend) 694 dblk_end = physical_freeend; 695 696 uvm_page_physload(atop(dblk_start), atop(dblk_end), 697 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 698 } 699 700 /* Boot strap pmap telling it where the kernel page table is */ 701 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 702 703 #ifdef BOOT_DUMP 704 dumppages((char *)kernel_l1pt.pv_va, 16); 705 #endif 706 707 #ifdef DDB 708 db_machine_init(); 709 #endif 710 #if NKSYMS || defined(DDB) || defined(MODULAR) 711 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 712 #endif 713 714 printf("kernsize=0x%x", kerneldatasize); 715 printf(" (including 0x%x symbols)\n", symbolsize); 716 717 #ifdef DDB 718 if (boothowto & RB_KDB) 719 Debugger(); 720 #endif /* DDB */ 721 722 if (bootinfo->magic == BOOTINFO_MAGIC) { 723 platid.dw.dw0 = bootinfo->platid_cpu; 724 platid.dw.dw1 = bootinfo->platid_machine; 725 } 726 727 /* We return the new stack pointer address */ 728 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 729 } 730 731 void 732 machine_sleep(void) 733 { 734 735 if (__sleep_func != NULL) 736 __sleep_func(__sleep_ctx); 737 } 738 739 void 740 machine_standby(void) 741 { 742 743 } 744 745 void 746 consinit(void) 747 { 748 static int consinit_called = 0; 749 750 if (consinit_called != 0) 751 return; 752 753 consinit_called = 1; 754 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 755 cninit(); 756 else { 757 /* 758 * Nothing to do here. Console initialization is done at 759 * autoconf device attach time. 760 */ 761 } 762 } 763 764 #ifdef DEBUG_BEFOREMMU 765 cons_decl(sacom); 766 767 static void 768 fakecninit(void) 769 { 770 static struct consdev fakecntab = cons_init(sacom); 771 cn_tab = &fakecntab; 772 773 (*cn_tab->cn_init)(0); 774 cn_tab->cn_pri = CN_REMOTE; 775 } 776 #endif 777 778 #ifdef BOOT_DUMP 779 static void 780 dumppages(char *start, int nbytes) 781 { 782 char *p = start; 783 char *p1; 784 int i; 785 786 for (i = nbytes; i > 0; i -= 16, p += 16) { 787 for (p1 = p + 15; p != p1; p1--) { 788 if (*p1) 789 break; 790 } 791 if (!*p1) 792 continue; 793 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 794 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 795 (unsigned int)p, 796 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 797 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 798 } 799 } 800 #endif 801