1 /* $OpenBSD: armv7_machdep.c,v 1.42 2016/10/05 07:44:24 patrick Exp $ */ 2 /* $NetBSD: lubbock_machdep.c,v 1.2 2003/07/15 00:25:06 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 2002, 2003 Genetec Corporation. All rights reserved. 6 * Written by Hiroyuki Bessho for Genetec Corporation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of Genetec Corporation may not be used to endorse or 17 * promote products derived from this software without specific prior 18 * written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 * 32 * Machine dependant functions for kernel setup for 33 * Intel DBPXA250 evaluation board (a.k.a. Lubbock). 34 * Based on iq80310_machhdep.c 35 */ 36 /* 37 * Copyright (c) 2001 Wasabi Systems, Inc. 38 * All rights reserved. 39 * 40 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed for the NetBSD Project by 53 * Wasabi Systems, Inc. 54 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 55 * or promote products derived from this software without specific prior 56 * written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 60 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 61 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 62 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 63 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 64 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 65 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 66 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 67 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 68 * POSSIBILITY OF SUCH DAMAGE. 69 */ 70 71 /* 72 * Copyright (c) 1997,1998 Mark Brinicombe. 73 * Copyright (c) 1997,1998 Causality Limited. 74 * All rights reserved. 75 * 76 * Redistribution and use in source and binary forms, with or without 77 * modification, are permitted provided that the following conditions 78 * are met: 79 * 1. Redistributions of source code must retain the above copyright 80 * notice, this list of conditions and the following disclaimer. 81 * 2. Redistributions in binary form must reproduce the above copyright 82 * notice, this list of conditions and the following disclaimer in the 83 * documentation and/or other materials provided with the distribution. 84 * 3. All advertising materials mentioning features or use of this software 85 * must display the following acknowledgement: 86 * This product includes software developed by Mark Brinicombe 87 * for the NetBSD Project. 88 * 4. The name of the company nor the name of the author may be used to 89 * endorse or promote products derived from this software without specific 90 * prior written permission. 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 93 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 94 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 95 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 96 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 97 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 98 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 99 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 100 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 101 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 102 * SUCH DAMAGE. 103 * 104 * Machine dependant functions for kernel setup for ARMv7 boards using 105 * u-boot/EFI firmware. 106 */ 107 108 #include <sys/param.h> 109 #include <sys/systm.h> 110 #include <sys/proc.h> 111 #include <sys/reboot.h> 112 #include <sys/termios.h> 113 #include <sys/socket.h> 114 115 #include <machine/db_machdep.h> 116 #include <machine/bootconfig.h> 117 #include <machine/machine_reg.h> 118 #include <machine/bus.h> 119 120 #include <arm/undefined.h> 121 #include <arm/machdep.h> 122 #include <arm/armv7/armv7var.h> 123 #include <armv7/armv7/armv7_machdep.h> 124 125 #include <dev/cons.h> 126 #include <dev/ofw/fdt.h> 127 #include <dev/ofw/openfirm.h> 128 129 #include <net/if.h> 130 131 #include <ddb/db_extern.h> 132 133 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 134 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 135 #define KERNEL_VM_BASE (KERNEL_BASE + 0x04000000) 136 #define KERNEL_VM_SIZE VM_KERNEL_SPACE_SIZE 137 138 /* 139 * Address to call from cpu_reset() to reset the machine. 140 * This is machine architecture dependant as it varies depending 141 * on where the ROM appears when you turn the MMU off. 142 */ 143 144 /* Define various stack sizes in pages */ 145 #define IRQ_STACK_SIZE 1 146 #define ABT_STACK_SIZE 1 147 #define UND_STACK_SIZE 1 148 149 BootConfig bootconfig; /* Boot config storage */ 150 char *boot_args = NULL; 151 char *boot_file = ""; 152 u_int cpu_reset_address = 0; 153 154 vaddr_t physical_start; 155 vaddr_t physical_freestart; 156 vaddr_t physical_freeend; 157 vaddr_t physical_end; 158 u_int free_pages; 159 int physmem = 0; 160 161 /*int debug_flags;*/ 162 #ifndef PMAP_STATIC_L1S 163 int max_processes = 64; /* Default number */ 164 #endif /* !PMAP_STATIC_L1S */ 165 166 /* Physical and virtual addresses for some global pages */ 167 pv_addr_t systempage; 168 pv_addr_t irqstack; 169 pv_addr_t undstack; 170 pv_addr_t abtstack; 171 extern pv_addr_t kernelstack; 172 173 vaddr_t msgbufphys; 174 175 extern u_int data_abort_handler_address; 176 extern u_int prefetch_abort_handler_address; 177 extern u_int undefined_handler_address; 178 179 uint32_t board_id; 180 181 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 182 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 183 #define KERNEL_PT_KERNEL_NUM 32 184 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 185 /* Page tables for mapping kernel VM */ 186 #define KERNEL_PT_VMDATA_NUM 8 /* start with 16MB of KVM */ 187 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 188 189 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 190 191 extern struct user *proc0paddr; 192 193 /* 194 * safepri is a safe priority for sleep to set for a spin-wait 195 * during autoconfiguration or after a panic. 196 */ 197 int safepri = 0; 198 199 /* Prototypes */ 200 201 char bootargs[MAX_BOOT_STRING]; 202 int bootstrap_bs_map(void *, uint64_t, bus_size_t, int, 203 bus_space_handle_t *); 204 void process_kernel_args(char *); 205 void consinit(void); 206 207 bs_protos(bs_notimpl); 208 209 #ifndef CONSPEED 210 #define CONSPEED B115200 /* What u-boot */ 211 #endif 212 #ifndef CONMODE 213 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 214 #endif 215 216 int comcnspeed = CONSPEED; 217 int comcnmode = CONMODE; 218 219 int stdout_node = 0; 220 221 void (*cpuresetfn)(void); 222 223 /* 224 * void boot(int howto, char *bootstr) 225 * 226 * Reboots the system 227 * 228 * Deal with any syncing, unmounting, dumping and shutdown hooks, 229 * then reset the CPU. 230 */ 231 __dead void 232 boot(int howto) 233 { 234 #ifdef DIAGNOSTIC 235 /* info */ 236 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 237 #endif 238 239 if (cold) { 240 config_suspend_all(DVACT_POWERDOWN); 241 if ((howto & (RB_HALT | RB_USERREQ)) != RB_USERREQ) { 242 printf("The operating system has halted.\n"); 243 printf("Please press any key to reboot.\n\n"); 244 cngetc(); 245 } 246 printf("rebooting...\n"); 247 delay(500000); 248 if (cpuresetfn) 249 (*cpuresetfn)(); 250 printf("reboot failed; spinning\n"); 251 while(1); 252 /*NOTREACHED*/ 253 } 254 255 /* Disable console buffering */ 256 /* cnpollc(1);*/ 257 258 /* 259 * If RB_NOSYNC was not specified sync the discs. 260 * Note: Unless cold is set to 1 here, syslogd will die during the 261 * unmount. It looks like syslogd is getting woken up only to find 262 * that it cannot page part of the binary in as the filesystem has 263 * been unmounted. 264 */ 265 if ((howto & RB_NOSYNC) == 0) 266 bootsync(howto); 267 268 if_downall(); 269 270 uvm_shutdown(); 271 splhigh(); 272 cold = 1; 273 274 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 275 dumpsys(); 276 277 config_suspend_all(DVACT_POWERDOWN); 278 279 /* Make sure IRQ's are disabled */ 280 IRQdisable; 281 282 if ((howto & RB_HALT) != 0) { 283 if ((howto & RB_POWERDOWN) != 0) { 284 printf("\nAttempting to power down...\n"); 285 delay(500000); 286 platform_powerdown(); 287 } 288 289 printf("The operating system has halted.\n"); 290 printf("Please press any key to reboot.\n\n"); 291 cngetc(); 292 } 293 294 printf("rebooting...\n"); 295 delay(500000); 296 if (cpuresetfn) 297 (*cpuresetfn)(); 298 printf("reboot failed; spinning\n"); 299 for (;;) ; 300 /* NOTREACHED */ 301 } 302 303 static __inline 304 pd_entry_t * 305 read_ttb(void) 306 { 307 long ttb; 308 309 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 310 311 312 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 313 } 314 315 #define VERBOSE_INIT_ARM 316 317 /* 318 * simple memory mapping function used in early bootstrap stage 319 * before pmap is initialized. 320 * ignores cacheability and does map the sections with nocache. 321 */ 322 static vaddr_t section_free = 0xfd000000; /* XXX - huh */ 323 324 int 325 bootstrap_bs_map(void *t, uint64_t bpa, bus_size_t size, 326 int flags, bus_space_handle_t *bshp) 327 { 328 u_long startpa, pa, endpa; 329 vaddr_t va; 330 pd_entry_t *pagedir = read_ttb(); 331 /* This assumes PA==VA for page directory */ 332 333 va = section_free; 334 335 startpa = bpa & ~L1_S_OFFSET; 336 endpa = (bpa + size) & ~L1_S_OFFSET; 337 if ((bpa + size) & L1_S_OFFSET) 338 endpa += L1_S_SIZE; 339 340 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 341 342 for (pa = startpa; pa < endpa; pa += L1_S_SIZE, va += L1_S_SIZE) 343 pmap_map_section((vaddr_t)pagedir, va, pa, 344 PROT_READ | PROT_WRITE, PTE_NOCACHE); 345 346 cpu_tlb_flushD(); 347 348 section_free = va; 349 350 return 0; 351 } 352 353 static void 354 copy_io_area_map(pd_entry_t *new_pd) 355 { 356 pd_entry_t *cur_pd = read_ttb(); 357 vaddr_t va; 358 359 for (va = MACHINE_IO_AREA_VBASE; 360 (cur_pd[va>>L1_S_SHIFT] & L1_TYPE_MASK) == L1_TYPE_S; 361 va += L1_S_SIZE) { 362 363 new_pd[va>>L1_S_SHIFT] = cur_pd[va>>L1_S_SHIFT]; 364 if (va == (ARM_VECTORS_HIGH & ~(0x00400000 - 1))) 365 break; /* STUPID */ 366 367 } 368 } 369 370 /* 371 * u_int initarm(...) 372 * 373 * Initial entry point on startup. This gets called before main() is 374 * entered. 375 * It should be responsible for setting up everything that must be 376 * in place when main is called. 377 * This includes 378 * Taking a copy of the FDT. 379 * Initialising the physical console so characters can be printed. 380 * Setting up page tables for the kernel. 381 */ 382 u_int 383 initarm(void *arg0, void *arg1, void *arg2, paddr_t loadaddr) 384 { 385 int loop, loop1, i, physsegs = VM_PHYSSEG_MAX; 386 u_int l1pagetable; 387 pv_addr_t kernel_l1pt; 388 pv_addr_t fdt; 389 struct fdt_reg reg; 390 paddr_t memstart; 391 psize_t memsize; 392 paddr_t memend; 393 void *config; 394 size_t size; 395 void *node; 396 extern uint32_t esym; /* &_end if no symbols are loaded */ 397 398 /* early bus_space_map support */ 399 struct bus_space tmp_bs_tag; 400 int (*map_func_save)(void *, uint64_t, bus_size_t, int, 401 bus_space_handle_t *); 402 403 if (arg0) 404 esym = (uint32_t)arg0; 405 406 board_id = (uint32_t)arg1; 407 /* 408 * u-boot has decided the top four bits are 409 * 'compatibility revision' for sunxi 410 */ 411 if (board_id != 0xffffffff) 412 board_id &= 0x0fffffff; 413 414 /* 415 * Heads up ... Setup the CPU / MMU / TLB functions 416 */ 417 if (set_cpufuncs()) 418 panic("cpu not recognized!"); 419 420 /* 421 * Temporarily replace bus_space_map() functions so that 422 * console devices can get mapped. 423 * 424 * Note that this relies upon the fact that both regular 425 * and a4x bus_space tags use the same map function. 426 */ 427 tmp_bs_tag = armv7_bs_tag; 428 map_func_save = armv7_bs_tag.bs_map; 429 armv7_bs_tag.bs_map = bootstrap_bs_map; 430 armv7_a4x_bs_tag.bs_map = bootstrap_bs_map; 431 tmp_bs_tag.bs_map = bootstrap_bs_map; 432 433 /* 434 * Now, map the FDT area. 435 * 436 * As we don't know the size of a possible FDT, map the size of a 437 * typical bootstrap bs map. The FDT might not be aligned, so this 438 * might take up to two L1_S_SIZEd mappings. 439 * 440 * XXX: There's (currently) no way to unmap a bootstrap mapping, so 441 * we might lose a bit of the bootstrap address space. 442 */ 443 bootstrap_bs_map(NULL, (bus_addr_t)arg2, L1_S_SIZE, 0, 444 (bus_space_handle_t *)&config); 445 446 if (!fdt_init(config) || fdt_get_size(config) == 0) 447 panic("initarm: no FDT"); 448 449 node = fdt_find_node("/chosen"); 450 if (node != NULL) { 451 char *args, *duid; 452 int len; 453 454 len = fdt_node_property(node, "bootargs", &args); 455 if (len > 0) 456 process_kernel_args(args); 457 458 len = fdt_node_property(node, "openbsd,bootduid", &duid); 459 if (len == sizeof(bootduid)) 460 memcpy(bootduid, duid, sizeof(bootduid)); 461 } 462 463 node = fdt_find_node("/memory"); 464 if (node == NULL || fdt_get_reg(node, 0, ®)) 465 panic("initarm: no memory specificed"); 466 467 memstart = reg.addr; 468 memsize = reg.size; 469 physical_start = reg.addr; 470 physical_end = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 471 472 platform_init(); 473 platform_disable_l2_if_needed(); 474 475 /* setup a serial console for very early boot */ 476 consinit(); 477 478 /* Talk to the user */ 479 printf("\nOpenBSD/armv7 booting ...\n"); 480 481 printf("arg0 %p arg1 %p arg2 %p\n", arg0, arg1, arg2); 482 483 #ifdef RAMDISK_HOOKS 484 boothowto |= RB_DFLTROOT; 485 #endif /* RAMDISK_HOOKS */ 486 487 physical_freestart = (((unsigned long)esym - KERNEL_TEXT_BASE + 0xfff) & ~0xfff) + loadaddr; 488 physical_freeend = MIN((uint64_t)physical_end, (paddr_t)-PAGE_SIZE); 489 490 physmem = (physical_end - physical_start) / PAGE_SIZE; 491 492 #ifdef DEBUG 493 /* Tell the user about the memory */ 494 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 495 physical_start, physical_end - 1); 496 #endif 497 498 /* 499 * Okay, the kernel starts 2MB in from the bottom of physical 500 * memory. We are going to allocate our bootstrap pages downwards 501 * from there. 502 * 503 * We need to allocate some fixed page tables to get the kernel 504 * going. We allocate one page directory and a number of page 505 * tables and store the physical addresses in the kernel_pt_table 506 * array. 507 * 508 * The kernel page directory must be on a 16K boundary. The page 509 * tables must be on 4K bounaries. What we do is allocate the 510 * page directory on the first 16K boundary that we encounter, and 511 * the page tables on 4K boundaries otherwise. Since we allocate 512 * at least 3 L2 page tables, we are guaranteed to encounter at 513 * least one 16K aligned region. 514 */ 515 516 #ifdef VERBOSE_INIT_ARM 517 printf("Allocating page tables\n"); 518 #endif 519 520 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 521 522 #ifdef VERBOSE_INIT_ARM 523 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 524 physical_freestart, free_pages, free_pages); 525 #endif 526 527 /* Define a macro to simplify memory allocation */ 528 #define valloc_pages(var, np) \ 529 alloc_pages((var).pv_pa, (np)); \ 530 (var).pv_va = KERNEL_BASE + (var).pv_pa - loadaddr; 531 532 #define alloc_pages(var, np) \ 533 (var) = physical_freestart; \ 534 physical_freestart += ((np) * PAGE_SIZE); \ 535 if (physical_freeend < physical_freestart) \ 536 panic("initarm: out of memory"); \ 537 free_pages -= (np); \ 538 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 539 540 loop1 = 0; 541 kernel_l1pt.pv_pa = 0; 542 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 543 /* Are we 16KB aligned for an L1 ? */ 544 if (((physical_freestart) & (L1_TABLE_SIZE - 1)) == 0 545 && kernel_l1pt.pv_pa == 0) { 546 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 547 } else { 548 valloc_pages(kernel_pt_table[loop1], 549 L2_TABLE_SIZE / PAGE_SIZE); 550 ++loop1; 551 } 552 } 553 554 /* This should never be able to happen but better confirm that. */ 555 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 556 panic("initarm: Failed to align the kernel page directory"); 557 558 /* 559 * Allocate a page for the system page mapped to V0x00000000 560 * This page will just contain the system vectors and can be 561 * shared by all processes. 562 */ 563 vector_page = ARM_VECTORS_HIGH; 564 alloc_pages(systempage.pv_pa, 1); 565 systempage.pv_va = vector_page; 566 567 /* Allocate stacks for all modes */ 568 valloc_pages(irqstack, IRQ_STACK_SIZE); 569 valloc_pages(abtstack, ABT_STACK_SIZE); 570 valloc_pages(undstack, UND_STACK_SIZE); 571 valloc_pages(kernelstack, UPAGES); 572 573 /* Allocate enough pages for cleaning the Mini-Data cache. */ 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 577 irqstack.pv_va); 578 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 579 abtstack.pv_va); 580 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 581 undstack.pv_va); 582 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 583 kernelstack.pv_va); 584 #endif 585 586 /* 587 * Allocate pages for an FDT copy. 588 */ 589 size = fdt_get_size(config); 590 valloc_pages(fdt, round_page(size) / PAGE_SIZE); 591 memcpy((void *)fdt.pv_pa, config, size); 592 593 /* 594 * XXX Defer this to later so that we can reclaim the memory 595 */ 596 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 597 598 /* 599 * Ok we have allocated physical pages for the primary kernel 600 * page tables 601 */ 602 603 #ifdef VERBOSE_INIT_ARM 604 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 605 #endif 606 607 /* 608 * Now we start construction of the L1 page table 609 * We start by mapping the L2 page tables into the L1. 610 * This means that we can replace L1 mappings later on if necessary 611 */ 612 l1pagetable = kernel_l1pt.pv_pa; 613 614 /* Map the L2 pages tables in the L1 page table */ 615 pmap_link_l2pt(l1pagetable, vector_page & ~(0x00400000 - 1), 616 &kernel_pt_table[KERNEL_PT_SYS]); 617 618 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 619 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 620 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 621 622 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 623 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 624 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 625 626 /* update the top of the kernel VM */ 627 pmap_curmaxkvaddr = 628 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Mapping kernel\n"); 632 #endif 633 634 /* Now we fill in the L2 pagetable for the kernel static code/data */ 635 { 636 extern char etext[]; 637 size_t textsize = (u_int32_t) etext - KERNEL_TEXT_BASE; 638 size_t totalsize = (u_int32_t) esym - KERNEL_TEXT_BASE; 639 u_int logical; 640 641 textsize = (textsize + PGOFSET) & ~PGOFSET; 642 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 643 644 logical = 0x00000000; /* offset of kernel in RAM */ 645 646 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 647 loadaddr + logical, textsize, 648 PROT_READ | PROT_EXEC, PTE_CACHE); 649 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 650 loadaddr + logical, totalsize - textsize, 651 PROT_READ | PROT_WRITE, PTE_CACHE); 652 } 653 654 #ifdef VERBOSE_INIT_ARM 655 printf("Constructing L2 page tables\n"); 656 #endif 657 658 /* Map the stack pages */ 659 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 660 IRQ_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 661 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 662 ABT_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 663 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 664 UND_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 665 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 666 UPAGES * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 667 668 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 669 L1_TABLE_SIZE, PROT_READ | PROT_WRITE, PTE_PAGETABLE); 670 671 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 672 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 673 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 674 PROT_READ | PROT_WRITE, PTE_PAGETABLE); 675 } 676 677 /* Map the Mini-Data cache clean area. */ 678 679 /* Map the vector page. */ 680 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 681 PROT_READ | PROT_WRITE, PTE_CACHE); 682 683 /* Map the FDT. */ 684 pmap_map_chunk(l1pagetable, fdt.pv_va, fdt.pv_pa, 685 round_page(fdt_get_size((void *)fdt.pv_pa)), 686 PROT_READ | PROT_WRITE, PTE_CACHE); 687 688 /* 689 * map integrated peripherals at same address in l1pagetable 690 * so that we can continue to use console. 691 */ 692 copy_io_area_map((pd_entry_t *)l1pagetable); 693 694 /* 695 * Now we have the real page tables in place so we can switch to them. 696 * Once this is done we will be running with the REAL kernel page 697 * tables. 698 */ 699 setttb(kernel_l1pt.pv_pa); 700 cpu_tlb_flushID(); 701 702 /* 703 * Moved from cpu_startup() as data_abort_handler() references 704 * this during uvm init 705 */ 706 proc0paddr = (struct user *)kernelstack.pv_va; 707 proc0.p_addr = proc0paddr; 708 709 arm32_vector_init(vector_page, ARM_VEC_ALL); 710 711 /* 712 * Pages were allocated during the secondary bootstrap for the 713 * stacks for different CPU modes. 714 * We must now set the r13 registers in the different CPU modes to 715 * point to these stacks. 716 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 717 * of the stack memory. 718 */ 719 720 set_stackptr(PSR_IRQ32_MODE, 721 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 722 set_stackptr(PSR_ABT32_MODE, 723 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 724 set_stackptr(PSR_UND32_MODE, 725 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 726 727 /* 728 * Well we should set a data abort handler. 729 * Once things get going this will change as we will need a proper 730 * handler. 731 * Until then we will use a handler that just panics but tells us 732 * why. 733 * Initialisation of the vectors will just panic on a data abort. 734 * This just fills in a slighly better one. 735 */ 736 737 data_abort_handler_address = (u_int)data_abort_handler; 738 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 739 undefined_handler_address = (u_int)undefinedinstruction_bounce; 740 741 /* Now we can reinit the FDT, using the virtual address. */ 742 fdt_init((void *)fdt.pv_va); 743 744 /* Initialise the undefined instruction handlers */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("undefined "); 747 #endif 748 undefined_init(); 749 750 /* Load memory into UVM. */ 751 #ifdef VERBOSE_INIT_ARM 752 printf("page "); 753 #endif 754 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 755 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 756 atop(physical_freestart), atop(physical_freeend), 0); 757 758 if (physical_start < loadaddr) { 759 uvm_page_physload(atop(physical_start), atop(loadaddr), 760 atop(physical_start), atop(loadaddr), 0); 761 physsegs--; 762 } 763 764 for (i = 1; i < physsegs; i++) { 765 if (fdt_get_reg(node, i, ®)) 766 break; 767 768 memstart = reg.addr; 769 memend = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 770 physmem += (memend - memstart) / PAGE_SIZE; 771 uvm_page_physload(atop(memstart), atop(memend), 772 atop(memstart), atop(memend), 0); 773 } 774 775 /* Boot strap pmap telling it where the kernel page table is */ 776 #ifdef VERBOSE_INIT_ARM 777 printf("pmap "); 778 #endif 779 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 780 KERNEL_VM_BASE + KERNEL_VM_SIZE); 781 782 vector_page_setprot(PROT_READ | PROT_EXEC); 783 784 /* 785 * Restore proper bus_space operation, now that pmap is initialized. 786 */ 787 armv7_bs_tag.bs_map = map_func_save; 788 armv7_a4x_bs_tag.bs_map = map_func_save; 789 790 #ifdef DDB 791 db_machine_init(); 792 793 /* Firmware doesn't load symbols. */ 794 ddb_init(); 795 796 if (boothowto & RB_KDB) 797 Debugger(); 798 #endif 799 printf("board type: %u\n", board_id); 800 801 cpu_setup(); 802 803 /* We return the new stack pointer address */ 804 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 805 } 806 807 808 void 809 process_kernel_args(char *args) 810 { 811 char *cp = args; 812 813 if (cp == NULL) { 814 boothowto = RB_AUTOBOOT; 815 return; 816 } 817 818 boothowto = 0; 819 820 /* Make a local copy of the bootargs */ 821 strncpy(bootargs, cp, MAX_BOOT_STRING - sizeof(int)); 822 823 cp = bootargs; 824 boot_file = bootargs; 825 826 /* Skip the kernel image filename */ 827 while (*cp != ' ' && *cp != 0) 828 ++cp; 829 830 if (*cp != 0) 831 *cp++ = 0; 832 833 while (*cp == ' ') 834 ++cp; 835 836 boot_args = cp; 837 838 printf("bootfile: %s\n", boot_file); 839 printf("bootargs: %s\n", boot_args); 840 841 /* Setup pointer to boot flags */ 842 while (*cp != '-') 843 if (*cp++ == '\0') 844 return; 845 846 for (;*++cp;) { 847 int fl; 848 849 fl = 0; 850 switch(*cp) { 851 case 'a': 852 fl |= RB_ASKNAME; 853 break; 854 case 'c': 855 fl |= RB_CONFIG; 856 break; 857 case 'd': 858 fl |= RB_KDB; 859 break; 860 case 's': 861 fl |= RB_SINGLE; 862 break; 863 default: 864 printf("unknown option `%c'\n", *cp); 865 break; 866 } 867 boothowto |= fl; 868 } 869 } 870 871 void * 872 fdt_find_cons(const char *name) 873 { 874 char *alias = "serial0"; 875 char buf[128]; 876 char *stdout = NULL; 877 char *p; 878 void *node; 879 880 /* First check if "stdout-path" is set. */ 881 node = fdt_find_node("/chosen"); 882 if (node) { 883 if (fdt_node_property(node, "stdout-path", &stdout) > 0) { 884 if (strchr(stdout, ':') != NULL) { 885 strlcpy(buf, stdout, sizeof(buf)); 886 if ((p = strchr(buf, ':')) != NULL) 887 *p = '\0'; 888 stdout = buf; 889 } 890 if (stdout[0] != '/') { 891 /* It's an alias. */ 892 alias = stdout; 893 stdout = NULL; 894 } 895 } 896 } 897 898 /* Perform alias lookup if necessary. */ 899 if (stdout == NULL) { 900 node = fdt_find_node("/aliases"); 901 if (node) 902 fdt_node_property(node, alias, &stdout); 903 } 904 905 /* Lookup the physical address of the interface. */ 906 if (stdout) { 907 node = fdt_find_node(stdout); 908 if (node && fdt_is_compatible(node, name)) { 909 stdout_node = OF_finddevice(stdout); 910 return (node); 911 } 912 } 913 914 return (NULL); 915 } 916 917 void 918 consinit(void) 919 { 920 static int consinit_called = 0; 921 922 if (consinit_called != 0) 923 return; 924 925 consinit_called = 1; 926 927 platform_init_cons(); 928 } 929 930 void 931 board_startup(void) 932 { 933 if (boothowto & RB_CONFIG) { 934 #ifdef BOOT_CONFIG 935 user_config(); 936 #else 937 printf("kernel does not support -c; continuing..\n"); 938 #endif 939 } 940 } 941