1 /* $OpenBSD: armv7_machdep.c,v 1.49 2017/05/02 21:39:45 kettenis 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 void (*powerdownfn)(void); 223 224 /* 225 * void boot(int howto, char *bootstr) 226 * 227 * Reboots the system 228 * 229 * Deal with any syncing, unmounting, dumping and shutdown hooks, 230 * then reset the CPU. 231 */ 232 __dead void 233 boot(int howto) 234 { 235 if (cold) { 236 if ((howto & RB_USERREQ) == 0) 237 howto |= RB_HALT; 238 goto haltsys; 239 } 240 241 /* Disable console buffering */ 242 /* cnpollc(1);*/ 243 244 /* 245 * If RB_NOSYNC was not specified sync the discs. 246 * Note: Unless cold is set to 1 here, syslogd will die during the 247 * unmount. It looks like syslogd is getting woken up only to find 248 * that it cannot page part of the binary in as the filesystem has 249 * been unmounted. 250 */ 251 if ((howto & RB_NOSYNC) == 0) 252 bootsync(howto); 253 254 if_downall(); 255 256 uvm_shutdown(); 257 splhigh(); 258 cold = 1; 259 260 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 261 dumpsys(); 262 263 haltsys: 264 config_suspend_all(DVACT_POWERDOWN); 265 266 /* Make sure IRQ's are disabled */ 267 IRQdisable; 268 269 if ((howto & RB_HALT) != 0) { 270 if ((howto & RB_POWERDOWN) != 0) { 271 printf("\nAttempting to power down...\n"); 272 delay(500000); 273 if (powerdownfn) 274 (*powerdownfn)(); 275 } 276 277 printf("The operating system has halted.\n"); 278 printf("Please press any key to reboot.\n\n"); 279 cngetc(); 280 } 281 282 printf("rebooting...\n"); 283 delay(500000); 284 if (cpuresetfn) 285 (*cpuresetfn)(); 286 printf("reboot failed; spinning\n"); 287 for (;;) 288 continue; 289 /* NOTREACHED */ 290 } 291 292 static __inline 293 pd_entry_t * 294 read_ttb(void) 295 { 296 long ttb; 297 298 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 299 300 301 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 302 } 303 304 #define VERBOSE_INIT_ARM 305 306 /* 307 * simple memory mapping function used in early bootstrap stage 308 * before pmap is initialized. 309 * ignores cacheability and does map the sections with nocache. 310 */ 311 static vaddr_t section_free = 0xfd000000; /* XXX - huh */ 312 313 int 314 bootstrap_bs_map(void *t, uint64_t bpa, bus_size_t size, 315 int flags, bus_space_handle_t *bshp) 316 { 317 u_long startpa, pa, endpa; 318 vaddr_t va; 319 pd_entry_t *pagedir = read_ttb(); 320 /* This assumes PA==VA for page directory */ 321 322 va = section_free; 323 324 startpa = bpa & ~L1_S_OFFSET; 325 endpa = (bpa + size) & ~L1_S_OFFSET; 326 if ((bpa + size) & L1_S_OFFSET) 327 endpa += L1_S_SIZE; 328 329 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 330 331 for (pa = startpa; pa < endpa; pa += L1_S_SIZE, va += L1_S_SIZE) 332 pmap_map_section((vaddr_t)pagedir, va, pa, 333 PROT_READ | PROT_WRITE, PTE_NOCACHE); 334 335 cpu_tlb_flushD(); 336 337 section_free = va; 338 339 return 0; 340 } 341 342 static void 343 copy_io_area_map(pd_entry_t *new_pd) 344 { 345 pd_entry_t *cur_pd = read_ttb(); 346 vaddr_t va; 347 348 for (va = MACHINE_IO_AREA_VBASE; 349 (cur_pd[va>>L1_S_SHIFT] & L1_TYPE_MASK) == L1_TYPE_S; 350 va += L1_S_SIZE) { 351 352 new_pd[va>>L1_S_SHIFT] = cur_pd[va>>L1_S_SHIFT]; 353 if (va == (ARM_VECTORS_HIGH & ~(0x00400000 - 1))) 354 break; /* STUPID */ 355 356 } 357 } 358 359 /* 360 * u_int initarm(...) 361 * 362 * Initial entry point on startup. This gets called before main() is 363 * entered. 364 * It should be responsible for setting up everything that must be 365 * in place when main is called. 366 * This includes 367 * Taking a copy of the FDT. 368 * Initialising the physical console so characters can be printed. 369 * Setting up page tables for the kernel. 370 */ 371 u_int 372 initarm(void *arg0, void *arg1, void *arg2, paddr_t loadaddr) 373 { 374 int loop, loop1, i, physsegs = VM_PHYSSEG_MAX; 375 u_int l1pagetable; 376 pv_addr_t kernel_l1pt; 377 pv_addr_t fdt; 378 struct fdt_reg reg; 379 paddr_t memstart; 380 psize_t memsize; 381 paddr_t memend; 382 void *config; 383 size_t size; 384 void *node; 385 extern uint32_t esym; /* &_end if no symbols are loaded */ 386 387 /* early bus_space_map support */ 388 struct bus_space tmp_bs_tag; 389 int (*map_func_save)(void *, uint64_t, bus_size_t, int, 390 bus_space_handle_t *); 391 392 if (arg0) 393 esym = (uint32_t)arg0; 394 395 board_id = (uint32_t)arg1; 396 /* 397 * u-boot has decided the top four bits are 398 * 'compatibility revision' for sunxi 399 */ 400 if (board_id != 0xffffffff) 401 board_id &= 0x0fffffff; 402 403 /* 404 * Heads up ... Setup the CPU / MMU / TLB functions 405 */ 406 if (set_cpufuncs()) 407 panic("cpu not recognized!"); 408 409 /* 410 * Temporarily replace bus_space_map() functions so that 411 * console devices can get mapped. 412 * 413 * Note that this relies upon the fact that both regular 414 * and a4x bus_space tags use the same map function. 415 */ 416 tmp_bs_tag = armv7_bs_tag; 417 map_func_save = armv7_bs_tag.bs_map; 418 armv7_bs_tag.bs_map = bootstrap_bs_map; 419 armv7_a4x_bs_tag.bs_map = bootstrap_bs_map; 420 tmp_bs_tag.bs_map = bootstrap_bs_map; 421 422 /* 423 * Now, map the FDT area. 424 * 425 * As we don't know the size of a possible FDT, map the size of a 426 * typical bootstrap bs map. The FDT might not be aligned, so this 427 * might take up to two L1_S_SIZEd mappings. 428 * 429 * XXX: There's (currently) no way to unmap a bootstrap mapping, so 430 * we might lose a bit of the bootstrap address space. 431 */ 432 bootstrap_bs_map(NULL, (bus_addr_t)arg2, L1_S_SIZE, 0, 433 (bus_space_handle_t *)&config); 434 435 if (!fdt_init(config) || fdt_get_size(config) == 0) 436 panic("initarm: no FDT"); 437 438 node = fdt_find_node("/chosen"); 439 if (node != NULL) { 440 char *args, *duid; 441 int len; 442 443 len = fdt_node_property(node, "bootargs", &args); 444 if (len > 0) 445 process_kernel_args(args); 446 447 len = fdt_node_property(node, "openbsd,bootduid", &duid); 448 if (len == sizeof(bootduid)) 449 memcpy(bootduid, duid, sizeof(bootduid)); 450 } 451 452 node = fdt_find_node("/memory"); 453 if (node == NULL || fdt_get_reg(node, 0, ®)) 454 panic("initarm: no memory specificed"); 455 456 memstart = reg.addr; 457 memsize = reg.size; 458 physical_start = reg.addr; 459 physical_end = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 460 461 platform_init(); 462 463 /* setup a serial console for very early boot */ 464 consinit(); 465 466 /* Talk to the user */ 467 printf("\nOpenBSD/armv7 booting ...\n"); 468 469 printf("arg0 %p arg1 %p arg2 %p\n", arg0, arg1, arg2); 470 471 #ifdef RAMDISK_HOOKS 472 boothowto |= RB_DFLTROOT; 473 #endif /* RAMDISK_HOOKS */ 474 475 physical_freestart = (((unsigned long)esym - KERNEL_TEXT_BASE + 0xfff) & ~0xfff) + loadaddr; 476 physical_freeend = MIN((uint64_t)physical_end, (paddr_t)-PAGE_SIZE); 477 478 physmem = (physical_end - physical_start) / PAGE_SIZE; 479 480 #ifdef DEBUG 481 /* Tell the user about the memory */ 482 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 483 physical_start, physical_end - 1); 484 #endif 485 486 /* 487 * Okay, the kernel starts 2MB in from the bottom of physical 488 * memory. We are going to allocate our bootstrap pages downwards 489 * from there. 490 * 491 * We need to allocate some fixed page tables to get the kernel 492 * going. We allocate one page directory and a number of page 493 * tables and store the physical addresses in the kernel_pt_table 494 * array. 495 * 496 * The kernel page directory must be on a 16K boundary. The page 497 * tables must be on 4K bounaries. What we do is allocate the 498 * page directory on the first 16K boundary that we encounter, and 499 * the page tables on 4K boundaries otherwise. Since we allocate 500 * at least 3 L2 page tables, we are guaranteed to encounter at 501 * least one 16K aligned region. 502 */ 503 504 #ifdef VERBOSE_INIT_ARM 505 printf("Allocating page tables\n"); 506 #endif 507 508 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 509 510 #ifdef VERBOSE_INIT_ARM 511 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 512 physical_freestart, free_pages, free_pages); 513 #endif 514 515 /* Define a macro to simplify memory allocation */ 516 #define valloc_pages(var, np) \ 517 alloc_pages((var).pv_pa, (np)); \ 518 (var).pv_va = KERNEL_BASE + (var).pv_pa - loadaddr; 519 520 #define alloc_pages(var, np) \ 521 (var) = physical_freestart; \ 522 physical_freestart += ((np) * PAGE_SIZE); \ 523 if (physical_freeend < physical_freestart) \ 524 panic("initarm: out of memory"); \ 525 free_pages -= (np); \ 526 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 527 528 loop1 = 0; 529 kernel_l1pt.pv_pa = 0; 530 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 531 /* Are we 16KB aligned for an L1 ? */ 532 if (((physical_freestart) & (L1_TABLE_SIZE - 1)) == 0 533 && kernel_l1pt.pv_pa == 0) { 534 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 535 } else { 536 valloc_pages(kernel_pt_table[loop1], 537 L2_TABLE_SIZE / PAGE_SIZE); 538 ++loop1; 539 } 540 } 541 542 /* This should never be able to happen but better confirm that. */ 543 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 544 panic("initarm: Failed to align the kernel page directory"); 545 546 /* 547 * Allocate a page for the system page mapped to V0x00000000 548 * This page will just contain the system vectors and can be 549 * shared by all processes. 550 */ 551 vector_page = ARM_VECTORS_HIGH; 552 alloc_pages(systempage.pv_pa, 1); 553 systempage.pv_va = vector_page; 554 555 /* Allocate stacks for all modes */ 556 valloc_pages(irqstack, IRQ_STACK_SIZE); 557 valloc_pages(abtstack, ABT_STACK_SIZE); 558 valloc_pages(undstack, UND_STACK_SIZE); 559 valloc_pages(kernelstack, UPAGES); 560 561 /* Allocate enough pages for cleaning the Mini-Data cache. */ 562 563 #ifdef VERBOSE_INIT_ARM 564 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 565 irqstack.pv_va); 566 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 567 abtstack.pv_va); 568 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 569 undstack.pv_va); 570 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 571 kernelstack.pv_va); 572 #endif 573 574 /* 575 * Allocate pages for an FDT copy. 576 */ 577 size = fdt_get_size(config); 578 valloc_pages(fdt, round_page(size) / PAGE_SIZE); 579 memcpy((void *)fdt.pv_pa, config, size); 580 581 /* 582 * XXX Defer this to later so that we can reclaim the memory 583 */ 584 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 585 586 /* 587 * Ok we have allocated physical pages for the primary kernel 588 * page tables 589 */ 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 593 #endif 594 595 /* 596 * Now we start construction of the L1 page table 597 * We start by mapping the L2 page tables into the L1. 598 * This means that we can replace L1 mappings later on if necessary 599 */ 600 l1pagetable = kernel_l1pt.pv_pa; 601 602 /* Map the L2 pages tables in the L1 page table */ 603 pmap_link_l2pt(l1pagetable, vector_page & ~(0x00400000 - 1), 604 &kernel_pt_table[KERNEL_PT_SYS]); 605 606 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 607 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 608 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 609 610 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 611 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 612 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 613 614 /* update the top of the kernel VM */ 615 pmap_curmaxkvaddr = 616 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 617 618 #ifdef VERBOSE_INIT_ARM 619 printf("Mapping kernel\n"); 620 #endif 621 622 /* Now we fill in the L2 pagetable for the kernel static code/data */ 623 { 624 extern char etext[]; 625 size_t textsize = (u_int32_t) etext - KERNEL_TEXT_BASE; 626 size_t totalsize = (u_int32_t) esym - KERNEL_TEXT_BASE; 627 u_int logical; 628 629 textsize = (textsize + PGOFSET) & ~PGOFSET; 630 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 631 632 logical = 0x00000000; /* offset of kernel in RAM */ 633 634 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 635 loadaddr + logical, textsize, 636 PROT_READ | PROT_EXEC, PTE_CACHE); 637 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 638 loadaddr + logical, totalsize - textsize, 639 PROT_READ | PROT_WRITE, PTE_CACHE); 640 } 641 642 #ifdef VERBOSE_INIT_ARM 643 printf("Constructing L2 page tables\n"); 644 #endif 645 646 /* Map the stack pages */ 647 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 648 IRQ_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 649 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 650 ABT_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 651 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 652 UND_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 653 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 654 UPAGES * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 655 656 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 657 L1_TABLE_SIZE, PROT_READ | PROT_WRITE, PTE_PAGETABLE); 658 659 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 660 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 661 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 662 PROT_READ | PROT_WRITE, PTE_PAGETABLE); 663 } 664 665 /* Map the Mini-Data cache clean area. */ 666 667 /* Map the vector page. */ 668 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 669 PROT_READ | PROT_WRITE, PTE_CACHE); 670 671 /* Map the FDT. */ 672 pmap_map_chunk(l1pagetable, fdt.pv_va, fdt.pv_pa, 673 round_page(fdt_get_size((void *)fdt.pv_pa)), 674 PROT_READ | PROT_WRITE, PTE_CACHE); 675 676 /* 677 * map integrated peripherals at same address in l1pagetable 678 * so that we can continue to use console. 679 */ 680 copy_io_area_map((pd_entry_t *)l1pagetable); 681 682 /* 683 * Now we have the real page tables in place so we can switch to them. 684 * Once this is done we will be running with the REAL kernel page 685 * tables. 686 */ 687 setttb(kernel_l1pt.pv_pa); 688 cpu_tlb_flushID(); 689 690 /* 691 * Moved from cpu_startup() as data_abort_handler() references 692 * this during uvm init 693 */ 694 proc0paddr = (struct user *)kernelstack.pv_va; 695 proc0.p_addr = proc0paddr; 696 697 arm32_vector_init(vector_page, ARM_VEC_ALL); 698 699 /* 700 * Pages were allocated during the secondary bootstrap for the 701 * stacks for different CPU modes. 702 * We must now set the r13 registers in the different CPU modes to 703 * point to these stacks. 704 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 705 * of the stack memory. 706 */ 707 708 set_stackptr(PSR_IRQ32_MODE, 709 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 710 set_stackptr(PSR_ABT32_MODE, 711 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 712 set_stackptr(PSR_UND32_MODE, 713 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 714 715 /* 716 * Well we should set a data abort handler. 717 * Once things get going this will change as we will need a proper 718 * handler. 719 * Until then we will use a handler that just panics but tells us 720 * why. 721 * Initialisation of the vectors will just panic on a data abort. 722 * This just fills in a slighly better one. 723 */ 724 725 data_abort_handler_address = (u_int)data_abort_handler; 726 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 727 undefined_handler_address = (u_int)undefinedinstruction_bounce; 728 729 /* Now we can reinit the FDT, using the virtual address. */ 730 fdt_init((void *)fdt.pv_va); 731 732 /* Initialise the undefined instruction handlers */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("undefined "); 735 #endif 736 undefined_init(); 737 738 /* Load memory into UVM. */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("page "); 741 #endif 742 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 743 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 744 atop(physical_freestart), atop(physical_freeend), 0); 745 746 if (physical_start < loadaddr) { 747 uvm_page_physload(atop(physical_start), atop(loadaddr), 748 atop(physical_start), atop(loadaddr), 0); 749 physsegs--; 750 } 751 752 node = fdt_find_node("/memory"); 753 for (i = 1; i < physsegs; i++) { 754 if (fdt_get_reg(node, i, ®)) 755 break; 756 if (reg.size == 0) 757 continue; 758 759 memstart = reg.addr; 760 memend = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 761 physmem += (memend - memstart) / PAGE_SIZE; 762 uvm_page_physload(atop(memstart), atop(memend), 763 atop(memstart), atop(memend), 0); 764 } 765 766 /* Boot strap pmap telling it where the kernel page table is */ 767 #ifdef VERBOSE_INIT_ARM 768 printf("pmap "); 769 #endif 770 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 771 KERNEL_VM_BASE + KERNEL_VM_SIZE); 772 773 vector_page_setprot(PROT_READ | PROT_EXEC); 774 775 /* 776 * Restore proper bus_space operation, now that pmap is initialized. 777 */ 778 armv7_bs_tag.bs_map = map_func_save; 779 armv7_a4x_bs_tag.bs_map = map_func_save; 780 781 #ifdef DDB 782 db_machine_init(); 783 784 /* Firmware doesn't load symbols. */ 785 ddb_init(); 786 787 if (boothowto & RB_KDB) 788 db_enter(); 789 #endif 790 printf("board type: %u\n", board_id); 791 792 cpu_setup(); 793 794 /* We return the new stack pointer address */ 795 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 796 } 797 798 799 void 800 process_kernel_args(char *args) 801 { 802 char *cp = args; 803 804 if (cp == NULL) { 805 boothowto = RB_AUTOBOOT; 806 return; 807 } 808 809 boothowto = 0; 810 811 /* Make a local copy of the bootargs */ 812 strncpy(bootargs, cp, MAX_BOOT_STRING - sizeof(int)); 813 814 cp = bootargs; 815 boot_file = bootargs; 816 817 /* Skip the kernel image filename */ 818 while (*cp != ' ' && *cp != 0) 819 ++cp; 820 821 if (*cp != 0) 822 *cp++ = 0; 823 824 while (*cp == ' ') 825 ++cp; 826 827 boot_args = cp; 828 829 printf("bootfile: %s\n", boot_file); 830 printf("bootargs: %s\n", boot_args); 831 832 /* Setup pointer to boot flags */ 833 while (*cp != '-') 834 if (*cp++ == '\0') 835 return; 836 837 for (;*++cp;) { 838 int fl; 839 840 fl = 0; 841 switch(*cp) { 842 case 'a': 843 fl |= RB_ASKNAME; 844 break; 845 case 'c': 846 fl |= RB_CONFIG; 847 break; 848 case 'd': 849 fl |= RB_KDB; 850 break; 851 case 's': 852 fl |= RB_SINGLE; 853 break; 854 default: 855 printf("unknown option `%c'\n", *cp); 856 break; 857 } 858 boothowto |= fl; 859 } 860 } 861 862 void * 863 fdt_find_cons(const char *name) 864 { 865 char *alias = "serial0"; 866 char buf[128]; 867 char *stdout = NULL; 868 char *p; 869 void *node; 870 871 /* First check if "stdout-path" is set. */ 872 node = fdt_find_node("/chosen"); 873 if (node) { 874 if (fdt_node_property(node, "stdout-path", &stdout) > 0) { 875 if (strchr(stdout, ':') != NULL) { 876 strlcpy(buf, stdout, sizeof(buf)); 877 if ((p = strchr(buf, ':')) != NULL) 878 *p = '\0'; 879 stdout = buf; 880 } 881 if (stdout[0] != '/') { 882 /* It's an alias. */ 883 alias = stdout; 884 stdout = NULL; 885 } 886 } 887 } 888 889 /* Perform alias lookup if necessary. */ 890 if (stdout == NULL) { 891 node = fdt_find_node("/aliases"); 892 if (node) 893 fdt_node_property(node, alias, &stdout); 894 } 895 896 /* Lookup the physical address of the interface. */ 897 if (stdout) { 898 node = fdt_find_node(stdout); 899 if (node && fdt_is_compatible(node, name)) { 900 stdout_node = OF_finddevice(stdout); 901 return (node); 902 } 903 } 904 905 return (NULL); 906 } 907 908 void 909 consinit(void) 910 { 911 static int consinit_called = 0; 912 913 if (consinit_called != 0) 914 return; 915 916 consinit_called = 1; 917 918 platform_init_cons(); 919 } 920 921 void 922 board_startup(void) 923 { 924 if (boothowto & RB_CONFIG) { 925 #ifdef BOOT_CONFIG 926 user_config(); 927 #else 928 printf("kernel does not support -c; continuing..\n"); 929 #endif 930 } 931 } 932