1 /* $OpenBSD: armv7_machdep.c,v 1.52 2018/05/07 14:13:54 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 uint8_t *bootmac = NULL; 153 u_int cpu_reset_address = 0; 154 155 vaddr_t physical_start; 156 vaddr_t physical_freestart; 157 vaddr_t physical_freeend; 158 vaddr_t physical_end; 159 u_int free_pages; 160 int physmem = 0; 161 162 /*int debug_flags;*/ 163 #ifndef PMAP_STATIC_L1S 164 int max_processes = 64; /* Default number */ 165 #endif /* !PMAP_STATIC_L1S */ 166 167 /* Physical and virtual addresses for some global pages */ 168 pv_addr_t systempage; 169 pv_addr_t irqstack; 170 pv_addr_t undstack; 171 pv_addr_t abtstack; 172 extern pv_addr_t kernelstack; 173 174 vaddr_t msgbufphys; 175 176 extern u_int data_abort_handler_address; 177 extern u_int prefetch_abort_handler_address; 178 extern u_int undefined_handler_address; 179 180 uint32_t board_id; 181 182 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 183 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 184 #define KERNEL_PT_KERNEL_NUM 32 185 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 186 /* Page tables for mapping kernel VM */ 187 #define KERNEL_PT_VMDATA_NUM 8 /* start with 16MB of KVM */ 188 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 189 190 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 191 192 extern struct user *proc0paddr; 193 194 /* 195 * safepri is a safe priority for sleep to set for a spin-wait 196 * during autoconfiguration or after a panic. 197 */ 198 int safepri = 0; 199 200 /* Prototypes */ 201 202 char bootargs[MAX_BOOT_STRING]; 203 int bootstrap_bs_map(void *, uint64_t, bus_size_t, int, 204 bus_space_handle_t *); 205 void process_kernel_args(char *); 206 void consinit(void); 207 208 bs_protos(bs_notimpl); 209 210 #ifndef CONSPEED 211 #define CONSPEED B115200 /* What u-boot */ 212 #endif 213 #ifndef CONMODE 214 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 215 #endif 216 217 int comcnspeed = CONSPEED; 218 int comcnmode = CONMODE; 219 220 int stdout_node; 221 int stdout_speed; 222 223 void (*cpuresetfn)(void); 224 void (*powerdownfn)(void); 225 226 /* 227 * void boot(int howto, char *bootstr) 228 * 229 * Reboots the system 230 * 231 * Deal with any syncing, unmounting, dumping and shutdown hooks, 232 * then reset the CPU. 233 */ 234 __dead void 235 boot(int howto) 236 { 237 if (cold) { 238 if ((howto & RB_USERREQ) == 0) 239 howto |= RB_HALT; 240 goto haltsys; 241 } 242 243 /* Disable console buffering */ 244 /* cnpollc(1);*/ 245 246 /* 247 * If RB_NOSYNC was not specified sync the discs. 248 * Note: Unless cold is set to 1 here, syslogd will die during the 249 * unmount. It looks like syslogd is getting woken up only to find 250 * that it cannot page part of the binary in as the filesystem has 251 * been unmounted. 252 */ 253 if ((howto & RB_NOSYNC) == 0) 254 bootsync(howto); 255 256 if_downall(); 257 258 uvm_shutdown(); 259 splhigh(); 260 cold = 1; 261 262 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 263 dumpsys(); 264 265 haltsys: 266 config_suspend_all(DVACT_POWERDOWN); 267 268 /* Make sure IRQ's are disabled */ 269 IRQdisable; 270 271 if ((howto & RB_HALT) != 0) { 272 if ((howto & RB_POWERDOWN) != 0) { 273 printf("\nAttempting to power down...\n"); 274 delay(500000); 275 if (powerdownfn) 276 (*powerdownfn)(); 277 } 278 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 } 283 284 printf("rebooting...\n"); 285 delay(500000); 286 if (cpuresetfn) 287 (*cpuresetfn)(); 288 printf("reboot failed; spinning\n"); 289 for (;;) 290 continue; 291 /* NOTREACHED */ 292 } 293 294 static __inline 295 pd_entry_t * 296 read_ttb(void) 297 { 298 long ttb; 299 300 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 301 302 303 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 304 } 305 306 #define VERBOSE_INIT_ARM 307 308 /* 309 * simple memory mapping function used in early bootstrap stage 310 * before pmap is initialized. 311 * ignores cacheability and does map the sections with nocache. 312 */ 313 static vaddr_t section_free = 0xfd000000; /* XXX - huh */ 314 315 int 316 bootstrap_bs_map(void *t, uint64_t bpa, bus_size_t size, 317 int flags, bus_space_handle_t *bshp) 318 { 319 u_long startpa, pa, endpa; 320 vaddr_t va; 321 pd_entry_t *pagedir = read_ttb(); 322 /* This assumes PA==VA for page directory */ 323 324 va = section_free; 325 326 startpa = bpa & ~L1_S_OFFSET; 327 endpa = (bpa + size) & ~L1_S_OFFSET; 328 if ((bpa + size) & L1_S_OFFSET) 329 endpa += L1_S_SIZE; 330 331 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 332 333 for (pa = startpa; pa < endpa; pa += L1_S_SIZE, va += L1_S_SIZE) 334 pmap_map_section((vaddr_t)pagedir, va, pa, 335 PROT_READ | PROT_WRITE, PTE_NOCACHE); 336 337 cpu_tlb_flushD(); 338 339 section_free = va; 340 341 return 0; 342 } 343 344 static void 345 copy_io_area_map(pd_entry_t *new_pd) 346 { 347 pd_entry_t *cur_pd = read_ttb(); 348 vaddr_t va; 349 350 for (va = MACHINE_IO_AREA_VBASE; 351 (cur_pd[va>>L1_S_SHIFT] & L1_TYPE_MASK) == L1_TYPE_S; 352 va += L1_S_SIZE) { 353 354 new_pd[va>>L1_S_SHIFT] = cur_pd[va>>L1_S_SHIFT]; 355 if (va == (ARM_VECTORS_HIGH & ~(0x00400000 - 1))) 356 break; /* STUPID */ 357 358 } 359 } 360 361 /* 362 * u_int initarm(...) 363 * 364 * Initial entry point on startup. This gets called before main() is 365 * entered. 366 * It should be responsible for setting up everything that must be 367 * in place when main is called. 368 * This includes 369 * Taking a copy of the FDT. 370 * Initialising the physical console so characters can be printed. 371 * Setting up page tables for the kernel. 372 */ 373 u_int 374 initarm(void *arg0, void *arg1, void *arg2, paddr_t loadaddr) 375 { 376 int loop, loop1, i, physsegs = VM_PHYSSEG_MAX; 377 u_int l1pagetable; 378 pv_addr_t kernel_l1pt; 379 pv_addr_t fdt; 380 struct fdt_reg reg; 381 paddr_t memstart; 382 psize_t memsize; 383 paddr_t memend; 384 void *config; 385 size_t size; 386 void *node; 387 extern uint32_t esym; /* &_end if no symbols are loaded */ 388 389 /* early bus_space_map support */ 390 struct bus_space tmp_bs_tag; 391 int (*map_func_save)(void *, uint64_t, bus_size_t, int, 392 bus_space_handle_t *); 393 394 if (arg0) 395 esym = (uint32_t)arg0; 396 397 board_id = (uint32_t)arg1; 398 /* 399 * u-boot has decided the top four bits are 400 * 'compatibility revision' for sunxi 401 */ 402 if (board_id != 0xffffffff) 403 board_id &= 0x0fffffff; 404 405 /* 406 * Heads up ... Setup the CPU / MMU / TLB functions 407 */ 408 if (set_cpufuncs()) 409 panic("cpu not recognized!"); 410 411 /* 412 * Temporarily replace bus_space_map() functions so that 413 * console devices can get mapped. 414 * 415 * Note that this relies upon the fact that both regular 416 * and a4x bus_space tags use the same map function. 417 */ 418 tmp_bs_tag = armv7_bs_tag; 419 map_func_save = armv7_bs_tag.bs_map; 420 armv7_bs_tag.bs_map = bootstrap_bs_map; 421 armv7_a4x_bs_tag.bs_map = bootstrap_bs_map; 422 tmp_bs_tag.bs_map = bootstrap_bs_map; 423 424 /* 425 * Now, map the FDT area. 426 * 427 * As we don't know the size of a possible FDT, map the size of a 428 * typical bootstrap bs map. The FDT might not be aligned, so this 429 * might take up to two L1_S_SIZEd mappings. 430 * 431 * XXX: There's (currently) no way to unmap a bootstrap mapping, so 432 * we might lose a bit of the bootstrap address space. 433 */ 434 bootstrap_bs_map(NULL, (bus_addr_t)arg2, L1_S_SIZE, 0, 435 (bus_space_handle_t *)&config); 436 437 if (!fdt_init(config) || fdt_get_size(config) == 0) 438 panic("initarm: no FDT"); 439 440 node = fdt_find_node("/chosen"); 441 if (node != NULL) { 442 char *prop; 443 int len; 444 static uint8_t lladdr[6]; 445 446 len = fdt_node_property(node, "bootargs", &prop); 447 if (len > 0) 448 process_kernel_args(prop); 449 450 len = fdt_node_property(node, "openbsd,bootduid", &prop); 451 if (len == sizeof(bootduid)) 452 memcpy(bootduid, prop, sizeof(bootduid)); 453 454 len = fdt_node_property(node, "openbsd,bootmac", &prop); 455 if (len == sizeof(lladdr)) { 456 memcpy(lladdr, prop, sizeof(lladdr)); 457 bootmac = lladdr; 458 } 459 } 460 461 node = fdt_find_node("/memory"); 462 if (node == NULL || fdt_get_reg(node, 0, ®)) 463 panic("initarm: no memory specificed"); 464 465 memstart = reg.addr; 466 memsize = reg.size; 467 physical_start = reg.addr; 468 physical_end = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 469 470 platform_init(); 471 472 /* setup a serial console for very early boot */ 473 consinit(); 474 475 /* Talk to the user */ 476 printf("\nOpenBSD/armv7 booting ...\n"); 477 478 printf("arg0 %p arg1 %p arg2 %p\n", arg0, arg1, arg2); 479 480 #ifdef RAMDISK_HOOKS 481 boothowto |= RB_DFLTROOT; 482 #endif /* RAMDISK_HOOKS */ 483 484 physical_freestart = (((unsigned long)esym - KERNEL_TEXT_BASE + 0xfff) & ~0xfff) + loadaddr; 485 physical_freeend = MIN((uint64_t)physical_end, (paddr_t)-PAGE_SIZE); 486 487 physmem = (physical_end - physical_start) / PAGE_SIZE; 488 489 #ifdef DEBUG 490 /* Tell the user about the memory */ 491 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 492 physical_start, physical_end - 1); 493 #endif 494 495 /* 496 * Okay, the kernel starts 2MB in from the bottom of physical 497 * memory. We are going to allocate our bootstrap pages downwards 498 * from there. 499 * 500 * We need to allocate some fixed page tables to get the kernel 501 * going. We allocate one page directory and a number of page 502 * tables and store the physical addresses in the kernel_pt_table 503 * array. 504 * 505 * The kernel page directory must be on a 16K boundary. The page 506 * tables must be on 4K bounaries. What we do is allocate the 507 * page directory on the first 16K boundary that we encounter, and 508 * the page tables on 4K boundaries otherwise. Since we allocate 509 * at least 3 L2 page tables, we are guaranteed to encounter at 510 * least one 16K aligned region. 511 */ 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("Allocating page tables\n"); 515 #endif 516 517 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 521 physical_freestart, free_pages, free_pages); 522 #endif 523 524 /* Define a macro to simplify memory allocation */ 525 #define valloc_pages(var, np) \ 526 alloc_pages((var).pv_pa, (np)); \ 527 (var).pv_va = KERNEL_BASE + (var).pv_pa - loadaddr; 528 529 #define alloc_pages(var, np) \ 530 (var) = physical_freestart; \ 531 physical_freestart += ((np) * PAGE_SIZE); \ 532 if (physical_freeend < physical_freestart) \ 533 panic("initarm: out of memory"); \ 534 free_pages -= (np); \ 535 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 536 537 loop1 = 0; 538 kernel_l1pt.pv_pa = 0; 539 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 540 /* Are we 16KB aligned for an L1 ? */ 541 if (((physical_freestart) & (L1_TABLE_SIZE - 1)) == 0 542 && kernel_l1pt.pv_pa == 0) { 543 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 544 } else { 545 valloc_pages(kernel_pt_table[loop1], 546 L2_TABLE_SIZE / PAGE_SIZE); 547 ++loop1; 548 } 549 } 550 551 /* This should never be able to happen but better confirm that. */ 552 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 553 panic("initarm: Failed to align the kernel page directory"); 554 555 /* 556 * Allocate a page for the system page mapped to V0x00000000 557 * This page will just contain the system vectors and can be 558 * shared by all processes. 559 */ 560 vector_page = ARM_VECTORS_HIGH; 561 alloc_pages(systempage.pv_pa, 1); 562 systempage.pv_va = vector_page; 563 564 /* Allocate stacks for all modes */ 565 valloc_pages(irqstack, IRQ_STACK_SIZE); 566 valloc_pages(abtstack, ABT_STACK_SIZE); 567 valloc_pages(undstack, UND_STACK_SIZE); 568 valloc_pages(kernelstack, UPAGES); 569 570 /* Allocate enough pages for cleaning the Mini-Data cache. */ 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 574 irqstack.pv_va); 575 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 576 abtstack.pv_va); 577 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 578 undstack.pv_va); 579 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 580 kernelstack.pv_va); 581 #endif 582 583 /* 584 * Allocate pages for an FDT copy. 585 */ 586 size = fdt_get_size(config); 587 valloc_pages(fdt, round_page(size) / PAGE_SIZE); 588 memcpy((void *)fdt.pv_pa, config, size); 589 590 /* 591 * XXX Defer this to later so that we can reclaim the memory 592 */ 593 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 594 595 /* 596 * Ok we have allocated physical pages for the primary kernel 597 * page tables 598 */ 599 600 #ifdef VERBOSE_INIT_ARM 601 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 602 #endif 603 604 /* 605 * Now we start construction of the L1 page table 606 * We start by mapping the L2 page tables into the L1. 607 * This means that we can replace L1 mappings later on if necessary 608 */ 609 l1pagetable = kernel_l1pt.pv_pa; 610 611 /* Map the L2 pages tables in the L1 page table */ 612 pmap_link_l2pt(l1pagetable, vector_page & ~(0x00400000 - 1), 613 &kernel_pt_table[KERNEL_PT_SYS]); 614 615 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 616 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 617 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 618 619 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 620 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 621 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 622 623 /* update the top of the kernel VM */ 624 pmap_curmaxkvaddr = 625 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 626 627 #ifdef VERBOSE_INIT_ARM 628 printf("Mapping kernel\n"); 629 #endif 630 631 /* Now we fill in the L2 pagetable for the kernel static code/data */ 632 { 633 extern char __text_start[], _etext[]; 634 extern char __rodata_start[], _erodata[]; 635 size_t textsize = (u_int32_t) (_etext - __text_start); 636 size_t rodatasize = (u_int32_t) (_erodata - __rodata_start); 637 size_t totalsize = esym - (u_int32_t)__text_start; 638 u_int logical; 639 640 textsize = (textsize + PGOFSET) & ~PGOFSET; 641 rodatasize = (rodatasize + PGOFSET) & ~PGOFSET; 642 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 643 644 logical = 0x00300000; /* 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, rodatasize, 651 PROT_READ, PTE_CACHE); 652 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 653 loadaddr + logical, totalsize - (textsize + rodatasize), 654 PROT_READ | PROT_WRITE, PTE_CACHE); 655 } 656 657 #ifdef VERBOSE_INIT_ARM 658 printf("Constructing L2 page tables\n"); 659 #endif 660 661 /* Map the stack pages */ 662 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 663 IRQ_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 664 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 665 ABT_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 666 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 667 UND_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 668 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 669 UPAGES * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 670 671 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 672 L1_TABLE_SIZE, PROT_READ | PROT_WRITE, PTE_PAGETABLE); 673 674 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 675 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 676 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 677 PROT_READ | PROT_WRITE, PTE_PAGETABLE); 678 } 679 680 /* Map the Mini-Data cache clean area. */ 681 682 /* Map the vector page. */ 683 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 684 PROT_READ | PROT_WRITE, PTE_CACHE); 685 686 /* Map the FDT. */ 687 pmap_map_chunk(l1pagetable, fdt.pv_va, fdt.pv_pa, 688 round_page(fdt_get_size((void *)fdt.pv_pa)), 689 PROT_READ | PROT_WRITE, PTE_CACHE); 690 691 /* 692 * map integrated peripherals at same address in l1pagetable 693 * so that we can continue to use console. 694 */ 695 copy_io_area_map((pd_entry_t *)l1pagetable); 696 697 /* 698 * Now we have the real page tables in place so we can switch to them. 699 * Once this is done we will be running with the REAL kernel page 700 * tables. 701 */ 702 setttb(kernel_l1pt.pv_pa); 703 cpu_tlb_flushID(); 704 705 /* 706 * Moved from cpu_startup() as data_abort_handler() references 707 * this during uvm init 708 */ 709 proc0paddr = (struct user *)kernelstack.pv_va; 710 proc0.p_addr = proc0paddr; 711 712 arm32_vector_init(vector_page, ARM_VEC_ALL); 713 714 /* 715 * Pages were allocated during the secondary bootstrap for the 716 * stacks for different CPU modes. 717 * We must now set the r13 registers in the different CPU modes to 718 * point to these stacks. 719 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 720 * of the stack memory. 721 */ 722 723 set_stackptr(PSR_IRQ32_MODE, 724 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 725 set_stackptr(PSR_ABT32_MODE, 726 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 727 set_stackptr(PSR_UND32_MODE, 728 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 729 730 /* 731 * Well we should set a data abort handler. 732 * Once things get going this will change as we will need a proper 733 * handler. 734 * Until then we will use a handler that just panics but tells us 735 * why. 736 * Initialisation of the vectors will just panic on a data abort. 737 * This just fills in a slighly better one. 738 */ 739 740 data_abort_handler_address = (u_int)data_abort_handler; 741 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 742 undefined_handler_address = (u_int)undefinedinstruction_bounce; 743 744 /* Now we can reinit the FDT, using the virtual address. */ 745 fdt_init((void *)fdt.pv_va); 746 747 /* Initialise the undefined instruction handlers */ 748 #ifdef VERBOSE_INIT_ARM 749 printf("undefined "); 750 #endif 751 undefined_init(); 752 753 /* Load memory into UVM. */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("page "); 756 #endif 757 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 758 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 759 atop(physical_freestart), atop(physical_freeend), 0); 760 761 if (physical_start < loadaddr) { 762 uvm_page_physload(atop(physical_start), atop(loadaddr), 763 atop(physical_start), atop(loadaddr), 0); 764 physsegs--; 765 } 766 767 node = fdt_find_node("/memory"); 768 for (i = 1; i < physsegs; i++) { 769 if (fdt_get_reg(node, i, ®)) 770 break; 771 if (reg.size == 0) 772 continue; 773 774 memstart = reg.addr; 775 memend = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 776 physmem += (memend - memstart) / PAGE_SIZE; 777 uvm_page_physload(atop(memstart), atop(memend), 778 atop(memstart), atop(memend), 0); 779 } 780 781 /* Boot strap pmap telling it where the kernel page table is */ 782 #ifdef VERBOSE_INIT_ARM 783 printf("pmap "); 784 #endif 785 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 786 KERNEL_VM_BASE + KERNEL_VM_SIZE); 787 788 vector_page_setprot(PROT_READ | PROT_EXEC); 789 790 /* 791 * Restore proper bus_space operation, now that pmap is initialized. 792 */ 793 armv7_bs_tag.bs_map = map_func_save; 794 armv7_a4x_bs_tag.bs_map = map_func_save; 795 796 #ifdef DDB 797 db_machine_init(); 798 799 /* Firmware doesn't load symbols. */ 800 ddb_init(); 801 802 if (boothowto & RB_KDB) 803 db_enter(); 804 #endif 805 printf("board type: %u\n", board_id); 806 807 cpu_setup(); 808 809 /* We return the new stack pointer address */ 810 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 811 } 812 813 814 void 815 process_kernel_args(char *args) 816 { 817 char *cp = args; 818 819 if (cp == NULL) { 820 boothowto = RB_AUTOBOOT; 821 return; 822 } 823 824 boothowto = 0; 825 826 /* Make a local copy of the bootargs */ 827 strncpy(bootargs, cp, MAX_BOOT_STRING - sizeof(int)); 828 829 cp = bootargs; 830 boot_file = bootargs; 831 832 /* Skip the kernel image filename */ 833 while (*cp != ' ' && *cp != 0) 834 ++cp; 835 836 if (*cp != 0) 837 *cp++ = 0; 838 839 while (*cp == ' ') 840 ++cp; 841 842 boot_args = cp; 843 844 printf("bootfile: %s\n", boot_file); 845 printf("bootargs: %s\n", boot_args); 846 847 /* Setup pointer to boot flags */ 848 while (*cp != '-') 849 if (*cp++ == '\0') 850 return; 851 852 for (;*++cp;) { 853 int fl; 854 855 fl = 0; 856 switch(*cp) { 857 case 'a': 858 fl |= RB_ASKNAME; 859 break; 860 case 'c': 861 fl |= RB_CONFIG; 862 break; 863 case 'd': 864 fl |= RB_KDB; 865 break; 866 case 's': 867 fl |= RB_SINGLE; 868 break; 869 default: 870 printf("unknown option `%c'\n", *cp); 871 break; 872 } 873 boothowto |= fl; 874 } 875 } 876 877 static int 878 atoi(const char *s) 879 { 880 int n, neg; 881 882 n = 0; 883 neg = 0; 884 885 while (*s == '-') { 886 s++; 887 neg = !neg; 888 } 889 890 while (*s != '\0') { 891 if (*s < '0' || *s > '9') 892 break; 893 894 n = (10 * n) + (*s - '0'); 895 s++; 896 } 897 898 return (neg ? -n : n); 899 } 900 901 void * 902 fdt_find_cons(const char *name) 903 { 904 char *alias = "serial0"; 905 char buf[128]; 906 char *stdout = NULL; 907 char *p; 908 void *node; 909 910 /* First check if "stdout-path" is set. */ 911 node = fdt_find_node("/chosen"); 912 if (node) { 913 if (fdt_node_property(node, "stdout-path", &stdout) > 0) { 914 if (strchr(stdout, ':') != NULL) { 915 strlcpy(buf, stdout, sizeof(buf)); 916 if ((p = strchr(buf, ':')) != NULL) { 917 *p++ = '\0'; 918 stdout_speed = atoi(p); 919 } 920 stdout = buf; 921 } 922 if (stdout[0] != '/') { 923 /* It's an alias. */ 924 alias = stdout; 925 stdout = NULL; 926 } 927 } 928 } 929 930 /* Perform alias lookup if necessary. */ 931 if (stdout == NULL) { 932 node = fdt_find_node("/aliases"); 933 if (node) 934 fdt_node_property(node, alias, &stdout); 935 } 936 937 /* Lookup the physical address of the interface. */ 938 if (stdout) { 939 node = fdt_find_node(stdout); 940 if (node && fdt_is_compatible(node, name)) { 941 stdout_node = OF_finddevice(stdout); 942 return (node); 943 } 944 } 945 946 return (NULL); 947 } 948 949 void 950 consinit(void) 951 { 952 static int consinit_called = 0; 953 954 if (consinit_called != 0) 955 return; 956 957 consinit_called = 1; 958 959 platform_init_cons(); 960 } 961 962 void 963 board_startup(void) 964 { 965 if (boothowto & RB_CONFIG) { 966 #ifdef BOOT_CONFIG 967 user_config(); 968 #else 969 printf("kernel does not support -c; continuing..\n"); 970 #endif 971 } 972 } 973