1 /* $OpenBSD: armv7_machdep.c,v 1.55 2018/08/06 18:39:13 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 int stdout_node; 211 int stdout_speed; 212 213 void (*cpuresetfn)(void); 214 void (*powerdownfn)(void); 215 216 /* 217 * void boot(int howto, char *bootstr) 218 * 219 * Reboots the system 220 * 221 * Deal with any syncing, unmounting, dumping and shutdown hooks, 222 * then reset the CPU. 223 */ 224 __dead void 225 boot(int howto) 226 { 227 if (cold) { 228 if ((howto & RB_USERREQ) == 0) 229 howto |= RB_HALT; 230 goto haltsys; 231 } 232 233 /* Disable console buffering */ 234 /* cnpollc(1);*/ 235 236 /* 237 * If RB_NOSYNC was not specified sync the discs. 238 * Note: Unless cold is set to 1 here, syslogd will die during the 239 * unmount. It looks like syslogd is getting woken up only to find 240 * that it cannot page part of the binary in as the filesystem has 241 * been unmounted. 242 */ 243 if ((howto & RB_NOSYNC) == 0) 244 bootsync(howto); 245 246 if_downall(); 247 248 uvm_shutdown(); 249 splhigh(); 250 cold = 1; 251 252 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 253 dumpsys(); 254 255 haltsys: 256 config_suspend_all(DVACT_POWERDOWN); 257 258 /* Make sure IRQ's are disabled */ 259 intr_disable(); 260 261 if ((howto & RB_HALT) != 0) { 262 if ((howto & RB_POWERDOWN) != 0) { 263 printf("\nAttempting to power down...\n"); 264 delay(500000); 265 if (powerdownfn) 266 (*powerdownfn)(); 267 } 268 269 printf("The operating system has halted.\n"); 270 printf("Please press any key to reboot.\n\n"); 271 cngetc(); 272 } 273 274 printf("rebooting...\n"); 275 delay(500000); 276 if (cpuresetfn) 277 (*cpuresetfn)(); 278 printf("reboot failed; spinning\n"); 279 for (;;) 280 continue; 281 /* NOTREACHED */ 282 } 283 284 static __inline 285 pd_entry_t * 286 read_ttb(void) 287 { 288 long ttb; 289 290 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 291 292 293 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 294 } 295 296 #define VERBOSE_INIT_ARM 297 298 /* 299 * simple memory mapping function used in early bootstrap stage 300 * before pmap is initialized. 301 * ignores cacheability and does map the sections with nocache. 302 */ 303 static vaddr_t section_free = 0xfd000000; /* XXX - huh */ 304 305 int 306 bootstrap_bs_map(void *t, uint64_t bpa, bus_size_t size, 307 int flags, bus_space_handle_t *bshp) 308 { 309 u_long startpa, pa, endpa; 310 vaddr_t va; 311 pd_entry_t *pagedir = read_ttb(); 312 /* This assumes PA==VA for page directory */ 313 314 va = section_free; 315 316 startpa = bpa & ~L1_S_OFFSET; 317 endpa = (bpa + size) & ~L1_S_OFFSET; 318 if ((bpa + size) & L1_S_OFFSET) 319 endpa += L1_S_SIZE; 320 321 *bshp = (bus_space_handle_t)(va + (bpa - startpa)); 322 323 for (pa = startpa; pa < endpa; pa += L1_S_SIZE, va += L1_S_SIZE) 324 pmap_map_section((vaddr_t)pagedir, va, pa, 325 PROT_READ | PROT_WRITE, PTE_NOCACHE); 326 327 cpu_tlb_flushD(); 328 329 section_free = va; 330 331 return 0; 332 } 333 334 static void 335 copy_io_area_map(pd_entry_t *new_pd) 336 { 337 pd_entry_t *cur_pd = read_ttb(); 338 vaddr_t va; 339 340 for (va = MACHINE_IO_AREA_VBASE; 341 (cur_pd[va>>L1_S_SHIFT] & L1_TYPE_MASK) == L1_TYPE_S; 342 va += L1_S_SIZE) { 343 344 new_pd[va>>L1_S_SHIFT] = cur_pd[va>>L1_S_SHIFT]; 345 if (va == (ARM_VECTORS_HIGH & ~(0x00400000 - 1))) 346 break; /* STUPID */ 347 348 } 349 } 350 351 /* 352 * u_int initarm(...) 353 * 354 * Initial entry point on startup. This gets called before main() is 355 * entered. 356 * It should be responsible for setting up everything that must be 357 * in place when main is called. 358 * This includes 359 * Taking a copy of the FDT. 360 * Initialising the physical console so characters can be printed. 361 * Setting up page tables for the kernel. 362 */ 363 u_int 364 initarm(void *arg0, void *arg1, void *arg2, paddr_t loadaddr) 365 { 366 int loop, loop1, i, physsegs = VM_PHYSSEG_MAX; 367 u_int l1pagetable; 368 pv_addr_t kernel_l1pt; 369 pv_addr_t fdt; 370 struct fdt_reg reg; 371 paddr_t memstart; 372 psize_t memsize; 373 paddr_t memend; 374 void *config; 375 size_t size; 376 void *node; 377 extern uint32_t esym; /* &_end if no symbols are loaded */ 378 379 /* early bus_space_map support */ 380 struct bus_space tmp_bs_tag; 381 int (*map_func_save)(void *, uint64_t, bus_size_t, int, 382 bus_space_handle_t *); 383 384 if (arg0) 385 esym = (uint32_t)arg0; 386 387 board_id = (uint32_t)arg1; 388 /* 389 * u-boot has decided the top four bits are 390 * 'compatibility revision' for sunxi 391 */ 392 if (board_id != 0xffffffff) 393 board_id &= 0x0fffffff; 394 395 /* 396 * Heads up ... Setup the CPU / MMU / TLB functions 397 */ 398 if (set_cpufuncs()) 399 panic("cpu not recognized!"); 400 401 /* 402 * Temporarily replace bus_space_map() functions so that 403 * console devices can get mapped. 404 */ 405 tmp_bs_tag = armv7_bs_tag; 406 map_func_save = armv7_bs_tag.bs_map; 407 armv7_bs_tag.bs_map = bootstrap_bs_map; 408 tmp_bs_tag.bs_map = bootstrap_bs_map; 409 410 /* 411 * Now, map the FDT area. 412 * 413 * As we don't know the size of a possible FDT, map the size of a 414 * typical bootstrap bs map. The FDT might not be aligned, so this 415 * might take up to two L1_S_SIZEd mappings. 416 * 417 * XXX: There's (currently) no way to unmap a bootstrap mapping, so 418 * we might lose a bit of the bootstrap address space. 419 */ 420 bootstrap_bs_map(NULL, (bus_addr_t)arg2, L1_S_SIZE, 0, 421 (bus_space_handle_t *)&config); 422 423 if (!fdt_init(config) || fdt_get_size(config) == 0) 424 panic("initarm: no FDT"); 425 426 node = fdt_find_node("/chosen"); 427 if (node != NULL) { 428 char *prop; 429 int len; 430 static uint8_t lladdr[6]; 431 432 len = fdt_node_property(node, "bootargs", &prop); 433 if (len > 0) 434 process_kernel_args(prop); 435 436 len = fdt_node_property(node, "openbsd,bootduid", &prop); 437 if (len == sizeof(bootduid)) 438 memcpy(bootduid, prop, sizeof(bootduid)); 439 440 len = fdt_node_property(node, "openbsd,bootmac", &prop); 441 if (len == sizeof(lladdr)) { 442 memcpy(lladdr, prop, sizeof(lladdr)); 443 bootmac = lladdr; 444 } 445 } 446 447 node = fdt_find_node("/memory"); 448 if (node == NULL || fdt_get_reg(node, 0, ®)) 449 panic("initarm: no memory specificed"); 450 451 memstart = reg.addr; 452 memsize = reg.size; 453 physical_start = reg.addr; 454 physical_end = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 455 456 platform_init(); 457 458 /* setup a serial console for very early boot */ 459 consinit(); 460 461 /* Talk to the user */ 462 printf("\nOpenBSD/armv7 booting ...\n"); 463 464 printf("arg0 %p arg1 %p arg2 %p\n", arg0, arg1, arg2); 465 466 #ifdef RAMDISK_HOOKS 467 boothowto |= RB_DFLTROOT; 468 #endif /* RAMDISK_HOOKS */ 469 470 physical_freestart = (((unsigned long)esym - KERNEL_TEXT_BASE + 0xfff) & ~0xfff) + loadaddr; 471 physical_freeend = MIN((uint64_t)physical_end, (paddr_t)-PAGE_SIZE); 472 473 physmem = (physical_end - physical_start) / PAGE_SIZE; 474 475 #ifdef DEBUG 476 /* Tell the user about the memory */ 477 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 478 physical_start, physical_end - 1); 479 #endif 480 481 /* 482 * Okay, the kernel starts 2MB in from the bottom of physical 483 * memory. We are going to allocate our bootstrap pages downwards 484 * from there. 485 * 486 * We need to allocate some fixed page tables to get the kernel 487 * going. We allocate one page directory and a number of page 488 * tables and store the physical addresses in the kernel_pt_table 489 * array. 490 * 491 * The kernel page directory must be on a 16K boundary. The page 492 * tables must be on 4K bounaries. What we do is allocate the 493 * page directory on the first 16K boundary that we encounter, and 494 * the page tables on 4K boundaries otherwise. Since we allocate 495 * at least 3 L2 page tables, we are guaranteed to encounter at 496 * least one 16K aligned region. 497 */ 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("Allocating page tables\n"); 501 #endif 502 503 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 504 505 #ifdef VERBOSE_INIT_ARM 506 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 507 physical_freestart, free_pages, free_pages); 508 #endif 509 510 /* Define a macro to simplify memory allocation */ 511 #define valloc_pages(var, np) \ 512 alloc_pages((var).pv_pa, (np)); \ 513 (var).pv_va = KERNEL_BASE + (var).pv_pa - loadaddr; 514 515 #define alloc_pages(var, np) \ 516 (var) = physical_freestart; \ 517 physical_freestart += ((np) * PAGE_SIZE); \ 518 if (physical_freeend < physical_freestart) \ 519 panic("initarm: out of memory"); \ 520 free_pages -= (np); \ 521 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 522 523 loop1 = 0; 524 kernel_l1pt.pv_pa = 0; 525 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 526 /* Are we 16KB aligned for an L1 ? */ 527 if (((physical_freestart) & (L1_TABLE_SIZE - 1)) == 0 528 && kernel_l1pt.pv_pa == 0) { 529 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 530 } else { 531 valloc_pages(kernel_pt_table[loop1], 532 L2_TABLE_SIZE / PAGE_SIZE); 533 ++loop1; 534 } 535 } 536 537 /* This should never be able to happen but better confirm that. */ 538 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 539 panic("initarm: Failed to align the kernel page directory"); 540 541 /* 542 * Allocate a page for the system page mapped to V0x00000000 543 * This page will just contain the system vectors and can be 544 * shared by all processes. 545 */ 546 vector_page = ARM_VECTORS_HIGH; 547 alloc_pages(systempage.pv_pa, 1); 548 systempage.pv_va = vector_page; 549 550 /* Allocate stacks for all modes */ 551 valloc_pages(irqstack, IRQ_STACK_SIZE); 552 valloc_pages(abtstack, ABT_STACK_SIZE); 553 valloc_pages(undstack, UND_STACK_SIZE); 554 valloc_pages(kernelstack, UPAGES); 555 556 /* Allocate enough pages for cleaning the Mini-Data cache. */ 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 560 irqstack.pv_va); 561 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 562 abtstack.pv_va); 563 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 564 undstack.pv_va); 565 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 566 kernelstack.pv_va); 567 #endif 568 569 /* 570 * Allocate pages for an FDT copy. 571 */ 572 size = fdt_get_size(config); 573 valloc_pages(fdt, round_page(size) / PAGE_SIZE); 574 memcpy((void *)fdt.pv_pa, config, size); 575 576 /* 577 * XXX Defer this to later so that we can reclaim the memory 578 */ 579 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 580 581 /* 582 * Ok we have allocated physical pages for the primary kernel 583 * page tables 584 */ 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 588 #endif 589 590 /* 591 * Now we start construction of the L1 page table 592 * We start by mapping the L2 page tables into the L1. 593 * This means that we can replace L1 mappings later on if necessary 594 */ 595 l1pagetable = kernel_l1pt.pv_pa; 596 597 /* Map the L2 pages tables in the L1 page table */ 598 pmap_link_l2pt(l1pagetable, vector_page & ~(0x00400000 - 1), 599 &kernel_pt_table[KERNEL_PT_SYS]); 600 601 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 602 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 603 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 604 605 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 606 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 607 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 608 609 /* update the top of the kernel VM */ 610 pmap_curmaxkvaddr = 611 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("Mapping kernel\n"); 615 #endif 616 617 /* Now we fill in the L2 pagetable for the kernel static code/data */ 618 { 619 extern char __text_start[], _etext[]; 620 extern char __rodata_start[], _erodata[]; 621 size_t textsize = (u_int32_t) (_etext - __text_start); 622 size_t rodatasize = (u_int32_t) (_erodata - __rodata_start); 623 size_t totalsize = esym - (u_int32_t)__text_start; 624 u_int logical; 625 626 textsize = (textsize + PGOFSET) & ~PGOFSET; 627 rodatasize = (rodatasize + PGOFSET) & ~PGOFSET; 628 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 629 630 logical = 0x00300000; /* offset of kernel in RAM */ 631 632 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 633 loadaddr + logical, textsize, 634 PROT_READ | PROT_EXEC, PTE_CACHE); 635 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 636 loadaddr + logical, rodatasize, 637 PROT_READ, PTE_CACHE); 638 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 639 loadaddr + logical, totalsize - (textsize + rodatasize), 640 PROT_READ | PROT_WRITE, PTE_CACHE); 641 } 642 643 #ifdef VERBOSE_INIT_ARM 644 printf("Constructing L2 page tables\n"); 645 #endif 646 647 /* Map the stack pages */ 648 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 649 IRQ_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 650 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 651 ABT_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 652 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 653 UND_STACK_SIZE * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 654 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 655 UPAGES * PAGE_SIZE, PROT_READ | PROT_WRITE, PTE_CACHE); 656 657 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 658 L1_TABLE_SIZE, PROT_READ | PROT_WRITE, PTE_PAGETABLE); 659 660 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 661 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 662 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 663 PROT_READ | PROT_WRITE, PTE_PAGETABLE); 664 } 665 666 /* Map the Mini-Data cache clean area. */ 667 668 /* Map the vector page. */ 669 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 670 PROT_READ | PROT_WRITE, PTE_CACHE); 671 672 /* Map the FDT. */ 673 pmap_map_chunk(l1pagetable, fdt.pv_va, fdt.pv_pa, 674 round_page(fdt_get_size((void *)fdt.pv_pa)), 675 PROT_READ | PROT_WRITE, PTE_CACHE); 676 677 /* 678 * map integrated peripherals at same address in l1pagetable 679 * so that we can continue to use console. 680 */ 681 copy_io_area_map((pd_entry_t *)l1pagetable); 682 683 /* 684 * Now we have the real page tables in place so we can switch to them. 685 * Once this is done we will be running with the REAL kernel page 686 * tables. 687 */ 688 setttb(kernel_l1pt.pv_pa); 689 cpu_tlb_flushID(); 690 691 /* 692 * Moved from cpu_startup() as data_abort_handler() references 693 * this during uvm init 694 */ 695 proc0paddr = (struct user *)kernelstack.pv_va; 696 proc0.p_addr = proc0paddr; 697 698 arm32_vector_init(vector_page, ARM_VEC_ALL); 699 700 /* 701 * Pages were allocated during the secondary bootstrap for the 702 * stacks for different CPU modes. 703 * We must now set the r13 registers in the different CPU modes to 704 * point to these stacks. 705 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 706 * of the stack memory. 707 */ 708 709 set_stackptr(PSR_IRQ32_MODE, 710 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 711 set_stackptr(PSR_ABT32_MODE, 712 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 713 set_stackptr(PSR_UND32_MODE, 714 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 715 716 /* 717 * Well we should set a data abort handler. 718 * Once things get going this will change as we will need a proper 719 * handler. 720 * Until then we will use a handler that just panics but tells us 721 * why. 722 * Initialisation of the vectors will just panic on a data abort. 723 * This just fills in a slighly better one. 724 */ 725 726 data_abort_handler_address = (u_int)data_abort_handler; 727 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 728 undefined_handler_address = (u_int)undefinedinstruction_bounce; 729 730 /* Now we can reinit the FDT, using the virtual address. */ 731 fdt_init((void *)fdt.pv_va); 732 733 /* Initialise the undefined instruction handlers */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("undefined "); 736 #endif 737 undefined_init(); 738 739 /* Load memory into UVM. */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("page "); 742 #endif 743 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 744 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 745 atop(physical_freestart), atop(physical_freeend), 0); 746 747 if (physical_start < loadaddr) { 748 uvm_page_physload(atop(physical_start), atop(loadaddr), 749 atop(physical_start), atop(loadaddr), 0); 750 physsegs--; 751 } 752 753 node = fdt_find_node("/memory"); 754 for (i = 1; i < physsegs; i++) { 755 if (fdt_get_reg(node, i, ®)) 756 break; 757 if (reg.size == 0) 758 continue; 759 760 memstart = reg.addr; 761 memend = MIN(reg.addr + reg.size, (paddr_t)-PAGE_SIZE); 762 physmem += (memend - memstart) / PAGE_SIZE; 763 uvm_page_physload(atop(memstart), atop(memend), 764 atop(memstart), atop(memend), 0); 765 } 766 767 /* Boot strap pmap telling it where the kernel page table is */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("pmap "); 770 #endif 771 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 772 KERNEL_VM_BASE + KERNEL_VM_SIZE); 773 774 vector_page_setprot(PROT_READ | PROT_EXEC); 775 776 /* 777 * Restore proper bus_space operation, now that pmap is initialized. 778 */ 779 armv7_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 static int 863 atoi(const char *s) 864 { 865 int n, neg; 866 867 n = 0; 868 neg = 0; 869 870 while (*s == '-') { 871 s++; 872 neg = !neg; 873 } 874 875 while (*s != '\0') { 876 if (*s < '0' || *s > '9') 877 break; 878 879 n = (10 * n) + (*s - '0'); 880 s++; 881 } 882 883 return (neg ? -n : n); 884 } 885 886 void * 887 fdt_find_cons(const char *name) 888 { 889 char *alias = "serial0"; 890 char buf[128]; 891 char *stdout = NULL; 892 char *p; 893 void *node; 894 895 /* First check if "stdout-path" is set. */ 896 node = fdt_find_node("/chosen"); 897 if (node) { 898 if (fdt_node_property(node, "stdout-path", &stdout) > 0) { 899 if (strchr(stdout, ':') != NULL) { 900 strlcpy(buf, stdout, sizeof(buf)); 901 if ((p = strchr(buf, ':')) != NULL) { 902 *p++ = '\0'; 903 stdout_speed = atoi(p); 904 } 905 stdout = buf; 906 } 907 if (stdout[0] != '/') { 908 /* It's an alias. */ 909 alias = stdout; 910 stdout = NULL; 911 } 912 } 913 } 914 915 /* Perform alias lookup if necessary. */ 916 if (stdout == NULL) { 917 node = fdt_find_node("/aliases"); 918 if (node) 919 fdt_node_property(node, alias, &stdout); 920 } 921 922 /* Lookup the physical address of the interface. */ 923 if (stdout) { 924 node = fdt_find_node(stdout); 925 if (node && fdt_is_compatible(node, name)) { 926 stdout_node = OF_finddevice(stdout); 927 return (node); 928 } 929 } 930 931 return (NULL); 932 } 933 934 void 935 consinit(void) 936 { 937 static int consinit_called = 0; 938 939 if (consinit_called != 0) 940 return; 941 942 consinit_called = 1; 943 944 platform_init_cons(); 945 } 946 947 void 948 board_startup(void) 949 { 950 if (boothowto & RB_CONFIG) { 951 #ifdef BOOT_CONFIG 952 user_config(); 953 #else 954 printf("kernel does not support -c; continuing..\n"); 955 #endif 956 } 957 } 958