1 /* $NetBSD: hdlg_machdep.c,v 1.23 2016/12/22 14:47:55 cherry Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Steve C. Woodford for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1997,1998 Mark Brinicombe. 40 * Copyright (c) 1997,1998 Causality Limited. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Mark Brinicombe 54 * for the NetBSD Project. 55 * 4. The name of the company nor the name of the author may be used to 56 * endorse or promote products derived from this software without specific 57 * prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * Machine dependent functions for kernel setup for GigaLANDISK 72 * using RedBoot firmware. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: hdlg_machdep.c,v 1.23 2016/12/22 14:47:55 cherry Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 #include "opt_pmap_debug.h" 81 82 #include <sys/param.h> 83 #include <sys/device.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/exec.h> 87 #include <sys/proc.h> 88 #include <sys/msgbuf.h> 89 #include <sys/reboot.h> 90 #include <sys/termios.h> 91 #include <sys/ksyms.h> 92 #include <sys/bus.h> 93 #include <sys/cpu.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <machine/db_machdep.h> 100 #include <ddb/db_sym.h> 101 #include <ddb/db_extern.h> 102 103 #include <machine/bootconfig.h> 104 #include <arm/locore.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/xscale/i80321reg.h> 110 #include <arm/xscale/i80321var.h> 111 112 #include <dev/pci/ppbreg.h> 113 114 #include <evbarm/hdl_g/hdlgreg.h> 115 #include <evbarm/hdl_g/hdlgvar.h> 116 #include <evbarm/hdl_g/obiovar.h> 117 118 #include "ksyms.h" 119 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124 /* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128 #define KERNEL_VM_SIZE 0x0C000000 129 130 BootConfig bootconfig; /* Boot config storage */ 131 char *boot_args = NULL; 132 char *boot_file = NULL; 133 134 vaddr_t physical_start; 135 vaddr_t physical_freestart; 136 vaddr_t physical_freeend; 137 vaddr_t physical_end; 138 u_int free_pages; 139 140 /*int debug_flags;*/ 141 #ifndef PMAP_STATIC_L1S 142 int max_processes = 64; /* Default number */ 143 #endif /* !PMAP_STATIC_L1S */ 144 145 pv_addr_t minidataclean; 146 147 paddr_t msgbufphys; 148 149 #ifdef PMAP_DEBUG 150 extern int pmap_debug_level; 151 #endif 152 153 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 154 155 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 156 #define KERNEL_PT_KERNEL_NUM 4 157 158 /* L2 table for mapping i80321 */ 159 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 160 161 /* L2 tables for mapping kernel VM */ 162 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 163 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 164 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 165 166 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 167 168 /* Prototypes */ 169 void consinit(void); 170 171 /* Static device mappings. */ 172 static const struct pmap_devmap hdlg_devmap[] = { 173 /* 174 * Map the on-board devices VA == PA so that we can access them 175 * with the MMU on or off. 176 */ 177 { 178 HDLG_OBIO_BASE, 179 HDLG_OBIO_BASE, 180 HDLG_OBIO_SIZE, 181 VM_PROT_READ|VM_PROT_WRITE, 182 PTE_NOCACHE, 183 }, 184 185 { 186 HDLG_IOW_VBASE, 187 VERDE_OUT_XLATE_IO_WIN0_BASE, 188 VERDE_OUT_XLATE_IO_WIN_SIZE, 189 VM_PROT_READ|VM_PROT_WRITE, 190 PTE_NOCACHE, 191 }, 192 193 { 194 HDLG_80321_VBASE, 195 VERDE_PMMR_BASE, 196 VERDE_PMMR_SIZE, 197 VM_PROT_READ|VM_PROT_WRITE, 198 PTE_NOCACHE, 199 }, 200 201 { 202 0, 203 0, 204 0, 205 0, 206 0, 207 } 208 }; 209 210 static void 211 hardclock_hook(void) 212 { 213 214 /* Nothing to do */ 215 } 216 217 /* 218 * u_int initarm(...) 219 * 220 * Initial entry point on startup. This gets called before main() is 221 * entered. 222 * It should be responsible for setting up everything that must be 223 * in place when main is called. 224 * This includes 225 * Taking a copy of the boot configuration structure. 226 * Initialising the physical console so characters can be printed. 227 * Setting up page tables for the kernel 228 * Relocating the kernel to the bottom of physical memory 229 */ 230 u_int 231 initarm(void *arg) 232 { 233 extern vaddr_t xscale_cache_clean_addr; 234 #ifdef DIAGNOSTIC 235 extern vsize_t xscale_minidata_clean_size; 236 #endif 237 int loop; 238 int loop1; 239 u_int l1pagetable; 240 paddr_t memstart; 241 psize_t memsize; 242 243 /* Calibrate the delay loop. */ 244 i80321_calibrate_delay(); 245 i80321_hardclock_hook = hardclock_hook; 246 247 /* 248 * Since we map the on-board devices VA==PA, and the kernel 249 * is running VA==PA, it's possible for us to initialize 250 * the console now. 251 */ 252 consinit(); 253 254 #ifdef VERBOSE_INIT_ARM 255 /* Talk to the user */ 256 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 257 #endif 258 259 /* 260 * Heads up ... Setup the CPU / MMU / TLB functions 261 */ 262 if (set_cpufuncs()) 263 panic("CPU not recognized!"); 264 265 /* 266 * We are currently running with the MMU enabled and the 267 * entire address space mapped VA==PA, except for the 268 * first 64M of RAM is also double-mapped at 0xc0000000. 269 * There is an L1 page table at 0xa0004000. 270 */ 271 272 /* 273 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 274 * registers. 275 */ 276 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 277 &memstart, &memsize); 278 279 #ifdef VERBOSE_INIT_ARM 280 printf("initarm: Configuring system ...\n"); 281 #endif 282 283 /* Fake bootconfig structure for the benefit of pmap.c */ 284 /* XXX must make the memory description h/w independent */ 285 bootconfig.dramblocks = 1; 286 bootconfig.dram[0].address = memstart; 287 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 288 289 /* 290 * Set up the variables that define the availablilty of 291 * physical memory. For now, we're going to set 292 * physical_freestart to 0xa0200000 (where the kernel 293 * was loaded), and allocate the memory we need downwards. 294 * If we get too close to the L1 table that we set up, we 295 * will panic. We will update physical_freestart and 296 * physical_freeend later to reflect what pmap_bootstrap() 297 * wants to see. 298 * 299 * XXX pmap_bootstrap() needs an enema. 300 */ 301 physical_start = bootconfig.dram[0].address; 302 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 303 304 physical_freestart = 0xa0009000UL; 305 physical_freeend = 0xa0200000UL; 306 307 physmem = (physical_end - physical_start) / PAGE_SIZE; 308 309 #ifdef VERBOSE_INIT_ARM 310 /* Tell the user about the memory */ 311 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 312 physical_start, physical_end - 1); 313 #endif 314 315 /* 316 * Okay, the kernel starts 2MB in from the bottom of physical 317 * memory. We are going to allocate our bootstrap pages downwards 318 * from there. 319 * 320 * We need to allocate some fixed page tables to get the kernel 321 * going. We allocate one page directory and a number of page 322 * tables and store the physical addresses in the kernel_pt_table 323 * array. 324 * 325 * The kernel page directory must be on a 16K boundary. The page 326 * tables must be on 4K boundaries. What we do is allocate the 327 * page directory on the first 16K boundary that we encounter, and 328 * the page tables on 4K boundaries otherwise. Since we allocate 329 * at least 3 L2 page tables, we are guaranteed to encounter at 330 * least one 16K aligned region. 331 */ 332 333 #ifdef VERBOSE_INIT_ARM 334 printf("Allocating page tables\n"); 335 #endif 336 337 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 338 339 #ifdef VERBOSE_INIT_ARM 340 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 341 physical_freestart, free_pages, free_pages); 342 #endif 343 344 /* Define a macro to simplify memory allocation */ 345 #define valloc_pages(var, np) \ 346 alloc_pages((var).pv_pa, (np)); \ 347 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 348 349 #define alloc_pages(var, np) \ 350 physical_freeend -= ((np) * PAGE_SIZE); \ 351 if (physical_freeend < physical_freestart) \ 352 panic("initarm: out of memory"); \ 353 (var) = physical_freeend; \ 354 free_pages -= (np); \ 355 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 356 357 loop1 = 0; 358 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 359 /* Are we 16KB aligned for an L1 ? */ 360 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 361 && kernel_l1pt.pv_pa == 0) { 362 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 363 } else { 364 valloc_pages(kernel_pt_table[loop1], 365 L2_TABLE_SIZE / PAGE_SIZE); 366 ++loop1; 367 } 368 } 369 370 /* This should never be able to happen but better confirm that. */ 371 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 372 panic("initarm: Failed to align the kernel page directory"); 373 374 /* 375 * Allocate a page for the system page mapped to V0x00000000 376 * This page will just contain the system vectors and can be 377 * shared by all processes. 378 */ 379 alloc_pages(systempage.pv_pa, 1); 380 381 /* Allocate stacks for all modes */ 382 valloc_pages(irqstack, IRQ_STACK_SIZE); 383 valloc_pages(abtstack, ABT_STACK_SIZE); 384 valloc_pages(undstack, UND_STACK_SIZE); 385 valloc_pages(kernelstack, UPAGES); 386 387 /* Allocate enough pages for cleaning the Mini-Data cache. */ 388 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 389 valloc_pages(minidataclean, 1); 390 391 #ifdef VERBOSE_INIT_ARM 392 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 393 irqstack.pv_va); 394 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 395 abtstack.pv_va); 396 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 397 undstack.pv_va); 398 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 399 kernelstack.pv_va); 400 #endif 401 402 /* 403 * XXX Defer this to later so that we can reclaim the memory 404 * XXX used by the RedBoot page tables. 405 */ 406 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 407 408 /* 409 * Ok we have allocated physical pages for the primary kernel 410 * page tables 411 */ 412 413 #ifdef VERBOSE_INIT_ARM 414 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 415 #endif 416 417 /* 418 * Now we start construction of the L1 page table 419 * We start by mapping the L2 page tables into the L1. 420 * This means that we can replace L1 mappings later on if necessary 421 */ 422 l1pagetable = kernel_l1pt.pv_pa; 423 424 /* Map the L2 pages tables in the L1 page table */ 425 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 426 &kernel_pt_table[KERNEL_PT_SYS]); 427 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 428 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 429 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 430 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 431 &kernel_pt_table[KERNEL_PT_IOPXS]); 432 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 433 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 434 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 435 436 /* update the top of the kernel VM */ 437 pmap_curmaxkvaddr = 438 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 439 440 #ifdef VERBOSE_INIT_ARM 441 printf("Mapping kernel\n"); 442 #endif 443 444 /* Now we fill in the L2 pagetable for the kernel static code/data */ 445 { 446 extern char etext[], _end[]; 447 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 448 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 449 u_int logical; 450 451 textsize = (textsize + PGOFSET) & ~PGOFSET; 452 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 453 454 logical = 0x00200000; /* offset of kernel in RAM */ 455 456 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 457 physical_start + logical, textsize, 458 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 459 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 460 physical_start + logical, totalsize - textsize, 461 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 462 } 463 464 #ifdef VERBOSE_INIT_ARM 465 printf("Constructing L2 page tables\n"); 466 #endif 467 468 /* Map the stack pages */ 469 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 470 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 471 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 472 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 473 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 474 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 475 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 476 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 477 478 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 479 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 480 481 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 482 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 483 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 484 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 485 } 486 487 /* Map the Mini-Data cache clean area. */ 488 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 489 minidataclean.pv_pa); 490 491 /* Map the vector page. */ 492 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 493 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 494 495 /* Map the statically mapped devices. */ 496 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 497 498 /* 499 * Give the XScale global cache clean code an appropriately 500 * sized chunk of unmapped VA space starting at 0xff000000 501 * (our device mappings end before this address). 502 */ 503 xscale_cache_clean_addr = 0xff000000U; 504 505 /* 506 * Now we have the real page tables in place so we can switch to them. 507 * Once this is done we will be running with the REAL kernel page 508 * tables. 509 */ 510 511 /* 512 * Update the physical_freestart/physical_freeend/free_pages 513 * variables. 514 */ 515 { 516 extern char _end[]; 517 518 physical_freestart = physical_start + 519 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 520 KERNEL_BASE); 521 physical_freeend = physical_end; 522 free_pages = 523 (physical_freeend - physical_freestart) / PAGE_SIZE; 524 } 525 526 /* Switch tables */ 527 #ifdef VERBOSE_INIT_ARM 528 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 529 physical_freestart, free_pages, free_pages); 530 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 531 #endif 532 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 533 cpu_setttb(kernel_l1pt.pv_pa, true); 534 cpu_tlb_flushID(); 535 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 536 537 /* 538 * Moved from cpu_startup() as data_abort_handler() references 539 * this during uvm init 540 */ 541 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("done!\n"); 545 #endif 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("bootstrap done.\n"); 549 #endif 550 551 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 552 553 /* 554 * Pages were allocated during the secondary bootstrap for the 555 * stacks for different CPU modes. 556 * We must now set the r13 registers in the different CPU modes to 557 * point to these stacks. 558 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 559 * of the stack memory. 560 */ 561 #ifdef VERBOSE_INIT_ARM 562 printf("init subsystems: stacks "); 563 #endif 564 565 set_stackptr(PSR_IRQ32_MODE, 566 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 567 set_stackptr(PSR_ABT32_MODE, 568 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 569 set_stackptr(PSR_UND32_MODE, 570 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 571 572 /* 573 * Well we should set a data abort handler. 574 * Once things get going this will change as we will need a proper 575 * handler. 576 * Until then we will use a handler that just panics but tells us 577 * why. 578 * Initialisation of the vectors will just panic on a data abort. 579 * This just fills in a slightly better one. 580 */ 581 #ifdef VERBOSE_INIT_ARM 582 printf("vectors "); 583 #endif 584 data_abort_handler_address = (u_int)data_abort_handler; 585 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 586 undefined_handler_address = (u_int)undefinedinstruction_bounce; 587 588 /* Initialise the undefined instruction handlers */ 589 #ifdef VERBOSE_INIT_ARM 590 printf("undefined "); 591 #endif 592 undefined_init(); 593 594 /* Load memory into UVM. */ 595 #ifdef VERBOSE_INIT_ARM 596 printf("page "); 597 #endif 598 uvm_md_init(); 599 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 600 atop(physical_freestart), atop(physical_freeend), 601 VM_FREELIST_DEFAULT); 602 603 /* Boot strap pmap telling it where the kernel page table is */ 604 #ifdef VERBOSE_INIT_ARM 605 printf("pmap "); 606 #endif 607 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 608 609 /* Setup the IRQ system */ 610 #ifdef VERBOSE_INIT_ARM 611 printf("irq "); 612 #endif 613 i80321_intr_init(); 614 615 #ifdef VERBOSE_INIT_ARM 616 printf("done.\n"); 617 #endif 618 619 #ifdef BOOTHOWTO 620 boothowto = BOOTHOWTO; 621 #endif 622 623 #ifdef DDB 624 db_machine_init(); 625 if (boothowto & RB_KDB) 626 Debugger(); 627 #endif 628 629 /* We return the new stack pointer address */ 630 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 631 } 632 633 /* 634 * void cpu_reboot(int howto, char *bootstr) 635 * 636 * Reboots the system 637 * 638 * Deal with any syncing, unmounting, dumping and shutdown hooks, 639 * then reset the CPU. 640 */ 641 void 642 cpu_reboot(int howto, char *bootstr) 643 { 644 645 /* 646 * If we are still cold then hit the air brakes 647 * and crash to earth fast 648 */ 649 if (cold) { 650 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 651 howto |= RB_HALT; 652 goto haltsys; 653 } 654 655 /* Disable console buffering */ 656 657 /* 658 * If RB_NOSYNC was not specified sync the discs. 659 * Note: Unless cold is set to 1 here, syslogd will die during the 660 * unmount. It looks like syslogd is getting woken up only to find 661 * that it cannot page part of the binary in as the filesystem has 662 * been unmounted. 663 */ 664 if ((howto & RB_NOSYNC) == 0) { 665 bootsync(); 666 /*resettodr();*/ 667 } 668 669 /* wait 1s */ 670 delay(1 * 1000 * 1000); 671 672 /* Say NO to interrupts */ 673 splhigh(); 674 675 /* Do a dump if requested. */ 676 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 677 dumpsys(); 678 } 679 680 haltsys: 681 /* Run any shutdown hooks */ 682 doshutdownhooks(); 683 684 pmf_system_shutdown(boothowto); 685 686 /* Make sure IRQ's are disabled */ 687 IRQdisable; 688 689 if (howto & RB_HALT) { 690 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 691 delay(3 * 1000 * 1000); /* wait 3s */ 692 693 printf("SHUTDOWN FAILED!\n"); 694 printf("The operating system has halted.\n"); 695 printf("Please press any key to reboot.\n\n"); 696 cngetc(); 697 } 698 699 printf("rebooting...\n\r"); 700 701 (void)disable_interrupts(I32_bit|F32_bit); 702 cpu_idcache_wbinv_all(); 703 cpu_drain_writebuf(); 704 705 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 706 delay(1 * 1000 * 1000); /* wait 1s */ 707 708 /* ...and if that didn't work, just croak. */ 709 printf("RESET FAILED!\n"); 710 for (;;) { 711 continue; 712 } 713 } 714 715 /* 716 * console 717 */ 718 #include "com.h" 719 #if NCOM > 0 720 #include <dev/ic/comreg.h> 721 #include <dev/ic/comvar.h> 722 #endif 723 724 /* 725 * Define the default console speed for the board. This is generally 726 * what the firmware provided with the board defaults to. 727 */ 728 #ifndef CONSPEED 729 #define CONSPEED B115200 730 #endif /* ! CONSPEED */ 731 732 #ifndef CONUNIT 733 #define CONUNIT 0 734 #endif 735 736 #ifndef CONMODE 737 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 738 #endif 739 740 int comcnspeed = CONSPEED; 741 int comcnmode = CONMODE; 742 int comcnunit = CONUNIT; 743 744 #if KGDB 745 #ifndef KGDB_DEVNAME 746 #error Must define KGDB_DEVNAME 747 #endif 748 const char kgdb_devname[] = KGDB_DEVNAME; 749 750 #ifndef KGDB_DEVADDR 751 #error Must define KGDB_DEVADDR 752 #endif 753 unsigned long kgdb_devaddr = KGDB_DEVADDR; 754 755 #ifndef KGDB_DEVRATE 756 #define KGDB_DEVRATE CONSPEED 757 #endif 758 int kgdb_devrate = KGDB_DEVRATE; 759 760 #ifndef KGDB_DEVMODE 761 #define KGDB_DEVMODE CONMODE 762 #endif 763 int kgdb_devmode = KGDB_DEVMODE; 764 #endif /* KGDB */ 765 766 void 767 consinit(void) 768 { 769 static const bus_addr_t comcnaddrs[] = { 770 HDLG_UART1, /* com0 */ 771 }; 772 static int consinit_called; 773 774 if (consinit_called) 775 return; 776 consinit_called = 1; 777 778 /* 779 * Console devices are mapped VA==PA. Our devmap reflects 780 * this, so register it now so drivers can map the console 781 * device. 782 */ 783 pmap_devmap_register(hdlg_devmap); 784 785 #if NCOM > 0 786 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 787 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 788 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 789 #else 790 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 791 #endif 792 #if KGDB 793 #if NCOM > 0 794 if (strcmp(kgdb_devname, "com") == 0) { 795 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 796 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 797 } 798 #endif /* NCOM > 0 */ 799 #endif /* KGDB */ 800 } 801