1 /* $NetBSD: hdlg_machdep.c,v 1.35 2023/10/12 11:33:38 skrll 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 1.35 2023/10/12 11:33:38 skrll Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.h" 81 #include "opt_kgdb.h" 82 83 #include <sys/param.h> 84 #include <sys/device.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/exec.h> 88 #include <sys/proc.h> 89 #include <sys/msgbuf.h> 90 #include <sys/reboot.h> 91 #include <sys/termios.h> 92 #include <sys/ksyms.h> 93 #include <sys/bus.h> 94 #include <sys/cpu.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/db_machdep.h> 101 #include <ddb/db_sym.h> 102 #include <ddb/db_extern.h> 103 104 #include <machine/bootconfig.h> 105 #include <arm/locore.h> 106 #include <arm/undefined.h> 107 108 #include <arm/arm32/machdep.h> 109 110 #include <arm/xscale/i80321reg.h> 111 #include <arm/xscale/i80321var.h> 112 113 #include <dev/pci/ppbreg.h> 114 115 #include <evbarm/hdl_g/hdlgreg.h> 116 #include <evbarm/hdl_g/hdlgvar.h> 117 #include <evbarm/hdl_g/obiovar.h> 118 119 #include "ksyms.h" 120 121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 124 125 /* 126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 128 */ 129 #define KERNEL_VM_SIZE 0x0C000000 130 131 BootConfig bootconfig; /* Boot config storage */ 132 char *boot_args = NULL; 133 char *boot_file = NULL; 134 135 vaddr_t physical_start; 136 vaddr_t physical_freestart; 137 vaddr_t physical_freeend; 138 vaddr_t physical_end; 139 u_int free_pages; 140 141 /*int debug_flags;*/ 142 #ifndef PMAP_STATIC_L1S 143 int max_processes = 64; /* Default number */ 144 #endif /* !PMAP_STATIC_L1S */ 145 146 pv_addr_t minidataclean; 147 148 paddr_t msgbufphys; 149 150 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 151 152 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 153 #define KERNEL_PT_KERNEL_NUM 4 154 155 /* L2 table for mapping i80321 */ 156 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 157 158 /* L2 tables for mapping kernel VM */ 159 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 160 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 161 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 162 163 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 164 165 /* Prototypes */ 166 void consinit(void); 167 168 /* Static device mappings. */ 169 static const struct pmap_devmap hdlg_devmap[] = { 170 /* 171 * Map the on-board devices VA == PA so that we can access them 172 * with the MMU on or off. 173 */ 174 DEVMAP_ENTRY( 175 HDLG_OBIO_BASE, 176 HDLG_OBIO_BASE, 177 HDLG_OBIO_SIZE 178 ), 179 180 DEVMAP_ENTRY( 181 HDLG_IOW_VBASE, 182 VERDE_OUT_XLATE_IO_WIN0_BASE, 183 VERDE_OUT_XLATE_IO_WIN_SIZE 184 ), 185 186 DEVMAP_ENTRY( 187 HDLG_80321_VBASE, 188 VERDE_PMMR_BASE, 189 VERDE_PMMR_SIZE 190 ), 191 192 DEVMAP_ENTRY_END 193 }; 194 195 static void 196 hardclock_hook(void) 197 { 198 199 /* Nothing to do */ 200 } 201 202 /* 203 * vaddr_t initarm(...) 204 * 205 * Initial entry point on startup. This gets called before main() is 206 * entered. 207 * It should be responsible for setting up everything that must be 208 * in place when main is called. 209 * This includes 210 * Taking a copy of the boot configuration structure. 211 * Initialising the physical console so characters can be printed. 212 * Setting up page tables for the kernel 213 * Relocating the kernel to the bottom of physical memory 214 */ 215 vaddr_t 216 initarm(void *arg) 217 { 218 int loop; 219 int loop1; 220 u_int l1pagetable; 221 paddr_t memstart; 222 psize_t memsize; 223 224 /* Calibrate the delay loop. */ 225 i80321_calibrate_delay(); 226 i80321_hardclock_hook = hardclock_hook; 227 228 /* 229 * Since we map the on-board devices VA==PA, and the kernel 230 * is running VA==PA, it's possible for us to initialize 231 * the console now. 232 */ 233 consinit(); 234 235 #ifdef VERBOSE_INIT_ARM 236 /* Talk to the user */ 237 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 238 #endif 239 240 /* 241 * Heads up ... Setup the CPU / MMU / TLB functions 242 */ 243 if (set_cpufuncs()) 244 panic("CPU not recognized!"); 245 246 /* 247 * We are currently running with the MMU enabled and the 248 * entire address space mapped VA==PA, except for the 249 * first 64M of RAM is also double-mapped at 0xc0000000. 250 * There is an L1 page table at 0xa0004000. 251 */ 252 253 /* 254 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 255 * registers. 256 */ 257 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 258 &memstart, &memsize); 259 260 #ifdef VERBOSE_INIT_ARM 261 printf("initarm: Configuring system ...\n"); 262 #endif 263 264 /* Fake bootconfig structure for the benefit of pmap.c */ 265 /* XXX must make the memory description h/w independent */ 266 bootconfig.dramblocks = 1; 267 bootconfig.dram[0].address = memstart; 268 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 269 270 /* 271 * Set up the variables that define the availability of 272 * physical memory. For now, we're going to set 273 * physical_freestart to 0xa0200000 (where the kernel 274 * was loaded), and allocate the memory we need downwards. 275 * If we get too close to the L1 table that we set up, we 276 * will panic. We will update physical_freestart and 277 * physical_freeend later to reflect what pmap_bootstrap() 278 * wants to see. 279 * 280 * XXX pmap_bootstrap() needs an enema. 281 */ 282 physical_start = bootconfig.dram[0].address; 283 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 284 285 physical_freestart = 0xa0009000UL; 286 physical_freeend = 0xa0200000UL; 287 288 physmem = (physical_end - physical_start) / PAGE_SIZE; 289 290 #ifdef VERBOSE_INIT_ARM 291 /* Tell the user about the memory */ 292 printf("physmemory: %ld pages at 0x%08lx -> 0x%08lx\n", physmem, 293 physical_start, physical_end - 1); 294 #endif 295 296 /* 297 * Okay, the kernel starts 2MB in from the bottom of physical 298 * memory. We are going to allocate our bootstrap pages downwards 299 * from there. 300 * 301 * We need to allocate some fixed page tables to get the kernel 302 * going. We allocate one page directory and a number of page 303 * tables and store the physical addresses in the kernel_pt_table 304 * array. 305 * 306 * The kernel page directory must be on a 16K boundary. The page 307 * tables must be on 4K boundaries. What we do is allocate the 308 * page directory on the first 16K boundary that we encounter, and 309 * the page tables on 4K boundaries otherwise. Since we allocate 310 * at least 3 L2 page tables, we are guaranteed to encounter at 311 * least one 16K aligned region. 312 */ 313 314 #ifdef VERBOSE_INIT_ARM 315 printf("Allocating page tables\n"); 316 #endif 317 318 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 319 320 #ifdef VERBOSE_INIT_ARM 321 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 322 physical_freestart, free_pages, free_pages); 323 #endif 324 325 /* Define a macro to simplify memory allocation */ 326 #define valloc_pages(var, np) \ 327 alloc_pages((var).pv_pa, (np)); \ 328 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 329 330 #define alloc_pages(var, np) \ 331 physical_freeend -= ((np) * PAGE_SIZE); \ 332 if (physical_freeend < physical_freestart) \ 333 panic("initarm: out of memory"); \ 334 (var) = physical_freeend; \ 335 free_pages -= (np); \ 336 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 337 338 loop1 = 0; 339 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 340 /* Are we 16KB aligned for an L1 ? */ 341 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 342 && kernel_l1pt.pv_pa == 0) { 343 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 344 } else { 345 valloc_pages(kernel_pt_table[loop1], 346 L2_TABLE_SIZE / PAGE_SIZE); 347 ++loop1; 348 } 349 } 350 351 /* This should never be able to happen but better confirm that. */ 352 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 353 panic("initarm: Failed to align the kernel page directory"); 354 355 /* 356 * Allocate a page for the system page mapped to V0x00000000 357 * This page will just contain the system vectors and can be 358 * shared by all processes. 359 */ 360 alloc_pages(systempage.pv_pa, 1); 361 362 /* Allocate stacks for all modes */ 363 valloc_pages(irqstack, IRQ_STACK_SIZE); 364 valloc_pages(abtstack, ABT_STACK_SIZE); 365 valloc_pages(undstack, UND_STACK_SIZE); 366 valloc_pages(kernelstack, UPAGES); 367 368 /* Allocate enough pages for cleaning the Mini-Data cache. */ 369 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 370 valloc_pages(minidataclean, 1); 371 372 #ifdef VERBOSE_INIT_ARM 373 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 374 irqstack.pv_va); 375 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 376 abtstack.pv_va); 377 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 378 undstack.pv_va); 379 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 380 kernelstack.pv_va); 381 #endif 382 383 /* 384 * XXX Defer this to later so that we can reclaim the memory 385 * XXX used by the RedBoot page tables. 386 */ 387 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 388 389 /* 390 * Ok we have allocated physical pages for the primary kernel 391 * page tables 392 */ 393 394 #ifdef VERBOSE_INIT_ARM 395 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 396 #endif 397 398 /* 399 * Now we start construction of the L1 page table 400 * We start by mapping the L2 page tables into the L1. 401 * This means that we can replace L1 mappings later on if necessary 402 */ 403 l1pagetable = kernel_l1pt.pv_pa; 404 405 /* Map the L2 pages tables in the L1 page table */ 406 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 407 &kernel_pt_table[KERNEL_PT_SYS]); 408 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 409 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 410 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 411 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 412 &kernel_pt_table[KERNEL_PT_IOPXS]); 413 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 414 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 415 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 416 417 /* update the top of the kernel VM */ 418 pmap_curmaxkvaddr = 419 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 420 421 #ifdef VERBOSE_INIT_ARM 422 printf("Mapping kernel\n"); 423 #endif 424 425 /* Now we fill in the L2 pagetable for the kernel static code/data */ 426 { 427 extern char etext[], _end[]; 428 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 429 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 430 u_int logical; 431 432 textsize = (textsize + PGOFSET) & ~PGOFSET; 433 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 434 435 logical = 0x00200000; /* offset of kernel in RAM */ 436 437 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 438 physical_start + logical, textsize, 439 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 440 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 441 physical_start + logical, totalsize - textsize, 442 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 443 } 444 445 #ifdef VERBOSE_INIT_ARM 446 printf("Constructing L2 page tables\n"); 447 #endif 448 449 /* Map the stack pages */ 450 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 451 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 452 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 453 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 454 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 455 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 456 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 457 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 458 459 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 460 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 461 462 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 463 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 464 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 465 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 466 } 467 468 /* Map the Mini-Data cache clean area. */ 469 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 470 minidataclean.pv_pa); 471 472 /* Map the vector page. */ 473 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 474 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 475 476 /* Map the statically mapped devices. */ 477 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 478 479 /* 480 * Give the XScale global cache clean code an appropriately 481 * sized chunk of unmapped VA space starting at 0xff000000 482 * (our device mappings end before this address). 483 */ 484 xscale_cache_clean_addr = 0xff000000U; 485 486 /* 487 * Now we have the real page tables in place so we can switch to them. 488 * Once this is done we will be running with the REAL kernel page 489 * tables. 490 */ 491 492 /* 493 * Update the physical_freestart/physical_freeend/free_pages 494 * variables. 495 */ 496 { 497 extern char _end[]; 498 499 physical_freestart = physical_start + 500 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 501 KERNEL_BASE); 502 physical_freeend = physical_end; 503 free_pages = 504 (physical_freeend - physical_freestart) / PAGE_SIZE; 505 } 506 507 /* Switch tables */ 508 #ifdef VERBOSE_INIT_ARM 509 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 510 physical_freestart, free_pages, free_pages); 511 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 512 #endif 513 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 514 cpu_setttb(kernel_l1pt.pv_pa, true); 515 cpu_tlb_flushID(); 516 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 517 518 /* 519 * Moved from cpu_startup() as data_abort_handler() references 520 * this during uvm init 521 */ 522 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 523 524 #ifdef VERBOSE_INIT_ARM 525 printf("done!\n"); 526 #endif 527 528 #ifdef VERBOSE_INIT_ARM 529 printf("bootstrap done.\n"); 530 #endif 531 532 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 533 534 /* 535 * Pages were allocated during the secondary bootstrap for the 536 * stacks for different CPU modes. 537 * We must now set the r13 registers in the different CPU modes to 538 * point to these stacks. 539 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 540 * of the stack memory. 541 */ 542 #ifdef VERBOSE_INIT_ARM 543 printf("init subsystems: stacks "); 544 #endif 545 546 set_stackptr(PSR_IRQ32_MODE, 547 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 548 set_stackptr(PSR_ABT32_MODE, 549 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 550 set_stackptr(PSR_UND32_MODE, 551 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 552 553 /* 554 * Well we should set a data abort handler. 555 * Once things get going this will change as we will need a proper 556 * handler. 557 * Until then we will use a handler that just panics but tells us 558 * why. 559 * Initialisation of the vectors will just panic on a data abort. 560 * This just fills in a slightly better one. 561 */ 562 #ifdef VERBOSE_INIT_ARM 563 printf("vectors "); 564 #endif 565 data_abort_handler_address = (u_int)data_abort_handler; 566 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 567 undefined_handler_address = (u_int)undefinedinstruction_bounce; 568 569 /* Initialise the undefined instruction handlers */ 570 #ifdef VERBOSE_INIT_ARM 571 printf("undefined "); 572 #endif 573 undefined_init(); 574 575 /* Load memory into UVM. */ 576 #ifdef VERBOSE_INIT_ARM 577 printf("page "); 578 #endif 579 uvm_md_init(); 580 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 581 atop(physical_freestart), atop(physical_freeend), 582 VM_FREELIST_DEFAULT); 583 584 /* Boot strap pmap telling it where managed kernel virtual memory is */ 585 #ifdef VERBOSE_INIT_ARM 586 printf("pmap "); 587 #endif 588 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 589 590 /* Setup the IRQ system */ 591 #ifdef VERBOSE_INIT_ARM 592 printf("irq "); 593 #endif 594 i80321_intr_init(); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("done.\n"); 598 #endif 599 600 #ifdef BOOTHOWTO 601 boothowto = BOOTHOWTO; 602 #endif 603 604 #ifdef DDB 605 db_machine_init(); 606 if (boothowto & RB_KDB) 607 Debugger(); 608 #endif 609 610 /* We return the new stack pointer address */ 611 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 612 } 613 614 /* 615 * void cpu_reboot(int howto, char *bootstr) 616 * 617 * Reboots the system 618 * 619 * Deal with any syncing, unmounting, dumping and shutdown hooks, 620 * then reset the CPU. 621 */ 622 void 623 cpu_reboot(int howto, char *bootstr) 624 { 625 626 /* 627 * If we are still cold then hit the air brakes 628 * and crash to earth fast 629 */ 630 if (cold) { 631 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 632 howto |= RB_HALT; 633 goto haltsys; 634 } 635 636 /* Disable console buffering */ 637 638 /* 639 * If RB_NOSYNC was not specified sync the discs. 640 * Note: Unless cold is set to 1 here, syslogd will die during the 641 * unmount. It looks like syslogd is getting woken up only to find 642 * that it cannot page part of the binary in as the filesystem has 643 * been unmounted. 644 */ 645 if ((howto & RB_NOSYNC) == 0) { 646 bootsync(); 647 /*resettodr();*/ 648 } 649 650 /* wait 1s */ 651 delay(1 * 1000 * 1000); 652 653 /* Say NO to interrupts */ 654 splhigh(); 655 656 /* Do a dump if requested. */ 657 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 658 dumpsys(); 659 } 660 661 haltsys: 662 /* Run any shutdown hooks */ 663 doshutdownhooks(); 664 665 pmf_system_shutdown(boothowto); 666 667 /* Make sure IRQ's are disabled */ 668 IRQdisable; 669 670 if (howto & RB_HALT) { 671 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 672 delay(3 * 1000 * 1000); /* wait 3s */ 673 674 printf("SHUTDOWN FAILED!\n"); 675 printf("The operating system has halted.\n"); 676 printf("Please press any key to reboot.\n\n"); 677 cngetc(); 678 } 679 680 printf("rebooting...\n\r"); 681 682 (void)disable_interrupts(I32_bit|F32_bit); 683 cpu_idcache_wbinv_all(); 684 cpu_drain_writebuf(); 685 686 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 687 delay(1 * 1000 * 1000); /* wait 1s */ 688 689 /* ...and if that didn't work, just croak. */ 690 printf("RESET FAILED!\n"); 691 for (;;) { 692 continue; 693 } 694 } 695 696 /* 697 * console 698 */ 699 #include "com.h" 700 #if NCOM > 0 701 #include <dev/ic/comreg.h> 702 #include <dev/ic/comvar.h> 703 #endif 704 705 /* 706 * Define the default console speed for the board. This is generally 707 * what the firmware provided with the board defaults to. 708 */ 709 #ifndef CONSPEED 710 #define CONSPEED B115200 711 #endif /* ! CONSPEED */ 712 713 #ifndef CONUNIT 714 #define CONUNIT 0 715 #endif 716 717 #ifndef CONMODE 718 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 719 #endif 720 721 int comcnspeed = CONSPEED; 722 int comcnmode = CONMODE; 723 int comcnunit = CONUNIT; 724 725 #if KGDB 726 #ifndef KGDB_DEVNAME 727 #error Must define KGDB_DEVNAME 728 #endif 729 const char kgdb_devname[] = KGDB_DEVNAME; 730 731 #ifndef KGDB_DEVADDR 732 #error Must define KGDB_DEVADDR 733 #endif 734 unsigned long kgdb_devaddr = KGDB_DEVADDR; 735 736 #ifndef KGDB_DEVRATE 737 #define KGDB_DEVRATE CONSPEED 738 #endif 739 int kgdb_devrate = KGDB_DEVRATE; 740 741 #ifndef KGDB_DEVMODE 742 #define KGDB_DEVMODE CONMODE 743 #endif 744 int kgdb_devmode = KGDB_DEVMODE; 745 #endif /* KGDB */ 746 747 void 748 consinit(void) 749 { 750 static const bus_addr_t comcnaddrs[] = { 751 HDLG_UART1, /* com0 */ 752 }; 753 static int consinit_called; 754 755 if (consinit_called) 756 return; 757 consinit_called = 1; 758 759 /* 760 * Console devices are mapped VA==PA. Our devmap reflects 761 * this, so register it now so drivers can map the console 762 * device. 763 */ 764 pmap_devmap_register(hdlg_devmap); 765 766 #if NCOM > 0 767 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 768 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 769 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 770 #else 771 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 772 #endif 773 #if KGDB 774 #if NCOM > 0 775 if (strcmp(kgdb_devname, "com") == 0) { 776 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 777 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 778 } 779 #endif /* NCOM > 0 */ 780 #endif /* KGDB */ 781 } 782