1 /* $NetBSD: hdlg_machdep.c,v 1.34 2023/04/20 08:28:04 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 1.34 2023/04/20 08:28:04 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 extern vaddr_t xscale_cache_clean_addr; 219 extern vsize_t xscale_minidata_clean_size; 220 int loop; 221 int loop1; 222 u_int l1pagetable; 223 paddr_t memstart; 224 psize_t memsize; 225 226 /* Calibrate the delay loop. */ 227 i80321_calibrate_delay(); 228 i80321_hardclock_hook = hardclock_hook; 229 230 /* 231 * Since we map the on-board devices VA==PA, and the kernel 232 * is running VA==PA, it's possible for us to initialize 233 * the console now. 234 */ 235 consinit(); 236 237 #ifdef VERBOSE_INIT_ARM 238 /* Talk to the user */ 239 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 240 #endif 241 242 /* 243 * Heads up ... Setup the CPU / MMU / TLB functions 244 */ 245 if (set_cpufuncs()) 246 panic("CPU not recognized!"); 247 248 /* 249 * We are currently running with the MMU enabled and the 250 * entire address space mapped VA==PA, except for the 251 * first 64M of RAM is also double-mapped at 0xc0000000. 252 * There is an L1 page table at 0xa0004000. 253 */ 254 255 /* 256 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 257 * registers. 258 */ 259 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 260 &memstart, &memsize); 261 262 #ifdef VERBOSE_INIT_ARM 263 printf("initarm: Configuring system ...\n"); 264 #endif 265 266 /* Fake bootconfig structure for the benefit of pmap.c */ 267 /* XXX must make the memory description h/w independent */ 268 bootconfig.dramblocks = 1; 269 bootconfig.dram[0].address = memstart; 270 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 271 272 /* 273 * Set up the variables that define the availability of 274 * physical memory. For now, we're going to set 275 * physical_freestart to 0xa0200000 (where the kernel 276 * was loaded), and allocate the memory we need downwards. 277 * If we get too close to the L1 table that we set up, we 278 * will panic. We will update physical_freestart and 279 * physical_freeend later to reflect what pmap_bootstrap() 280 * wants to see. 281 * 282 * XXX pmap_bootstrap() needs an enema. 283 */ 284 physical_start = bootconfig.dram[0].address; 285 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 286 287 physical_freestart = 0xa0009000UL; 288 physical_freeend = 0xa0200000UL; 289 290 physmem = (physical_end - physical_start) / PAGE_SIZE; 291 292 #ifdef VERBOSE_INIT_ARM 293 /* Tell the user about the memory */ 294 printf("physmemory: %ld pages at 0x%08lx -> 0x%08lx\n", physmem, 295 physical_start, physical_end - 1); 296 #endif 297 298 /* 299 * Okay, the kernel starts 2MB in from the bottom of physical 300 * memory. We are going to allocate our bootstrap pages downwards 301 * from there. 302 * 303 * We need to allocate some fixed page tables to get the kernel 304 * going. We allocate one page directory and a number of page 305 * tables and store the physical addresses in the kernel_pt_table 306 * array. 307 * 308 * The kernel page directory must be on a 16K boundary. The page 309 * tables must be on 4K boundaries. What we do is allocate the 310 * page directory on the first 16K boundary that we encounter, and 311 * the page tables on 4K boundaries otherwise. Since we allocate 312 * at least 3 L2 page tables, we are guaranteed to encounter at 313 * least one 16K aligned region. 314 */ 315 316 #ifdef VERBOSE_INIT_ARM 317 printf("Allocating page tables\n"); 318 #endif 319 320 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 321 322 #ifdef VERBOSE_INIT_ARM 323 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 324 physical_freestart, free_pages, free_pages); 325 #endif 326 327 /* Define a macro to simplify memory allocation */ 328 #define valloc_pages(var, np) \ 329 alloc_pages((var).pv_pa, (np)); \ 330 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 331 332 #define alloc_pages(var, np) \ 333 physical_freeend -= ((np) * PAGE_SIZE); \ 334 if (physical_freeend < physical_freestart) \ 335 panic("initarm: out of memory"); \ 336 (var) = physical_freeend; \ 337 free_pages -= (np); \ 338 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 339 340 loop1 = 0; 341 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 342 /* Are we 16KB aligned for an L1 ? */ 343 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 344 && kernel_l1pt.pv_pa == 0) { 345 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 346 } else { 347 valloc_pages(kernel_pt_table[loop1], 348 L2_TABLE_SIZE / PAGE_SIZE); 349 ++loop1; 350 } 351 } 352 353 /* This should never be able to happen but better confirm that. */ 354 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 355 panic("initarm: Failed to align the kernel page directory"); 356 357 /* 358 * Allocate a page for the system page mapped to V0x00000000 359 * This page will just contain the system vectors and can be 360 * shared by all processes. 361 */ 362 alloc_pages(systempage.pv_pa, 1); 363 364 /* Allocate stacks for all modes */ 365 valloc_pages(irqstack, IRQ_STACK_SIZE); 366 valloc_pages(abtstack, ABT_STACK_SIZE); 367 valloc_pages(undstack, UND_STACK_SIZE); 368 valloc_pages(kernelstack, UPAGES); 369 370 /* Allocate enough pages for cleaning the Mini-Data cache. */ 371 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 372 valloc_pages(minidataclean, 1); 373 374 #ifdef VERBOSE_INIT_ARM 375 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 376 irqstack.pv_va); 377 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 378 abtstack.pv_va); 379 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 380 undstack.pv_va); 381 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 382 kernelstack.pv_va); 383 #endif 384 385 /* 386 * XXX Defer this to later so that we can reclaim the memory 387 * XXX used by the RedBoot page tables. 388 */ 389 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 390 391 /* 392 * Ok we have allocated physical pages for the primary kernel 393 * page tables 394 */ 395 396 #ifdef VERBOSE_INIT_ARM 397 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 398 #endif 399 400 /* 401 * Now we start construction of the L1 page table 402 * We start by mapping the L2 page tables into the L1. 403 * This means that we can replace L1 mappings later on if necessary 404 */ 405 l1pagetable = kernel_l1pt.pv_pa; 406 407 /* Map the L2 pages tables in the L1 page table */ 408 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 409 &kernel_pt_table[KERNEL_PT_SYS]); 410 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 411 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 412 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 413 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 414 &kernel_pt_table[KERNEL_PT_IOPXS]); 415 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 416 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 417 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 418 419 /* update the top of the kernel VM */ 420 pmap_curmaxkvaddr = 421 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 422 423 #ifdef VERBOSE_INIT_ARM 424 printf("Mapping kernel\n"); 425 #endif 426 427 /* Now we fill in the L2 pagetable for the kernel static code/data */ 428 { 429 extern char etext[], _end[]; 430 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 431 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 432 u_int logical; 433 434 textsize = (textsize + PGOFSET) & ~PGOFSET; 435 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 436 437 logical = 0x00200000; /* offset of kernel in RAM */ 438 439 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 440 physical_start + logical, textsize, 441 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 442 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 443 physical_start + logical, totalsize - textsize, 444 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 445 } 446 447 #ifdef VERBOSE_INIT_ARM 448 printf("Constructing L2 page tables\n"); 449 #endif 450 451 /* Map the stack pages */ 452 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 453 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 454 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 455 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 456 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 457 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 458 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 459 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 460 461 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 462 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 463 464 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 465 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 466 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 467 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 468 } 469 470 /* Map the Mini-Data cache clean area. */ 471 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 472 minidataclean.pv_pa); 473 474 /* Map the vector page. */ 475 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 476 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 477 478 /* Map the statically mapped devices. */ 479 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 480 481 /* 482 * Give the XScale global cache clean code an appropriately 483 * sized chunk of unmapped VA space starting at 0xff000000 484 * (our device mappings end before this address). 485 */ 486 xscale_cache_clean_addr = 0xff000000U; 487 488 /* 489 * Now we have the real page tables in place so we can switch to them. 490 * Once this is done we will be running with the REAL kernel page 491 * tables. 492 */ 493 494 /* 495 * Update the physical_freestart/physical_freeend/free_pages 496 * variables. 497 */ 498 { 499 extern char _end[]; 500 501 physical_freestart = physical_start + 502 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 503 KERNEL_BASE); 504 physical_freeend = physical_end; 505 free_pages = 506 (physical_freeend - physical_freestart) / PAGE_SIZE; 507 } 508 509 /* Switch tables */ 510 #ifdef VERBOSE_INIT_ARM 511 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 512 physical_freestart, free_pages, free_pages); 513 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 514 #endif 515 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 516 cpu_setttb(kernel_l1pt.pv_pa, true); 517 cpu_tlb_flushID(); 518 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 519 520 /* 521 * Moved from cpu_startup() as data_abort_handler() references 522 * this during uvm init 523 */ 524 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 525 526 #ifdef VERBOSE_INIT_ARM 527 printf("done!\n"); 528 #endif 529 530 #ifdef VERBOSE_INIT_ARM 531 printf("bootstrap done.\n"); 532 #endif 533 534 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 535 536 /* 537 * Pages were allocated during the secondary bootstrap for the 538 * stacks for different CPU modes. 539 * We must now set the r13 registers in the different CPU modes to 540 * point to these stacks. 541 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 542 * of the stack memory. 543 */ 544 #ifdef VERBOSE_INIT_ARM 545 printf("init subsystems: stacks "); 546 #endif 547 548 set_stackptr(PSR_IRQ32_MODE, 549 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 550 set_stackptr(PSR_ABT32_MODE, 551 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 552 set_stackptr(PSR_UND32_MODE, 553 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 554 555 /* 556 * Well we should set a data abort handler. 557 * Once things get going this will change as we will need a proper 558 * handler. 559 * Until then we will use a handler that just panics but tells us 560 * why. 561 * Initialisation of the vectors will just panic on a data abort. 562 * This just fills in a slightly better one. 563 */ 564 #ifdef VERBOSE_INIT_ARM 565 printf("vectors "); 566 #endif 567 data_abort_handler_address = (u_int)data_abort_handler; 568 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 569 undefined_handler_address = (u_int)undefinedinstruction_bounce; 570 571 /* Initialise the undefined instruction handlers */ 572 #ifdef VERBOSE_INIT_ARM 573 printf("undefined "); 574 #endif 575 undefined_init(); 576 577 /* Load memory into UVM. */ 578 #ifdef VERBOSE_INIT_ARM 579 printf("page "); 580 #endif 581 uvm_md_init(); 582 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 583 atop(physical_freestart), atop(physical_freeend), 584 VM_FREELIST_DEFAULT); 585 586 /* Boot strap pmap telling it where managed kernel virtual memory is */ 587 #ifdef VERBOSE_INIT_ARM 588 printf("pmap "); 589 #endif 590 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 591 592 /* Setup the IRQ system */ 593 #ifdef VERBOSE_INIT_ARM 594 printf("irq "); 595 #endif 596 i80321_intr_init(); 597 598 #ifdef VERBOSE_INIT_ARM 599 printf("done.\n"); 600 #endif 601 602 #ifdef BOOTHOWTO 603 boothowto = BOOTHOWTO; 604 #endif 605 606 #ifdef DDB 607 db_machine_init(); 608 if (boothowto & RB_KDB) 609 Debugger(); 610 #endif 611 612 /* We return the new stack pointer address */ 613 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 614 } 615 616 /* 617 * void cpu_reboot(int howto, char *bootstr) 618 * 619 * Reboots the system 620 * 621 * Deal with any syncing, unmounting, dumping and shutdown hooks, 622 * then reset the CPU. 623 */ 624 void 625 cpu_reboot(int howto, char *bootstr) 626 { 627 628 /* 629 * If we are still cold then hit the air brakes 630 * and crash to earth fast 631 */ 632 if (cold) { 633 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 634 howto |= RB_HALT; 635 goto haltsys; 636 } 637 638 /* Disable console buffering */ 639 640 /* 641 * If RB_NOSYNC was not specified sync the discs. 642 * Note: Unless cold is set to 1 here, syslogd will die during the 643 * unmount. It looks like syslogd is getting woken up only to find 644 * that it cannot page part of the binary in as the filesystem has 645 * been unmounted. 646 */ 647 if ((howto & RB_NOSYNC) == 0) { 648 bootsync(); 649 /*resettodr();*/ 650 } 651 652 /* wait 1s */ 653 delay(1 * 1000 * 1000); 654 655 /* Say NO to interrupts */ 656 splhigh(); 657 658 /* Do a dump if requested. */ 659 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 660 dumpsys(); 661 } 662 663 haltsys: 664 /* Run any shutdown hooks */ 665 doshutdownhooks(); 666 667 pmf_system_shutdown(boothowto); 668 669 /* Make sure IRQ's are disabled */ 670 IRQdisable; 671 672 if (howto & RB_HALT) { 673 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 674 delay(3 * 1000 * 1000); /* wait 3s */ 675 676 printf("SHUTDOWN FAILED!\n"); 677 printf("The operating system has halted.\n"); 678 printf("Please press any key to reboot.\n\n"); 679 cngetc(); 680 } 681 682 printf("rebooting...\n\r"); 683 684 (void)disable_interrupts(I32_bit|F32_bit); 685 cpu_idcache_wbinv_all(); 686 cpu_drain_writebuf(); 687 688 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 689 delay(1 * 1000 * 1000); /* wait 1s */ 690 691 /* ...and if that didn't work, just croak. */ 692 printf("RESET FAILED!\n"); 693 for (;;) { 694 continue; 695 } 696 } 697 698 /* 699 * console 700 */ 701 #include "com.h" 702 #if NCOM > 0 703 #include <dev/ic/comreg.h> 704 #include <dev/ic/comvar.h> 705 #endif 706 707 /* 708 * Define the default console speed for the board. This is generally 709 * what the firmware provided with the board defaults to. 710 */ 711 #ifndef CONSPEED 712 #define CONSPEED B115200 713 #endif /* ! CONSPEED */ 714 715 #ifndef CONUNIT 716 #define CONUNIT 0 717 #endif 718 719 #ifndef CONMODE 720 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 721 #endif 722 723 int comcnspeed = CONSPEED; 724 int comcnmode = CONMODE; 725 int comcnunit = CONUNIT; 726 727 #if KGDB 728 #ifndef KGDB_DEVNAME 729 #error Must define KGDB_DEVNAME 730 #endif 731 const char kgdb_devname[] = KGDB_DEVNAME; 732 733 #ifndef KGDB_DEVADDR 734 #error Must define KGDB_DEVADDR 735 #endif 736 unsigned long kgdb_devaddr = KGDB_DEVADDR; 737 738 #ifndef KGDB_DEVRATE 739 #define KGDB_DEVRATE CONSPEED 740 #endif 741 int kgdb_devrate = KGDB_DEVRATE; 742 743 #ifndef KGDB_DEVMODE 744 #define KGDB_DEVMODE CONMODE 745 #endif 746 int kgdb_devmode = KGDB_DEVMODE; 747 #endif /* KGDB */ 748 749 void 750 consinit(void) 751 { 752 static const bus_addr_t comcnaddrs[] = { 753 HDLG_UART1, /* com0 */ 754 }; 755 static int consinit_called; 756 757 if (consinit_called) 758 return; 759 consinit_called = 1; 760 761 /* 762 * Console devices are mapped VA==PA. Our devmap reflects 763 * this, so register it now so drivers can map the console 764 * device. 765 */ 766 pmap_devmap_register(hdlg_devmap); 767 768 #if NCOM > 0 769 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 770 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 771 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 772 #else 773 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 774 #endif 775 #if KGDB 776 #if NCOM > 0 777 if (strcmp(kgdb_devname, "com") == 0) { 778 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 779 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 780 } 781 #endif /* NCOM > 0 */ 782 #endif /* KGDB */ 783 } 784