hdlg_machdep.c revision 1.33.4.1
1 /* $NetBSD: hdlg_machdep.c,v 1.33.4.1 2023/10/14 06:52:17 martin 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 1.33.4.1 2023/10/14 06:52:17 martin 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 { 175 HDLG_OBIO_BASE, 176 HDLG_OBIO_BASE, 177 HDLG_OBIO_SIZE, 178 VM_PROT_READ|VM_PROT_WRITE, 179 PTE_NOCACHE, 180 }, 181 182 { 183 HDLG_IOW_VBASE, 184 VERDE_OUT_XLATE_IO_WIN0_BASE, 185 VERDE_OUT_XLATE_IO_WIN_SIZE, 186 VM_PROT_READ|VM_PROT_WRITE, 187 PTE_NOCACHE, 188 }, 189 190 { 191 HDLG_80321_VBASE, 192 VERDE_PMMR_BASE, 193 VERDE_PMMR_SIZE, 194 VM_PROT_READ|VM_PROT_WRITE, 195 PTE_NOCACHE, 196 }, 197 198 { 199 0, 200 0, 201 0, 202 0, 203 0, 204 } 205 }; 206 207 static void 208 hardclock_hook(void) 209 { 210 211 /* Nothing to do */ 212 } 213 214 /* 215 * vaddr_t initarm(...) 216 * 217 * Initial entry point on startup. This gets called before main() is 218 * entered. 219 * It should be responsible for setting up everything that must be 220 * in place when main is called. 221 * This includes 222 * Taking a copy of the boot configuration structure. 223 * Initialising the physical console so characters can be printed. 224 * Setting up page tables for the kernel 225 * Relocating the kernel to the bottom of physical memory 226 */ 227 vaddr_t 228 initarm(void *arg) 229 { 230 int loop; 231 int loop1; 232 u_int l1pagetable; 233 paddr_t memstart; 234 psize_t memsize; 235 236 /* Calibrate the delay loop. */ 237 i80321_calibrate_delay(); 238 i80321_hardclock_hook = hardclock_hook; 239 240 /* 241 * Since we map the on-board devices VA==PA, and the kernel 242 * is running VA==PA, it's possible for us to initialize 243 * the console now. 244 */ 245 consinit(); 246 247 #ifdef VERBOSE_INIT_ARM 248 /* Talk to the user */ 249 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 250 #endif 251 252 /* 253 * Heads up ... Setup the CPU / MMU / TLB functions 254 */ 255 if (set_cpufuncs()) 256 panic("CPU not recognized!"); 257 258 /* 259 * We are currently running with the MMU enabled and the 260 * entire address space mapped VA==PA, except for the 261 * first 64M of RAM is also double-mapped at 0xc0000000. 262 * There is an L1 page table at 0xa0004000. 263 */ 264 265 /* 266 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 267 * registers. 268 */ 269 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 270 &memstart, &memsize); 271 272 #ifdef VERBOSE_INIT_ARM 273 printf("initarm: Configuring system ...\n"); 274 #endif 275 276 /* Fake bootconfig structure for the benefit of pmap.c */ 277 /* XXX must make the memory description h/w independent */ 278 bootconfig.dramblocks = 1; 279 bootconfig.dram[0].address = memstart; 280 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 281 282 /* 283 * Set up the variables that define the availability of 284 * physical memory. For now, we're going to set 285 * physical_freestart to 0xa0200000 (where the kernel 286 * was loaded), and allocate the memory we need downwards. 287 * If we get too close to the L1 table that we set up, we 288 * will panic. We will update physical_freestart and 289 * physical_freeend later to reflect what pmap_bootstrap() 290 * wants to see. 291 * 292 * XXX pmap_bootstrap() needs an enema. 293 */ 294 physical_start = bootconfig.dram[0].address; 295 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 296 297 physical_freestart = 0xa0009000UL; 298 physical_freeend = 0xa0200000UL; 299 300 physmem = (physical_end - physical_start) / PAGE_SIZE; 301 302 #ifdef VERBOSE_INIT_ARM 303 /* Tell the user about the memory */ 304 printf("physmemory: %ld pages at 0x%08lx -> 0x%08lx\n", physmem, 305 physical_start, physical_end - 1); 306 #endif 307 308 /* 309 * Okay, the kernel starts 2MB in from the bottom of physical 310 * memory. We are going to allocate our bootstrap pages downwards 311 * from there. 312 * 313 * We need to allocate some fixed page tables to get the kernel 314 * going. We allocate one page directory and a number of page 315 * tables and store the physical addresses in the kernel_pt_table 316 * array. 317 * 318 * The kernel page directory must be on a 16K boundary. The page 319 * tables must be on 4K boundaries. What we do is allocate the 320 * page directory on the first 16K boundary that we encounter, and 321 * the page tables on 4K boundaries otherwise. Since we allocate 322 * at least 3 L2 page tables, we are guaranteed to encounter at 323 * least one 16K aligned region. 324 */ 325 326 #ifdef VERBOSE_INIT_ARM 327 printf("Allocating page tables\n"); 328 #endif 329 330 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 331 332 #ifdef VERBOSE_INIT_ARM 333 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 334 physical_freestart, free_pages, free_pages); 335 #endif 336 337 /* Define a macro to simplify memory allocation */ 338 #define valloc_pages(var, np) \ 339 alloc_pages((var).pv_pa, (np)); \ 340 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 341 342 #define alloc_pages(var, np) \ 343 physical_freeend -= ((np) * PAGE_SIZE); \ 344 if (physical_freeend < physical_freestart) \ 345 panic("initarm: out of memory"); \ 346 (var) = physical_freeend; \ 347 free_pages -= (np); \ 348 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 349 350 loop1 = 0; 351 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 352 /* Are we 16KB aligned for an L1 ? */ 353 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 354 && kernel_l1pt.pv_pa == 0) { 355 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 356 } else { 357 valloc_pages(kernel_pt_table[loop1], 358 L2_TABLE_SIZE / PAGE_SIZE); 359 ++loop1; 360 } 361 } 362 363 /* This should never be able to happen but better confirm that. */ 364 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 365 panic("initarm: Failed to align the kernel page directory"); 366 367 /* 368 * Allocate a page for the system page mapped to V0x00000000 369 * This page will just contain the system vectors and can be 370 * shared by all processes. 371 */ 372 alloc_pages(systempage.pv_pa, 1); 373 374 /* Allocate stacks for all modes */ 375 valloc_pages(irqstack, IRQ_STACK_SIZE); 376 valloc_pages(abtstack, ABT_STACK_SIZE); 377 valloc_pages(undstack, UND_STACK_SIZE); 378 valloc_pages(kernelstack, UPAGES); 379 380 /* Allocate enough pages for cleaning the Mini-Data cache. */ 381 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 382 valloc_pages(minidataclean, 1); 383 384 #ifdef VERBOSE_INIT_ARM 385 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 386 irqstack.pv_va); 387 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 388 abtstack.pv_va); 389 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 390 undstack.pv_va); 391 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 392 kernelstack.pv_va); 393 #endif 394 395 /* 396 * XXX Defer this to later so that we can reclaim the memory 397 * XXX used by the RedBoot page tables. 398 */ 399 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 400 401 /* 402 * Ok we have allocated physical pages for the primary kernel 403 * page tables 404 */ 405 406 #ifdef VERBOSE_INIT_ARM 407 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 408 #endif 409 410 /* 411 * Now we start construction of the L1 page table 412 * We start by mapping the L2 page tables into the L1. 413 * This means that we can replace L1 mappings later on if necessary 414 */ 415 l1pagetable = kernel_l1pt.pv_pa; 416 417 /* Map the L2 pages tables in the L1 page table */ 418 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 419 &kernel_pt_table[KERNEL_PT_SYS]); 420 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 421 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 422 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 423 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 424 &kernel_pt_table[KERNEL_PT_IOPXS]); 425 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 426 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 427 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 428 429 /* update the top of the kernel VM */ 430 pmap_curmaxkvaddr = 431 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 432 433 #ifdef VERBOSE_INIT_ARM 434 printf("Mapping kernel\n"); 435 #endif 436 437 /* Now we fill in the L2 pagetable for the kernel static code/data */ 438 { 439 extern char etext[], _end[]; 440 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 441 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 442 u_int logical; 443 444 textsize = (textsize + PGOFSET) & ~PGOFSET; 445 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 446 447 logical = 0x00200000; /* offset of kernel in RAM */ 448 449 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 450 physical_start + logical, textsize, 451 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 452 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 453 physical_start + logical, totalsize - textsize, 454 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 455 } 456 457 #ifdef VERBOSE_INIT_ARM 458 printf("Constructing L2 page tables\n"); 459 #endif 460 461 /* Map the stack pages */ 462 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 463 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 464 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 465 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 466 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 467 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 468 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 469 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 470 471 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 472 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 473 474 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 475 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 476 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 477 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 478 } 479 480 /* Map the Mini-Data cache clean area. */ 481 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 482 minidataclean.pv_pa); 483 484 /* Map the vector page. */ 485 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 486 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 487 488 /* Map the statically mapped devices. */ 489 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 490 491 /* 492 * Give the XScale global cache clean code an appropriately 493 * sized chunk of unmapped VA space starting at 0xff000000 494 * (our device mappings end before this address). 495 */ 496 xscale_cache_clean_addr = 0xff000000U; 497 498 /* 499 * Now we have the real page tables in place so we can switch to them. 500 * Once this is done we will be running with the REAL kernel page 501 * tables. 502 */ 503 504 /* 505 * Update the physical_freestart/physical_freeend/free_pages 506 * variables. 507 */ 508 { 509 extern char _end[]; 510 511 physical_freestart = physical_start + 512 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 513 KERNEL_BASE); 514 physical_freeend = physical_end; 515 free_pages = 516 (physical_freeend - physical_freestart) / PAGE_SIZE; 517 } 518 519 /* Switch tables */ 520 #ifdef VERBOSE_INIT_ARM 521 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 522 physical_freestart, free_pages, free_pages); 523 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 524 #endif 525 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 526 cpu_setttb(kernel_l1pt.pv_pa, true); 527 cpu_tlb_flushID(); 528 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 529 530 /* 531 * Moved from cpu_startup() as data_abort_handler() references 532 * this during uvm init 533 */ 534 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("done!\n"); 538 #endif 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("bootstrap done.\n"); 542 #endif 543 544 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 545 546 /* 547 * Pages were allocated during the secondary bootstrap for the 548 * stacks for different CPU modes. 549 * We must now set the r13 registers in the different CPU modes to 550 * point to these stacks. 551 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 552 * of the stack memory. 553 */ 554 #ifdef VERBOSE_INIT_ARM 555 printf("init subsystems: stacks "); 556 #endif 557 558 set_stackptr(PSR_IRQ32_MODE, 559 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 560 set_stackptr(PSR_ABT32_MODE, 561 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 562 set_stackptr(PSR_UND32_MODE, 563 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 564 565 /* 566 * Well we should set a data abort handler. 567 * Once things get going this will change as we will need a proper 568 * handler. 569 * Until then we will use a handler that just panics but tells us 570 * why. 571 * Initialisation of the vectors will just panic on a data abort. 572 * This just fills in a slightly better one. 573 */ 574 #ifdef VERBOSE_INIT_ARM 575 printf("vectors "); 576 #endif 577 data_abort_handler_address = (u_int)data_abort_handler; 578 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 579 undefined_handler_address = (u_int)undefinedinstruction_bounce; 580 581 /* Initialise the undefined instruction handlers */ 582 #ifdef VERBOSE_INIT_ARM 583 printf("undefined "); 584 #endif 585 undefined_init(); 586 587 /* Load memory into UVM. */ 588 #ifdef VERBOSE_INIT_ARM 589 printf("page "); 590 #endif 591 uvm_md_init(); 592 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 593 atop(physical_freestart), atop(physical_freeend), 594 VM_FREELIST_DEFAULT); 595 596 /* Boot strap pmap telling it where managed kernel virtual memory is */ 597 #ifdef VERBOSE_INIT_ARM 598 printf("pmap "); 599 #endif 600 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 601 602 /* Setup the IRQ system */ 603 #ifdef VERBOSE_INIT_ARM 604 printf("irq "); 605 #endif 606 i80321_intr_init(); 607 608 #ifdef VERBOSE_INIT_ARM 609 printf("done.\n"); 610 #endif 611 612 #ifdef BOOTHOWTO 613 boothowto = BOOTHOWTO; 614 #endif 615 616 #ifdef DDB 617 db_machine_init(); 618 if (boothowto & RB_KDB) 619 Debugger(); 620 #endif 621 622 /* We return the new stack pointer address */ 623 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 624 } 625 626 /* 627 * void cpu_reboot(int howto, char *bootstr) 628 * 629 * Reboots the system 630 * 631 * Deal with any syncing, unmounting, dumping and shutdown hooks, 632 * then reset the CPU. 633 */ 634 void 635 cpu_reboot(int howto, char *bootstr) 636 { 637 638 /* 639 * If we are still cold then hit the air brakes 640 * and crash to earth fast 641 */ 642 if (cold) { 643 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 644 howto |= RB_HALT; 645 goto haltsys; 646 } 647 648 /* Disable console buffering */ 649 650 /* 651 * If RB_NOSYNC was not specified sync the discs. 652 * Note: Unless cold is set to 1 here, syslogd will die during the 653 * unmount. It looks like syslogd is getting woken up only to find 654 * that it cannot page part of the binary in as the filesystem has 655 * been unmounted. 656 */ 657 if ((howto & RB_NOSYNC) == 0) { 658 bootsync(); 659 /*resettodr();*/ 660 } 661 662 /* wait 1s */ 663 delay(1 * 1000 * 1000); 664 665 /* Say NO to interrupts */ 666 splhigh(); 667 668 /* Do a dump if requested. */ 669 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 670 dumpsys(); 671 } 672 673 haltsys: 674 /* Run any shutdown hooks */ 675 doshutdownhooks(); 676 677 pmf_system_shutdown(boothowto); 678 679 /* Make sure IRQ's are disabled */ 680 IRQdisable; 681 682 if (howto & RB_HALT) { 683 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 684 delay(3 * 1000 * 1000); /* wait 3s */ 685 686 printf("SHUTDOWN FAILED!\n"); 687 printf("The operating system has halted.\n"); 688 printf("Please press any key to reboot.\n\n"); 689 cngetc(); 690 } 691 692 printf("rebooting...\n\r"); 693 694 (void)disable_interrupts(I32_bit|F32_bit); 695 cpu_idcache_wbinv_all(); 696 cpu_drain_writebuf(); 697 698 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 699 delay(1 * 1000 * 1000); /* wait 1s */ 700 701 /* ...and if that didn't work, just croak. */ 702 printf("RESET FAILED!\n"); 703 for (;;) { 704 continue; 705 } 706 } 707 708 /* 709 * console 710 */ 711 #include "com.h" 712 #if NCOM > 0 713 #include <dev/ic/comreg.h> 714 #include <dev/ic/comvar.h> 715 #endif 716 717 /* 718 * Define the default console speed for the board. This is generally 719 * what the firmware provided with the board defaults to. 720 */ 721 #ifndef CONSPEED 722 #define CONSPEED B115200 723 #endif /* ! CONSPEED */ 724 725 #ifndef CONUNIT 726 #define CONUNIT 0 727 #endif 728 729 #ifndef CONMODE 730 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 731 #endif 732 733 int comcnspeed = CONSPEED; 734 int comcnmode = CONMODE; 735 int comcnunit = CONUNIT; 736 737 #if KGDB 738 #ifndef KGDB_DEVNAME 739 #error Must define KGDB_DEVNAME 740 #endif 741 const char kgdb_devname[] = KGDB_DEVNAME; 742 743 #ifndef KGDB_DEVADDR 744 #error Must define KGDB_DEVADDR 745 #endif 746 unsigned long kgdb_devaddr = KGDB_DEVADDR; 747 748 #ifndef KGDB_DEVRATE 749 #define KGDB_DEVRATE CONSPEED 750 #endif 751 int kgdb_devrate = KGDB_DEVRATE; 752 753 #ifndef KGDB_DEVMODE 754 #define KGDB_DEVMODE CONMODE 755 #endif 756 int kgdb_devmode = KGDB_DEVMODE; 757 #endif /* KGDB */ 758 759 void 760 consinit(void) 761 { 762 static const bus_addr_t comcnaddrs[] = { 763 HDLG_UART1, /* com0 */ 764 }; 765 static int consinit_called; 766 767 if (consinit_called) 768 return; 769 consinit_called = 1; 770 771 /* 772 * Console devices are mapped VA==PA. Our devmap reflects 773 * this, so register it now so drivers can map the console 774 * device. 775 */ 776 pmap_devmap_register(hdlg_devmap); 777 778 #if NCOM > 0 779 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 780 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 781 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 782 #else 783 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 784 #endif 785 #if KGDB 786 #if NCOM > 0 787 if (strcmp(kgdb_devname, "com") == 0) { 788 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 789 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 790 } 791 #endif /* NCOM > 0 */ 792 #endif /* KGDB */ 793 } 794
Indexes created Wed Oct 01 19:09:53 GMT 2025