hdlg_machdep.c revision 1.28.8.1
1 /* $NetBSD: hdlg_machdep.c,v 1.28.8.1 2020/04/20 11:28:54 bouyer 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 1.28.8.1 2020/04/20 11:28:54 bouyer 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 extern vaddr_t xscale_cache_clean_addr; 231 #ifdef DIAGNOSTIC 232 extern vsize_t xscale_minidata_clean_size; 233 #endif 234 int loop; 235 int loop1; 236 u_int l1pagetable; 237 paddr_t memstart; 238 psize_t memsize; 239 240 /* Calibrate the delay loop. */ 241 i80321_calibrate_delay(); 242 i80321_hardclock_hook = hardclock_hook; 243 244 /* 245 * Since we map the on-board devices VA==PA, and the kernel 246 * is running VA==PA, it's possible for us to initialize 247 * the console now. 248 */ 249 consinit(); 250 251 #ifdef VERBOSE_INIT_ARM 252 /* Talk to the user */ 253 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 254 #endif 255 256 /* 257 * Heads up ... Setup the CPU / MMU / TLB functions 258 */ 259 if (set_cpufuncs()) 260 panic("CPU not recognized!"); 261 262 /* 263 * We are currently running with the MMU enabled and the 264 * entire address space mapped VA==PA, except for the 265 * first 64M of RAM is also double-mapped at 0xc0000000. 266 * There is an L1 page table at 0xa0004000. 267 */ 268 269 /* 270 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 271 * registers. 272 */ 273 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 274 &memstart, &memsize); 275 276 #ifdef VERBOSE_INIT_ARM 277 printf("initarm: Configuring system ...\n"); 278 #endif 279 280 /* Fake bootconfig structure for the benefit of pmap.c */ 281 /* XXX must make the memory description h/w independent */ 282 bootconfig.dramblocks = 1; 283 bootconfig.dram[0].address = memstart; 284 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 285 286 /* 287 * Set up the variables that define the availablilty of 288 * physical memory. For now, we're going to set 289 * physical_freestart to 0xa0200000 (where the kernel 290 * was loaded), and allocate the memory we need downwards. 291 * If we get too close to the L1 table that we set up, we 292 * will panic. We will update physical_freestart and 293 * physical_freeend later to reflect what pmap_bootstrap() 294 * wants to see. 295 * 296 * XXX pmap_bootstrap() needs an enema. 297 */ 298 physical_start = bootconfig.dram[0].address; 299 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 300 301 physical_freestart = 0xa0009000UL; 302 physical_freeend = 0xa0200000UL; 303 304 physmem = (physical_end - physical_start) / PAGE_SIZE; 305 306 #ifdef VERBOSE_INIT_ARM 307 /* Tell the user about the memory */ 308 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 309 physical_start, physical_end - 1); 310 #endif 311 312 /* 313 * Okay, the kernel starts 2MB in from the bottom of physical 314 * memory. We are going to allocate our bootstrap pages downwards 315 * from there. 316 * 317 * We need to allocate some fixed page tables to get the kernel 318 * going. We allocate one page directory and a number of page 319 * tables and store the physical addresses in the kernel_pt_table 320 * array. 321 * 322 * The kernel page directory must be on a 16K boundary. The page 323 * tables must be on 4K boundaries. What we do is allocate the 324 * page directory on the first 16K boundary that we encounter, and 325 * the page tables on 4K boundaries otherwise. Since we allocate 326 * at least 3 L2 page tables, we are guaranteed to encounter at 327 * least one 16K aligned region. 328 */ 329 330 #ifdef VERBOSE_INIT_ARM 331 printf("Allocating page tables\n"); 332 #endif 333 334 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 335 336 #ifdef VERBOSE_INIT_ARM 337 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 338 physical_freestart, free_pages, free_pages); 339 #endif 340 341 /* Define a macro to simplify memory allocation */ 342 #define valloc_pages(var, np) \ 343 alloc_pages((var).pv_pa, (np)); \ 344 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 345 346 #define alloc_pages(var, np) \ 347 physical_freeend -= ((np) * PAGE_SIZE); \ 348 if (physical_freeend < physical_freestart) \ 349 panic("initarm: out of memory"); \ 350 (var) = physical_freeend; \ 351 free_pages -= (np); \ 352 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 353 354 loop1 = 0; 355 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 356 /* Are we 16KB aligned for an L1 ? */ 357 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 358 && kernel_l1pt.pv_pa == 0) { 359 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 360 } else { 361 valloc_pages(kernel_pt_table[loop1], 362 L2_TABLE_SIZE / PAGE_SIZE); 363 ++loop1; 364 } 365 } 366 367 /* This should never be able to happen but better confirm that. */ 368 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 369 panic("initarm: Failed to align the kernel page directory"); 370 371 /* 372 * Allocate a page for the system page mapped to V0x00000000 373 * This page will just contain the system vectors and can be 374 * shared by all processes. 375 */ 376 alloc_pages(systempage.pv_pa, 1); 377 378 /* Allocate stacks for all modes */ 379 valloc_pages(irqstack, IRQ_STACK_SIZE); 380 valloc_pages(abtstack, ABT_STACK_SIZE); 381 valloc_pages(undstack, UND_STACK_SIZE); 382 valloc_pages(kernelstack, UPAGES); 383 384 /* Allocate enough pages for cleaning the Mini-Data cache. */ 385 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 386 valloc_pages(minidataclean, 1); 387 388 #ifdef VERBOSE_INIT_ARM 389 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 390 irqstack.pv_va); 391 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 392 abtstack.pv_va); 393 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 394 undstack.pv_va); 395 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 396 kernelstack.pv_va); 397 #endif 398 399 /* 400 * XXX Defer this to later so that we can reclaim the memory 401 * XXX used by the RedBoot page tables. 402 */ 403 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 404 405 /* 406 * Ok we have allocated physical pages for the primary kernel 407 * page tables 408 */ 409 410 #ifdef VERBOSE_INIT_ARM 411 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 412 #endif 413 414 /* 415 * Now we start construction of the L1 page table 416 * We start by mapping the L2 page tables into the L1. 417 * This means that we can replace L1 mappings later on if necessary 418 */ 419 l1pagetable = kernel_l1pt.pv_pa; 420 421 /* Map the L2 pages tables in the L1 page table */ 422 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 423 &kernel_pt_table[KERNEL_PT_SYS]); 424 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 425 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 426 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 427 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 428 &kernel_pt_table[KERNEL_PT_IOPXS]); 429 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 430 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 431 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 432 433 /* update the top of the kernel VM */ 434 pmap_curmaxkvaddr = 435 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 436 437 #ifdef VERBOSE_INIT_ARM 438 printf("Mapping kernel\n"); 439 #endif 440 441 /* Now we fill in the L2 pagetable for the kernel static code/data */ 442 { 443 extern char etext[], _end[]; 444 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 445 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 446 u_int logical; 447 448 textsize = (textsize + PGOFSET) & ~PGOFSET; 449 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 450 451 logical = 0x00200000; /* offset of kernel in RAM */ 452 453 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 454 physical_start + logical, textsize, 455 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 456 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 457 physical_start + logical, totalsize - textsize, 458 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 459 } 460 461 #ifdef VERBOSE_INIT_ARM 462 printf("Constructing L2 page tables\n"); 463 #endif 464 465 /* Map the stack pages */ 466 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 467 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 468 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 469 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 470 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 471 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 472 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 473 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 474 475 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 476 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 477 478 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 479 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 480 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 481 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 482 } 483 484 /* Map the Mini-Data cache clean area. */ 485 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 486 minidataclean.pv_pa); 487 488 /* Map the vector page. */ 489 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 490 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 491 492 /* Map the statically mapped devices. */ 493 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 494 495 /* 496 * Give the XScale global cache clean code an appropriately 497 * sized chunk of unmapped VA space starting at 0xff000000 498 * (our device mappings end before this address). 499 */ 500 xscale_cache_clean_addr = 0xff000000U; 501 502 /* 503 * Now we have the real page tables in place so we can switch to them. 504 * Once this is done we will be running with the REAL kernel page 505 * tables. 506 */ 507 508 /* 509 * Update the physical_freestart/physical_freeend/free_pages 510 * variables. 511 */ 512 { 513 extern char _end[]; 514 515 physical_freestart = physical_start + 516 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 517 KERNEL_BASE); 518 physical_freeend = physical_end; 519 free_pages = 520 (physical_freeend - physical_freestart) / PAGE_SIZE; 521 } 522 523 /* Switch tables */ 524 #ifdef VERBOSE_INIT_ARM 525 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 526 physical_freestart, free_pages, free_pages); 527 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 528 #endif 529 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 530 cpu_setttb(kernel_l1pt.pv_pa, true); 531 cpu_tlb_flushID(); 532 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 533 534 /* 535 * Moved from cpu_startup() as data_abort_handler() references 536 * this during uvm init 537 */ 538 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("done!\n"); 542 #endif 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("bootstrap done.\n"); 546 #endif 547 548 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 549 550 /* 551 * Pages were allocated during the secondary bootstrap for the 552 * stacks for different CPU modes. 553 * We must now set the r13 registers in the different CPU modes to 554 * point to these stacks. 555 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 556 * of the stack memory. 557 */ 558 #ifdef VERBOSE_INIT_ARM 559 printf("init subsystems: stacks "); 560 #endif 561 562 set_stackptr(PSR_IRQ32_MODE, 563 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 564 set_stackptr(PSR_ABT32_MODE, 565 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 566 set_stackptr(PSR_UND32_MODE, 567 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 568 569 /* 570 * Well we should set a data abort handler. 571 * Once things get going this will change as we will need a proper 572 * handler. 573 * Until then we will use a handler that just panics but tells us 574 * why. 575 * Initialisation of the vectors will just panic on a data abort. 576 * This just fills in a slightly better one. 577 */ 578 #ifdef VERBOSE_INIT_ARM 579 printf("vectors "); 580 #endif 581 data_abort_handler_address = (u_int)data_abort_handler; 582 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 583 undefined_handler_address = (u_int)undefinedinstruction_bounce; 584 585 /* Initialise the undefined instruction handlers */ 586 #ifdef VERBOSE_INIT_ARM 587 printf("undefined "); 588 #endif 589 undefined_init(); 590 591 /* Load memory into UVM. */ 592 #ifdef VERBOSE_INIT_ARM 593 printf("page "); 594 #endif 595 uvm_md_init(); 596 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 597 atop(physical_freestart), atop(physical_freeend), 598 VM_FREELIST_DEFAULT); 599 600 /* Boot strap pmap telling it where managed kernel virtual memory is */ 601 #ifdef VERBOSE_INIT_ARM 602 printf("pmap "); 603 #endif 604 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 605 606 /* Setup the IRQ system */ 607 #ifdef VERBOSE_INIT_ARM 608 printf("irq "); 609 #endif 610 i80321_intr_init(); 611 612 #ifdef VERBOSE_INIT_ARM 613 printf("done.\n"); 614 #endif 615 616 #ifdef BOOTHOWTO 617 boothowto = BOOTHOWTO; 618 #endif 619 620 #ifdef DDB 621 db_machine_init(); 622 if (boothowto & RB_KDB) 623 Debugger(); 624 #endif 625 626 /* We return the new stack pointer address */ 627 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 628 } 629 630 /* 631 * void cpu_reboot(int howto, char *bootstr) 632 * 633 * Reboots the system 634 * 635 * Deal with any syncing, unmounting, dumping and shutdown hooks, 636 * then reset the CPU. 637 */ 638 void 639 cpu_reboot(int howto, char *bootstr) 640 { 641 642 /* 643 * If we are still cold then hit the air brakes 644 * and crash to earth fast 645 */ 646 if (cold) { 647 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 648 howto |= RB_HALT; 649 goto haltsys; 650 } 651 652 /* Disable console buffering */ 653 654 /* 655 * If RB_NOSYNC was not specified sync the discs. 656 * Note: Unless cold is set to 1 here, syslogd will die during the 657 * unmount. It looks like syslogd is getting woken up only to find 658 * that it cannot page part of the binary in as the filesystem has 659 * been unmounted. 660 */ 661 if ((howto & RB_NOSYNC) == 0) { 662 bootsync(); 663 /*resettodr();*/ 664 } 665 666 /* wait 1s */ 667 delay(1 * 1000 * 1000); 668 669 /* Say NO to interrupts */ 670 splhigh(); 671 672 /* Do a dump if requested. */ 673 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 674 dumpsys(); 675 } 676 677 haltsys: 678 /* Run any shutdown hooks */ 679 doshutdownhooks(); 680 681 pmf_system_shutdown(boothowto); 682 683 /* Make sure IRQ's are disabled */ 684 IRQdisable; 685 686 if (howto & RB_HALT) { 687 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 688 delay(3 * 1000 * 1000); /* wait 3s */ 689 690 printf("SHUTDOWN FAILED!\n"); 691 printf("The operating system has halted.\n"); 692 printf("Please press any key to reboot.\n\n"); 693 cngetc(); 694 } 695 696 printf("rebooting...\n\r"); 697 698 (void)disable_interrupts(I32_bit|F32_bit); 699 cpu_idcache_wbinv_all(); 700 cpu_drain_writebuf(); 701 702 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 703 delay(1 * 1000 * 1000); /* wait 1s */ 704 705 /* ...and if that didn't work, just croak. */ 706 printf("RESET FAILED!\n"); 707 for (;;) { 708 continue; 709 } 710 } 711 712 /* 713 * console 714 */ 715 #include "com.h" 716 #if NCOM > 0 717 #include <dev/ic/comreg.h> 718 #include <dev/ic/comvar.h> 719 #endif 720 721 /* 722 * Define the default console speed for the board. This is generally 723 * what the firmware provided with the board defaults to. 724 */ 725 #ifndef CONSPEED 726 #define CONSPEED B115200 727 #endif /* ! CONSPEED */ 728 729 #ifndef CONUNIT 730 #define CONUNIT 0 731 #endif 732 733 #ifndef CONMODE 734 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 735 #endif 736 737 int comcnspeed = CONSPEED; 738 int comcnmode = CONMODE; 739 int comcnunit = CONUNIT; 740 741 #if KGDB 742 #ifndef KGDB_DEVNAME 743 #error Must define KGDB_DEVNAME 744 #endif 745 const char kgdb_devname[] = KGDB_DEVNAME; 746 747 #ifndef KGDB_DEVADDR 748 #error Must define KGDB_DEVADDR 749 #endif 750 unsigned long kgdb_devaddr = KGDB_DEVADDR; 751 752 #ifndef KGDB_DEVRATE 753 #define KGDB_DEVRATE CONSPEED 754 #endif 755 int kgdb_devrate = KGDB_DEVRATE; 756 757 #ifndef KGDB_DEVMODE 758 #define KGDB_DEVMODE CONMODE 759 #endif 760 int kgdb_devmode = KGDB_DEVMODE; 761 #endif /* KGDB */ 762 763 void 764 consinit(void) 765 { 766 static const bus_addr_t comcnaddrs[] = { 767 HDLG_UART1, /* com0 */ 768 }; 769 static int consinit_called; 770 771 if (consinit_called) 772 return; 773 consinit_called = 1; 774 775 /* 776 * Console devices are mapped VA==PA. Our devmap reflects 777 * this, so register it now so drivers can map the console 778 * device. 779 */ 780 pmap_devmap_register(hdlg_devmap); 781 782 #if NCOM > 0 783 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 784 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 785 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 786 #else 787 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 788 #endif 789 #if KGDB 790 #if NCOM > 0 791 if (strcmp(kgdb_devname, "com") == 0) { 792 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 793 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 794 } 795 #endif /* NCOM > 0 */ 796 #endif /* KGDB */ 797 } 798
Indexes created Wed Oct 01 19:09:53 GMT 2025