hdlg_machdep.c revision 1.23.14.1
1 /* $NetBSD: hdlg_machdep.c,v 1.23.14.1 2018/09/06 06:55:30 pgoyette Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe and Steve C. Woodford for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (c) 1997,1998 Mark Brinicombe. 40 * Copyright (c) 1997,1998 Causality Limited. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by Mark Brinicombe 54 * for the NetBSD Project. 55 * 4. The name of the company nor the name of the author may be used to 56 * endorse or promote products derived from this software without specific 57 * prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 * 71 * Machine dependent functions for kernel setup for GigaLANDISK 72 * using RedBoot firmware. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: hdlg_machdep.c,v 1.23.14.1 2018/09/06 06:55:30 pgoyette Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_ddb.h" 80 #include "opt_kgdb.h" 81 #include "opt_pmap_debug.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 #ifdef PMAP_DEBUG 151 extern int pmap_debug_level; 152 #endif 153 154 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 155 156 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 157 #define KERNEL_PT_KERNEL_NUM 4 158 159 /* L2 table for mapping i80321 */ 160 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 161 162 /* L2 tables for mapping kernel VM */ 163 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 164 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 165 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 166 167 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 168 169 /* Prototypes */ 170 void consinit(void); 171 172 /* Static device mappings. */ 173 static const struct pmap_devmap hdlg_devmap[] = { 174 /* 175 * Map the on-board devices VA == PA so that we can access them 176 * with the MMU on or off. 177 */ 178 { 179 HDLG_OBIO_BASE, 180 HDLG_OBIO_BASE, 181 HDLG_OBIO_SIZE, 182 VM_PROT_READ|VM_PROT_WRITE, 183 PTE_NOCACHE, 184 }, 185 186 { 187 HDLG_IOW_VBASE, 188 VERDE_OUT_XLATE_IO_WIN0_BASE, 189 VERDE_OUT_XLATE_IO_WIN_SIZE, 190 VM_PROT_READ|VM_PROT_WRITE, 191 PTE_NOCACHE, 192 }, 193 194 { 195 HDLG_80321_VBASE, 196 VERDE_PMMR_BASE, 197 VERDE_PMMR_SIZE, 198 VM_PROT_READ|VM_PROT_WRITE, 199 PTE_NOCACHE, 200 }, 201 202 { 203 0, 204 0, 205 0, 206 0, 207 0, 208 } 209 }; 210 211 static void 212 hardclock_hook(void) 213 { 214 215 /* Nothing to do */ 216 } 217 218 /* 219 * u_int initarm(...) 220 * 221 * Initial entry point on startup. This gets called before main() is 222 * entered. 223 * It should be responsible for setting up everything that must be 224 * in place when main is called. 225 * This includes 226 * Taking a copy of the boot configuration structure. 227 * Initialising the physical console so characters can be printed. 228 * Setting up page tables for the kernel 229 * Relocating the kernel to the bottom of physical memory 230 */ 231 u_int 232 initarm(void *arg) 233 { 234 extern vaddr_t xscale_cache_clean_addr; 235 #ifdef DIAGNOSTIC 236 extern vsize_t xscale_minidata_clean_size; 237 #endif 238 int loop; 239 int loop1; 240 u_int l1pagetable; 241 paddr_t memstart; 242 psize_t memsize; 243 244 /* Calibrate the delay loop. */ 245 i80321_calibrate_delay(); 246 i80321_hardclock_hook = hardclock_hook; 247 248 /* 249 * Since we map the on-board devices VA==PA, and the kernel 250 * is running VA==PA, it's possible for us to initialize 251 * the console now. 252 */ 253 consinit(); 254 255 #ifdef VERBOSE_INIT_ARM 256 /* Talk to the user */ 257 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 258 #endif 259 260 /* 261 * Heads up ... Setup the CPU / MMU / TLB functions 262 */ 263 if (set_cpufuncs()) 264 panic("CPU not recognized!"); 265 266 /* 267 * We are currently running with the MMU enabled and the 268 * entire address space mapped VA==PA, except for the 269 * first 64M of RAM is also double-mapped at 0xc0000000. 270 * There is an L1 page table at 0xa0004000. 271 */ 272 273 /* 274 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 275 * registers. 276 */ 277 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 278 &memstart, &memsize); 279 280 #ifdef VERBOSE_INIT_ARM 281 printf("initarm: Configuring system ...\n"); 282 #endif 283 284 /* Fake bootconfig structure for the benefit of pmap.c */ 285 /* XXX must make the memory description h/w independent */ 286 bootconfig.dramblocks = 1; 287 bootconfig.dram[0].address = memstart; 288 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 289 290 /* 291 * Set up the variables that define the availablilty of 292 * physical memory. For now, we're going to set 293 * physical_freestart to 0xa0200000 (where the kernel 294 * was loaded), and allocate the memory we need downwards. 295 * If we get too close to the L1 table that we set up, we 296 * will panic. We will update physical_freestart and 297 * physical_freeend later to reflect what pmap_bootstrap() 298 * wants to see. 299 * 300 * XXX pmap_bootstrap() needs an enema. 301 */ 302 physical_start = bootconfig.dram[0].address; 303 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 304 305 physical_freestart = 0xa0009000UL; 306 physical_freeend = 0xa0200000UL; 307 308 physmem = (physical_end - physical_start) / PAGE_SIZE; 309 310 #ifdef VERBOSE_INIT_ARM 311 /* Tell the user about the memory */ 312 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 313 physical_start, physical_end - 1); 314 #endif 315 316 /* 317 * Okay, the kernel starts 2MB in from the bottom of physical 318 * memory. We are going to allocate our bootstrap pages downwards 319 * from there. 320 * 321 * We need to allocate some fixed page tables to get the kernel 322 * going. We allocate one page directory and a number of page 323 * tables and store the physical addresses in the kernel_pt_table 324 * array. 325 * 326 * The kernel page directory must be on a 16K boundary. The page 327 * tables must be on 4K boundaries. What we do is allocate the 328 * page directory on the first 16K boundary that we encounter, and 329 * the page tables on 4K boundaries otherwise. Since we allocate 330 * at least 3 L2 page tables, we are guaranteed to encounter at 331 * least one 16K aligned region. 332 */ 333 334 #ifdef VERBOSE_INIT_ARM 335 printf("Allocating page tables\n"); 336 #endif 337 338 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 339 340 #ifdef VERBOSE_INIT_ARM 341 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 342 physical_freestart, free_pages, free_pages); 343 #endif 344 345 /* Define a macro to simplify memory allocation */ 346 #define valloc_pages(var, np) \ 347 alloc_pages((var).pv_pa, (np)); \ 348 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 349 350 #define alloc_pages(var, np) \ 351 physical_freeend -= ((np) * PAGE_SIZE); \ 352 if (physical_freeend < physical_freestart) \ 353 panic("initarm: out of memory"); \ 354 (var) = physical_freeend; \ 355 free_pages -= (np); \ 356 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 357 358 loop1 = 0; 359 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 360 /* Are we 16KB aligned for an L1 ? */ 361 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 362 && kernel_l1pt.pv_pa == 0) { 363 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 364 } else { 365 valloc_pages(kernel_pt_table[loop1], 366 L2_TABLE_SIZE / PAGE_SIZE); 367 ++loop1; 368 } 369 } 370 371 /* This should never be able to happen but better confirm that. */ 372 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 373 panic("initarm: Failed to align the kernel page directory"); 374 375 /* 376 * Allocate a page for the system page mapped to V0x00000000 377 * This page will just contain the system vectors and can be 378 * shared by all processes. 379 */ 380 alloc_pages(systempage.pv_pa, 1); 381 382 /* Allocate stacks for all modes */ 383 valloc_pages(irqstack, IRQ_STACK_SIZE); 384 valloc_pages(abtstack, ABT_STACK_SIZE); 385 valloc_pages(undstack, UND_STACK_SIZE); 386 valloc_pages(kernelstack, UPAGES); 387 388 /* Allocate enough pages for cleaning the Mini-Data cache. */ 389 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 390 valloc_pages(minidataclean, 1); 391 392 #ifdef VERBOSE_INIT_ARM 393 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 394 irqstack.pv_va); 395 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 396 abtstack.pv_va); 397 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 398 undstack.pv_va); 399 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 400 kernelstack.pv_va); 401 #endif 402 403 /* 404 * XXX Defer this to later so that we can reclaim the memory 405 * XXX used by the RedBoot page tables. 406 */ 407 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 408 409 /* 410 * Ok we have allocated physical pages for the primary kernel 411 * page tables 412 */ 413 414 #ifdef VERBOSE_INIT_ARM 415 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 416 #endif 417 418 /* 419 * Now we start construction of the L1 page table 420 * We start by mapping the L2 page tables into the L1. 421 * This means that we can replace L1 mappings later on if necessary 422 */ 423 l1pagetable = kernel_l1pt.pv_pa; 424 425 /* Map the L2 pages tables in the L1 page table */ 426 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 427 &kernel_pt_table[KERNEL_PT_SYS]); 428 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 429 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 430 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 431 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 432 &kernel_pt_table[KERNEL_PT_IOPXS]); 433 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 434 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 435 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 436 437 /* update the top of the kernel VM */ 438 pmap_curmaxkvaddr = 439 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 440 441 #ifdef VERBOSE_INIT_ARM 442 printf("Mapping kernel\n"); 443 #endif 444 445 /* Now we fill in the L2 pagetable for the kernel static code/data */ 446 { 447 extern char etext[], _end[]; 448 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 449 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 450 u_int logical; 451 452 textsize = (textsize + PGOFSET) & ~PGOFSET; 453 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 454 455 logical = 0x00200000; /* offset of kernel in RAM */ 456 457 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 458 physical_start + logical, textsize, 459 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 460 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 461 physical_start + logical, totalsize - textsize, 462 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 463 } 464 465 #ifdef VERBOSE_INIT_ARM 466 printf("Constructing L2 page tables\n"); 467 #endif 468 469 /* Map the stack pages */ 470 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 471 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 472 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 473 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 474 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 475 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 476 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 477 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 478 479 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 480 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 481 482 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 483 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 484 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 485 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 486 } 487 488 /* Map the Mini-Data cache clean area. */ 489 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 490 minidataclean.pv_pa); 491 492 /* Map the vector page. */ 493 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 494 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 495 496 /* Map the statically mapped devices. */ 497 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 498 499 /* 500 * Give the XScale global cache clean code an appropriately 501 * sized chunk of unmapped VA space starting at 0xff000000 502 * (our device mappings end before this address). 503 */ 504 xscale_cache_clean_addr = 0xff000000U; 505 506 /* 507 * Now we have the real page tables in place so we can switch to them. 508 * Once this is done we will be running with the REAL kernel page 509 * tables. 510 */ 511 512 /* 513 * Update the physical_freestart/physical_freeend/free_pages 514 * variables. 515 */ 516 { 517 extern char _end[]; 518 519 physical_freestart = physical_start + 520 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 521 KERNEL_BASE); 522 physical_freeend = physical_end; 523 free_pages = 524 (physical_freeend - physical_freestart) / PAGE_SIZE; 525 } 526 527 /* Switch tables */ 528 #ifdef VERBOSE_INIT_ARM 529 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 530 physical_freestart, free_pages, free_pages); 531 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 532 #endif 533 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 534 cpu_setttb(kernel_l1pt.pv_pa, true); 535 cpu_tlb_flushID(); 536 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 537 538 /* 539 * Moved from cpu_startup() as data_abort_handler() references 540 * this during uvm init 541 */ 542 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("done!\n"); 546 #endif 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("bootstrap done.\n"); 550 #endif 551 552 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 553 554 /* 555 * Pages were allocated during the secondary bootstrap for the 556 * stacks for different CPU modes. 557 * We must now set the r13 registers in the different CPU modes to 558 * point to these stacks. 559 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 560 * of the stack memory. 561 */ 562 #ifdef VERBOSE_INIT_ARM 563 printf("init subsystems: stacks "); 564 #endif 565 566 set_stackptr(PSR_IRQ32_MODE, 567 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 568 set_stackptr(PSR_ABT32_MODE, 569 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 570 set_stackptr(PSR_UND32_MODE, 571 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 572 573 /* 574 * Well we should set a data abort handler. 575 * Once things get going this will change as we will need a proper 576 * handler. 577 * Until then we will use a handler that just panics but tells us 578 * why. 579 * Initialisation of the vectors will just panic on a data abort. 580 * This just fills in a slightly better one. 581 */ 582 #ifdef VERBOSE_INIT_ARM 583 printf("vectors "); 584 #endif 585 data_abort_handler_address = (u_int)data_abort_handler; 586 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 587 undefined_handler_address = (u_int)undefinedinstruction_bounce; 588 589 /* Initialise the undefined instruction handlers */ 590 #ifdef VERBOSE_INIT_ARM 591 printf("undefined "); 592 #endif 593 undefined_init(); 594 595 /* Load memory into UVM. */ 596 #ifdef VERBOSE_INIT_ARM 597 printf("page "); 598 #endif 599 uvm_md_init(); 600 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 601 atop(physical_freestart), atop(physical_freeend), 602 VM_FREELIST_DEFAULT); 603 604 /* Boot strap pmap telling it where the kernel page table is */ 605 #ifdef VERBOSE_INIT_ARM 606 printf("pmap "); 607 #endif 608 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 609 610 /* Setup the IRQ system */ 611 #ifdef VERBOSE_INIT_ARM 612 printf("irq "); 613 #endif 614 i80321_intr_init(); 615 616 #ifdef VERBOSE_INIT_ARM 617 printf("done.\n"); 618 #endif 619 620 #ifdef BOOTHOWTO 621 boothowto = BOOTHOWTO; 622 #endif 623 624 #ifdef DDB 625 db_machine_init(); 626 if (boothowto & RB_KDB) 627 Debugger(); 628 #endif 629 630 /* We return the new stack pointer address */ 631 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 632 } 633 634 /* 635 * void cpu_reboot(int howto, char *bootstr) 636 * 637 * Reboots the system 638 * 639 * Deal with any syncing, unmounting, dumping and shutdown hooks, 640 * then reset the CPU. 641 */ 642 void 643 cpu_reboot(int howto, char *bootstr) 644 { 645 646 /* 647 * If we are still cold then hit the air brakes 648 * and crash to earth fast 649 */ 650 if (cold) { 651 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 652 howto |= RB_HALT; 653 goto haltsys; 654 } 655 656 /* Disable console buffering */ 657 658 /* 659 * If RB_NOSYNC was not specified sync the discs. 660 * Note: Unless cold is set to 1 here, syslogd will die during the 661 * unmount. It looks like syslogd is getting woken up only to find 662 * that it cannot page part of the binary in as the filesystem has 663 * been unmounted. 664 */ 665 if ((howto & RB_NOSYNC) == 0) { 666 bootsync(); 667 /*resettodr();*/ 668 } 669 670 /* wait 1s */ 671 delay(1 * 1000 * 1000); 672 673 /* Say NO to interrupts */ 674 splhigh(); 675 676 /* Do a dump if requested. */ 677 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 678 dumpsys(); 679 } 680 681 haltsys: 682 /* Run any shutdown hooks */ 683 doshutdownhooks(); 684 685 pmf_system_shutdown(boothowto); 686 687 /* Make sure IRQ's are disabled */ 688 IRQdisable; 689 690 if (howto & RB_HALT) { 691 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 692 delay(3 * 1000 * 1000); /* wait 3s */ 693 694 printf("SHUTDOWN FAILED!\n"); 695 printf("The operating system has halted.\n"); 696 printf("Please press any key to reboot.\n\n"); 697 cngetc(); 698 } 699 700 printf("rebooting...\n\r"); 701 702 (void)disable_interrupts(I32_bit|F32_bit); 703 cpu_idcache_wbinv_all(); 704 cpu_drain_writebuf(); 705 706 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 707 delay(1 * 1000 * 1000); /* wait 1s */ 708 709 /* ...and if that didn't work, just croak. */ 710 printf("RESET FAILED!\n"); 711 for (;;) { 712 continue; 713 } 714 } 715 716 /* 717 * console 718 */ 719 #include "com.h" 720 #if NCOM > 0 721 #include <dev/ic/comreg.h> 722 #include <dev/ic/comvar.h> 723 #endif 724 725 /* 726 * Define the default console speed for the board. This is generally 727 * what the firmware provided with the board defaults to. 728 */ 729 #ifndef CONSPEED 730 #define CONSPEED B115200 731 #endif /* ! CONSPEED */ 732 733 #ifndef CONUNIT 734 #define CONUNIT 0 735 #endif 736 737 #ifndef CONMODE 738 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 739 #endif 740 741 int comcnspeed = CONSPEED; 742 int comcnmode = CONMODE; 743 int comcnunit = CONUNIT; 744 745 #if KGDB 746 #ifndef KGDB_DEVNAME 747 #error Must define KGDB_DEVNAME 748 #endif 749 const char kgdb_devname[] = KGDB_DEVNAME; 750 751 #ifndef KGDB_DEVADDR 752 #error Must define KGDB_DEVADDR 753 #endif 754 unsigned long kgdb_devaddr = KGDB_DEVADDR; 755 756 #ifndef KGDB_DEVRATE 757 #define KGDB_DEVRATE CONSPEED 758 #endif 759 int kgdb_devrate = KGDB_DEVRATE; 760 761 #ifndef KGDB_DEVMODE 762 #define KGDB_DEVMODE CONMODE 763 #endif 764 int kgdb_devmode = KGDB_DEVMODE; 765 #endif /* KGDB */ 766 767 void 768 consinit(void) 769 { 770 static const bus_addr_t comcnaddrs[] = { 771 HDLG_UART1, /* com0 */ 772 }; 773 static int consinit_called; 774 775 if (consinit_called) 776 return; 777 consinit_called = 1; 778 779 /* 780 * Console devices are mapped VA==PA. Our devmap reflects 781 * this, so register it now so drivers can map the console 782 * device. 783 */ 784 pmap_devmap_register(hdlg_devmap); 785 786 #if NCOM > 0 787 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 788 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 789 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 790 #else 791 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 792 #endif 793 #if KGDB 794 #if NCOM > 0 795 if (strcmp(kgdb_devname, "com") == 0) { 796 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 797 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 798 } 799 #endif /* NCOM > 0 */ 800 #endif /* KGDB */ 801 } 802
Indexes created Wed Oct 01 15:09:59 GMT 2025