hdlg_machdep.c revision 1.23.16.2
1 /* $NetBSD: hdlg_machdep.c,v 1.23.16.2 2020/04/13 08:03:43 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 1.23.16.2 2020/04/13 08:03:43 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 #include "opt_pmap_debug.h" 83 84 #include <sys/param.h> 85 #include <sys/device.h> 86 #include <sys/systm.h> 87 #include <sys/kernel.h> 88 #include <sys/exec.h> 89 #include <sys/proc.h> 90 #include <sys/msgbuf.h> 91 #include <sys/reboot.h> 92 #include <sys/termios.h> 93 #include <sys/ksyms.h> 94 #include <sys/bus.h> 95 #include <sys/cpu.h> 96 97 #include <uvm/uvm_extern.h> 98 99 #include <dev/cons.h> 100 101 #include <machine/db_machdep.h> 102 #include <ddb/db_sym.h> 103 #include <ddb/db_extern.h> 104 105 #include <machine/bootconfig.h> 106 #include <arm/locore.h> 107 #include <arm/undefined.h> 108 109 #include <arm/arm32/machdep.h> 110 111 #include <arm/xscale/i80321reg.h> 112 #include <arm/xscale/i80321var.h> 113 114 #include <dev/pci/ppbreg.h> 115 116 #include <evbarm/hdl_g/hdlgreg.h> 117 #include <evbarm/hdl_g/hdlgvar.h> 118 #include <evbarm/hdl_g/obiovar.h> 119 120 #include "ksyms.h" 121 122 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 123 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 124 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 125 126 /* 127 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 128 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 129 */ 130 #define KERNEL_VM_SIZE 0x0C000000 131 132 BootConfig bootconfig; /* Boot config storage */ 133 char *boot_args = NULL; 134 char *boot_file = NULL; 135 136 vaddr_t physical_start; 137 vaddr_t physical_freestart; 138 vaddr_t physical_freeend; 139 vaddr_t physical_end; 140 u_int free_pages; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 pv_addr_t minidataclean; 148 149 paddr_t msgbufphys; 150 151 #ifdef PMAP_DEBUG 152 extern int pmap_debug_level; 153 #endif 154 155 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 156 157 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 158 #define KERNEL_PT_KERNEL_NUM 4 159 160 /* L2 table for mapping i80321 */ 161 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 162 163 /* L2 tables for mapping kernel VM */ 164 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 165 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 166 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 167 168 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 169 170 /* Prototypes */ 171 void consinit(void); 172 173 /* Static device mappings. */ 174 static const struct pmap_devmap hdlg_devmap[] = { 175 /* 176 * Map the on-board devices VA == PA so that we can access them 177 * with the MMU on or off. 178 */ 179 { 180 HDLG_OBIO_BASE, 181 HDLG_OBIO_BASE, 182 HDLG_OBIO_SIZE, 183 VM_PROT_READ|VM_PROT_WRITE, 184 PTE_NOCACHE, 185 }, 186 187 { 188 HDLG_IOW_VBASE, 189 VERDE_OUT_XLATE_IO_WIN0_BASE, 190 VERDE_OUT_XLATE_IO_WIN_SIZE, 191 VM_PROT_READ|VM_PROT_WRITE, 192 PTE_NOCACHE, 193 }, 194 195 { 196 HDLG_80321_VBASE, 197 VERDE_PMMR_BASE, 198 VERDE_PMMR_SIZE, 199 VM_PROT_READ|VM_PROT_WRITE, 200 PTE_NOCACHE, 201 }, 202 203 { 204 0, 205 0, 206 0, 207 0, 208 0, 209 } 210 }; 211 212 static void 213 hardclock_hook(void) 214 { 215 216 /* Nothing to do */ 217 } 218 219 /* 220 * vaddr_t initarm(...) 221 * 222 * Initial entry point on startup. This gets called before main() is 223 * entered. 224 * It should be responsible for setting up everything that must be 225 * in place when main is called. 226 * This includes 227 * Taking a copy of the boot configuration structure. 228 * Initialising the physical console so characters can be printed. 229 * Setting up page tables for the kernel 230 * Relocating the kernel to the bottom of physical memory 231 */ 232 vaddr_t 233 initarm(void *arg) 234 { 235 extern vaddr_t xscale_cache_clean_addr; 236 #ifdef DIAGNOSTIC 237 extern vsize_t xscale_minidata_clean_size; 238 #endif 239 int loop; 240 int loop1; 241 u_int l1pagetable; 242 paddr_t memstart; 243 psize_t memsize; 244 245 /* Calibrate the delay loop. */ 246 i80321_calibrate_delay(); 247 i80321_hardclock_hook = hardclock_hook; 248 249 /* 250 * Since we map the on-board devices VA==PA, and the kernel 251 * is running VA==PA, it's possible for us to initialize 252 * the console now. 253 */ 254 consinit(); 255 256 #ifdef VERBOSE_INIT_ARM 257 /* Talk to the user */ 258 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 259 #endif 260 261 /* 262 * Heads up ... Setup the CPU / MMU / TLB functions 263 */ 264 if (set_cpufuncs()) 265 panic("CPU not recognized!"); 266 267 /* 268 * We are currently running with the MMU enabled and the 269 * entire address space mapped VA==PA, except for the 270 * first 64M of RAM is also double-mapped at 0xc0000000. 271 * There is an L1 page table at 0xa0004000. 272 */ 273 274 /* 275 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 276 * registers. 277 */ 278 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 279 &memstart, &memsize); 280 281 #ifdef VERBOSE_INIT_ARM 282 printf("initarm: Configuring system ...\n"); 283 #endif 284 285 /* Fake bootconfig structure for the benefit of pmap.c */ 286 /* XXX must make the memory description h/w independent */ 287 bootconfig.dramblocks = 1; 288 bootconfig.dram[0].address = memstart; 289 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 290 291 /* 292 * Set up the variables that define the availablilty of 293 * physical memory. For now, we're going to set 294 * physical_freestart to 0xa0200000 (where the kernel 295 * was loaded), and allocate the memory we need downwards. 296 * If we get too close to the L1 table that we set up, we 297 * will panic. We will update physical_freestart and 298 * physical_freeend later to reflect what pmap_bootstrap() 299 * wants to see. 300 * 301 * XXX pmap_bootstrap() needs an enema. 302 */ 303 physical_start = bootconfig.dram[0].address; 304 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 305 306 physical_freestart = 0xa0009000UL; 307 physical_freeend = 0xa0200000UL; 308 309 physmem = (physical_end - physical_start) / PAGE_SIZE; 310 311 #ifdef VERBOSE_INIT_ARM 312 /* Tell the user about the memory */ 313 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 314 physical_start, physical_end - 1); 315 #endif 316 317 /* 318 * Okay, the kernel starts 2MB in from the bottom of physical 319 * memory. We are going to allocate our bootstrap pages downwards 320 * from there. 321 * 322 * We need to allocate some fixed page tables to get the kernel 323 * going. We allocate one page directory and a number of page 324 * tables and store the physical addresses in the kernel_pt_table 325 * array. 326 * 327 * The kernel page directory must be on a 16K boundary. The page 328 * tables must be on 4K boundaries. What we do is allocate the 329 * page directory on the first 16K boundary that we encounter, and 330 * the page tables on 4K boundaries otherwise. Since we allocate 331 * at least 3 L2 page tables, we are guaranteed to encounter at 332 * least one 16K aligned region. 333 */ 334 335 #ifdef VERBOSE_INIT_ARM 336 printf("Allocating page tables\n"); 337 #endif 338 339 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 340 341 #ifdef VERBOSE_INIT_ARM 342 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 343 physical_freestart, free_pages, free_pages); 344 #endif 345 346 /* Define a macro to simplify memory allocation */ 347 #define valloc_pages(var, np) \ 348 alloc_pages((var).pv_pa, (np)); \ 349 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 350 351 #define alloc_pages(var, np) \ 352 physical_freeend -= ((np) * PAGE_SIZE); \ 353 if (physical_freeend < physical_freestart) \ 354 panic("initarm: out of memory"); \ 355 (var) = physical_freeend; \ 356 free_pages -= (np); \ 357 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 358 359 loop1 = 0; 360 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 361 /* Are we 16KB aligned for an L1 ? */ 362 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 363 && kernel_l1pt.pv_pa == 0) { 364 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 365 } else { 366 valloc_pages(kernel_pt_table[loop1], 367 L2_TABLE_SIZE / PAGE_SIZE); 368 ++loop1; 369 } 370 } 371 372 /* This should never be able to happen but better confirm that. */ 373 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 374 panic("initarm: Failed to align the kernel page directory"); 375 376 /* 377 * Allocate a page for the system page mapped to V0x00000000 378 * This page will just contain the system vectors and can be 379 * shared by all processes. 380 */ 381 alloc_pages(systempage.pv_pa, 1); 382 383 /* Allocate stacks for all modes */ 384 valloc_pages(irqstack, IRQ_STACK_SIZE); 385 valloc_pages(abtstack, ABT_STACK_SIZE); 386 valloc_pages(undstack, UND_STACK_SIZE); 387 valloc_pages(kernelstack, UPAGES); 388 389 /* Allocate enough pages for cleaning the Mini-Data cache. */ 390 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 391 valloc_pages(minidataclean, 1); 392 393 #ifdef VERBOSE_INIT_ARM 394 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 395 irqstack.pv_va); 396 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 397 abtstack.pv_va); 398 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 399 undstack.pv_va); 400 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 401 kernelstack.pv_va); 402 #endif 403 404 /* 405 * XXX Defer this to later so that we can reclaim the memory 406 * XXX used by the RedBoot page tables. 407 */ 408 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 409 410 /* 411 * Ok we have allocated physical pages for the primary kernel 412 * page tables 413 */ 414 415 #ifdef VERBOSE_INIT_ARM 416 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 417 #endif 418 419 /* 420 * Now we start construction of the L1 page table 421 * We start by mapping the L2 page tables into the L1. 422 * This means that we can replace L1 mappings later on if necessary 423 */ 424 l1pagetable = kernel_l1pt.pv_pa; 425 426 /* Map the L2 pages tables in the L1 page table */ 427 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 428 &kernel_pt_table[KERNEL_PT_SYS]); 429 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 430 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 431 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 432 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 433 &kernel_pt_table[KERNEL_PT_IOPXS]); 434 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 435 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 436 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 437 438 /* update the top of the kernel VM */ 439 pmap_curmaxkvaddr = 440 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 441 442 #ifdef VERBOSE_INIT_ARM 443 printf("Mapping kernel\n"); 444 #endif 445 446 /* Now we fill in the L2 pagetable for the kernel static code/data */ 447 { 448 extern char etext[], _end[]; 449 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 450 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 451 u_int logical; 452 453 textsize = (textsize + PGOFSET) & ~PGOFSET; 454 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 455 456 logical = 0x00200000; /* offset of kernel in RAM */ 457 458 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 459 physical_start + logical, textsize, 460 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 461 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 462 physical_start + logical, totalsize - textsize, 463 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 464 } 465 466 #ifdef VERBOSE_INIT_ARM 467 printf("Constructing L2 page tables\n"); 468 #endif 469 470 /* Map the stack pages */ 471 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 472 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 473 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 474 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 475 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 476 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 477 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 478 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 479 480 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 481 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 482 483 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 484 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 485 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 486 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 487 } 488 489 /* Map the Mini-Data cache clean area. */ 490 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 491 minidataclean.pv_pa); 492 493 /* Map the vector page. */ 494 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 495 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 496 497 /* Map the statically mapped devices. */ 498 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 499 500 /* 501 * Give the XScale global cache clean code an appropriately 502 * sized chunk of unmapped VA space starting at 0xff000000 503 * (our device mappings end before this address). 504 */ 505 xscale_cache_clean_addr = 0xff000000U; 506 507 /* 508 * Now we have the real page tables in place so we can switch to them. 509 * Once this is done we will be running with the REAL kernel page 510 * tables. 511 */ 512 513 /* 514 * Update the physical_freestart/physical_freeend/free_pages 515 * variables. 516 */ 517 { 518 extern char _end[]; 519 520 physical_freestart = physical_start + 521 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 522 KERNEL_BASE); 523 physical_freeend = physical_end; 524 free_pages = 525 (physical_freeend - physical_freestart) / PAGE_SIZE; 526 } 527 528 /* Switch tables */ 529 #ifdef VERBOSE_INIT_ARM 530 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 531 physical_freestart, free_pages, free_pages); 532 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 533 #endif 534 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 535 cpu_setttb(kernel_l1pt.pv_pa, true); 536 cpu_tlb_flushID(); 537 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 538 539 /* 540 * Moved from cpu_startup() as data_abort_handler() references 541 * this during uvm init 542 */ 543 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 544 545 #ifdef VERBOSE_INIT_ARM 546 printf("done!\n"); 547 #endif 548 549 #ifdef VERBOSE_INIT_ARM 550 printf("bootstrap done.\n"); 551 #endif 552 553 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 554 555 /* 556 * Pages were allocated during the secondary bootstrap for the 557 * stacks for different CPU modes. 558 * We must now set the r13 registers in the different CPU modes to 559 * point to these stacks. 560 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 561 * of the stack memory. 562 */ 563 #ifdef VERBOSE_INIT_ARM 564 printf("init subsystems: stacks "); 565 #endif 566 567 set_stackptr(PSR_IRQ32_MODE, 568 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 569 set_stackptr(PSR_ABT32_MODE, 570 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 571 set_stackptr(PSR_UND32_MODE, 572 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 573 574 /* 575 * Well we should set a data abort handler. 576 * Once things get going this will change as we will need a proper 577 * handler. 578 * Until then we will use a handler that just panics but tells us 579 * why. 580 * Initialisation of the vectors will just panic on a data abort. 581 * This just fills in a slightly better one. 582 */ 583 #ifdef VERBOSE_INIT_ARM 584 printf("vectors "); 585 #endif 586 data_abort_handler_address = (u_int)data_abort_handler; 587 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 588 undefined_handler_address = (u_int)undefinedinstruction_bounce; 589 590 /* Initialise the undefined instruction handlers */ 591 #ifdef VERBOSE_INIT_ARM 592 printf("undefined "); 593 #endif 594 undefined_init(); 595 596 /* Load memory into UVM. */ 597 #ifdef VERBOSE_INIT_ARM 598 printf("page "); 599 #endif 600 uvm_md_init(); 601 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 602 atop(physical_freestart), atop(physical_freeend), 603 VM_FREELIST_DEFAULT); 604 605 /* Boot strap pmap telling it where managed kernel virtual memory is */ 606 #ifdef VERBOSE_INIT_ARM 607 printf("pmap "); 608 #endif 609 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 610 611 /* Setup the IRQ system */ 612 #ifdef VERBOSE_INIT_ARM 613 printf("irq "); 614 #endif 615 i80321_intr_init(); 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("done.\n"); 619 #endif 620 621 #ifdef BOOTHOWTO 622 boothowto = BOOTHOWTO; 623 #endif 624 625 #ifdef DDB 626 db_machine_init(); 627 if (boothowto & RB_KDB) 628 Debugger(); 629 #endif 630 631 /* We return the new stack pointer address */ 632 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 633 } 634 635 /* 636 * void cpu_reboot(int howto, char *bootstr) 637 * 638 * Reboots the system 639 * 640 * Deal with any syncing, unmounting, dumping and shutdown hooks, 641 * then reset the CPU. 642 */ 643 void 644 cpu_reboot(int howto, char *bootstr) 645 { 646 647 /* 648 * If we are still cold then hit the air brakes 649 * and crash to earth fast 650 */ 651 if (cold) { 652 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 653 howto |= RB_HALT; 654 goto haltsys; 655 } 656 657 /* Disable console buffering */ 658 659 /* 660 * If RB_NOSYNC was not specified sync the discs. 661 * Note: Unless cold is set to 1 here, syslogd will die during the 662 * unmount. It looks like syslogd is getting woken up only to find 663 * that it cannot page part of the binary in as the filesystem has 664 * been unmounted. 665 */ 666 if ((howto & RB_NOSYNC) == 0) { 667 bootsync(); 668 /*resettodr();*/ 669 } 670 671 /* wait 1s */ 672 delay(1 * 1000 * 1000); 673 674 /* Say NO to interrupts */ 675 splhigh(); 676 677 /* Do a dump if requested. */ 678 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 679 dumpsys(); 680 } 681 682 haltsys: 683 /* Run any shutdown hooks */ 684 doshutdownhooks(); 685 686 pmf_system_shutdown(boothowto); 687 688 /* Make sure IRQ's are disabled */ 689 IRQdisable; 690 691 if (howto & RB_HALT) { 692 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 693 delay(3 * 1000 * 1000); /* wait 3s */ 694 695 printf("SHUTDOWN FAILED!\n"); 696 printf("The operating system has halted.\n"); 697 printf("Please press any key to reboot.\n\n"); 698 cngetc(); 699 } 700 701 printf("rebooting...\n\r"); 702 703 (void)disable_interrupts(I32_bit|F32_bit); 704 cpu_idcache_wbinv_all(); 705 cpu_drain_writebuf(); 706 707 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 708 delay(1 * 1000 * 1000); /* wait 1s */ 709 710 /* ...and if that didn't work, just croak. */ 711 printf("RESET FAILED!\n"); 712 for (;;) { 713 continue; 714 } 715 } 716 717 /* 718 * console 719 */ 720 #include "com.h" 721 #if NCOM > 0 722 #include <dev/ic/comreg.h> 723 #include <dev/ic/comvar.h> 724 #endif 725 726 /* 727 * Define the default console speed for the board. This is generally 728 * what the firmware provided with the board defaults to. 729 */ 730 #ifndef CONSPEED 731 #define CONSPEED B115200 732 #endif /* ! CONSPEED */ 733 734 #ifndef CONUNIT 735 #define CONUNIT 0 736 #endif 737 738 #ifndef CONMODE 739 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 740 #endif 741 742 int comcnspeed = CONSPEED; 743 int comcnmode = CONMODE; 744 int comcnunit = CONUNIT; 745 746 #if KGDB 747 #ifndef KGDB_DEVNAME 748 #error Must define KGDB_DEVNAME 749 #endif 750 const char kgdb_devname[] = KGDB_DEVNAME; 751 752 #ifndef KGDB_DEVADDR 753 #error Must define KGDB_DEVADDR 754 #endif 755 unsigned long kgdb_devaddr = KGDB_DEVADDR; 756 757 #ifndef KGDB_DEVRATE 758 #define KGDB_DEVRATE CONSPEED 759 #endif 760 int kgdb_devrate = KGDB_DEVRATE; 761 762 #ifndef KGDB_DEVMODE 763 #define KGDB_DEVMODE CONMODE 764 #endif 765 int kgdb_devmode = KGDB_DEVMODE; 766 #endif /* KGDB */ 767 768 void 769 consinit(void) 770 { 771 static const bus_addr_t comcnaddrs[] = { 772 HDLG_UART1, /* com0 */ 773 }; 774 static int consinit_called; 775 776 if (consinit_called) 777 return; 778 consinit_called = 1; 779 780 /* 781 * Console devices are mapped VA==PA. Our devmap reflects 782 * this, so register it now so drivers can map the console 783 * device. 784 */ 785 pmap_devmap_register(hdlg_devmap); 786 787 #if NCOM > 0 788 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 789 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 790 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 791 #else 792 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 793 #endif 794 #if KGDB 795 #if NCOM > 0 796 if (strcmp(kgdb_devname, "com") == 0) { 797 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 798 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 799 } 800 #endif /* NCOM > 0 */ 801 #endif /* KGDB */ 802 } 803
Indexes created Wed Oct 01 15:09:59 GMT 2025