1 /* $NetBSD: hdlg_machdep.c,v 1.5 2008/01/19 13:11:15 chris 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 dependant 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 1.5 2008/01/19 13:11:15 chris Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 #include "opt_pmap_debug.h" 81 82 #include <sys/param.h> 83 #include <sys/device.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/exec.h> 87 #include <sys/proc.h> 88 #include <sys/msgbuf.h> 89 #include <sys/reboot.h> 90 #include <sys/termios.h> 91 #include <sys/ksyms.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <dev/cons.h> 96 97 #include <machine/db_machdep.h> 98 #include <ddb/db_sym.h> 99 #include <ddb/db_extern.h> 100 101 #include <machine/bootconfig.h> 102 #include <machine/bus.h> 103 #include <machine/cpu.h> 104 #include <machine/frame.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/xscale/i80321reg.h> 110 #include <arm/xscale/i80321var.h> 111 112 #include <dev/pci/ppbreg.h> 113 114 #include <evbarm/hdl_g/hdlgreg.h> 115 #include <evbarm/hdl_g/hdlgvar.h> 116 #include <evbarm/hdl_g/obiovar.h> 117 118 #include "ksyms.h" 119 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124 /* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128 #define KERNEL_VM_SIZE 0x0C000000 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependant as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 * 135 * XXX Not actually used on hdlg -- clean up the generic 136 * ARM code. 137 */ 138 u_int cpu_reset_address = 0x00000000; 139 140 /* Define various stack sizes in pages */ 141 #define IRQ_STACK_SIZE 1 142 #define ABT_STACK_SIZE 1 143 #define UND_STACK_SIZE 1 144 145 BootConfig bootconfig; /* Boot config storage */ 146 char *boot_args = NULL; 147 char *boot_file = NULL; 148 149 vm_offset_t physical_start; 150 vm_offset_t physical_freestart; 151 vm_offset_t physical_freeend; 152 vm_offset_t physical_end; 153 u_int free_pages; 154 vm_offset_t pagetables_start; 155 int physmem = 0; 156 157 /*int debug_flags;*/ 158 #ifndef PMAP_STATIC_L1S 159 int max_processes = 64; /* Default number */ 160 #endif /* !PMAP_STATIC_L1S */ 161 162 /* Physical and virtual addresses for some global pages */ 163 pv_addr_t systempage; 164 pv_addr_t irqstack; 165 pv_addr_t undstack; 166 pv_addr_t abtstack; 167 pv_addr_t kernelstack; 168 pv_addr_t minidataclean; 169 170 vm_offset_t msgbufphys; 171 172 extern u_int data_abort_handler_address; 173 extern u_int prefetch_abort_handler_address; 174 extern u_int undefined_handler_address; 175 176 #ifdef PMAP_DEBUG 177 extern int pmap_debug_level; 178 #endif 179 180 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 181 182 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 183 #define KERNEL_PT_KERNEL_NUM 4 184 185 /* L2 table for mapping i80321 */ 186 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 187 188 /* L2 tables for mapping kernel VM */ 189 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 190 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 191 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 192 193 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 194 195 struct user *proc0paddr; 196 197 /* Prototypes */ 198 void consinit(void); 199 200 /* Static device mappings. */ 201 static const struct pmap_devmap hdlg_devmap[] = { 202 /* 203 * Map the on-board devices VA == PA so that we can access them 204 * with the MMU on or off. 205 */ 206 { 207 HDLG_OBIO_BASE, 208 HDLG_OBIO_BASE, 209 HDLG_OBIO_SIZE, 210 VM_PROT_READ|VM_PROT_WRITE, 211 PTE_NOCACHE, 212 }, 213 214 { 215 HDLG_IOW_VBASE, 216 VERDE_OUT_XLATE_IO_WIN0_BASE, 217 VERDE_OUT_XLATE_IO_WIN_SIZE, 218 VM_PROT_READ|VM_PROT_WRITE, 219 PTE_NOCACHE, 220 }, 221 222 { 223 HDLG_80321_VBASE, 224 VERDE_PMMR_BASE, 225 VERDE_PMMR_SIZE, 226 VM_PROT_READ|VM_PROT_WRITE, 227 PTE_NOCACHE, 228 }, 229 230 { 231 0, 232 0, 233 0, 234 0, 235 0, 236 } 237 }; 238 239 static void 240 hardclock_hook(void) 241 { 242 243 /* Nothing to do */ 244 } 245 246 /* 247 * u_int initarm(...) 248 * 249 * Initial entry point on startup. This gets called before main() is 250 * entered. 251 * It should be responsible for setting up everything that must be 252 * in place when main is called. 253 * This includes 254 * Taking a copy of the boot configuration structure. 255 * Initialising the physical console so characters can be printed. 256 * Setting up page tables for the kernel 257 * Relocating the kernel to the bottom of physical memory 258 */ 259 u_int 260 initarm(void *arg) 261 { 262 extern vaddr_t xscale_cache_clean_addr; 263 #ifdef DIAGNOSTIC 264 extern vsize_t xscale_minidata_clean_size; 265 #endif 266 int loop; 267 int loop1; 268 u_int l1pagetable; 269 pv_addr_t kernel_l1pt; 270 paddr_t memstart; 271 psize_t memsize; 272 273 /* Calibrate the delay loop. */ 274 i80321_calibrate_delay(); 275 i80321_hardclock_hook = hardclock_hook; 276 277 /* 278 * Since we map the on-board devices VA==PA, and the kernel 279 * is running VA==PA, it's possible for us to initialize 280 * the console now. 281 */ 282 consinit(); 283 284 #ifdef VERBOSE_INIT_ARM 285 /* Talk to the user */ 286 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 287 #endif 288 289 /* 290 * Heads up ... Setup the CPU / MMU / TLB functions 291 */ 292 if (set_cpufuncs()) 293 panic("CPU not recognized!"); 294 295 /* 296 * We are currently running with the MMU enabled and the 297 * entire address space mapped VA==PA, except for the 298 * first 64M of RAM is also double-mapped at 0xc0000000. 299 * There is an L1 page table at 0xa0004000. 300 */ 301 302 /* 303 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 304 * registers. 305 */ 306 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 307 &memstart, &memsize); 308 309 #ifdef VERBOSE_INIT_ARM 310 printf("initarm: Configuring system ...\n"); 311 #endif 312 313 /* Fake bootconfig structure for the benefit of pmap.c */ 314 /* XXX must make the memory description h/w independent */ 315 bootconfig.dramblocks = 1; 316 bootconfig.dram[0].address = memstart; 317 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 318 319 /* 320 * Set up the variables that define the availablilty of 321 * physical memory. For now, we're going to set 322 * physical_freestart to 0xa0200000 (where the kernel 323 * was loaded), and allocate the memory we need downwards. 324 * If we get too close to the L1 table that we set up, we 325 * will panic. We will update physical_freestart and 326 * physical_freeend later to reflect what pmap_bootstrap() 327 * wants to see. 328 * 329 * XXX pmap_bootstrap() needs an enema. 330 */ 331 physical_start = bootconfig.dram[0].address; 332 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 333 334 physical_freestart = 0xa0009000UL; 335 physical_freeend = 0xa0200000UL; 336 337 physmem = (physical_end - physical_start) / PAGE_SIZE; 338 339 #ifdef VERBOSE_INIT_ARM 340 /* Tell the user about the memory */ 341 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 342 physical_start, physical_end - 1); 343 #endif 344 345 /* 346 * Okay, the kernel starts 2MB in from the bottom of physical 347 * memory. We are going to allocate our bootstrap pages downwards 348 * from there. 349 * 350 * We need to allocate some fixed page tables to get the kernel 351 * going. We allocate one page directory and a number of page 352 * tables and store the physical addresses in the kernel_pt_table 353 * array. 354 * 355 * The kernel page directory must be on a 16K boundary. The page 356 * tables must be on 4K boundaries. What we do is allocate the 357 * page directory on the first 16K boundary that we encounter, and 358 * the page tables on 4K boundaries otherwise. Since we allocate 359 * at least 3 L2 page tables, we are guaranteed to encounter at 360 * least one 16K aligned region. 361 */ 362 363 #ifdef VERBOSE_INIT_ARM 364 printf("Allocating page tables\n"); 365 #endif 366 367 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 368 369 #ifdef VERBOSE_INIT_ARM 370 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 371 physical_freestart, free_pages, free_pages); 372 #endif 373 374 /* Define a macro to simplify memory allocation */ 375 #define valloc_pages(var, np) \ 376 alloc_pages((var).pv_pa, (np)); \ 377 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 378 379 #define alloc_pages(var, np) \ 380 physical_freeend -= ((np) * PAGE_SIZE); \ 381 if (physical_freeend < physical_freestart) \ 382 panic("initarm: out of memory"); \ 383 (var) = physical_freeend; \ 384 free_pages -= (np); \ 385 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 386 387 loop1 = 0; 388 kernel_l1pt.pv_pa = 0; 389 kernel_l1pt.pv_va = 0; 390 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 391 /* Are we 16KB aligned for an L1 ? */ 392 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 393 && kernel_l1pt.pv_pa == 0) { 394 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 395 } else { 396 valloc_pages(kernel_pt_table[loop1], 397 L2_TABLE_SIZE / PAGE_SIZE); 398 ++loop1; 399 } 400 } 401 402 /* This should never be able to happen but better confirm that. */ 403 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 404 panic("initarm: Failed to align the kernel page directory"); 405 406 /* 407 * Allocate a page for the system page mapped to V0x00000000 408 * This page will just contain the system vectors and can be 409 * shared by all processes. 410 */ 411 alloc_pages(systempage.pv_pa, 1); 412 413 /* Allocate stacks for all modes */ 414 valloc_pages(irqstack, IRQ_STACK_SIZE); 415 valloc_pages(abtstack, ABT_STACK_SIZE); 416 valloc_pages(undstack, UND_STACK_SIZE); 417 valloc_pages(kernelstack, UPAGES); 418 419 /* Allocate enough pages for cleaning the Mini-Data cache. */ 420 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 421 valloc_pages(minidataclean, 1); 422 423 #ifdef VERBOSE_INIT_ARM 424 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 425 irqstack.pv_va); 426 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 427 abtstack.pv_va); 428 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 429 undstack.pv_va); 430 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 431 kernelstack.pv_va); 432 #endif 433 434 /* 435 * XXX Defer this to later so that we can reclaim the memory 436 * XXX used by the RedBoot page tables. 437 */ 438 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 439 440 /* 441 * Ok we have allocated physical pages for the primary kernel 442 * page tables 443 */ 444 445 #ifdef VERBOSE_INIT_ARM 446 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 447 #endif 448 449 /* 450 * Now we start construction of the L1 page table 451 * We start by mapping the L2 page tables into the L1. 452 * This means that we can replace L1 mappings later on if necessary 453 */ 454 l1pagetable = kernel_l1pt.pv_pa; 455 456 /* Map the L2 pages tables in the L1 page table */ 457 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 458 &kernel_pt_table[KERNEL_PT_SYS]); 459 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 460 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 461 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 462 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 463 &kernel_pt_table[KERNEL_PT_IOPXS]); 464 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 465 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 466 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 467 468 /* update the top of the kernel VM */ 469 pmap_curmaxkvaddr = 470 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 471 472 #ifdef VERBOSE_INIT_ARM 473 printf("Mapping kernel\n"); 474 #endif 475 476 /* Now we fill in the L2 pagetable for the kernel static code/data */ 477 { 478 extern char etext[], _end[]; 479 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 480 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 481 u_int logical; 482 483 textsize = (textsize + PGOFSET) & ~PGOFSET; 484 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 485 486 logical = 0x00200000; /* offset of kernel in RAM */ 487 488 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 489 physical_start + logical, textsize, 490 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 491 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 492 physical_start + logical, totalsize - textsize, 493 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 494 } 495 496 #ifdef VERBOSE_INIT_ARM 497 printf("Constructing L2 page tables\n"); 498 #endif 499 500 /* Map the stack pages */ 501 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 502 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 503 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 504 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 505 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 506 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 507 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 508 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 509 510 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 511 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 512 513 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 514 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 515 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 516 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 517 } 518 519 /* Map the Mini-Data cache clean area. */ 520 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 521 minidataclean.pv_pa); 522 523 /* Map the vector page. */ 524 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 525 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 526 527 /* Map the statically mapped devices. */ 528 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 529 530 /* 531 * Give the XScale global cache clean code an appropriately 532 * sized chunk of unmapped VA space starting at 0xff000000 533 * (our device mappings end before this address). 534 */ 535 xscale_cache_clean_addr = 0xff000000U; 536 537 /* 538 * Now we have the real page tables in place so we can switch to them. 539 * Once this is done we will be running with the REAL kernel page 540 * tables. 541 */ 542 543 /* 544 * Update the physical_freestart/physical_freeend/free_pages 545 * variables. 546 */ 547 { 548 extern char _end[]; 549 550 physical_freestart = physical_start + 551 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 552 KERNEL_BASE); 553 physical_freeend = physical_end; 554 free_pages = 555 (physical_freeend - physical_freestart) / PAGE_SIZE; 556 } 557 558 /* Switch tables */ 559 #ifdef VERBOSE_INIT_ARM 560 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 561 physical_freestart, free_pages, free_pages); 562 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 563 #endif 564 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 565 setttb(kernel_l1pt.pv_pa); 566 cpu_tlb_flushID(); 567 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 568 569 /* 570 * Moved from cpu_startup() as data_abort_handler() references 571 * this during uvm init 572 */ 573 proc0paddr = (struct user *)kernelstack.pv_va; 574 lwp0.l_addr = proc0paddr; 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("done!\n"); 578 #endif 579 580 #ifdef VERBOSE_INIT_ARM 581 printf("bootstrap done.\n"); 582 #endif 583 584 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 585 586 /* 587 * Pages were allocated during the secondary bootstrap for the 588 * stacks for different CPU modes. 589 * We must now set the r13 registers in the different CPU modes to 590 * point to these stacks. 591 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 592 * of the stack memory. 593 */ 594 #ifdef VERBOSE_INIT_ARM 595 printf("init subsystems: stacks "); 596 #endif 597 598 set_stackptr(PSR_IRQ32_MODE, 599 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 600 set_stackptr(PSR_ABT32_MODE, 601 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 602 set_stackptr(PSR_UND32_MODE, 603 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 604 605 /* 606 * Well we should set a data abort handler. 607 * Once things get going this will change as we will need a proper 608 * handler. 609 * Until then we will use a handler that just panics but tells us 610 * why. 611 * Initialisation of the vectors will just panic on a data abort. 612 * This just fills in a slightly better one. 613 */ 614 #ifdef VERBOSE_INIT_ARM 615 printf("vectors "); 616 #endif 617 data_abort_handler_address = (u_int)data_abort_handler; 618 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 619 undefined_handler_address = (u_int)undefinedinstruction_bounce; 620 621 /* Initialise the undefined instruction handlers */ 622 #ifdef VERBOSE_INIT_ARM 623 printf("undefined "); 624 #endif 625 undefined_init(); 626 627 /* Load memory into UVM. */ 628 #ifdef VERBOSE_INIT_ARM 629 printf("page "); 630 #endif 631 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 632 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 633 atop(physical_freestart), atop(physical_freeend), 634 VM_FREELIST_DEFAULT); 635 636 /* Boot strap pmap telling it where the kernel page table is */ 637 #ifdef VERBOSE_INIT_ARM 638 printf("pmap "); 639 #endif 640 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 641 KERNEL_VM_BASE + KERNEL_VM_SIZE); 642 643 /* Setup the IRQ system */ 644 #ifdef VERBOSE_INIT_ARM 645 printf("irq "); 646 #endif 647 i80321_intr_init(); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("done.\n"); 651 #endif 652 653 #ifdef BOOTHOWTO 654 boothowto = BOOTHOWTO; 655 #endif 656 657 #if NKSYMS || defined(DDB) || defined(LKM) 658 /* Firmware doesn't load symbols. */ 659 ksyms_init(0, NULL, NULL); 660 #endif 661 662 #ifdef DDB 663 db_machine_init(); 664 if (boothowto & RB_KDB) 665 Debugger(); 666 #endif 667 668 /* We return the new stack pointer address */ 669 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 670 } 671 672 /* 673 * void cpu_reboot(int howto, char *bootstr) 674 * 675 * Reboots the system 676 * 677 * Deal with any syncing, unmounting, dumping and shutdown hooks, 678 * then reset the CPU. 679 */ 680 void 681 cpu_reboot(int howto, char *bootstr) 682 { 683 684 /* 685 * If we are still cold then hit the air brakes 686 * and crash to earth fast 687 */ 688 if (cold) { 689 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 690 howto |= RB_HALT; 691 goto haltsys; 692 } 693 694 /* Disable console buffering */ 695 696 /* 697 * If RB_NOSYNC was not specified sync the discs. 698 * Note: Unless cold is set to 1 here, syslogd will die during the 699 * unmount. It looks like syslogd is getting woken up only to find 700 * that it cannot page part of the binary in as the filesystem has 701 * been unmounted. 702 */ 703 if ((howto & RB_NOSYNC) == 0) { 704 bootsync(); 705 /*resettodr();*/ 706 } 707 708 /* wait 1s */ 709 delay(1 * 1000 * 1000); 710 711 /* Say NO to interrupts */ 712 splhigh(); 713 714 /* Do a dump if requested. */ 715 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 716 dumpsys(); 717 } 718 719 haltsys: 720 /* Run any shutdown hooks */ 721 doshutdownhooks(); 722 723 /* Make sure IRQ's are disabled */ 724 IRQdisable; 725 726 if (howto & RB_HALT) { 727 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 728 delay(3 * 1000 * 1000); /* wait 3s */ 729 730 printf("SHUTDOWN FAILED!\n"); 731 printf("The operating system has halted.\n"); 732 printf("Please press any key to reboot.\n\n"); 733 cngetc(); 734 } 735 736 printf("rebooting...\n\r"); 737 738 (void)disable_interrupts(I32_bit|F32_bit); 739 cpu_idcache_wbinv_all(); 740 cpu_drain_writebuf(); 741 742 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 743 delay(1 * 1000 * 1000); /* wait 1s */ 744 745 /* ...and if that didn't work, just croak. */ 746 printf("RESET FAILED!\n"); 747 for (;;) { 748 continue; 749 } 750 } 751 752 /* 753 * console 754 */ 755 #include "com.h" 756 #if NCOM > 0 757 #include <dev/ic/comreg.h> 758 #include <dev/ic/comvar.h> 759 #endif 760 761 /* 762 * Define the default console speed for the board. This is generally 763 * what the firmware provided with the board defaults to. 764 */ 765 #ifndef CONSPEED 766 #define CONSPEED B115200 767 #endif /* ! CONSPEED */ 768 769 #ifndef CONUNIT 770 #define CONUNIT 0 771 #endif 772 773 #ifndef CONMODE 774 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 775 #endif 776 777 int comcnspeed = CONSPEED; 778 int comcnmode = CONMODE; 779 int comcnunit = CONUNIT; 780 781 #if KGDB 782 #ifndef KGDB_DEVNAME 783 #error Must define KGDB_DEVNAME 784 #endif 785 const char kgdb_devname[] = KGDB_DEVNAME; 786 787 #ifndef KGDB_DEVADDR 788 #error Must define KGDB_DEVADDR 789 #endif 790 unsigned long kgdb_devaddr = KGDB_DEVADDR; 791 792 #ifndef KGDB_DEVRATE 793 #define KGDB_DEVRATE CONSPEED 794 #endif 795 int kgdb_devrate = KGDB_DEVRATE; 796 797 #ifndef KGDB_DEVMODE 798 #define KGDB_DEVMODE CONMODE 799 #endif 800 int kgdb_devmode = KGDB_DEVMODE; 801 #endif /* KGDB */ 802 803 void 804 consinit(void) 805 { 806 static const bus_addr_t comcnaddrs[] = { 807 HDLG_UART1, /* com0 */ 808 }; 809 static int consinit_called; 810 811 if (consinit_called) 812 return; 813 consinit_called = 1; 814 815 /* 816 * Console devices are mapped VA==PA. Our devmap reflects 817 * this, so register it now so drivers can map the console 818 * device. 819 */ 820 pmap_devmap_register(hdlg_devmap); 821 822 #if NCOM > 0 823 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 824 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 825 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 826 #else 827 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 828 #endif 829 #if KGDB 830 #if NCOM > 0 831 if (strcmp(kgdb_devname, "com") == 0) { 832 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 833 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 834 } 835 #endif /* NCOM > 0 */ 836 #endif /* KGDB */ 837 } 838