1 /* $NetBSD: hdlg_machdep.c,v 1.12 2009/11/27 03:23:06 rmind 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 1.12 2009/11/27 03:23:06 rmind 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; 155 156 /*int debug_flags;*/ 157 #ifndef PMAP_STATIC_L1S 158 int max_processes = 64; /* Default number */ 159 #endif /* !PMAP_STATIC_L1S */ 160 161 /* Physical and virtual addresses for some global pages */ 162 pv_addr_t irqstack; 163 pv_addr_t undstack; 164 pv_addr_t abtstack; 165 pv_addr_t kernelstack; 166 pv_addr_t minidataclean; 167 168 vm_offset_t msgbufphys; 169 170 extern u_int data_abort_handler_address; 171 extern u_int prefetch_abort_handler_address; 172 extern u_int undefined_handler_address; 173 174 #ifdef PMAP_DEBUG 175 extern int pmap_debug_level; 176 #endif 177 178 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 179 180 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 181 #define KERNEL_PT_KERNEL_NUM 4 182 183 /* L2 table for mapping i80321 */ 184 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 185 186 /* L2 tables for mapping kernel VM */ 187 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 188 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 189 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 190 191 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 192 193 /* Prototypes */ 194 void consinit(void); 195 196 /* Static device mappings. */ 197 static const struct pmap_devmap hdlg_devmap[] = { 198 /* 199 * Map the on-board devices VA == PA so that we can access them 200 * with the MMU on or off. 201 */ 202 { 203 HDLG_OBIO_BASE, 204 HDLG_OBIO_BASE, 205 HDLG_OBIO_SIZE, 206 VM_PROT_READ|VM_PROT_WRITE, 207 PTE_NOCACHE, 208 }, 209 210 { 211 HDLG_IOW_VBASE, 212 VERDE_OUT_XLATE_IO_WIN0_BASE, 213 VERDE_OUT_XLATE_IO_WIN_SIZE, 214 VM_PROT_READ|VM_PROT_WRITE, 215 PTE_NOCACHE, 216 }, 217 218 { 219 HDLG_80321_VBASE, 220 VERDE_PMMR_BASE, 221 VERDE_PMMR_SIZE, 222 VM_PROT_READ|VM_PROT_WRITE, 223 PTE_NOCACHE, 224 }, 225 226 { 227 0, 228 0, 229 0, 230 0, 231 0, 232 } 233 }; 234 235 static void 236 hardclock_hook(void) 237 { 238 239 /* Nothing to do */ 240 } 241 242 /* 243 * u_int initarm(...) 244 * 245 * Initial entry point on startup. This gets called before main() is 246 * entered. 247 * It should be responsible for setting up everything that must be 248 * in place when main is called. 249 * This includes 250 * Taking a copy of the boot configuration structure. 251 * Initialising the physical console so characters can be printed. 252 * Setting up page tables for the kernel 253 * Relocating the kernel to the bottom of physical memory 254 */ 255 u_int 256 initarm(void *arg) 257 { 258 extern vaddr_t xscale_cache_clean_addr; 259 #ifdef DIAGNOSTIC 260 extern vsize_t xscale_minidata_clean_size; 261 #endif 262 int loop; 263 int loop1; 264 u_int l1pagetable; 265 paddr_t memstart; 266 psize_t memsize; 267 268 /* Calibrate the delay loop. */ 269 i80321_calibrate_delay(); 270 i80321_hardclock_hook = hardclock_hook; 271 272 /* 273 * Since we map the on-board devices VA==PA, and the kernel 274 * is running VA==PA, it's possible for us to initialize 275 * the console now. 276 */ 277 consinit(); 278 279 #ifdef VERBOSE_INIT_ARM 280 /* Talk to the user */ 281 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 282 #endif 283 284 /* 285 * Heads up ... Setup the CPU / MMU / TLB functions 286 */ 287 if (set_cpufuncs()) 288 panic("CPU not recognized!"); 289 290 /* 291 * We are currently running with the MMU enabled and the 292 * entire address space mapped VA==PA, except for the 293 * first 64M of RAM is also double-mapped at 0xc0000000. 294 * There is an L1 page table at 0xa0004000. 295 */ 296 297 /* 298 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 299 * registers. 300 */ 301 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 302 &memstart, &memsize); 303 304 #ifdef VERBOSE_INIT_ARM 305 printf("initarm: Configuring system ...\n"); 306 #endif 307 308 /* Fake bootconfig structure for the benefit of pmap.c */ 309 /* XXX must make the memory description h/w independent */ 310 bootconfig.dramblocks = 1; 311 bootconfig.dram[0].address = memstart; 312 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 313 314 /* 315 * Set up the variables that define the availablilty of 316 * physical memory. For now, we're going to set 317 * physical_freestart to 0xa0200000 (where the kernel 318 * was loaded), and allocate the memory we need downwards. 319 * If we get too close to the L1 table that we set up, we 320 * will panic. We will update physical_freestart and 321 * physical_freeend later to reflect what pmap_bootstrap() 322 * wants to see. 323 * 324 * XXX pmap_bootstrap() needs an enema. 325 */ 326 physical_start = bootconfig.dram[0].address; 327 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 328 329 physical_freestart = 0xa0009000UL; 330 physical_freeend = 0xa0200000UL; 331 332 physmem = (physical_end - physical_start) / PAGE_SIZE; 333 334 #ifdef VERBOSE_INIT_ARM 335 /* Tell the user about the memory */ 336 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 337 physical_start, physical_end - 1); 338 #endif 339 340 /* 341 * Okay, the kernel starts 2MB in from the bottom of physical 342 * memory. We are going to allocate our bootstrap pages downwards 343 * from there. 344 * 345 * We need to allocate some fixed page tables to get the kernel 346 * going. We allocate one page directory and a number of page 347 * tables and store the physical addresses in the kernel_pt_table 348 * array. 349 * 350 * The kernel page directory must be on a 16K boundary. The page 351 * tables must be on 4K boundaries. What we do is allocate the 352 * page directory on the first 16K boundary that we encounter, and 353 * the page tables on 4K boundaries otherwise. Since we allocate 354 * at least 3 L2 page tables, we are guaranteed to encounter at 355 * least one 16K aligned region. 356 */ 357 358 #ifdef VERBOSE_INIT_ARM 359 printf("Allocating page tables\n"); 360 #endif 361 362 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 363 364 #ifdef VERBOSE_INIT_ARM 365 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 366 physical_freestart, free_pages, free_pages); 367 #endif 368 369 /* Define a macro to simplify memory allocation */ 370 #define valloc_pages(var, np) \ 371 alloc_pages((var).pv_pa, (np)); \ 372 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 373 374 #define alloc_pages(var, np) \ 375 physical_freeend -= ((np) * PAGE_SIZE); \ 376 if (physical_freeend < physical_freestart) \ 377 panic("initarm: out of memory"); \ 378 (var) = physical_freeend; \ 379 free_pages -= (np); \ 380 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 381 382 loop1 = 0; 383 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 384 /* Are we 16KB aligned for an L1 ? */ 385 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 386 && kernel_l1pt.pv_pa == 0) { 387 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 388 } else { 389 valloc_pages(kernel_pt_table[loop1], 390 L2_TABLE_SIZE / PAGE_SIZE); 391 ++loop1; 392 } 393 } 394 395 /* This should never be able to happen but better confirm that. */ 396 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 397 panic("initarm: Failed to align the kernel page directory"); 398 399 /* 400 * Allocate a page for the system page mapped to V0x00000000 401 * This page will just contain the system vectors and can be 402 * shared by all processes. 403 */ 404 alloc_pages(systempage.pv_pa, 1); 405 406 /* Allocate stacks for all modes */ 407 valloc_pages(irqstack, IRQ_STACK_SIZE); 408 valloc_pages(abtstack, ABT_STACK_SIZE); 409 valloc_pages(undstack, UND_STACK_SIZE); 410 valloc_pages(kernelstack, UPAGES); 411 412 /* Allocate enough pages for cleaning the Mini-Data cache. */ 413 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 414 valloc_pages(minidataclean, 1); 415 416 #ifdef VERBOSE_INIT_ARM 417 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 418 irqstack.pv_va); 419 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 420 abtstack.pv_va); 421 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 422 undstack.pv_va); 423 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 424 kernelstack.pv_va); 425 #endif 426 427 /* 428 * XXX Defer this to later so that we can reclaim the memory 429 * XXX used by the RedBoot page tables. 430 */ 431 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 432 433 /* 434 * Ok we have allocated physical pages for the primary kernel 435 * page tables 436 */ 437 438 #ifdef VERBOSE_INIT_ARM 439 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 440 #endif 441 442 /* 443 * Now we start construction of the L1 page table 444 * We start by mapping the L2 page tables into the L1. 445 * This means that we can replace L1 mappings later on if necessary 446 */ 447 l1pagetable = kernel_l1pt.pv_pa; 448 449 /* Map the L2 pages tables in the L1 page table */ 450 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 451 &kernel_pt_table[KERNEL_PT_SYS]); 452 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 453 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 454 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 455 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 456 &kernel_pt_table[KERNEL_PT_IOPXS]); 457 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 458 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 459 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 460 461 /* update the top of the kernel VM */ 462 pmap_curmaxkvaddr = 463 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 464 465 #ifdef VERBOSE_INIT_ARM 466 printf("Mapping kernel\n"); 467 #endif 468 469 /* Now we fill in the L2 pagetable for the kernel static code/data */ 470 { 471 extern char etext[], _end[]; 472 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 473 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 474 u_int logical; 475 476 textsize = (textsize + PGOFSET) & ~PGOFSET; 477 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 478 479 logical = 0x00200000; /* offset of kernel in RAM */ 480 481 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 482 physical_start + logical, textsize, 483 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 484 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 485 physical_start + logical, totalsize - textsize, 486 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 487 } 488 489 #ifdef VERBOSE_INIT_ARM 490 printf("Constructing L2 page tables\n"); 491 #endif 492 493 /* Map the stack pages */ 494 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 495 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 496 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 497 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 498 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 499 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 500 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 501 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 502 503 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 504 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 505 506 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 507 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 508 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 509 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 510 } 511 512 /* Map the Mini-Data cache clean area. */ 513 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 514 minidataclean.pv_pa); 515 516 /* Map the vector page. */ 517 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 518 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 519 520 /* Map the statically mapped devices. */ 521 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 522 523 /* 524 * Give the XScale global cache clean code an appropriately 525 * sized chunk of unmapped VA space starting at 0xff000000 526 * (our device mappings end before this address). 527 */ 528 xscale_cache_clean_addr = 0xff000000U; 529 530 /* 531 * Now we have the real page tables in place so we can switch to them. 532 * Once this is done we will be running with the REAL kernel page 533 * tables. 534 */ 535 536 /* 537 * Update the physical_freestart/physical_freeend/free_pages 538 * variables. 539 */ 540 { 541 extern char _end[]; 542 543 physical_freestart = physical_start + 544 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 545 KERNEL_BASE); 546 physical_freeend = physical_end; 547 free_pages = 548 (physical_freeend - physical_freestart) / PAGE_SIZE; 549 } 550 551 /* Switch tables */ 552 #ifdef VERBOSE_INIT_ARM 553 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 554 physical_freestart, free_pages, free_pages); 555 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 556 #endif 557 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 558 setttb(kernel_l1pt.pv_pa); 559 cpu_tlb_flushID(); 560 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 561 562 /* 563 * Moved from cpu_startup() as data_abort_handler() references 564 * this during uvm init 565 */ 566 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 567 568 #ifdef VERBOSE_INIT_ARM 569 printf("done!\n"); 570 #endif 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("bootstrap done.\n"); 574 #endif 575 576 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 577 578 /* 579 * Pages were allocated during the secondary bootstrap for the 580 * stacks for different CPU modes. 581 * We must now set the r13 registers in the different CPU modes to 582 * point to these stacks. 583 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 584 * of the stack memory. 585 */ 586 #ifdef VERBOSE_INIT_ARM 587 printf("init subsystems: stacks "); 588 #endif 589 590 set_stackptr(PSR_IRQ32_MODE, 591 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 592 set_stackptr(PSR_ABT32_MODE, 593 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 594 set_stackptr(PSR_UND32_MODE, 595 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 596 597 /* 598 * Well we should set a data abort handler. 599 * Once things get going this will change as we will need a proper 600 * handler. 601 * Until then we will use a handler that just panics but tells us 602 * why. 603 * Initialisation of the vectors will just panic on a data abort. 604 * This just fills in a slightly better one. 605 */ 606 #ifdef VERBOSE_INIT_ARM 607 printf("vectors "); 608 #endif 609 data_abort_handler_address = (u_int)data_abort_handler; 610 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 611 undefined_handler_address = (u_int)undefinedinstruction_bounce; 612 613 /* Initialise the undefined instruction handlers */ 614 #ifdef VERBOSE_INIT_ARM 615 printf("undefined "); 616 #endif 617 undefined_init(); 618 619 /* Load memory into UVM. */ 620 #ifdef VERBOSE_INIT_ARM 621 printf("page "); 622 #endif 623 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 624 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 625 atop(physical_freestart), atop(physical_freeend), 626 VM_FREELIST_DEFAULT); 627 628 /* Boot strap pmap telling it where the kernel page table is */ 629 #ifdef VERBOSE_INIT_ARM 630 printf("pmap "); 631 #endif 632 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 633 634 /* Setup the IRQ system */ 635 #ifdef VERBOSE_INIT_ARM 636 printf("irq "); 637 #endif 638 i80321_intr_init(); 639 640 #ifdef VERBOSE_INIT_ARM 641 printf("done.\n"); 642 #endif 643 644 #ifdef BOOTHOWTO 645 boothowto = BOOTHOWTO; 646 #endif 647 648 #ifdef DDB 649 db_machine_init(); 650 if (boothowto & RB_KDB) 651 Debugger(); 652 #endif 653 654 /* We return the new stack pointer address */ 655 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 656 } 657 658 /* 659 * void cpu_reboot(int howto, char *bootstr) 660 * 661 * Reboots the system 662 * 663 * Deal with any syncing, unmounting, dumping and shutdown hooks, 664 * then reset the CPU. 665 */ 666 void 667 cpu_reboot(int howto, char *bootstr) 668 { 669 670 /* 671 * If we are still cold then hit the air brakes 672 * and crash to earth fast 673 */ 674 if (cold) { 675 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 676 howto |= RB_HALT; 677 goto haltsys; 678 } 679 680 /* Disable console buffering */ 681 682 /* 683 * If RB_NOSYNC was not specified sync the discs. 684 * Note: Unless cold is set to 1 here, syslogd will die during the 685 * unmount. It looks like syslogd is getting woken up only to find 686 * that it cannot page part of the binary in as the filesystem has 687 * been unmounted. 688 */ 689 if ((howto & RB_NOSYNC) == 0) { 690 bootsync(); 691 /*resettodr();*/ 692 } 693 694 /* wait 1s */ 695 delay(1 * 1000 * 1000); 696 697 /* Say NO to interrupts */ 698 splhigh(); 699 700 /* Do a dump if requested. */ 701 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 702 dumpsys(); 703 } 704 705 haltsys: 706 /* Run any shutdown hooks */ 707 doshutdownhooks(); 708 709 pmf_system_shutdown(boothowto); 710 711 /* Make sure IRQ's are disabled */ 712 IRQdisable; 713 714 if (howto & RB_HALT) { 715 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 716 delay(3 * 1000 * 1000); /* wait 3s */ 717 718 printf("SHUTDOWN FAILED!\n"); 719 printf("The operating system has halted.\n"); 720 printf("Please press any key to reboot.\n\n"); 721 cngetc(); 722 } 723 724 printf("rebooting...\n\r"); 725 726 (void)disable_interrupts(I32_bit|F32_bit); 727 cpu_idcache_wbinv_all(); 728 cpu_drain_writebuf(); 729 730 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 731 delay(1 * 1000 * 1000); /* wait 1s */ 732 733 /* ...and if that didn't work, just croak. */ 734 printf("RESET FAILED!\n"); 735 for (;;) { 736 continue; 737 } 738 } 739 740 /* 741 * console 742 */ 743 #include "com.h" 744 #if NCOM > 0 745 #include <dev/ic/comreg.h> 746 #include <dev/ic/comvar.h> 747 #endif 748 749 /* 750 * Define the default console speed for the board. This is generally 751 * what the firmware provided with the board defaults to. 752 */ 753 #ifndef CONSPEED 754 #define CONSPEED B115200 755 #endif /* ! CONSPEED */ 756 757 #ifndef CONUNIT 758 #define CONUNIT 0 759 #endif 760 761 #ifndef CONMODE 762 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 763 #endif 764 765 int comcnspeed = CONSPEED; 766 int comcnmode = CONMODE; 767 int comcnunit = CONUNIT; 768 769 #if KGDB 770 #ifndef KGDB_DEVNAME 771 #error Must define KGDB_DEVNAME 772 #endif 773 const char kgdb_devname[] = KGDB_DEVNAME; 774 775 #ifndef KGDB_DEVADDR 776 #error Must define KGDB_DEVADDR 777 #endif 778 unsigned long kgdb_devaddr = KGDB_DEVADDR; 779 780 #ifndef KGDB_DEVRATE 781 #define KGDB_DEVRATE CONSPEED 782 #endif 783 int kgdb_devrate = KGDB_DEVRATE; 784 785 #ifndef KGDB_DEVMODE 786 #define KGDB_DEVMODE CONMODE 787 #endif 788 int kgdb_devmode = KGDB_DEVMODE; 789 #endif /* KGDB */ 790 791 void 792 consinit(void) 793 { 794 static const bus_addr_t comcnaddrs[] = { 795 HDLG_UART1, /* com0 */ 796 }; 797 static int consinit_called; 798 799 if (consinit_called) 800 return; 801 consinit_called = 1; 802 803 /* 804 * Console devices are mapped VA==PA. Our devmap reflects 805 * this, so register it now so drivers can map the console 806 * device. 807 */ 808 pmap_devmap_register(hdlg_devmap); 809 810 #if NCOM > 0 811 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 812 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 813 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 814 #else 815 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 816 #endif 817 #if KGDB 818 #if NCOM > 0 819 if (strcmp(kgdb_devname, "com") == 0) { 820 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 821 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 822 } 823 #endif /* NCOM > 0 */ 824 #endif /* KGDB */ 825 } 826