1 /* $NetBSD: hdlg_machdep.c,v 1.14 2009/12/26 16:01:24 uebayasi 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 1.14 2009/12/26 16:01:24 uebayasi 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; 154 155 /*int debug_flags;*/ 156 #ifndef PMAP_STATIC_L1S 157 int max_processes = 64; /* Default number */ 158 #endif /* !PMAP_STATIC_L1S */ 159 160 /* Physical and virtual addresses for some global pages */ 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 pv_addr_t minidataclean; 166 167 vm_offset_t msgbufphys; 168 169 extern u_int data_abort_handler_address; 170 extern u_int prefetch_abort_handler_address; 171 extern u_int undefined_handler_address; 172 173 #ifdef PMAP_DEBUG 174 extern int pmap_debug_level; 175 #endif 176 177 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 178 179 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 180 #define KERNEL_PT_KERNEL_NUM 4 181 182 /* L2 table for mapping i80321 */ 183 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 184 185 /* L2 tables for mapping kernel VM */ 186 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 187 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 188 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 189 190 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 191 192 /* Prototypes */ 193 void consinit(void); 194 195 /* Static device mappings. */ 196 static const struct pmap_devmap hdlg_devmap[] = { 197 /* 198 * Map the on-board devices VA == PA so that we can access them 199 * with the MMU on or off. 200 */ 201 { 202 HDLG_OBIO_BASE, 203 HDLG_OBIO_BASE, 204 HDLG_OBIO_SIZE, 205 VM_PROT_READ|VM_PROT_WRITE, 206 PTE_NOCACHE, 207 }, 208 209 { 210 HDLG_IOW_VBASE, 211 VERDE_OUT_XLATE_IO_WIN0_BASE, 212 VERDE_OUT_XLATE_IO_WIN_SIZE, 213 VM_PROT_READ|VM_PROT_WRITE, 214 PTE_NOCACHE, 215 }, 216 217 { 218 HDLG_80321_VBASE, 219 VERDE_PMMR_BASE, 220 VERDE_PMMR_SIZE, 221 VM_PROT_READ|VM_PROT_WRITE, 222 PTE_NOCACHE, 223 }, 224 225 { 226 0, 227 0, 228 0, 229 0, 230 0, 231 } 232 }; 233 234 static void 235 hardclock_hook(void) 236 { 237 238 /* Nothing to do */ 239 } 240 241 /* 242 * u_int initarm(...) 243 * 244 * Initial entry point on startup. This gets called before main() is 245 * entered. 246 * It should be responsible for setting up everything that must be 247 * in place when main is called. 248 * This includes 249 * Taking a copy of the boot configuration structure. 250 * Initialising the physical console so characters can be printed. 251 * Setting up page tables for the kernel 252 * Relocating the kernel to the bottom of physical memory 253 */ 254 u_int 255 initarm(void *arg) 256 { 257 extern vaddr_t xscale_cache_clean_addr; 258 #ifdef DIAGNOSTIC 259 extern vsize_t xscale_minidata_clean_size; 260 #endif 261 int loop; 262 int loop1; 263 u_int l1pagetable; 264 paddr_t memstart; 265 psize_t memsize; 266 267 /* Calibrate the delay loop. */ 268 i80321_calibrate_delay(); 269 i80321_hardclock_hook = hardclock_hook; 270 271 /* 272 * Since we map the on-board devices VA==PA, and the kernel 273 * is running VA==PA, it's possible for us to initialize 274 * the console now. 275 */ 276 consinit(); 277 278 #ifdef VERBOSE_INIT_ARM 279 /* Talk to the user */ 280 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 281 #endif 282 283 /* 284 * Heads up ... Setup the CPU / MMU / TLB functions 285 */ 286 if (set_cpufuncs()) 287 panic("CPU not recognized!"); 288 289 /* 290 * We are currently running with the MMU enabled and the 291 * entire address space mapped VA==PA, except for the 292 * first 64M of RAM is also double-mapped at 0xc0000000. 293 * There is an L1 page table at 0xa0004000. 294 */ 295 296 /* 297 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 298 * registers. 299 */ 300 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 301 &memstart, &memsize); 302 303 #ifdef VERBOSE_INIT_ARM 304 printf("initarm: Configuring system ...\n"); 305 #endif 306 307 /* Fake bootconfig structure for the benefit of pmap.c */ 308 /* XXX must make the memory description h/w independent */ 309 bootconfig.dramblocks = 1; 310 bootconfig.dram[0].address = memstart; 311 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 312 313 /* 314 * Set up the variables that define the availablilty of 315 * physical memory. For now, we're going to set 316 * physical_freestart to 0xa0200000 (where the kernel 317 * was loaded), and allocate the memory we need downwards. 318 * If we get too close to the L1 table that we set up, we 319 * will panic. We will update physical_freestart and 320 * physical_freeend later to reflect what pmap_bootstrap() 321 * wants to see. 322 * 323 * XXX pmap_bootstrap() needs an enema. 324 */ 325 physical_start = bootconfig.dram[0].address; 326 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 327 328 physical_freestart = 0xa0009000UL; 329 physical_freeend = 0xa0200000UL; 330 331 physmem = (physical_end - physical_start) / PAGE_SIZE; 332 333 #ifdef VERBOSE_INIT_ARM 334 /* Tell the user about the memory */ 335 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 336 physical_start, physical_end - 1); 337 #endif 338 339 /* 340 * Okay, the kernel starts 2MB in from the bottom of physical 341 * memory. We are going to allocate our bootstrap pages downwards 342 * from there. 343 * 344 * We need to allocate some fixed page tables to get the kernel 345 * going. We allocate one page directory and a number of page 346 * tables and store the physical addresses in the kernel_pt_table 347 * array. 348 * 349 * The kernel page directory must be on a 16K boundary. The page 350 * tables must be on 4K boundaries. What we do is allocate the 351 * page directory on the first 16K boundary that we encounter, and 352 * the page tables on 4K boundaries otherwise. Since we allocate 353 * at least 3 L2 page tables, we are guaranteed to encounter at 354 * least one 16K aligned region. 355 */ 356 357 #ifdef VERBOSE_INIT_ARM 358 printf("Allocating page tables\n"); 359 #endif 360 361 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 362 363 #ifdef VERBOSE_INIT_ARM 364 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 365 physical_freestart, free_pages, free_pages); 366 #endif 367 368 /* Define a macro to simplify memory allocation */ 369 #define valloc_pages(var, np) \ 370 alloc_pages((var).pv_pa, (np)); \ 371 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 372 373 #define alloc_pages(var, np) \ 374 physical_freeend -= ((np) * PAGE_SIZE); \ 375 if (physical_freeend < physical_freestart) \ 376 panic("initarm: out of memory"); \ 377 (var) = physical_freeend; \ 378 free_pages -= (np); \ 379 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 380 381 loop1 = 0; 382 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 383 /* Are we 16KB aligned for an L1 ? */ 384 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 385 && kernel_l1pt.pv_pa == 0) { 386 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 387 } else { 388 valloc_pages(kernel_pt_table[loop1], 389 L2_TABLE_SIZE / PAGE_SIZE); 390 ++loop1; 391 } 392 } 393 394 /* This should never be able to happen but better confirm that. */ 395 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 396 panic("initarm: Failed to align the kernel page directory"); 397 398 /* 399 * Allocate a page for the system page mapped to V0x00000000 400 * This page will just contain the system vectors and can be 401 * shared by all processes. 402 */ 403 alloc_pages(systempage.pv_pa, 1); 404 405 /* Allocate stacks for all modes */ 406 valloc_pages(irqstack, IRQ_STACK_SIZE); 407 valloc_pages(abtstack, ABT_STACK_SIZE); 408 valloc_pages(undstack, UND_STACK_SIZE); 409 valloc_pages(kernelstack, UPAGES); 410 411 /* Allocate enough pages for cleaning the Mini-Data cache. */ 412 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 413 valloc_pages(minidataclean, 1); 414 415 #ifdef VERBOSE_INIT_ARM 416 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 417 irqstack.pv_va); 418 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 419 abtstack.pv_va); 420 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 421 undstack.pv_va); 422 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 423 kernelstack.pv_va); 424 #endif 425 426 /* 427 * XXX Defer this to later so that we can reclaim the memory 428 * XXX used by the RedBoot page tables. 429 */ 430 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 431 432 /* 433 * Ok we have allocated physical pages for the primary kernel 434 * page tables 435 */ 436 437 #ifdef VERBOSE_INIT_ARM 438 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 439 #endif 440 441 /* 442 * Now we start construction of the L1 page table 443 * We start by mapping the L2 page tables into the L1. 444 * This means that we can replace L1 mappings later on if necessary 445 */ 446 l1pagetable = kernel_l1pt.pv_pa; 447 448 /* Map the L2 pages tables in the L1 page table */ 449 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 450 &kernel_pt_table[KERNEL_PT_SYS]); 451 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 452 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 453 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 454 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 455 &kernel_pt_table[KERNEL_PT_IOPXS]); 456 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 457 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 458 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 459 460 /* update the top of the kernel VM */ 461 pmap_curmaxkvaddr = 462 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 463 464 #ifdef VERBOSE_INIT_ARM 465 printf("Mapping kernel\n"); 466 #endif 467 468 /* Now we fill in the L2 pagetable for the kernel static code/data */ 469 { 470 extern char etext[], _end[]; 471 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 472 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 473 u_int logical; 474 475 textsize = (textsize + PGOFSET) & ~PGOFSET; 476 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 477 478 logical = 0x00200000; /* offset of kernel in RAM */ 479 480 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 481 physical_start + logical, textsize, 482 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 483 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 484 physical_start + logical, totalsize - textsize, 485 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 486 } 487 488 #ifdef VERBOSE_INIT_ARM 489 printf("Constructing L2 page tables\n"); 490 #endif 491 492 /* Map the stack pages */ 493 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 494 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 495 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 496 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 497 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 498 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 499 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 500 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 501 502 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 503 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 504 505 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 506 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 507 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 508 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 509 } 510 511 /* Map the Mini-Data cache clean area. */ 512 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 513 minidataclean.pv_pa); 514 515 /* Map the vector page. */ 516 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 517 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 518 519 /* Map the statically mapped devices. */ 520 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 521 522 /* 523 * Give the XScale global cache clean code an appropriately 524 * sized chunk of unmapped VA space starting at 0xff000000 525 * (our device mappings end before this address). 526 */ 527 xscale_cache_clean_addr = 0xff000000U; 528 529 /* 530 * Now we have the real page tables in place so we can switch to them. 531 * Once this is done we will be running with the REAL kernel page 532 * tables. 533 */ 534 535 /* 536 * Update the physical_freestart/physical_freeend/free_pages 537 * variables. 538 */ 539 { 540 extern char _end[]; 541 542 physical_freestart = physical_start + 543 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 544 KERNEL_BASE); 545 physical_freeend = physical_end; 546 free_pages = 547 (physical_freeend - physical_freestart) / PAGE_SIZE; 548 } 549 550 /* Switch tables */ 551 #ifdef VERBOSE_INIT_ARM 552 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 553 physical_freestart, free_pages, free_pages); 554 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 555 #endif 556 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 557 cpu_setttb(kernel_l1pt.pv_pa); 558 cpu_tlb_flushID(); 559 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 560 561 /* 562 * Moved from cpu_startup() as data_abort_handler() references 563 * this during uvm init 564 */ 565 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("done!\n"); 569 #endif 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("bootstrap done.\n"); 573 #endif 574 575 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 576 577 /* 578 * Pages were allocated during the secondary bootstrap for the 579 * stacks for different CPU modes. 580 * We must now set the r13 registers in the different CPU modes to 581 * point to these stacks. 582 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 583 * of the stack memory. 584 */ 585 #ifdef VERBOSE_INIT_ARM 586 printf("init subsystems: stacks "); 587 #endif 588 589 set_stackptr(PSR_IRQ32_MODE, 590 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 591 set_stackptr(PSR_ABT32_MODE, 592 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 593 set_stackptr(PSR_UND32_MODE, 594 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 595 596 /* 597 * Well we should set a data abort handler. 598 * Once things get going this will change as we will need a proper 599 * handler. 600 * Until then we will use a handler that just panics but tells us 601 * why. 602 * Initialisation of the vectors will just panic on a data abort. 603 * This just fills in a slightly better one. 604 */ 605 #ifdef VERBOSE_INIT_ARM 606 printf("vectors "); 607 #endif 608 data_abort_handler_address = (u_int)data_abort_handler; 609 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 610 undefined_handler_address = (u_int)undefinedinstruction_bounce; 611 612 /* Initialise the undefined instruction handlers */ 613 #ifdef VERBOSE_INIT_ARM 614 printf("undefined "); 615 #endif 616 undefined_init(); 617 618 /* Load memory into UVM. */ 619 #ifdef VERBOSE_INIT_ARM 620 printf("page "); 621 #endif 622 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 623 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 624 atop(physical_freestart), atop(physical_freeend), 625 VM_FREELIST_DEFAULT); 626 627 /* Boot strap pmap telling it where the kernel page table is */ 628 #ifdef VERBOSE_INIT_ARM 629 printf("pmap "); 630 #endif 631 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 632 633 /* Setup the IRQ system */ 634 #ifdef VERBOSE_INIT_ARM 635 printf("irq "); 636 #endif 637 i80321_intr_init(); 638 639 #ifdef VERBOSE_INIT_ARM 640 printf("done.\n"); 641 #endif 642 643 #ifdef BOOTHOWTO 644 boothowto = BOOTHOWTO; 645 #endif 646 647 #ifdef DDB 648 db_machine_init(); 649 if (boothowto & RB_KDB) 650 Debugger(); 651 #endif 652 653 /* We return the new stack pointer address */ 654 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 655 } 656 657 /* 658 * void cpu_reboot(int howto, char *bootstr) 659 * 660 * Reboots the system 661 * 662 * Deal with any syncing, unmounting, dumping and shutdown hooks, 663 * then reset the CPU. 664 */ 665 void 666 cpu_reboot(int howto, char *bootstr) 667 { 668 669 /* 670 * If we are still cold then hit the air brakes 671 * and crash to earth fast 672 */ 673 if (cold) { 674 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 675 howto |= RB_HALT; 676 goto haltsys; 677 } 678 679 /* Disable console buffering */ 680 681 /* 682 * If RB_NOSYNC was not specified sync the discs. 683 * Note: Unless cold is set to 1 here, syslogd will die during the 684 * unmount. It looks like syslogd is getting woken up only to find 685 * that it cannot page part of the binary in as the filesystem has 686 * been unmounted. 687 */ 688 if ((howto & RB_NOSYNC) == 0) { 689 bootsync(); 690 /*resettodr();*/ 691 } 692 693 /* wait 1s */ 694 delay(1 * 1000 * 1000); 695 696 /* Say NO to interrupts */ 697 splhigh(); 698 699 /* Do a dump if requested. */ 700 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 701 dumpsys(); 702 } 703 704 haltsys: 705 /* Run any shutdown hooks */ 706 doshutdownhooks(); 707 708 pmf_system_shutdown(boothowto); 709 710 /* Make sure IRQ's are disabled */ 711 IRQdisable; 712 713 if (howto & RB_HALT) { 714 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 715 delay(3 * 1000 * 1000); /* wait 3s */ 716 717 printf("SHUTDOWN FAILED!\n"); 718 printf("The operating system has halted.\n"); 719 printf("Please press any key to reboot.\n\n"); 720 cngetc(); 721 } 722 723 printf("rebooting...\n\r"); 724 725 (void)disable_interrupts(I32_bit|F32_bit); 726 cpu_idcache_wbinv_all(); 727 cpu_drain_writebuf(); 728 729 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 730 delay(1 * 1000 * 1000); /* wait 1s */ 731 732 /* ...and if that didn't work, just croak. */ 733 printf("RESET FAILED!\n"); 734 for (;;) { 735 continue; 736 } 737 } 738 739 /* 740 * console 741 */ 742 #include "com.h" 743 #if NCOM > 0 744 #include <dev/ic/comreg.h> 745 #include <dev/ic/comvar.h> 746 #endif 747 748 /* 749 * Define the default console speed for the board. This is generally 750 * what the firmware provided with the board defaults to. 751 */ 752 #ifndef CONSPEED 753 #define CONSPEED B115200 754 #endif /* ! CONSPEED */ 755 756 #ifndef CONUNIT 757 #define CONUNIT 0 758 #endif 759 760 #ifndef CONMODE 761 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 762 #endif 763 764 int comcnspeed = CONSPEED; 765 int comcnmode = CONMODE; 766 int comcnunit = CONUNIT; 767 768 #if KGDB 769 #ifndef KGDB_DEVNAME 770 #error Must define KGDB_DEVNAME 771 #endif 772 const char kgdb_devname[] = KGDB_DEVNAME; 773 774 #ifndef KGDB_DEVADDR 775 #error Must define KGDB_DEVADDR 776 #endif 777 unsigned long kgdb_devaddr = KGDB_DEVADDR; 778 779 #ifndef KGDB_DEVRATE 780 #define KGDB_DEVRATE CONSPEED 781 #endif 782 int kgdb_devrate = KGDB_DEVRATE; 783 784 #ifndef KGDB_DEVMODE 785 #define KGDB_DEVMODE CONMODE 786 #endif 787 int kgdb_devmode = KGDB_DEVMODE; 788 #endif /* KGDB */ 789 790 void 791 consinit(void) 792 { 793 static const bus_addr_t comcnaddrs[] = { 794 HDLG_UART1, /* com0 */ 795 }; 796 static int consinit_called; 797 798 if (consinit_called) 799 return; 800 consinit_called = 1; 801 802 /* 803 * Console devices are mapped VA==PA. Our devmap reflects 804 * this, so register it now so drivers can map the console 805 * device. 806 */ 807 pmap_devmap_register(hdlg_devmap); 808 809 #if NCOM > 0 810 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 811 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 812 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 813 #else 814 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 815 #endif 816 #if KGDB 817 #if NCOM > 0 818 if (strcmp(kgdb_devname, "com") == 0) { 819 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 820 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 821 } 822 #endif /* NCOM > 0 */ 823 #endif /* KGDB */ 824 } 825