1 /* $NetBSD: hdlg_machdep.c,v 1.9 2008/11/30 18:21:33 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 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 1.9 2008/11/30 18:21:33 martin 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 irqstack; 164 pv_addr_t undstack; 165 pv_addr_t abtstack; 166 pv_addr_t kernelstack; 167 pv_addr_t minidataclean; 168 169 vm_offset_t msgbufphys; 170 171 extern u_int data_abort_handler_address; 172 extern u_int prefetch_abort_handler_address; 173 extern u_int undefined_handler_address; 174 175 #ifdef PMAP_DEBUG 176 extern int pmap_debug_level; 177 #endif 178 179 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 180 181 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 182 #define KERNEL_PT_KERNEL_NUM 4 183 184 /* L2 table for mapping i80321 */ 185 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 186 187 /* L2 tables for mapping kernel VM */ 188 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 189 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 190 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 191 192 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 193 194 struct user *proc0paddr; 195 196 /* Prototypes */ 197 void consinit(void); 198 199 /* Static device mappings. */ 200 static const struct pmap_devmap hdlg_devmap[] = { 201 /* 202 * Map the on-board devices VA == PA so that we can access them 203 * with the MMU on or off. 204 */ 205 { 206 HDLG_OBIO_BASE, 207 HDLG_OBIO_BASE, 208 HDLG_OBIO_SIZE, 209 VM_PROT_READ|VM_PROT_WRITE, 210 PTE_NOCACHE, 211 }, 212 213 { 214 HDLG_IOW_VBASE, 215 VERDE_OUT_XLATE_IO_WIN0_BASE, 216 VERDE_OUT_XLATE_IO_WIN_SIZE, 217 VM_PROT_READ|VM_PROT_WRITE, 218 PTE_NOCACHE, 219 }, 220 221 { 222 HDLG_80321_VBASE, 223 VERDE_PMMR_BASE, 224 VERDE_PMMR_SIZE, 225 VM_PROT_READ|VM_PROT_WRITE, 226 PTE_NOCACHE, 227 }, 228 229 { 230 0, 231 0, 232 0, 233 0, 234 0, 235 } 236 }; 237 238 static void 239 hardclock_hook(void) 240 { 241 242 /* Nothing to do */ 243 } 244 245 /* 246 * u_int initarm(...) 247 * 248 * Initial entry point on startup. This gets called before main() is 249 * entered. 250 * It should be responsible for setting up everything that must be 251 * in place when main is called. 252 * This includes 253 * Taking a copy of the boot configuration structure. 254 * Initialising the physical console so characters can be printed. 255 * Setting up page tables for the kernel 256 * Relocating the kernel to the bottom of physical memory 257 */ 258 u_int 259 initarm(void *arg) 260 { 261 extern vaddr_t xscale_cache_clean_addr; 262 #ifdef DIAGNOSTIC 263 extern vsize_t xscale_minidata_clean_size; 264 #endif 265 int loop; 266 int loop1; 267 u_int l1pagetable; 268 paddr_t memstart; 269 psize_t memsize; 270 271 /* Calibrate the delay loop. */ 272 i80321_calibrate_delay(); 273 i80321_hardclock_hook = hardclock_hook; 274 275 /* 276 * Since we map the on-board devices VA==PA, and the kernel 277 * is running VA==PA, it's possible for us to initialize 278 * the console now. 279 */ 280 consinit(); 281 282 #ifdef VERBOSE_INIT_ARM 283 /* Talk to the user */ 284 printf("\nNetBSD/evbarm (HDL-G) booting ...\n"); 285 #endif 286 287 /* 288 * Heads up ... Setup the CPU / MMU / TLB functions 289 */ 290 if (set_cpufuncs()) 291 panic("CPU not recognized!"); 292 293 /* 294 * We are currently running with the MMU enabled and the 295 * entire address space mapped VA==PA, except for the 296 * first 64M of RAM is also double-mapped at 0xc0000000. 297 * There is an L1 page table at 0xa0004000. 298 */ 299 300 /* 301 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 302 * registers. 303 */ 304 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 305 &memstart, &memsize); 306 307 #ifdef VERBOSE_INIT_ARM 308 printf("initarm: Configuring system ...\n"); 309 #endif 310 311 /* Fake bootconfig structure for the benefit of pmap.c */ 312 /* XXX must make the memory description h/w independent */ 313 bootconfig.dramblocks = 1; 314 bootconfig.dram[0].address = memstart; 315 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 316 317 /* 318 * Set up the variables that define the availablilty of 319 * physical memory. For now, we're going to set 320 * physical_freestart to 0xa0200000 (where the kernel 321 * was loaded), and allocate the memory we need downwards. 322 * If we get too close to the L1 table that we set up, we 323 * will panic. We will update physical_freestart and 324 * physical_freeend later to reflect what pmap_bootstrap() 325 * wants to see. 326 * 327 * XXX pmap_bootstrap() needs an enema. 328 */ 329 physical_start = bootconfig.dram[0].address; 330 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 331 332 physical_freestart = 0xa0009000UL; 333 physical_freeend = 0xa0200000UL; 334 335 physmem = (physical_end - physical_start) / PAGE_SIZE; 336 337 #ifdef VERBOSE_INIT_ARM 338 /* Tell the user about the memory */ 339 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 340 physical_start, physical_end - 1); 341 #endif 342 343 /* 344 * Okay, the kernel starts 2MB in from the bottom of physical 345 * memory. We are going to allocate our bootstrap pages downwards 346 * from there. 347 * 348 * We need to allocate some fixed page tables to get the kernel 349 * going. We allocate one page directory and a number of page 350 * tables and store the physical addresses in the kernel_pt_table 351 * array. 352 * 353 * The kernel page directory must be on a 16K boundary. The page 354 * tables must be on 4K boundaries. What we do is allocate the 355 * page directory on the first 16K boundary that we encounter, and 356 * the page tables on 4K boundaries otherwise. Since we allocate 357 * at least 3 L2 page tables, we are guaranteed to encounter at 358 * least one 16K aligned region. 359 */ 360 361 #ifdef VERBOSE_INIT_ARM 362 printf("Allocating page tables\n"); 363 #endif 364 365 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 366 367 #ifdef VERBOSE_INIT_ARM 368 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 369 physical_freestart, free_pages, free_pages); 370 #endif 371 372 /* Define a macro to simplify memory allocation */ 373 #define valloc_pages(var, np) \ 374 alloc_pages((var).pv_pa, (np)); \ 375 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 376 377 #define alloc_pages(var, np) \ 378 physical_freeend -= ((np) * PAGE_SIZE); \ 379 if (physical_freeend < physical_freestart) \ 380 panic("initarm: out of memory"); \ 381 (var) = physical_freeend; \ 382 free_pages -= (np); \ 383 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 384 385 loop1 = 0; 386 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 387 /* Are we 16KB aligned for an L1 ? */ 388 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 389 && kernel_l1pt.pv_pa == 0) { 390 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 391 } else { 392 valloc_pages(kernel_pt_table[loop1], 393 L2_TABLE_SIZE / PAGE_SIZE); 394 ++loop1; 395 } 396 } 397 398 /* This should never be able to happen but better confirm that. */ 399 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 400 panic("initarm: Failed to align the kernel page directory"); 401 402 /* 403 * Allocate a page for the system page mapped to V0x00000000 404 * This page will just contain the system vectors and can be 405 * shared by all processes. 406 */ 407 alloc_pages(systempage.pv_pa, 1); 408 409 /* Allocate stacks for all modes */ 410 valloc_pages(irqstack, IRQ_STACK_SIZE); 411 valloc_pages(abtstack, ABT_STACK_SIZE); 412 valloc_pages(undstack, UND_STACK_SIZE); 413 valloc_pages(kernelstack, UPAGES); 414 415 /* Allocate enough pages for cleaning the Mini-Data cache. */ 416 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 417 valloc_pages(minidataclean, 1); 418 419 #ifdef VERBOSE_INIT_ARM 420 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 421 irqstack.pv_va); 422 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 423 abtstack.pv_va); 424 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 425 undstack.pv_va); 426 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 427 kernelstack.pv_va); 428 #endif 429 430 /* 431 * XXX Defer this to later so that we can reclaim the memory 432 * XXX used by the RedBoot page tables. 433 */ 434 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 435 436 /* 437 * Ok we have allocated physical pages for the primary kernel 438 * page tables 439 */ 440 441 #ifdef VERBOSE_INIT_ARM 442 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 443 #endif 444 445 /* 446 * Now we start construction of the L1 page table 447 * We start by mapping the L2 page tables into the L1. 448 * This means that we can replace L1 mappings later on if necessary 449 */ 450 l1pagetable = kernel_l1pt.pv_pa; 451 452 /* Map the L2 pages tables in the L1 page table */ 453 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 454 &kernel_pt_table[KERNEL_PT_SYS]); 455 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 456 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 457 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 458 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE, 459 &kernel_pt_table[KERNEL_PT_IOPXS]); 460 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 461 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 462 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 463 464 /* update the top of the kernel VM */ 465 pmap_curmaxkvaddr = 466 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("Mapping kernel\n"); 470 #endif 471 472 /* Now we fill in the L2 pagetable for the kernel static code/data */ 473 { 474 extern char etext[], _end[]; 475 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 476 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 477 u_int logical; 478 479 textsize = (textsize + PGOFSET) & ~PGOFSET; 480 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 481 482 logical = 0x00200000; /* offset of kernel in RAM */ 483 484 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 485 physical_start + logical, textsize, 486 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 487 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 488 physical_start + logical, totalsize - textsize, 489 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 490 } 491 492 #ifdef VERBOSE_INIT_ARM 493 printf("Constructing L2 page tables\n"); 494 #endif 495 496 /* Map the stack pages */ 497 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 498 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 499 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 500 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 501 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 502 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 503 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 504 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 505 506 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 507 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 508 509 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 510 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 511 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 512 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 513 } 514 515 /* Map the Mini-Data cache clean area. */ 516 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 517 minidataclean.pv_pa); 518 519 /* Map the vector page. */ 520 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 521 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 522 523 /* Map the statically mapped devices. */ 524 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap); 525 526 /* 527 * Give the XScale global cache clean code an appropriately 528 * sized chunk of unmapped VA space starting at 0xff000000 529 * (our device mappings end before this address). 530 */ 531 xscale_cache_clean_addr = 0xff000000U; 532 533 /* 534 * Now we have the real page tables in place so we can switch to them. 535 * Once this is done we will be running with the REAL kernel page 536 * tables. 537 */ 538 539 /* 540 * Update the physical_freestart/physical_freeend/free_pages 541 * variables. 542 */ 543 { 544 extern char _end[]; 545 546 physical_freestart = physical_start + 547 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 548 KERNEL_BASE); 549 physical_freeend = physical_end; 550 free_pages = 551 (physical_freeend - physical_freestart) / PAGE_SIZE; 552 } 553 554 /* Switch tables */ 555 #ifdef VERBOSE_INIT_ARM 556 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 557 physical_freestart, free_pages, free_pages); 558 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 559 #endif 560 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 561 setttb(kernel_l1pt.pv_pa); 562 cpu_tlb_flushID(); 563 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 564 565 /* 566 * Moved from cpu_startup() as data_abort_handler() references 567 * this during uvm init 568 */ 569 proc0paddr = (struct user *)kernelstack.pv_va; 570 lwp0.l_addr = proc0paddr; 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("done!\n"); 574 #endif 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("bootstrap done.\n"); 578 #endif 579 580 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 581 582 /* 583 * Pages were allocated during the secondary bootstrap for the 584 * stacks for different CPU modes. 585 * We must now set the r13 registers in the different CPU modes to 586 * point to these stacks. 587 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 588 * of the stack memory. 589 */ 590 #ifdef VERBOSE_INIT_ARM 591 printf("init subsystems: stacks "); 592 #endif 593 594 set_stackptr(PSR_IRQ32_MODE, 595 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 596 set_stackptr(PSR_ABT32_MODE, 597 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 598 set_stackptr(PSR_UND32_MODE, 599 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 600 601 /* 602 * Well we should set a data abort handler. 603 * Once things get going this will change as we will need a proper 604 * handler. 605 * Until then we will use a handler that just panics but tells us 606 * why. 607 * Initialisation of the vectors will just panic on a data abort. 608 * This just fills in a slightly better one. 609 */ 610 #ifdef VERBOSE_INIT_ARM 611 printf("vectors "); 612 #endif 613 data_abort_handler_address = (u_int)data_abort_handler; 614 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 615 undefined_handler_address = (u_int)undefinedinstruction_bounce; 616 617 /* Initialise the undefined instruction handlers */ 618 #ifdef VERBOSE_INIT_ARM 619 printf("undefined "); 620 #endif 621 undefined_init(); 622 623 /* Load memory into UVM. */ 624 #ifdef VERBOSE_INIT_ARM 625 printf("page "); 626 #endif 627 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 628 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 629 atop(physical_freestart), atop(physical_freeend), 630 VM_FREELIST_DEFAULT); 631 632 /* Boot strap pmap telling it where the kernel page table is */ 633 #ifdef VERBOSE_INIT_ARM 634 printf("pmap "); 635 #endif 636 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 637 638 /* Setup the IRQ system */ 639 #ifdef VERBOSE_INIT_ARM 640 printf("irq "); 641 #endif 642 i80321_intr_init(); 643 644 #ifdef VERBOSE_INIT_ARM 645 printf("done.\n"); 646 #endif 647 648 #ifdef BOOTHOWTO 649 boothowto = BOOTHOWTO; 650 #endif 651 652 #ifdef DDB 653 db_machine_init(); 654 if (boothowto & RB_KDB) 655 Debugger(); 656 #endif 657 658 /* We return the new stack pointer address */ 659 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 660 } 661 662 /* 663 * void cpu_reboot(int howto, char *bootstr) 664 * 665 * Reboots the system 666 * 667 * Deal with any syncing, unmounting, dumping and shutdown hooks, 668 * then reset the CPU. 669 */ 670 void 671 cpu_reboot(int howto, char *bootstr) 672 { 673 674 /* 675 * If we are still cold then hit the air brakes 676 * and crash to earth fast 677 */ 678 if (cold) { 679 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED; 680 howto |= RB_HALT; 681 goto haltsys; 682 } 683 684 /* Disable console buffering */ 685 686 /* 687 * If RB_NOSYNC was not specified sync the discs. 688 * Note: Unless cold is set to 1 here, syslogd will die during the 689 * unmount. It looks like syslogd is getting woken up only to find 690 * that it cannot page part of the binary in as the filesystem has 691 * been unmounted. 692 */ 693 if ((howto & RB_NOSYNC) == 0) { 694 bootsync(); 695 /*resettodr();*/ 696 } 697 698 /* wait 1s */ 699 delay(1 * 1000 * 1000); 700 701 /* Say NO to interrupts */ 702 splhigh(); 703 704 /* Do a dump if requested. */ 705 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) { 706 dumpsys(); 707 } 708 709 haltsys: 710 /* Run any shutdown hooks */ 711 doshutdownhooks(); 712 713 pmf_system_shutdown(boothowto); 714 715 /* Make sure IRQ's are disabled */ 716 IRQdisable; 717 718 if (howto & RB_HALT) { 719 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF; 720 delay(3 * 1000 * 1000); /* wait 3s */ 721 722 printf("SHUTDOWN FAILED!\n"); 723 printf("The operating system has halted.\n"); 724 printf("Please press any key to reboot.\n\n"); 725 cngetc(); 726 } 727 728 printf("rebooting...\n\r"); 729 730 (void)disable_interrupts(I32_bit|F32_bit); 731 cpu_idcache_wbinv_all(); 732 cpu_drain_writebuf(); 733 734 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET; 735 delay(1 * 1000 * 1000); /* wait 1s */ 736 737 /* ...and if that didn't work, just croak. */ 738 printf("RESET FAILED!\n"); 739 for (;;) { 740 continue; 741 } 742 } 743 744 /* 745 * console 746 */ 747 #include "com.h" 748 #if NCOM > 0 749 #include <dev/ic/comreg.h> 750 #include <dev/ic/comvar.h> 751 #endif 752 753 /* 754 * Define the default console speed for the board. This is generally 755 * what the firmware provided with the board defaults to. 756 */ 757 #ifndef CONSPEED 758 #define CONSPEED B115200 759 #endif /* ! CONSPEED */ 760 761 #ifndef CONUNIT 762 #define CONUNIT 0 763 #endif 764 765 #ifndef CONMODE 766 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 767 #endif 768 769 int comcnspeed = CONSPEED; 770 int comcnmode = CONMODE; 771 int comcnunit = CONUNIT; 772 773 #if KGDB 774 #ifndef KGDB_DEVNAME 775 #error Must define KGDB_DEVNAME 776 #endif 777 const char kgdb_devname[] = KGDB_DEVNAME; 778 779 #ifndef KGDB_DEVADDR 780 #error Must define KGDB_DEVADDR 781 #endif 782 unsigned long kgdb_devaddr = KGDB_DEVADDR; 783 784 #ifndef KGDB_DEVRATE 785 #define KGDB_DEVRATE CONSPEED 786 #endif 787 int kgdb_devrate = KGDB_DEVRATE; 788 789 #ifndef KGDB_DEVMODE 790 #define KGDB_DEVMODE CONMODE 791 #endif 792 int kgdb_devmode = KGDB_DEVMODE; 793 #endif /* KGDB */ 794 795 void 796 consinit(void) 797 { 798 static const bus_addr_t comcnaddrs[] = { 799 HDLG_UART1, /* com0 */ 800 }; 801 static int consinit_called; 802 803 if (consinit_called) 804 return; 805 consinit_called = 1; 806 807 /* 808 * Console devices are mapped VA==PA. Our devmap reflects 809 * this, so register it now so drivers can map the console 810 * device. 811 */ 812 pmap_devmap_register(hdlg_devmap); 813 814 #if NCOM > 0 815 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 816 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 817 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 818 #else 819 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 820 #endif 821 #if KGDB 822 #if NCOM > 0 823 if (strcmp(kgdb_devname, "com") == 0) { 824 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 825 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 826 } 827 #endif /* NCOM > 0 */ 828 #endif /* KGDB */ 829 } 830