1 /* $NetBSD: smdk2800_machdep.c,v 1.26 2008/04/27 18:58:47 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Fujitsu Component Limited 5 * Copyright (c) 2002, 2003, 2005 Genetec Corporation 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 * Genetec corporation may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 2001,2002 ARM Ltd 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. The name of the company may not be used to endorse or promote 48 * products derived from this software without specific prior written 49 * permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 53 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 54 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 55 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 56 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 57 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 58 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 59 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 60 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 61 * POSSIBILITY OF SUCH DAMAGE. 62 * 63 */ 64 65 /* 66 * Copyright (c) 1997,1998 Mark Brinicombe. 67 * Copyright (c) 1997,1998 Causality Limited. 68 * All rights reserved. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. All advertising materials mentioning features or use of this software 79 * must display the following acknowledgement: 80 * This product includes software developed by Mark Brinicombe 81 * for the NetBSD Project. 82 * 4. The name of the company nor the name of the author may be used to 83 * endorse or promote products derived from this software without specific 84 * prior written permission. 85 * 86 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 87 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 88 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 89 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 90 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 91 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 93 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 94 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 95 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 96 * SUCH DAMAGE. 97 * 98 * Machine dependant functions for kernel setup for integrator board 99 * 100 * Created : 24/11/97 101 */ 102 103 /* 104 * Machine dependant functions for kernel setup for Samsung SMDK2800 105 * derived from integrator_machdep.c 106 */ 107 108 #include <sys/cdefs.h> 109 __KERNEL_RCSID(0, "$NetBSD: smdk2800_machdep.c,v 1.26 2008/04/27 18:58:47 matt Exp $"); 110 111 #include "opt_ddb.h" 112 #include "opt_kgdb.h" 113 #include "opt_pmap_debug.h" 114 #include "opt_md.h" 115 #include "pci.h" 116 117 #include <sys/param.h> 118 #include <sys/device.h> 119 #include <sys/systm.h> 120 #include <sys/kernel.h> 121 #include <sys/exec.h> 122 #include <sys/proc.h> 123 #include <sys/msgbuf.h> 124 #include <sys/reboot.h> 125 #include <sys/termios.h> 126 #include <sys/ksyms.h> 127 128 #include <uvm/uvm_extern.h> 129 130 #include <dev/cons.h> 131 #include <dev/md.h> 132 133 #include <machine/db_machdep.h> 134 #include <ddb/db_sym.h> 135 #include <ddb/db_extern.h> 136 #ifdef KGDB 137 #include <sys/kgdb.h> 138 #endif 139 140 #include <machine/bootconfig.h> 141 #include <machine/bus.h> 142 #include <machine/cpu.h> 143 #include <machine/frame.h> 144 #include <machine/intr.h> 145 #include <arm/undefined.h> 146 147 #include <arm/arm32/machdep.h> 148 149 #include <arm/s3c2xx0/s3c2800reg.h> 150 #include <arm/s3c2xx0/s3c2800var.h> 151 #include <evbarm/smdk2xx0/smdk2800var.h> 152 153 #include "ksyms.h" 154 155 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 156 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 157 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 158 159 /* 160 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 161 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 162 */ 163 #define KERNEL_VM_SIZE 0x0C000000 164 165 /* Memory disk support */ 166 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 167 #define DO_MEMORY_DISK 168 /* We have memory disk image outside of the kernel on ROM. */ 169 #ifdef MEMORY_DISK_ROOT_ROM 170 /* map the image directory and use read-only */ 171 #else 172 /* copy the image to RAM */ 173 #endif 174 #endif 175 176 177 /* 178 * Address to call from cpu_reset() to reset the machine. 179 * This is machine architecture dependant as it varies depending 180 * on where the ROM appears when you turn the MMU off. 181 */ 182 u_int cpu_reset_address = (u_int)0; 183 184 /* Define various stack sizes in pages */ 185 #define IRQ_STACK_SIZE 1 186 #define ABT_STACK_SIZE 1 187 #define UND_STACK_SIZE 1 188 189 BootConfig bootconfig; /* Boot config storage */ 190 char *boot_args = NULL; 191 char *boot_file = NULL; 192 193 vm_offset_t physical_start; 194 vm_offset_t physical_freestart; 195 vm_offset_t physical_freeend; 196 vm_offset_t physical_end; 197 u_int free_pages; 198 vm_offset_t pagetables_start; 199 int physmem = 0; 200 201 /*int debug_flags;*/ 202 #ifndef PMAP_STATIC_L1S 203 int max_processes = 64; /* Default number */ 204 #endif /* !PMAP_STATIC_L1S */ 205 206 /* Physical and virtual addresses for some global pages */ 207 pv_addr_t irqstack; 208 pv_addr_t undstack; 209 pv_addr_t abtstack; 210 pv_addr_t kernelstack; 211 212 vm_offset_t msgbufphys; 213 214 extern u_int data_abort_handler_address; 215 extern u_int prefetch_abort_handler_address; 216 extern u_int undefined_handler_address; 217 218 #ifdef PMAP_DEBUG 219 extern int pmap_debug_level; 220 #endif 221 222 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 223 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 224 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 225 226 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 227 228 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 229 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 230 231 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 232 233 struct user *proc0paddr; 234 235 /* Prototypes */ 236 237 void consinit(void); 238 void kgdb_port_init(void); 239 240 /* A load of console goo. */ 241 #include "vga.h" 242 #if NVGA > 0 243 #include <dev/ic/mc6845reg.h> 244 #include <dev/ic/pcdisplayvar.h> 245 #include <dev/ic/vgareg.h> 246 #include <dev/ic/vgavar.h> 247 #endif 248 249 #include "com.h" 250 #if NCOM > 0 251 #include <dev/ic/comreg.h> 252 #include <dev/ic/comvar.h> 253 #endif 254 255 #include "sscom.h" 256 #if NSSCOM > 0 257 #include "opt_sscom.h" 258 #include <arm/s3c2xx0/sscom_var.h> 259 #endif 260 261 /* 262 * Define the default console speed for the board. This is generally 263 * what the firmware provided with the board defaults to. 264 */ 265 #ifndef CONSPEED 266 #define CONSPEED B115200 /* TTYDEF_SPEED */ 267 #endif 268 #ifndef CONMODE 269 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 270 #endif 271 272 int comcnspeed = CONSPEED; 273 int comcnmode = CONMODE; 274 275 /* 276 * void cpu_reboot(int howto, char *bootstr) 277 * 278 * Reboots the system 279 * 280 * Deal with any syncing, unmounting, dumping and shutdown hooks, 281 * then reset the CPU. 282 */ 283 void 284 cpu_reboot(int howto, char *bootstr) 285 { 286 287 cpu_reset_address = vtophys((u_int)s3c2800_softreset); 288 289 /* 290 * If we are still cold then hit the air brakes 291 * and crash to earth fast 292 */ 293 if (cold) { 294 doshutdownhooks(); 295 printf("The operating system has halted.\n"); 296 printf("Please press any key to reboot.\n\n"); 297 cngetc(); 298 printf("rebooting...\n"); 299 cpu_reset(); 300 /* NOTREACHED */ 301 } 302 /* Disable console buffering */ 303 304 /* 305 * If RB_NOSYNC was not specified sync the discs. 306 * Note: Unless cold is set to 1 here, syslogd will die during the 307 * unmount. It looks like syslogd is getting woken up only to find 308 * that it cannot page part of the binary in as the filesystem has 309 * been unmounted. 310 */ 311 if (!(howto & RB_NOSYNC)) 312 bootsync(); 313 314 /* Say NO to interrupts */ 315 splhigh(); 316 317 /* Do a dump if requested. */ 318 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 319 dumpsys(); 320 321 /* Run any shutdown hooks */ 322 doshutdownhooks(); 323 324 /* Make sure IRQ's are disabled */ 325 IRQdisable; 326 327 if (howto & RB_HALT) { 328 printf("The operating system has halted.\n"); 329 printf("Please press any key to reboot.\n\n"); 330 cngetc(); 331 } 332 printf("rebooting...\n"); 333 cpu_reset(); 334 /* NOTREACHED */ 335 } 336 337 /* 338 * All built-in peripheral registers are statically mapped in start up 339 * routine. This table tells pmap subsystem about it, and to map them 340 * at the same position. 341 */ 342 static const struct pmap_devmap smdk2800_devmap[] = { 343 { 344 SMDK2800_IO_AREA_VBASE, 345 S3C2800_PERIPHERALS, 346 S3C2800_PERIPHERALS_SIZE, 347 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 348 }, 349 { 0, 0, 0, 0 } 350 }; 351 352 #define ioreg_vaddr(pa) ((pa) - S3C2800_PERIPHERALS + SMDK2800_IO_AREA_VBASE) 353 #define ioreg32(pa) (*(volatile uint32_t *)ioreg_vaddr(pa)) 354 355 /* 356 * u_int initarm(...) 357 * 358 * Initial entry point on startup. This gets called before main() is 359 * entered. 360 * It should be responsible for setting up everything that must be 361 * in place when main is called. 362 * This includes 363 * Taking a copy of the boot configuration structure. 364 * Initialising the physical console so characters can be printed. 365 * Setting up page tables for the kernel 366 * Relocating the kernel to the bottom of physical memory 367 */ 368 369 u_int 370 initarm(void *arg) 371 { 372 int loop; 373 int loop1; 374 u_int l1pagetable; 375 extern int etext __asm("_etext"); 376 extern int end __asm("_end"); 377 int progress_counter = 0; 378 379 #ifdef DO_MEMORY_DISK 380 vm_offset_t md_root_start; 381 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 382 #endif 383 384 #define gpio8(reg) (*(volatile uint8_t *)(ioreg_vaddr(S3C2800_GPIO_BASE) + (reg))) 385 386 #define LEDSTEP() __LED(progress_counter++) 387 388 #define pdatc gpio8(GPIO_PDATC) 389 #define __LED(x) (pdatc = (pdatc & ~0x07) | (~(x) & 0x07)) 390 391 LEDSTEP(); 392 /* 393 * Heads up ... Setup the CPU / MMU / TLB functions 394 */ 395 if (set_cpufuncs()) 396 panic("CPU not recognized!"); 397 398 LEDSTEP(); 399 400 401 /* Disable all peripheral interrupts */ 402 ioreg32(S3C2800_INTCTL_BASE + INTCTL_INTMSK) = 0; 403 404 consinit(); 405 #ifdef VERBOSE_INIT_ARM 406 printf("consinit done\n"); 407 #endif 408 409 #ifdef KGDB 410 LEDSTEP(); 411 kgdb_port_init(); 412 #endif 413 LEDSTEP(); 414 415 #ifdef VERBOSE_INIT_ARM 416 /* Talk to the user */ 417 printf("\nNetBSD/evbarm (SMDK2800) booting ...\n"); 418 #endif 419 420 /* 421 * Ok we have the following memory map 422 * 423 * Physical Address Range Description 424 * ----------------------- ---------------------------------- 425 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 426 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 427 * or (depend on DIPSW setting) 428 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 429 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 430 * 431 * 0x08000000 - 0x09ffffff SDRAM (32MB) 432 * 0x20000000 - 0x3fffffff PCI space 433 * 434 * The initarm() has the responsibility for creating the kernel 435 * page tables. 436 * It must also set up various memory pointers that are used 437 * by pmap etc. 438 */ 439 440 /* Fake bootconfig structure for the benefit of pmap.c */ 441 /* XXX must make the memory description h/w independent */ 442 bootconfig.dramblocks = 1; 443 bootconfig.dram[0].address = SDRAM_START; 444 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 445 446 /* 447 * Set up the variables that define the availablilty of 448 * physical memory. For now, we're going to set 449 * physical_freestart to 0x08200000 (where the kernel 450 * was loaded), and allocate the memory we need downwards. 451 * If we get too close to the bottom of SDRAM, we 452 * will panic. We will update physical_freestart and 453 * physical_freeend later to reflect what pmap_bootstrap() 454 * wants to see. 455 * 456 * XXX pmap_bootstrap() needs an enema. 457 */ 458 physical_start = bootconfig.dram[0].address; 459 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 460 461 #if DO_MEMORY_DISK 462 #ifdef MEMORY_DISK_ROOT_ROM 463 md_root_start = MEMORY_DISK_ROOT_ADDR; 464 boothowto |= RB_RDONLY; 465 #else 466 /* Reserve physmem for ram disk */ 467 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 468 printf("Reserve %ld bytes for memory disk\n", 469 physical_end - md_root_start); 470 /* copy fs contents */ 471 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 472 MD_ROOT_SIZE); 473 physical_end = md_root_start; 474 #endif 475 #endif 476 477 physical_freestart = 0x08000000UL; /* XXX */ 478 physical_freeend = 0x08200000UL; 479 480 physmem = (physical_end - physical_start) / PAGE_SIZE; 481 482 #ifdef VERBOSE_INIT_ARM 483 /* Tell the user about the memory */ 484 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 485 physical_start, physical_end - 1); 486 #endif 487 488 /* 489 * XXX 490 * Okay, the kernel starts 2MB in from the bottom of physical 491 * memory. We are going to allocate our bootstrap pages downwards 492 * from there. 493 * 494 * We need to allocate some fixed page tables to get the kernel 495 * going. We allocate one page directory and a number of page 496 * tables and store the physical addresses in the kernel_pt_table 497 * array. 498 * 499 * The kernel page directory must be on a 16K boundary. The page 500 * tables must be on 4K boundaries. What we do is allocate the 501 * page directory on the first 16K boundary that we encounter, and 502 * the page tables on 4K boundaries otherwise. Since we allocate 503 * at least 3 L2 page tables, we are guaranteed to encounter at 504 * least one 16K aligned region. 505 */ 506 507 #ifdef VERBOSE_INIT_ARM 508 printf("Allocating page tables\n"); 509 #endif 510 511 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 515 physical_freestart, free_pages, free_pages); 516 #endif 517 518 /* Define a macro to simplify memory allocation */ 519 #define valloc_pages(var, np) \ 520 alloc_pages((var).pv_pa, (np)); \ 521 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 522 523 #define alloc_pages(var, np) \ 524 physical_freeend -= ((np) * PAGE_SIZE); \ 525 if (physical_freeend < physical_freestart) \ 526 panic("initarm: out of memory"); \ 527 (var) = physical_freeend; \ 528 free_pages -= (np); \ 529 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 530 531 loop1 = 0; 532 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 533 /* Are we 16KB aligned for an L1 ? */ 534 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 535 && kernel_l1pt.pv_pa == 0) { 536 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 537 } else { 538 valloc_pages(kernel_pt_table[loop1], 539 L2_TABLE_SIZE / PAGE_SIZE); 540 ++loop1; 541 } 542 } 543 544 /* This should never be able to happen but better confirm that. */ 545 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 546 panic("initarm: Failed to align the kernel page directory\n"); 547 548 /* 549 * Allocate a page for the system page mapped to V0x00000000 550 * This page will just contain the system vectors and can be 551 * shared by all processes. 552 */ 553 alloc_pages(systempage.pv_pa, 1); 554 555 /* Allocate stacks for all modes */ 556 valloc_pages(irqstack, IRQ_STACK_SIZE); 557 valloc_pages(abtstack, ABT_STACK_SIZE); 558 valloc_pages(undstack, UND_STACK_SIZE); 559 valloc_pages(kernelstack, UPAGES); 560 561 #ifdef VERBOSE_INIT_ARM 562 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 563 irqstack.pv_va); 564 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 565 abtstack.pv_va); 566 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 567 undstack.pv_va); 568 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 569 kernelstack.pv_va); 570 #endif 571 572 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 573 574 LEDSTEP(); 575 576 /* 577 * Ok we have allocated physical pages for the primary kernel 578 * page tables 579 */ 580 581 #ifdef VERBOSE_INIT_ARM 582 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 583 #endif 584 585 /* 586 * Now we start construction of the L1 page table 587 * We start by mapping the L2 page tables into the L1. 588 * This means that we can replace L1 mappings later on if necessary 589 */ 590 l1pagetable = kernel_l1pt.pv_pa; 591 592 /* Map the L2 pages tables in the L1 page table */ 593 pmap_link_l2pt(l1pagetable, 0x00000000, 594 &kernel_pt_table[KERNEL_PT_SYS]); 595 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 596 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 597 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 598 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 599 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 600 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 601 602 /* update the top of the kernel VM */ 603 pmap_curmaxkvaddr = 604 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("Mapping kernel\n"); 608 #endif 609 610 /* Now we fill in the L2 pagetable for the kernel static code/data */ 611 { 612 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 613 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 614 u_int logical; 615 616 textsize = (textsize + PGOFSET) & ~PGOFSET; 617 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 618 619 logical = 0x00200000; /* offset of kernel in RAM */ 620 621 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 622 physical_start + logical, textsize, 623 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 624 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 625 physical_start + logical, totalsize - textsize, 626 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 627 } 628 629 #ifdef VERBOSE_INIT_ARM 630 printf("Constructing L2 page tables\n"); 631 #endif 632 633 /* Map the stack pages */ 634 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 635 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 636 PTE_CACHE); 637 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 638 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 639 PTE_CACHE); 640 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 641 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 642 PTE_CACHE); 643 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 644 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 645 646 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 647 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 648 649 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 650 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 651 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 652 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 653 } 654 655 /* Map the vector page. */ 656 #if 1 657 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 658 * cache-clean code there. */ 659 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 660 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 661 #else 662 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 663 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 664 #endif 665 666 #ifdef MEMORY_DISK_DYNAMIC 667 /* map MD root image */ 668 pmap_map_chunk(l1pagetable, SMDK2800_MEMORY_DISK_VADDR, md_root_start, 669 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 670 671 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 672 #endif /* MEMORY_DISK_DYNAMIC */ 673 /* 674 * map integrated peripherals at same address in l1pagetable 675 * so that we can continue to use console. 676 */ 677 pmap_devmap_bootstrap(l1pagetable, smdk2800_devmap); 678 679 /* 680 * Now we have the real page tables in place so we can switch to them. 681 * Once this is done we will be running with the REAL kernel page 682 * tables. 683 */ 684 685 /* 686 * Update the physical_freestart/physical_freeend/free_pages 687 * variables. 688 */ 689 { 690 physical_freestart = physical_start + 691 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 692 physical_freeend = physical_end; 693 free_pages = 694 (physical_freeend - physical_freestart) / PAGE_SIZE; 695 } 696 697 /* Switch tables */ 698 #ifdef VERBOSE_INIT_ARM 699 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 700 physical_freestart, free_pages, free_pages); 701 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 702 #endif 703 LEDSTEP(); 704 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 705 setttb(kernel_l1pt.pv_pa); 706 cpu_tlb_flushID(); 707 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 708 709 /* 710 * Moved from cpu_startup() as data_abort_handler() references 711 * this during uvm init 712 */ 713 proc0paddr = (struct user *)kernelstack.pv_va; 714 lwp0.l_addr = proc0paddr; 715 716 #ifdef VERBOSE_INIT_ARM 717 printf("done!\n"); 718 #endif 719 720 #if 0 721 /* 722 * The IFPGA registers have just moved. 723 * Detach the diagnostic serial port and reattach at the new address. 724 */ 725 plcomcndetach(); 726 /* 727 * XXX this should only be done in main() but it useful to 728 * have output earlier ... 729 */ 730 consinit(); 731 #endif 732 733 LEDSTEP(); 734 #ifdef VERBOSE_INIT_ARM 735 printf("bootstrap done.\n"); 736 #endif 737 738 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 739 740 /* 741 * Pages were allocated during the secondary bootstrap for the 742 * stacks for different CPU modes. 743 * We must now set the r13 registers in the different CPU modes to 744 * point to these stacks. 745 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 746 * of the stack memory. 747 */ 748 #ifdef VERBOSE_INIT_ARM 749 printf("init subsystems: stacks "); 750 #endif 751 752 set_stackptr(PSR_IRQ32_MODE, 753 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 754 set_stackptr(PSR_ABT32_MODE, 755 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 756 set_stackptr(PSR_UND32_MODE, 757 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 758 759 LEDSTEP(); 760 761 /* 762 * Well we should set a data abort handler. 763 * Once things get going this will change as we will need a proper 764 * handler. 765 * Until then we will use a handler that just panics but tells us 766 * why. 767 * Initialisation of the vectors will just panic on a data abort. 768 * This just fills in a slightly better one. 769 */ 770 #ifdef VERBOSE_INIT_ARM 771 printf("vectors "); 772 #endif 773 data_abort_handler_address = (u_int)data_abort_handler; 774 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 775 undefined_handler_address = (u_int)undefinedinstruction_bounce; 776 777 /* Initialise the undefined instruction handlers */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("undefined "); 780 #endif 781 undefined_init(); 782 783 LEDSTEP(); 784 785 /* Load memory into UVM. */ 786 #ifdef VERBOSE_INIT_ARM 787 printf("page "); 788 #endif 789 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 790 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 791 atop(physical_freestart), atop(physical_freeend), 792 VM_FREELIST_DEFAULT); 793 794 LEDSTEP(); 795 /* Boot strap pmap telling it where the kernel page table is */ 796 #ifdef VERBOSE_INIT_ARM 797 printf("pmap "); 798 #endif 799 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 800 801 LEDSTEP(); 802 803 /* Setup the IRQ system */ 804 #ifdef VERBOSE_INIT_ARM 805 printf("irq "); 806 #endif 807 /* XXX irq_init(); */ 808 809 #ifdef VERBOSE_INIT_ARM 810 printf("done.\n"); 811 #endif 812 813 #ifdef BOOTHOWTO_INIT 814 boothowto |= BOOTHOWTO_INIT; 815 #endif 816 { 817 uint8_t gpio = ~gpio8(GPIO_PDATF); 818 819 if (gpio & (1<<5)) /* SW3 */ 820 boothowto ^= RB_SINGLE; 821 if (gpio & (1<<7)) /* SW7 */ 822 boothowto ^= RB_KDB; 823 #ifdef VERBOSE_INIT_ARM 824 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 825 #endif 826 } 827 828 #ifdef KGDB 829 if (boothowto & RB_KDB) { 830 kgdb_debug_init = 1; 831 kgdb_connect(1); 832 } 833 #endif 834 835 #if NKSYMS || defined(DDB) || defined(LKM) 836 /* Firmware doesn't load symbols. */ 837 ksyms_init(0, NULL, NULL); 838 #endif 839 840 #ifdef DDB 841 db_machine_init(); 842 if (boothowto & RB_KDB) 843 Debugger(); 844 #endif 845 846 /* We return the new stack pointer address */ 847 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 848 } 849 850 void 851 consinit(void) 852 { 853 static int consinit_done = 0; 854 bus_space_tag_t iot = &s3c2xx0_bs_tag; 855 int pclk; 856 857 if (consinit_done != 0) 858 return; 859 860 consinit_done = 1; 861 862 pmap_devmap_register(smdk2800_devmap); 863 864 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), NULL, NULL, &pclk); 865 866 #if NSSCOM > 0 867 #ifdef SSCOM0CONSOLE 868 if (0 == s3c2800_sscom_cnattach(iot, 0, comcnspeed, 869 pclk, comcnmode)) 870 return; 871 #endif 872 #ifdef SSCOM1CONSOLE 873 if (0 == s3c2800_sscom_cnattach(iot, 1, comcnspeed, 874 pclk, comcnmode)) 875 return; 876 #endif 877 #endif /* NSSCOM */ 878 #if NCOM>0 && defined(CONCOMADDR) 879 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 880 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 881 panic("can't init serial console @%x", CONCOMADDR); 882 return; 883 #endif 884 885 consinit_done = 0; 886 } 887 888 889 #ifdef KGDB 890 891 #if (NSSCOM > 0) 892 893 #ifdef KGDB_DEVNAME 894 const char kgdb_devname[] = KGDB_DEVNAME; 895 #else 896 const char kgdb_devname[] = ""; 897 #endif 898 899 #ifndef KGDB_DEVMODE 900 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 901 #endif 902 int kgdb_sscom_mode = KGDB_DEVMODE; 903 904 #endif /* NSSCOM */ 905 906 void 907 kgdb_port_init(void) 908 { 909 #if (NSSCOM > 0) 910 int unit = -1; 911 int pclk; 912 913 if (strcmp(kgdb_devname, "sscom0") == 0) 914 unit = 0; 915 else if (strcmp(kgdb_devname, "sscom1") == 0) 916 unit = 1; 917 918 if (unit >= 0) { 919 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), 920 NULL, NULL, &pclk); 921 922 s3c2800_sscom_kgdb_attach(&s3c2xx0_bs_tag, 923 unit, kgdb_rate, pclk, kgdb_sscom_mode); 924 } 925 #endif 926 } 927 #endif 928