1 /* $NetBSD: smdk2800_machdep.c,v 1.52 2024/02/20 23:36:01 andvar 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 dependent functions for kernel setup for integrator board 99 * 100 * Created : 24/11/97 101 */ 102 103 /* 104 * Machine dependent 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 1.52 2024/02/20 23:36:01 andvar Exp $"); 110 111 #include "opt_ddb.h" 112 #include "opt_console.h" 113 #include "opt_kgdb.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 #include <sys/bus.h> 128 #include <sys/cpu.h> 129 #include <sys/intr.h> 130 131 #include <uvm/uvm_extern.h> 132 133 #include <dev/cons.h> 134 #include <dev/md.h> 135 136 #include <machine/db_machdep.h> 137 #include <ddb/db_sym.h> 138 #include <ddb/db_extern.h> 139 #ifdef KGDB 140 #include <sys/kgdb.h> 141 #endif 142 143 #include <machine/bootconfig.h> 144 #include <arm/locore.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 BootConfig bootconfig; /* Boot config storage */ 177 char *boot_args = NULL; 178 char *boot_file = NULL; 179 180 vaddr_t physical_start; 181 vaddr_t physical_freestart; 182 vaddr_t physical_freeend; 183 vaddr_t physical_end; 184 u_int free_pages; 185 186 /*int debug_flags;*/ 187 #ifndef PMAP_STATIC_L1S 188 int max_processes = 64; /* Default number */ 189 #endif /* !PMAP_STATIC_L1S */ 190 191 paddr_t msgbufphys; 192 193 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 194 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 195 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 196 197 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 198 199 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 200 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 201 202 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 203 204 /* Prototypes */ 205 206 void consinit(void); 207 void kgdb_port_init(void); 208 209 /* A load of console goo. */ 210 #include "vga.h" 211 #if NVGA > 0 212 #include <dev/ic/mc6845reg.h> 213 #include <dev/ic/pcdisplayvar.h> 214 #include <dev/ic/vgareg.h> 215 #include <dev/ic/vgavar.h> 216 #endif 217 218 #include "com.h" 219 #if NCOM > 0 220 #include <dev/ic/comreg.h> 221 #include <dev/ic/comvar.h> 222 #endif 223 224 #include "sscom.h" 225 #if NSSCOM > 0 226 #include "opt_sscom.h" 227 #include <arm/s3c2xx0/sscom_var.h> 228 #endif 229 230 /* 231 * Define the default console speed for the board. This is generally 232 * what the firmware provided with the board defaults to. 233 */ 234 #ifndef CONSPEED 235 #define CONSPEED B115200 /* TTYDEF_SPEED */ 236 #endif 237 #ifndef CONMODE 238 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 239 #endif 240 241 int comcnspeed = CONSPEED; 242 int comcnmode = CONMODE; 243 244 /* 245 * void cpu_reboot(int howto, char *bootstr) 246 * 247 * Reboots the system 248 * 249 * Deal with any syncing, unmounting, dumping and shutdown hooks, 250 * then reset the CPU. 251 */ 252 void 253 cpu_reboot(int howto, char *bootstr) 254 { 255 256 cpu_reset_address_paddr = vtophys((u_int)s3c2800_softreset); 257 258 /* 259 * If we are still cold then hit the air brakes 260 * and crash to earth fast 261 */ 262 if (cold) { 263 doshutdownhooks(); 264 pmf_system_shutdown(boothowto); 265 printf("The operating system has halted.\n"); 266 printf("Please press any key to reboot.\n\n"); 267 cngetc(); 268 printf("rebooting...\n"); 269 cpu_reset(); 270 /* NOTREACHED */ 271 } 272 /* Disable console buffering */ 273 274 /* 275 * If RB_NOSYNC was not specified sync the discs. 276 * Note: Unless cold is set to 1 here, syslogd will die during the 277 * unmount. It looks like syslogd is getting woken up only to find 278 * that it cannot page part of the binary in as the filesystem has 279 * been unmounted. 280 */ 281 if (!(howto & RB_NOSYNC)) 282 bootsync(); 283 284 /* Say NO to interrupts */ 285 splhigh(); 286 287 /* Do a dump if requested. */ 288 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 289 dumpsys(); 290 291 /* Run any shutdown hooks */ 292 doshutdownhooks(); 293 294 pmf_system_shutdown(boothowto); 295 296 /* Make sure IRQ's are disabled */ 297 IRQdisable; 298 299 if (howto & RB_HALT) { 300 printf("The operating system has halted.\n"); 301 printf("Please press any key to reboot.\n\n"); 302 cngetc(); 303 } 304 printf("rebooting...\n"); 305 cpu_reset(); 306 /* NOTREACHED */ 307 } 308 309 /* 310 * All built-in peripheral registers are statically mapped in start up 311 * routine. This table tells pmap subsystem about it, and to map them 312 * at the same position. 313 */ 314 static const struct pmap_devmap smdk2800_devmap[] = { 315 DEVMAP_ENTRY( 316 SMDK2800_IO_AREA_VBASE, 317 S3C2800_PERIPHERALS, 318 S3C2800_PERIPHERALS_SIZE 319 ), 320 DEVMAP_ENTRY_END 321 }; 322 323 #define ioreg_vaddr(pa) ((pa) - S3C2800_PERIPHERALS + SMDK2800_IO_AREA_VBASE) 324 #define ioreg32(pa) (*(volatile uint32_t *)ioreg_vaddr(pa)) 325 326 /* 327 * vaddr_t initarm(...) 328 * 329 * Initial entry point on startup. This gets called before main() is 330 * entered. 331 * It should be responsible for setting up everything that must be 332 * in place when main is called. 333 * This includes 334 * Taking a copy of the boot configuration structure. 335 * Initialising the physical console so characters can be printed. 336 * Setting up page tables for the kernel 337 * Relocating the kernel to the bottom of physical memory 338 */ 339 340 vaddr_t 341 initarm(void *arg) 342 { 343 int loop; 344 int loop1; 345 u_int l1pagetable; 346 extern int etext __asm("_etext"); 347 extern int end __asm("_end"); 348 int progress_counter = 0; 349 350 #ifdef DO_MEMORY_DISK 351 vaddr_t md_root_start; 352 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 353 #endif 354 355 #define gpio8(reg) (*(volatile uint8_t *)(ioreg_vaddr(S3C2800_GPIO_BASE) + (reg))) 356 357 #define LEDSTEP() __LED(progress_counter++) 358 359 #define pdatc gpio8(GPIO_PDATC) 360 #define __LED(x) (pdatc = (pdatc & ~0x07) | (~(x) & 0x07)) 361 362 LEDSTEP(); 363 /* 364 * Heads up ... Setup the CPU / MMU / TLB functions 365 */ 366 if (set_cpufuncs()) 367 panic("CPU not recognized!"); 368 369 LEDSTEP(); 370 371 372 /* Disable all peripheral interrupts */ 373 ioreg32(S3C2800_INTCTL_BASE + INTCTL_INTMSK) = 0; 374 375 consinit(); 376 #ifdef VERBOSE_INIT_ARM 377 printf("consinit done\n"); 378 #endif 379 380 #ifdef KGDB 381 LEDSTEP(); 382 kgdb_port_init(); 383 #endif 384 LEDSTEP(); 385 386 #ifdef VERBOSE_INIT_ARM 387 /* Talk to the user */ 388 printf("\nNetBSD/evbarm (SMDK2800) booting ...\n"); 389 #endif 390 391 /* 392 * Ok we have the following memory map 393 * 394 * Physical Address Range Description 395 * ----------------------- ---------------------------------- 396 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 397 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 398 * or (depend on DIPSW setting) 399 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 400 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 401 * 402 * 0x08000000 - 0x09ffffff SDRAM (32MB) 403 * 0x20000000 - 0x3fffffff PCI space 404 * 405 * The initarm() has the responsibility for creating the kernel 406 * page tables. 407 * It must also set up various memory pointers that are used 408 * by pmap etc. 409 */ 410 411 /* Fake bootconfig structure for the benefit of pmap.c */ 412 /* XXX must make the memory description h/w independent */ 413 bootconfig.dramblocks = 1; 414 bootconfig.dram[0].address = SDRAM_START; 415 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 416 417 /* 418 * Set up the variables that define the availability of 419 * physical memory. For now, we're going to set 420 * physical_freestart to 0x08200000 (where the kernel 421 * was loaded), and allocate the memory we need downwards. 422 * If we get too close to the bottom of SDRAM, we 423 * will panic. We will update physical_freestart and 424 * physical_freeend later to reflect what pmap_bootstrap() 425 * wants to see. 426 * 427 * XXX pmap_bootstrap() needs an enema. 428 */ 429 physical_start = bootconfig.dram[0].address; 430 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 431 432 #if DO_MEMORY_DISK 433 #ifdef MEMORY_DISK_ROOT_ROM 434 md_root_start = MEMORY_DISK_ROOT_ADDR; 435 boothowto |= RB_RDONLY; 436 #else 437 /* Reserve physmem for ram disk */ 438 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 439 printf("Reserve %ld bytes for memory disk\n", 440 physical_end - md_root_start); 441 /* copy fs contents */ 442 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 443 MD_ROOT_SIZE); 444 physical_end = md_root_start; 445 #endif 446 #endif 447 448 physical_freestart = 0x08000000UL; /* XXX */ 449 physical_freeend = 0x08200000UL; 450 451 physmem = (physical_end - physical_start) / PAGE_SIZE; 452 453 #ifdef VERBOSE_INIT_ARM 454 /* Tell the user about the memory */ 455 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 456 physical_start, physical_end - 1); 457 #endif 458 459 /* 460 * XXX 461 * Okay, the kernel starts 2MB in from the bottom of physical 462 * memory. We are going to allocate our bootstrap pages downwards 463 * from there. 464 * 465 * We need to allocate some fixed page tables to get the kernel 466 * going. We allocate one page directory and a number of page 467 * tables and store the physical addresses in the kernel_pt_table 468 * array. 469 * 470 * The kernel page directory must be on a 16K boundary. The page 471 * tables must be on 4K boundaries. What we do is allocate the 472 * page directory on the first 16K boundary that we encounter, and 473 * the page tables on 4K boundaries otherwise. Since we allocate 474 * at least 3 L2 page tables, we are guaranteed to encounter at 475 * least one 16K aligned region. 476 */ 477 478 #ifdef VERBOSE_INIT_ARM 479 printf("Allocating page tables\n"); 480 #endif 481 482 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 483 484 #ifdef VERBOSE_INIT_ARM 485 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 486 physical_freestart, free_pages, free_pages); 487 #endif 488 489 /* Define a macro to simplify memory allocation */ 490 #define valloc_pages(var, np) \ 491 alloc_pages((var).pv_pa, (np)); \ 492 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 493 494 #define alloc_pages(var, np) \ 495 physical_freeend -= ((np) * PAGE_SIZE); \ 496 if (physical_freeend < physical_freestart) \ 497 panic("initarm: out of memory"); \ 498 (var) = physical_freeend; \ 499 free_pages -= (np); \ 500 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 501 502 loop1 = 0; 503 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 504 /* Are we 16KB aligned for an L1 ? */ 505 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 506 && kernel_l1pt.pv_pa == 0) { 507 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 508 } else { 509 valloc_pages(kernel_pt_table[loop1], 510 L2_TABLE_SIZE / PAGE_SIZE); 511 ++loop1; 512 } 513 } 514 515 /* This should never be able to happen but better confirm that. */ 516 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 517 panic("initarm: Failed to align the kernel page directory\n"); 518 519 /* 520 * Allocate a page for the system page mapped to V0x00000000 521 * This page will just contain the system vectors and can be 522 * shared by all processes. 523 */ 524 alloc_pages(systempage.pv_pa, 1); 525 526 /* Allocate stacks for all modes */ 527 valloc_pages(irqstack, IRQ_STACK_SIZE); 528 valloc_pages(abtstack, ABT_STACK_SIZE); 529 valloc_pages(undstack, UND_STACK_SIZE); 530 valloc_pages(kernelstack, UPAGES); 531 532 #ifdef VERBOSE_INIT_ARM 533 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 534 irqstack.pv_va); 535 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 536 abtstack.pv_va); 537 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 538 undstack.pv_va); 539 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 540 kernelstack.pv_va); 541 #endif 542 543 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 544 545 LEDSTEP(); 546 547 /* 548 * Ok we have allocated physical pages for the primary kernel 549 * page tables 550 */ 551 552 #ifdef VERBOSE_INIT_ARM 553 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 554 #endif 555 556 /* 557 * Now we start construction of the L1 page table 558 * We start by mapping the L2 page tables into the L1. 559 * This means that we can replace L1 mappings later on if necessary 560 */ 561 l1pagetable = kernel_l1pt.pv_pa; 562 563 /* Map the L2 pages tables in the L1 page table */ 564 pmap_link_l2pt(l1pagetable, 0x00000000, 565 &kernel_pt_table[KERNEL_PT_SYS]); 566 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 567 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 568 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 569 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 570 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 571 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 572 573 /* update the top of the kernel VM */ 574 pmap_curmaxkvaddr = 575 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 576 577 #ifdef VERBOSE_INIT_ARM 578 printf("Mapping kernel\n"); 579 #endif 580 581 /* Now we fill in the L2 pagetable for the kernel static code/data */ 582 { 583 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 584 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 585 u_int logical; 586 587 textsize = (textsize + PGOFSET) & ~PGOFSET; 588 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 589 590 logical = 0x00200000; /* offset of kernel in RAM */ 591 592 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 593 physical_start + logical, textsize, 594 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 595 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 596 physical_start + logical, totalsize - textsize, 597 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 598 } 599 600 #ifdef VERBOSE_INIT_ARM 601 printf("Constructing L2 page tables\n"); 602 #endif 603 604 /* Map the stack pages */ 605 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 606 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 607 PTE_CACHE); 608 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 609 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 610 PTE_CACHE); 611 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 612 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 613 PTE_CACHE); 614 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 615 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 616 617 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 618 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 619 620 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 621 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 622 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 623 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 624 } 625 626 /* Map the vector page. */ 627 #if 1 628 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 629 * cache-clean code there. */ 630 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 631 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 632 #else 633 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 634 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 635 #endif 636 637 #ifdef MEMORY_DISK_DYNAMIC 638 /* map MD root image */ 639 pmap_map_chunk(l1pagetable, SMDK2800_MEMORY_DISK_VADDR, md_root_start, 640 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 641 642 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 643 #endif /* MEMORY_DISK_DYNAMIC */ 644 /* 645 * map integrated peripherals at same address in l1pagetable 646 * so that we can continue to use console. 647 */ 648 pmap_devmap_bootstrap(l1pagetable, smdk2800_devmap); 649 650 /* 651 * Now we have the real page tables in place so we can switch to them. 652 * Once this is done we will be running with the REAL kernel page 653 * tables. 654 */ 655 656 /* 657 * Update the physical_freestart/physical_freeend/free_pages 658 * variables. 659 */ 660 { 661 physical_freestart = physical_start + 662 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 663 physical_freeend = physical_end; 664 free_pages = 665 (physical_freeend - physical_freestart) / PAGE_SIZE; 666 } 667 668 /* Switch tables */ 669 #ifdef VERBOSE_INIT_ARM 670 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 671 physical_freestart, free_pages, free_pages); 672 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 673 #endif 674 LEDSTEP(); 675 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 676 cpu_setttb(kernel_l1pt.pv_pa, true); 677 cpu_tlb_flushID(); 678 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 679 680 /* 681 * Moved from cpu_startup() as data_abort_handler() references 682 * this during uvm init 683 */ 684 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 685 686 #ifdef VERBOSE_INIT_ARM 687 printf("done!\n"); 688 #endif 689 690 #if 0 691 /* 692 * The IFPGA registers have just moved. 693 * Detach the diagnostic serial port and reattach at the new address. 694 */ 695 plcomcndetach(); 696 /* 697 * XXX this should only be done in main() but it useful to 698 * have output earlier ... 699 */ 700 consinit(); 701 #endif 702 703 LEDSTEP(); 704 #ifdef VERBOSE_INIT_ARM 705 printf("bootstrap done.\n"); 706 #endif 707 708 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 709 710 /* 711 * Pages were allocated during the secondary bootstrap for the 712 * stacks for different CPU modes. 713 * We must now set the r13 registers in the different CPU modes to 714 * point to these stacks. 715 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 716 * of the stack memory. 717 */ 718 #ifdef VERBOSE_INIT_ARM 719 printf("init subsystems: stacks "); 720 #endif 721 722 set_stackptr(PSR_IRQ32_MODE, 723 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 724 set_stackptr(PSR_ABT32_MODE, 725 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 726 set_stackptr(PSR_UND32_MODE, 727 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 728 729 LEDSTEP(); 730 731 /* 732 * Well we should set a data abort handler. 733 * Once things get going this will change as we will need a proper 734 * handler. 735 * Until then we will use a handler that just panics but tells us 736 * why. 737 * Initialisation of the vectors will just panic on a data abort. 738 * This just fills in a slightly better one. 739 */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("vectors "); 742 #endif 743 data_abort_handler_address = (u_int)data_abort_handler; 744 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 745 undefined_handler_address = (u_int)undefinedinstruction_bounce; 746 747 /* Initialise the undefined instruction handlers */ 748 #ifdef VERBOSE_INIT_ARM 749 printf("undefined "); 750 #endif 751 undefined_init(); 752 753 LEDSTEP(); 754 755 /* Load memory into UVM. */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("page "); 758 #endif 759 uvm_md_init(); 760 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 761 atop(physical_freestart), atop(physical_freeend), 762 VM_FREELIST_DEFAULT); 763 764 LEDSTEP(); 765 /* Boot strap pmap telling it where managed kernel virtual memory is */ 766 #ifdef VERBOSE_INIT_ARM 767 printf("pmap "); 768 #endif 769 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 770 771 LEDSTEP(); 772 773 /* Setup the IRQ system */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("irq "); 776 #endif 777 /* XXX irq_init(); */ 778 779 #ifdef VERBOSE_INIT_ARM 780 printf("done.\n"); 781 #endif 782 783 #ifdef BOOTHOWTO_INIT 784 boothowto |= BOOTHOWTO_INIT; 785 #endif 786 { 787 uint8_t gpio = ~gpio8(GPIO_PDATF); 788 789 if (gpio & (1<<5)) /* SW3 */ 790 boothowto ^= RB_SINGLE; 791 if (gpio & (1<<7)) /* SW7 */ 792 boothowto ^= RB_KDB; 793 #ifdef VERBOSE_INIT_ARM 794 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 795 #endif 796 } 797 798 #ifdef KGDB 799 if (boothowto & RB_KDB) { 800 kgdb_debug_init = 1; 801 kgdb_connect(1); 802 } 803 #endif 804 805 #ifdef DDB 806 db_machine_init(); 807 if (boothowto & RB_KDB) 808 Debugger(); 809 #endif 810 811 /* We return the new stack pointer address */ 812 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 813 } 814 815 void 816 consinit(void) 817 { 818 static int consinit_done = 0; 819 bus_space_tag_t iot = &s3c2xx0_bs_tag; 820 int pclk; 821 822 if (consinit_done != 0) 823 return; 824 825 consinit_done = 1; 826 827 pmap_devmap_register(smdk2800_devmap); 828 829 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), NULL, NULL, &pclk); 830 831 #if NSSCOM > 0 832 #ifdef SSCOM0CONSOLE 833 if (0 == s3c2800_sscom_cnattach(iot, 0, comcnspeed, 834 pclk, comcnmode)) 835 return; 836 #endif 837 #ifdef SSCOM1CONSOLE 838 if (0 == s3c2800_sscom_cnattach(iot, 1, comcnspeed, 839 pclk, comcnmode)) 840 return; 841 #endif 842 #endif /* NSSCOM */ 843 #if NCOM>0 && defined(CONCOMADDR) 844 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 845 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 846 panic("can't init serial console @%x", CONCOMADDR); 847 return; 848 #endif 849 850 consinit_done = 0; 851 } 852 853 854 #ifdef KGDB 855 856 #if (NSSCOM > 0) 857 858 #ifdef KGDB_DEVNAME 859 const char kgdb_devname[] = KGDB_DEVNAME; 860 #else 861 const char kgdb_devname[] = ""; 862 #endif 863 864 #ifndef KGDB_DEVMODE 865 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 866 #endif 867 int kgdb_sscom_mode = KGDB_DEVMODE; 868 869 #endif /* NSSCOM */ 870 871 void 872 kgdb_port_init(void) 873 { 874 #if (NSSCOM > 0) 875 int unit = -1; 876 int pclk; 877 878 if (strcmp(kgdb_devname, "sscom0") == 0) 879 unit = 0; 880 else if (strcmp(kgdb_devname, "sscom1") == 0) 881 unit = 1; 882 883 if (unit >= 0) { 884 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), 885 NULL, NULL, &pclk); 886 887 s3c2800_sscom_kgdb_attach(&s3c2xx0_bs_tag, 888 unit, kgdb_rate, pclk, kgdb_sscom_mode); 889 } 890 #endif 891 } 892 #endif 893
Indexes created Tue Sep 30 20:09:53 GMT 2025