smdk2800_machdep.c revision 1.47
1 /* $NetBSD: smdk2800_machdep.c,v 1.47 2019/07/16 14:41:48 skrll 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 1.47 2019/07/16 14:41:48 skrll Exp $"); 110 111 #include "opt_ddb.h" 112 #include "opt_console.h" 113 #include "opt_kgdb.h" 114 #include "opt_pmap_debug.h" 115 #include "opt_md.h" 116 #include "pci.h" 117 118 #include <sys/param.h> 119 #include <sys/device.h> 120 #include <sys/systm.h> 121 #include <sys/kernel.h> 122 #include <sys/exec.h> 123 #include <sys/proc.h> 124 #include <sys/msgbuf.h> 125 #include <sys/reboot.h> 126 #include <sys/termios.h> 127 #include <sys/ksyms.h> 128 #include <sys/bus.h> 129 #include <sys/cpu.h> 130 #include <sys/intr.h> 131 132 #include <uvm/uvm_extern.h> 133 134 #include <dev/cons.h> 135 #include <dev/md.h> 136 137 #include <machine/db_machdep.h> 138 #include <ddb/db_sym.h> 139 #include <ddb/db_extern.h> 140 #ifdef KGDB 141 #include <sys/kgdb.h> 142 #endif 143 144 #include <machine/bootconfig.h> 145 #include <arm/locore.h> 146 #include <arm/undefined.h> 147 148 #include <arm/arm32/machdep.h> 149 150 #include <arm/s3c2xx0/s3c2800reg.h> 151 #include <arm/s3c2xx0/s3c2800var.h> 152 #include <evbarm/smdk2xx0/smdk2800var.h> 153 154 #include "ksyms.h" 155 156 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 157 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 158 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 159 160 /* 161 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 162 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 163 */ 164 #define KERNEL_VM_SIZE 0x0C000000 165 166 /* Memory disk support */ 167 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 168 #define DO_MEMORY_DISK 169 /* We have memory disk image outside of the kernel on ROM. */ 170 #ifdef MEMORY_DISK_ROOT_ROM 171 /* map the image directory and use read-only */ 172 #else 173 /* copy the image to RAM */ 174 #endif 175 #endif 176 177 BootConfig bootconfig; /* Boot config storage */ 178 char *boot_args = NULL; 179 char *boot_file = NULL; 180 181 vaddr_t physical_start; 182 vaddr_t physical_freestart; 183 vaddr_t physical_freeend; 184 vaddr_t physical_end; 185 u_int free_pages; 186 187 /*int debug_flags;*/ 188 #ifndef PMAP_STATIC_L1S 189 int max_processes = 64; /* Default number */ 190 #endif /* !PMAP_STATIC_L1S */ 191 192 paddr_t msgbufphys; 193 194 #ifdef PMAP_DEBUG 195 extern int pmap_debug_level; 196 #endif 197 198 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 199 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 200 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 201 202 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 203 204 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 205 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 206 207 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 208 209 /* Prototypes */ 210 211 void consinit(void); 212 void kgdb_port_init(void); 213 214 /* A load of console goo. */ 215 #include "vga.h" 216 #if NVGA > 0 217 #include <dev/ic/mc6845reg.h> 218 #include <dev/ic/pcdisplayvar.h> 219 #include <dev/ic/vgareg.h> 220 #include <dev/ic/vgavar.h> 221 #endif 222 223 #include "com.h" 224 #if NCOM > 0 225 #include <dev/ic/comreg.h> 226 #include <dev/ic/comvar.h> 227 #endif 228 229 #include "sscom.h" 230 #if NSSCOM > 0 231 #include "opt_sscom.h" 232 #include <arm/s3c2xx0/sscom_var.h> 233 #endif 234 235 /* 236 * Define the default console speed for the board. This is generally 237 * what the firmware provided with the board defaults to. 238 */ 239 #ifndef CONSPEED 240 #define CONSPEED B115200 /* TTYDEF_SPEED */ 241 #endif 242 #ifndef CONMODE 243 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 244 #endif 245 246 int comcnspeed = CONSPEED; 247 int comcnmode = CONMODE; 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 261 cpu_reset_address_paddr = vtophys((u_int)s3c2800_softreset); 262 263 /* 264 * If we are still cold then hit the air brakes 265 * and crash to earth fast 266 */ 267 if (cold) { 268 doshutdownhooks(); 269 pmf_system_shutdown(boothowto); 270 printf("The operating system has halted.\n"); 271 printf("Please press any key to reboot.\n\n"); 272 cngetc(); 273 printf("rebooting...\n"); 274 cpu_reset(); 275 /* NOTREACHED */ 276 } 277 /* Disable console buffering */ 278 279 /* 280 * If RB_NOSYNC was not specified sync the discs. 281 * Note: Unless cold is set to 1 here, syslogd will die during the 282 * unmount. It looks like syslogd is getting woken up only to find 283 * that it cannot page part of the binary in as the filesystem has 284 * been unmounted. 285 */ 286 if (!(howto & RB_NOSYNC)) 287 bootsync(); 288 289 /* Say NO to interrupts */ 290 splhigh(); 291 292 /* Do a dump if requested. */ 293 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 294 dumpsys(); 295 296 /* Run any shutdown hooks */ 297 doshutdownhooks(); 298 299 pmf_system_shutdown(boothowto); 300 301 /* Make sure IRQ's are disabled */ 302 IRQdisable; 303 304 if (howto & RB_HALT) { 305 printf("The operating system has halted.\n"); 306 printf("Please press any key to reboot.\n\n"); 307 cngetc(); 308 } 309 printf("rebooting...\n"); 310 cpu_reset(); 311 /* NOTREACHED */ 312 } 313 314 /* 315 * All built-in peripheral registers are statically mapped in start up 316 * routine. This table tells pmap subsystem about it, and to map them 317 * at the same position. 318 */ 319 static const struct pmap_devmap smdk2800_devmap[] = { 320 { 321 SMDK2800_IO_AREA_VBASE, 322 S3C2800_PERIPHERALS, 323 S3C2800_PERIPHERALS_SIZE, 324 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 325 }, 326 { 0, 0, 0, 0 } 327 }; 328 329 #define ioreg_vaddr(pa) ((pa) - S3C2800_PERIPHERALS + SMDK2800_IO_AREA_VBASE) 330 #define ioreg32(pa) (*(volatile uint32_t *)ioreg_vaddr(pa)) 331 332 /* 333 * vaddr_t initarm(...) 334 * 335 * Initial entry point on startup. This gets called before main() is 336 * entered. 337 * It should be responsible for setting up everything that must be 338 * in place when main is called. 339 * This includes 340 * Taking a copy of the boot configuration structure. 341 * Initialising the physical console so characters can be printed. 342 * Setting up page tables for the kernel 343 * Relocating the kernel to the bottom of physical memory 344 */ 345 346 vaddr_t 347 initarm(void *arg) 348 { 349 int loop; 350 int loop1; 351 u_int l1pagetable; 352 extern int etext __asm("_etext"); 353 extern int end __asm("_end"); 354 int progress_counter = 0; 355 356 #ifdef DO_MEMORY_DISK 357 vaddr_t md_root_start; 358 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 359 #endif 360 361 #define gpio8(reg) (*(volatile uint8_t *)(ioreg_vaddr(S3C2800_GPIO_BASE) + (reg))) 362 363 #define LEDSTEP() __LED(progress_counter++) 364 365 #define pdatc gpio8(GPIO_PDATC) 366 #define __LED(x) (pdatc = (pdatc & ~0x07) | (~(x) & 0x07)) 367 368 LEDSTEP(); 369 /* 370 * Heads up ... Setup the CPU / MMU / TLB functions 371 */ 372 if (set_cpufuncs()) 373 panic("CPU not recognized!"); 374 375 LEDSTEP(); 376 377 378 /* Disable all peripheral interrupts */ 379 ioreg32(S3C2800_INTCTL_BASE + INTCTL_INTMSK) = 0; 380 381 consinit(); 382 #ifdef VERBOSE_INIT_ARM 383 printf("consinit done\n"); 384 #endif 385 386 #ifdef KGDB 387 LEDSTEP(); 388 kgdb_port_init(); 389 #endif 390 LEDSTEP(); 391 392 #ifdef VERBOSE_INIT_ARM 393 /* Talk to the user */ 394 printf("\nNetBSD/evbarm (SMDK2800) booting ...\n"); 395 #endif 396 397 /* 398 * Ok we have the following memory map 399 * 400 * Physical Address Range Description 401 * ----------------------- ---------------------------------- 402 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 403 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 404 * or (depend on DIPSW setting) 405 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 406 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 407 * 408 * 0x08000000 - 0x09ffffff SDRAM (32MB) 409 * 0x20000000 - 0x3fffffff PCI space 410 * 411 * The initarm() has the responsibility for creating the kernel 412 * page tables. 413 * It must also set up various memory pointers that are used 414 * by pmap etc. 415 */ 416 417 /* Fake bootconfig structure for the benefit of pmap.c */ 418 /* XXX must make the memory description h/w independent */ 419 bootconfig.dramblocks = 1; 420 bootconfig.dram[0].address = SDRAM_START; 421 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 422 423 /* 424 * Set up the variables that define the availablilty of 425 * physical memory. For now, we're going to set 426 * physical_freestart to 0x08200000 (where the kernel 427 * was loaded), and allocate the memory we need downwards. 428 * If we get too close to the bottom of SDRAM, we 429 * will panic. We will update physical_freestart and 430 * physical_freeend later to reflect what pmap_bootstrap() 431 * wants to see. 432 * 433 * XXX pmap_bootstrap() needs an enema. 434 */ 435 physical_start = bootconfig.dram[0].address; 436 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 437 438 #if DO_MEMORY_DISK 439 #ifdef MEMORY_DISK_ROOT_ROM 440 md_root_start = MEMORY_DISK_ROOT_ADDR; 441 boothowto |= RB_RDONLY; 442 #else 443 /* Reserve physmem for ram disk */ 444 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 445 printf("Reserve %ld bytes for memory disk\n", 446 physical_end - md_root_start); 447 /* copy fs contents */ 448 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 449 MD_ROOT_SIZE); 450 physical_end = md_root_start; 451 #endif 452 #endif 453 454 physical_freestart = 0x08000000UL; /* XXX */ 455 physical_freeend = 0x08200000UL; 456 457 physmem = (physical_end - physical_start) / PAGE_SIZE; 458 459 #ifdef VERBOSE_INIT_ARM 460 /* Tell the user about the memory */ 461 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 462 physical_start, physical_end - 1); 463 #endif 464 465 /* 466 * XXX 467 * Okay, the kernel starts 2MB in from the bottom of physical 468 * memory. We are going to allocate our bootstrap pages downwards 469 * from there. 470 * 471 * We need to allocate some fixed page tables to get the kernel 472 * going. We allocate one page directory and a number of page 473 * tables and store the physical addresses in the kernel_pt_table 474 * array. 475 * 476 * The kernel page directory must be on a 16K boundary. The page 477 * tables must be on 4K boundaries. What we do is allocate the 478 * page directory on the first 16K boundary that we encounter, and 479 * the page tables on 4K boundaries otherwise. Since we allocate 480 * at least 3 L2 page tables, we are guaranteed to encounter at 481 * least one 16K aligned region. 482 */ 483 484 #ifdef VERBOSE_INIT_ARM 485 printf("Allocating page tables\n"); 486 #endif 487 488 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 489 490 #ifdef VERBOSE_INIT_ARM 491 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 492 physical_freestart, free_pages, free_pages); 493 #endif 494 495 /* Define a macro to simplify memory allocation */ 496 #define valloc_pages(var, np) \ 497 alloc_pages((var).pv_pa, (np)); \ 498 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 499 500 #define alloc_pages(var, np) \ 501 physical_freeend -= ((np) * PAGE_SIZE); \ 502 if (physical_freeend < physical_freestart) \ 503 panic("initarm: out of memory"); \ 504 (var) = physical_freeend; \ 505 free_pages -= (np); \ 506 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 507 508 loop1 = 0; 509 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 510 /* Are we 16KB aligned for an L1 ? */ 511 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 512 && kernel_l1pt.pv_pa == 0) { 513 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 514 } else { 515 valloc_pages(kernel_pt_table[loop1], 516 L2_TABLE_SIZE / PAGE_SIZE); 517 ++loop1; 518 } 519 } 520 521 /* This should never be able to happen but better confirm that. */ 522 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 523 panic("initarm: Failed to align the kernel page directory\n"); 524 525 /* 526 * Allocate a page for the system page mapped to V0x00000000 527 * This page will just contain the system vectors and can be 528 * shared by all processes. 529 */ 530 alloc_pages(systempage.pv_pa, 1); 531 532 /* Allocate stacks for all modes */ 533 valloc_pages(irqstack, IRQ_STACK_SIZE); 534 valloc_pages(abtstack, ABT_STACK_SIZE); 535 valloc_pages(undstack, UND_STACK_SIZE); 536 valloc_pages(kernelstack, UPAGES); 537 538 #ifdef VERBOSE_INIT_ARM 539 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 540 irqstack.pv_va); 541 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 542 abtstack.pv_va); 543 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 544 undstack.pv_va); 545 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 546 kernelstack.pv_va); 547 #endif 548 549 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 550 551 LEDSTEP(); 552 553 /* 554 * Ok we have allocated physical pages for the primary kernel 555 * page tables 556 */ 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 560 #endif 561 562 /* 563 * Now we start construction of the L1 page table 564 * We start by mapping the L2 page tables into the L1. 565 * This means that we can replace L1 mappings later on if necessary 566 */ 567 l1pagetable = kernel_l1pt.pv_pa; 568 569 /* Map the L2 pages tables in the L1 page table */ 570 pmap_link_l2pt(l1pagetable, 0x00000000, 571 &kernel_pt_table[KERNEL_PT_SYS]); 572 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 573 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 574 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 575 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 576 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 577 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 578 579 /* update the top of the kernel VM */ 580 pmap_curmaxkvaddr = 581 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 582 583 #ifdef VERBOSE_INIT_ARM 584 printf("Mapping kernel\n"); 585 #endif 586 587 /* Now we fill in the L2 pagetable for the kernel static code/data */ 588 { 589 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 590 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 591 u_int logical; 592 593 textsize = (textsize + PGOFSET) & ~PGOFSET; 594 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 595 596 logical = 0x00200000; /* offset of kernel in RAM */ 597 598 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 599 physical_start + logical, textsize, 600 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 601 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 602 physical_start + logical, totalsize - textsize, 603 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 604 } 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("Constructing L2 page tables\n"); 608 #endif 609 610 /* Map the stack pages */ 611 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 612 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 613 PTE_CACHE); 614 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 615 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 616 PTE_CACHE); 617 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 618 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 619 PTE_CACHE); 620 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 621 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 622 623 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 624 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 625 626 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 627 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 628 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 629 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 630 } 631 632 /* Map the vector page. */ 633 #if 1 634 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 635 * cache-clean code there. */ 636 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 637 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 638 #else 639 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 640 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 641 #endif 642 643 #ifdef MEMORY_DISK_DYNAMIC 644 /* map MD root image */ 645 pmap_map_chunk(l1pagetable, SMDK2800_MEMORY_DISK_VADDR, md_root_start, 646 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 647 648 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 649 #endif /* MEMORY_DISK_DYNAMIC */ 650 /* 651 * map integrated peripherals at same address in l1pagetable 652 * so that we can continue to use console. 653 */ 654 pmap_devmap_bootstrap(l1pagetable, smdk2800_devmap); 655 656 /* 657 * Now we have the real page tables in place so we can switch to them. 658 * Once this is done we will be running with the REAL kernel page 659 * tables. 660 */ 661 662 /* 663 * Update the physical_freestart/physical_freeend/free_pages 664 * variables. 665 */ 666 { 667 physical_freestart = physical_start + 668 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 669 physical_freeend = physical_end; 670 free_pages = 671 (physical_freeend - physical_freestart) / PAGE_SIZE; 672 } 673 674 /* Switch tables */ 675 #ifdef VERBOSE_INIT_ARM 676 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 677 physical_freestart, free_pages, free_pages); 678 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 679 #endif 680 LEDSTEP(); 681 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 682 cpu_setttb(kernel_l1pt.pv_pa, true); 683 cpu_tlb_flushID(); 684 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 685 686 /* 687 * Moved from cpu_startup() as data_abort_handler() references 688 * this during uvm init 689 */ 690 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 691 692 #ifdef VERBOSE_INIT_ARM 693 printf("done!\n"); 694 #endif 695 696 #if 0 697 /* 698 * The IFPGA registers have just moved. 699 * Detach the diagnostic serial port and reattach at the new address. 700 */ 701 plcomcndetach(); 702 /* 703 * XXX this should only be done in main() but it useful to 704 * have output earlier ... 705 */ 706 consinit(); 707 #endif 708 709 LEDSTEP(); 710 #ifdef VERBOSE_INIT_ARM 711 printf("bootstrap done.\n"); 712 #endif 713 714 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 715 716 /* 717 * Pages were allocated during the secondary bootstrap for the 718 * stacks for different CPU modes. 719 * We must now set the r13 registers in the different CPU modes to 720 * point to these stacks. 721 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 722 * of the stack memory. 723 */ 724 #ifdef VERBOSE_INIT_ARM 725 printf("init subsystems: stacks "); 726 #endif 727 728 set_stackptr(PSR_IRQ32_MODE, 729 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 730 set_stackptr(PSR_ABT32_MODE, 731 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 732 set_stackptr(PSR_UND32_MODE, 733 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 734 735 LEDSTEP(); 736 737 /* 738 * Well we should set a data abort handler. 739 * Once things get going this will change as we will need a proper 740 * handler. 741 * Until then we will use a handler that just panics but tells us 742 * why. 743 * Initialisation of the vectors will just panic on a data abort. 744 * This just fills in a slightly better one. 745 */ 746 #ifdef VERBOSE_INIT_ARM 747 printf("vectors "); 748 #endif 749 data_abort_handler_address = (u_int)data_abort_handler; 750 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 751 undefined_handler_address = (u_int)undefinedinstruction_bounce; 752 753 /* Initialise the undefined instruction handlers */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("undefined "); 756 #endif 757 undefined_init(); 758 759 LEDSTEP(); 760 761 /* Load memory into UVM. */ 762 #ifdef VERBOSE_INIT_ARM 763 printf("page "); 764 #endif 765 uvm_md_init(); 766 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 767 atop(physical_freestart), atop(physical_freeend), 768 VM_FREELIST_DEFAULT); 769 770 LEDSTEP(); 771 /* Boot strap pmap telling it where managed kernel virtual memory is */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("pmap "); 774 #endif 775 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 776 777 LEDSTEP(); 778 779 /* Setup the IRQ system */ 780 #ifdef VERBOSE_INIT_ARM 781 printf("irq "); 782 #endif 783 /* XXX irq_init(); */ 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("done.\n"); 787 #endif 788 789 #ifdef BOOTHOWTO_INIT 790 boothowto |= BOOTHOWTO_INIT; 791 #endif 792 { 793 uint8_t gpio = ~gpio8(GPIO_PDATF); 794 795 if (gpio & (1<<5)) /* SW3 */ 796 boothowto ^= RB_SINGLE; 797 if (gpio & (1<<7)) /* SW7 */ 798 boothowto ^= RB_KDB; 799 #ifdef VERBOSE_INIT_ARM 800 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 801 #endif 802 } 803 804 #ifdef KGDB 805 if (boothowto & RB_KDB) { 806 kgdb_debug_init = 1; 807 kgdb_connect(1); 808 } 809 #endif 810 811 #ifdef DDB 812 db_machine_init(); 813 if (boothowto & RB_KDB) 814 Debugger(); 815 #endif 816 817 /* We return the new stack pointer address */ 818 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 819 } 820 821 void 822 consinit(void) 823 { 824 static int consinit_done = 0; 825 bus_space_tag_t iot = &s3c2xx0_bs_tag; 826 int pclk; 827 828 if (consinit_done != 0) 829 return; 830 831 consinit_done = 1; 832 833 pmap_devmap_register(smdk2800_devmap); 834 835 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), NULL, NULL, &pclk); 836 837 #if NSSCOM > 0 838 #ifdef SSCOM0CONSOLE 839 if (0 == s3c2800_sscom_cnattach(iot, 0, comcnspeed, 840 pclk, comcnmode)) 841 return; 842 #endif 843 #ifdef SSCOM1CONSOLE 844 if (0 == s3c2800_sscom_cnattach(iot, 1, comcnspeed, 845 pclk, comcnmode)) 846 return; 847 #endif 848 #endif /* NSSCOM */ 849 #if NCOM>0 && defined(CONCOMADDR) 850 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 851 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 852 panic("can't init serial console @%x", CONCOMADDR); 853 return; 854 #endif 855 856 consinit_done = 0; 857 } 858 859 860 #ifdef KGDB 861 862 #if (NSSCOM > 0) 863 864 #ifdef KGDB_DEVNAME 865 const char kgdb_devname[] = KGDB_DEVNAME; 866 #else 867 const char kgdb_devname[] = ""; 868 #endif 869 870 #ifndef KGDB_DEVMODE 871 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 872 #endif 873 int kgdb_sscom_mode = KGDB_DEVMODE; 874 875 #endif /* NSSCOM */ 876 877 void 878 kgdb_port_init(void) 879 { 880 #if (NSSCOM > 0) 881 int unit = -1; 882 int pclk; 883 884 if (strcmp(kgdb_devname, "sscom0") == 0) 885 unit = 0; 886 else if (strcmp(kgdb_devname, "sscom1") == 0) 887 unit = 1; 888 889 if (unit >= 0) { 890 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), 891 NULL, NULL, &pclk); 892 893 s3c2800_sscom_kgdb_attach(&s3c2xx0_bs_tag, 894 unit, kgdb_rate, pclk, kgdb_sscom_mode); 895 } 896 #endif 897 } 898 #endif 899
Indexes created Wed Oct 01 13:09:50 GMT 2025