1 /* $NetBSD: smdk2410_machdep.c,v 1.47 2024/02/20 23:36:01 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 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 * Copyright (c) 2001,2002 ARM Ltd 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. The name of the company may not be used to endorse or promote 47 * products derived from this software without specific prior written 48 * permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 52 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 53 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 54 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 55 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 56 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 57 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 58 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 59 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 60 * POSSIBILITY OF SUCH DAMAGE. 61 * 62 */ 63 64 /* 65 * Copyright (c) 1997,1998 Mark Brinicombe. 66 * Copyright (c) 1997,1998 Causality Limited. 67 * All rights reserved. 68 * 69 * Redistribution and use in source and binary forms, with or without 70 * modification, are permitted provided that the following conditions 71 * are met: 72 * 1. Redistributions of source code must retain the above copyright 73 * notice, this list of conditions and the following disclaimer. 74 * 2. Redistributions in binary form must reproduce the above copyright 75 * notice, this list of conditions and the following disclaimer in the 76 * documentation and/or other materials provided with the distribution. 77 * 3. All advertising materials mentioning features or use of this software 78 * must display the following acknowledgement: 79 * This product includes software developed by Mark Brinicombe 80 * for the NetBSD Project. 81 * 4. The name of the company nor the name of the author may be used to 82 * endorse or promote products derived from this software without specific 83 * prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 86 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 87 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 88 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 89 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 90 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 91 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * Machine dependent functions for kernel setup for integrator board 98 * 99 * Created : 24/11/97 100 */ 101 102 /* 103 * Machine dependent functions for kernel setup for Samsung SMDK2410 104 * derived from integrator_machdep.c 105 */ 106 107 #include <sys/cdefs.h> 108 __KERNEL_RCSID(0, "$NetBSD: smdk2410_machdep.c,v 1.47 2024/02/20 23:36:01 andvar Exp $"); 109 110 #include "opt_arm_debug.h" 111 #include "opt_console.h" 112 #include "opt_ddb.h" 113 #include "opt_kgdb.h" 114 #include "opt_md.h" 115 116 #include <sys/param.h> 117 #include <sys/device.h> 118 #include <sys/systm.h> 119 #include <sys/kernel.h> 120 #include <sys/exec.h> 121 #include <sys/proc.h> 122 #include <sys/msgbuf.h> 123 #include <sys/reboot.h> 124 #include <sys/termios.h> 125 #include <sys/ksyms.h> 126 #include <sys/bus.h> 127 #include <sys/cpu.h> 128 #include <sys/intr.h> 129 130 #include <uvm/uvm_extern.h> 131 132 #include <dev/cons.h> 133 #include <dev/md.h> 134 135 #include <machine/db_machdep.h> 136 #include <ddb/db_sym.h> 137 #include <ddb/db_extern.h> 138 #ifdef KGDB 139 #include <sys/kgdb.h> 140 #endif 141 142 #include <machine/bootconfig.h> 143 #include <arm/locore.h> 144 #include <arm/undefined.h> 145 146 #include <arm/arm32/machdep.h> 147 148 #include <arm/s3c2xx0/s3c2410reg.h> 149 #include <arm/s3c2xx0/s3c2410var.h> 150 151 #include "ksyms.h" 152 153 #ifndef SDRAM_START 154 #define SDRAM_START S3C2410_SDRAM_START 155 #endif 156 #ifndef SDRAM_SIZE 157 #define SDRAM_SIZE (32*1024*1024) 158 #endif 159 160 /* 161 * Address to map I/O registers in early initialize stage. 162 */ 163 #define SMDK2410_IO_VBASE 0xfd000000 164 165 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 166 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 167 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 168 169 /* 170 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 171 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 172 */ 173 #define KERNEL_VM_SIZE 0x0C000000 174 175 /* Memory disk support */ 176 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 177 #define DO_MEMORY_DISK 178 /* We have memory disk image outside of the kernel on ROM. */ 179 #ifdef MEMORY_DISK_ROOT_ROM 180 /* map the image directory and use read-only */ 181 #else 182 /* copy the image to RAM */ 183 #endif 184 #endif 185 186 BootConfig bootconfig; /* Boot config storage */ 187 char *boot_args = NULL; 188 char *boot_file = NULL; 189 190 vaddr_t physical_start; 191 vaddr_t physical_freestart; 192 vaddr_t physical_freeend; 193 vaddr_t physical_end; 194 u_int free_pages; 195 196 /*int debug_flags;*/ 197 #ifndef PMAP_STATIC_L1S 198 int max_processes = 64; /* Default number */ 199 #endif /* !PMAP_STATIC_L1S */ 200 201 paddr_t msgbufphys; 202 203 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 204 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 205 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 206 207 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 208 209 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 210 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 211 212 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 213 214 /* Prototypes */ 215 216 void consinit(void); 217 void kgdb_port_init(void); 218 219 220 #include "com.h" 221 #if NCOM > 0 222 #include <dev/ic/comreg.h> 223 #include <dev/ic/comvar.h> 224 #endif 225 226 #include "sscom.h" 227 #if NSSCOM > 0 228 #include "opt_sscom.h" 229 #include <arm/s3c2xx0/sscom_var.h> 230 #endif 231 232 /* 233 * Define the default console speed for the board. This is generally 234 * what the firmware provided with the board defaults to. 235 */ 236 #ifndef CONSPEED 237 #define CONSPEED B115200 /* TTYDEF_SPEED */ 238 #endif 239 #ifndef CONMODE 240 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 241 #endif 242 243 int comcnspeed = CONSPEED; 244 int comcnmode = CONMODE; 245 246 247 /* 248 * void cpu_reboot(int howto, char *bootstr) 249 * 250 * Reboots the system 251 * 252 * Deal with any syncing, unmounting, dumping and shutdown hooks, 253 * then reset the CPU. 254 */ 255 void 256 cpu_reboot(int howto, char *bootstr) 257 { 258 #ifdef DIAGNOSTIC 259 /* info */ 260 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 261 #endif 262 263 cpu_reset_address_paddr = vtophys((u_int)s3c2410_softreset); 264 265 /* 266 * If we are still cold then hit the air brakes 267 * and crash to earth fast 268 */ 269 if (cold) { 270 doshutdownhooks(); 271 pmf_system_shutdown(boothowto); 272 printf("The operating system has halted.\n"); 273 printf("Please press any key to reboot.\n\n"); 274 cngetc(); 275 printf("rebooting...\n"); 276 cpu_reset(); 277 /* NOTREACHED */ 278 } 279 /* Disable console buffering */ 280 281 /* 282 * If RB_NOSYNC was not specified sync the discs. 283 * Note: Unless cold is set to 1 here, syslogd will die during the 284 * unmount. It looks like syslogd is getting woken up only to find 285 * that it cannot page part of the binary in as the filesystem has 286 * been unmounted. 287 */ 288 if (!(howto & RB_NOSYNC)) 289 bootsync(); 290 291 /* Say NO to interrupts */ 292 splhigh(); 293 294 /* Do a dump if requested. */ 295 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 296 dumpsys(); 297 298 /* Run any shutdown hooks */ 299 doshutdownhooks(); 300 301 pmf_system_shutdown(boothowto); 302 303 /* Make sure IRQ's are disabled */ 304 IRQdisable; 305 306 if (howto & RB_HALT) { 307 printf("The operating system has halted.\n"); 308 printf("Please press any key to reboot.\n\n"); 309 cngetc(); 310 } 311 printf("rebooting...\n"); 312 cpu_reset(); 313 /* NOTREACHED */ 314 } 315 316 /* 317 * Static device mappings. These peripheral registers are mapped at 318 * fixed virtual addresses very early in initarm() so that we can use 319 * them while booting the kernel , and stay at the same address 320 * throughout whole kernel's life time. 321 * 322 * We use this table twice; once with bootstrap page table, and once 323 * with kernel's page table which we build up in initarm(). 324 * 325 * Since we map these registers into the bootstrap page table using 326 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 327 * registers segment-aligned and segment-rounded in order to avoid 328 * using the 2nd page tables. 329 */ 330 331 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 332 333 #define GPIO_VBASE _V(0) 334 #define INTCTL_VBASE _V(1) 335 #define CLKMAN_VBASE _V(2) 336 #define UART_VBASE _V(3) 337 #ifdef MEMORY_DISK_DYNAMIC 338 #define MEMORY_DISK_VADDR _V(4) 339 #endif 340 341 static const struct pmap_devmap smdk2410_devmap[] = { 342 /* GPIO registers */ 343 DEVMAP_ENTRY( 344 GPIO_VBASE, 345 S3C2410_GPIO_BASE, 346 S3C2410_GPIO_SIZE 347 ), 348 DEVMAP_ENTRY( 349 INTCTL_VBASE, 350 S3C2410_INTCTL_BASE, 351 S3C2410_INTCTL_SIZE 352 ), 353 DEVMAP_ENTRY( 354 CLKMAN_VBASE, 355 S3C2410_CLKMAN_BASE, 356 S3C24X0_CLKMAN_SIZE 357 ), 358 /* UART registers for UART0, 1, 2. */ 359 DEVMAP_ENTRY( 360 UART_VBASE, 361 S3C2410_UART0_BASE, 362 S3C2410_UART_BASE(3) - S3C2410_UART0_BASE 363 ), 364 365 DEVMAP_ENTRY_END 366 }; 367 368 static inline pd_entry_t * 369 read_ttb(void) 370 { 371 long ttb; 372 373 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 374 375 376 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 377 } 378 379 380 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 381 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 382 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 383 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 384 385 /* 386 * vaddr_t initarm(...) 387 * 388 * Initial entry point on startup. This gets called before main() is 389 * entered. 390 * It should be responsible for setting up everything that must be 391 * in place when main is called. 392 * This includes 393 * Taking a copy of the boot configuration structure. 394 * Initialising the physical console so characters can be printed. 395 * Setting up page tables for the kernel 396 * Relocating the kernel to the bottom of physical memory 397 */ 398 399 vaddr_t 400 initarm(void *arg) 401 { 402 int loop; 403 int loop1; 404 u_int l1pagetable; 405 extern int etext __asm("_etext"); 406 extern int end __asm("_end"); 407 int progress_counter = 0; 408 409 #ifdef DO_MEMORY_DISK 410 vaddr_t md_root_start; 411 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 412 #endif 413 414 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 415 416 #define LEDSTEP() __LED(progress_counter++) 417 418 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 419 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 420 421 LEDSTEP(); 422 423 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 424 * memory controller is set correctly. (USB download firmware 425 * doesn't do this right) Also, we use WAIT signal for them. 426 */ 427 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 428 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 429 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 430 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 431 /* tweak access timing for CS8900A */ 432 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 433 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 434 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 435 (0<<BANKCON_TCAH_SHIFT)); 436 437 /* 438 * Heads up ... Setup the CPU / MMU / TLB functions 439 */ 440 if (set_cpufuncs()) 441 panic("cpu not recognized!"); 442 443 LEDSTEP(); 444 445 /* 446 * Map I/O registers that are used in startup. Now we are 447 * still using page table prepared by bootloader. Later we'll 448 * map those registers at the same address in the kernel page 449 * table. 450 */ 451 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 452 453 #undef pdatf 454 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 455 456 457 LEDSTEP(); 458 459 /* Disable all peripheral interrupts */ 460 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 461 462 /* initialize some variables so that splfoo() doesn't 463 touch illegal address. */ 464 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 465 466 consinit(); 467 #ifdef VERBOSE_INIT_ARM 468 printf("consinit done\n"); 469 #endif 470 471 #ifdef KGDB 472 LEDSTEP(); 473 kgdb_port_init(); 474 #endif 475 LEDSTEP(); 476 477 #ifdef VERBOSE_INIT_ARM 478 /* Talk to the user */ 479 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 480 #endif 481 /* 482 * Ok we have the following memory map 483 * 484 * Physical Address Range Description 485 * ----------------------- ---------------------------------- 486 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 487 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 488 * or (depend on DIPSW setting) 489 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 490 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 491 * 492 * 0x30000000 - 0x31ffffff SDRAM (32MB) 493 * 494 * The initarm() has the responsibility for creating the kernel 495 * page tables. 496 * It must also set up various memory pointers that are used 497 * by pmap etc. 498 */ 499 500 /* Fake bootconfig structure for the benefit of pmap.c */ 501 /* XXX must make the memory description h/w independent */ 502 bootconfig.dramblocks = 1; 503 bootconfig.dram[0].address = SDRAM_START; 504 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 505 506 /* 507 * Set up the variables that define the availability of 508 * physical memory. For now, we're going to set 509 * physical_freestart to 0x08200000 (where the kernel 510 * was loaded), and allocate the memory we need downwards. 511 * If we get too close to the bottom of SDRAM, we 512 * will panic. We will update physical_freestart and 513 * physical_freeend later to reflect what pmap_bootstrap() 514 * wants to see. 515 * 516 * XXX pmap_bootstrap() needs an enema. 517 */ 518 physical_start = bootconfig.dram[0].address; 519 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 520 521 #ifdef DO_MEMORY_DISK 522 #ifdef MEMORY_DISK_ROOT_ROM 523 md_root_start = MEMORY_DISK_ROOT_ADDR; 524 boothowto |= RB_RDONLY; 525 #else 526 /* Reserve physmem for ram disk */ 527 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 528 printf("Reserve %ld bytes for memory disk\n", 529 physical_end - md_root_start); 530 /* copy fs contents */ 531 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 532 MD_ROOT_SIZE); 533 physical_end = md_root_start; 534 #endif 535 #endif 536 537 physical_freestart = SDRAM_START; /* XXX */ 538 physical_freeend = SDRAM_START + 0x00200000; 539 540 physmem = (physical_end - physical_start) / PAGE_SIZE; 541 542 #ifdef VERBOSE_INIT_ARM 543 /* Tell the user about the memory */ 544 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem, 545 physical_start, physical_end - 1); 546 #endif 547 548 /* 549 * XXX 550 * Okay, the kernel starts 2MB in from the bottom of physical 551 * memory. We are going to allocate our bootstrap pages downwards 552 * from there. 553 * 554 * We need to allocate some fixed page tables to get the kernel 555 * going. We allocate one page directory and a number of page 556 * tables and store the physical addresses in the kernel_pt_table 557 * array. 558 * 559 * The kernel page directory must be on a 16K boundary. The page 560 * tables must be on 4K boundaries. What we do is allocate the 561 * page directory on the first 16K boundary that we encounter, and 562 * the page tables on 4K boundaries otherwise. Since we allocate 563 * at least 3 L2 page tables, we are guaranteed to encounter at 564 * least one 16K aligned region. 565 */ 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Allocating page tables\n"); 569 #endif 570 571 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 575 physical_freestart, free_pages, free_pages); 576 #endif 577 578 /* Define a macro to simplify memory allocation */ 579 #define valloc_pages(var, np) \ 580 alloc_pages((var).pv_pa, (np)); \ 581 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 582 583 #define alloc_pages(var, np) \ 584 physical_freeend -= ((np) * PAGE_SIZE); \ 585 if (physical_freeend < physical_freestart) \ 586 panic("initarm: out of memory"); \ 587 (var) = physical_freeend; \ 588 free_pages -= (np); \ 589 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 590 591 loop1 = 0; 592 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 593 /* Are we 16KB aligned for an L1 ? */ 594 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 595 && kernel_l1pt.pv_pa == 0) { 596 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 597 } else { 598 valloc_pages(kernel_pt_table[loop1], 599 L2_TABLE_SIZE / PAGE_SIZE); 600 ++loop1; 601 } 602 } 603 604 /* This should never be able to happen but better confirm that. */ 605 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 606 panic("initarm: Failed to align the kernel page directory\n"); 607 608 /* 609 * Allocate a page for the system page mapped to V0x00000000 610 * This page will just contain the system vectors and can be 611 * shared by all processes. 612 */ 613 alloc_pages(systempage.pv_pa, 1); 614 615 /* Allocate stacks for all modes */ 616 valloc_pages(irqstack, IRQ_STACK_SIZE); 617 valloc_pages(abtstack, ABT_STACK_SIZE); 618 valloc_pages(undstack, UND_STACK_SIZE); 619 valloc_pages(kernelstack, UPAGES); 620 621 #ifdef VERBOSE_INIT_ARM 622 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 623 irqstack.pv_va); 624 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 625 abtstack.pv_va); 626 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 627 undstack.pv_va); 628 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 629 kernelstack.pv_va); 630 #endif 631 632 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 633 634 LEDSTEP(); 635 636 /* 637 * Ok we have allocated physical pages for the primary kernel 638 * page tables 639 */ 640 641 #ifdef VERBOSE_INIT_ARM 642 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 643 #endif 644 645 /* 646 * Now we start construction of the L1 page table 647 * We start by mapping the L2 page tables into the L1. 648 * This means that we can replace L1 mappings later on if necessary 649 */ 650 l1pagetable = kernel_l1pt.pv_pa; 651 652 /* Map the L2 pages tables in the L1 page table */ 653 pmap_link_l2pt(l1pagetable, 0x00000000, 654 &kernel_pt_table[KERNEL_PT_SYS]); 655 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 656 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 657 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 658 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 659 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 660 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 661 662 /* update the top of the kernel VM */ 663 pmap_curmaxkvaddr = 664 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("Mapping kernel\n"); 668 #endif 669 670 /* Now we fill in the L2 pagetable for the kernel static code/data */ 671 { 672 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 673 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 674 u_int logical; 675 676 textsize = (textsize + PGOFSET) & ~PGOFSET; 677 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 678 679 logical = 0x00200000; /* offset of kernel in RAM */ 680 681 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 682 physical_start + logical, textsize, 683 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 684 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 685 physical_start + logical, totalsize - textsize, 686 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 687 } 688 689 #ifdef VERBOSE_INIT_ARM 690 printf("Constructing L2 page tables\n"); 691 #endif 692 693 /* Map the stack pages */ 694 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 695 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 696 PTE_CACHE); 697 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 698 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 699 PTE_CACHE); 700 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 701 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 702 PTE_CACHE); 703 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 704 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 705 706 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 707 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 708 709 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 710 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 711 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 712 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 713 } 714 715 /* Map the vector page. */ 716 #if 1 717 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 718 * cache-clean code there. */ 719 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 720 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 721 #else 722 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 723 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 724 #endif 725 726 #ifdef MEMORY_DISK_DYNAMIC 727 /* map MD root image */ 728 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 729 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 730 731 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 732 #endif /* MEMORY_DISK_DYNAMIC */ 733 /* 734 * map integrated peripherals at same address in l1pagetable 735 * so that we can continue to use console. 736 */ 737 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 738 739 /* 740 * Now we have the real page tables in place so we can switch to them. 741 * Once this is done we will be running with the REAL kernel page 742 * tables. 743 */ 744 745 /* 746 * Update the physical_freestart/physical_freeend/free_pages 747 * variables. 748 */ 749 { 750 physical_freestart = physical_start + 751 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 752 physical_freeend = physical_end; 753 free_pages = 754 (physical_freeend - physical_freestart) / PAGE_SIZE; 755 } 756 757 /* Switch tables */ 758 #ifdef VERBOSE_INIT_ARM 759 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 760 physical_freestart, free_pages, free_pages); 761 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 762 #endif 763 LEDSTEP(); 764 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 765 cpu_setttb(kernel_l1pt.pv_pa, true); 766 cpu_tlb_flushID(); 767 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 768 769 /* 770 * Moved from cpu_startup() as data_abort_handler() references 771 * this during uvm init 772 */ 773 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 774 775 #ifdef VERBOSE_INIT_ARM 776 printf("done!\n"); 777 #endif 778 779 LEDSTEP(); 780 #ifdef VERBOSE_INIT_ARM 781 printf("bootstrap done.\n"); 782 #endif 783 784 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 785 786 /* 787 * Pages were allocated during the secondary bootstrap for the 788 * stacks for different CPU modes. 789 * We must now set the r13 registers in the different CPU modes to 790 * point to these stacks. 791 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 792 * of the stack memory. 793 */ 794 #ifdef VERBOSE_INIT_ARM 795 printf("init subsystems: stacks "); 796 #endif 797 798 set_stackptr(PSR_IRQ32_MODE, 799 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 800 set_stackptr(PSR_ABT32_MODE, 801 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 802 set_stackptr(PSR_UND32_MODE, 803 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 804 805 LEDSTEP(); 806 807 /* 808 * Well we should set a data abort handler. 809 * Once things get going this will change as we will need a proper 810 * handler. 811 * Until then we will use a handler that just panics but tells us 812 * why. 813 * Initialisation of the vectors will just panic on a data abort. 814 * This just fills in a slightly better one. 815 */ 816 #ifdef VERBOSE_INIT_ARM 817 printf("vectors "); 818 #endif 819 data_abort_handler_address = (u_int)data_abort_handler; 820 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 821 undefined_handler_address = (u_int)undefinedinstruction_bounce; 822 823 /* Initialise the undefined instruction handlers */ 824 #ifdef VERBOSE_INIT_ARM 825 printf("undefined "); 826 #endif 827 undefined_init(); 828 829 LEDSTEP(); 830 831 /* Load memory into UVM. */ 832 #ifdef VERBOSE_INIT_ARM 833 printf("page "); 834 #endif 835 uvm_md_init(); 836 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 837 atop(physical_freestart), atop(physical_freeend), 838 VM_FREELIST_DEFAULT); 839 840 LEDSTEP(); 841 /* Boot strap pmap telling it where managed kernel virtual memory is */ 842 #ifdef VERBOSE_INIT_ARM 843 printf("pmap "); 844 #endif 845 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 846 847 LEDSTEP(); 848 849 /* Setup the IRQ system */ 850 #ifdef VERBOSE_INIT_ARM 851 printf("irq "); 852 #endif 853 /* XXX irq_init(); */ 854 855 #ifdef VERBOSE_INIT_ARM 856 printf("done.\n"); 857 #endif 858 859 #ifdef BOOTHOWTO 860 boothowto |= BOOTHOWTO; 861 #endif 862 { 863 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 864 865 if (gpio & (1<<0)) /* SW1 (EINT0) */ 866 boothowto ^= RB_SINGLE; 867 if (gpio & (1<<2)) /* SW2 (EINT2) */ 868 boothowto ^= RB_KDB; 869 #ifdef VERBOSE_INIT_ARM 870 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 871 #endif 872 } 873 874 #ifdef KGDB 875 if (boothowto & RB_KDB) { 876 kgdb_debug_init = 1; 877 kgdb_connect(1); 878 } 879 #endif 880 881 #ifdef DDB 882 db_machine_init(); 883 if (boothowto & RB_KDB) 884 Debugger(); 885 #endif 886 887 /* We return the new stack pointer address */ 888 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 889 } 890 891 void 892 consinit(void) 893 { 894 static int consinit_done = 0; 895 bus_space_tag_t iot = &s3c2xx0_bs_tag; 896 int pclk; 897 898 if (consinit_done != 0) 899 return; 900 901 consinit_done = 1; 902 903 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 904 905 #if NSSCOM > 0 906 #ifdef SSCOM0CONSOLE 907 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 908 pclk, comcnmode)) 909 return; 910 #endif 911 #ifdef SSCOM1CONSOLE 912 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 913 pclk, comcnmode)) 914 return; 915 #endif 916 #endif /* NSSCOM */ 917 #if NCOM>0 && defined(CONCOMADDR) 918 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 919 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 920 panic("can't init serial console @%x", CONCOMADDR); 921 return; 922 #endif 923 924 consinit_done = 0; 925 } 926 927 928 #ifdef KGDB 929 930 #if (NSSCOM > 0) 931 932 #ifdef KGDB_DEVNAME 933 const char kgdb_devname[] = KGDB_DEVNAME; 934 #else 935 const char kgdb_devname[] = ""; 936 #endif 937 938 #ifndef KGDB_DEVMODE 939 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 940 #endif 941 int kgdb_sscom_mode = KGDB_DEVMODE; 942 943 #endif /* NSSCOM */ 944 945 void 946 kgdb_port_init(void) 947 { 948 #if (NSSCOM > 0) 949 int unit = -1; 950 int pclk; 951 952 if (strcmp(kgdb_devname, "sscom0") == 0) 953 unit = 0; 954 else if (strcmp(kgdb_devname, "sscom1") == 0) 955 unit = 1; 956 957 if (unit >= 0) { 958 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 959 960 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 961 unit, kgdb_rate, pclk, kgdb_sscom_mode); 962 } 963 #endif 964 } 965 #endif 966 967 static struct arm32_dma_range smdk2410_dma_ranges[1]; 968 969 bus_dma_tag_t 970 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 971 { 972 extern paddr_t physical_start, physical_end; 973 struct arm32_bus_dma_tag *dmat; 974 975 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 976 smdk2410_dma_ranges[0].dr_busbase = physical_start; 977 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 978 979 #if 1 980 dmat = dma_tag_template; 981 #else 982 dmat = malloc(sizeof *dmat, M_DEVBUF, M_WAITOK); 983 *dmat = *dma_tag_template; 984 #endif 985 986 dmat->_ranges = smdk2410_dma_ranges; 987 dmat->_nranges = 1; 988 989 return dmat; 990 } 991
Indexes created Wed Oct 01 19:09:53 GMT 2025