smdk2410_machdep.c revision 1.37
1 /* $NetBSD: smdk2410_machdep.c,v 1.37 2018/07/31 06:46:27 skrll 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 1.37 2018/07/31 06:46:27 skrll Exp $"); 109 110 #include "opt_arm_debug.h" 111 #include "opt_ddb.h" 112 #include "opt_kgdb.h" 113 #include "opt_pmap_debug.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 #ifdef PMAP_DEBUG 204 extern int pmap_debug_level; 205 #endif 206 207 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 208 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 209 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 210 211 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 212 213 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 214 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 215 216 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 217 218 /* Prototypes */ 219 220 void consinit(void); 221 void kgdb_port_init(void); 222 223 224 #include "com.h" 225 #if NCOM > 0 226 #include <dev/ic/comreg.h> 227 #include <dev/ic/comvar.h> 228 #endif 229 230 #include "sscom.h" 231 #if NSSCOM > 0 232 #include "opt_sscom.h" 233 #include <arm/s3c2xx0/sscom_var.h> 234 #endif 235 236 /* 237 * Define the default console speed for the board. This is generally 238 * what the firmware provided with the board defaults to. 239 */ 240 #ifndef CONSPEED 241 #define CONSPEED B115200 /* TTYDEF_SPEED */ 242 #endif 243 #ifndef CONMODE 244 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 245 #endif 246 247 int comcnspeed = CONSPEED; 248 int comcnmode = CONMODE; 249 250 251 /* 252 * void cpu_reboot(int howto, char *bootstr) 253 * 254 * Reboots the system 255 * 256 * Deal with any syncing, unmounting, dumping and shutdown hooks, 257 * then reset the CPU. 258 */ 259 void 260 cpu_reboot(int howto, char *bootstr) 261 { 262 #ifdef DIAGNOSTIC 263 /* info */ 264 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 265 #endif 266 267 cpu_reset_address_paddr = vtophys((u_int)s3c2410_softreset); 268 269 /* 270 * If we are still cold then hit the air brakes 271 * and crash to earth fast 272 */ 273 if (cold) { 274 doshutdownhooks(); 275 pmf_system_shutdown(boothowto); 276 printf("The operating system has halted.\n"); 277 printf("Please press any key to reboot.\n\n"); 278 cngetc(); 279 printf("rebooting...\n"); 280 cpu_reset(); 281 /* NOTREACHED */ 282 } 283 /* Disable console buffering */ 284 285 /* 286 * If RB_NOSYNC was not specified sync the discs. 287 * Note: Unless cold is set to 1 here, syslogd will die during the 288 * unmount. It looks like syslogd is getting woken up only to find 289 * that it cannot page part of the binary in as the filesystem has 290 * been unmounted. 291 */ 292 if (!(howto & RB_NOSYNC)) 293 bootsync(); 294 295 /* Say NO to interrupts */ 296 splhigh(); 297 298 /* Do a dump if requested. */ 299 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 300 dumpsys(); 301 302 /* Run any shutdown hooks */ 303 doshutdownhooks(); 304 305 pmf_system_shutdown(boothowto); 306 307 /* Make sure IRQ's are disabled */ 308 IRQdisable; 309 310 if (howto & RB_HALT) { 311 printf("The operating system has halted.\n"); 312 printf("Please press any key to reboot.\n\n"); 313 cngetc(); 314 } 315 printf("rebooting...\n"); 316 cpu_reset(); 317 /* NOTREACHED */ 318 } 319 320 /* 321 * Static device mappings. These peripheral registers are mapped at 322 * fixed virtual addresses very early in initarm() so that we can use 323 * them while booting the kernel , and stay at the same address 324 * throughout whole kernel's life time. 325 * 326 * We use this table twice; once with bootstrap page table, and once 327 * with kernel's page table which we build up in initarm(). 328 * 329 * Since we map these registers into the bootstrap page table using 330 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 331 * registers segment-aligned and segment-rounded in order to avoid 332 * using the 2nd page tables. 333 */ 334 335 #define _A(a) ((a) & ~L1_S_OFFSET) 336 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 337 338 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 339 340 #define GPIO_VBASE _V(0) 341 #define INTCTL_VBASE _V(1) 342 #define CLKMAN_VBASE _V(2) 343 #define UART_VBASE _V(3) 344 #ifdef MEMORY_DISK_DYNAMIC 345 #define MEMORY_DISK_VADDR _V(4) 346 #endif 347 348 static const struct pmap_devmap smdk2410_devmap[] = { 349 /* GPIO registers */ 350 { 351 GPIO_VBASE, 352 _A(S3C2410_GPIO_BASE), 353 _S(S3C2410_GPIO_SIZE), 354 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 355 }, 356 { 357 INTCTL_VBASE, 358 _A(S3C2410_INTCTL_BASE), 359 _S(S3C2410_INTCTL_SIZE), 360 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 361 }, 362 { 363 CLKMAN_VBASE, 364 _A(S3C2410_CLKMAN_BASE), 365 _S(S3C24X0_CLKMAN_SIZE), 366 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 367 }, 368 { /* UART registers for UART0, 1, 2. */ 369 UART_VBASE, 370 _A(S3C2410_UART0_BASE), 371 _S(S3C2410_UART_BASE(3) - S3C2410_UART0_BASE), 372 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 373 }, 374 375 { 0, 0, 0, 0 } 376 }; 377 378 #undef _A 379 #undef _S 380 381 static inline pd_entry_t * 382 read_ttb(void) 383 { 384 long ttb; 385 386 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 387 388 389 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 390 } 391 392 393 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 394 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 395 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 396 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 397 398 /* 399 * u_int initarm(...) 400 * 401 * Initial entry point on startup. This gets called before main() is 402 * entered. 403 * It should be responsible for setting up everything that must be 404 * in place when main is called. 405 * This includes 406 * Taking a copy of the boot configuration structure. 407 * Initialising the physical console so characters can be printed. 408 * Setting up page tables for the kernel 409 * Relocating the kernel to the bottom of physical memory 410 */ 411 412 u_int 413 initarm(void *arg) 414 { 415 int loop; 416 int loop1; 417 u_int l1pagetable; 418 extern int etext __asm("_etext"); 419 extern int end __asm("_end"); 420 int progress_counter = 0; 421 422 #ifdef DO_MEMORY_DISK 423 vaddr_t md_root_start; 424 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 425 #endif 426 427 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 428 429 #define LEDSTEP() __LED(progress_counter++) 430 431 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 432 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 433 434 LEDSTEP(); 435 436 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 437 * memory controller is set correctly. (USB download firmware 438 * doesn't do this right) Also, we use WAIT signal for them. 439 */ 440 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 441 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 442 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 443 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 444 /* tweak access timing for CS8900A */ 445 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 446 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 447 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 448 (0<<BANKCON_TCAH_SHIFT)); 449 450 /* 451 * Heads up ... Setup the CPU / MMU / TLB functions 452 */ 453 if (set_cpufuncs()) 454 panic("cpu not recognized!"); 455 456 LEDSTEP(); 457 458 /* 459 * Map I/O registers that are used in startup. Now we are 460 * still using page table prepared by bootloader. Later we'll 461 * map those registers at the same address in the kernel page 462 * table. 463 */ 464 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 465 466 #undef pdatf 467 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 468 469 470 LEDSTEP(); 471 472 /* Disable all peripheral interrupts */ 473 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 474 475 /* initialize some variables so that splfoo() doesn't 476 touch illegal address. */ 477 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 478 479 consinit(); 480 #ifdef VERBOSE_INIT_ARM 481 printf("consinit done\n"); 482 #endif 483 484 #ifdef KGDB 485 LEDSTEP(); 486 kgdb_port_init(); 487 #endif 488 LEDSTEP(); 489 490 #ifdef VERBOSE_INIT_ARM 491 /* Talk to the user */ 492 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 493 #endif 494 /* 495 * Ok we have the following memory map 496 * 497 * Physical Address Range Description 498 * ----------------------- ---------------------------------- 499 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 500 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 501 * or (depend on DIPSW setting) 502 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 503 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 504 * 505 * 0x30000000 - 0x31ffffff SDRAM (32MB) 506 * 507 * The initarm() has the responsibility for creating the kernel 508 * page tables. 509 * It must also set up various memory pointers that are used 510 * by pmap etc. 511 */ 512 513 /* Fake bootconfig structure for the benefit of pmap.c */ 514 /* XXX must make the memory description h/w independent */ 515 bootconfig.dramblocks = 1; 516 bootconfig.dram[0].address = SDRAM_START; 517 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 518 519 /* 520 * Set up the variables that define the availablilty of 521 * physical memory. For now, we're going to set 522 * physical_freestart to 0x08200000 (where the kernel 523 * was loaded), and allocate the memory we need downwards. 524 * If we get too close to the bottom of SDRAM, we 525 * will panic. We will update physical_freestart and 526 * physical_freeend later to reflect what pmap_bootstrap() 527 * wants to see. 528 * 529 * XXX pmap_bootstrap() needs an enema. 530 */ 531 physical_start = bootconfig.dram[0].address; 532 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 533 534 #ifdef DO_MEMORY_DISK 535 #ifdef MEMORY_DISK_ROOT_ROM 536 md_root_start = MEMORY_DISK_ROOT_ADDR; 537 boothowto |= RB_RDONLY; 538 #else 539 /* Reserve physmem for ram disk */ 540 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 541 printf("Reserve %ld bytes for memory disk\n", 542 physical_end - md_root_start); 543 /* copy fs contents */ 544 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 545 MD_ROOT_SIZE); 546 physical_end = md_root_start; 547 #endif 548 #endif 549 550 physical_freestart = SDRAM_START; /* XXX */ 551 physical_freeend = SDRAM_START + 0x00200000; 552 553 physmem = (physical_end - physical_start) / PAGE_SIZE; 554 555 #ifdef VERBOSE_INIT_ARM 556 /* Tell the user about the memory */ 557 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 558 physical_start, physical_end - 1); 559 #endif 560 561 /* 562 * XXX 563 * Okay, the kernel starts 2MB in from the bottom of physical 564 * memory. We are going to allocate our bootstrap pages downwards 565 * from there. 566 * 567 * We need to allocate some fixed page tables to get the kernel 568 * going. We allocate one page directory and a number of page 569 * tables and store the physical addresses in the kernel_pt_table 570 * array. 571 * 572 * The kernel page directory must be on a 16K boundary. The page 573 * tables must be on 4K boundaries. What we do is allocate the 574 * page directory on the first 16K boundary that we encounter, and 575 * the page tables on 4K boundaries otherwise. Since we allocate 576 * at least 3 L2 page tables, we are guaranteed to encounter at 577 * least one 16K aligned region. 578 */ 579 580 #ifdef VERBOSE_INIT_ARM 581 printf("Allocating page tables\n"); 582 #endif 583 584 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 588 physical_freestart, free_pages, free_pages); 589 #endif 590 591 /* Define a macro to simplify memory allocation */ 592 #define valloc_pages(var, np) \ 593 alloc_pages((var).pv_pa, (np)); \ 594 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 595 596 #define alloc_pages(var, np) \ 597 physical_freeend -= ((np) * PAGE_SIZE); \ 598 if (physical_freeend < physical_freestart) \ 599 panic("initarm: out of memory"); \ 600 (var) = physical_freeend; \ 601 free_pages -= (np); \ 602 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 603 604 loop1 = 0; 605 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 606 /* Are we 16KB aligned for an L1 ? */ 607 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 608 && kernel_l1pt.pv_pa == 0) { 609 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 610 } else { 611 valloc_pages(kernel_pt_table[loop1], 612 L2_TABLE_SIZE / PAGE_SIZE); 613 ++loop1; 614 } 615 } 616 617 /* This should never be able to happen but better confirm that. */ 618 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 619 panic("initarm: Failed to align the kernel page directory\n"); 620 621 /* 622 * Allocate a page for the system page mapped to V0x00000000 623 * This page will just contain the system vectors and can be 624 * shared by all processes. 625 */ 626 alloc_pages(systempage.pv_pa, 1); 627 628 /* Allocate stacks for all modes */ 629 valloc_pages(irqstack, IRQ_STACK_SIZE); 630 valloc_pages(abtstack, ABT_STACK_SIZE); 631 valloc_pages(undstack, UND_STACK_SIZE); 632 valloc_pages(kernelstack, UPAGES); 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 636 irqstack.pv_va); 637 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 638 abtstack.pv_va); 639 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 640 undstack.pv_va); 641 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 642 kernelstack.pv_va); 643 #endif 644 645 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 646 647 LEDSTEP(); 648 649 /* 650 * Ok we have allocated physical pages for the primary kernel 651 * page tables 652 */ 653 654 #ifdef VERBOSE_INIT_ARM 655 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 656 #endif 657 658 /* 659 * Now we start construction of the L1 page table 660 * We start by mapping the L2 page tables into the L1. 661 * This means that we can replace L1 mappings later on if necessary 662 */ 663 l1pagetable = kernel_l1pt.pv_pa; 664 665 /* Map the L2 pages tables in the L1 page table */ 666 pmap_link_l2pt(l1pagetable, 0x00000000, 667 &kernel_pt_table[KERNEL_PT_SYS]); 668 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 669 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 670 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 671 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 672 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 673 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 674 675 /* update the top of the kernel VM */ 676 pmap_curmaxkvaddr = 677 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 678 679 #ifdef VERBOSE_INIT_ARM 680 printf("Mapping kernel\n"); 681 #endif 682 683 /* Now we fill in the L2 pagetable for the kernel static code/data */ 684 { 685 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 686 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 687 u_int logical; 688 689 textsize = (textsize + PGOFSET) & ~PGOFSET; 690 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 691 692 logical = 0x00200000; /* offset of kernel in RAM */ 693 694 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 695 physical_start + logical, textsize, 696 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 697 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 698 physical_start + logical, totalsize - textsize, 699 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 700 } 701 702 #ifdef VERBOSE_INIT_ARM 703 printf("Constructing L2 page tables\n"); 704 #endif 705 706 /* Map the stack pages */ 707 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 708 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 709 PTE_CACHE); 710 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 711 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 712 PTE_CACHE); 713 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 714 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 715 PTE_CACHE); 716 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 717 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 718 719 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 720 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 721 722 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 723 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 724 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 725 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 726 } 727 728 /* Map the vector page. */ 729 #if 1 730 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 731 * cache-clean code there. */ 732 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 733 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 734 #else 735 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 736 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 737 #endif 738 739 #ifdef MEMORY_DISK_DYNAMIC 740 /* map MD root image */ 741 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 742 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 743 744 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 745 #endif /* MEMORY_DISK_DYNAMIC */ 746 /* 747 * map integrated peripherals at same address in l1pagetable 748 * so that we can continue to use console. 749 */ 750 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 751 752 /* 753 * Now we have the real page tables in place so we can switch to them. 754 * Once this is done we will be running with the REAL kernel page 755 * tables. 756 */ 757 758 /* 759 * Update the physical_freestart/physical_freeend/free_pages 760 * variables. 761 */ 762 { 763 physical_freestart = physical_start + 764 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 765 physical_freeend = physical_end; 766 free_pages = 767 (physical_freeend - physical_freestart) / PAGE_SIZE; 768 } 769 770 /* Switch tables */ 771 #ifdef VERBOSE_INIT_ARM 772 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 773 physical_freestart, free_pages, free_pages); 774 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 775 #endif 776 LEDSTEP(); 777 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 778 cpu_setttb(kernel_l1pt.pv_pa, true); 779 cpu_tlb_flushID(); 780 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 781 782 /* 783 * Moved from cpu_startup() as data_abort_handler() references 784 * this during uvm init 785 */ 786 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 787 788 #ifdef VERBOSE_INIT_ARM 789 printf("done!\n"); 790 #endif 791 792 LEDSTEP(); 793 #ifdef VERBOSE_INIT_ARM 794 printf("bootstrap done.\n"); 795 #endif 796 797 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 798 799 /* 800 * Pages were allocated during the secondary bootstrap for the 801 * stacks for different CPU modes. 802 * We must now set the r13 registers in the different CPU modes to 803 * point to these stacks. 804 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 805 * of the stack memory. 806 */ 807 #ifdef VERBOSE_INIT_ARM 808 printf("init subsystems: stacks "); 809 #endif 810 811 set_stackptr(PSR_IRQ32_MODE, 812 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 813 set_stackptr(PSR_ABT32_MODE, 814 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 815 set_stackptr(PSR_UND32_MODE, 816 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 817 818 LEDSTEP(); 819 820 /* 821 * Well we should set a data abort handler. 822 * Once things get going this will change as we will need a proper 823 * handler. 824 * Until then we will use a handler that just panics but tells us 825 * why. 826 * Initialisation of the vectors will just panic on a data abort. 827 * This just fills in a slightly better one. 828 */ 829 #ifdef VERBOSE_INIT_ARM 830 printf("vectors "); 831 #endif 832 data_abort_handler_address = (u_int)data_abort_handler; 833 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 834 undefined_handler_address = (u_int)undefinedinstruction_bounce; 835 836 /* Initialise the undefined instruction handlers */ 837 #ifdef VERBOSE_INIT_ARM 838 printf("undefined "); 839 #endif 840 undefined_init(); 841 842 LEDSTEP(); 843 844 /* Load memory into UVM. */ 845 #ifdef VERBOSE_INIT_ARM 846 printf("page "); 847 #endif 848 uvm_md_init(); 849 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 850 atop(physical_freestart), atop(physical_freeend), 851 VM_FREELIST_DEFAULT); 852 853 LEDSTEP(); 854 /* Boot strap pmap telling it where the kernel page table is */ 855 #ifdef VERBOSE_INIT_ARM 856 printf("pmap "); 857 #endif 858 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 859 860 LEDSTEP(); 861 862 /* Setup the IRQ system */ 863 #ifdef VERBOSE_INIT_ARM 864 printf("irq "); 865 #endif 866 /* XXX irq_init(); */ 867 868 #ifdef VERBOSE_INIT_ARM 869 printf("done.\n"); 870 #endif 871 872 #ifdef BOOTHOWTO 873 boothowto |= BOOTHOWTO; 874 #endif 875 { 876 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 877 878 if (gpio & (1<<0)) /* SW1 (EINT0) */ 879 boothowto ^= RB_SINGLE; 880 if (gpio & (1<<2)) /* SW2 (EINT2) */ 881 boothowto ^= RB_KDB; 882 #ifdef VERBOSE_INIT_ARM 883 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 884 #endif 885 } 886 887 #ifdef KGDB 888 if (boothowto & RB_KDB) { 889 kgdb_debug_init = 1; 890 kgdb_connect(1); 891 } 892 #endif 893 894 #ifdef DDB 895 db_machine_init(); 896 if (boothowto & RB_KDB) 897 Debugger(); 898 #endif 899 900 /* We return the new stack pointer address */ 901 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 902 } 903 904 void 905 consinit(void) 906 { 907 static int consinit_done = 0; 908 bus_space_tag_t iot = &s3c2xx0_bs_tag; 909 int pclk; 910 911 if (consinit_done != 0) 912 return; 913 914 consinit_done = 1; 915 916 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 917 918 #if NSSCOM > 0 919 #ifdef SSCOM0CONSOLE 920 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 921 pclk, comcnmode)) 922 return; 923 #endif 924 #ifdef SSCOM1CONSOLE 925 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 926 pclk, comcnmode)) 927 return; 928 #endif 929 #endif /* NSSCOM */ 930 #if NCOM>0 && defined(CONCOMADDR) 931 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 932 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 933 panic("can't init serial console @%x", CONCOMADDR); 934 return; 935 #endif 936 937 consinit_done = 0; 938 } 939 940 941 #ifdef KGDB 942 943 #if (NSSCOM > 0) 944 945 #ifdef KGDB_DEVNAME 946 const char kgdb_devname[] = KGDB_DEVNAME; 947 #else 948 const char kgdb_devname[] = ""; 949 #endif 950 951 #ifndef KGDB_DEVMODE 952 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 953 #endif 954 int kgdb_sscom_mode = KGDB_DEVMODE; 955 956 #endif /* NSSCOM */ 957 958 void 959 kgdb_port_init(void) 960 { 961 #if (NSSCOM > 0) 962 int unit = -1; 963 int pclk; 964 965 if (strcmp(kgdb_devname, "sscom0") == 0) 966 unit = 0; 967 else if (strcmp(kgdb_devname, "sscom1") == 0) 968 unit = 1; 969 970 if (unit >= 0) { 971 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 972 973 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 974 unit, kgdb_rate, pclk, kgdb_sscom_mode); 975 } 976 #endif 977 } 978 #endif 979 980 static struct arm32_dma_range smdk2410_dma_ranges[1]; 981 982 bus_dma_tag_t 983 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 984 { 985 extern paddr_t physical_start, physical_end; 986 struct arm32_bus_dma_tag *dmat; 987 988 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 989 smdk2410_dma_ranges[0].dr_busbase = physical_start; 990 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 991 992 #if 1 993 dmat = dma_tag_template; 994 #else 995 dmat = malloc(sizeof *dmat, M_DEVBUF, M_NOWAIT); 996 if (dmat == NULL) 997 return NULL; 998 *dmat = *dma_tag_template; 999 #endif 1000 1001 dmat->_ranges = smdk2410_dma_ranges; 1002 dmat->_nranges = 1; 1003 1004 return dmat; 1005 } 1006
Indexes created Thu Oct 02 01:09:59 GMT 2025