smdk2410_machdep.c revision 1.42.6.1
1 /* $NetBSD: smdk2410_machdep.c,v 1.42.6.1 2020/04/20 11:28:56 bouyer 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 1.42.6.1 2020/04/20 11:28:56 bouyer 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 _A(a) ((a) & ~L1_S_OFFSET) 332 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 333 334 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 335 336 #define GPIO_VBASE _V(0) 337 #define INTCTL_VBASE _V(1) 338 #define CLKMAN_VBASE _V(2) 339 #define UART_VBASE _V(3) 340 #ifdef MEMORY_DISK_DYNAMIC 341 #define MEMORY_DISK_VADDR _V(4) 342 #endif 343 344 static const struct pmap_devmap smdk2410_devmap[] = { 345 /* GPIO registers */ 346 { 347 GPIO_VBASE, 348 _A(S3C2410_GPIO_BASE), 349 _S(S3C2410_GPIO_SIZE), 350 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 351 }, 352 { 353 INTCTL_VBASE, 354 _A(S3C2410_INTCTL_BASE), 355 _S(S3C2410_INTCTL_SIZE), 356 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 357 }, 358 { 359 CLKMAN_VBASE, 360 _A(S3C2410_CLKMAN_BASE), 361 _S(S3C24X0_CLKMAN_SIZE), 362 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 363 }, 364 { /* UART registers for UART0, 1, 2. */ 365 UART_VBASE, 366 _A(S3C2410_UART0_BASE), 367 _S(S3C2410_UART_BASE(3) - S3C2410_UART0_BASE), 368 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 369 }, 370 371 { 0, 0, 0, 0 } 372 }; 373 374 #undef _A 375 #undef _S 376 377 static inline pd_entry_t * 378 read_ttb(void) 379 { 380 long ttb; 381 382 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 383 384 385 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 386 } 387 388 389 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 390 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 391 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 392 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 393 394 /* 395 * vaddr_t initarm(...) 396 * 397 * Initial entry point on startup. This gets called before main() is 398 * entered. 399 * It should be responsible for setting up everything that must be 400 * in place when main is called. 401 * This includes 402 * Taking a copy of the boot configuration structure. 403 * Initialising the physical console so characters can be printed. 404 * Setting up page tables for the kernel 405 * Relocating the kernel to the bottom of physical memory 406 */ 407 408 vaddr_t 409 initarm(void *arg) 410 { 411 int loop; 412 int loop1; 413 u_int l1pagetable; 414 extern int etext __asm("_etext"); 415 extern int end __asm("_end"); 416 int progress_counter = 0; 417 418 #ifdef DO_MEMORY_DISK 419 vaddr_t md_root_start; 420 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 421 #endif 422 423 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 424 425 #define LEDSTEP() __LED(progress_counter++) 426 427 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 428 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 429 430 LEDSTEP(); 431 432 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 433 * memory controller is set correctly. (USB download firmware 434 * doesn't do this right) Also, we use WAIT signal for them. 435 */ 436 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 437 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 438 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 439 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 440 /* tweak access timing for CS8900A */ 441 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 442 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 443 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 444 (0<<BANKCON_TCAH_SHIFT)); 445 446 /* 447 * Heads up ... Setup the CPU / MMU / TLB functions 448 */ 449 if (set_cpufuncs()) 450 panic("cpu not recognized!"); 451 452 LEDSTEP(); 453 454 /* 455 * Map I/O registers that are used in startup. Now we are 456 * still using page table prepared by bootloader. Later we'll 457 * map those registers at the same address in the kernel page 458 * table. 459 */ 460 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 461 462 #undef pdatf 463 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 464 465 466 LEDSTEP(); 467 468 /* Disable all peripheral interrupts */ 469 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 470 471 /* initialize some variables so that splfoo() doesn't 472 touch illegal address. */ 473 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 474 475 consinit(); 476 #ifdef VERBOSE_INIT_ARM 477 printf("consinit done\n"); 478 #endif 479 480 #ifdef KGDB 481 LEDSTEP(); 482 kgdb_port_init(); 483 #endif 484 LEDSTEP(); 485 486 #ifdef VERBOSE_INIT_ARM 487 /* Talk to the user */ 488 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 489 #endif 490 /* 491 * Ok we have the following memory map 492 * 493 * Physical Address Range Description 494 * ----------------------- ---------------------------------- 495 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 496 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 497 * or (depend on DIPSW setting) 498 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 499 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 500 * 501 * 0x30000000 - 0x31ffffff SDRAM (32MB) 502 * 503 * The initarm() has the responsibility for creating the kernel 504 * page tables. 505 * It must also set up various memory pointers that are used 506 * by pmap etc. 507 */ 508 509 /* Fake bootconfig structure for the benefit of pmap.c */ 510 /* XXX must make the memory description h/w independent */ 511 bootconfig.dramblocks = 1; 512 bootconfig.dram[0].address = SDRAM_START; 513 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 514 515 /* 516 * Set up the variables that define the availablilty of 517 * physical memory. For now, we're going to set 518 * physical_freestart to 0x08200000 (where the kernel 519 * was loaded), and allocate the memory we need downwards. 520 * If we get too close to the bottom of SDRAM, we 521 * will panic. We will update physical_freestart and 522 * physical_freeend later to reflect what pmap_bootstrap() 523 * wants to see. 524 * 525 * XXX pmap_bootstrap() needs an enema. 526 */ 527 physical_start = bootconfig.dram[0].address; 528 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 529 530 #ifdef DO_MEMORY_DISK 531 #ifdef MEMORY_DISK_ROOT_ROM 532 md_root_start = MEMORY_DISK_ROOT_ADDR; 533 boothowto |= RB_RDONLY; 534 #else 535 /* Reserve physmem for ram disk */ 536 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 537 printf("Reserve %ld bytes for memory disk\n", 538 physical_end - md_root_start); 539 /* copy fs contents */ 540 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 541 MD_ROOT_SIZE); 542 physical_end = md_root_start; 543 #endif 544 #endif 545 546 physical_freestart = SDRAM_START; /* XXX */ 547 physical_freeend = SDRAM_START + 0x00200000; 548 549 physmem = (physical_end - physical_start) / PAGE_SIZE; 550 551 #ifdef VERBOSE_INIT_ARM 552 /* Tell the user about the memory */ 553 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 554 physical_start, physical_end - 1); 555 #endif 556 557 /* 558 * XXX 559 * Okay, the kernel starts 2MB in from the bottom of physical 560 * memory. We are going to allocate our bootstrap pages downwards 561 * from there. 562 * 563 * We need to allocate some fixed page tables to get the kernel 564 * going. We allocate one page directory and a number of page 565 * tables and store the physical addresses in the kernel_pt_table 566 * array. 567 * 568 * The kernel page directory must be on a 16K boundary. The page 569 * tables must be on 4K boundaries. What we do is allocate the 570 * page directory on the first 16K boundary that we encounter, and 571 * the page tables on 4K boundaries otherwise. Since we allocate 572 * at least 3 L2 page tables, we are guaranteed to encounter at 573 * least one 16K aligned region. 574 */ 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("Allocating page tables\n"); 578 #endif 579 580 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 581 582 #ifdef VERBOSE_INIT_ARM 583 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 584 physical_freestart, free_pages, free_pages); 585 #endif 586 587 /* Define a macro to simplify memory allocation */ 588 #define valloc_pages(var, np) \ 589 alloc_pages((var).pv_pa, (np)); \ 590 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 591 592 #define alloc_pages(var, np) \ 593 physical_freeend -= ((np) * PAGE_SIZE); \ 594 if (physical_freeend < physical_freestart) \ 595 panic("initarm: out of memory"); \ 596 (var) = physical_freeend; \ 597 free_pages -= (np); \ 598 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 599 600 loop1 = 0; 601 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 602 /* Are we 16KB aligned for an L1 ? */ 603 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 604 && kernel_l1pt.pv_pa == 0) { 605 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 606 } else { 607 valloc_pages(kernel_pt_table[loop1], 608 L2_TABLE_SIZE / PAGE_SIZE); 609 ++loop1; 610 } 611 } 612 613 /* This should never be able to happen but better confirm that. */ 614 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 615 panic("initarm: Failed to align the kernel page directory\n"); 616 617 /* 618 * Allocate a page for the system page mapped to V0x00000000 619 * This page will just contain the system vectors and can be 620 * shared by all processes. 621 */ 622 alloc_pages(systempage.pv_pa, 1); 623 624 /* Allocate stacks for all modes */ 625 valloc_pages(irqstack, IRQ_STACK_SIZE); 626 valloc_pages(abtstack, ABT_STACK_SIZE); 627 valloc_pages(undstack, UND_STACK_SIZE); 628 valloc_pages(kernelstack, UPAGES); 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 632 irqstack.pv_va); 633 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 634 abtstack.pv_va); 635 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 636 undstack.pv_va); 637 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 638 kernelstack.pv_va); 639 #endif 640 641 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 642 643 LEDSTEP(); 644 645 /* 646 * Ok we have allocated physical pages for the primary kernel 647 * page tables 648 */ 649 650 #ifdef VERBOSE_INIT_ARM 651 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 652 #endif 653 654 /* 655 * Now we start construction of the L1 page table 656 * We start by mapping the L2 page tables into the L1. 657 * This means that we can replace L1 mappings later on if necessary 658 */ 659 l1pagetable = kernel_l1pt.pv_pa; 660 661 /* Map the L2 pages tables in the L1 page table */ 662 pmap_link_l2pt(l1pagetable, 0x00000000, 663 &kernel_pt_table[KERNEL_PT_SYS]); 664 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 665 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 666 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 667 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 668 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 669 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 670 671 /* update the top of the kernel VM */ 672 pmap_curmaxkvaddr = 673 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("Mapping kernel\n"); 677 #endif 678 679 /* Now we fill in the L2 pagetable for the kernel static code/data */ 680 { 681 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 682 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 683 u_int logical; 684 685 textsize = (textsize + PGOFSET) & ~PGOFSET; 686 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 687 688 logical = 0x00200000; /* offset of kernel in RAM */ 689 690 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 691 physical_start + logical, textsize, 692 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 693 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 694 physical_start + logical, totalsize - textsize, 695 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 696 } 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("Constructing L2 page tables\n"); 700 #endif 701 702 /* Map the stack pages */ 703 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 704 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 705 PTE_CACHE); 706 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 707 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 708 PTE_CACHE); 709 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 710 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 711 PTE_CACHE); 712 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 713 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 714 715 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 716 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 717 718 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 719 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 720 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 721 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 722 } 723 724 /* Map the vector page. */ 725 #if 1 726 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 727 * cache-clean code there. */ 728 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 729 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 730 #else 731 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 732 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 733 #endif 734 735 #ifdef MEMORY_DISK_DYNAMIC 736 /* map MD root image */ 737 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 738 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 739 740 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 741 #endif /* MEMORY_DISK_DYNAMIC */ 742 /* 743 * map integrated peripherals at same address in l1pagetable 744 * so that we can continue to use console. 745 */ 746 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 747 748 /* 749 * Now we have the real page tables in place so we can switch to them. 750 * Once this is done we will be running with the REAL kernel page 751 * tables. 752 */ 753 754 /* 755 * Update the physical_freestart/physical_freeend/free_pages 756 * variables. 757 */ 758 { 759 physical_freestart = physical_start + 760 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 761 physical_freeend = physical_end; 762 free_pages = 763 (physical_freeend - physical_freestart) / PAGE_SIZE; 764 } 765 766 /* Switch tables */ 767 #ifdef VERBOSE_INIT_ARM 768 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 769 physical_freestart, free_pages, free_pages); 770 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 771 #endif 772 LEDSTEP(); 773 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 774 cpu_setttb(kernel_l1pt.pv_pa, true); 775 cpu_tlb_flushID(); 776 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 777 778 /* 779 * Moved from cpu_startup() as data_abort_handler() references 780 * this during uvm init 781 */ 782 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 783 784 #ifdef VERBOSE_INIT_ARM 785 printf("done!\n"); 786 #endif 787 788 LEDSTEP(); 789 #ifdef VERBOSE_INIT_ARM 790 printf("bootstrap done.\n"); 791 #endif 792 793 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 794 795 /* 796 * Pages were allocated during the secondary bootstrap for the 797 * stacks for different CPU modes. 798 * We must now set the r13 registers in the different CPU modes to 799 * point to these stacks. 800 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 801 * of the stack memory. 802 */ 803 #ifdef VERBOSE_INIT_ARM 804 printf("init subsystems: stacks "); 805 #endif 806 807 set_stackptr(PSR_IRQ32_MODE, 808 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 809 set_stackptr(PSR_ABT32_MODE, 810 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 811 set_stackptr(PSR_UND32_MODE, 812 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 813 814 LEDSTEP(); 815 816 /* 817 * Well we should set a data abort handler. 818 * Once things get going this will change as we will need a proper 819 * handler. 820 * Until then we will use a handler that just panics but tells us 821 * why. 822 * Initialisation of the vectors will just panic on a data abort. 823 * This just fills in a slightly better one. 824 */ 825 #ifdef VERBOSE_INIT_ARM 826 printf("vectors "); 827 #endif 828 data_abort_handler_address = (u_int)data_abort_handler; 829 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 830 undefined_handler_address = (u_int)undefinedinstruction_bounce; 831 832 /* Initialise the undefined instruction handlers */ 833 #ifdef VERBOSE_INIT_ARM 834 printf("undefined "); 835 #endif 836 undefined_init(); 837 838 LEDSTEP(); 839 840 /* Load memory into UVM. */ 841 #ifdef VERBOSE_INIT_ARM 842 printf("page "); 843 #endif 844 uvm_md_init(); 845 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 846 atop(physical_freestart), atop(physical_freeend), 847 VM_FREELIST_DEFAULT); 848 849 LEDSTEP(); 850 /* Boot strap pmap telling it where managed kernel virtual memory is */ 851 #ifdef VERBOSE_INIT_ARM 852 printf("pmap "); 853 #endif 854 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 855 856 LEDSTEP(); 857 858 /* Setup the IRQ system */ 859 #ifdef VERBOSE_INIT_ARM 860 printf("irq "); 861 #endif 862 /* XXX irq_init(); */ 863 864 #ifdef VERBOSE_INIT_ARM 865 printf("done.\n"); 866 #endif 867 868 #ifdef BOOTHOWTO 869 boothowto |= BOOTHOWTO; 870 #endif 871 { 872 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 873 874 if (gpio & (1<<0)) /* SW1 (EINT0) */ 875 boothowto ^= RB_SINGLE; 876 if (gpio & (1<<2)) /* SW2 (EINT2) */ 877 boothowto ^= RB_KDB; 878 #ifdef VERBOSE_INIT_ARM 879 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 880 #endif 881 } 882 883 #ifdef KGDB 884 if (boothowto & RB_KDB) { 885 kgdb_debug_init = 1; 886 kgdb_connect(1); 887 } 888 #endif 889 890 #ifdef DDB 891 db_machine_init(); 892 if (boothowto & RB_KDB) 893 Debugger(); 894 #endif 895 896 /* We return the new stack pointer address */ 897 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 898 } 899 900 void 901 consinit(void) 902 { 903 static int consinit_done = 0; 904 bus_space_tag_t iot = &s3c2xx0_bs_tag; 905 int pclk; 906 907 if (consinit_done != 0) 908 return; 909 910 consinit_done = 1; 911 912 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 913 914 #if NSSCOM > 0 915 #ifdef SSCOM0CONSOLE 916 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 917 pclk, comcnmode)) 918 return; 919 #endif 920 #ifdef SSCOM1CONSOLE 921 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 922 pclk, comcnmode)) 923 return; 924 #endif 925 #endif /* NSSCOM */ 926 #if NCOM>0 && defined(CONCOMADDR) 927 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 928 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 929 panic("can't init serial console @%x", CONCOMADDR); 930 return; 931 #endif 932 933 consinit_done = 0; 934 } 935 936 937 #ifdef KGDB 938 939 #if (NSSCOM > 0) 940 941 #ifdef KGDB_DEVNAME 942 const char kgdb_devname[] = KGDB_DEVNAME; 943 #else 944 const char kgdb_devname[] = ""; 945 #endif 946 947 #ifndef KGDB_DEVMODE 948 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 949 #endif 950 int kgdb_sscom_mode = KGDB_DEVMODE; 951 952 #endif /* NSSCOM */ 953 954 void 955 kgdb_port_init(void) 956 { 957 #if (NSSCOM > 0) 958 int unit = -1; 959 int pclk; 960 961 if (strcmp(kgdb_devname, "sscom0") == 0) 962 unit = 0; 963 else if (strcmp(kgdb_devname, "sscom1") == 0) 964 unit = 1; 965 966 if (unit >= 0) { 967 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 968 969 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 970 unit, kgdb_rate, pclk, kgdb_sscom_mode); 971 } 972 #endif 973 } 974 #endif 975 976 static struct arm32_dma_range smdk2410_dma_ranges[1]; 977 978 bus_dma_tag_t 979 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 980 { 981 extern paddr_t physical_start, physical_end; 982 struct arm32_bus_dma_tag *dmat; 983 984 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 985 smdk2410_dma_ranges[0].dr_busbase = physical_start; 986 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 987 988 #if 1 989 dmat = dma_tag_template; 990 #else 991 dmat = malloc(sizeof *dmat, M_DEVBUF, M_WAITOK); 992 *dmat = *dma_tag_template; 993 #endif 994 995 dmat->_ranges = smdk2410_dma_ranges; 996 dmat->_nranges = 1; 997 998 return dmat; 999 } 1000
Indexes created Mon Oct 20 20:10:13 GMT 2025