1 /* $NetBSD: viper_machdep.c,v 1.17 2010/11/28 08:23:24 hannken Exp $ */ 2 3 /* 4 * Startup routines for the Arcom Viper. Below you can trace the 5 * impressive lineage ;) 6 * 7 * Modified for the Viper by Antti Kantee <pooka@netbsd.org> 8 */ 9 10 /* 11 * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved. 12 * Written by Hiroyuki Bessho for Genetec Corporation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. The name of Genetec Corporation may not be used to endorse or 23 * promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 * 38 * Machine dependant functions for kernel setup for 39 * Intel DBPXA250 evaluation board (a.k.a. Lubbock). 40 * Based on iq80310_machhdep.c 41 */ 42 /* 43 * Copyright (c) 2001 Wasabi Systems, Inc. 44 * All rights reserved. 45 * 46 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 47 * 48 * Redistribution and use in source and binary forms, with or without 49 * modification, are permitted provided that the following conditions 50 * are met: 51 * 1. Redistributions of source code must retain the above copyright 52 * notice, this list of conditions and the following disclaimer. 53 * 2. Redistributions in binary form must reproduce the above copyright 54 * notice, this list of conditions and the following disclaimer in the 55 * documentation and/or other materials provided with the distribution. 56 * 3. All advertising materials mentioning features or use of this software 57 * must display the following acknowledgement: 58 * This product includes software developed for the NetBSD Project by 59 * Wasabi Systems, Inc. 60 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 61 * or promote products derived from this software without specific prior 62 * written permission. 63 * 64 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 66 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 67 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 68 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 69 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 70 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 71 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 72 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 73 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 74 * POSSIBILITY OF SUCH DAMAGE. 75 */ 76 77 /* 78 * Copyright (c) 1997,1998 Mark Brinicombe. 79 * Copyright (c) 1997,1998 Causality Limited. 80 * All rights reserved. 81 * 82 * Redistribution and use in source and binary forms, with or without 83 * modification, are permitted provided that the following conditions 84 * are met: 85 * 1. Redistributions of source code must retain the above copyright 86 * notice, this list of conditions and the following disclaimer. 87 * 2. Redistributions in binary form must reproduce the above copyright 88 * notice, this list of conditions and the following disclaimer in the 89 * documentation and/or other materials provided with the distribution. 90 * 3. All advertising materials mentioning features or use of this software 91 * must display the following acknowledgement: 92 * This product includes software developed by Mark Brinicombe 93 * for the NetBSD Project. 94 * 4. The name of the company nor the name of the author may be used to 95 * endorse or promote products derived from this software without specific 96 * prior written permission. 97 * 98 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 99 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 100 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 101 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 102 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 103 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 104 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 108 * SUCH DAMAGE. 109 * 110 * Machine dependant functions for kernel setup for Intel IQ80310 evaluation 111 * boards using RedBoot firmware. 112 */ 113 114 #include <sys/cdefs.h> 115 __KERNEL_RCSID(0, "$NetBSD: viper_machdep.c,v 1.17 2010/11/28 08:23:24 hannken Exp $"); 116 117 #include "opt_ddb.h" 118 #include "opt_kgdb.h" 119 #include "opt_pmap_debug.h" 120 #include "opt_md.h" 121 #include "opt_com.h" 122 #include "lcd.h" 123 124 #include <sys/param.h> 125 #include <sys/device.h> 126 #include <sys/systm.h> 127 #include <sys/kernel.h> 128 #include <sys/exec.h> 129 #include <sys/proc.h> 130 #include <sys/msgbuf.h> 131 #include <sys/reboot.h> 132 #include <sys/termios.h> 133 #include <sys/ksyms.h> 134 135 #include <uvm/uvm_extern.h> 136 137 #include <sys/conf.h> 138 #include <dev/cons.h> 139 #include <dev/md.h> 140 #include <dev/ic/smc91cxxreg.h> 141 142 #include <machine/db_machdep.h> 143 #include <ddb/db_sym.h> 144 #include <ddb/db_extern.h> 145 #ifdef KGDB 146 #include <sys/kgdb.h> 147 #endif 148 149 #include <machine/bootconfig.h> 150 #include <machine/bus.h> 151 #include <machine/cpu.h> 152 #include <machine/frame.h> 153 #include <arm/undefined.h> 154 155 #include <arm/arm32/machdep.h> 156 157 #include <arm/xscale/pxa2x0reg.h> 158 #include <arm/xscale/pxa2x0var.h> 159 #include <arm/xscale/pxa2x0_gpio.h> 160 #include <arm/sa11x0/sa1111_reg.h> 161 #include <evbarm/viper/viper_reg.h> 162 163 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 164 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 165 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 166 167 /* 168 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 169 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 170 */ 171 #define KERNEL_VM_SIZE 0x0C000000 172 173 174 /* 175 * Address to call from cpu_reset() to reset the machine. 176 * This is machine architecture dependant as it varies depending 177 * on where the ROM appears when you turn the MMU off. 178 */ 179 180 u_int cpu_reset_address = 0; 181 182 /* Define various stack sizes in pages */ 183 #define IRQ_STACK_SIZE 1 184 #define ABT_STACK_SIZE 1 185 #define UND_STACK_SIZE 1 186 187 BootConfig bootconfig; /* Boot config storage */ 188 char *boot_args = NULL; 189 char *boot_file = NULL; 190 191 vm_offset_t physical_start; 192 vm_offset_t physical_freestart; 193 vm_offset_t physical_freeend; 194 vm_offset_t physical_end; 195 u_int free_pages; 196 197 /*int debug_flags;*/ 198 #ifndef PMAP_STATIC_L1S 199 int max_processes = 64; /* Default number */ 200 #endif /* !PMAP_STATIC_L1S */ 201 202 /* Physical and virtual addresses for some global pages */ 203 pv_addr_t irqstack; 204 pv_addr_t undstack; 205 pv_addr_t abtstack; 206 pv_addr_t kernelstack; 207 pv_addr_t minidataclean; 208 209 vm_offset_t msgbufphys; 210 211 extern u_int data_abort_handler_address; 212 extern u_int prefetch_abort_handler_address; 213 extern u_int undefined_handler_address; 214 215 #ifdef PMAP_DEBUG 216 extern int pmap_debug_level; 217 #endif 218 219 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 220 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 221 #define KERNEL_PT_KERNEL_NUM 4 222 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 223 /* Page tables for mapping kernel VM */ 224 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 225 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 226 227 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 228 229 /* Prototypes */ 230 231 #if 0 232 void process_kernel_args(char *); 233 #endif 234 235 void consinit(void); 236 void kgdb_port_init(void); 237 void change_clock(uint32_t v); 238 239 bs_protos(bs_notimpl); 240 241 #include "com.h" 242 #if NCOM > 0 243 #include <dev/ic/comreg.h> 244 #include <dev/ic/comvar.h> 245 #endif 246 247 #ifndef CONSPEED 248 #define CONSPEED B115200 /* What RedBoot uses */ 249 #endif 250 #ifndef CONMODE 251 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 252 #endif 253 254 int comcnspeed = CONSPEED; 255 int comcnmode = CONMODE; 256 257 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 258 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 259 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 260 261 { -1 } 262 }; 263 static struct pxa2x0_gpioconf *viper_gpioconf[] = { 264 pxa25x_com_btuart_gpioconf, 265 pxa25x_com_ffuart_gpioconf, 266 pxa25x_com_stuart_gpioconf, 267 boarddep_gpioconf, 268 NULL 269 }; 270 271 /* 272 * void cpu_reboot(int howto, char *bootstr) 273 * 274 * Reboots the system 275 * 276 * Deal with any syncing, unmounting, dumping and shutdown hooks, 277 * then reset the CPU. 278 */ 279 void 280 cpu_reboot(int howto, char *bootstr) 281 { 282 #ifdef DIAGNOSTIC 283 /* info */ 284 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 285 #endif 286 287 /* 288 * If we are still cold then hit the air brakes 289 * and crash to earth fast 290 */ 291 if (cold) { 292 doshutdownhooks(); 293 pmf_system_shutdown(boothowto); 294 printf("The operating system has halted.\n"); 295 printf("Please press any key to reboot.\n\n"); 296 cngetc(); 297 printf("rebooting...\n"); 298 cpu_reset(); 299 /*NOTREACHED*/ 300 } 301 302 /* Disable console buffering */ 303 /* cnpollc(1);*/ 304 305 /* 306 * If RB_NOSYNC was not specified sync the discs. 307 * Note: Unless cold is set to 1 here, syslogd will die during the 308 * unmount. It looks like syslogd is getting woken up only to find 309 * that it cannot page part of the binary in as the filesystem has 310 * been unmounted. 311 */ 312 if (!(howto & RB_NOSYNC)) 313 bootsync(); 314 315 /* Say NO to interrupts */ 316 splhigh(); 317 318 /* Do a dump if requested. */ 319 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 320 dumpsys(); 321 322 /* Run any shutdown hooks */ 323 doshutdownhooks(); 324 325 pmf_system_shutdown(boothowto); 326 327 /* Make sure IRQ's are disabled */ 328 IRQdisable; 329 330 if (howto & RB_HALT) { 331 printf("The operating system has halted.\n"); 332 printf("Please press any key to reboot.\n\n"); 333 cngetc(); 334 } 335 336 printf("rebooting...\n"); 337 cpu_reset(); 338 /*NOTREACHED*/ 339 } 340 341 /* 342 * Static device mappings. These peripheral registers are mapped at 343 * fixed virtual addresses very early in viper_start() so that we 344 * can use them while booting the kernel, and stay at the same address 345 * throughout whole kernel's life time. 346 * 347 * We use this table twice; once with bootstrap page table, and once 348 * with kernel's page table which we build up in initarm(). 349 */ 350 351 static const struct pmap_devmap viper_devmap[] = { 352 { 353 VIPER_GPIO_VBASE, 354 PXA2X0_GPIO_BASE, 355 L1_S_SIZE, 356 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 357 }, 358 { 359 VIPER_CLKMAN_VBASE, 360 PXA2X0_CLKMAN_BASE, 361 L1_S_SIZE, 362 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 363 }, 364 { 365 VIPER_INTCTL_VBASE, 366 PXA2X0_INTCTL_BASE, 367 L1_S_SIZE, 368 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 369 }, 370 { 371 VIPER_FFUART_VBASE, 372 PXA2X0_FFUART_BASE, 373 L1_S_SIZE, 374 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 375 }, 376 { 377 VIPER_BTUART_VBASE, 378 PXA2X0_BTUART_BASE, 379 L1_S_SIZE, 380 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 381 }, 382 383 {0, 0, 0, 0,} 384 }; 385 386 #ifndef MEMSTART 387 #define MEMSTART 0xa0000000 388 #endif 389 #ifndef MEMSIZE 390 #define MEMSIZE 0x4000000 391 #endif 392 393 /* 394 * u_int initarm(...) 395 * 396 * Initial entry point on startup. This gets called before main() is 397 * entered. 398 * It should be responsible for setting up everything that must be 399 * in place when main is called. 400 * This includes 401 * Taking a copy of the boot configuration structure. 402 * Initialising the physical console so characters can be printed. 403 * Setting up page tables for the kernel 404 * Relocating the kernel to the bottom of physical memory 405 */ 406 u_int 407 initarm(void *arg) 408 { 409 extern vaddr_t xscale_cache_clean_addr; 410 int loop; 411 int loop1; 412 u_int l1pagetable; 413 #ifdef DIAGNOSTIC 414 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 415 #endif 416 417 /* Register devmap for devices we mapped in start */ 418 pmap_devmap_register(viper_devmap); 419 420 /* start 32.768 kHz OSC */ 421 ioreg_write(VIPER_CLKMAN_VBASE + 0x08, 2); 422 /* Get ready for splfoo() */ 423 pxa2x0_intr_bootstrap(VIPER_INTCTL_VBASE); 424 425 /* 426 * Heads up ... Setup the CPU / MMU / TLB functions 427 */ 428 if (set_cpufuncs()) 429 panic("cpu not recognized!"); 430 431 #if 0 432 /* Calibrate the delay loop. */ 433 #endif 434 435 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 436 pxa2x0_gpio_bootstrap(VIPER_GPIO_VBASE); 437 pxa2x0_gpio_config(viper_gpioconf); 438 439 /* turn on clock to UART block. 440 XXX: this should not be done here. */ 441 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 442 ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN)); 443 444 consinit(); 445 #ifdef KGDB 446 kgdb_port_init(); 447 #endif 448 /* Talk to the user */ 449 printf("\nNetBSD/evbarm (viper) booting ...\n"); 450 451 #if 0 452 /* 453 * Examine the boot args string for options we need to know about 454 * now. 455 */ 456 process_kernel_args((char *)nwbootinfo.bt_args); 457 #endif 458 459 printf("initarm: Configuring system ...\n"); 460 461 /* Fake bootconfig structure for the benefit of pmap.c */ 462 /* XXX must make the memory description h/w independent */ 463 bootconfig.dramblocks = 1; 464 bootconfig.dram[0].address = MEMSTART; 465 bootconfig.dram[0].pages = MEMSIZE / PAGE_SIZE; 466 467 /* 468 * Set up the variables that define the availablilty of 469 * physical memory. For now, we're going to set 470 * physical_freestart to 0xa0200000 (where the kernel 471 * was loaded), and allocate the memory we need downwards. 472 * If we get too close to the page tables that RedBoot 473 * set up, we will panic. We will update physical_freestart 474 * and physical_freeend later to reflect what pmap_bootstrap() 475 * wants to see. 476 * 477 * XXX pmap_bootstrap() needs an enema. 478 * (now that would be truly hardcore XXX) 479 */ 480 physical_start = bootconfig.dram[0].address; 481 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 482 483 physical_freestart = 0xa0009000UL; 484 physical_freeend = 0xa0200000UL; 485 486 physmem = (physical_end - physical_start) / PAGE_SIZE; 487 488 #ifdef VERBOSE_INIT_ARM 489 /* Tell the user about the memory */ 490 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 491 physical_start, physical_end - 1); 492 #endif 493 494 /* 495 * Okay, the kernel starts 2MB in from the bottom of physical 496 * memory. We are going to allocate our bootstrap pages downwards 497 * from there. 498 * 499 * We need to allocate some fixed page tables to get the kernel 500 * going. We allocate one page directory and a number of page 501 * tables and store the physical addresses in the kernel_pt_table 502 * array. 503 * 504 * The kernel page directory must be on a 16K boundary. The page 505 * tables must be on 4K boundaries. What we do is allocate the 506 * page directory on the first 16K boundary that we encounter, and 507 * the page tables on 4K boundaries otherwise. Since we allocate 508 * at least 3 L2 page tables, we are guaranteed to encounter at 509 * least one 16K aligned region. 510 */ 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("Allocating page tables\n"); 514 #endif 515 516 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 517 518 #ifdef VERBOSE_INIT_ARM 519 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 520 physical_freestart, free_pages, free_pages); 521 #endif 522 523 /* Define a macro to simplify memory allocation */ 524 #define valloc_pages(var, np) \ 525 alloc_pages((var).pv_pa, (np)); \ 526 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 527 528 #define alloc_pages(var, np) \ 529 physical_freeend -= ((np) * PAGE_SIZE); \ 530 if (physical_freeend < physical_freestart) \ 531 panic("initarm: out of memory"); \ 532 (var) = physical_freeend; \ 533 free_pages -= (np); \ 534 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 535 536 loop1 = 0; 537 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 538 /* Are we 16KB aligned for an L1 ? */ 539 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 540 && kernel_l1pt.pv_pa == 0) { 541 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 542 } else { 543 valloc_pages(kernel_pt_table[loop1], 544 L2_TABLE_SIZE / PAGE_SIZE); 545 ++loop1; 546 } 547 } 548 549 /* This should never be able to happen but better confirm that. */ 550 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 551 panic("initarm: Failed to align the kernel page directory"); 552 553 /* 554 * Allocate a page for the system page mapped to V0x00000000 555 * This page will just contain the system vectors and can be 556 * shared by all processes. 557 */ 558 alloc_pages(systempage.pv_pa, 1); 559 560 /* Allocate stacks for all modes */ 561 valloc_pages(irqstack, IRQ_STACK_SIZE); 562 valloc_pages(abtstack, ABT_STACK_SIZE); 563 valloc_pages(undstack, UND_STACK_SIZE); 564 valloc_pages(kernelstack, UPAGES); 565 566 /* Allocate enough pages for cleaning the Mini-Data cache. */ 567 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 568 valloc_pages(minidataclean, 1); 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 572 irqstack.pv_va); 573 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 574 abtstack.pv_va); 575 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 576 undstack.pv_va); 577 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 578 kernelstack.pv_va); 579 #endif 580 581 /* 582 * XXX Defer this to later so that we can reclaim the memory 583 * XXX used by the RedBoot page tables. 584 */ 585 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 586 587 /* 588 * Ok we have allocated physical pages for the primary kernel 589 * page tables 590 */ 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 594 #endif 595 596 /* 597 * Now we start construction of the L1 page table 598 * We start by mapping the L2 page tables into the L1. 599 * This means that we can replace L1 mappings later on if necessary 600 */ 601 l1pagetable = kernel_l1pt.pv_pa; 602 603 /* Map the L2 pages tables in the L1 page table */ 604 pmap_link_l2pt(l1pagetable, 0x00000000, 605 &kernel_pt_table[KERNEL_PT_SYS]); 606 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 607 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 608 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 609 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 610 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 611 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 612 613 /* update the top of the kernel VM */ 614 pmap_curmaxkvaddr = 615 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 616 617 #ifdef VERBOSE_INIT_ARM 618 printf("Mapping kernel\n"); 619 #endif 620 621 /* Now we fill in the L2 pagetable for the kernel static code/data */ 622 { 623 extern char etext[], _end[]; 624 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 625 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 626 u_int logical; 627 628 textsize = (textsize + PGOFSET) & ~PGOFSET; 629 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 630 631 logical = 0x00200000; /* offset of kernel in RAM */ 632 633 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 634 physical_start + logical, textsize, 635 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 636 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 637 physical_start + logical, totalsize - textsize, 638 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 } 640 641 #ifdef VERBOSE_INIT_ARM 642 printf("Constructing L2 page tables\n"); 643 #endif 644 645 /* Map the stack pages */ 646 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 647 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 648 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 649 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 650 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 651 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 652 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 653 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 654 655 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 656 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 657 658 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 659 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 660 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 661 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 662 } 663 664 /* Map the Mini-Data cache clean area. */ 665 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 666 minidataclean.pv_pa); 667 668 /* Map the vector page. */ 669 #if 1 670 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 671 * cache-clean code there. */ 672 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 674 #else 675 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 676 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 677 #endif 678 679 /* 680 * map integrated peripherals at same address in l1pagetable 681 * so that we can continue to use console. 682 */ 683 pmap_devmap_bootstrap(l1pagetable, viper_devmap); 684 685 /* 686 * Give the XScale global cache clean code an appropriately 687 * sized chunk of unmapped VA space starting at 0xff000000 688 * (our device mappings end before this address). 689 */ 690 xscale_cache_clean_addr = 0xff000000U; 691 692 /* 693 * Now we have the real page tables in place so we can switch to them. 694 * Once this is done we will be running with the REAL kernel page 695 * tables. 696 */ 697 698 /* 699 * Update the physical_freestart/physical_freeend/free_pages 700 * variables. 701 */ 702 { 703 extern char _end[]; 704 705 physical_freestart = physical_start + 706 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 707 KERNEL_BASE); 708 physical_freeend = physical_end; 709 free_pages = 710 (physical_freeend - physical_freestart) / PAGE_SIZE; 711 } 712 713 /* Switch tables */ 714 #ifdef VERBOSE_INIT_ARM 715 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 716 physical_freestart, free_pages, free_pages); 717 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 718 #endif 719 720 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 721 cpu_setttb(kernel_l1pt.pv_pa); 722 cpu_tlb_flushID(); 723 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 724 725 /* 726 * Moved from cpu_startup() as data_abort_handler() references 727 * this during uvm init 728 */ 729 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 730 731 #ifdef VERBOSE_INIT_ARM 732 printf("bootstrap done.\n"); 733 #endif 734 735 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 736 737 /* 738 * Pages were allocated during the secondary bootstrap for the 739 * stacks for different CPU modes. 740 * We must now set the r13 registers in the different CPU modes to 741 * point to these stacks. 742 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 743 * of the stack memory. 744 */ 745 printf("init subsystems: stacks "); 746 747 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 748 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 749 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 750 751 /* 752 * Well we should set a data abort handler. 753 * Once things get going this will change as we will need a proper 754 * handler. 755 * Until then we will use a handler that just panics but tells us 756 * why. 757 * Initialisation of the vectors will just panic on a data abort. 758 * This just fills in a slightly better one. 759 */ 760 printf("vectors "); 761 data_abort_handler_address = (u_int)data_abort_handler; 762 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 763 undefined_handler_address = (u_int)undefinedinstruction_bounce; 764 765 /* Initialise the undefined instruction handlers */ 766 printf("undefined "); 767 undefined_init(); 768 769 /* Load memory into UVM. */ 770 printf("page "); 771 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 772 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 773 atop(physical_freestart), atop(physical_freeend), 774 VM_FREELIST_DEFAULT); 775 776 /* Boot strap pmap telling it where the kernel page table is */ 777 printf("pmap "); 778 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 779 780 #ifdef __HAVE_MEMORY_DISK__ 781 md_root_setconf(memory_disk, sizeof memory_disk); 782 #endif 783 784 #ifdef KGDB 785 if (boothowto & RB_KDB) { 786 kgdb_debug_init = 1; 787 kgdb_connect(1); 788 } 789 #endif 790 791 #ifdef DDB 792 db_machine_init(); 793 794 /* Firmware doesn't load symbols. */ 795 ddb_init(0, NULL, NULL); 796 797 if (boothowto & RB_KDB) 798 Debugger(); 799 #endif 800 801 /* We return the new stack pointer address */ 802 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 803 } 804 805 #if 0 806 void 807 process_kernel_args(char *args) 808 { 809 810 boothowto = 0; 811 812 /* Make a local copy of the bootargs */ 813 strncpy(bootargs, args, MAX_BOOT_STRING); 814 815 args = bootargs; 816 boot_file = bootargs; 817 818 /* Skip the kernel image filename */ 819 while (*args != ' ' && *args != 0) 820 ++args; 821 822 if (*args != 0) 823 *args++ = 0; 824 825 while (*args == ' ') 826 ++args; 827 828 boot_args = args; 829 830 printf("bootfile: %s\n", boot_file); 831 printf("bootargs: %s\n", boot_args); 832 833 parse_mi_bootargs(boot_args); 834 } 835 #endif 836 837 #ifdef KGDB 838 #ifndef KGDB_DEVNAME 839 #define KGDB_DEVNAME "ffuart" 840 #endif 841 const char kgdb_devname[] = KGDB_DEVNAME; 842 843 #if (NCOM > 0) 844 #ifndef KGDB_DEVMODE 845 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 846 #endif 847 int comkgdbmode = KGDB_DEVMODE; 848 #endif /* NCOM */ 849 850 #endif /* KGDB */ 851 852 853 void 854 consinit(void) 855 { 856 static int consinit_called = 0; 857 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 858 #if 0 859 char *console = CONSDEVNAME; 860 #endif 861 862 if (consinit_called != 0) 863 return; 864 consinit_called = 1; 865 866 #if NCOM > 0 867 868 #ifdef FFUARTCONSOLE 869 #ifdef KGDB 870 if (0 == strcmp(kgdb_devname, "ffuart")) { 871 /* port is reserved for kgdb */ 872 } else 873 #endif 874 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 875 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 876 877 #if 0 878 /* XXX: can't call pxa2x0_clkman_config yet */ 879 pxa2x0_clkman_config(CKEN_FFUART, 1); 880 #else 881 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 882 ckenreg|CKEN_FFUART); 883 #endif 884 885 return; 886 } 887 888 #endif /* FFUARTCONSOLE */ 889 890 #ifdef BTUARTCONSOLE 891 #ifdef KGDB 892 if (0 == strcmp(kgdb_devname, "btuart")) { 893 /* port is reserved for kgdb */ 894 } else 895 #endif 896 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 897 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 898 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 899 ckenreg|CKEN_BTUART); 900 return; 901 } 902 #endif /* BTUARTCONSOLE */ 903 904 /* no console, guess we're flying blind */ 905 906 #endif /* NCOM */ 907 908 } 909 910 #ifdef KGDB 911 void 912 kgdb_port_init(void) 913 { 914 #if (NCOM > 0) && defined(COM_PXA2X0) 915 paddr_t paddr = 0; 916 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 917 918 if (0 == strcmp(kgdb_devname, "ffuart")) { 919 paddr = PXA2X0_FFUART_BASE; 920 ckenreg |= CKEN_FFUART; 921 } 922 else if (0 == strcmp(kgdb_devname, "btuart")) { 923 paddr = PXA2X0_BTUART_BASE; 924 ckenreg |= CKEN_BTUART; 925 } 926 927 if (paddr && 928 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 929 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 930 931 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 932 } 933 #endif 934 } 935 #endif 936