1 /* $NetBSD: viper_machdep.c,v 1.11 2008/11/11 06:46:42 dyoung 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 1.11 2008/11/11 06:46:42 dyoung 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 "md.h" 123 #include "lcd.h" 124 125 #include <sys/param.h> 126 #include <sys/device.h> 127 #include <sys/systm.h> 128 #include <sys/kernel.h> 129 #include <sys/exec.h> 130 #include <sys/proc.h> 131 #include <sys/msgbuf.h> 132 #include <sys/reboot.h> 133 #include <sys/termios.h> 134 #include <sys/ksyms.h> 135 136 #include <uvm/uvm_extern.h> 137 138 #include <sys/conf.h> 139 #include <dev/cons.h> 140 #include <dev/md.h> 141 #include <dev/ic/smc91cxxreg.h> 142 143 #include <machine/db_machdep.h> 144 #include <ddb/db_sym.h> 145 #include <ddb/db_extern.h> 146 #ifdef KGDB 147 #include <sys/kgdb.h> 148 #endif 149 150 #include <machine/bootconfig.h> 151 #include <machine/bus.h> 152 #include <machine/cpu.h> 153 #include <machine/frame.h> 154 #include <arm/undefined.h> 155 156 #include <arm/arm32/machdep.h> 157 158 #include <arm/xscale/pxa2x0reg.h> 159 #include <arm/xscale/pxa2x0var.h> 160 #include <arm/xscale/pxa2x0_gpio.h> 161 #include <arm/sa11x0/sa1111_reg.h> 162 #include <evbarm/viper/viper_reg.h> 163 164 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 165 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 166 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 167 168 /* 169 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 170 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 171 */ 172 #define KERNEL_VM_SIZE 0x0C000000 173 174 175 /* 176 * Address to call from cpu_reset() to reset the machine. 177 * This is machine architecture dependant as it varies depending 178 * on where the ROM appears when you turn the MMU off. 179 */ 180 181 u_int cpu_reset_address = 0; 182 183 /* Define various stack sizes in pages */ 184 #define IRQ_STACK_SIZE 1 185 #define ABT_STACK_SIZE 1 186 #define UND_STACK_SIZE 1 187 188 BootConfig bootconfig; /* Boot config storage */ 189 char *boot_args = NULL; 190 char *boot_file = NULL; 191 192 vm_offset_t physical_start; 193 vm_offset_t physical_freestart; 194 vm_offset_t physical_freeend; 195 vm_offset_t physical_end; 196 u_int free_pages; 197 vm_offset_t pagetables_start; 198 int physmem = 0; 199 200 /*int debug_flags;*/ 201 #ifndef PMAP_STATIC_L1S 202 int max_processes = 64; /* Default number */ 203 #endif /* !PMAP_STATIC_L1S */ 204 205 /* Physical and virtual addresses for some global pages */ 206 pv_addr_t irqstack; 207 pv_addr_t undstack; 208 pv_addr_t abtstack; 209 pv_addr_t kernelstack; 210 pv_addr_t minidataclean; 211 212 vm_offset_t msgbufphys; 213 214 extern u_int data_abort_handler_address; 215 extern u_int prefetch_abort_handler_address; 216 extern u_int undefined_handler_address; 217 218 #ifdef PMAP_DEBUG 219 extern int pmap_debug_level; 220 #endif 221 222 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 223 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 224 #define KERNEL_PT_KERNEL_NUM 4 225 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 226 /* Page tables for mapping kernel VM */ 227 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 228 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 229 230 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 231 232 struct user *proc0paddr; 233 234 /* Prototypes */ 235 236 #if 0 237 void process_kernel_args(char *); 238 #endif 239 240 void consinit(void); 241 void kgdb_port_init(void); 242 void change_clock(uint32_t v); 243 244 bs_protos(bs_notimpl); 245 246 #include "com.h" 247 #if NCOM > 0 248 #include <dev/ic/comreg.h> 249 #include <dev/ic/comvar.h> 250 #endif 251 252 #ifndef CONSPEED 253 #define CONSPEED B115200 /* What RedBoot uses */ 254 #endif 255 #ifndef CONMODE 256 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 257 #endif 258 259 int comcnspeed = CONSPEED; 260 int comcnmode = CONMODE; 261 262 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 263 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 264 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 265 266 { -1 } 267 }; 268 static struct pxa2x0_gpioconf *viper_gpioconf[] = { 269 pxa25x_com_btuart_gpioconf, 270 pxa25x_com_ffuart_gpioconf, 271 pxa25x_com_stuart_gpioconf, 272 boarddep_gpioconf, 273 NULL 274 }; 275 276 /* 277 * void cpu_reboot(int howto, char *bootstr) 278 * 279 * Reboots the system 280 * 281 * Deal with any syncing, unmounting, dumping and shutdown hooks, 282 * then reset the CPU. 283 */ 284 void 285 cpu_reboot(int howto, char *bootstr) 286 { 287 #ifdef DIAGNOSTIC 288 /* info */ 289 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 290 #endif 291 292 /* 293 * If we are still cold then hit the air brakes 294 * and crash to earth fast 295 */ 296 if (cold) { 297 doshutdownhooks(); 298 pmf_system_shutdown(boothowto); 299 printf("The operating system has halted.\n"); 300 printf("Please press any key to reboot.\n\n"); 301 cngetc(); 302 printf("rebooting...\n"); 303 cpu_reset(); 304 /*NOTREACHED*/ 305 } 306 307 /* Disable console buffering */ 308 /* cnpollc(1);*/ 309 310 /* 311 * If RB_NOSYNC was not specified sync the discs. 312 * Note: Unless cold is set to 1 here, syslogd will die during the 313 * unmount. It looks like syslogd is getting woken up only to find 314 * that it cannot page part of the binary in as the filesystem has 315 * been unmounted. 316 */ 317 if (!(howto & RB_NOSYNC)) 318 bootsync(); 319 320 /* Say NO to interrupts */ 321 splhigh(); 322 323 /* Do a dump if requested. */ 324 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 325 dumpsys(); 326 327 /* Run any shutdown hooks */ 328 doshutdownhooks(); 329 330 pmf_system_shutdown(boothowto); 331 332 /* Make sure IRQ's are disabled */ 333 IRQdisable; 334 335 if (howto & RB_HALT) { 336 printf("The operating system has halted.\n"); 337 printf("Please press any key to reboot.\n\n"); 338 cngetc(); 339 } 340 341 printf("rebooting...\n"); 342 cpu_reset(); 343 /*NOTREACHED*/ 344 } 345 346 /* 347 * Static device mappings. These peripheral registers are mapped at 348 * fixed virtual addresses very early in viper_start() so that we 349 * can use them while booting the kernel, and stay at the same address 350 * throughout whole kernel's life time. 351 * 352 * We use this table twice; once with bootstrap page table, and once 353 * with kernel's page table which we build up in initarm(). 354 */ 355 356 static const struct pmap_devmap viper_devmap[] = { 357 { 358 VIPER_GPIO_VBASE, 359 PXA2X0_GPIO_BASE, 360 L1_S_SIZE, 361 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 362 }, 363 { 364 VIPER_CLKMAN_VBASE, 365 PXA2X0_CLKMAN_BASE, 366 L1_S_SIZE, 367 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 368 }, 369 { 370 VIPER_INTCTL_VBASE, 371 PXA2X0_INTCTL_BASE, 372 L1_S_SIZE, 373 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 374 }, 375 { 376 VIPER_FFUART_VBASE, 377 PXA2X0_FFUART_BASE, 378 L1_S_SIZE, 379 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 380 }, 381 { 382 VIPER_BTUART_VBASE, 383 PXA2X0_BTUART_BASE, 384 L1_S_SIZE, 385 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 386 }, 387 388 {0, 0, 0, 0,} 389 }; 390 391 #ifndef MEMSTART 392 #define MEMSTART 0xa0000000 393 #endif 394 #ifndef MEMSIZE 395 #define MEMSIZE 0x4000000 396 #endif 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 u_int 412 initarm(void *arg) 413 { 414 extern vaddr_t xscale_cache_clean_addr; 415 int loop; 416 int loop1; 417 u_int l1pagetable; 418 #ifdef DIAGNOSTIC 419 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 420 #endif 421 422 /* Register devmap for devices we mapped in start */ 423 pmap_devmap_register(viper_devmap); 424 425 /* start 32.768 kHz OSC */ 426 ioreg_write(VIPER_CLKMAN_VBASE + 0x08, 2); 427 /* Get ready for splfoo() */ 428 pxa2x0_intr_bootstrap(VIPER_INTCTL_VBASE); 429 430 /* 431 * Heads up ... Setup the CPU / MMU / TLB functions 432 */ 433 if (set_cpufuncs()) 434 panic("cpu not recognized!"); 435 436 #if 0 437 /* Calibrate the delay loop. */ 438 #endif 439 440 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 441 pxa2x0_gpio_bootstrap(VIPER_GPIO_VBASE); 442 pxa2x0_gpio_config(viper_gpioconf); 443 444 /* turn on clock to UART block. 445 XXX: this should not be done here. */ 446 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 447 ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN)); 448 449 consinit(); 450 #ifdef KGDB 451 kgdb_port_init(); 452 #endif 453 /* Talk to the user */ 454 printf("\nNetBSD/evbarm (viper) booting ...\n"); 455 456 #if 0 457 /* 458 * Examine the boot args string for options we need to know about 459 * now. 460 */ 461 process_kernel_args((char *)nwbootinfo.bt_args); 462 #endif 463 464 printf("initarm: Configuring system ...\n"); 465 466 /* Fake bootconfig structure for the benefit of pmap.c */ 467 /* XXX must make the memory description h/w independent */ 468 bootconfig.dramblocks = 1; 469 bootconfig.dram[0].address = MEMSTART; 470 bootconfig.dram[0].pages = MEMSIZE / PAGE_SIZE; 471 472 /* 473 * Set up the variables that define the availablilty of 474 * physical memory. For now, we're going to set 475 * physical_freestart to 0xa0200000 (where the kernel 476 * was loaded), and allocate the memory we need downwards. 477 * If we get too close to the page tables that RedBoot 478 * set up, we will panic. We will update physical_freestart 479 * and physical_freeend later to reflect what pmap_bootstrap() 480 * wants to see. 481 * 482 * XXX pmap_bootstrap() needs an enema. 483 * (now that would be truly hardcore XXX) 484 */ 485 physical_start = bootconfig.dram[0].address; 486 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 487 488 physical_freestart = 0xa0009000UL; 489 physical_freeend = 0xa0200000UL; 490 491 physmem = (physical_end - physical_start) / PAGE_SIZE; 492 493 #ifdef VERBOSE_INIT_ARM 494 /* Tell the user about the memory */ 495 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 496 physical_start, physical_end - 1); 497 #endif 498 499 /* 500 * Okay, the kernel starts 2MB in from the bottom of physical 501 * memory. We are going to allocate our bootstrap pages downwards 502 * from there. 503 * 504 * We need to allocate some fixed page tables to get the kernel 505 * going. We allocate one page directory and a number of page 506 * tables and store the physical addresses in the kernel_pt_table 507 * array. 508 * 509 * The kernel page directory must be on a 16K boundary. The page 510 * tables must be on 4K boundaries. What we do is allocate the 511 * page directory on the first 16K boundary that we encounter, and 512 * the page tables on 4K boundaries otherwise. Since we allocate 513 * at least 3 L2 page tables, we are guaranteed to encounter at 514 * least one 16K aligned region. 515 */ 516 517 #ifdef VERBOSE_INIT_ARM 518 printf("Allocating page tables\n"); 519 #endif 520 521 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 522 523 #ifdef VERBOSE_INIT_ARM 524 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 525 physical_freestart, free_pages, free_pages); 526 #endif 527 528 /* Define a macro to simplify memory allocation */ 529 #define valloc_pages(var, np) \ 530 alloc_pages((var).pv_pa, (np)); \ 531 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 532 533 #define alloc_pages(var, np) \ 534 physical_freeend -= ((np) * PAGE_SIZE); \ 535 if (physical_freeend < physical_freestart) \ 536 panic("initarm: out of memory"); \ 537 (var) = physical_freeend; \ 538 free_pages -= (np); \ 539 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 540 541 loop1 = 0; 542 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 543 /* Are we 16KB aligned for an L1 ? */ 544 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 545 && kernel_l1pt.pv_pa == 0) { 546 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 547 } else { 548 valloc_pages(kernel_pt_table[loop1], 549 L2_TABLE_SIZE / PAGE_SIZE); 550 ++loop1; 551 } 552 } 553 554 /* This should never be able to happen but better confirm that. */ 555 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 556 panic("initarm: Failed to align the kernel page directory"); 557 558 /* 559 * Allocate a page for the system page mapped to V0x00000000 560 * This page will just contain the system vectors and can be 561 * shared by all processes. 562 */ 563 alloc_pages(systempage.pv_pa, 1); 564 565 /* Allocate stacks for all modes */ 566 valloc_pages(irqstack, IRQ_STACK_SIZE); 567 valloc_pages(abtstack, ABT_STACK_SIZE); 568 valloc_pages(undstack, UND_STACK_SIZE); 569 valloc_pages(kernelstack, UPAGES); 570 571 /* Allocate enough pages for cleaning the Mini-Data cache. */ 572 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 573 valloc_pages(minidataclean, 1); 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 577 irqstack.pv_va); 578 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 579 abtstack.pv_va); 580 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 581 undstack.pv_va); 582 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 583 kernelstack.pv_va); 584 #endif 585 586 /* 587 * XXX Defer this to later so that we can reclaim the memory 588 * XXX used by the RedBoot page tables. 589 */ 590 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 591 592 /* 593 * Ok we have allocated physical pages for the primary kernel 594 * page tables 595 */ 596 597 #ifdef VERBOSE_INIT_ARM 598 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 599 #endif 600 601 /* 602 * Now we start construction of the L1 page table 603 * We start by mapping the L2 page tables into the L1. 604 * This means that we can replace L1 mappings later on if necessary 605 */ 606 l1pagetable = kernel_l1pt.pv_pa; 607 608 /* Map the L2 pages tables in the L1 page table */ 609 pmap_link_l2pt(l1pagetable, 0x00000000, 610 &kernel_pt_table[KERNEL_PT_SYS]); 611 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 612 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 613 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 614 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 615 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 616 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 617 618 /* update the top of the kernel VM */ 619 pmap_curmaxkvaddr = 620 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 621 622 #ifdef VERBOSE_INIT_ARM 623 printf("Mapping kernel\n"); 624 #endif 625 626 /* Now we fill in the L2 pagetable for the kernel static code/data */ 627 { 628 extern char etext[], _end[]; 629 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 630 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 631 u_int logical; 632 633 textsize = (textsize + PGOFSET) & ~PGOFSET; 634 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 635 636 logical = 0x00200000; /* offset of kernel in RAM */ 637 638 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 639 physical_start + logical, textsize, 640 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 642 physical_start + logical, totalsize - textsize, 643 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 644 } 645 646 #ifdef VERBOSE_INIT_ARM 647 printf("Constructing L2 page tables\n"); 648 #endif 649 650 /* Map the stack pages */ 651 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 652 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 653 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 654 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 656 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 657 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 658 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 659 660 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 661 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 662 663 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 664 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 665 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 666 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 667 } 668 669 /* Map the Mini-Data cache clean area. */ 670 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 671 minidataclean.pv_pa); 672 673 /* Map the vector page. */ 674 #if 1 675 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 676 * cache-clean code there. */ 677 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 678 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 679 #else 680 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 681 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 #endif 683 684 /* 685 * map integrated peripherals at same address in l1pagetable 686 * so that we can continue to use console. 687 */ 688 pmap_devmap_bootstrap(l1pagetable, viper_devmap); 689 690 /* 691 * Give the XScale global cache clean code an appropriately 692 * sized chunk of unmapped VA space starting at 0xff000000 693 * (our device mappings end before this address). 694 */ 695 xscale_cache_clean_addr = 0xff000000U; 696 697 /* 698 * Now we have the real page tables in place so we can switch to them. 699 * Once this is done we will be running with the REAL kernel page 700 * tables. 701 */ 702 703 /* 704 * Update the physical_freestart/physical_freeend/free_pages 705 * variables. 706 */ 707 { 708 extern char _end[]; 709 710 physical_freestart = physical_start + 711 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 712 KERNEL_BASE); 713 physical_freeend = physical_end; 714 free_pages = 715 (physical_freeend - physical_freestart) / PAGE_SIZE; 716 } 717 718 /* Switch tables */ 719 #ifdef VERBOSE_INIT_ARM 720 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 721 physical_freestart, free_pages, free_pages); 722 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 723 #endif 724 725 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 726 setttb(kernel_l1pt.pv_pa); 727 cpu_tlb_flushID(); 728 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 729 730 /* 731 * Moved from cpu_startup() as data_abort_handler() references 732 * this during uvm init 733 */ 734 proc0paddr = (struct user *)kernelstack.pv_va; 735 lwp0.l_addr = proc0paddr; 736 737 #ifdef VERBOSE_INIT_ARM 738 printf("bootstrap done.\n"); 739 #endif 740 741 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 742 743 /* 744 * Pages were allocated during the secondary bootstrap for the 745 * stacks for different CPU modes. 746 * We must now set the r13 registers in the different CPU modes to 747 * point to these stacks. 748 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 749 * of the stack memory. 750 */ 751 printf("init subsystems: stacks "); 752 753 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 754 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 755 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 756 757 /* 758 * Well we should set a data abort handler. 759 * Once things get going this will change as we will need a proper 760 * handler. 761 * Until then we will use a handler that just panics but tells us 762 * why. 763 * Initialisation of the vectors will just panic on a data abort. 764 * This just fills in a slightly better one. 765 */ 766 printf("vectors "); 767 data_abort_handler_address = (u_int)data_abort_handler; 768 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 769 undefined_handler_address = (u_int)undefinedinstruction_bounce; 770 771 /* Initialise the undefined instruction handlers */ 772 printf("undefined "); 773 undefined_init(); 774 775 /* Load memory into UVM. */ 776 printf("page "); 777 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 778 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 779 atop(physical_freestart), atop(physical_freeend), 780 VM_FREELIST_DEFAULT); 781 782 /* Boot strap pmap telling it where the kernel page table is */ 783 printf("pmap "); 784 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 785 786 #ifdef __HAVE_MEMORY_DISK__ 787 md_root_setconf(memory_disk, sizeof memory_disk); 788 #endif 789 790 #ifdef KGDB 791 if (boothowto & RB_KDB) { 792 kgdb_debug_init = 1; 793 kgdb_connect(1); 794 } 795 #endif 796 797 #ifdef DDB 798 db_machine_init(); 799 800 /* Firmware doesn't load symbols. */ 801 ddb_init(0, NULL, NULL); 802 803 if (boothowto & RB_KDB) 804 Debugger(); 805 #endif 806 807 /* We return the new stack pointer address */ 808 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 809 } 810 811 #if 0 812 void 813 process_kernel_args(char *args) 814 { 815 816 boothowto = 0; 817 818 /* Make a local copy of the bootargs */ 819 strncpy(bootargs, args, MAX_BOOT_STRING); 820 821 args = bootargs; 822 boot_file = bootargs; 823 824 /* Skip the kernel image filename */ 825 while (*args != ' ' && *args != 0) 826 ++args; 827 828 if (*args != 0) 829 *args++ = 0; 830 831 while (*args == ' ') 832 ++args; 833 834 boot_args = args; 835 836 printf("bootfile: %s\n", boot_file); 837 printf("bootargs: %s\n", boot_args); 838 839 parse_mi_bootargs(boot_args); 840 } 841 #endif 842 843 #ifdef KGDB 844 #ifndef KGDB_DEVNAME 845 #define KGDB_DEVNAME "ffuart" 846 #endif 847 const char kgdb_devname[] = KGDB_DEVNAME; 848 849 #if (NCOM > 0) 850 #ifndef KGDB_DEVMODE 851 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 852 #endif 853 int comkgdbmode = KGDB_DEVMODE; 854 #endif /* NCOM */ 855 856 #endif /* KGDB */ 857 858 859 void 860 consinit(void) 861 { 862 static int consinit_called = 0; 863 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 864 #if 0 865 char *console = CONSDEVNAME; 866 #endif 867 868 if (consinit_called != 0) 869 return; 870 consinit_called = 1; 871 872 #if NCOM > 0 873 874 #ifdef FFUARTCONSOLE 875 #ifdef KGDB 876 if (0 == strcmp(kgdb_devname, "ffuart")) { 877 /* port is reserved for kgdb */ 878 } else 879 #endif 880 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 881 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 882 883 #if 0 884 /* XXX: can't call pxa2x0_clkman_config yet */ 885 pxa2x0_clkman_config(CKEN_FFUART, 1); 886 #else 887 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 888 ckenreg|CKEN_FFUART); 889 #endif 890 891 return; 892 } 893 894 #endif /* FFUARTCONSOLE */ 895 896 #ifdef BTUARTCONSOLE 897 #ifdef KGDB 898 if (0 == strcmp(kgdb_devname, "btuart")) { 899 /* port is reserved for kgdb */ 900 } else 901 #endif 902 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 903 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 904 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 905 ckenreg|CKEN_BTUART); 906 return; 907 } 908 #endif /* BTUARTCONSOLE */ 909 910 /* no console, guess we're flying blind */ 911 912 #endif /* NCOM */ 913 914 } 915 916 #ifdef KGDB 917 void 918 kgdb_port_init(void) 919 { 920 #if (NCOM > 0) && defined(COM_PXA2X0) 921 paddr_t paddr = 0; 922 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 923 924 if (0 == strcmp(kgdb_devname, "ffuart")) { 925 paddr = PXA2X0_FFUART_BASE; 926 ckenreg |= CKEN_FFUART; 927 } 928 else if (0 == strcmp(kgdb_devname, "btuart")) { 929 paddr = PXA2X0_BTUART_BASE; 930 ckenreg |= CKEN_BTUART; 931 } 932 933 if (paddr && 934 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 935 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 936 937 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 938 } 939 #endif 940 } 941 #endif 942