1 /* $NetBSD: viper_machdep.c,v 1.25 2016/12/22 14:47:56 cherry 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 dependent 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 dependent 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 1.25 2016/12/22 14:47:56 cherry 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 #include <sys/bus.h> 135 #include <sys/cpu.h> 136 137 #include <uvm/uvm_extern.h> 138 139 #include <sys/conf.h> 140 #include <dev/cons.h> 141 #include <dev/md.h> 142 #include <dev/ic/smc91cxxreg.h> 143 144 #include <machine/db_machdep.h> 145 #include <ddb/db_sym.h> 146 #include <ddb/db_extern.h> 147 #ifdef KGDB 148 #include <sys/kgdb.h> 149 #endif 150 151 #include <machine/bootconfig.h> 152 #include <arm/locore.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 BootConfig bootconfig; /* Boot config storage */ 174 char *boot_args = NULL; 175 char *boot_file = NULL; 176 177 vaddr_t physical_start; 178 vaddr_t physical_freestart; 179 vaddr_t physical_freeend; 180 vaddr_t physical_end; 181 u_int free_pages; 182 183 /*int debug_flags;*/ 184 #ifndef PMAP_STATIC_L1S 185 int max_processes = 64; /* Default number */ 186 #endif /* !PMAP_STATIC_L1S */ 187 188 /* Physical and virtual addresses for some global pages */ 189 pv_addr_t minidataclean; 190 191 paddr_t msgbufphys; 192 193 #ifdef PMAP_DEBUG 194 extern int pmap_debug_level; 195 #endif 196 197 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 198 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 199 #define KERNEL_PT_KERNEL_NUM 4 200 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 201 /* Page tables for mapping kernel VM */ 202 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 203 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 204 205 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 206 207 /* Prototypes */ 208 209 #if 0 210 void process_kernel_args(char *); 211 #endif 212 213 void consinit(void); 214 void kgdb_port_init(void); 215 void change_clock(uint32_t v); 216 217 bs_protos(bs_notimpl); 218 219 #include "com.h" 220 #if NCOM > 0 221 #include <dev/ic/comreg.h> 222 #include <dev/ic/comvar.h> 223 #endif 224 225 #ifndef CONSPEED 226 #define CONSPEED B115200 /* What RedBoot uses */ 227 #endif 228 #ifndef CONMODE 229 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 230 #endif 231 232 int comcnspeed = CONSPEED; 233 int comcnmode = CONMODE; 234 235 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 236 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 237 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 238 239 { -1 } 240 }; 241 static struct pxa2x0_gpioconf *viper_gpioconf[] = { 242 pxa25x_com_btuart_gpioconf, 243 pxa25x_com_ffuart_gpioconf, 244 pxa25x_com_stuart_gpioconf, 245 boarddep_gpioconf, 246 NULL 247 }; 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 #ifdef DIAGNOSTIC 261 /* info */ 262 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 263 #endif 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 } 279 280 /* Disable console buffering */ 281 /* cnpollc(1);*/ 282 283 /* 284 * If RB_NOSYNC was not specified sync the discs. 285 * Note: Unless cold is set to 1 here, syslogd will die during the 286 * unmount. It looks like syslogd is getting woken up only to find 287 * that it cannot page part of the binary in as the filesystem has 288 * been unmounted. 289 */ 290 if (!(howto & RB_NOSYNC)) 291 bootsync(); 292 293 /* Say NO to interrupts */ 294 splhigh(); 295 296 /* Do a dump if requested. */ 297 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 298 dumpsys(); 299 300 /* Run any shutdown hooks */ 301 doshutdownhooks(); 302 303 pmf_system_shutdown(boothowto); 304 305 /* Make sure IRQ's are disabled */ 306 IRQdisable; 307 308 if (howto & RB_HALT) { 309 printf("The operating system has halted.\n"); 310 printf("Please press any key to reboot.\n\n"); 311 cngetc(); 312 } 313 314 printf("rebooting...\n"); 315 cpu_reset(); 316 /*NOTREACHED*/ 317 } 318 319 /* 320 * Static device mappings. These peripheral registers are mapped at 321 * fixed virtual addresses very early in viper_start() so that we 322 * can use them while booting the kernel, and stay at the same address 323 * throughout whole kernel's life time. 324 * 325 * We use this table twice; once with bootstrap page table, and once 326 * with kernel's page table which we build up in initarm(). 327 */ 328 329 static const struct pmap_devmap viper_devmap[] = { 330 { 331 VIPER_GPIO_VBASE, 332 PXA2X0_GPIO_BASE, 333 L1_S_SIZE, 334 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 335 }, 336 { 337 VIPER_CLKMAN_VBASE, 338 PXA2X0_CLKMAN_BASE, 339 L1_S_SIZE, 340 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 341 }, 342 { 343 VIPER_INTCTL_VBASE, 344 PXA2X0_INTCTL_BASE, 345 L1_S_SIZE, 346 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 347 }, 348 { 349 VIPER_FFUART_VBASE, 350 PXA2X0_FFUART_BASE, 351 L1_S_SIZE, 352 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 353 }, 354 { 355 VIPER_BTUART_VBASE, 356 PXA2X0_BTUART_BASE, 357 L1_S_SIZE, 358 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 359 }, 360 361 {0, 0, 0, 0,} 362 }; 363 364 #ifndef MEMSTART 365 #define MEMSTART 0xa0000000 366 #endif 367 #ifndef MEMSIZE 368 #define MEMSIZE 0x4000000 369 #endif 370 371 /* 372 * u_int initarm(...) 373 * 374 * Initial entry point on startup. This gets called before main() is 375 * entered. 376 * It should be responsible for setting up everything that must be 377 * in place when main is called. 378 * This includes 379 * Taking a copy of the boot configuration structure. 380 * Initialising the physical console so characters can be printed. 381 * Setting up page tables for the kernel 382 * Relocating the kernel to the bottom of physical memory 383 */ 384 u_int 385 initarm(void *arg) 386 { 387 extern vaddr_t xscale_cache_clean_addr; 388 int loop; 389 int loop1; 390 u_int l1pagetable; 391 #ifdef DIAGNOSTIC 392 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 393 #endif 394 395 /* Register devmap for devices we mapped in start */ 396 pmap_devmap_register(viper_devmap); 397 398 /* start 32.768 kHz OSC */ 399 ioreg_write(VIPER_CLKMAN_VBASE + 0x08, 2); 400 /* Get ready for splfoo() */ 401 pxa2x0_intr_bootstrap(VIPER_INTCTL_VBASE); 402 403 /* 404 * Heads up ... Setup the CPU / MMU / TLB functions 405 */ 406 if (set_cpufuncs()) 407 panic("cpu not recognized!"); 408 409 #if 0 410 /* Calibrate the delay loop. */ 411 #endif 412 413 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 414 pxa2x0_gpio_bootstrap(VIPER_GPIO_VBASE); 415 pxa2x0_gpio_config(viper_gpioconf); 416 417 /* turn on clock to UART block. 418 XXX: this should not be done here. */ 419 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 420 ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN)); 421 422 consinit(); 423 #ifdef KGDB 424 kgdb_port_init(); 425 #endif 426 /* Talk to the user */ 427 printf("\nNetBSD/evbarm (viper) booting ...\n"); 428 429 #if 0 430 /* 431 * Examine the boot args string for options we need to know about 432 * now. 433 */ 434 process_kernel_args((char *)nwbootinfo.bt_args); 435 #endif 436 437 printf("initarm: Configuring system ...\n"); 438 439 /* Fake bootconfig structure for the benefit of pmap.c */ 440 /* XXX must make the memory description h/w independent */ 441 bootconfig.dramblocks = 1; 442 bootconfig.dram[0].address = MEMSTART; 443 bootconfig.dram[0].pages = MEMSIZE / PAGE_SIZE; 444 445 /* 446 * Set up the variables that define the availablilty of 447 * physical memory. For now, we're going to set 448 * physical_freestart to 0xa0200000 (where the kernel 449 * was loaded), and allocate the memory we need downwards. 450 * If we get too close to the page tables that RedBoot 451 * set up, we will panic. We will update physical_freestart 452 * and physical_freeend later to reflect what pmap_bootstrap() 453 * wants to see. 454 * 455 * XXX pmap_bootstrap() needs an enema. 456 * (now that would be truly hardcore XXX) 457 */ 458 physical_start = bootconfig.dram[0].address; 459 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 460 461 physical_freestart = 0xa0009000UL; 462 physical_freeend = 0xa0200000UL; 463 464 physmem = (physical_end - physical_start) / PAGE_SIZE; 465 466 #ifdef VERBOSE_INIT_ARM 467 /* Tell the user about the memory */ 468 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 469 physical_start, physical_end - 1); 470 #endif 471 472 /* 473 * Okay, the kernel starts 2MB in from the bottom of physical 474 * memory. We are going to allocate our bootstrap pages downwards 475 * from there. 476 * 477 * We need to allocate some fixed page tables to get the kernel 478 * going. We allocate one page directory and a number of page 479 * tables and store the physical addresses in the kernel_pt_table 480 * array. 481 * 482 * The kernel page directory must be on a 16K boundary. The page 483 * tables must be on 4K boundaries. What we do is allocate the 484 * page directory on the first 16K boundary that we encounter, and 485 * the page tables on 4K boundaries otherwise. Since we allocate 486 * at least 3 L2 page tables, we are guaranteed to encounter at 487 * least one 16K aligned region. 488 */ 489 490 #ifdef VERBOSE_INIT_ARM 491 printf("Allocating page tables\n"); 492 #endif 493 494 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 495 496 #ifdef VERBOSE_INIT_ARM 497 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 498 physical_freestart, free_pages, free_pages); 499 #endif 500 501 /* Define a macro to simplify memory allocation */ 502 #define valloc_pages(var, np) \ 503 alloc_pages((var).pv_pa, (np)); \ 504 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 505 506 #define alloc_pages(var, np) \ 507 physical_freeend -= ((np) * PAGE_SIZE); \ 508 if (physical_freeend < physical_freestart) \ 509 panic("initarm: out of memory"); \ 510 (var) = physical_freeend; \ 511 free_pages -= (np); \ 512 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 513 514 loop1 = 0; 515 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 516 /* Are we 16KB aligned for an L1 ? */ 517 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 518 && kernel_l1pt.pv_pa == 0) { 519 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 520 } else { 521 valloc_pages(kernel_pt_table[loop1], 522 L2_TABLE_SIZE / PAGE_SIZE); 523 ++loop1; 524 } 525 } 526 527 /* This should never be able to happen but better confirm that. */ 528 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 529 panic("initarm: Failed to align the kernel page directory"); 530 531 /* 532 * Allocate a page for the system page mapped to V0x00000000 533 * This page will just contain the system vectors and can be 534 * shared by all processes. 535 */ 536 alloc_pages(systempage.pv_pa, 1); 537 538 /* Allocate stacks for all modes */ 539 valloc_pages(irqstack, IRQ_STACK_SIZE); 540 valloc_pages(abtstack, ABT_STACK_SIZE); 541 valloc_pages(undstack, UND_STACK_SIZE); 542 valloc_pages(kernelstack, UPAGES); 543 544 /* Allocate enough pages for cleaning the Mini-Data cache. */ 545 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 546 valloc_pages(minidataclean, 1); 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 550 irqstack.pv_va); 551 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 552 abtstack.pv_va); 553 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 554 undstack.pv_va); 555 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 556 kernelstack.pv_va); 557 #endif 558 559 /* 560 * XXX Defer this to later so that we can reclaim the memory 561 * XXX used by the RedBoot page tables. 562 */ 563 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 564 565 /* 566 * Ok we have allocated physical pages for the primary kernel 567 * page tables 568 */ 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 572 #endif 573 574 /* 575 * Now we start construction of the L1 page table 576 * We start by mapping the L2 page tables into the L1. 577 * This means that we can replace L1 mappings later on if necessary 578 */ 579 l1pagetable = kernel_l1pt.pv_pa; 580 581 /* Map the L2 pages tables in the L1 page table */ 582 pmap_link_l2pt(l1pagetable, 0x00000000, 583 &kernel_pt_table[KERNEL_PT_SYS]); 584 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 585 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 586 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 587 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 588 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 589 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 590 591 /* update the top of the kernel VM */ 592 pmap_curmaxkvaddr = 593 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 594 595 #ifdef VERBOSE_INIT_ARM 596 printf("Mapping kernel\n"); 597 #endif 598 599 /* Now we fill in the L2 pagetable for the kernel static code/data */ 600 { 601 extern char etext[], _end[]; 602 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 603 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 604 u_int logical; 605 606 textsize = (textsize + PGOFSET) & ~PGOFSET; 607 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 608 609 logical = 0x00200000; /* offset of kernel in RAM */ 610 611 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 612 physical_start + logical, textsize, 613 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 615 physical_start + logical, totalsize - textsize, 616 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 } 618 619 #ifdef VERBOSE_INIT_ARM 620 printf("Constructing L2 page tables\n"); 621 #endif 622 623 /* Map the stack pages */ 624 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 625 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 627 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 629 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 631 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 632 633 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 634 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 635 636 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 637 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 638 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 639 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 640 } 641 642 /* Map the Mini-Data cache clean area. */ 643 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 644 minidataclean.pv_pa); 645 646 /* Map the vector page. */ 647 #if 1 648 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 649 * cache-clean code there. */ 650 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 651 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 652 #else 653 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 #endif 656 657 /* 658 * map integrated peripherals at same address in l1pagetable 659 * so that we can continue to use console. 660 */ 661 pmap_devmap_bootstrap(l1pagetable, viper_devmap); 662 663 /* 664 * Give the XScale global cache clean code an appropriately 665 * sized chunk of unmapped VA space starting at 0xff000000 666 * (our device mappings end before this address). 667 */ 668 xscale_cache_clean_addr = 0xff000000U; 669 670 /* 671 * Now we have the real page tables in place so we can switch to them. 672 * Once this is done we will be running with the REAL kernel page 673 * tables. 674 */ 675 676 /* 677 * Update the physical_freestart/physical_freeend/free_pages 678 * variables. 679 */ 680 { 681 extern char _end[]; 682 683 physical_freestart = physical_start + 684 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 685 KERNEL_BASE); 686 physical_freeend = physical_end; 687 free_pages = 688 (physical_freeend - physical_freestart) / PAGE_SIZE; 689 } 690 691 /* Switch tables */ 692 #ifdef VERBOSE_INIT_ARM 693 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 694 physical_freestart, free_pages, free_pages); 695 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 696 #endif 697 698 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 699 cpu_setttb(kernel_l1pt.pv_pa, true); 700 cpu_tlb_flushID(); 701 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 702 703 /* 704 * Moved from cpu_startup() as data_abort_handler() references 705 * this during uvm init 706 */ 707 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 708 709 #ifdef VERBOSE_INIT_ARM 710 printf("bootstrap done.\n"); 711 #endif 712 713 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 714 715 /* 716 * Pages were allocated during the secondary bootstrap for the 717 * stacks for different CPU modes. 718 * We must now set the r13 registers in the different CPU modes to 719 * point to these stacks. 720 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 721 * of the stack memory. 722 */ 723 printf("init subsystems: stacks "); 724 725 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 726 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 727 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 728 729 /* 730 * Well we should set a data abort handler. 731 * Once things get going this will change as we will need a proper 732 * handler. 733 * Until then we will use a handler that just panics but tells us 734 * why. 735 * Initialisation of the vectors will just panic on a data abort. 736 * This just fills in a slightly better one. 737 */ 738 printf("vectors "); 739 data_abort_handler_address = (u_int)data_abort_handler; 740 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 741 undefined_handler_address = (u_int)undefinedinstruction_bounce; 742 743 /* Initialise the undefined instruction handlers */ 744 printf("undefined "); 745 undefined_init(); 746 747 /* Load memory into UVM. */ 748 printf("page "); 749 uvm_md_init(); 750 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 751 atop(physical_freestart), atop(physical_freeend), 752 VM_FREELIST_DEFAULT); 753 754 /* Boot strap pmap telling it where the kernel page table is */ 755 printf("pmap "); 756 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 757 758 #ifdef __HAVE_MEMORY_DISK__ 759 md_root_setconf(memory_disk, sizeof memory_disk); 760 #endif 761 762 #ifdef KGDB 763 if (boothowto & RB_KDB) { 764 kgdb_debug_init = 1; 765 kgdb_connect(1); 766 } 767 #endif 768 769 #ifdef DDB 770 db_machine_init(); 771 772 /* Firmware doesn't load symbols. */ 773 ddb_init(0, NULL, NULL); 774 775 if (boothowto & RB_KDB) 776 Debugger(); 777 #endif 778 779 /* We return the new stack pointer address */ 780 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 781 } 782 783 #if 0 784 void 785 process_kernel_args(char *args) 786 { 787 788 boothowto = 0; 789 790 /* Make a local copy of the bootargs */ 791 strncpy(bootargs, args, MAX_BOOT_STRING); 792 793 args = bootargs; 794 boot_file = bootargs; 795 796 /* Skip the kernel image filename */ 797 while (*args != ' ' && *args != 0) 798 ++args; 799 800 if (*args != 0) 801 *args++ = 0; 802 803 while (*args == ' ') 804 ++args; 805 806 boot_args = args; 807 808 printf("bootfile: %s\n", boot_file); 809 printf("bootargs: %s\n", boot_args); 810 811 parse_mi_bootargs(boot_args); 812 } 813 #endif 814 815 #ifdef KGDB 816 #ifndef KGDB_DEVNAME 817 #define KGDB_DEVNAME "ffuart" 818 #endif 819 const char kgdb_devname[] = KGDB_DEVNAME; 820 821 #if (NCOM > 0) 822 #ifndef KGDB_DEVMODE 823 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 824 #endif 825 int comkgdbmode = KGDB_DEVMODE; 826 #endif /* NCOM */ 827 828 #endif /* KGDB */ 829 830 831 void 832 consinit(void) 833 { 834 static int consinit_called = 0; 835 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 836 #if 0 837 char *console = CONSDEVNAME; 838 #endif 839 840 if (consinit_called != 0) 841 return; 842 consinit_called = 1; 843 844 #if NCOM > 0 845 846 #ifdef FFUARTCONSOLE 847 #ifdef KGDB 848 if (0 == strcmp(kgdb_devname, "ffuart")) { 849 /* port is reserved for kgdb */ 850 } else 851 #endif 852 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 853 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 854 855 #if 0 856 /* XXX: can't call pxa2x0_clkman_config yet */ 857 pxa2x0_clkman_config(CKEN_FFUART, 1); 858 #else 859 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 860 ckenreg|CKEN_FFUART); 861 #endif 862 863 return; 864 } 865 866 #endif /* FFUARTCONSOLE */ 867 868 #ifdef BTUARTCONSOLE 869 #ifdef KGDB 870 if (0 == strcmp(kgdb_devname, "btuart")) { 871 /* port is reserved for kgdb */ 872 } else 873 #endif 874 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 875 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 876 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, 877 ckenreg|CKEN_BTUART); 878 return; 879 } 880 #endif /* BTUARTCONSOLE */ 881 882 /* no console, guess we're flying blind */ 883 884 #endif /* NCOM */ 885 886 } 887 888 #ifdef KGDB 889 void 890 kgdb_port_init(void) 891 { 892 #if (NCOM > 0) && defined(COM_PXA2X0) 893 paddr_t paddr = 0; 894 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN); 895 896 if (0 == strcmp(kgdb_devname, "ffuart")) { 897 paddr = PXA2X0_FFUART_BASE; 898 ckenreg |= CKEN_FFUART; 899 } 900 else if (0 == strcmp(kgdb_devname, "btuart")) { 901 paddr = PXA2X0_BTUART_BASE; 902 ckenreg |= CKEN_BTUART; 903 } 904 905 if (paddr && 906 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 907 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 908 909 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 910 } 911 #endif 912 } 913 #endif 914