g42xxeb_machdep.c revision 1.12.2.1
1 /* $NetBSD: g42xxeb_machdep.c,v 1.12.2.1 2008/02/18 21:04:27 mjf Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2004, 2005 Genetec Corporation. 5 * All rights reserved. 6 * 7 * Written by Hiroyuki Bessho for Genetec Corporation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. The name of Genetec Corporation may not be used to endorse or 18 * promote products derived from this software without specific prior 19 * written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 * 33 * Machine dependant functions for kernel setup for Genetec G4250EBX 34 * evaluation board. 35 * 36 * Based on iq80310_machhdep.c 37 */ 38 /* 39 * Copyright (c) 2001 Wasabi Systems, Inc. 40 * All rights reserved. 41 * 42 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed for the NetBSD Project by 55 * Wasabi Systems, Inc. 56 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 57 * or promote products derived from this software without specific prior 58 * written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 61 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 62 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 63 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 64 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 65 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 66 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 67 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 68 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 69 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 70 * POSSIBILITY OF SUCH DAMAGE. 71 */ 72 73 /* 74 * Copyright (c) 1997,1998 Mark Brinicombe. 75 * Copyright (c) 1997,1998 Causality Limited. 76 * All rights reserved. 77 * 78 * Redistribution and use in source and binary forms, with or without 79 * modification, are permitted provided that the following conditions 80 * are met: 81 * 1. Redistributions of source code must retain the above copyright 82 * notice, this list of conditions and the following disclaimer. 83 * 2. Redistributions in binary form must reproduce the above copyright 84 * notice, this list of conditions and the following disclaimer in the 85 * documentation and/or other materials provided with the distribution. 86 * 3. All advertising materials mentioning features or use of this software 87 * must display the following acknowledgement: 88 * This product includes software developed by Mark Brinicombe 89 * for the NetBSD Project. 90 * 4. The name of the company nor the name of the author may be used to 91 * endorse or promote products derived from this software without specific 92 * prior written permission. 93 * 94 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 95 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 96 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 97 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 98 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 99 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 100 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 104 * SUCH DAMAGE. 105 * 106 * Machine dependant functions for kernel setup for Intel IQ80310 evaluation 107 * boards using RedBoot firmware. 108 */ 109 110 #include "opt_ddb.h" 111 #include "opt_kgdb.h" 112 #include "opt_pmap_debug.h" 113 #include "opt_md.h" 114 #include "opt_com.h" 115 #include "md.h" 116 #include "lcd.h" 117 118 #include <sys/param.h> 119 #include <sys/device.h> 120 #include <sys/systm.h> 121 #include <sys/kernel.h> 122 #include <sys/exec.h> 123 #include <sys/proc.h> 124 #include <sys/msgbuf.h> 125 #include <sys/reboot.h> 126 #include <sys/termios.h> 127 #include <sys/ksyms.h> 128 129 #include <uvm/uvm_extern.h> 130 131 #include <sys/conf.h> 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 <machine/bus.h> 144 #include <machine/cpu.h> 145 #include <machine/frame.h> 146 #include <arm/undefined.h> 147 148 #include <arm/arm32/machdep.h> 149 150 #include <arm/xscale/pxa2x0reg.h> 151 #include <arm/xscale/pxa2x0var.h> 152 #include <arm/xscale/pxa2x0_gpio.h> 153 #include <evbarm/g42xxeb/g42xxeb_reg.h> 154 #include <evbarm/g42xxeb/g42xxeb_var.h> 155 156 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 157 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 158 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 159 160 /* 161 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 162 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 163 */ 164 #define KERNEL_VM_SIZE 0x0C000000 165 166 167 /* 168 * Address to call from cpu_reset() to reset the machine. 169 * This is machine architecture dependant as it varies depending 170 * on where the ROM appears when you turn the MMU off. 171 */ 172 173 u_int cpu_reset_address = 0; 174 175 /* Define various stack sizes in pages */ 176 #define IRQ_STACK_SIZE 1 177 #define ABT_STACK_SIZE 1 178 #define UND_STACK_SIZE 1 179 180 BootConfig bootconfig; /* Boot config storage */ 181 char *boot_args = NULL; 182 char *boot_file = NULL; 183 184 vm_offset_t physical_start; 185 vm_offset_t physical_freestart; 186 vm_offset_t physical_freeend; 187 vm_offset_t physical_end; 188 u_int free_pages; 189 vm_offset_t pagetables_start; 190 int physmem = 0; 191 192 /*int debug_flags;*/ 193 #ifndef PMAP_STATIC_L1S 194 int max_processes = 64; /* Default number */ 195 #endif /* !PMAP_STATIC_L1S */ 196 197 /* Physical and virtual addresses for some global pages */ 198 pv_addr_t systempage; 199 pv_addr_t irqstack; 200 pv_addr_t undstack; 201 pv_addr_t abtstack; 202 pv_addr_t kernelstack; 203 pv_addr_t minidataclean; 204 205 vm_offset_t msgbufphys; 206 207 extern u_int data_abort_handler_address; 208 extern u_int prefetch_abort_handler_address; 209 extern u_int undefined_handler_address; 210 211 #ifdef PMAP_DEBUG 212 extern int pmap_debug_level; 213 #endif 214 215 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 216 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 217 #define KERNEL_PT_KERNEL_NUM 4 218 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 219 /* Page tables for mapping kernel VM */ 220 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 221 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 222 223 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 224 225 struct user *proc0paddr; 226 227 /* Prototypes */ 228 229 #if 0 230 void process_kernel_args(char *); 231 #endif 232 233 void consinit(void); 234 void kgdb_port_init(void); 235 void change_clock(uint32_t v); 236 237 bs_protos(bs_notimpl); 238 239 #include "com.h" 240 #if NCOM > 0 241 #include <dev/ic/comreg.h> 242 #include <dev/ic/comvar.h> 243 #endif 244 245 #ifndef CONSPEED 246 #define CONSPEED B115200 /* What RedBoot uses */ 247 #endif 248 #ifndef CONMODE 249 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 250 #endif 251 252 int comcnspeed = CONSPEED; 253 int comcnmode = CONMODE; 254 255 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 256 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 257 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 258 259 { -1 } 260 }; 261 static struct pxa2x0_gpioconf *g42xxeb_gpioconf[] = { 262 pxa25x_com_btuart_gpioconf, 263 pxa25x_com_ffuart_gpioconf, 264 #if 0 265 pxa25x_com_stuart_gpioconf, 266 pxa25x_pxaacu_gpioconf, 267 #endif 268 boarddep_gpioconf, 269 NULL 270 }; 271 272 /* 273 * void cpu_reboot(int howto, char *bootstr) 274 * 275 * Reboots the system 276 * 277 * Deal with any syncing, unmounting, dumping and shutdown hooks, 278 * then reset the CPU. 279 */ 280 void 281 cpu_reboot(int howto, char *bootstr) 282 { 283 #ifdef DIAGNOSTIC 284 /* info */ 285 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 286 #endif 287 288 /* 289 * If we are still cold then hit the air brakes 290 * and crash to earth fast 291 */ 292 if (cold) { 293 doshutdownhooks(); 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 /* Make sure IRQ's are disabled */ 326 IRQdisable; 327 328 if (howto & RB_HALT) { 329 printf("The operating system has halted.\n"); 330 printf("Please press any key to reboot.\n\n"); 331 cngetc(); 332 } 333 334 printf("rebooting...\n"); 335 cpu_reset(); 336 /*NOTREACHED*/ 337 } 338 339 static inline 340 pd_entry_t * 341 read_ttb(void) 342 { 343 long ttb; 344 345 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 346 347 348 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 349 } 350 351 /* 352 * Static device mappings. These peripheral registers are mapped at 353 * fixed virtual addresses very early in initarm() so that we can use 354 * them while booting the kernel, and stay at the same address 355 * throughout whole kernel's life time. 356 * 357 * We use this table twice; once with bootstrap page table, and once 358 * with kernel's page table which we build up in initarm(). 359 * 360 * Since we map these registers into the bootstrap page table using 361 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 362 * registers segment-aligned and segment-rounded in order to avoid 363 * using the 2nd page tables. 364 */ 365 366 #define _A(a) ((a) & ~L1_S_OFFSET) 367 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 368 369 static const struct pmap_devmap g42xxeb_devmap[] = { 370 { 371 G42XXEB_PLDREG_VBASE, 372 _A(G42XXEB_PLDREG_BASE), 373 _S(G42XXEB_PLDREG_SIZE), 374 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 375 }, 376 { 377 G42XXEB_GPIO_VBASE, 378 _A(PXA2X0_GPIO_BASE), 379 _S(PXA250_GPIO_SIZE), 380 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 381 }, 382 { 383 G42XXEB_CLKMAN_VBASE, 384 _A(PXA2X0_CLKMAN_BASE), 385 _S(PXA2X0_CLKMAN_SIZE), 386 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 387 }, 388 { 389 G42XXEB_INTCTL_VBASE, 390 _A(PXA2X0_INTCTL_BASE), 391 _S(PXA2X0_INTCTL_SIZE), 392 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 393 }, 394 { 395 G42XXEB_FFUART_VBASE, 396 _A(PXA2X0_FFUART_BASE), 397 _S(4 * COM_NPORTS), 398 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 399 }, 400 { 401 G42XXEB_BTUART_VBASE, 402 _A(PXA2X0_BTUART_BASE), 403 _S(4 * COM_NPORTS), 404 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 405 }, 406 {0, 0, 0, 0,} 407 }; 408 409 #undef _A 410 #undef _S 411 412 413 /* 414 * u_int initarm(...) 415 * 416 * Initial entry point on startup. This gets called before main() is 417 * entered. 418 * It should be responsible for setting up everything that must be 419 * in place when main is called. 420 * This includes 421 * Taking a copy of the boot configuration structure. 422 * Initialising the physical console so characters can be printed. 423 * Setting up page tables for the kernel 424 * Relocating the kernel to the bottom of physical memory 425 */ 426 u_int 427 initarm(void *arg) 428 { 429 extern vaddr_t xscale_cache_clean_addr; 430 int loop; 431 int loop1; 432 u_int l1pagetable; 433 pv_addr_t kernel_l1pt; 434 paddr_t memstart; 435 psize_t memsize; 436 int led_data = 1; 437 #ifdef DIAGNOSTIC 438 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 439 #endif 440 441 #define LEDSTEP_P() ioreg8_write(G42XXEB_PLDREG_BASE+G42XXEB_LED, led_data++) 442 #define LEDSTEP() pldreg8_write(G42XXEB_LED, led_data++); 443 444 /* use physical address until pagetable is set */ 445 LEDSTEP_P(); 446 447 /* map some peripheral registers at static I/O area */ 448 pmap_devmap_bootstrap((vaddr_t)read_ttb(), g42xxeb_devmap); 449 450 LEDSTEP_P(); 451 452 /* start 32.768 kHz OSC */ 453 ioreg_write(G42XXEB_CLKMAN_VBASE + 0x08, 2); 454 /* Get ready for splfoo() */ 455 pxa2x0_intr_bootstrap(G42XXEB_INTCTL_VBASE); 456 457 LEDSTEP(); 458 459 /* 460 * Heads up ... Setup the CPU / MMU / TLB functions 461 */ 462 if (set_cpufuncs()) 463 panic("cpu not recognized!"); 464 465 LEDSTEP(); 466 467 /* 468 * Okay, RedBoot has provided us with the following memory map: 469 * 470 * Physical Address Range Description 471 * ----------------------- ---------------------------------- 472 * 0x00000000 - 0x01ffffff flash Memory (32MB) 473 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 474 * 0x08000000 - 0x080000ff I/O baseboard registers 475 * 0x0c000000 - 0x0c0fffff Ethernet Controller 476 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 477 * 0x40000000 - 0x480fffff Processor Registers 478 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 479 * 480 * 481 * Virtual Address Range X C B Description 482 * ----------------------- - - - ---------------------------------- 483 * 0x00000000 - 0x00003fff N Y Y SDRAM 484 * 0x00004000 - 0x01ffffff N Y N ROM 485 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 486 * 0x0a000000 - 0x0a0fffff N N N SRAM 487 * 0x40000000 - 0x480fffff N N N Processor Registers 488 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 489 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 490 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 491 * (done by this routine) 492 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 493 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 494 * 0xfd400000 - 0xfd4fffff N N N FF-UART 495 * 0xfd500000 - 0xfd5fffff N N N BT-UART 496 * 497 * RedBoot's first level page table is at 0xa0004000. There 498 * are also 2 second-level tables at 0xa0008000 and 499 * 0xa0008400. We will continue to use them until we switch to 500 * our pagetable by setttb(). 501 */ 502 503 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 504 505 LEDSTEP(); 506 507 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 508 pxa2x0_gpio_bootstrap(G42XXEB_GPIO_VBASE); 509 pxa2x0_gpio_config(g42xxeb_gpioconf); 510 511 LEDSTEP(); 512 513 consinit(); 514 #ifdef KGDB 515 LEDSTEP(); 516 kgdb_port_init(); 517 #endif 518 519 LEDSTEP(); 520 521 /* Talk to the user */ 522 printf("\nNetBSD/evbarm (g42xxeb) booting ...\n"); 523 524 #if 0 525 /* 526 * Examine the boot args string for options we need to know about 527 * now. 528 */ 529 process_kernel_args((char *)nwbootinfo.bt_args); 530 #endif 531 532 memstart = 0xa0000000; 533 memsize = 0x04000000; /* 64MB */ 534 535 printf("initarm: Configuring system ...\n"); 536 537 /* Fake bootconfig structure for the benefit of pmap.c */ 538 /* XXX must make the memory description h/w independent */ 539 bootconfig.dramblocks = 1; 540 bootconfig.dram[0].address = memstart; 541 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 542 543 /* 544 * Set up the variables that define the availablilty of 545 * physical memory. For now, we're going to set 546 * physical_freestart to 0xa0200000 (where the kernel 547 * was loaded), and allocate the memory we need downwards. 548 * If we get too close to the L1 table that we set up, we 549 * will panic. We will update physical_freestart and 550 * physical_freeend later to reflect what pmap_bootstrap() 551 * wants to see. 552 * 553 * XXX pmap_bootstrap() needs an enema. 554 */ 555 physical_start = bootconfig.dram[0].address; 556 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 557 558 physical_freestart = 0xa0009000UL; 559 physical_freeend = 0xa0200000UL; 560 561 physmem = (physical_end - physical_start) / PAGE_SIZE; 562 563 #ifdef VERBOSE_INIT_ARM 564 /* Tell the user about the memory */ 565 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 566 physical_start, physical_end - 1); 567 #endif 568 569 /* 570 * Okay, the kernel starts 2MB in from the bottom of physical 571 * memory. We are going to allocate our bootstrap pages downwards 572 * from there. 573 * 574 * We need to allocate some fixed page tables to get the kernel 575 * going. We allocate one page directory and a number of page 576 * tables and store the physical addresses in the kernel_pt_table 577 * array. 578 * 579 * The kernel page directory must be on a 16K boundary. The page 580 * tables must be on 4K bounaries. What we do is allocate the 581 * page directory on the first 16K boundary that we encounter, and 582 * the page tables on 4K boundaries otherwise. Since we allocate 583 * at least 3 L2 page tables, we are guaranteed to encounter at 584 * least one 16K aligned region. 585 */ 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("Allocating page tables\n"); 589 #endif 590 591 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 595 physical_freestart, free_pages, free_pages); 596 #endif 597 598 /* Define a macro to simplify memory allocation */ 599 #define valloc_pages(var, np) \ 600 alloc_pages((var).pv_pa, (np)); \ 601 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 602 603 #define alloc_pages(var, np) \ 604 physical_freeend -= ((np) * PAGE_SIZE); \ 605 if (physical_freeend < physical_freestart) \ 606 panic("initarm: out of memory"); \ 607 (var) = physical_freeend; \ 608 free_pages -= (np); \ 609 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 610 611 loop1 = 0; 612 kernel_l1pt.pv_pa = 0; 613 kernel_l1pt.pv_va = 0; 614 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 615 /* Are we 16KB aligned for an L1 ? */ 616 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 617 && kernel_l1pt.pv_pa == 0) { 618 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 619 } else { 620 valloc_pages(kernel_pt_table[loop1], 621 L2_TABLE_SIZE / PAGE_SIZE); 622 ++loop1; 623 } 624 } 625 626 /* This should never be able to happen but better confirm that. */ 627 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 628 panic("initarm: Failed to align the kernel page directory"); 629 630 LEDSTEP(); 631 632 /* 633 * Allocate a page for the system page mapped to V0x00000000 634 * This page will just contain the system vectors and can be 635 * shared by all processes. 636 */ 637 alloc_pages(systempage.pv_pa, 1); 638 639 /* Allocate stacks for all modes */ 640 valloc_pages(irqstack, IRQ_STACK_SIZE); 641 valloc_pages(abtstack, ABT_STACK_SIZE); 642 valloc_pages(undstack, UND_STACK_SIZE); 643 valloc_pages(kernelstack, UPAGES); 644 645 /* Allocate enough pages for cleaning the Mini-Data cache. */ 646 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 647 valloc_pages(minidataclean, 1); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 651 irqstack.pv_va); 652 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 653 abtstack.pv_va); 654 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 655 undstack.pv_va); 656 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 657 kernelstack.pv_va); 658 #endif 659 660 /* 661 * XXX Defer this to later so that we can reclaim the memory 662 * XXX used by the RedBoot page tables. 663 */ 664 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 665 666 /* 667 * Ok we have allocated physical pages for the primary kernel 668 * page tables 669 */ 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 673 #endif 674 675 /* 676 * Now we start construction of the L1 page table 677 * We start by mapping the L2 page tables into the L1. 678 * This means that we can replace L1 mappings later on if necessary 679 */ 680 l1pagetable = kernel_l1pt.pv_pa; 681 682 /* Map the L2 pages tables in the L1 page table */ 683 pmap_link_l2pt(l1pagetable, 0x00000000, 684 &kernel_pt_table[KERNEL_PT_SYS]); 685 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 686 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 687 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 688 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 689 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 690 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 691 692 /* update the top of the kernel VM */ 693 pmap_curmaxkvaddr = 694 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 695 696 #ifdef VERBOSE_INIT_ARM 697 printf("Mapping kernel\n"); 698 #endif 699 700 /* Now we fill in the L2 pagetable for the kernel static code/data */ 701 { 702 extern char etext[], _end[]; 703 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 704 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 705 u_int logical; 706 707 textsize = (textsize + PGOFSET) & ~PGOFSET; 708 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 709 710 logical = 0x00200000; /* offset of kernel in RAM */ 711 712 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 713 physical_start + logical, textsize, 714 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 715 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 716 physical_start + logical, totalsize - textsize, 717 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 718 } 719 720 #ifdef VERBOSE_INIT_ARM 721 printf("Constructing L2 page tables\n"); 722 #endif 723 724 /* Map the stack pages */ 725 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 726 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 728 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 729 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 730 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 731 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 732 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 733 734 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 735 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 736 737 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 738 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 739 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 740 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 741 } 742 743 /* Map the Mini-Data cache clean area. */ 744 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 745 minidataclean.pv_pa); 746 747 /* Map the vector page. */ 748 #if 1 749 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 750 * cache-clean code there. */ 751 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 752 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 753 #else 754 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 755 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 756 #endif 757 758 /* 759 * map integrated peripherals at same address in l1pagetable 760 * so that we can continue to use console. 761 */ 762 pmap_devmap_bootstrap(l1pagetable, g42xxeb_devmap); 763 764 /* 765 * Give the XScale global cache clean code an appropriately 766 * sized chunk of unmapped VA space starting at 0xff000000 767 * (our device mappings end before this address). 768 */ 769 xscale_cache_clean_addr = 0xff000000U; 770 771 /* 772 * Now we have the real page tables in place so we can switch to them. 773 * Once this is done we will be running with the REAL kernel page 774 * tables. 775 */ 776 777 /* 778 * Update the physical_freestart/physical_freeend/free_pages 779 * variables. 780 */ 781 { 782 extern char _end[]; 783 784 physical_freestart = physical_start + 785 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 786 KERNEL_BASE); 787 physical_freeend = physical_end; 788 free_pages = 789 (physical_freeend - physical_freestart) / PAGE_SIZE; 790 } 791 792 /* Switch tables */ 793 #ifdef VERBOSE_INIT_ARM 794 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 795 physical_freestart, free_pages, free_pages); 796 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 797 #endif 798 LEDSTEP(); 799 800 setttb(kernel_l1pt.pv_pa); 801 cpu_tlb_flushID(); 802 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 803 LEDSTEP(); 804 805 /* 806 * Moved from cpu_startup() as data_abort_handler() references 807 * this during uvm init 808 */ 809 proc0paddr = (struct user *)kernelstack.pv_va; 810 lwp0.l_addr = proc0paddr; 811 812 #ifdef VERBOSE_INIT_ARM 813 printf("bootstrap done.\n"); 814 #endif 815 816 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 817 818 /* 819 * Pages were allocated during the secondary bootstrap for the 820 * stacks for different CPU modes. 821 * We must now set the r13 registers in the different CPU modes to 822 * point to these stacks. 823 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 824 * of the stack memory. 825 */ 826 #ifdef VERBOSE_INIT_ARM 827 printf("init subsystems: stacks "); 828 #endif 829 830 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 831 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 832 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 833 834 /* 835 * Well we should set a data abort handler. 836 * Once things get going this will change as we will need a proper 837 * handler. 838 * Until then we will use a handler that just panics but tells us 839 * why. 840 * Initialisation of the vectors will just panic on a data abort. 841 * This just fills in a slighly better one. 842 */ 843 #ifdef VERBOSE_INIT_ARM 844 printf("vectors "); 845 #endif 846 data_abort_handler_address = (u_int)data_abort_handler; 847 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 848 undefined_handler_address = (u_int)undefinedinstruction_bounce; 849 850 /* Initialise the undefined instruction handlers */ 851 #ifdef VERBOSE_INIT_ARM 852 printf("undefined "); 853 #endif 854 undefined_init(); 855 856 /* Load memory into UVM. */ 857 #ifdef VERBOSE_INIT_ARM 858 printf("page "); 859 #endif 860 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 861 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 862 atop(physical_freestart), atop(physical_freeend), 863 VM_FREELIST_DEFAULT); 864 865 /* Boot strap pmap telling it where the kernel page table is */ 866 #ifdef VERBOSE_INIT_ARM 867 printf("pmap "); 868 #endif 869 LEDSTEP(); 870 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 871 KERNEL_VM_BASE + KERNEL_VM_SIZE); 872 LEDSTEP(); 873 874 #ifdef __HAVE_MEMORY_DISK__ 875 md_root_setconf(memory_disk, sizeof memory_disk); 876 #endif 877 878 #ifdef BOOTHOWTO 879 boothowto |= BOOTHOWTO; 880 #endif 881 882 { 883 uint8_t sw = pldreg8_read(G42XXEB_DIPSW); 884 885 if (0 == (sw & (1<<0))) 886 boothowto ^= RB_KDB; 887 if (0 == (sw & (1<<1))) 888 boothowto ^= RB_SINGLE; 889 } 890 891 LEDSTEP(); 892 893 #ifdef KGDB 894 if (boothowto & RB_KDB) { 895 kgdb_debug_init = 1; 896 kgdb_connect(1); 897 } 898 #endif 899 900 #ifdef DDB 901 db_machine_init(); 902 903 /* Firmware doesn't load symbols. */ 904 ddb_init(0, NULL, NULL); 905 906 if (boothowto & RB_KDB) 907 Debugger(); 908 #endif 909 910 pldreg8_write(G42XXEB_LED, 0); 911 912 /* We return the new stack pointer address */ 913 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 914 } 915 916 #if 0 917 void 918 process_kernel_args(char *args) 919 { 920 921 boothowto = 0; 922 923 /* Make a local copy of the bootargs */ 924 strncpy(bootargs, args, MAX_BOOT_STRING); 925 926 args = bootargs; 927 boot_file = bootargs; 928 929 /* Skip the kernel image filename */ 930 while (*args != ' ' && *args != 0) 931 ++args; 932 933 if (*args != 0) 934 *args++ = 0; 935 936 while (*args == ' ') 937 ++args; 938 939 boot_args = args; 940 941 printf("bootfile: %s\n", boot_file); 942 printf("bootargs: %s\n", boot_args); 943 944 parse_mi_bootargs(boot_args); 945 } 946 #endif 947 948 #ifdef KGDB 949 #ifndef KGDB_DEVNAME 950 #define KGDB_DEVNAME "ffuart" 951 #endif 952 const char kgdb_devname[] = KGDB_DEVNAME; 953 954 #if (NCOM > 0) 955 #ifndef KGDB_DEVMODE 956 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 957 #endif 958 int comkgdbmode = KGDB_DEVMODE; 959 #endif /* NCOM */ 960 961 #endif /* KGDB */ 962 963 964 void 965 consinit(void) 966 { 967 static int consinit_called = 0; 968 uint32_t ckenreg = ioreg_read(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN); 969 #if 0 970 char *console = CONSDEVNAME; 971 #endif 972 973 if (consinit_called != 0) 974 return; 975 976 consinit_called = 1; 977 978 #if NCOM > 0 979 980 #ifdef FFUARTCONSOLE 981 #ifdef KGDB 982 if (0 == strcmp(kgdb_devname, "ffuart")){ 983 /* port is reserved for kgdb */ 984 } else 985 #endif 986 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 987 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 988 #if 0 989 pxa2x0_clkman_config(CKEN_FFUART, 1); 990 #else 991 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, 992 ckenreg|CKEN_FFUART); 993 #endif 994 995 return; 996 } 997 #endif /* FFUARTCONSOLE */ 998 999 #ifdef BTUARTCONSOLE 1000 #ifdef KGDB 1001 if (0 == strcmp(kgdb_devname, "btuart")) { 1002 /* port is reserved for kgdb */ 1003 } else 1004 #endif 1005 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1006 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1007 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, 1008 ckenreg|CKEN_BTUART); 1009 return; 1010 } 1011 #endif /* BTUARTCONSOLE */ 1012 1013 1014 #endif /* NCOM */ 1015 1016 } 1017 1018 #ifdef KGDB 1019 void 1020 kgdb_port_init(void) 1021 { 1022 #if (NCOM > 0) && defined(COM_PXA2X0) 1023 paddr_t paddr = 0; 1024 uint32_t ckenreg = ioreg_read(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN); 1025 1026 if (0 == strcmp(kgdb_devname, "ffuart")) { 1027 paddr = PXA2X0_FFUART_BASE; 1028 ckenreg |= CKEN_FFUART; 1029 } 1030 else if (0 == strcmp(kgdb_devname, "btuart")) { 1031 paddr = PXA2X0_BTUART_BASE; 1032 ckenreg |= CKEN_BTUART; 1033 } 1034 1035 if (paddr && 1036 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1037 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1038 1039 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1040 1041 } 1042 1043 #endif 1044 } 1045 #endif 1046 1047
Indexes created Fri Oct 31 11:10:07 GMT 2025