g42xxeb_machdep.c revision 1.10
1 /* $NetBSD: g42xxeb_machdep.c,v 1.10 2006/11/24 22:04:22 wiz 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_ipkdb.h" 113 #include "opt_pmap_debug.h" 114 #include "opt_md.h" 115 #include "opt_com.h" 116 #include "md.h" 117 #include "lcd.h" 118 119 #include <sys/param.h> 120 #include <sys/device.h> 121 #include <sys/systm.h> 122 #include <sys/kernel.h> 123 #include <sys/exec.h> 124 #include <sys/proc.h> 125 #include <sys/msgbuf.h> 126 #include <sys/reboot.h> 127 #include <sys/termios.h> 128 #include <sys/ksyms.h> 129 130 #include <uvm/uvm_extern.h> 131 132 #include <sys/conf.h> 133 #include <dev/cons.h> 134 #include <dev/md.h> 135 136 #include <machine/db_machdep.h> 137 #include <ddb/db_sym.h> 138 #include <ddb/db_extern.h> 139 #ifdef KGDB 140 #include <sys/kgdb.h> 141 #endif 142 #ifdef IPKDB 143 #include <ipkdb/ipkdb.h> /* for prototypes */ 144 #include <machine/ipkdb.h> 145 #endif 146 147 #include <machine/bootconfig.h> 148 #include <machine/bus.h> 149 #include <machine/cpu.h> 150 #include <machine/frame.h> 151 #include <arm/undefined.h> 152 153 #include <arm/arm32/machdep.h> 154 155 #include <arm/xscale/pxa2x0reg.h> 156 #include <arm/xscale/pxa2x0var.h> 157 #include <arm/xscale/pxa2x0_gpio.h> 158 #include <evbarm/g42xxeb/g42xxeb_reg.h> 159 #include <evbarm/g42xxeb/g42xxeb_var.h> 160 161 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 162 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 163 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 164 165 /* 166 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 167 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 168 */ 169 #define KERNEL_VM_SIZE 0x0C000000 170 171 172 /* 173 * Address to call from cpu_reset() to reset the machine. 174 * This is machine architecture dependant as it varies depending 175 * on where the ROM appears when you turn the MMU off. 176 */ 177 178 u_int cpu_reset_address = 0; 179 180 /* Define various stack sizes in pages */ 181 #define IRQ_STACK_SIZE 1 182 #define ABT_STACK_SIZE 1 183 #ifdef IPKDB 184 #define UND_STACK_SIZE 2 185 #else 186 #define UND_STACK_SIZE 1 187 #endif 188 189 BootConfig bootconfig; /* Boot config storage */ 190 char *boot_args = NULL; 191 char *boot_file = NULL; 192 193 vm_offset_t physical_start; 194 vm_offset_t physical_freestart; 195 vm_offset_t physical_freeend; 196 vm_offset_t physical_end; 197 u_int free_pages; 198 vm_offset_t pagetables_start; 199 int physmem = 0; 200 201 /*int debug_flags;*/ 202 #ifndef PMAP_STATIC_L1S 203 int max_processes = 64; /* Default number */ 204 #endif /* !PMAP_STATIC_L1S */ 205 206 /* Physical and virtual addresses for some global pages */ 207 pv_addr_t systempage; 208 pv_addr_t irqstack; 209 pv_addr_t undstack; 210 pv_addr_t abtstack; 211 pv_addr_t kernelstack; 212 pv_addr_t minidataclean; 213 214 vm_offset_t msgbufphys; 215 216 extern u_int data_abort_handler_address; 217 extern u_int prefetch_abort_handler_address; 218 extern u_int undefined_handler_address; 219 220 #ifdef PMAP_DEBUG 221 extern int pmap_debug_level; 222 #endif 223 224 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 225 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 226 #define KERNEL_PT_KERNEL_NUM 4 227 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 228 /* Page tables for mapping kernel VM */ 229 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 230 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 231 232 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 233 234 struct user *proc0paddr; 235 236 /* Prototypes */ 237 238 #if 0 239 void process_kernel_args(char *); 240 #endif 241 242 void consinit(void); 243 void kgdb_port_init(void); 244 void change_clock(uint32_t v); 245 246 bs_protos(bs_notimpl); 247 248 #include "com.h" 249 #if NCOM > 0 250 #include <dev/ic/comreg.h> 251 #include <dev/ic/comvar.h> 252 #endif 253 254 #ifndef CONSPEED 255 #define CONSPEED B115200 /* What RedBoot uses */ 256 #endif 257 #ifndef CONMODE 258 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 259 #endif 260 261 int comcnspeed = CONSPEED; 262 int comcnmode = CONMODE; 263 264 /* 265 * void cpu_reboot(int howto, char *bootstr) 266 * 267 * Reboots the system 268 * 269 * Deal with any syncing, unmounting, dumping and shutdown hooks, 270 * then reset the CPU. 271 */ 272 void 273 cpu_reboot(int howto, char *bootstr) 274 { 275 #ifdef DIAGNOSTIC 276 /* info */ 277 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 278 #endif 279 280 /* 281 * If we are still cold then hit the air brakes 282 * and crash to earth fast 283 */ 284 if (cold) { 285 doshutdownhooks(); 286 printf("The operating system has halted.\n"); 287 printf("Please press any key to reboot.\n\n"); 288 cngetc(); 289 printf("rebooting...\n"); 290 cpu_reset(); 291 /*NOTREACHED*/ 292 } 293 294 /* Disable console buffering */ 295 /* cnpollc(1);*/ 296 297 /* 298 * If RB_NOSYNC was not specified sync the discs. 299 * Note: Unless cold is set to 1 here, syslogd will die during the 300 * unmount. It looks like syslogd is getting woken up only to find 301 * that it cannot page part of the binary in as the filesystem has 302 * been unmounted. 303 */ 304 if (!(howto & RB_NOSYNC)) 305 bootsync(); 306 307 /* Say NO to interrupts */ 308 splhigh(); 309 310 /* Do a dump if requested. */ 311 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 312 dumpsys(); 313 314 /* Run any shutdown hooks */ 315 doshutdownhooks(); 316 317 /* Make sure IRQ's are disabled */ 318 IRQdisable; 319 320 if (howto & RB_HALT) { 321 printf("The operating system has halted.\n"); 322 printf("Please press any key to reboot.\n\n"); 323 cngetc(); 324 } 325 326 printf("rebooting...\n"); 327 cpu_reset(); 328 /*NOTREACHED*/ 329 } 330 331 static inline 332 pd_entry_t * 333 read_ttb(void) 334 { 335 long ttb; 336 337 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 338 339 340 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 341 } 342 343 /* 344 * Static device mappings. These peripheral registers are mapped at 345 * fixed virtual addresses very early in initarm() so that we can use 346 * them while booting the kernel, and stay at the same address 347 * throughout whole kernel's life time. 348 * 349 * We use this table twice; once with bootstrap page table, and once 350 * with kernel's page table which we build up in initarm(). 351 * 352 * Since we map these registers into the bootstrap page table using 353 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 354 * registers segment-aligned and segment-rounded in order to avoid 355 * using the 2nd page tables. 356 */ 357 358 #define _A(a) ((a) & ~L1_S_OFFSET) 359 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 360 361 static const struct pmap_devmap g42xxeb_devmap[] = { 362 { 363 G42XXEB_PLDREG_VBASE, 364 _A(G42XXEB_PLDREG_BASE), 365 _S(G42XXEB_PLDREG_SIZE), 366 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 367 }, 368 { 369 G42XXEB_GPIO_VBASE, 370 _A(PXA2X0_GPIO_BASE), 371 _S(PXA250_GPIO_SIZE), 372 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 373 }, 374 { 375 G42XXEB_CLKMAN_VBASE, 376 _A(PXA2X0_CLKMAN_BASE), 377 _S(PXA2X0_CLKMAN_SIZE), 378 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 379 }, 380 { 381 G42XXEB_INTCTL_VBASE, 382 _A(PXA2X0_INTCTL_BASE), 383 _S(PXA2X0_INTCTL_SIZE), 384 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 385 }, 386 { 387 G42XXEB_FFUART_VBASE, 388 _A(PXA2X0_FFUART_BASE), 389 _S(4 * COM_NPORTS), 390 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 391 }, 392 { 393 G42XXEB_BTUART_VBASE, 394 _A(PXA2X0_BTUART_BASE), 395 _S(4 * COM_NPORTS), 396 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 397 }, 398 {0, 0, 0, 0,} 399 }; 400 401 #undef _A 402 #undef _S 403 404 405 /* 406 * u_int initarm(...) 407 * 408 * Initial entry point on startup. This gets called before main() is 409 * entered. 410 * It should be responsible for setting up everything that must be 411 * in place when main is called. 412 * This includes 413 * Taking a copy of the boot configuration structure. 414 * Initialising the physical console so characters can be printed. 415 * Setting up page tables for the kernel 416 * Relocating the kernel to the bottom of physical memory 417 */ 418 u_int 419 initarm(void *arg) 420 { 421 extern vaddr_t xscale_cache_clean_addr; 422 int loop; 423 int loop1; 424 u_int l1pagetable; 425 pv_addr_t kernel_l1pt; 426 paddr_t memstart; 427 psize_t memsize; 428 int led_data = 1; 429 #ifdef DIAGNOSTIC 430 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 431 #endif 432 433 #define LEDSTEP_P() ioreg8_write(G42XXEB_PLDREG_BASE+G42XXEB_LED, led_data++) 434 #define LEDSTEP() pldreg8_write(G42XXEB_LED, led_data++); 435 436 /* use physical address until pagetable is set */ 437 LEDSTEP_P(); 438 439 /* map some peripheral registers at static I/O area */ 440 pmap_devmap_bootstrap((vaddr_t)read_ttb(), g42xxeb_devmap); 441 442 LEDSTEP_P(); 443 444 /* start 32.768 kHz OSC */ 445 ioreg_write(G42XXEB_CLKMAN_VBASE + 0x08, 2); 446 /* Get ready for splfoo() */ 447 pxa2x0_intr_bootstrap(G42XXEB_INTCTL_VBASE); 448 449 LEDSTEP(); 450 451 /* 452 * Heads up ... Setup the CPU / MMU / TLB functions 453 */ 454 if (set_cpufuncs()) 455 panic("cpu not recognized!"); 456 457 LEDSTEP(); 458 459 /* 460 * Okay, RedBoot has provided us with the following memory map: 461 * 462 * Physical Address Range Description 463 * ----------------------- ---------------------------------- 464 * 0x00000000 - 0x01ffffff flash Memory (32MB) 465 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 466 * 0x08000000 - 0x080000ff I/O baseboard registers 467 * 0x0c000000 - 0x0c0fffff Ethernet Controller 468 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 469 * 0x40000000 - 0x480fffff Processor Registers 470 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 471 * 472 * 473 * Virtual Address Range X C B Description 474 * ----------------------- - - - ---------------------------------- 475 * 0x00000000 - 0x00003fff N Y Y SDRAM 476 * 0x00004000 - 0x01ffffff N Y N ROM 477 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 478 * 0x0a000000 - 0x0a0fffff N N N SRAM 479 * 0x40000000 - 0x480fffff N N N Processor Registers 480 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 481 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 482 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 483 * (done by this routine) 484 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 485 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 486 * 0xfd400000 - 0xfd4fffff N N N FF-UART 487 * 0xfd500000 - 0xfd5fffff N N N BT-UART 488 * 489 * RedBoot's first level page table is at 0xa0004000. There 490 * are also 2 second-level tables at 0xa0008000 and 491 * 0xa0008400. We will continue to use them until we switch to 492 * our pagetable by setttb(). 493 */ 494 495 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 496 497 LEDSTEP(); 498 499 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 500 pxa2x0_gpio_bootstrap(G42XXEB_GPIO_VBASE); 501 pxa2x0_gpio_set_function(42, GPIO_ALT_FN_1_IN); 502 pxa2x0_gpio_set_function(43, GPIO_ALT_FN_2_OUT); 503 pxa2x0_gpio_set_function(44, GPIO_ALT_FN_1_IN); 504 pxa2x0_gpio_set_function(45, GPIO_ALT_FN_2_OUT); 505 506 LEDSTEP(); 507 508 consinit(); 509 #ifdef KGDB 510 LEDSTEP(); 511 kgdb_port_init(); 512 #endif 513 514 LEDSTEP(); 515 516 /* Talk to the user */ 517 printf("\nNetBSD/evbarm (g42xxeb) booting ...\n"); 518 519 #if 0 520 /* 521 * Examine the boot args string for options we need to know about 522 * now. 523 */ 524 process_kernel_args((char *)nwbootinfo.bt_args); 525 #endif 526 527 memstart = 0xa0000000; 528 memsize = 0x04000000; /* 64MB */ 529 530 printf("initarm: Configuring system ...\n"); 531 532 /* Fake bootconfig structure for the benefit of pmap.c */ 533 /* XXX must make the memory description h/w independent */ 534 bootconfig.dramblocks = 1; 535 bootconfig.dram[0].address = memstart; 536 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 537 538 /* 539 * Set up the variables that define the availablilty of 540 * physical memory. For now, we're going to set 541 * physical_freestart to 0xa0200000 (where the kernel 542 * was loaded), and allocate the memory we need downwards. 543 * If we get too close to the L1 table that we set up, we 544 * will panic. We will update physical_freestart and 545 * physical_freeend later to reflect what pmap_bootstrap() 546 * wants to see. 547 * 548 * XXX pmap_bootstrap() needs an enema. 549 */ 550 physical_start = bootconfig.dram[0].address; 551 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 552 553 physical_freestart = 0xa0009000UL; 554 physical_freeend = 0xa0200000UL; 555 556 physmem = (physical_end - physical_start) / PAGE_SIZE; 557 558 #ifdef VERBOSE_INIT_ARM 559 /* Tell the user about the memory */ 560 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 561 physical_start, physical_end - 1); 562 #endif 563 564 /* 565 * Okay, the kernel starts 2MB in from the bottom of physical 566 * memory. We are going to allocate our bootstrap pages downwards 567 * from there. 568 * 569 * We need to allocate some fixed page tables to get the kernel 570 * going. We allocate one page directory and a number of page 571 * tables and store the physical addresses in the kernel_pt_table 572 * array. 573 * 574 * The kernel page directory must be on a 16K boundary. The page 575 * tables must be on 4K bounaries. What we do is allocate the 576 * page directory on the first 16K boundary that we encounter, and 577 * the page tables on 4K boundaries otherwise. Since we allocate 578 * at least 3 L2 page tables, we are guaranteed to encounter at 579 * least one 16K aligned region. 580 */ 581 582 #ifdef VERBOSE_INIT_ARM 583 printf("Allocating page tables\n"); 584 #endif 585 586 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 587 588 #ifdef VERBOSE_INIT_ARM 589 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 590 physical_freestart, free_pages, free_pages); 591 #endif 592 593 /* Define a macro to simplify memory allocation */ 594 #define valloc_pages(var, np) \ 595 alloc_pages((var).pv_pa, (np)); \ 596 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 597 598 #define alloc_pages(var, np) \ 599 physical_freeend -= ((np) * PAGE_SIZE); \ 600 if (physical_freeend < physical_freestart) \ 601 panic("initarm: out of memory"); \ 602 (var) = physical_freeend; \ 603 free_pages -= (np); \ 604 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 605 606 loop1 = 0; 607 kernel_l1pt.pv_pa = 0; 608 kernel_l1pt.pv_va = 0; 609 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 610 /* Are we 16KB aligned for an L1 ? */ 611 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 612 && kernel_l1pt.pv_pa == 0) { 613 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 614 } else { 615 valloc_pages(kernel_pt_table[loop1], 616 L2_TABLE_SIZE / PAGE_SIZE); 617 ++loop1; 618 } 619 } 620 621 /* This should never be able to happen but better confirm that. */ 622 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 623 panic("initarm: Failed to align the kernel page directory"); 624 625 LEDSTEP(); 626 627 /* 628 * Allocate a page for the system page mapped to V0x00000000 629 * This page will just contain the system vectors and can be 630 * shared by all processes. 631 */ 632 alloc_pages(systempage.pv_pa, 1); 633 634 /* Allocate stacks for all modes */ 635 valloc_pages(irqstack, IRQ_STACK_SIZE); 636 valloc_pages(abtstack, ABT_STACK_SIZE); 637 valloc_pages(undstack, UND_STACK_SIZE); 638 valloc_pages(kernelstack, UPAGES); 639 640 /* Allocate enough pages for cleaning the Mini-Data cache. */ 641 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 642 valloc_pages(minidataclean, 1); 643 644 #ifdef VERBOSE_INIT_ARM 645 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 646 irqstack.pv_va); 647 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 648 abtstack.pv_va); 649 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 650 undstack.pv_va); 651 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 652 kernelstack.pv_va); 653 #endif 654 655 /* 656 * XXX Defer this to later so that we can reclaim the memory 657 * XXX used by the RedBoot page tables. 658 */ 659 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 660 661 /* 662 * Ok we have allocated physical pages for the primary kernel 663 * page tables 664 */ 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 668 #endif 669 670 /* 671 * Now we start construction of the L1 page table 672 * We start by mapping the L2 page tables into the L1. 673 * This means that we can replace L1 mappings later on if necessary 674 */ 675 l1pagetable = kernel_l1pt.pv_pa; 676 677 /* Map the L2 pages tables in the L1 page table */ 678 pmap_link_l2pt(l1pagetable, 0x00000000, 679 &kernel_pt_table[KERNEL_PT_SYS]); 680 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 681 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 682 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 683 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 684 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 685 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 686 687 /* update the top of the kernel VM */ 688 pmap_curmaxkvaddr = 689 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("Mapping kernel\n"); 693 #endif 694 695 /* Now we fill in the L2 pagetable for the kernel static code/data */ 696 { 697 extern char etext[], _end[]; 698 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 699 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 700 u_int logical; 701 702 textsize = (textsize + PGOFSET) & ~PGOFSET; 703 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 704 705 logical = 0x00200000; /* offset of kernel in RAM */ 706 707 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 708 physical_start + logical, textsize, 709 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 710 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 711 physical_start + logical, totalsize - textsize, 712 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 713 } 714 715 #ifdef VERBOSE_INIT_ARM 716 printf("Constructing L2 page tables\n"); 717 #endif 718 719 /* Map the stack pages */ 720 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 721 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 722 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 723 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 724 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 725 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 726 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 727 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 728 729 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 730 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 731 732 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 733 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 734 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 735 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 736 } 737 738 /* Map the Mini-Data cache clean area. */ 739 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 740 minidataclean.pv_pa); 741 742 /* Map the vector page. */ 743 #if 1 744 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 745 * cache-clean code there. */ 746 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 747 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 748 #else 749 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 750 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 751 #endif 752 753 /* 754 * map integrated peripherals at same address in l1pagetable 755 * so that we can continue to use console. 756 */ 757 pmap_devmap_bootstrap(l1pagetable, g42xxeb_devmap); 758 759 /* 760 * Give the XScale global cache clean code an appropriately 761 * sized chunk of unmapped VA space starting at 0xff000000 762 * (our device mappings end before this address). 763 */ 764 xscale_cache_clean_addr = 0xff000000U; 765 766 /* 767 * Now we have the real page tables in place so we can switch to them. 768 * Once this is done we will be running with the REAL kernel page 769 * tables. 770 */ 771 772 /* 773 * Update the physical_freestart/physical_freeend/free_pages 774 * variables. 775 */ 776 { 777 extern char _end[]; 778 779 physical_freestart = physical_start + 780 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 781 KERNEL_BASE); 782 physical_freeend = physical_end; 783 free_pages = 784 (physical_freeend - physical_freestart) / PAGE_SIZE; 785 } 786 787 /* Switch tables */ 788 #ifdef VERBOSE_INIT_ARM 789 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 790 physical_freestart, free_pages, free_pages); 791 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 792 #endif 793 LEDSTEP(); 794 795 setttb(kernel_l1pt.pv_pa); 796 cpu_tlb_flushID(); 797 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 798 LEDSTEP(); 799 800 /* 801 * Moved from cpu_startup() as data_abort_handler() references 802 * this during uvm init 803 */ 804 proc0paddr = (struct user *)kernelstack.pv_va; 805 lwp0.l_addr = proc0paddr; 806 807 #ifdef VERBOSE_INIT_ARM 808 printf("bootstrap done.\n"); 809 #endif 810 811 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 812 813 /* 814 * Pages were allocated during the secondary bootstrap for the 815 * stacks for different CPU modes. 816 * We must now set the r13 registers in the different CPU modes to 817 * point to these stacks. 818 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 819 * of the stack memory. 820 */ 821 #ifdef VERBOSE_INIT_ARM 822 printf("init subsystems: stacks "); 823 #endif 824 825 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 826 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 827 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 828 829 /* 830 * Well we should set a data abort handler. 831 * Once things get going this will change as we will need a proper 832 * handler. 833 * Until then we will use a handler that just panics but tells us 834 * why. 835 * Initialisation of the vectors will just panic on a data abort. 836 * This just fills in a slighly better one. 837 */ 838 #ifdef VERBOSE_INIT_ARM 839 printf("vectors "); 840 #endif 841 data_abort_handler_address = (u_int)data_abort_handler; 842 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 843 undefined_handler_address = (u_int)undefinedinstruction_bounce; 844 845 /* Initialise the undefined instruction handlers */ 846 #ifdef VERBOSE_INIT_ARM 847 printf("undefined "); 848 #endif 849 undefined_init(); 850 851 /* Load memory into UVM. */ 852 #ifdef VERBOSE_INIT_ARM 853 printf("page "); 854 #endif 855 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 856 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 857 atop(physical_freestart), atop(physical_freeend), 858 VM_FREELIST_DEFAULT); 859 860 /* Boot strap pmap telling it where the kernel page table is */ 861 #ifdef VERBOSE_INIT_ARM 862 printf("pmap "); 863 #endif 864 LEDSTEP(); 865 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 866 KERNEL_VM_BASE + KERNEL_VM_SIZE); 867 LEDSTEP(); 868 869 #ifdef __HAVE_MEMORY_DISK__ 870 md_root_setconf(memory_disk, sizeof memory_disk); 871 #endif 872 873 #ifdef BOOTHOWTO 874 boothowto |= BOOTHOWTO; 875 #endif 876 877 { 878 uint8_t sw = pldreg8_read(G42XXEB_DIPSW); 879 880 if (0 == (sw & (1<<0))) 881 boothowto ^= RB_KDB; 882 if (0 == (sw & (1<<1))) 883 boothowto ^= RB_SINGLE; 884 } 885 886 LEDSTEP(); 887 888 #ifdef IPKDB 889 /* Initialise ipkdb */ 890 ipkdb_init(); 891 if (boothowto & RB_KDB) 892 ipkdb_connect(0); 893 #endif 894 895 #ifdef KGDB 896 if (boothowto & RB_KDB) { 897 kgdb_debug_init = 1; 898 kgdb_connect(1); 899 } 900 #endif 901 902 #ifdef DDB 903 db_machine_init(); 904 905 /* Firmware doesn't load symbols. */ 906 ddb_init(0, NULL, NULL); 907 908 if (boothowto & RB_KDB) 909 Debugger(); 910 #endif 911 912 pldreg8_write(G42XXEB_LED, 0); 913 914 /* We return the new stack pointer address */ 915 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 916 } 917 918 #if 0 919 void 920 process_kernel_args(char *args) 921 { 922 923 boothowto = 0; 924 925 /* Make a local copy of the bootargs */ 926 strncpy(bootargs, args, MAX_BOOT_STRING); 927 928 args = bootargs; 929 boot_file = bootargs; 930 931 /* Skip the kernel image filename */ 932 while (*args != ' ' && *args != 0) 933 ++args; 934 935 if (*args != 0) 936 *args++ = 0; 937 938 while (*args == ' ') 939 ++args; 940 941 boot_args = args; 942 943 printf("bootfile: %s\n", boot_file); 944 printf("bootargs: %s\n", boot_args); 945 946 parse_mi_bootargs(boot_args); 947 } 948 #endif 949 950 #ifdef KGDB 951 #ifndef KGDB_DEVNAME 952 #define KGDB_DEVNAME "ffuart" 953 #endif 954 const char kgdb_devname[] = KGDB_DEVNAME; 955 956 #if (NCOM > 0) 957 #ifndef KGDB_DEVMODE 958 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 959 #endif 960 int comkgdbmode = KGDB_DEVMODE; 961 #endif /* NCOM */ 962 963 #endif /* KGDB */ 964 965 966 void 967 consinit(void) 968 { 969 static int consinit_called = 0; 970 uint32_t ckenreg = ioreg_read(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN); 971 #if 0 972 char *console = CONSDEVNAME; 973 #endif 974 975 if (consinit_called != 0) 976 return; 977 978 consinit_called = 1; 979 980 #if NCOM > 0 981 982 #ifdef FFUARTCONSOLE 983 #ifdef KGDB 984 if (0 == strcmp(kgdb_devname, "ffuart")){ 985 /* port is reserved for kgdb */ 986 } else 987 #endif 988 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 989 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 990 #if 0 991 pxa2x0_clkman_config(CKEN_FFUART, 1); 992 #else 993 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, 994 ckenreg|CKEN_FFUART); 995 #endif 996 997 return; 998 } 999 #endif /* FFUARTCONSOLE */ 1000 1001 #ifdef BTUARTCONSOLE 1002 #ifdef KGDB 1003 if (0 == strcmp(kgdb_devname, "btuart")) { 1004 /* port is reserved for kgdb */ 1005 } else 1006 #endif 1007 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1008 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1009 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, 1010 ckenreg|CKEN_BTUART); 1011 return; 1012 } 1013 #endif /* BTUARTCONSOLE */ 1014 1015 1016 #endif /* NCOM */ 1017 1018 } 1019 1020 #ifdef KGDB 1021 void 1022 kgdb_port_init(void) 1023 { 1024 #if (NCOM > 0) && defined(COM_PXA2X0) 1025 paddr_t paddr = 0; 1026 uint32_t ckenreg = ioreg_read(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN); 1027 1028 if (0 == strcmp(kgdb_devname, "ffuart")) { 1029 paddr = PXA2X0_FFUART_BASE; 1030 ckenreg |= CKEN_FFUART; 1031 } 1032 else if (0 == strcmp(kgdb_devname, "btuart")) { 1033 paddr = PXA2X0_BTUART_BASE; 1034 ckenreg |= CKEN_BTUART; 1035 } 1036 1037 if (paddr && 1038 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1039 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1040 1041 ioreg_write(G42XXEB_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1042 1043 } 1044 1045 #endif 1046 } 1047 #endif 1048 1049
Indexes created Tue Oct 21 19:09:51 GMT 2025