1 /* $NetBSD: ixm1200_machdep.c,v 1.55 2014/02/22 19:03:57 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 5 * Ichiro FUKUHARA <ichiro@ichiro.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 /* 30 * Copyright (c) 1997,1998 Mark Brinicombe. 31 * Copyright (c) 1997,1998 Causality Limited. 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by Mark Brinicombe 45 * for the NetBSD Project. 46 * 4. The name of the company nor the name of the author may be used to 47 * endorse or promote products derived from this software without specific 48 * prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 51 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 52 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 54 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 55 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.55 2014/02/22 19:03:57 matt Exp $"); 65 66 #include "opt_ddb.h" 67 #include "opt_modular.h" 68 #include "opt_pmap_debug.h" 69 70 #include <sys/param.h> 71 #include <sys/device.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/exec.h> 75 #include <sys/proc.h> 76 #include <sys/msgbuf.h> 77 #include <sys/reboot.h> 78 #include <sys/termios.h> 79 #include <sys/ksyms.h> 80 #include <sys/bus.h> 81 #include <sys/cpu.h> 82 83 #include <uvm/uvm_extern.h> 84 85 #include <dev/cons.h> 86 87 #include "ksyms.h" 88 89 #if NKSYMS || defined(DDB) || defined(MODULAR) 90 #include <machine/db_machdep.h> 91 #include <ddb/db_sym.h> 92 #include <ddb/db_extern.h> 93 #ifndef DB_ELFSIZE 94 #error Must define DB_ELFSIZE! 95 #endif 96 #define ELFSIZE DB_ELFSIZE 97 #include <sys/exec_elf.h> 98 #endif 99 100 #include <machine/bootconfig.h> 101 #include <arm/locore.h> 102 #include <arm/undefined.h> 103 104 #include <arm/arm32/machdep.h> 105 106 #include <arm/ixp12x0/ixp12x0reg.h> 107 #include <arm/ixp12x0/ixp12x0var.h> 108 #include <arm/ixp12x0/ixp12x0_comreg.h> 109 #include <arm/ixp12x0/ixp12x0_comvar.h> 110 #include <arm/ixp12x0/ixp12x0_pcireg.h> 111 112 #include <evbarm/ixm1200/ixm1200reg.h> 113 #include <evbarm/ixm1200/ixm1200var.h> 114 115 /* XXX for consinit related hacks */ 116 #include <sys/conf.h> 117 118 void ixp12x0_reset(void) __attribute__((noreturn)); 119 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124 /* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128 #define KERNEL_VM_SIZE 0x0C000000 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependent as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 */ 135 136 /* 137 * Define the default console speed for the board. 138 */ 139 #ifndef CONMODE 140 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 141 #endif 142 #ifndef CONSPEED 143 #define CONSPEED B38400 144 #endif 145 #ifndef CONADDR 146 #define CONADDR IXPCOM_UART_BASE 147 #endif 148 149 BootConfig bootconfig; /* Boot config storage */ 150 char *boot_args = NULL; 151 char *boot_file = NULL; 152 153 vm_offset_t physical_start; 154 vm_offset_t physical_freestart; 155 vm_offset_t physical_freeend; 156 vm_offset_t physical_end; 157 u_int free_pages; 158 159 /*int debug_flags;*/ 160 #ifndef PMAP_STATIC_L1S 161 int max_processes = 64; /* Default number */ 162 #endif /* !PMAP_STATIC_L1S */ 163 164 vm_offset_t msgbufphys; 165 166 extern int end; 167 168 #ifdef PMAP_DEBUG 169 extern int pmap_debug_level; 170 #endif /* PMAP_DEBUG */ 171 172 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 173 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 174 #define KERNEL_PT_KERNEL_NUM 2 175 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 176 /* Page table for mapping IO */ 177 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 178 /* Page tables for mapping kernel VM */ 179 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 180 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 181 182 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 183 184 #ifdef CPU_IXP12X0 185 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 186 extern unsigned int ixp12x0_cache_clean_addr; 187 extern unsigned int ixp12x0_cache_clean_size; 188 static vaddr_t ixp12x0_cc_base; 189 #endif /* CPU_IXP12X0 */ 190 191 /* Prototypes */ 192 193 void consinit(void); 194 u_int cpu_get_control(void); 195 196 void ixdp_ixp12x0_cc_setup(void); 197 198 /* 199 * void cpu_reboot(int howto, char *bootstr) 200 * 201 * Reboots the system 202 * 203 * Deal with any syncing, unmounting, dumping and shutdown hooks, 204 * then reset the CPU. 205 */ 206 207 void 208 cpu_reboot(int howto, char *bootstr) 209 { 210 /* 211 * If we are still cold then hit the air brakes 212 * and crash to earth fast 213 */ 214 if (cold) { 215 doshutdownhooks(); 216 pmf_system_shutdown(boothowto); 217 printf("Halted while still in the ICE age.\n"); 218 printf("The operating system has halted.\n"); 219 printf("Please press any key to reboot.\n\n"); 220 cngetc(); 221 printf("rebooting...\n"); 222 ixp12x0_reset(); 223 } 224 225 /* Disable console buffering */ 226 cnpollc(1); 227 228 /* 229 * If RB_NOSYNC was not specified sync the discs. 230 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 231 * It looks like syslogd is getting woken up only to find that it cannot 232 * page part of the binary in as the filesystem has been unmounted. 233 */ 234 if (!(howto & RB_NOSYNC)) 235 bootsync(); 236 237 /* Say NO to interrupts */ 238 splhigh(); 239 240 /* Do a dump if requested. */ 241 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 242 dumpsys(); 243 244 /* Run any shutdown hooks */ 245 doshutdownhooks(); 246 247 pmf_system_shutdown(boothowto); 248 249 /* Make sure IRQ's are disabled */ 250 IRQdisable; 251 252 if (howto & RB_HALT) { 253 printf("The operating system has halted.\n"); 254 printf("Please press any key to reboot.\n\n"); 255 cngetc(); 256 } 257 258 printf("rebooting...\n"); 259 260 /* all interrupts are disabled */ 261 disable_interrupts(I32_bit); 262 263 ixp12x0_reset(); 264 265 /* ...and if that didn't work, just croak. */ 266 printf("RESET FAILED!\n"); 267 for (;;); 268 } 269 270 /* Static device mappings. */ 271 static const struct pmap_devmap ixm1200_devmap[] = { 272 /* StrongARM System and Peripheral Registers */ 273 { 274 IXP12X0_SYS_VBASE, 275 IXP12X0_SYS_HWBASE, 276 IXP12X0_SYS_SIZE, 277 VM_PROT_READ|VM_PROT_WRITE, 278 PTE_NOCACHE, 279 }, 280 /* PCI Registers Accessible Through StrongARM Core */ 281 { 282 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 283 IXP12X0_PCI_SIZE, 284 VM_PROT_READ|VM_PROT_WRITE, 285 PTE_NOCACHE, 286 }, 287 /* PCI Registers Accessible Through I/O Cycle Access */ 288 { 289 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 290 IXP12X0_PCI_IO_SIZE, 291 VM_PROT_READ|VM_PROT_WRITE, 292 PTE_NOCACHE, 293 }, 294 /* PCI Type0 Configuration Space */ 295 { 296 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 297 IXP12X0_PCI_TYPE0_SIZE, 298 VM_PROT_READ|VM_PROT_WRITE, 299 PTE_NOCACHE, 300 }, 301 /* PCI Type1 Configuration Space */ 302 { 303 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 304 IXP12X0_PCI_TYPE1_SIZE, 305 VM_PROT_READ|VM_PROT_WRITE, 306 PTE_NOCACHE, 307 }, 308 { 309 0, 310 0, 311 0, 312 0, 313 0 314 }, 315 }; 316 317 /* 318 * Initial entry point on startup. This gets called before main() is 319 * entered. 320 * It should be responsible for setting up everything that must be 321 * in place when main is called. 322 * This includes 323 * Taking a copy of the boot configuration structure. 324 * Initialising the physical console so characters can be printed. 325 * Setting up page tables for the kernel 326 * Relocating the kernel to the bottom of physical memory 327 */ 328 u_int 329 initarm(void *arg) 330 { 331 int loop; 332 int loop1; 333 u_int kerneldatasize, symbolsize; 334 vaddr_t l1pagetable; 335 vaddr_t freemempos; 336 #if NKSYMS || defined(DDB) || defined(MODULAR) 337 Elf_Shdr *sh; 338 #endif 339 340 cpu_reset_address = ixp12x0_reset; 341 342 /* 343 * Since we map v0xf0000000 == p0x90000000, it's possible for 344 * us to initialize the console now. 345 */ 346 consinit(); 347 348 #ifdef VERBOSE_INIT_ARM 349 /* Talk to the user */ 350 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 351 #endif 352 353 /* 354 * Heads up ... Setup the CPU / MMU / TLB functions 355 */ 356 if (set_cpufuncs()) 357 panic("CPU not recognized!"); 358 359 /* XXX overwrite bootconfig to hardcoded values */ 360 bootconfig.dram[0].address = 0xc0000000; 361 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 362 bootconfig.dramblocks = 1; 363 364 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 365 366 symbolsize = 0; 367 368 #ifdef PMAP_DEBUG 369 pmap_debug(-1); 370 #endif 371 372 #if NKSYMS || defined(DDB) || defined(MODULAR) 373 if (! memcmp(&end, "\177ELF", 4)) { 374 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 375 loop = ((Elf_Ehdr *)&end)->e_shnum; 376 for(; loop; loop--, sh++) 377 if (sh->sh_offset > 0 && 378 (sh->sh_offset + sh->sh_size) > symbolsize) 379 symbolsize = sh->sh_offset + sh->sh_size; 380 } 381 #endif 382 #ifdef VERBOSE_INIT_ARM 383 printf("kernsize=0x%x\n", kerneldatasize); 384 #endif 385 kerneldatasize += symbolsize; 386 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 387 388 /* 389 * Set up the variables that define the availablilty of physcial 390 * memory 391 */ 392 physical_start = bootconfig.dram[0].address; 393 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 394 395 physical_freestart = physical_start 396 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 397 physical_freeend = physical_end; 398 399 physmem = (physical_end - physical_start) / PAGE_SIZE; 400 401 freemempos = 0xc0000000; 402 403 #ifdef VERBOSE_INIT_ARM 404 printf("Allocating page tables\n"); 405 #endif 406 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 407 408 #ifdef VERBOSE_INIT_ARM 409 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 410 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 411 physical_freestart, free_pages, free_pages); 412 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 413 physical_start, physical_end); 414 #endif 415 416 /* Define a macro to simplify memory allocation */ 417 #define valloc_pages(var, np) \ 418 alloc_pages((var).pv_pa, (np)); \ 419 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 420 #define alloc_pages(var, np) \ 421 (var) = freemempos; \ 422 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 423 freemempos += (np) * PAGE_SIZE; 424 425 loop1 = 0; 426 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 427 /* Are we 16KB aligned for an L1 ? */ 428 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 429 && kernel_l1pt.pv_pa == 0) { 430 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 431 } else { 432 valloc_pages(kernel_pt_table[loop1], 433 L2_TABLE_SIZE / PAGE_SIZE); 434 ++loop1; 435 } 436 } 437 438 #ifdef DIAGNOSTIC 439 /* This should never be able to happen but better confirm that. */ 440 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 441 panic("initarm: Failed to align the kernel page directory"); 442 #endif 443 444 /* 445 * Allocate a page for the system page mapped to V0x00000000 446 * This page will just contain the system vectors and can be 447 * shared by all processes. 448 */ 449 alloc_pages(systempage.pv_pa, 1); 450 451 /* Allocate stacks for all modes */ 452 valloc_pages(irqstack, IRQ_STACK_SIZE); 453 valloc_pages(abtstack, ABT_STACK_SIZE); 454 valloc_pages(undstack, UND_STACK_SIZE); 455 valloc_pages(kernelstack, UPAGES); 456 457 #ifdef VERBOSE_INIT_ARM 458 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 459 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 460 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 461 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 462 #endif 463 464 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 465 466 #ifdef CPU_IXP12X0 467 /* 468 * XXX totally stuffed hack to work round problems introduced 469 * in recent versions of the pmap code. Due to the calls used there 470 * we cannot allocate virtual memory during bootstrap. 471 */ 472 for(;;) { 473 alloc_pages(ixp12x0_cc_base, 1); 474 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 475 break; 476 } 477 { 478 vaddr_t dummy; 479 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 480 } 481 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 482 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 483 #endif /* CPU_IXP12X0 */ 484 485 #ifdef VERBOSE_INIT_ARM 486 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 487 #endif 488 489 /* 490 * Now we start construction of the L1 page table 491 * We start by mapping the L2 page tables into the L1. 492 * This means that we can replace L1 mappings later on if necessary 493 */ 494 l1pagetable = kernel_l1pt.pv_pa; 495 496 /* Map the L2 pages tables in the L1 page table */ 497 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 498 &kernel_pt_table[KERNEL_PT_SYS]); 499 500 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 501 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 502 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 503 504 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 505 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 506 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 507 508 /* update the top of the kernel VM */ 509 pmap_curmaxkvaddr = 510 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 511 512 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 513 &kernel_pt_table[KERNEL_PT_IO]); 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("Mapping kernel\n"); 517 #endif 518 519 #if XXX 520 /* Now we fill in the L2 pagetable for the kernel code/data */ 521 { 522 extern char etext[], _end[]; 523 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 524 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 525 u_int logical; 526 527 textsize = (textsize + PGOFSET) & ~PGOFSET; 528 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 529 530 logical = 0x00200000; /* offset of kernel in RAM */ 531 532 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 533 physical_start + logical, textsize, 534 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 535 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 536 physical_start + logical, totalsize - textsize, 537 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 538 } 539 #else 540 { 541 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 542 KERNEL_TEXT_BASE, kerneldatasize, 543 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 544 } 545 #endif 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("Constructing L2 page tables\n"); 549 #endif 550 551 /* Map the stack pages */ 552 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 553 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 554 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 555 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 556 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 557 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 558 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 559 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 560 561 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 562 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 563 564 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 565 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 566 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 567 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 568 } 569 570 /* Map the vector page. */ 571 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 572 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 574 #ifdef VERBOSE_INIT_ARM 575 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 576 systempage.pv_pa, vector_page); 577 #endif 578 579 /* Map the statically mapped devices. */ 580 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 581 582 #ifdef VERBOSE_INIT_ARM 583 printf("done.\n"); 584 #endif 585 586 /* 587 * Map the Dcache Flush page. 588 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 589 */ 590 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 591 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 592 593 /* 594 * Now we have the real page tables in place so we can switch to them. 595 * Once this is done we will be running with the REAL kernel page 596 * tables. 597 */ 598 599 /* Switch tables */ 600 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 601 cpu_setttb(kernel_l1pt.pv_pa, true); 602 cpu_tlb_flushID(); 603 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 604 605 /* 606 * Moved here from cpu_startup() as data_abort_handler() references 607 * this during init 608 */ 609 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 610 611 /* 612 * We must now clean the cache again.... 613 * Cleaning may be done by reading new data to displace any 614 * dirty data in the cache. This will have happened in cpu_setttb() 615 * but since we are boot strapping the addresses used for the read 616 * may have just been remapped and thus the cache could be out 617 * of sync. A re-clean after the switch will cure this. 618 * After booting there are no gross reloations of the kernel thus 619 * this problem will not occur after initarm(). 620 */ 621 cpu_idcache_wbinv_all(); 622 623 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 624 625 /* 626 * Pages were allocated during the secondary bootstrap for the 627 * stacks for different CPU modes. 628 * We must now set the r13 registers in the different CPU modes to 629 * point to these stacks. 630 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 631 * of the stack memory. 632 */ 633 #ifdef VERBOSE_INIT_ARM 634 printf("init subsystems: stacks "); 635 #endif 636 637 set_stackptr(PSR_IRQ32_MODE, 638 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 639 set_stackptr(PSR_ABT32_MODE, 640 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 641 set_stackptr(PSR_UND32_MODE, 642 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 643 #ifdef PMAP_DEBUG 644 if (pmap_debug_level >= 0) 645 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 646 kernelstack.pv_pa); 647 #endif /* PMAP_DEBUG */ 648 649 /* 650 * Well we should set a data abort handler. 651 * Once things get going this will change as we will need a proper 652 * handler. Until then we will use a handler that just panics but 653 * tells us why. 654 * Initialisation of the vetcors will just panic on a data abort. 655 * This just fills in a slightly better one. 656 */ 657 #ifdef VERBOSE_INIT_ARM 658 printf("vectors "); 659 #endif 660 data_abort_handler_address = (u_int)data_abort_handler; 661 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 662 undefined_handler_address = (u_int)undefinedinstruction_bounce; 663 #ifdef VERBOSE_INIT_ARM 664 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 665 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 666 printf("undefined_handler_address = %08x\n", undefined_handler_address); 667 #endif 668 669 /* Initialise the undefined instruction handlers */ 670 #ifdef VERBOSE_INIT_ARM 671 printf("undefined "); 672 #endif 673 undefined_init(); 674 675 /* Load memory into UVM. */ 676 #ifdef VERBOSE_INIT_ARM 677 printf("page "); 678 #endif 679 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 680 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 681 atop(physical_freestart), atop(physical_freeend), 682 VM_FREELIST_DEFAULT); 683 684 /* Boot strap pmap telling it where the kernel page table is */ 685 #ifdef VERBOSE_INIT_ARM 686 printf("pmap "); 687 #endif 688 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 689 690 /* Setup the IRQ system */ 691 #ifdef VERBOSE_INIT_ARM 692 printf("irq "); 693 #endif 694 ixp12x0_intr_init(); 695 696 #ifdef VERBOSE_INIT_ARM 697 printf("done.\n"); 698 #endif 699 700 #ifdef VERBOSE_INIT_ARM 701 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 702 physical_freestart, free_pages, free_pages); 703 printf("freemempos=%08lx\n", freemempos); 704 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 705 #endif 706 707 consinit(); 708 #ifdef VERBOSE_INIT_ARM 709 printf("consinit \n"); 710 #endif 711 712 ixdp_ixp12x0_cc_setup(); 713 714 #ifdef VERBOSE_INIT_ARM 715 printf("bootstrap done.\n"); 716 #endif 717 718 #if NKSYMS || defined(DDB) || defined(MODULAR) 719 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 720 #endif 721 722 #ifdef DDB 723 db_machine_init(); 724 if (boothowto & RB_KDB) 725 Debugger(); 726 #endif 727 728 /* We return the new stack pointer address */ 729 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 730 } 731 732 void 733 consinit(void) 734 { 735 static int consinit_called = 0; 736 737 if (consinit_called != 0) 738 return; 739 740 consinit_called = 1; 741 742 pmap_devmap_register(ixm1200_devmap); 743 744 if (ixpcomcnattach(&ixp12x0_bs_tag, 745 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 746 CONSPEED, CONMODE)) 747 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 748 } 749 750 /* 751 * For optimal cache cleaning we need two 16K banks of 752 * virtual address space that NOTHING else will access 753 * and then we alternate the cache cleaning between the 754 * two banks. 755 * The cache cleaning code requires requires 2 banks aligned 756 * on total size boundry so the banks can be alternated by 757 * eorring the size bit (assumes the bank size is a power of 2) 758 */ 759 void 760 ixdp_ixp12x0_cc_setup(void) 761 { 762 int loop; 763 paddr_t kaddr; 764 765 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 766 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 767 pt_entry_t * const ptep = vtopte(ixp12x0_cc_base + loop); 768 const pt_entry_t npte = L2_S_PROTO | kaddr | 769 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 770 l2pte_set(ptep, npte, 0); 771 PTE_SYNC(ptep); 772 } 773 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 774 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 775 } 776