ixm1200_machdep.c revision 1.20
1 /* $NetBSD: ixm1200_machdep.c,v 1.20 2003/05/03 18:25:33 thorpej Exp $ */ 2 #undef DEBUG_BEFOREMMU 3 /* 4 * Copyright (c) 2002, 2003 5 * Ichiro FUKUHARA <ichiro (at) 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Ichiro FUKUHARA. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 /* 36 * Copyright (c) 1997,1998 Mark Brinicombe. 37 * Copyright (c) 1997,1998 Causality Limited. 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by Mark Brinicombe 51 * for the NetBSD Project. 52 * 4. The name of the company nor the name of the author may be used to 53 * endorse or promote products derived from this software without specific 54 * prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 57 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 58 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 60 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 61 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 66 * SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.20 2003/05/03 18:25:33 thorpej Exp $"); 71 72 #include "opt_ddb.h" 73 #include "opt_pmap_debug.h" 74 75 #include <sys/param.h> 76 #include <sys/device.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/exec.h> 80 #include <sys/proc.h> 81 #include <sys/msgbuf.h> 82 #include <sys/reboot.h> 83 #include <sys/termios.h> 84 #include <sys/ksyms.h> 85 86 #include <uvm/uvm_extern.h> 87 88 #include <dev/cons.h> 89 90 #include "ksyms.h" 91 92 #if NKSYMS || defined(DDB) || defined(LKM) 93 #include <machine/db_machdep.h> 94 #include <ddb/db_sym.h> 95 #include <ddb/db_extern.h> 96 #ifndef DB_ELFSIZE 97 #error Must define DB_ELFSIZE! 98 #endif 99 #define ELFSIZE DB_ELFSIZE 100 #include <sys/exec_elf.h> 101 #endif 102 103 #include <machine/bootconfig.h> 104 #include <machine/bus.h> 105 #include <machine/cpu.h> 106 #include <machine/frame.h> 107 #include <arm/undefined.h> 108 109 #include <arm/arm32/machdep.h> 110 111 #include <arm/ixp12x0/ixp12x0reg.h> 112 #include <arm/ixp12x0/ixp12x0var.h> 113 #include <arm/ixp12x0/ixp12x0_comreg.h> 114 #include <arm/ixp12x0/ixp12x0_comvar.h> 115 #include <arm/ixp12x0/ixp12x0_pcireg.h> 116 117 #include <evbarm/ixm1200/ixm1200reg.h> 118 #include <evbarm/ixm1200/ixm1200var.h> 119 120 #include "opt_ipkdb.h" 121 122 /* XXX for consinit related hacks */ 123 #include <sys/conf.h> 124 125 void ixp12x0_reset(void) __attribute__((noreturn)); 126 127 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 128 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependant as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 */ 135 136 u_int cpu_reset_address = (u_int) ixp12x0_reset; 137 138 /* 139 * Define the default console speed for the board. 140 */ 141 #ifndef CONMODE 142 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 143 #endif 144 #ifndef CONSPEED 145 #define CONSPEED B38400 146 #endif 147 #ifndef CONADDR 148 #define CONADDR IXPCOM_UART_BASE 149 #endif 150 151 cons_decl(com); 152 cons_decl(ixpcom); 153 154 struct consdev constab[] = { 155 #if (NIXPCOM > 0) 156 cons_init(ixpcom), 157 #endif 158 { 0 }, 159 }; 160 161 /* Define various stack sizes in pages */ 162 #define IRQ_STACK_SIZE 1 163 #define ABT_STACK_SIZE 1 164 #ifdef IPKDB 165 #define UND_STACK_SIZE 2 166 #else 167 #define UND_STACK_SIZE 1 168 #endif 169 170 BootConfig bootconfig; /* Boot config storage */ 171 char *boot_args = NULL; 172 char *boot_file = NULL; 173 174 vm_offset_t physical_start; 175 vm_offset_t physical_freestart; 176 vm_offset_t physical_freeend; 177 vm_offset_t physical_end; 178 u_int free_pages; 179 vm_offset_t pagetables_start; 180 int physmem = 0; 181 182 /*int debug_flags;*/ 183 #ifndef PMAP_STATIC_L1S 184 int max_processes = 64; /* Default number */ 185 #endif /* !PMAP_STATIC_L1S */ 186 187 /* Physical and virtual addresses for some global pages */ 188 pv_addr_t systempage; 189 pv_addr_t irqstack; 190 pv_addr_t undstack; 191 pv_addr_t abtstack; 192 pv_addr_t kernelstack; 193 194 vm_offset_t msgbufphys; 195 196 extern u_int data_abort_handler_address; 197 extern u_int prefetch_abort_handler_address; 198 extern u_int undefined_handler_address; 199 extern int end; 200 201 #ifdef PMAP_DEBUG 202 extern int pmap_debug_level; 203 #endif /* PMAP_DEBUG */ 204 205 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 206 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 207 #define KERNEL_PT_KERNEL_NUM 2 208 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 209 /* Page table for mapping IO */ 210 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 211 /* Page tables for mapping kernel VM */ 212 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 213 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 214 215 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 216 217 struct user *proc0paddr; 218 219 #ifdef CPU_IXP12X0 220 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 221 extern unsigned int ixp12x0_cache_clean_addr; 222 extern unsigned int ixp12x0_cache_clean_size; 223 static vaddr_t ixp12x0_cc_base; 224 #endif /* CPU_IXP12X0 */ 225 226 /* Prototypes */ 227 228 void consinit __P((void)); 229 u_int cpu_get_control __P((void)); 230 231 void ixdp_ixp12x0_cc_setup(void); 232 233 #ifdef DEBUG_BEFOREMMU 234 static void fakecninit(); 235 #endif 236 237 extern int db_trapper(u_int, u_int, trapframe_t *, int); 238 239 /* 240 * void cpu_reboot(int howto, char *bootstr) 241 * 242 * Reboots the system 243 * 244 * Deal with any syncing, unmounting, dumping and shutdown hooks, 245 * then reset the CPU. 246 */ 247 248 void 249 cpu_reboot(howto, bootstr) 250 int howto; 251 char *bootstr; 252 { 253 /* 254 * If we are still cold then hit the air brakes 255 * and crash to earth fast 256 */ 257 if (cold) { 258 doshutdownhooks(); 259 printf("Halted while still in the ICE age.\n"); 260 printf("The operating system has halted.\n"); 261 printf("Please press any key to reboot.\n\n"); 262 cngetc(); 263 printf("rebooting...\n"); 264 ixp12x0_reset(); 265 } 266 267 /* Disable console buffering */ 268 cnpollc(1); 269 270 /* 271 * If RB_NOSYNC was not specified sync the discs. 272 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 273 * It looks like syslogd is getting woken up only to find that it cannot 274 * page part of the binary in as the filesystem has been unmounted. 275 */ 276 if (!(howto & RB_NOSYNC)) 277 bootsync(); 278 279 /* Say NO to interrupts */ 280 splhigh(); 281 282 /* Do a dump if requested. */ 283 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 284 dumpsys(); 285 286 /* Run any shutdown hooks */ 287 doshutdownhooks(); 288 289 /* Make sure IRQ's are disabled */ 290 IRQdisable; 291 292 if (howto & RB_HALT) { 293 printf("The operating system has halted.\n"); 294 printf("Please press any key to reboot.\n\n"); 295 cngetc(); 296 } 297 298 printf("rebooting...\n"); 299 300 /* all interrupts are disabled */ 301 disable_interrupts(I32_bit); 302 303 ixp12x0_reset(); 304 305 /* ...and if that didn't work, just croak. */ 306 printf("RESET FAILED!\n"); 307 for (;;); 308 } 309 310 /* 311 * Initial entry point on startup. This gets called before main() is 312 * entered. 313 * It should be responsible for setting up everything that must be 314 * in place when main is called. 315 * This includes 316 * Taking a copy of the boot configuration structure. 317 * Initialising the physical console so characters can be printed. 318 * Setting up page tables for the kernel 319 * Relocating the kernel to the bottom of physical memory 320 */ 321 u_int 322 initarm(void *arg) 323 { 324 int loop; 325 int loop1; 326 u_int kerneldatasize, symbolsize; 327 vaddr_t l1pagetable; 328 vaddr_t freemempos; 329 pv_addr_t kernel_l1pt; 330 #if NKSYMS || defined(DDB) || defined(LKM) 331 Elf_Shdr *sh; 332 #endif 333 334 #ifdef DEBUG_BEFOREMMU 335 /* 336 * At this point, we cannot call real consinit(). 337 * Just call a faked up version of consinit(), which does the thing 338 * with MMU disabled. 339 */ 340 fakecninit(); 341 #endif 342 /* 343 * Since we map v0xf0000000 == p0x90000000, it's possible for 344 * us to initialize the console now. 345 */ 346 consinit(); 347 348 /* Talk to the user */ 349 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 350 351 /* 352 * Heads up ... Setup the CPU / MMU / TLB functions 353 */ 354 if (set_cpufuncs()) 355 panic("cpu not recognized!"); 356 357 /* XXX overwrite bootconfig to hardcoded values */ 358 bootconfig.dram[0].address = 0xc0000000; 359 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 360 bootconfig.dramblocks = 1; 361 362 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 363 364 symbolsize = 0; 365 366 #ifdef PMAP_DEBUG 367 pmap_debug(-1); 368 #endif 369 370 #if NKSYMS || defined(DDB) || defined(LKM) 371 if (! memcmp(&end, "\177ELF", 4)) { 372 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 373 loop = ((Elf_Ehdr *)&end)->e_shnum; 374 for(; loop; loop--, sh++) 375 if (sh->sh_offset > 0 && 376 (sh->sh_offset + sh->sh_size) > symbolsize) 377 symbolsize = sh->sh_offset + sh->sh_size; 378 } 379 #endif 380 printf("kernsize=0x%x\n", kerneldatasize); 381 kerneldatasize += symbolsize; 382 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 383 384 /* 385 * Set up the variables that define the availablilty of physcial 386 * memory 387 */ 388 physical_start = bootconfig.dram[0].address; 389 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 390 391 physical_freestart = physical_start 392 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 393 physical_freeend = physical_end; 394 395 physmem = (physical_end - physical_start) / PAGE_SIZE; 396 397 freemempos = 0xc0000000; 398 399 #ifdef VERBOSE_INIT_ARM 400 printf("Allocating page tables\n"); 401 #endif 402 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 403 404 #ifdef VERBOSE_INIT_ARM 405 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 406 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 407 physical_freestart, free_pages, free_pages); 408 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 409 physical_start, physical_end); 410 #endif 411 412 /* Define a macro to simplify memory allocation */ 413 #define valloc_pages(var, np) \ 414 alloc_pages((var).pv_pa, (np)); \ 415 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 416 #define alloc_pages(var, np) \ 417 (var) = freemempos; \ 418 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 419 freemempos += (np) * PAGE_SIZE; 420 421 loop1 = 0; 422 kernel_l1pt.pv_pa = 0; 423 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 424 /* Are we 16KB aligned for an L1 ? */ 425 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 426 && kernel_l1pt.pv_pa == 0) { 427 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 428 } else { 429 valloc_pages(kernel_pt_table[loop1], 430 L2_TABLE_SIZE / PAGE_SIZE); 431 ++loop1; 432 } 433 } 434 435 #ifdef DIAGNOSTIC 436 /* This should never be able to happen but better confirm that. */ 437 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 438 panic("initarm: Failed to align the kernel page directory"); 439 #endif 440 441 /* 442 * Allocate a page for the system page mapped to V0x00000000 443 * This page will just contain the system vectors and can be 444 * shared by all processes. 445 */ 446 alloc_pages(systempage.pv_pa, 1); 447 448 /* Allocate stacks for all modes */ 449 valloc_pages(irqstack, IRQ_STACK_SIZE); 450 valloc_pages(abtstack, ABT_STACK_SIZE); 451 valloc_pages(undstack, UND_STACK_SIZE); 452 valloc_pages(kernelstack, UPAGES); 453 454 #ifdef VERBOSE_INIT_ARM 455 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 456 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 457 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 458 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 459 #endif 460 461 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 462 463 #ifdef CPU_IXP12X0 464 /* 465 * XXX totally stuffed hack to work round problems introduced 466 * in recent versions of the pmap code. Due to the calls used there 467 * we cannot allocate virtual memory during bootstrap. 468 */ 469 for(;;) { 470 alloc_pages(ixp12x0_cc_base, 1); 471 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 472 break; 473 } 474 { 475 vaddr_t dummy; 476 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 477 } 478 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 479 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 480 #endif /* CPU_IXP12X0 */ 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 484 #endif 485 486 /* 487 * Now we start construction of the L1 page table 488 * We start by mapping the L2 page tables into the L1. 489 * This means that we can replace L1 mappings later on if necessary 490 */ 491 l1pagetable = kernel_l1pt.pv_pa; 492 493 /* Map the L2 pages tables in the L1 page table */ 494 pmap_link_l2pt(l1pagetable, 0x00000000, 495 &kernel_pt_table[KERNEL_PT_SYS]); 496 497 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 498 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 499 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 500 501 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 502 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 503 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 504 505 /* update the top of the kernel VM */ 506 pmap_curmaxkvaddr = 507 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 508 509 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 510 &kernel_pt_table[KERNEL_PT_IO]); 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("Mapping kernel\n"); 514 #endif 515 516 #if XXX 517 /* Now we fill in the L2 pagetable for the kernel code/data */ 518 { 519 extern char etext[], _end[]; 520 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 521 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 522 u_int logical; 523 524 textsize = (textsize + PGOFSET) & ~PGOFSET; 525 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 526 527 logical = 0x00200000; /* offset of kernel in RAM */ 528 529 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 530 physical_start + logical, textsize, 531 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 532 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 533 physical_start + logical, totalsize - textsize, 534 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 535 } 536 #else 537 { 538 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 539 KERNEL_TEXT_BASE, kerneldatasize, 540 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 541 } 542 #endif 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("Constructing L2 page tables\n"); 546 #endif 547 548 /* Map the stack pages */ 549 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 550 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 551 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 552 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 554 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 555 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 556 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 557 558 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 559 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 560 561 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 562 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 563 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 564 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 565 } 566 567 /* Map the vector page. */ 568 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 573 systempage.pv_pa, vector_page); 574 #endif 575 576 /* 577 * Map the PCI I/O spaces and IXP12x0 registers 578 */ 579 580 ixp12x0_pmap_io_reg(l1pagetable); 581 582 printf("done.\n"); 583 584 /* 585 * Map the Dcache Flush page. 586 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 587 */ 588 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 589 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 590 591 /* 592 * Now we have the real page tables in place so we can switch to them. 593 * Once this is done we will be running with the REAL kernel page 594 * tables. 595 */ 596 597 /* Switch tables */ 598 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 599 setttb(kernel_l1pt.pv_pa); 600 cpu_tlb_flushID(); 601 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 602 603 /* 604 * Moved here from cpu_startup() as data_abort_handler() references 605 * this during init 606 */ 607 proc0paddr = (struct user *)kernelstack.pv_va; 608 lwp0.l_addr = proc0paddr; 609 610 /* 611 * We must now clean the cache again.... 612 * Cleaning may be done by reading new data to displace any 613 * dirty data in the cache. This will have happened in setttb() 614 * but since we are boot strapping the addresses used for the read 615 * may have just been remapped and thus the cache could be out 616 * of sync. A re-clean after the switch will cure this. 617 * After booting there are no gross reloations of the kernel thus 618 * this problem will not occur after initarm(). 619 */ 620 cpu_idcache_wbinv_all(); 621 622 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 623 624 /* 625 * Pages were allocated during the secondary bootstrap for the 626 * stacks for different CPU modes. 627 * We must now set the r13 registers in the different CPU modes to 628 * point to these stacks. 629 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 630 * of the stack memory. 631 */ 632 printf("init subsystems: stacks "); 633 634 set_stackptr(PSR_IRQ32_MODE, 635 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 636 set_stackptr(PSR_ABT32_MODE, 637 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 638 set_stackptr(PSR_UND32_MODE, 639 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 640 #ifdef PMAP_DEBUG 641 if (pmap_debug_level >= 0) 642 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 643 kernelstack.pv_pa); 644 #endif /* PMAP_DEBUG */ 645 646 /* 647 * Well we should set a data abort handler. 648 * Once things get going this will change as we will need a proper 649 * handler. Until then we will use a handler that just panics but 650 * tells us why. 651 * Initialisation of the vetcors will just panic on a data abort. 652 * This just fills in a slighly better one. 653 */ 654 printf("vectors "); 655 data_abort_handler_address = (u_int)data_abort_handler; 656 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 657 undefined_handler_address = (u_int)undefinedinstruction_bounce; 658 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 659 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 660 printf("undefined_handler_address = %08x\n", undefined_handler_address); 661 662 /* Initialise the undefined instruction handlers */ 663 printf("undefined "); 664 undefined_init(); 665 666 /* Load memory into UVM. */ 667 printf("page "); 668 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 669 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 670 atop(physical_freestart), atop(physical_freeend), 671 VM_FREELIST_DEFAULT); 672 673 /* Boot strap pmap telling it where the kernel page table is */ 674 printf("pmap "); 675 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 676 KERNEL_VM_BASE + KERNEL_VM_SIZE); 677 678 /* Setup the IRQ system */ 679 printf("irq "); 680 ixp12x0_intr_init(); 681 printf("done.\n"); 682 683 #ifdef VERBOSE_INIT_ARM 684 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 685 physical_freestart, free_pages, free_pages); 686 printf("freemempos=%08lx\n", freemempos); 687 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 688 #endif 689 690 consinit(); 691 printf("consinit \n"); 692 693 ixdp_ixp12x0_cc_setup(); 694 695 printf("bootstrap done.\n"); 696 697 #ifdef IPKDB 698 /* Initialise ipkdb */ 699 ipkdb_init(); 700 if (boothowto & RB_KDB) 701 ipkdb_connect(0); 702 #endif /* NIPKDB */ 703 704 #if NKSYMS || defined(DDB) || defined(LKM) 705 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 706 #endif 707 708 #ifdef DDB 709 { 710 static struct undefined_handler uh; 711 712 uh.uh_handler = db_trapper; 713 install_coproc_handler_static(0, &uh); 714 } 715 716 if (boothowto & RB_KDB) 717 Debugger(); 718 #endif 719 720 /* We return the new stack pointer address */ 721 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 722 } 723 724 void 725 consinit(void) 726 { 727 extern struct bus_space ixpsip_bs_tag; 728 static int consinit_called = 0; 729 730 if (consinit_called != 0) 731 return; 732 733 consinit_called = 1; 734 735 if (ixpcomcnattach(&ixpsip_bs_tag, 736 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 737 CONSPEED, CONMODE)) 738 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 739 } 740 741 #ifdef DEBUG_BEFOREMMU 742 cons_decl(ixpcom); 743 void 744 fakecninit() 745 { 746 static struct consdev fakecntab = cons_init(ixpcom); 747 cn_tab = &fakecntab; 748 749 (*cn_tab->cn_init)(0); 750 cn_tab->cn_pri = CN_REMOTE; 751 } 752 #endif 753 754 /* 755 * For optimal cache cleaning we need two 16K banks of 756 * virtual address space that NOTHING else will access 757 * and then we alternate the cache cleaning between the 758 * two banks. 759 * The cache cleaning code requires requires 2 banks aligned 760 * on total size boundry so the banks can be alternated by 761 * eorring the size bit (assumes the bank size is a power of 2) 762 */ 763 void 764 ixdp_ixp12x0_cc_setup(void) 765 { 766 int loop; 767 paddr_t kaddr; 768 pt_entry_t *pte; 769 770 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 771 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 772 pte = vtopte(ixp12x0_cc_base + loop); 773 *pte = L2_S_PROTO | kaddr | 774 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 775 PTE_SYNC(pte); 776 } 777 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 778 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 779 } 780
Indexes created Thu Oct 02 14:10:14 GMT 2025