ixm1200_machdep.c revision 1.25
1 /* $NetBSD: ixm1200_machdep.c,v 1.25 2003/05/22 05:47:10 thorpej Exp $ */ 2 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 1.25 2003/05/22 05:47:10 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 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 130 131 /* 132 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 133 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 134 */ 135 #define KERNEL_VM_SIZE 0x0C000000 136 137 /* 138 * Address to call from cpu_reset() to reset the machine. 139 * This is machine architecture dependant as it varies depending 140 * on where the ROM appears when you turn the MMU off. 141 */ 142 143 u_int cpu_reset_address = (u_int) ixp12x0_reset; 144 145 /* 146 * Define the default console speed for the board. 147 */ 148 #ifndef CONMODE 149 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 150 #endif 151 #ifndef CONSPEED 152 #define CONSPEED B38400 153 #endif 154 #ifndef CONADDR 155 #define CONADDR IXPCOM_UART_BASE 156 #endif 157 158 /* Define various stack sizes in pages */ 159 #define IRQ_STACK_SIZE 1 160 #define ABT_STACK_SIZE 1 161 #ifdef IPKDB 162 #define UND_STACK_SIZE 2 163 #else 164 #define UND_STACK_SIZE 1 165 #endif 166 167 BootConfig bootconfig; /* Boot config storage */ 168 char *boot_args = NULL; 169 char *boot_file = NULL; 170 171 vm_offset_t physical_start; 172 vm_offset_t physical_freestart; 173 vm_offset_t physical_freeend; 174 vm_offset_t physical_end; 175 u_int free_pages; 176 vm_offset_t pagetables_start; 177 int physmem = 0; 178 179 /*int debug_flags;*/ 180 #ifndef PMAP_STATIC_L1S 181 int max_processes = 64; /* Default number */ 182 #endif /* !PMAP_STATIC_L1S */ 183 184 /* Physical and virtual addresses for some global pages */ 185 pv_addr_t systempage; 186 pv_addr_t irqstack; 187 pv_addr_t undstack; 188 pv_addr_t abtstack; 189 pv_addr_t kernelstack; 190 191 vm_offset_t msgbufphys; 192 193 extern u_int data_abort_handler_address; 194 extern u_int prefetch_abort_handler_address; 195 extern u_int undefined_handler_address; 196 extern int end; 197 198 #ifdef PMAP_DEBUG 199 extern int pmap_debug_level; 200 #endif /* PMAP_DEBUG */ 201 202 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 203 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 204 #define KERNEL_PT_KERNEL_NUM 2 205 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 206 /* Page table for mapping IO */ 207 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 208 /* Page tables for mapping kernel VM */ 209 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 210 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 211 212 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 213 214 struct user *proc0paddr; 215 216 #ifdef CPU_IXP12X0 217 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 218 extern unsigned int ixp12x0_cache_clean_addr; 219 extern unsigned int ixp12x0_cache_clean_size; 220 static vaddr_t ixp12x0_cc_base; 221 #endif /* CPU_IXP12X0 */ 222 223 /* Prototypes */ 224 225 void consinit __P((void)); 226 u_int cpu_get_control __P((void)); 227 228 void ixdp_ixp12x0_cc_setup(void); 229 230 extern int db_trapper(u_int, u_int, trapframe_t *, int); 231 232 /* 233 * void cpu_reboot(int howto, char *bootstr) 234 * 235 * Reboots the system 236 * 237 * Deal with any syncing, unmounting, dumping and shutdown hooks, 238 * then reset the CPU. 239 */ 240 241 void 242 cpu_reboot(howto, bootstr) 243 int howto; 244 char *bootstr; 245 { 246 /* 247 * If we are still cold then hit the air brakes 248 * and crash to earth fast 249 */ 250 if (cold) { 251 doshutdownhooks(); 252 printf("Halted while still in the ICE age.\n"); 253 printf("The operating system has halted.\n"); 254 printf("Please press any key to reboot.\n\n"); 255 cngetc(); 256 printf("rebooting...\n"); 257 ixp12x0_reset(); 258 } 259 260 /* Disable console buffering */ 261 cnpollc(1); 262 263 /* 264 * If RB_NOSYNC was not specified sync the discs. 265 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 266 * It looks like syslogd is getting woken up only to find that it cannot 267 * page part of the binary in as the filesystem has been unmounted. 268 */ 269 if (!(howto & RB_NOSYNC)) 270 bootsync(); 271 272 /* Say NO to interrupts */ 273 splhigh(); 274 275 /* Do a dump if requested. */ 276 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 277 dumpsys(); 278 279 /* Run any shutdown hooks */ 280 doshutdownhooks(); 281 282 /* Make sure IRQ's are disabled */ 283 IRQdisable; 284 285 if (howto & RB_HALT) { 286 printf("The operating system has halted.\n"); 287 printf("Please press any key to reboot.\n\n"); 288 cngetc(); 289 } 290 291 printf("rebooting...\n"); 292 293 /* all interrupts are disabled */ 294 disable_interrupts(I32_bit); 295 296 ixp12x0_reset(); 297 298 /* ...and if that didn't work, just croak. */ 299 printf("RESET FAILED!\n"); 300 for (;;); 301 } 302 303 /* 304 * Initial entry point on startup. This gets called before main() is 305 * entered. 306 * It should be responsible for setting up everything that must be 307 * in place when main is called. 308 * This includes 309 * Taking a copy of the boot configuration structure. 310 * Initialising the physical console so characters can be printed. 311 * Setting up page tables for the kernel 312 * Relocating the kernel to the bottom of physical memory 313 */ 314 u_int 315 initarm(void *arg) 316 { 317 int loop; 318 int loop1; 319 u_int kerneldatasize, symbolsize; 320 vaddr_t l1pagetable; 321 vaddr_t freemempos; 322 pv_addr_t kernel_l1pt; 323 #if NKSYMS || defined(DDB) || defined(LKM) 324 Elf_Shdr *sh; 325 #endif 326 327 /* 328 * Since we map v0xf0000000 == p0x90000000, it's possible for 329 * us to initialize the console now. 330 */ 331 consinit(); 332 333 #ifdef VERBOSE_INIT_ARM 334 /* Talk to the user */ 335 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 336 #endif 337 338 /* 339 * Heads up ... Setup the CPU / MMU / TLB functions 340 */ 341 if (set_cpufuncs()) 342 panic("cpu not recognized!"); 343 344 /* XXX overwrite bootconfig to hardcoded values */ 345 bootconfig.dram[0].address = 0xc0000000; 346 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 347 bootconfig.dramblocks = 1; 348 349 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 350 351 symbolsize = 0; 352 353 #ifdef PMAP_DEBUG 354 pmap_debug(-1); 355 #endif 356 357 #if NKSYMS || defined(DDB) || defined(LKM) 358 if (! memcmp(&end, "\177ELF", 4)) { 359 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 360 loop = ((Elf_Ehdr *)&end)->e_shnum; 361 for(; loop; loop--, sh++) 362 if (sh->sh_offset > 0 && 363 (sh->sh_offset + sh->sh_size) > symbolsize) 364 symbolsize = sh->sh_offset + sh->sh_size; 365 } 366 #endif 367 #ifdef VERBOSE_INIT_ARM 368 printf("kernsize=0x%x\n", kerneldatasize); 369 #endif 370 kerneldatasize += symbolsize; 371 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 372 373 /* 374 * Set up the variables that define the availablilty of physcial 375 * memory 376 */ 377 physical_start = bootconfig.dram[0].address; 378 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 379 380 physical_freestart = physical_start 381 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 382 physical_freeend = physical_end; 383 384 physmem = (physical_end - physical_start) / PAGE_SIZE; 385 386 freemempos = 0xc0000000; 387 388 #ifdef VERBOSE_INIT_ARM 389 printf("Allocating page tables\n"); 390 #endif 391 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 392 393 #ifdef VERBOSE_INIT_ARM 394 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 395 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 396 physical_freestart, free_pages, free_pages); 397 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 398 physical_start, physical_end); 399 #endif 400 401 /* Define a macro to simplify memory allocation */ 402 #define valloc_pages(var, np) \ 403 alloc_pages((var).pv_pa, (np)); \ 404 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 405 #define alloc_pages(var, np) \ 406 (var) = freemempos; \ 407 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 408 freemempos += (np) * PAGE_SIZE; 409 410 loop1 = 0; 411 kernel_l1pt.pv_pa = 0; 412 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 413 /* Are we 16KB aligned for an L1 ? */ 414 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 415 && kernel_l1pt.pv_pa == 0) { 416 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 417 } else { 418 valloc_pages(kernel_pt_table[loop1], 419 L2_TABLE_SIZE / PAGE_SIZE); 420 ++loop1; 421 } 422 } 423 424 #ifdef DIAGNOSTIC 425 /* This should never be able to happen but better confirm that. */ 426 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 427 panic("initarm: Failed to align the kernel page directory"); 428 #endif 429 430 /* 431 * Allocate a page for the system page mapped to V0x00000000 432 * This page will just contain the system vectors and can be 433 * shared by all processes. 434 */ 435 alloc_pages(systempage.pv_pa, 1); 436 437 /* Allocate stacks for all modes */ 438 valloc_pages(irqstack, IRQ_STACK_SIZE); 439 valloc_pages(abtstack, ABT_STACK_SIZE); 440 valloc_pages(undstack, UND_STACK_SIZE); 441 valloc_pages(kernelstack, UPAGES); 442 443 #ifdef VERBOSE_INIT_ARM 444 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 445 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 446 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 447 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 448 #endif 449 450 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 451 452 #ifdef CPU_IXP12X0 453 /* 454 * XXX totally stuffed hack to work round problems introduced 455 * in recent versions of the pmap code. Due to the calls used there 456 * we cannot allocate virtual memory during bootstrap. 457 */ 458 for(;;) { 459 alloc_pages(ixp12x0_cc_base, 1); 460 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 461 break; 462 } 463 { 464 vaddr_t dummy; 465 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 466 } 467 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 468 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 469 #endif /* CPU_IXP12X0 */ 470 471 #ifdef VERBOSE_INIT_ARM 472 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 473 #endif 474 475 /* 476 * Now we start construction of the L1 page table 477 * We start by mapping the L2 page tables into the L1. 478 * This means that we can replace L1 mappings later on if necessary 479 */ 480 l1pagetable = kernel_l1pt.pv_pa; 481 482 /* Map the L2 pages tables in the L1 page table */ 483 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 484 &kernel_pt_table[KERNEL_PT_SYS]); 485 486 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 487 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 488 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 489 490 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 491 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 492 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 493 494 /* update the top of the kernel VM */ 495 pmap_curmaxkvaddr = 496 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 497 498 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 499 &kernel_pt_table[KERNEL_PT_IO]); 500 501 #ifdef VERBOSE_INIT_ARM 502 printf("Mapping kernel\n"); 503 #endif 504 505 #if XXX 506 /* Now we fill in the L2 pagetable for the kernel code/data */ 507 { 508 extern char etext[], _end[]; 509 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 510 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 511 u_int logical; 512 513 textsize = (textsize + PGOFSET) & ~PGOFSET; 514 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 515 516 logical = 0x00200000; /* offset of kernel in RAM */ 517 518 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 519 physical_start + logical, textsize, 520 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 521 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 522 physical_start + logical, totalsize - textsize, 523 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 524 } 525 #else 526 { 527 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 528 KERNEL_TEXT_BASE, kerneldatasize, 529 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 530 } 531 #endif 532 533 #ifdef VERBOSE_INIT_ARM 534 printf("Constructing L2 page tables\n"); 535 #endif 536 537 /* Map the stack pages */ 538 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 539 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 540 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 541 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 542 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 543 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 544 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 545 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 546 547 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 548 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 549 550 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 551 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 552 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 553 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 554 } 555 556 /* Map the vector page. */ 557 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 558 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 559 560 #ifdef VERBOSE_INIT_ARM 561 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 562 systempage.pv_pa, vector_page); 563 #endif 564 565 /* 566 * Map the PCI I/O spaces and IXP12x0 registers 567 */ 568 569 ixp12x0_pmap_io_reg(l1pagetable); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("done.\n"); 573 #endif 574 575 /* 576 * Map the Dcache Flush page. 577 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 578 */ 579 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 580 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 581 582 /* 583 * Now we have the real page tables in place so we can switch to them. 584 * Once this is done we will be running with the REAL kernel page 585 * tables. 586 */ 587 588 /* Switch tables */ 589 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 590 setttb(kernel_l1pt.pv_pa); 591 cpu_tlb_flushID(); 592 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 593 594 /* 595 * Moved here from cpu_startup() as data_abort_handler() references 596 * this during init 597 */ 598 proc0paddr = (struct user *)kernelstack.pv_va; 599 lwp0.l_addr = proc0paddr; 600 601 /* 602 * We must now clean the cache again.... 603 * Cleaning may be done by reading new data to displace any 604 * dirty data in the cache. This will have happened in setttb() 605 * but since we are boot strapping the addresses used for the read 606 * may have just been remapped and thus the cache could be out 607 * of sync. A re-clean after the switch will cure this. 608 * After booting there are no gross reloations of the kernel thus 609 * this problem will not occur after initarm(). 610 */ 611 cpu_idcache_wbinv_all(); 612 613 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 614 615 /* 616 * Pages were allocated during the secondary bootstrap for the 617 * stacks for different CPU modes. 618 * We must now set the r13 registers in the different CPU modes to 619 * point to these stacks. 620 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 621 * of the stack memory. 622 */ 623 #ifdef VERBOSE_INIT_ARM 624 printf("init subsystems: stacks "); 625 #endif 626 627 set_stackptr(PSR_IRQ32_MODE, 628 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 629 set_stackptr(PSR_ABT32_MODE, 630 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 631 set_stackptr(PSR_UND32_MODE, 632 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 633 #ifdef PMAP_DEBUG 634 if (pmap_debug_level >= 0) 635 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 636 kernelstack.pv_pa); 637 #endif /* PMAP_DEBUG */ 638 639 /* 640 * Well we should set a data abort handler. 641 * Once things get going this will change as we will need a proper 642 * handler. Until then we will use a handler that just panics but 643 * tells us why. 644 * Initialisation of the vetcors will just panic on a data abort. 645 * This just fills in a slighly better one. 646 */ 647 #ifdef VERBOSE_INIT_ARM 648 printf("vectors "); 649 #endif 650 data_abort_handler_address = (u_int)data_abort_handler; 651 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 652 undefined_handler_address = (u_int)undefinedinstruction_bounce; 653 #ifdef VERBOSE_INIT_ARM 654 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 655 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 656 printf("undefined_handler_address = %08x\n", undefined_handler_address); 657 #endif 658 659 /* Initialise the undefined instruction handlers */ 660 #ifdef VERBOSE_INIT_ARM 661 printf("undefined "); 662 #endif 663 undefined_init(); 664 665 /* Load memory into UVM. */ 666 #ifdef VERBOSE_INIT_ARM 667 printf("page "); 668 #endif 669 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 670 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 671 atop(physical_freestart), atop(physical_freeend), 672 VM_FREELIST_DEFAULT); 673 674 /* Boot strap pmap telling it where the kernel page table is */ 675 #ifdef VERBOSE_INIT_ARM 676 printf("pmap "); 677 #endif 678 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 679 KERNEL_VM_BASE + KERNEL_VM_SIZE); 680 681 /* Setup the IRQ system */ 682 #ifdef VERBOSE_INIT_ARM 683 printf("irq "); 684 #endif 685 ixp12x0_intr_init(); 686 687 #ifdef VERBOSE_INIT_ARM 688 printf("done.\n"); 689 #endif 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 693 physical_freestart, free_pages, free_pages); 694 printf("freemempos=%08lx\n", freemempos); 695 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 696 #endif 697 698 consinit(); 699 #ifdef VERBOSE_INIT_ARM 700 printf("consinit \n"); 701 #endif 702 703 ixdp_ixp12x0_cc_setup(); 704 705 #ifdef VERBOSE_INIT_ARM 706 printf("bootstrap done.\n"); 707 #endif 708 709 #ifdef IPKDB 710 /* Initialise ipkdb */ 711 ipkdb_init(); 712 if (boothowto & RB_KDB) 713 ipkdb_connect(0); 714 #endif /* NIPKDB */ 715 716 #if NKSYMS || defined(DDB) || defined(LKM) 717 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 718 #endif 719 720 #ifdef DDB 721 { 722 static struct undefined_handler uh; 723 724 uh.uh_handler = db_trapper; 725 install_coproc_handler_static(0, &uh); 726 } 727 728 if (boothowto & RB_KDB) 729 Debugger(); 730 #endif 731 732 /* We return the new stack pointer address */ 733 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 734 } 735 736 void 737 consinit(void) 738 { 739 extern struct bus_space ixpsip_bs_tag; 740 static int consinit_called = 0; 741 742 if (consinit_called != 0) 743 return; 744 745 consinit_called = 1; 746 747 if (ixpcomcnattach(&ixpsip_bs_tag, 748 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 749 CONSPEED, CONMODE)) 750 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 751 } 752 753 /* 754 * For optimal cache cleaning we need two 16K banks of 755 * virtual address space that NOTHING else will access 756 * and then we alternate the cache cleaning between the 757 * two banks. 758 * The cache cleaning code requires requires 2 banks aligned 759 * on total size boundry so the banks can be alternated by 760 * eorring the size bit (assumes the bank size is a power of 2) 761 */ 762 void 763 ixdp_ixp12x0_cc_setup(void) 764 { 765 int loop; 766 paddr_t kaddr; 767 pt_entry_t *pte; 768 769 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 770 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 771 pte = vtopte(ixp12x0_cc_base + loop); 772 *pte = L2_S_PROTO | kaddr | 773 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 774 PTE_SYNC(pte); 775 } 776 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 777 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 778 } 779
Indexes created Thu Oct 02 14:10:14 GMT 2025