ixm1200_machdep.c revision 1.23
1 /* $NetBSD: ixm1200_machdep.c,v 1.23 2003/05/17 23:47:01 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 1.23 2003/05/17 23:47:01 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 /* Define various stack sizes in pages */ 152 #define IRQ_STACK_SIZE 1 153 #define ABT_STACK_SIZE 1 154 #ifdef IPKDB 155 #define UND_STACK_SIZE 2 156 #else 157 #define UND_STACK_SIZE 1 158 #endif 159 160 BootConfig bootconfig; /* Boot config storage */ 161 char *boot_args = NULL; 162 char *boot_file = NULL; 163 164 vm_offset_t physical_start; 165 vm_offset_t physical_freestart; 166 vm_offset_t physical_freeend; 167 vm_offset_t physical_end; 168 u_int free_pages; 169 vm_offset_t pagetables_start; 170 int physmem = 0; 171 172 /*int debug_flags;*/ 173 #ifndef PMAP_STATIC_L1S 174 int max_processes = 64; /* Default number */ 175 #endif /* !PMAP_STATIC_L1S */ 176 177 /* Physical and virtual addresses for some global pages */ 178 pv_addr_t systempage; 179 pv_addr_t irqstack; 180 pv_addr_t undstack; 181 pv_addr_t abtstack; 182 pv_addr_t kernelstack; 183 184 vm_offset_t msgbufphys; 185 186 extern u_int data_abort_handler_address; 187 extern u_int prefetch_abort_handler_address; 188 extern u_int undefined_handler_address; 189 extern int end; 190 191 #ifdef PMAP_DEBUG 192 extern int pmap_debug_level; 193 #endif /* PMAP_DEBUG */ 194 195 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 196 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 197 #define KERNEL_PT_KERNEL_NUM 2 198 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 199 /* Page table for mapping IO */ 200 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 201 /* Page tables for mapping kernel VM */ 202 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 203 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 204 205 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 206 207 struct user *proc0paddr; 208 209 #ifdef CPU_IXP12X0 210 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 211 extern unsigned int ixp12x0_cache_clean_addr; 212 extern unsigned int ixp12x0_cache_clean_size; 213 static vaddr_t ixp12x0_cc_base; 214 #endif /* CPU_IXP12X0 */ 215 216 /* Prototypes */ 217 218 void consinit __P((void)); 219 u_int cpu_get_control __P((void)); 220 221 void ixdp_ixp12x0_cc_setup(void); 222 223 extern int db_trapper(u_int, u_int, trapframe_t *, int); 224 225 /* 226 * void cpu_reboot(int howto, char *bootstr) 227 * 228 * Reboots the system 229 * 230 * Deal with any syncing, unmounting, dumping and shutdown hooks, 231 * then reset the CPU. 232 */ 233 234 void 235 cpu_reboot(howto, bootstr) 236 int howto; 237 char *bootstr; 238 { 239 /* 240 * If we are still cold then hit the air brakes 241 * and crash to earth fast 242 */ 243 if (cold) { 244 doshutdownhooks(); 245 printf("Halted while still in the ICE age.\n"); 246 printf("The operating system has halted.\n"); 247 printf("Please press any key to reboot.\n\n"); 248 cngetc(); 249 printf("rebooting...\n"); 250 ixp12x0_reset(); 251 } 252 253 /* Disable console buffering */ 254 cnpollc(1); 255 256 /* 257 * If RB_NOSYNC was not specified sync the discs. 258 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 259 * It looks like syslogd is getting woken up only to find that it cannot 260 * page part of the binary in as the filesystem has been unmounted. 261 */ 262 if (!(howto & RB_NOSYNC)) 263 bootsync(); 264 265 /* Say NO to interrupts */ 266 splhigh(); 267 268 /* Do a dump if requested. */ 269 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 270 dumpsys(); 271 272 /* Run any shutdown hooks */ 273 doshutdownhooks(); 274 275 /* Make sure IRQ's are disabled */ 276 IRQdisable; 277 278 if (howto & RB_HALT) { 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 } 283 284 printf("rebooting...\n"); 285 286 /* all interrupts are disabled */ 287 disable_interrupts(I32_bit); 288 289 ixp12x0_reset(); 290 291 /* ...and if that didn't work, just croak. */ 292 printf("RESET FAILED!\n"); 293 for (;;); 294 } 295 296 /* 297 * Initial entry point on startup. This gets called before main() is 298 * entered. 299 * It should be responsible for setting up everything that must be 300 * in place when main is called. 301 * This includes 302 * Taking a copy of the boot configuration structure. 303 * Initialising the physical console so characters can be printed. 304 * Setting up page tables for the kernel 305 * Relocating the kernel to the bottom of physical memory 306 */ 307 u_int 308 initarm(void *arg) 309 { 310 int loop; 311 int loop1; 312 u_int kerneldatasize, symbolsize; 313 vaddr_t l1pagetable; 314 vaddr_t freemempos; 315 pv_addr_t kernel_l1pt; 316 #if NKSYMS || defined(DDB) || defined(LKM) 317 Elf_Shdr *sh; 318 #endif 319 320 /* 321 * Since we map v0xf0000000 == p0x90000000, it's possible for 322 * us to initialize the console now. 323 */ 324 consinit(); 325 326 #ifdef VERBOSE_INIT_ARM 327 /* Talk to the user */ 328 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 329 #endif 330 331 /* 332 * Heads up ... Setup the CPU / MMU / TLB functions 333 */ 334 if (set_cpufuncs()) 335 panic("cpu not recognized!"); 336 337 /* XXX overwrite bootconfig to hardcoded values */ 338 bootconfig.dram[0].address = 0xc0000000; 339 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 340 bootconfig.dramblocks = 1; 341 342 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 343 344 symbolsize = 0; 345 346 #ifdef PMAP_DEBUG 347 pmap_debug(-1); 348 #endif 349 350 #if NKSYMS || defined(DDB) || defined(LKM) 351 if (! memcmp(&end, "\177ELF", 4)) { 352 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 353 loop = ((Elf_Ehdr *)&end)->e_shnum; 354 for(; loop; loop--, sh++) 355 if (sh->sh_offset > 0 && 356 (sh->sh_offset + sh->sh_size) > symbolsize) 357 symbolsize = sh->sh_offset + sh->sh_size; 358 } 359 #endif 360 #ifdef VERBOSE_INIT_ARM 361 printf("kernsize=0x%x\n", kerneldatasize); 362 #endif 363 kerneldatasize += symbolsize; 364 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 365 366 /* 367 * Set up the variables that define the availablilty of physcial 368 * memory 369 */ 370 physical_start = bootconfig.dram[0].address; 371 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 372 373 physical_freestart = physical_start 374 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 375 physical_freeend = physical_end; 376 377 physmem = (physical_end - physical_start) / PAGE_SIZE; 378 379 freemempos = 0xc0000000; 380 381 #ifdef VERBOSE_INIT_ARM 382 printf("Allocating page tables\n"); 383 #endif 384 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 385 386 #ifdef VERBOSE_INIT_ARM 387 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 388 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 389 physical_freestart, free_pages, free_pages); 390 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 391 physical_start, physical_end); 392 #endif 393 394 /* Define a macro to simplify memory allocation */ 395 #define valloc_pages(var, np) \ 396 alloc_pages((var).pv_pa, (np)); \ 397 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 398 #define alloc_pages(var, np) \ 399 (var) = freemempos; \ 400 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 401 freemempos += (np) * PAGE_SIZE; 402 403 loop1 = 0; 404 kernel_l1pt.pv_pa = 0; 405 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 406 /* Are we 16KB aligned for an L1 ? */ 407 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 408 && kernel_l1pt.pv_pa == 0) { 409 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 410 } else { 411 valloc_pages(kernel_pt_table[loop1], 412 L2_TABLE_SIZE / PAGE_SIZE); 413 ++loop1; 414 } 415 } 416 417 #ifdef DIAGNOSTIC 418 /* This should never be able to happen but better confirm that. */ 419 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 420 panic("initarm: Failed to align the kernel page directory"); 421 #endif 422 423 /* 424 * Allocate a page for the system page mapped to V0x00000000 425 * This page will just contain the system vectors and can be 426 * shared by all processes. 427 */ 428 alloc_pages(systempage.pv_pa, 1); 429 430 /* Allocate stacks for all modes */ 431 valloc_pages(irqstack, IRQ_STACK_SIZE); 432 valloc_pages(abtstack, ABT_STACK_SIZE); 433 valloc_pages(undstack, UND_STACK_SIZE); 434 valloc_pages(kernelstack, UPAGES); 435 436 #ifdef VERBOSE_INIT_ARM 437 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 438 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 439 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 440 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 441 #endif 442 443 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 444 445 #ifdef CPU_IXP12X0 446 /* 447 * XXX totally stuffed hack to work round problems introduced 448 * in recent versions of the pmap code. Due to the calls used there 449 * we cannot allocate virtual memory during bootstrap. 450 */ 451 for(;;) { 452 alloc_pages(ixp12x0_cc_base, 1); 453 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 454 break; 455 } 456 { 457 vaddr_t dummy; 458 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 459 } 460 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 461 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 462 #endif /* CPU_IXP12X0 */ 463 464 #ifdef VERBOSE_INIT_ARM 465 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 466 #endif 467 468 /* 469 * Now we start construction of the L1 page table 470 * We start by mapping the L2 page tables into the L1. 471 * This means that we can replace L1 mappings later on if necessary 472 */ 473 l1pagetable = kernel_l1pt.pv_pa; 474 475 /* Map the L2 pages tables in the L1 page table */ 476 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 477 &kernel_pt_table[KERNEL_PT_SYS]); 478 479 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 480 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 481 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 482 483 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 484 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 485 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 486 487 /* update the top of the kernel VM */ 488 pmap_curmaxkvaddr = 489 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 490 491 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 492 &kernel_pt_table[KERNEL_PT_IO]); 493 494 #ifdef VERBOSE_INIT_ARM 495 printf("Mapping kernel\n"); 496 #endif 497 498 #if XXX 499 /* Now we fill in the L2 pagetable for the kernel code/data */ 500 { 501 extern char etext[], _end[]; 502 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 503 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 504 u_int logical; 505 506 textsize = (textsize + PGOFSET) & ~PGOFSET; 507 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 508 509 logical = 0x00200000; /* offset of kernel in RAM */ 510 511 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 512 physical_start + logical, textsize, 513 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 514 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 515 physical_start + logical, totalsize - textsize, 516 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 517 } 518 #else 519 { 520 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 521 KERNEL_TEXT_BASE, kerneldatasize, 522 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 523 } 524 #endif 525 526 #ifdef VERBOSE_INIT_ARM 527 printf("Constructing L2 page tables\n"); 528 #endif 529 530 /* Map the stack pages */ 531 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 532 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 533 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 534 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 535 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 536 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 537 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 538 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 539 540 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 541 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 542 543 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 544 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 545 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 546 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 547 } 548 549 /* Map the vector page. */ 550 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 551 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 552 553 #ifdef VERBOSE_INIT_ARM 554 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 555 systempage.pv_pa, vector_page); 556 #endif 557 558 /* 559 * Map the PCI I/O spaces and IXP12x0 registers 560 */ 561 562 ixp12x0_pmap_io_reg(l1pagetable); 563 564 #ifdef VERBOSE_INIT_ARM 565 printf("done.\n"); 566 #endif 567 568 /* 569 * Map the Dcache Flush page. 570 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 571 */ 572 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 573 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 574 575 /* 576 * Now we have the real page tables in place so we can switch to them. 577 * Once this is done we will be running with the REAL kernel page 578 * tables. 579 */ 580 581 /* Switch tables */ 582 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 583 setttb(kernel_l1pt.pv_pa); 584 cpu_tlb_flushID(); 585 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 586 587 /* 588 * Moved here from cpu_startup() as data_abort_handler() references 589 * this during init 590 */ 591 proc0paddr = (struct user *)kernelstack.pv_va; 592 lwp0.l_addr = proc0paddr; 593 594 /* 595 * We must now clean the cache again.... 596 * Cleaning may be done by reading new data to displace any 597 * dirty data in the cache. This will have happened in setttb() 598 * but since we are boot strapping the addresses used for the read 599 * may have just been remapped and thus the cache could be out 600 * of sync. A re-clean after the switch will cure this. 601 * After booting there are no gross reloations of the kernel thus 602 * this problem will not occur after initarm(). 603 */ 604 cpu_idcache_wbinv_all(); 605 606 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 607 608 /* 609 * Pages were allocated during the secondary bootstrap for the 610 * stacks for different CPU modes. 611 * We must now set the r13 registers in the different CPU modes to 612 * point to these stacks. 613 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 614 * of the stack memory. 615 */ 616 #ifdef VERBOSE_INIT_ARM 617 printf("init subsystems: stacks "); 618 #endif 619 620 set_stackptr(PSR_IRQ32_MODE, 621 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 622 set_stackptr(PSR_ABT32_MODE, 623 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 624 set_stackptr(PSR_UND32_MODE, 625 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 626 #ifdef PMAP_DEBUG 627 if (pmap_debug_level >= 0) 628 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 629 kernelstack.pv_pa); 630 #endif /* PMAP_DEBUG */ 631 632 /* 633 * Well we should set a data abort handler. 634 * Once things get going this will change as we will need a proper 635 * handler. Until then we will use a handler that just panics but 636 * tells us why. 637 * Initialisation of the vetcors will just panic on a data abort. 638 * This just fills in a slighly better one. 639 */ 640 #ifdef VERBOSE_INIT_ARM 641 printf("vectors "); 642 #endif 643 data_abort_handler_address = (u_int)data_abort_handler; 644 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 645 undefined_handler_address = (u_int)undefinedinstruction_bounce; 646 #ifdef VERBOSE_INIT_ARM 647 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 648 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 649 printf("undefined_handler_address = %08x\n", undefined_handler_address); 650 #endif 651 652 /* Initialise the undefined instruction handlers */ 653 #ifdef VERBOSE_INIT_ARM 654 printf("undefined "); 655 #endif 656 undefined_init(); 657 658 /* Load memory into UVM. */ 659 #ifdef VERBOSE_INIT_ARM 660 printf("page "); 661 #endif 662 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 663 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 664 atop(physical_freestart), atop(physical_freeend), 665 VM_FREELIST_DEFAULT); 666 667 /* Boot strap pmap telling it where the kernel page table is */ 668 #ifdef VERBOSE_INIT_ARM 669 printf("pmap "); 670 #endif 671 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 672 KERNEL_VM_BASE + KERNEL_VM_SIZE); 673 674 /* Setup the IRQ system */ 675 #ifdef VERBOSE_INIT_ARM 676 printf("irq "); 677 #endif 678 ixp12x0_intr_init(); 679 680 #ifdef VERBOSE_INIT_ARM 681 printf("done.\n"); 682 #endif 683 684 #ifdef VERBOSE_INIT_ARM 685 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 686 physical_freestart, free_pages, free_pages); 687 printf("freemempos=%08lx\n", freemempos); 688 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 689 #endif 690 691 consinit(); 692 #ifdef VERBOSE_INIT_ARM 693 printf("consinit \n"); 694 #endif 695 696 ixdp_ixp12x0_cc_setup(); 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("bootstrap done.\n"); 700 #endif 701 702 #ifdef IPKDB 703 /* Initialise ipkdb */ 704 ipkdb_init(); 705 if (boothowto & RB_KDB) 706 ipkdb_connect(0); 707 #endif /* NIPKDB */ 708 709 #if NKSYMS || defined(DDB) || defined(LKM) 710 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 711 #endif 712 713 #ifdef DDB 714 { 715 static struct undefined_handler uh; 716 717 uh.uh_handler = db_trapper; 718 install_coproc_handler_static(0, &uh); 719 } 720 721 if (boothowto & RB_KDB) 722 Debugger(); 723 #endif 724 725 /* We return the new stack pointer address */ 726 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 727 } 728 729 void 730 consinit(void) 731 { 732 extern struct bus_space ixpsip_bs_tag; 733 static int consinit_called = 0; 734 735 if (consinit_called != 0) 736 return; 737 738 consinit_called = 1; 739 740 if (ixpcomcnattach(&ixpsip_bs_tag, 741 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 742 CONSPEED, CONMODE)) 743 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 744 } 745 746 /* 747 * For optimal cache cleaning we need two 16K banks of 748 * virtual address space that NOTHING else will access 749 * and then we alternate the cache cleaning between the 750 * two banks. 751 * The cache cleaning code requires requires 2 banks aligned 752 * on total size boundry so the banks can be alternated by 753 * eorring the size bit (assumes the bank size is a power of 2) 754 */ 755 void 756 ixdp_ixp12x0_cc_setup(void) 757 { 758 int loop; 759 paddr_t kaddr; 760 pt_entry_t *pte; 761 762 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 763 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 764 pte = vtopte(ixp12x0_cc_base + loop); 765 *pte = L2_S_PROTO | kaddr | 766 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 767 PTE_SYNC(pte); 768 } 769 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 770 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 771 } 772
Indexes created Thu Oct 02 14:10:14 GMT 2025