ixm1200_machdep.c revision 1.14
1 /* $NetBSD: ixm1200_machdep.c,v 1.14 2003/04/02 03:49:26 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 1.14 2003/04/02 03:49:26 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 85 #include <uvm/uvm_extern.h> 86 87 #include <dev/cons.h> 88 89 #ifdef DDB 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 <machine/bus.h> 102 #include <machine/cpu.h> 103 #include <machine/frame.h> 104 #include <arm/undefined.h> 105 106 #include <arm/arm32/machdep.h> 107 108 #include <arm/ixp12x0/ixp12x0reg.h> 109 #include <arm/ixp12x0/ixp12x0var.h> 110 #include <arm/ixp12x0/ixp12x0_comreg.h> 111 #include <arm/ixp12x0/ixp12x0_comvar.h> 112 #include <arm/ixp12x0/ixp12x0_pcireg.h> 113 114 #include <evbarm/ixm1200/ixm1200reg.h> 115 #include <evbarm/ixm1200/ixm1200var.h> 116 117 #include "opt_ipkdb.h" 118 119 /* XXX for consinit related hacks */ 120 #include <sys/conf.h> 121 122 void ixp12x0_reset(void) __attribute__((noreturn)); 123 124 /* 125 * Address to call from cpu_reset() to reset the machine. 126 * This is machine architecture dependant as it varies depending 127 * on where the ROM appears when you turn the MMU off. 128 */ 129 130 u_int cpu_reset_address = (u_int) ixp12x0_reset; 131 132 /* 133 * Define the default console speed for the board. 134 */ 135 #ifndef CONMODE 136 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 137 #endif 138 #ifndef CONSPEED 139 #define CONSPEED B38400 140 #endif 141 #ifndef CONADDR 142 #define CONADDR IXPCOM_UART_BASE 143 #endif 144 145 cons_decl(com); 146 cons_decl(ixpcom); 147 148 struct consdev constab[] = { 149 #if (NIXPCOM > 0) 150 cons_init(ixpcom), 151 #endif 152 { 0 }, 153 }; 154 155 /* Define various stack sizes in pages */ 156 #define IRQ_STACK_SIZE 1 157 #define ABT_STACK_SIZE 1 158 #ifdef IPKDB 159 #define UND_STACK_SIZE 2 160 #else 161 #define UND_STACK_SIZE 1 162 #endif 163 164 BootConfig bootconfig; /* Boot config storage */ 165 char *boot_args = NULL; 166 char *boot_file = NULL; 167 168 vm_offset_t physical_start; 169 vm_offset_t physical_freestart; 170 vm_offset_t physical_freeend; 171 vm_offset_t physical_end; 172 u_int free_pages; 173 vm_offset_t pagetables_start; 174 int physmem = 0; 175 176 /*int debug_flags;*/ 177 #ifndef PMAP_STATIC_L1S 178 int max_processes = 64; /* Default number */ 179 #endif /* !PMAP_STATIC_L1S */ 180 181 /* Physical and virtual addresses for some global pages */ 182 pv_addr_t systempage; 183 pv_addr_t irqstack; 184 pv_addr_t undstack; 185 pv_addr_t abtstack; 186 pv_addr_t kernelstack; 187 188 vm_offset_t msgbufphys; 189 190 extern u_int data_abort_handler_address; 191 extern u_int prefetch_abort_handler_address; 192 extern u_int undefined_handler_address; 193 extern int end; 194 195 #ifdef PMAP_DEBUG 196 extern int pmap_debug_level; 197 #endif /* PMAP_DEBUG */ 198 199 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 200 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 201 #define KERNEL_PT_KERNEL_NUM 2 202 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 203 /* Page table for mapping IO */ 204 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 205 /* Page tables for mapping kernel VM */ 206 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 207 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 208 209 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 210 211 struct user *proc0paddr; 212 213 #ifdef CPU_IXP12X0 214 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 215 extern unsigned int ixp12x0_cache_clean_addr; 216 extern unsigned int ixp12x0_cache_clean_size; 217 static vaddr_t ixp12x0_cc_base; 218 #endif /* CPU_IXP12X0 */ 219 220 /* Prototypes */ 221 222 void consinit __P((void)); 223 u_int cpu_get_control __P((void)); 224 225 void ixdp_ixp12x0_cc_setup(void); 226 227 #ifdef DEBUG_BEFOREMMU 228 static void fakecninit(); 229 #endif 230 231 extern int db_trapper(u_int, u_int, trapframe_t *, int); 232 233 /* 234 * void cpu_reboot(int howto, char *bootstr) 235 * 236 * Reboots the system 237 * 238 * Deal with any syncing, unmounting, dumping and shutdown hooks, 239 * then reset the CPU. 240 */ 241 242 void 243 cpu_reboot(howto, bootstr) 244 int howto; 245 char *bootstr; 246 { 247 /* 248 * If we are still cold then hit the air brakes 249 * and crash to earth fast 250 */ 251 if (cold) { 252 doshutdownhooks(); 253 printf("Halted while still in the ICE age.\n"); 254 printf("The operating system has halted.\n"); 255 printf("Please press any key to reboot.\n\n"); 256 cngetc(); 257 printf("rebooting...\n"); 258 ixp12x0_reset(); 259 } 260 261 /* Disable console buffering */ 262 cnpollc(1); 263 264 /* 265 * If RB_NOSYNC was not specified sync the discs. 266 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 267 * It looks like syslogd is getting woken up only to find that it cannot 268 * page part of the binary in as the filesystem has been unmounted. 269 */ 270 if (!(howto & RB_NOSYNC)) 271 bootsync(); 272 273 /* Say NO to interrupts */ 274 splhigh(); 275 276 /* Do a dump if requested. */ 277 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 278 dumpsys(); 279 280 /* Run any shutdown hooks */ 281 doshutdownhooks(); 282 283 /* Make sure IRQ's are disabled */ 284 IRQdisable; 285 286 if (howto & RB_HALT) { 287 printf("The operating system has halted.\n"); 288 printf("Please press any key to reboot.\n\n"); 289 cngetc(); 290 } 291 292 printf("rebooting...\n"); 293 294 /* all interrupts are disabled */ 295 disable_interrupts(I32_bit); 296 297 ixp12x0_reset(); 298 299 /* ...and if that didn't work, just croak. */ 300 printf("RESET FAILED!\n"); 301 for (;;); 302 } 303 304 /* 305 * Initial entry point on startup. This gets called before main() is 306 * entered. 307 * It should be responsible for setting up everything that must be 308 * in place when main is called. 309 * This includes 310 * Taking a copy of the boot configuration structure. 311 * Initialising the physical console so characters can be printed. 312 * Setting up page tables for the kernel 313 * Relocating the kernel to the bottom of physical memory 314 */ 315 u_int 316 initarm(void *arg) 317 { 318 int loop; 319 int loop1; 320 u_int kerneldatasize, symbolsize; 321 vaddr_t l1pagetable; 322 vaddr_t freemempos; 323 pv_addr_t kernel_l1pt; 324 pv_addr_t kernel_ptpt; 325 #ifdef DDB 326 Elf_Shdr *sh; 327 #endif 328 329 #ifdef DEBUG_BEFOREMMU 330 /* 331 * At this point, we cannot call real consinit(). 332 * Just call a faked up version of consinit(), which does the thing 333 * with MMU disabled. 334 */ 335 fakecninit(); 336 #endif 337 /* 338 * Since we map v0xf0000000 == p0x90000000, it's possible for 339 * us to initialize the console now. 340 */ 341 consinit(); 342 343 /* Talk to the user */ 344 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 345 346 /* 347 * Heads up ... Setup the CPU / MMU / TLB functions 348 */ 349 if (set_cpufuncs()) 350 panic("cpu not recognized!"); 351 352 /* XXX overwrite bootconfig to hardcoded values */ 353 bootconfig.dram[0].address = 0xc0000000; 354 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 355 bootconfig.dramblocks = 1; 356 357 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 358 359 symbolsize = 0; 360 361 #ifdef PMAP_DEBUG 362 pmap_debug(-1); 363 #endif 364 365 #ifdef DDB 366 if (! memcmp(&end, "\177ELF", 4)) { 367 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 368 loop = ((Elf_Ehdr *)&end)->e_shnum; 369 for(; loop; loop--, sh++) 370 if (sh->sh_offset > 0 && 371 (sh->sh_offset + sh->sh_size) > symbolsize) 372 symbolsize = sh->sh_offset + sh->sh_size; 373 } 374 #endif 375 printf("kernsize=0x%x\n", kerneldatasize); 376 kerneldatasize += symbolsize; 377 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 378 379 /* 380 * Set up the variables that define the availablilty of physcial 381 * memory 382 */ 383 physical_start = bootconfig.dram[0].address; 384 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 385 386 physical_freestart = physical_start 387 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 388 physical_freeend = physical_end; 389 390 physmem = (physical_end - physical_start) / PAGE_SIZE; 391 392 freemempos = 0xc0000000; 393 394 #ifdef VERBOSE_INIT_ARM 395 printf("Allocating page tables\n"); 396 #endif 397 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 398 399 #ifdef VERBOSE_INIT_ARM 400 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 401 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 402 physical_freestart, free_pages, free_pages); 403 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 404 physical_start, physical_end); 405 #endif 406 407 /* Define a macro to simplify memory allocation */ 408 #define valloc_pages(var, np) \ 409 alloc_pages((var).pv_pa, (np)); \ 410 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 411 #define alloc_pages(var, np) \ 412 (var) = freemempos; \ 413 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 414 freemempos += (np) * PAGE_SIZE; 415 416 loop1 = 0; 417 kernel_l1pt.pv_pa = 0; 418 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 419 /* Are we 16KB aligned for an L1 ? */ 420 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 421 && kernel_l1pt.pv_pa == 0) { 422 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 423 } else { 424 alloc_pages(kernel_pt_table[loop1].pv_pa, 425 L2_TABLE_SIZE / PAGE_SIZE); 426 kernel_pt_table[loop1].pv_va = 427 kernel_pt_table[loop1].pv_pa; 428 ++loop1; 429 } 430 } 431 432 #ifdef DIAGNOSTIC 433 /* This should never be able to happen but better confirm that. */ 434 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 435 panic("initarm: Failed to align the kernel page directory"); 436 #endif 437 438 /* 439 * Allocate a page for the system page mapped to V0x00000000 440 * This page will just contain the system vectors and can be 441 * shared by all processes. 442 */ 443 alloc_pages(systempage.pv_pa, 1); 444 445 /* Allocate a page for the page table to map kernel page tables. */ 446 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / PAGE_SIZE); 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 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 505 506 /* update the top of the kernel VM */ 507 pmap_curmaxkvaddr = 508 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 509 510 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 511 &kernel_pt_table[KERNEL_PT_IO]); 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("Mapping kernel\n"); 515 #endif 516 517 #if XXX 518 /* Now we fill in the L2 pagetable for the kernel code/data */ 519 { 520 extern char etext[], _end[]; 521 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 522 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 523 u_int logical; 524 525 textsize = (textsize + PGOFSET) & ~PGOFSET; 526 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 527 528 logical = 0x00200000; /* offset of kernel in RAM */ 529 530 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 531 physical_start + logical, textsize, 532 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 533 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 534 physical_start + logical, totalsize - textsize, 535 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 536 } 537 #else 538 { 539 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 540 KERNEL_TEXT_BASE, kerneldatasize, 541 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 542 } 543 #endif 544 545 #ifdef VERBOSE_INIT_ARM 546 printf("Constructing L2 page tables\n"); 547 #endif 548 549 /* Map the stack pages */ 550 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 551 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 552 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 553 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 554 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 555 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 556 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 557 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 558 559 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 560 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 561 562 /* Map the page table that maps the kernel pages */ 563 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 564 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 565 566 /* 567 * Map entries in the page table used to map PTE's 568 * Basically every kernel page table gets mapped here 569 */ 570 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 571 pmap_map_entry(l1pagetable, 572 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 573 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 574 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 577 pmap_map_entry(l1pagetable, 578 PTE_BASE + ((KERNEL_BASE + 579 (loop * 0x00400000)) >> (PGSHIFT-2)), 580 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 583 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 584 pmap_map_entry(l1pagetable, 585 PTE_BASE + ((KERNEL_VM_BASE + 586 (loop * 0x00400000)) >> (PGSHIFT-2)), 587 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 588 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 590 pmap_map_entry(l1pagetable, 591 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 592 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 593 594 /* Map the vector page. */ 595 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 596 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 598 #ifdef VERBOSE_INIT_ARM 599 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 600 systempage.pv_pa, vector_page); 601 #endif 602 603 /* 604 * Map the PCI I/O spaces and IXP12x0 registers 605 */ 606 607 ixp12x0_pmap_io_reg(l1pagetable); 608 609 printf("done.\n"); 610 611 /* 612 * Map the Dcache Flush page. 613 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 614 */ 615 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 616 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 617 618 /* 619 * Now we have the real page tables in place so we can switch to them. 620 * Once this is done we will be running with the REAL kernel page 621 * tables. 622 */ 623 624 /* Switch tables */ 625 setttb(kernel_l1pt.pv_pa); 626 cpu_tlb_flushID(); 627 628 /* 629 * We must now clean the cache again.... 630 * Cleaning may be done by reading new data to displace any 631 * dirty data in the cache. This will have happened in setttb() 632 * but since we are boot strapping the addresses used for the read 633 * may have just been remapped and thus the cache could be out 634 * of sync. A re-clean after the switch will cure this. 635 * After booting there are no gross reloations of the kernel thus 636 * this problem will not occur after initarm(). 637 */ 638 cpu_idcache_wbinv_all(); 639 640 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 641 642 /* 643 * Pages were allocated during the secondary bootstrap for the 644 * stacks for different CPU modes. 645 * We must now set the r13 registers in the different CPU modes to 646 * point to these stacks. 647 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 648 * of the stack memory. 649 */ 650 printf("init subsystems: stacks "); 651 652 set_stackptr(PSR_IRQ32_MODE, 653 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 654 set_stackptr(PSR_ABT32_MODE, 655 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 656 set_stackptr(PSR_UND32_MODE, 657 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 658 #ifdef PMAP_DEBUG 659 if (pmap_debug_level >= 0) 660 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 661 kernelstack.pv_pa); 662 #endif /* PMAP_DEBUG */ 663 664 /* 665 * Well we should set a data abort handler. 666 * Once things get going this will change as we will need a proper 667 * handler. Until then we will use a handler that just panics but 668 * tells us why. 669 * Initialisation of the vetcors will just panic on a data abort. 670 * This just fills in a slighly better one. 671 */ 672 printf("vectors "); 673 data_abort_handler_address = (u_int)data_abort_handler; 674 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 675 undefined_handler_address = (u_int)undefinedinstruction_bounce; 676 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 677 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 678 printf("undefined_handler_address = %08x\n", undefined_handler_address); 679 680 /* Initialise the undefined instruction handlers */ 681 printf("undefined "); 682 undefined_init(); 683 684 /* Load memory into UVM. */ 685 printf("page "); 686 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 687 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 688 atop(physical_freestart), atop(physical_freeend), 689 VM_FREELIST_DEFAULT); 690 691 /* Boot strap pmap telling it where the kernel page table is */ 692 printf("pmap "); 693 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 694 695 /* Setup the IRQ system */ 696 printf("irq "); 697 ixp12x0_intr_init(); 698 printf("done.\n"); 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 printf("consinit \n"); 709 710 ixdp_ixp12x0_cc_setup(); 711 712 printf("bootstrap done.\n"); 713 714 #ifdef IPKDB 715 /* Initialise ipkdb */ 716 ipkdb_init(); 717 if (boothowto & RB_KDB) 718 ipkdb_connect(0); 719 #endif /* NIPKDB */ 720 721 #ifdef DDB 722 { 723 static struct undefined_handler uh; 724 725 uh.uh_handler = db_trapper; 726 install_coproc_handler_static(0, &uh); 727 } 728 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 729 730 if (boothowto & RB_KDB) 731 Debugger(); 732 #endif 733 734 /* We return the new stack pointer address */ 735 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 736 } 737 738 void 739 consinit(void) 740 { 741 extern struct bus_space ixpsip_bs_tag; 742 static int consinit_called = 0; 743 744 if (consinit_called != 0) 745 return; 746 747 consinit_called = 1; 748 749 if (ixpcomcnattach(&ixpsip_bs_tag, 750 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 751 CONSPEED, CONMODE)) 752 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 753 } 754 755 #ifdef DEBUG_BEFOREMMU 756 cons_decl(ixpcom); 757 void 758 fakecninit() 759 { 760 static struct consdev fakecntab = cons_init(ixpcom); 761 cn_tab = &fakecntab; 762 763 (*cn_tab->cn_init)(0); 764 cn_tab->cn_pri = CN_REMOTE; 765 } 766 #endif 767 768 /* 769 * For optimal cache cleaning we need two 16K banks of 770 * virtual address space that NOTHING else will access 771 * and then we alternate the cache cleaning between the 772 * two banks. 773 * The cache cleaning code requires requires 2 banks aligned 774 * on total size boundry so the banks can be alternated by 775 * eorring the size bit (assumes the bank size is a power of 2) 776 */ 777 void 778 ixdp_ixp12x0_cc_setup(void) 779 { 780 int loop; 781 paddr_t kaddr; 782 pt_entry_t *pte; 783 784 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 785 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 786 pte = vtopte(ixp12x0_cc_base + loop); 787 *pte = L2_S_PROTO | kaddr | 788 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 789 PTE_SYNC(pte); 790 } 791 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 792 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 793 } 794
Indexes created Thu Oct 02 14:10:14 GMT 2025