ixm1200_machdep.c revision 1.13
1 /* $NetBSD: ixm1200_machdep.c,v 1.13 2003/03/25 06:53:15 igy 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 1.13 2003/03/25 06:53:15 igy 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 <dev/cons.h> 86 87 #ifdef DDB 88 #include <machine/db_machdep.h> 89 #include <ddb/db_sym.h> 90 #include <ddb/db_extern.h> 91 #ifndef DB_ELFSIZE 92 #error Must define DB_ELFSIZE! 93 #endif 94 #define ELFSIZE DB_ELFSIZE 95 #include <sys/exec_elf.h> 96 #endif 97 98 #include <machine/bootconfig.h> 99 #include <machine/bus.h> 100 #include <machine/cpu.h> 101 #include <machine/frame.h> 102 #include <arm/undefined.h> 103 104 #include <arm/arm32/machdep.h> 105 106 #include <arm/ixp12x0/ixp12x0reg.h> 107 #include <arm/ixp12x0/ixp12x0var.h> 108 #include <arm/ixp12x0/ixp12x0_comreg.h> 109 #include <arm/ixp12x0/ixp12x0_comvar.h> 110 #include <arm/ixp12x0/ixp12x0_pcireg.h> 111 112 #include <evbarm/ixm1200/ixm1200reg.h> 113 #include <evbarm/ixm1200/ixm1200var.h> 114 115 #include "opt_ipkdb.h" 116 117 /* XXX for consinit related hacks */ 118 #include <sys/conf.h> 119 120 void ixp12x0_reset(void) __attribute__((noreturn)); 121 122 /* 123 * Address to call from cpu_reset() to reset the machine. 124 * This is machine architecture dependant as it varies depending 125 * on where the ROM appears when you turn the MMU off. 126 */ 127 128 u_int cpu_reset_address = (u_int) ixp12x0_reset; 129 130 /* 131 * Define the default console speed for the board. 132 */ 133 #ifndef CONMODE 134 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 135 #endif 136 #ifndef CONSPEED 137 #define CONSPEED B38400 138 #endif 139 #ifndef CONADDR 140 #define CONADDR IXPCOM_UART_BASE 141 #endif 142 143 cons_decl(com); 144 cons_decl(ixpcom); 145 146 struct consdev constab[] = { 147 #if (NIXPCOM > 0) 148 cons_init(ixpcom), 149 #endif 150 { 0 }, 151 }; 152 153 /* Define various stack sizes in pages */ 154 #define IRQ_STACK_SIZE 1 155 #define ABT_STACK_SIZE 1 156 #ifdef IPKDB 157 #define UND_STACK_SIZE 2 158 #else 159 #define UND_STACK_SIZE 1 160 #endif 161 162 BootConfig bootconfig; /* Boot config storage */ 163 char *boot_args = NULL; 164 char *boot_file = NULL; 165 166 vm_offset_t physical_start; 167 vm_offset_t physical_freestart; 168 vm_offset_t physical_freeend; 169 vm_offset_t physical_end; 170 u_int free_pages; 171 vm_offset_t pagetables_start; 172 int physmem = 0; 173 174 /*int debug_flags;*/ 175 #ifndef PMAP_STATIC_L1S 176 int max_processes = 64; /* Default number */ 177 #endif /* !PMAP_STATIC_L1S */ 178 179 /* Physical and virtual addresses for some global pages */ 180 pv_addr_t systempage; 181 pv_addr_t irqstack; 182 pv_addr_t undstack; 183 pv_addr_t abtstack; 184 pv_addr_t kernelstack; 185 186 vm_offset_t msgbufphys; 187 188 extern u_int data_abort_handler_address; 189 extern u_int prefetch_abort_handler_address; 190 extern u_int undefined_handler_address; 191 extern int end; 192 193 #ifdef PMAP_DEBUG 194 extern int pmap_debug_level; 195 #endif /* PMAP_DEBUG */ 196 197 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 198 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 199 #define KERNEL_PT_KERNEL_NUM 2 200 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 201 /* Page table for mapping IO */ 202 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 203 /* Page tables for mapping kernel VM */ 204 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 205 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 206 207 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 208 209 struct user *proc0paddr; 210 211 #ifdef CPU_IXP12X0 212 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 213 extern unsigned int ixp12x0_cache_clean_addr; 214 extern unsigned int ixp12x0_cache_clean_size; 215 static vaddr_t ixp12x0_cc_base; 216 #endif /* CPU_IXP12X0 */ 217 218 /* Prototypes */ 219 220 void consinit __P((void)); 221 u_int cpu_get_control __P((void)); 222 223 void ixdp_ixp12x0_cc_setup(void); 224 225 #ifdef DEBUG_BEFOREMMU 226 static void fakecninit(); 227 #endif 228 229 extern int db_trapper(u_int, u_int, trapframe_t *, int); 230 231 /* 232 * void cpu_reboot(int howto, char *bootstr) 233 * 234 * Reboots the system 235 * 236 * Deal with any syncing, unmounting, dumping and shutdown hooks, 237 * then reset the CPU. 238 */ 239 240 void 241 cpu_reboot(howto, bootstr) 242 int howto; 243 char *bootstr; 244 { 245 /* 246 * If we are still cold then hit the air brakes 247 * and crash to earth fast 248 */ 249 if (cold) { 250 doshutdownhooks(); 251 printf("Halted while still in the ICE age.\n"); 252 printf("The operating system has halted.\n"); 253 printf("Please press any key to reboot.\n\n"); 254 cngetc(); 255 printf("rebooting...\n"); 256 ixp12x0_reset(); 257 } 258 259 /* Disable console buffering */ 260 cnpollc(1); 261 262 /* 263 * If RB_NOSYNC was not specified sync the discs. 264 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 265 * It looks like syslogd is getting woken up only to find that it cannot 266 * page part of the binary in as the filesystem has been unmounted. 267 */ 268 if (!(howto & RB_NOSYNC)) 269 bootsync(); 270 271 /* Say NO to interrupts */ 272 splhigh(); 273 274 /* Do a dump if requested. */ 275 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 276 dumpsys(); 277 278 /* Run any shutdown hooks */ 279 doshutdownhooks(); 280 281 /* Make sure IRQ's are disabled */ 282 IRQdisable; 283 284 if (howto & RB_HALT) { 285 printf("The operating system has halted.\n"); 286 printf("Please press any key to reboot.\n\n"); 287 cngetc(); 288 } 289 290 printf("rebooting...\n"); 291 292 /* all interrupts are disabled */ 293 disable_interrupts(I32_bit); 294 295 ixp12x0_reset(); 296 297 /* ...and if that didn't work, just croak. */ 298 printf("RESET FAILED!\n"); 299 for (;;); 300 } 301 302 /* 303 * Initial entry point on startup. This gets called before main() is 304 * entered. 305 * It should be responsible for setting up everything that must be 306 * in place when main is called. 307 * This includes 308 * Taking a copy of the boot configuration structure. 309 * Initialising the physical console so characters can be printed. 310 * Setting up page tables for the kernel 311 * Relocating the kernel to the bottom of physical memory 312 */ 313 u_int 314 initarm(void *arg) 315 { 316 int loop; 317 int loop1; 318 u_int kerneldatasize, symbolsize; 319 vaddr_t l1pagetable; 320 vaddr_t freemempos; 321 pv_addr_t kernel_l1pt; 322 pv_addr_t kernel_ptpt; 323 #ifdef DDB 324 Elf_Shdr *sh; 325 #endif 326 327 #ifdef DEBUG_BEFOREMMU 328 /* 329 * At this point, we cannot call real consinit(). 330 * Just call a faked up version of consinit(), which does the thing 331 * with MMU disabled. 332 */ 333 fakecninit(); 334 #endif 335 /* 336 * Since we map v0xf0000000 == p0x90000000, it's possible for 337 * us to initialize the console now. 338 */ 339 consinit(); 340 341 /* Talk to the user */ 342 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 343 344 /* 345 * Heads up ... Setup the CPU / MMU / TLB functions 346 */ 347 if (set_cpufuncs()) 348 panic("cpu not recognized!"); 349 350 /* XXX overwrite bootconfig to hardcoded values */ 351 bootconfig.dram[0].address = 0xc0000000; 352 bootconfig.dram[0].pages = 0x10000000 / NBPG; /* SDRAM 256MB */ 353 bootconfig.dramblocks = 1; 354 355 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 356 357 symbolsize = 0; 358 359 #ifdef PMAP_DEBUG 360 pmap_debug(-1); 361 #endif 362 363 #ifdef DDB 364 if (! memcmp(&end, "\177ELF", 4)) { 365 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 366 loop = ((Elf_Ehdr *)&end)->e_shnum; 367 for(; loop; loop--, sh++) 368 if (sh->sh_offset > 0 && 369 (sh->sh_offset + sh->sh_size) > symbolsize) 370 symbolsize = sh->sh_offset + sh->sh_size; 371 } 372 #endif 373 printf("kernsize=0x%x\n", kerneldatasize); 374 kerneldatasize += symbolsize; 375 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 376 377 /* 378 * Set up the variables that define the availablilty of physcial 379 * memory 380 */ 381 physical_start = bootconfig.dram[0].address; 382 physical_end = physical_start + (bootconfig.dram[0].pages * NBPG); 383 384 physical_freestart = physical_start 385 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 386 physical_freeend = physical_end; 387 388 physmem = (physical_end - physical_start) / NBPG; 389 390 freemempos = 0xc0000000; 391 392 #ifdef VERBOSE_INIT_ARM 393 printf("Allocating page tables\n"); 394 #endif 395 free_pages = (physical_freeend - physical_freestart) / NBPG; 396 397 #ifdef VERBOSE_INIT_ARM 398 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 399 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 400 physical_freestart, free_pages, free_pages); 401 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 402 physical_start, physical_end); 403 #endif 404 405 /* Define a macro to simplify memory allocation */ 406 #define valloc_pages(var, np) \ 407 alloc_pages((var).pv_pa, (np)); \ 408 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 409 #define alloc_pages(var, np) \ 410 (var) = freemempos; \ 411 memset((char *)(var), 0, ((np) * NBPG)); \ 412 freemempos += (np) * NBPG; 413 414 loop1 = 0; 415 kernel_l1pt.pv_pa = 0; 416 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 417 /* Are we 16KB aligned for an L1 ? */ 418 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 419 && kernel_l1pt.pv_pa == 0) { 420 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 421 } else { 422 alloc_pages(kernel_pt_table[loop1].pv_pa, 423 L2_TABLE_SIZE / NBPG); 424 kernel_pt_table[loop1].pv_va = 425 kernel_pt_table[loop1].pv_pa; 426 ++loop1; 427 } 428 } 429 430 #ifdef DIAGNOSTIC 431 /* This should never be able to happen but better confirm that. */ 432 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 433 panic("initarm: Failed to align the kernel page directory"); 434 #endif 435 436 /* 437 * Allocate a page for the system page mapped to V0x00000000 438 * This page will just contain the system vectors and can be 439 * shared by all processes. 440 */ 441 alloc_pages(systempage.pv_pa, 1); 442 443 /* Allocate a page for the page table to map kernel page tables. */ 444 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 445 446 /* Allocate stacks for all modes */ 447 valloc_pages(irqstack, IRQ_STACK_SIZE); 448 valloc_pages(abtstack, ABT_STACK_SIZE); 449 valloc_pages(undstack, UND_STACK_SIZE); 450 valloc_pages(kernelstack, UPAGES); 451 452 #ifdef VERBOSE_INIT_ARM 453 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 454 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 455 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 456 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 457 #endif 458 459 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 460 461 #ifdef CPU_IXP12X0 462 /* 463 * XXX totally stuffed hack to work round problems introduced 464 * in recent versions of the pmap code. Due to the calls used there 465 * we cannot allocate virtual memory during bootstrap. 466 */ 467 for(;;) { 468 alloc_pages(ixp12x0_cc_base, 1); 469 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 470 break; 471 } 472 { 473 vaddr_t dummy; 474 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / NBPG - 1); 475 } 476 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 477 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 478 #endif /* CPU_IXP12X0 */ 479 480 #ifdef VERBOSE_INIT_ARM 481 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 482 #endif 483 484 /* 485 * Now we start construction of the L1 page table 486 * We start by mapping the L2 page tables into the L1. 487 * This means that we can replace L1 mappings later on if necessary 488 */ 489 l1pagetable = kernel_l1pt.pv_pa; 490 491 /* Map the L2 pages tables in the L1 page table */ 492 pmap_link_l2pt(l1pagetable, 0x00000000, 493 &kernel_pt_table[KERNEL_PT_SYS]); 494 495 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 496 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 497 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 498 499 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 500 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 501 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 502 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 503 504 /* update the top of the kernel VM */ 505 pmap_curmaxkvaddr = 506 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 507 508 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 509 &kernel_pt_table[KERNEL_PT_IO]); 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("Mapping kernel\n"); 513 #endif 514 515 #if XXX 516 /* Now we fill in the L2 pagetable for the kernel code/data */ 517 { 518 extern char etext[], _end[]; 519 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 520 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 521 u_int logical; 522 523 textsize = (textsize + PGOFSET) & ~PGOFSET; 524 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 525 526 logical = 0x00200000; /* offset of kernel in RAM */ 527 528 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 529 physical_start + logical, textsize, 530 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 531 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 532 physical_start + logical, totalsize - textsize, 533 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 534 } 535 #else 536 { 537 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 538 KERNEL_TEXT_BASE, kerneldatasize, 539 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 540 } 541 #endif 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("Constructing L2 page tables\n"); 545 #endif 546 547 /* Map the stack pages */ 548 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 549 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 550 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 551 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 552 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 553 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 554 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 555 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 556 557 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 558 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 559 560 /* Map the page table that maps the kernel pages */ 561 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 562 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 563 564 /* 565 * Map entries in the page table used to map PTE's 566 * Basically every kernel page table gets mapped here 567 */ 568 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 569 pmap_map_entry(l1pagetable, 570 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 571 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 572 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 574 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 575 pmap_map_entry(l1pagetable, 576 PTE_BASE + ((KERNEL_BASE + 577 (loop * 0x00400000)) >> (PGSHIFT-2)), 578 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 579 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 581 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 582 pmap_map_entry(l1pagetable, 583 PTE_BASE + ((KERNEL_VM_BASE + 584 (loop * 0x00400000)) >> (PGSHIFT-2)), 585 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 586 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 587 588 pmap_map_entry(l1pagetable, 589 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 590 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 591 592 /* Map the vector page. */ 593 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 598 systempage.pv_pa, vector_page); 599 #endif 600 601 /* 602 * Map the PCI I/O spaces and IXP12x0 registers 603 */ 604 605 ixp12x0_pmap_io_reg(l1pagetable); 606 607 printf("done.\n"); 608 609 /* 610 * Map the Dcache Flush page. 611 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 612 */ 613 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 614 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 615 616 /* 617 * Now we have the real page tables in place so we can switch to them. 618 * Once this is done we will be running with the REAL kernel page 619 * tables. 620 */ 621 622 /* Switch tables */ 623 setttb(kernel_l1pt.pv_pa); 624 cpu_tlb_flushID(); 625 626 /* 627 * We must now clean the cache again.... 628 * Cleaning may be done by reading new data to displace any 629 * dirty data in the cache. This will have happened in setttb() 630 * but since we are boot strapping the addresses used for the read 631 * may have just been remapped and thus the cache could be out 632 * of sync. A re-clean after the switch will cure this. 633 * After booting there are no gross reloations of the kernel thus 634 * this problem will not occur after initarm(). 635 */ 636 cpu_idcache_wbinv_all(); 637 638 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 639 640 /* 641 * Pages were allocated during the secondary bootstrap for the 642 * stacks for different CPU modes. 643 * We must now set the r13 registers in the different CPU modes to 644 * point to these stacks. 645 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 646 * of the stack memory. 647 */ 648 printf("init subsystems: stacks "); 649 650 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 651 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 652 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 653 #ifdef PMAP_DEBUG 654 if (pmap_debug_level >= 0) 655 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 656 kernelstack.pv_pa); 657 #endif /* PMAP_DEBUG */ 658 659 /* 660 * Well we should set a data abort handler. 661 * Once things get going this will change as we will need a proper 662 * handler. Until then we will use a handler that just panics but 663 * tells us why. 664 * Initialisation of the vetcors will just panic on a data abort. 665 * This just fills in a slighly better one. 666 */ 667 printf("vectors "); 668 data_abort_handler_address = (u_int)data_abort_handler; 669 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 670 undefined_handler_address = (u_int)undefinedinstruction_bounce; 671 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 672 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 673 printf("undefined_handler_address = %08x\n", undefined_handler_address); 674 675 /* Initialise the undefined instruction handlers */ 676 printf("undefined "); 677 undefined_init(); 678 679 /* Load memory into UVM. */ 680 printf("page "); 681 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 682 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 683 atop(physical_freestart), atop(physical_freeend), 684 VM_FREELIST_DEFAULT); 685 686 /* Boot strap pmap telling it where the kernel page table is */ 687 printf("pmap "); 688 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 689 690 /* Setup the IRQ system */ 691 printf("irq "); 692 ixp12x0_intr_init(); 693 printf("done.\n"); 694 695 #ifdef VERBOSE_INIT_ARM 696 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 697 physical_freestart, free_pages, free_pages); 698 printf("freemempos=%08lx\n", freemempos); 699 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 700 #endif 701 702 consinit(); 703 printf("consinit \n"); 704 705 ixdp_ixp12x0_cc_setup(); 706 707 printf("bootstrap done.\n"); 708 709 #ifdef IPKDB 710 /* Initialise ipkdb */ 711 ipkdb_init(); 712 if (boothowto & RB_KDB) 713 ipkdb_connect(0); 714 #endif /* NIPKDB */ 715 716 #ifdef DDB 717 { 718 static struct undefined_handler uh; 719 720 uh.uh_handler = db_trapper; 721 install_coproc_handler_static(0, &uh); 722 } 723 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 724 725 if (boothowto & RB_KDB) 726 Debugger(); 727 #endif 728 729 /* We return the new stack pointer address */ 730 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 731 } 732 733 void 734 consinit(void) 735 { 736 extern struct bus_space ixpsip_bs_tag; 737 static int consinit_called = 0; 738 739 if (consinit_called != 0) 740 return; 741 742 consinit_called = 1; 743 744 if (ixpcomcnattach(&ixpsip_bs_tag, 745 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 746 CONSPEED, CONMODE)) 747 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 748 } 749 750 #ifdef DEBUG_BEFOREMMU 751 cons_decl(ixpcom); 752 void 753 fakecninit() 754 { 755 static struct consdev fakecntab = cons_init(ixpcom); 756 cn_tab = &fakecntab; 757 758 (*cn_tab->cn_init)(0); 759 cn_tab->cn_pri = CN_REMOTE; 760 } 761 #endif 762 763 /* 764 * For optimal cache cleaning we need two 16K banks of 765 * virtual address space that NOTHING else will access 766 * and then we alternate the cache cleaning between the 767 * two banks. 768 * The cache cleaning code requires requires 2 banks aligned 769 * on total size boundry so the banks can be alternated by 770 * eorring the size bit (assumes the bank size is a power of 2) 771 */ 772 void 773 ixdp_ixp12x0_cc_setup(void) 774 { 775 int loop; 776 paddr_t kaddr; 777 pt_entry_t *pte; 778 779 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 780 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += NBPG) { 781 pte = vtopte(ixp12x0_cc_base + loop); 782 *pte = L2_S_PROTO | kaddr | 783 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 784 PTE_SYNC(pte); 785 } 786 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 787 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 788 } 789
Indexes created Thu Oct 02 14:10:14 GMT 2025