ixm1200_machdep.c revision 1.39
1 /* $NetBSD: ixm1200_machdep.c,v 1.39 2009/03/14 14:45:59 dsl 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 1.39 2009/03/14 14:45:59 dsl Exp $"); 71 72 #include "opt_ddb.h" 73 #include "opt_modular.h" 74 #include "opt_pmap_debug.h" 75 76 #include <sys/param.h> 77 #include <sys/device.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/exec.h> 81 #include <sys/proc.h> 82 #include <sys/msgbuf.h> 83 #include <sys/reboot.h> 84 #include <sys/termios.h> 85 #include <sys/ksyms.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include "ksyms.h" 92 93 #if NKSYMS || defined(DDB) || defined(MODULAR) 94 #include <machine/db_machdep.h> 95 #include <ddb/db_sym.h> 96 #include <ddb/db_extern.h> 97 #ifndef DB_ELFSIZE 98 #error Must define DB_ELFSIZE! 99 #endif 100 #define ELFSIZE DB_ELFSIZE 101 #include <sys/exec_elf.h> 102 #endif 103 104 #include <machine/bootconfig.h> 105 #include <machine/bus.h> 106 #include <machine/cpu.h> 107 #include <machine/frame.h> 108 #include <arm/undefined.h> 109 110 #include <arm/arm32/machdep.h> 111 112 #include <arm/ixp12x0/ixp12x0reg.h> 113 #include <arm/ixp12x0/ixp12x0var.h> 114 #include <arm/ixp12x0/ixp12x0_comreg.h> 115 #include <arm/ixp12x0/ixp12x0_comvar.h> 116 #include <arm/ixp12x0/ixp12x0_pcireg.h> 117 118 #include <evbarm/ixm1200/ixm1200reg.h> 119 #include <evbarm/ixm1200/ixm1200var.h> 120 121 /* XXX for consinit related hacks */ 122 #include <sys/conf.h> 123 124 void ixp12x0_reset(void) __attribute__((noreturn)); 125 126 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 127 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 128 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 129 130 /* 131 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 132 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 133 */ 134 #define KERNEL_VM_SIZE 0x0C000000 135 136 /* 137 * Address to call from cpu_reset() to reset the machine. 138 * This is machine architecture dependant as it varies depending 139 * on where the ROM appears when you turn the MMU off. 140 */ 141 142 u_int cpu_reset_address = (u_int) ixp12x0_reset; 143 144 /* 145 * Define the default console speed for the board. 146 */ 147 #ifndef CONMODE 148 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 149 #endif 150 #ifndef CONSPEED 151 #define CONSPEED B38400 152 #endif 153 #ifndef CONADDR 154 #define CONADDR IXPCOM_UART_BASE 155 #endif 156 157 /* Define various stack sizes in pages */ 158 #define IRQ_STACK_SIZE 1 159 #define ABT_STACK_SIZE 1 160 #define UND_STACK_SIZE 1 161 162 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 irqstack; 181 pv_addr_t undstack; 182 pv_addr_t abtstack; 183 pv_addr_t kernelstack; 184 185 vm_offset_t msgbufphys; 186 187 extern u_int data_abort_handler_address; 188 extern u_int prefetch_abort_handler_address; 189 extern u_int undefined_handler_address; 190 extern int end; 191 192 #ifdef PMAP_DEBUG 193 extern int pmap_debug_level; 194 #endif /* PMAP_DEBUG */ 195 196 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 197 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 198 #define KERNEL_PT_KERNEL_NUM 2 199 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 200 /* Page table for mapping IO */ 201 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 202 /* Page tables for mapping kernel VM */ 203 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 204 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 205 206 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 207 208 struct user *proc0paddr; 209 210 #ifdef CPU_IXP12X0 211 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 212 extern unsigned int ixp12x0_cache_clean_addr; 213 extern unsigned int ixp12x0_cache_clean_size; 214 static vaddr_t ixp12x0_cc_base; 215 #endif /* CPU_IXP12X0 */ 216 217 /* Prototypes */ 218 219 void consinit(void); 220 u_int cpu_get_control(void); 221 222 void ixdp_ixp12x0_cc_setup(void); 223 224 /* 225 * void cpu_reboot(int howto, char *bootstr) 226 * 227 * Reboots the system 228 * 229 * Deal with any syncing, unmounting, dumping and shutdown hooks, 230 * then reset the CPU. 231 */ 232 233 void 234 cpu_reboot(howto, bootstr) 235 int howto; 236 char *bootstr; 237 { 238 /* 239 * If we are still cold then hit the air brakes 240 * and crash to earth fast 241 */ 242 if (cold) { 243 doshutdownhooks(); 244 pmf_system_shutdown(boothowto); 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 pmf_system_shutdown(boothowto); 276 277 /* Make sure IRQ's are disabled */ 278 IRQdisable; 279 280 if (howto & RB_HALT) { 281 printf("The operating system has halted.\n"); 282 printf("Please press any key to reboot.\n\n"); 283 cngetc(); 284 } 285 286 printf("rebooting...\n"); 287 288 /* all interrupts are disabled */ 289 disable_interrupts(I32_bit); 290 291 ixp12x0_reset(); 292 293 /* ...and if that didn't work, just croak. */ 294 printf("RESET FAILED!\n"); 295 for (;;); 296 } 297 298 /* Static device mappings. */ 299 static const struct pmap_devmap ixm1200_devmap[] = { 300 /* StrongARM System and Peripheral Registers */ 301 { 302 IXP12X0_SYS_VBASE, 303 IXP12X0_SYS_HWBASE, 304 IXP12X0_SYS_SIZE, 305 VM_PROT_READ|VM_PROT_WRITE, 306 PTE_NOCACHE, 307 }, 308 /* PCI Registers Accessible Through StrongARM Core */ 309 { 310 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 311 IXP12X0_PCI_SIZE, 312 VM_PROT_READ|VM_PROT_WRITE, 313 PTE_NOCACHE, 314 }, 315 /* PCI Registers Accessible Through I/O Cycle Access */ 316 { 317 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 318 IXP12X0_PCI_IO_SIZE, 319 VM_PROT_READ|VM_PROT_WRITE, 320 PTE_NOCACHE, 321 }, 322 /* PCI Type0 Configuration Space */ 323 { 324 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 325 IXP12X0_PCI_TYPE0_SIZE, 326 VM_PROT_READ|VM_PROT_WRITE, 327 PTE_NOCACHE, 328 }, 329 /* PCI Type1 Configuration Space */ 330 { 331 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 332 IXP12X0_PCI_TYPE1_SIZE, 333 VM_PROT_READ|VM_PROT_WRITE, 334 PTE_NOCACHE, 335 }, 336 { 337 0, 338 0, 339 0, 340 0, 341 0 342 }, 343 }; 344 345 /* 346 * Initial entry point on startup. This gets called before main() is 347 * entered. 348 * It should be responsible for setting up everything that must be 349 * in place when main is called. 350 * This includes 351 * Taking a copy of the boot configuration structure. 352 * Initialising the physical console so characters can be printed. 353 * Setting up page tables for the kernel 354 * Relocating the kernel to the bottom of physical memory 355 */ 356 u_int 357 initarm(void *arg) 358 { 359 int loop; 360 int loop1; 361 u_int kerneldatasize, symbolsize; 362 vaddr_t l1pagetable; 363 vaddr_t freemempos; 364 #if NKSYMS || defined(DDB) || defined(MODULAR) 365 Elf_Shdr *sh; 366 #endif 367 368 /* 369 * Since we map v0xf0000000 == p0x90000000, it's possible for 370 * us to initialize the console now. 371 */ 372 consinit(); 373 374 #ifdef VERBOSE_INIT_ARM 375 /* Talk to the user */ 376 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 377 #endif 378 379 /* 380 * Heads up ... Setup the CPU / MMU / TLB functions 381 */ 382 if (set_cpufuncs()) 383 panic("CPU not recognized!"); 384 385 /* XXX overwrite bootconfig to hardcoded values */ 386 bootconfig.dram[0].address = 0xc0000000; 387 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 388 bootconfig.dramblocks = 1; 389 390 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 391 392 symbolsize = 0; 393 394 #ifdef PMAP_DEBUG 395 pmap_debug(-1); 396 #endif 397 398 #if NKSYMS || defined(DDB) || defined(MODULAR) 399 if (! memcmp(&end, "\177ELF", 4)) { 400 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 401 loop = ((Elf_Ehdr *)&end)->e_shnum; 402 for(; loop; loop--, sh++) 403 if (sh->sh_offset > 0 && 404 (sh->sh_offset + sh->sh_size) > symbolsize) 405 symbolsize = sh->sh_offset + sh->sh_size; 406 } 407 #endif 408 #ifdef VERBOSE_INIT_ARM 409 printf("kernsize=0x%x\n", kerneldatasize); 410 #endif 411 kerneldatasize += symbolsize; 412 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 413 414 /* 415 * Set up the variables that define the availablilty of physcial 416 * memory 417 */ 418 physical_start = bootconfig.dram[0].address; 419 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 420 421 physical_freestart = physical_start 422 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 423 physical_freeend = physical_end; 424 425 physmem = (physical_end - physical_start) / PAGE_SIZE; 426 427 freemempos = 0xc0000000; 428 429 #ifdef VERBOSE_INIT_ARM 430 printf("Allocating page tables\n"); 431 #endif 432 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 433 434 #ifdef VERBOSE_INIT_ARM 435 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 436 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 437 physical_freestart, free_pages, free_pages); 438 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 439 physical_start, physical_end); 440 #endif 441 442 /* Define a macro to simplify memory allocation */ 443 #define valloc_pages(var, np) \ 444 alloc_pages((var).pv_pa, (np)); \ 445 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 446 #define alloc_pages(var, np) \ 447 (var) = freemempos; \ 448 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 449 freemempos += (np) * PAGE_SIZE; 450 451 loop1 = 0; 452 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 453 /* Are we 16KB aligned for an L1 ? */ 454 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 455 && kernel_l1pt.pv_pa == 0) { 456 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 457 } else { 458 valloc_pages(kernel_pt_table[loop1], 459 L2_TABLE_SIZE / PAGE_SIZE); 460 ++loop1; 461 } 462 } 463 464 #ifdef DIAGNOSTIC 465 /* This should never be able to happen but better confirm that. */ 466 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 467 panic("initarm: Failed to align the kernel page directory"); 468 #endif 469 470 /* 471 * Allocate a page for the system page mapped to V0x00000000 472 * This page will just contain the system vectors and can be 473 * shared by all processes. 474 */ 475 alloc_pages(systempage.pv_pa, 1); 476 477 /* Allocate stacks for all modes */ 478 valloc_pages(irqstack, IRQ_STACK_SIZE); 479 valloc_pages(abtstack, ABT_STACK_SIZE); 480 valloc_pages(undstack, UND_STACK_SIZE); 481 valloc_pages(kernelstack, UPAGES); 482 483 #ifdef VERBOSE_INIT_ARM 484 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 485 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 486 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 487 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 488 #endif 489 490 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 491 492 #ifdef CPU_IXP12X0 493 /* 494 * XXX totally stuffed hack to work round problems introduced 495 * in recent versions of the pmap code. Due to the calls used there 496 * we cannot allocate virtual memory during bootstrap. 497 */ 498 for(;;) { 499 alloc_pages(ixp12x0_cc_base, 1); 500 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 501 break; 502 } 503 { 504 vaddr_t dummy; 505 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 506 } 507 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 508 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 509 #endif /* CPU_IXP12X0 */ 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 513 #endif 514 515 /* 516 * Now we start construction of the L1 page table 517 * We start by mapping the L2 page tables into the L1. 518 * This means that we can replace L1 mappings later on if necessary 519 */ 520 l1pagetable = kernel_l1pt.pv_pa; 521 522 /* Map the L2 pages tables in the L1 page table */ 523 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 524 &kernel_pt_table[KERNEL_PT_SYS]); 525 526 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 527 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 528 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 529 530 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 531 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 532 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 533 534 /* update the top of the kernel VM */ 535 pmap_curmaxkvaddr = 536 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 537 538 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 539 &kernel_pt_table[KERNEL_PT_IO]); 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("Mapping kernel\n"); 543 #endif 544 545 #if XXX 546 /* Now we fill in the L2 pagetable for the kernel code/data */ 547 { 548 extern char etext[], _end[]; 549 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 550 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 551 u_int logical; 552 553 textsize = (textsize + PGOFSET) & ~PGOFSET; 554 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 555 556 logical = 0x00200000; /* offset of kernel in RAM */ 557 558 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 559 physical_start + logical, textsize, 560 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 561 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 562 physical_start + logical, totalsize - textsize, 563 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 564 } 565 #else 566 { 567 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 568 KERNEL_TEXT_BASE, kerneldatasize, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 } 571 #endif 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("Constructing L2 page tables\n"); 575 #endif 576 577 /* Map the stack pages */ 578 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 579 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 581 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 583 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 585 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 587 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 588 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 589 590 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 591 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 592 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 593 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 594 } 595 596 /* Map the vector page. */ 597 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 598 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 599 600 #ifdef VERBOSE_INIT_ARM 601 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 602 systempage.pv_pa, vector_page); 603 #endif 604 605 /* Map the statically mapped devices. */ 606 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 607 608 #ifdef VERBOSE_INIT_ARM 609 printf("done.\n"); 610 #endif 611 612 /* 613 * Map the Dcache Flush page. 614 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 615 */ 616 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 617 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 618 619 /* 620 * Now we have the real page tables in place so we can switch to them. 621 * Once this is done we will be running with the REAL kernel page 622 * tables. 623 */ 624 625 /* Switch tables */ 626 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 627 setttb(kernel_l1pt.pv_pa); 628 cpu_tlb_flushID(); 629 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 630 631 /* 632 * Moved here from cpu_startup() as data_abort_handler() references 633 * this during init 634 */ 635 proc0paddr = (struct user *)kernelstack.pv_va; 636 lwp0.l_addr = proc0paddr; 637 638 /* 639 * We must now clean the cache again.... 640 * Cleaning may be done by reading new data to displace any 641 * dirty data in the cache. This will have happened in setttb() 642 * but since we are boot strapping the addresses used for the read 643 * may have just been remapped and thus the cache could be out 644 * of sync. A re-clean after the switch will cure this. 645 * After booting there are no gross reloations of the kernel thus 646 * this problem will not occur after initarm(). 647 */ 648 cpu_idcache_wbinv_all(); 649 650 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 651 652 /* 653 * Pages were allocated during the secondary bootstrap for the 654 * stacks for different CPU modes. 655 * We must now set the r13 registers in the different CPU modes to 656 * point to these stacks. 657 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 658 * of the stack memory. 659 */ 660 #ifdef VERBOSE_INIT_ARM 661 printf("init subsystems: stacks "); 662 #endif 663 664 set_stackptr(PSR_IRQ32_MODE, 665 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 666 set_stackptr(PSR_ABT32_MODE, 667 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 668 set_stackptr(PSR_UND32_MODE, 669 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 670 #ifdef PMAP_DEBUG 671 if (pmap_debug_level >= 0) 672 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 673 kernelstack.pv_pa); 674 #endif /* PMAP_DEBUG */ 675 676 /* 677 * Well we should set a data abort handler. 678 * Once things get going this will change as we will need a proper 679 * handler. Until then we will use a handler that just panics but 680 * tells us why. 681 * Initialisation of the vetcors will just panic on a data abort. 682 * This just fills in a slightly better one. 683 */ 684 #ifdef VERBOSE_INIT_ARM 685 printf("vectors "); 686 #endif 687 data_abort_handler_address = (u_int)data_abort_handler; 688 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 689 undefined_handler_address = (u_int)undefinedinstruction_bounce; 690 #ifdef VERBOSE_INIT_ARM 691 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 692 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 693 printf("undefined_handler_address = %08x\n", undefined_handler_address); 694 #endif 695 696 /* Initialise the undefined instruction handlers */ 697 #ifdef VERBOSE_INIT_ARM 698 printf("undefined "); 699 #endif 700 undefined_init(); 701 702 /* Load memory into UVM. */ 703 #ifdef VERBOSE_INIT_ARM 704 printf("page "); 705 #endif 706 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 707 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 708 atop(physical_freestart), atop(physical_freeend), 709 VM_FREELIST_DEFAULT); 710 711 /* Boot strap pmap telling it where the kernel page table is */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("pmap "); 714 #endif 715 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 716 717 /* Setup the IRQ system */ 718 #ifdef VERBOSE_INIT_ARM 719 printf("irq "); 720 #endif 721 ixp12x0_intr_init(); 722 723 #ifdef VERBOSE_INIT_ARM 724 printf("done.\n"); 725 #endif 726 727 #ifdef VERBOSE_INIT_ARM 728 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 729 physical_freestart, free_pages, free_pages); 730 printf("freemempos=%08lx\n", freemempos); 731 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 732 #endif 733 734 consinit(); 735 #ifdef VERBOSE_INIT_ARM 736 printf("consinit \n"); 737 #endif 738 739 ixdp_ixp12x0_cc_setup(); 740 741 #ifdef VERBOSE_INIT_ARM 742 printf("bootstrap done.\n"); 743 #endif 744 745 #if NKSYMS || defined(DDB) || defined(MODULAR) 746 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 747 #endif 748 749 #ifdef DDB 750 db_machine_init(); 751 if (boothowto & RB_KDB) 752 Debugger(); 753 #endif 754 755 /* We return the new stack pointer address */ 756 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 757 } 758 759 void 760 consinit(void) 761 { 762 static int consinit_called = 0; 763 764 if (consinit_called != 0) 765 return; 766 767 consinit_called = 1; 768 769 pmap_devmap_register(ixm1200_devmap); 770 771 if (ixpcomcnattach(&ixp12x0_bs_tag, 772 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 773 CONSPEED, CONMODE)) 774 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 775 } 776 777 /* 778 * For optimal cache cleaning we need two 16K banks of 779 * virtual address space that NOTHING else will access 780 * and then we alternate the cache cleaning between the 781 * two banks. 782 * The cache cleaning code requires requires 2 banks aligned 783 * on total size boundry so the banks can be alternated by 784 * eorring the size bit (assumes the bank size is a power of 2) 785 */ 786 void 787 ixdp_ixp12x0_cc_setup(void) 788 { 789 int loop; 790 paddr_t kaddr; 791 pt_entry_t *pte; 792 793 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 794 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 795 pte = vtopte(ixp12x0_cc_base + loop); 796 *pte = L2_S_PROTO | kaddr | 797 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 798 PTE_SYNC(pte); 799 } 800 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 801 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 802 } 803
Indexes created Thu Oct 02 14:10:14 GMT 2025