ixm1200_machdep.c revision 1.40
1 /* $NetBSD: ixm1200_machdep.c,v 1.40 2009/03/14 15:36:05 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 1.40 2009/03/14 15:36:05 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(int howto, char *bootstr) 235 { 236 /* 237 * If we are still cold then hit the air brakes 238 * and crash to earth fast 239 */ 240 if (cold) { 241 doshutdownhooks(); 242 pmf_system_shutdown(boothowto); 243 printf("Halted while still in the ICE age.\n"); 244 printf("The operating system has halted.\n"); 245 printf("Please press any key to reboot.\n\n"); 246 cngetc(); 247 printf("rebooting...\n"); 248 ixp12x0_reset(); 249 } 250 251 /* Disable console buffering */ 252 cnpollc(1); 253 254 /* 255 * If RB_NOSYNC was not specified sync the discs. 256 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 257 * It looks like syslogd is getting woken up only to find that it cannot 258 * page part of the binary in as the filesystem has been unmounted. 259 */ 260 if (!(howto & RB_NOSYNC)) 261 bootsync(); 262 263 /* Say NO to interrupts */ 264 splhigh(); 265 266 /* Do a dump if requested. */ 267 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 268 dumpsys(); 269 270 /* Run any shutdown hooks */ 271 doshutdownhooks(); 272 273 pmf_system_shutdown(boothowto); 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 /* Static device mappings. */ 297 static const struct pmap_devmap ixm1200_devmap[] = { 298 /* StrongARM System and Peripheral Registers */ 299 { 300 IXP12X0_SYS_VBASE, 301 IXP12X0_SYS_HWBASE, 302 IXP12X0_SYS_SIZE, 303 VM_PROT_READ|VM_PROT_WRITE, 304 PTE_NOCACHE, 305 }, 306 /* PCI Registers Accessible Through StrongARM Core */ 307 { 308 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 309 IXP12X0_PCI_SIZE, 310 VM_PROT_READ|VM_PROT_WRITE, 311 PTE_NOCACHE, 312 }, 313 /* PCI Registers Accessible Through I/O Cycle Access */ 314 { 315 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 316 IXP12X0_PCI_IO_SIZE, 317 VM_PROT_READ|VM_PROT_WRITE, 318 PTE_NOCACHE, 319 }, 320 /* PCI Type0 Configuration Space */ 321 { 322 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 323 IXP12X0_PCI_TYPE0_SIZE, 324 VM_PROT_READ|VM_PROT_WRITE, 325 PTE_NOCACHE, 326 }, 327 /* PCI Type1 Configuration Space */ 328 { 329 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 330 IXP12X0_PCI_TYPE1_SIZE, 331 VM_PROT_READ|VM_PROT_WRITE, 332 PTE_NOCACHE, 333 }, 334 { 335 0, 336 0, 337 0, 338 0, 339 0 340 }, 341 }; 342 343 /* 344 * Initial entry point on startup. This gets called before main() is 345 * entered. 346 * It should be responsible for setting up everything that must be 347 * in place when main is called. 348 * This includes 349 * Taking a copy of the boot configuration structure. 350 * Initialising the physical console so characters can be printed. 351 * Setting up page tables for the kernel 352 * Relocating the kernel to the bottom of physical memory 353 */ 354 u_int 355 initarm(void *arg) 356 { 357 int loop; 358 int loop1; 359 u_int kerneldatasize, symbolsize; 360 vaddr_t l1pagetable; 361 vaddr_t freemempos; 362 #if NKSYMS || defined(DDB) || defined(MODULAR) 363 Elf_Shdr *sh; 364 #endif 365 366 /* 367 * Since we map v0xf0000000 == p0x90000000, it's possible for 368 * us to initialize the console now. 369 */ 370 consinit(); 371 372 #ifdef VERBOSE_INIT_ARM 373 /* Talk to the user */ 374 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 375 #endif 376 377 /* 378 * Heads up ... Setup the CPU / MMU / TLB functions 379 */ 380 if (set_cpufuncs()) 381 panic("CPU not recognized!"); 382 383 /* XXX overwrite bootconfig to hardcoded values */ 384 bootconfig.dram[0].address = 0xc0000000; 385 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 386 bootconfig.dramblocks = 1; 387 388 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 389 390 symbolsize = 0; 391 392 #ifdef PMAP_DEBUG 393 pmap_debug(-1); 394 #endif 395 396 #if NKSYMS || defined(DDB) || defined(MODULAR) 397 if (! memcmp(&end, "\177ELF", 4)) { 398 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 399 loop = ((Elf_Ehdr *)&end)->e_shnum; 400 for(; loop; loop--, sh++) 401 if (sh->sh_offset > 0 && 402 (sh->sh_offset + sh->sh_size) > symbolsize) 403 symbolsize = sh->sh_offset + sh->sh_size; 404 } 405 #endif 406 #ifdef VERBOSE_INIT_ARM 407 printf("kernsize=0x%x\n", kerneldatasize); 408 #endif 409 kerneldatasize += symbolsize; 410 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 411 412 /* 413 * Set up the variables that define the availablilty of physcial 414 * memory 415 */ 416 physical_start = bootconfig.dram[0].address; 417 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 418 419 physical_freestart = physical_start 420 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 421 physical_freeend = physical_end; 422 423 physmem = (physical_end - physical_start) / PAGE_SIZE; 424 425 freemempos = 0xc0000000; 426 427 #ifdef VERBOSE_INIT_ARM 428 printf("Allocating page tables\n"); 429 #endif 430 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 431 432 #ifdef VERBOSE_INIT_ARM 433 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 434 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 435 physical_freestart, free_pages, free_pages); 436 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 437 physical_start, physical_end); 438 #endif 439 440 /* Define a macro to simplify memory allocation */ 441 #define valloc_pages(var, np) \ 442 alloc_pages((var).pv_pa, (np)); \ 443 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 444 #define alloc_pages(var, np) \ 445 (var) = freemempos; \ 446 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 447 freemempos += (np) * PAGE_SIZE; 448 449 loop1 = 0; 450 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 451 /* Are we 16KB aligned for an L1 ? */ 452 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 453 && kernel_l1pt.pv_pa == 0) { 454 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 455 } else { 456 valloc_pages(kernel_pt_table[loop1], 457 L2_TABLE_SIZE / PAGE_SIZE); 458 ++loop1; 459 } 460 } 461 462 #ifdef DIAGNOSTIC 463 /* This should never be able to happen but better confirm that. */ 464 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 465 panic("initarm: Failed to align the kernel page directory"); 466 #endif 467 468 /* 469 * Allocate a page for the system page mapped to V0x00000000 470 * This page will just contain the system vectors and can be 471 * shared by all processes. 472 */ 473 alloc_pages(systempage.pv_pa, 1); 474 475 /* Allocate stacks for all modes */ 476 valloc_pages(irqstack, IRQ_STACK_SIZE); 477 valloc_pages(abtstack, ABT_STACK_SIZE); 478 valloc_pages(undstack, UND_STACK_SIZE); 479 valloc_pages(kernelstack, UPAGES); 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 483 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 484 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 485 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 486 #endif 487 488 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 489 490 #ifdef CPU_IXP12X0 491 /* 492 * XXX totally stuffed hack to work round problems introduced 493 * in recent versions of the pmap code. Due to the calls used there 494 * we cannot allocate virtual memory during bootstrap. 495 */ 496 for(;;) { 497 alloc_pages(ixp12x0_cc_base, 1); 498 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 499 break; 500 } 501 { 502 vaddr_t dummy; 503 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 504 } 505 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 506 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 507 #endif /* CPU_IXP12X0 */ 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 511 #endif 512 513 /* 514 * Now we start construction of the L1 page table 515 * We start by mapping the L2 page tables into the L1. 516 * This means that we can replace L1 mappings later on if necessary 517 */ 518 l1pagetable = kernel_l1pt.pv_pa; 519 520 /* Map the L2 pages tables in the L1 page table */ 521 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 522 &kernel_pt_table[KERNEL_PT_SYS]); 523 524 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 525 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 526 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 527 528 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 529 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 530 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 531 532 /* update the top of the kernel VM */ 533 pmap_curmaxkvaddr = 534 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 535 536 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 537 &kernel_pt_table[KERNEL_PT_IO]); 538 539 #ifdef VERBOSE_INIT_ARM 540 printf("Mapping kernel\n"); 541 #endif 542 543 #if XXX 544 /* Now we fill in the L2 pagetable for the kernel code/data */ 545 { 546 extern char etext[], _end[]; 547 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 548 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 549 u_int logical; 550 551 textsize = (textsize + PGOFSET) & ~PGOFSET; 552 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 553 554 logical = 0x00200000; /* offset of kernel in RAM */ 555 556 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 557 physical_start + logical, textsize, 558 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 559 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 560 physical_start + logical, totalsize - textsize, 561 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 562 } 563 #else 564 { 565 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 566 KERNEL_TEXT_BASE, kerneldatasize, 567 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 568 } 569 #endif 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("Constructing L2 page tables\n"); 573 #endif 574 575 /* Map the stack pages */ 576 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 577 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 579 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 581 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 583 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 585 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 586 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 587 588 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 589 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 590 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 592 } 593 594 /* Map the vector page. */ 595 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, 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 /* Map the statically mapped devices. */ 604 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("done.\n"); 608 #endif 609 610 /* 611 * Map the Dcache Flush page. 612 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 613 */ 614 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 615 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 616 617 /* 618 * Now we have the real page tables in place so we can switch to them. 619 * Once this is done we will be running with the REAL kernel page 620 * tables. 621 */ 622 623 /* Switch tables */ 624 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 625 setttb(kernel_l1pt.pv_pa); 626 cpu_tlb_flushID(); 627 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 628 629 /* 630 * Moved here from cpu_startup() as data_abort_handler() references 631 * this during init 632 */ 633 proc0paddr = (struct user *)kernelstack.pv_va; 634 lwp0.l_addr = proc0paddr; 635 636 /* 637 * We must now clean the cache again.... 638 * Cleaning may be done by reading new data to displace any 639 * dirty data in the cache. This will have happened in setttb() 640 * but since we are boot strapping the addresses used for the read 641 * may have just been remapped and thus the cache could be out 642 * of sync. A re-clean after the switch will cure this. 643 * After booting there are no gross reloations of the kernel thus 644 * this problem will not occur after initarm(). 645 */ 646 cpu_idcache_wbinv_all(); 647 648 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 649 650 /* 651 * Pages were allocated during the secondary bootstrap for the 652 * stacks for different CPU modes. 653 * We must now set the r13 registers in the different CPU modes to 654 * point to these stacks. 655 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 656 * of the stack memory. 657 */ 658 #ifdef VERBOSE_INIT_ARM 659 printf("init subsystems: stacks "); 660 #endif 661 662 set_stackptr(PSR_IRQ32_MODE, 663 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 664 set_stackptr(PSR_ABT32_MODE, 665 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 666 set_stackptr(PSR_UND32_MODE, 667 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 668 #ifdef PMAP_DEBUG 669 if (pmap_debug_level >= 0) 670 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 671 kernelstack.pv_pa); 672 #endif /* PMAP_DEBUG */ 673 674 /* 675 * Well we should set a data abort handler. 676 * Once things get going this will change as we will need a proper 677 * handler. Until then we will use a handler that just panics but 678 * tells us why. 679 * Initialisation of the vetcors will just panic on a data abort. 680 * This just fills in a slightly better one. 681 */ 682 #ifdef VERBOSE_INIT_ARM 683 printf("vectors "); 684 #endif 685 data_abort_handler_address = (u_int)data_abort_handler; 686 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 687 undefined_handler_address = (u_int)undefinedinstruction_bounce; 688 #ifdef VERBOSE_INIT_ARM 689 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 690 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 691 printf("undefined_handler_address = %08x\n", undefined_handler_address); 692 #endif 693 694 /* Initialise the undefined instruction handlers */ 695 #ifdef VERBOSE_INIT_ARM 696 printf("undefined "); 697 #endif 698 undefined_init(); 699 700 /* Load memory into UVM. */ 701 #ifdef VERBOSE_INIT_ARM 702 printf("page "); 703 #endif 704 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 705 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 706 atop(physical_freestart), atop(physical_freeend), 707 VM_FREELIST_DEFAULT); 708 709 /* Boot strap pmap telling it where the kernel page table is */ 710 #ifdef VERBOSE_INIT_ARM 711 printf("pmap "); 712 #endif 713 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 714 715 /* Setup the IRQ system */ 716 #ifdef VERBOSE_INIT_ARM 717 printf("irq "); 718 #endif 719 ixp12x0_intr_init(); 720 721 #ifdef VERBOSE_INIT_ARM 722 printf("done.\n"); 723 #endif 724 725 #ifdef VERBOSE_INIT_ARM 726 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 727 physical_freestart, free_pages, free_pages); 728 printf("freemempos=%08lx\n", freemempos); 729 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 730 #endif 731 732 consinit(); 733 #ifdef VERBOSE_INIT_ARM 734 printf("consinit \n"); 735 #endif 736 737 ixdp_ixp12x0_cc_setup(); 738 739 #ifdef VERBOSE_INIT_ARM 740 printf("bootstrap done.\n"); 741 #endif 742 743 #if NKSYMS || defined(DDB) || defined(MODULAR) 744 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 745 #endif 746 747 #ifdef DDB 748 db_machine_init(); 749 if (boothowto & RB_KDB) 750 Debugger(); 751 #endif 752 753 /* We return the new stack pointer address */ 754 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 755 } 756 757 void 758 consinit(void) 759 { 760 static int consinit_called = 0; 761 762 if (consinit_called != 0) 763 return; 764 765 consinit_called = 1; 766 767 pmap_devmap_register(ixm1200_devmap); 768 769 if (ixpcomcnattach(&ixp12x0_bs_tag, 770 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 771 CONSPEED, CONMODE)) 772 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 773 } 774 775 /* 776 * For optimal cache cleaning we need two 16K banks of 777 * virtual address space that NOTHING else will access 778 * and then we alternate the cache cleaning between the 779 * two banks. 780 * The cache cleaning code requires requires 2 banks aligned 781 * on total size boundry so the banks can be alternated by 782 * eorring the size bit (assumes the bank size is a power of 2) 783 */ 784 void 785 ixdp_ixp12x0_cc_setup(void) 786 { 787 int loop; 788 paddr_t kaddr; 789 pt_entry_t *pte; 790 791 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 792 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 793 pte = vtopte(ixp12x0_cc_base + loop); 794 *pte = L2_S_PROTO | kaddr | 795 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 796 PTE_SYNC(pte); 797 } 798 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 799 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 800 } 801
Indexes created Thu Oct 02 14:10:14 GMT 2025