1 /* $NetBSD: ixm1200_machdep.c,v 1.68 2023/08/03 08:16:31 mrg 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 * 17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 /* 30 * Copyright (c) 1997,1998 Mark Brinicombe. 31 * Copyright (c) 1997,1998 Causality Limited. 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by Mark Brinicombe 45 * for the NetBSD Project. 46 * 4. The name of the company nor the name of the author may be used to 47 * endorse or promote products derived from this software without specific 48 * prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 51 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 52 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 54 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 55 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.68 2023/08/03 08:16:31 mrg Exp $"); 65 66 #include "opt_arm_debug.h" 67 #include "opt_console.h" 68 #include "opt_ddb.h" 69 #include "opt_modular.h" 70 71 #include <sys/param.h> 72 #include <sys/device.h> 73 #include <sys/systm.h> 74 #include <sys/kernel.h> 75 #include <sys/exec.h> 76 #include <sys/proc.h> 77 #include <sys/msgbuf.h> 78 #include <sys/reboot.h> 79 #include <sys/termios.h> 80 #include <sys/ksyms.h> 81 #include <sys/bus.h> 82 #include <sys/cpu.h> 83 84 #include <uvm/uvm_extern.h> 85 86 #include <dev/cons.h> 87 88 #include "ksyms.h" 89 90 #if NKSYMS || defined(DDB) || defined(MODULAR) 91 #include <machine/db_machdep.h> 92 #include <ddb/db_sym.h> 93 #include <ddb/db_extern.h> 94 #include <sys/exec_elf.h> 95 #endif 96 97 #include <machine/bootconfig.h> 98 #include <arm/locore.h> 99 #include <arm/undefined.h> 100 101 #include <arm/arm32/machdep.h> 102 103 #include <arm/ixp12x0/ixp12x0reg.h> 104 #include <arm/ixp12x0/ixp12x0var.h> 105 #include <arm/ixp12x0/ixp12x0_comreg.h> 106 #include <arm/ixp12x0/ixp12x0_comvar.h> 107 #include <arm/ixp12x0/ixp12x0_pcireg.h> 108 109 #include <evbarm/ixm1200/ixm1200reg.h> 110 #include <evbarm/ixm1200/ixm1200var.h> 111 112 /* XXX for consinit related hacks */ 113 #include <sys/conf.h> 114 115 void ixp12x0_reset(void) __attribute__((noreturn)); 116 117 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 118 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 119 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 120 121 /* 122 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 123 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 124 */ 125 #define KERNEL_VM_SIZE 0x0C000000 126 127 /* 128 * Address to call from cpu_reset() to reset the machine. 129 * This is machine architecture dependent as it varies depending 130 * on where the ROM appears when you turn the MMU off. 131 */ 132 133 /* 134 * Define the default console speed for the board. 135 */ 136 #ifndef CONMODE 137 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 138 #endif 139 #ifndef CONSPEED 140 #define CONSPEED B38400 141 #endif 142 #ifndef CONADDR 143 #define CONADDR IXPCOM_UART_BASE 144 #endif 145 146 BootConfig bootconfig; /* Boot config storage */ 147 char *boot_args = NULL; 148 char *boot_file = NULL; 149 150 vaddr_t physical_start; 151 vaddr_t physical_freestart; 152 vaddr_t physical_freeend; 153 vaddr_t physical_end; 154 u_int free_pages; 155 156 /*int debug_flags;*/ 157 #ifndef PMAP_STATIC_L1S 158 int max_processes = 64; /* Default number */ 159 #endif /* !PMAP_STATIC_L1S */ 160 161 paddr_t msgbufphys; 162 163 extern int end; 164 165 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 166 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 167 #define KERNEL_PT_KERNEL_NUM 2 168 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 169 /* Page table for mapping IO */ 170 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 171 /* Page tables for mapping kernel VM */ 172 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 173 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 174 175 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 176 177 #ifdef CPU_IXP12X0 178 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 179 extern unsigned int ixp12x0_cache_clean_addr; 180 extern unsigned int ixp12x0_cache_clean_size; 181 static vaddr_t ixp12x0_cc_base; 182 #endif /* CPU_IXP12X0 */ 183 184 /* Prototypes */ 185 186 void consinit(void); 187 u_int cpu_get_control(void); 188 189 void ixdp_ixp12x0_cc_setup(void); 190 191 /* 192 * void cpu_reboot(int howto, char *bootstr) 193 * 194 * Reboots the system 195 * 196 * Deal with any syncing, unmounting, dumping and shutdown hooks, 197 * then reset the CPU. 198 */ 199 200 void 201 cpu_reboot(int howto, char *bootstr) 202 { 203 /* 204 * If we are still cold then hit the air brakes 205 * and crash to earth fast 206 */ 207 if (cold) { 208 doshutdownhooks(); 209 pmf_system_shutdown(boothowto); 210 printf("Halted while still in the ICE age.\n"); 211 printf("The operating system has halted.\n"); 212 printf("Please press any key to reboot.\n\n"); 213 cngetc(); 214 printf("rebooting...\n"); 215 ixp12x0_reset(); 216 } 217 218 /* Disable console buffering */ 219 cnpollc(1); 220 221 /* 222 * If RB_NOSYNC was not specified sync the discs. 223 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 224 * It looks like syslogd is getting woken up only to find that it cannot 225 * page part of the binary in as the filesystem has been unmounted. 226 */ 227 if (!(howto & RB_NOSYNC)) 228 bootsync(); 229 230 /* Say NO to interrupts */ 231 splhigh(); 232 233 /* Do a dump if requested. */ 234 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 235 dumpsys(); 236 237 /* Run any shutdown hooks */ 238 doshutdownhooks(); 239 240 pmf_system_shutdown(boothowto); 241 242 /* Make sure IRQ's are disabled */ 243 IRQdisable; 244 245 if (howto & RB_HALT) { 246 printf("The operating system has halted.\n"); 247 printf("Please press any key to reboot.\n\n"); 248 cngetc(); 249 } 250 251 printf("rebooting...\n"); 252 253 /* all interrupts are disabled */ 254 disable_interrupts(I32_bit); 255 256 ixp12x0_reset(); 257 258 /* ...and if that didn't work, just croak. */ 259 printf("RESET FAILED!\n"); 260 for (;;); 261 } 262 263 /* Static device mappings. */ 264 static const struct pmap_devmap ixm1200_devmap[] = { 265 /* StrongARM System and Peripheral Registers */ 266 DEVMAP_ENTRY( 267 IXP12X0_SYS_VBASE, 268 IXP12X0_SYS_HWBASE, 269 IXP12X0_SYS_SIZE 270 ), 271 /* PCI Registers Accessible Through StrongARM Core */ 272 DEVMAP_ENTRY( 273 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 274 IXP12X0_PCI_SIZE 275 ), 276 /* PCI Registers Accessible Through I/O Cycle Access */ 277 DEVMAP_ENTRY( 278 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 279 IXP12X0_PCI_IO_SIZE 280 ), 281 /* PCI Type0 Configuration Space */ 282 DEVMAP_ENTRY( 283 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 284 IXP12X0_PCI_TYPE0_SIZE 285 ), 286 /* PCI Type1 Configuration Space */ 287 DEVMAP_ENTRY( 288 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 289 IXP12X0_PCI_TYPE1_SIZE 290 ), 291 DEVMAP_ENTRY_END 292 }; 293 294 /* 295 * Initial entry point on startup. This gets called before main() is 296 * entered. 297 * It should be responsible for setting up everything that must be 298 * in place when main is called. 299 * This includes 300 * Taking a copy of the boot configuration structure. 301 * Initialising the physical console so characters can be printed. 302 * Setting up page tables for the kernel 303 * Relocating the kernel to the bottom of physical memory 304 */ 305 vaddr_t 306 initarm(void *arg) 307 { 308 int loop; 309 int loop1; 310 u_int kerneldatasize, symbolsize; 311 vaddr_t l1pagetable; 312 vaddr_t freemempos; 313 #if NKSYMS || defined(DDB) || defined(MODULAR) 314 Elf_Shdr *sh; 315 #endif 316 317 cpu_reset_address = ixp12x0_reset; 318 319 /* 320 * Since we map v0xf0000000 == p0x90000000, it's possible for 321 * us to initialize the console now. 322 */ 323 consinit(); 324 325 #ifdef VERBOSE_INIT_ARM 326 /* Talk to the user */ 327 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 328 #endif 329 330 /* 331 * Heads up ... Setup the CPU / MMU / TLB functions 332 */ 333 if (set_cpufuncs()) 334 panic("CPU not recognized!"); 335 336 /* XXX overwrite bootconfig to hardcoded values */ 337 bootconfig.dram[0].address = 0xc0000000; 338 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 339 bootconfig.dramblocks = 1; 340 341 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 342 343 symbolsize = 0; 344 345 #if NKSYMS || defined(DDB) || defined(MODULAR) 346 if (! memcmp(&end, "\177ELF", 4)) { 347 /* 348 * XXXGCC12. 349 * This accesses beyond what "int end" technically supplies. 350 */ 351 #pragma GCC push_options 352 #pragma GCC diagnostic ignored "-Warray-bounds" 353 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 354 #pragma GCC pop_options 355 loop = ((Elf_Ehdr *)&end)->e_shnum; 356 for(; loop; loop--, sh++) 357 if (sh->sh_offset > 0 && 358 (sh->sh_offset + sh->sh_size) > symbolsize) 359 symbolsize = sh->sh_offset + sh->sh_size; 360 } 361 #endif 362 #ifdef VERBOSE_INIT_ARM 363 printf("kernsize=0x%x\n", kerneldatasize); 364 #endif 365 kerneldatasize += symbolsize; 366 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 367 368 /* 369 * Set up the variables that define the availability of physical 370 * memory 371 */ 372 physical_start = bootconfig.dram[0].address; 373 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 374 375 physical_freestart = physical_start 376 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 377 physical_freeend = physical_end; 378 379 physmem = (physical_end - physical_start) / PAGE_SIZE; 380 381 freemempos = 0xc0000000; 382 383 #ifdef VERBOSE_INIT_ARM 384 printf("Allocating page tables\n"); 385 #endif 386 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 387 388 #ifdef VERBOSE_INIT_ARM 389 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 390 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 391 physical_freestart, free_pages, free_pages); 392 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 393 physical_start, physical_end); 394 #endif 395 396 /* Define a macro to simplify memory allocation */ 397 #define valloc_pages(var, np) \ 398 alloc_pages((var).pv_pa, (np)); \ 399 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 400 #define alloc_pages(var, np) \ 401 (var) = freemempos; \ 402 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 403 freemempos += (np) * PAGE_SIZE; 404 405 loop1 = 0; 406 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 407 /* Are we 16KB aligned for an L1 ? */ 408 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 409 && kernel_l1pt.pv_pa == 0) { 410 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 411 } else { 412 valloc_pages(kernel_pt_table[loop1], 413 L2_TABLE_SIZE / PAGE_SIZE); 414 ++loop1; 415 } 416 } 417 418 #ifdef DIAGNOSTIC 419 /* This should never be able to happen but better confirm that. */ 420 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 421 panic("initarm: Failed to align the kernel page directory"); 422 #endif 423 424 /* 425 * Allocate a page for the system page mapped to V0x00000000 426 * This page will just contain the system vectors and can be 427 * shared by all processes. 428 */ 429 alloc_pages(systempage.pv_pa, 1); 430 431 /* Allocate stacks for all modes */ 432 valloc_pages(irqstack, IRQ_STACK_SIZE); 433 valloc_pages(abtstack, ABT_STACK_SIZE); 434 valloc_pages(undstack, UND_STACK_SIZE); 435 valloc_pages(kernelstack, UPAGES); 436 437 #ifdef VERBOSE_INIT_ARM 438 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 439 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 440 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 441 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 442 #endif 443 444 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 445 446 #ifdef CPU_IXP12X0 447 /* 448 * XXX totally stuffed hack to work round problems introduced 449 * in recent versions of the pmap code. Due to the calls used there 450 * we cannot allocate virtual memory during bootstrap. 451 */ 452 for(;;) { 453 alloc_pages(ixp12x0_cc_base, 1); 454 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 455 break; 456 } 457 { 458 vaddr_t dummy; 459 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 460 } 461 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 462 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 463 #endif /* CPU_IXP12X0 */ 464 465 #ifdef VERBOSE_INIT_ARM 466 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 467 #endif 468 469 /* 470 * Now we start construction of the L1 page table 471 * We start by mapping the L2 page tables into the L1. 472 * This means that we can replace L1 mappings later on if necessary 473 */ 474 l1pagetable = kernel_l1pt.pv_pa; 475 476 /* Map the L2 pages tables in the L1 page table */ 477 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 478 &kernel_pt_table[KERNEL_PT_SYS]); 479 480 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 481 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 482 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 483 484 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 485 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 486 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 487 488 /* update the top of the kernel VM */ 489 pmap_curmaxkvaddr = 490 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 491 492 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 493 &kernel_pt_table[KERNEL_PT_IO]); 494 495 #ifdef VERBOSE_INIT_ARM 496 printf("Mapping kernel\n"); 497 #endif 498 499 #if XXX 500 /* Now we fill in the L2 pagetable for the kernel code/data */ 501 { 502 extern char etext[], _end[]; 503 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 504 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 505 u_int logical; 506 507 textsize = (textsize + PGOFSET) & ~PGOFSET; 508 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 509 510 logical = 0x00200000; /* offset of kernel in RAM */ 511 512 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 513 physical_start + logical, textsize, 514 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 515 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 516 physical_start + logical, totalsize - textsize, 517 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 518 } 519 #else 520 { 521 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 522 KERNEL_TEXT_BASE, kerneldatasize, 523 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 524 } 525 #endif 526 527 #ifdef VERBOSE_INIT_ARM 528 printf("Constructing L2 page tables\n"); 529 #endif 530 531 /* Map the stack pages */ 532 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 533 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 534 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 535 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 536 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 537 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 538 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 539 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 540 541 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 542 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 543 544 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 545 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 546 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 547 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 548 } 549 550 /* Map the vector page. */ 551 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 554 #ifdef VERBOSE_INIT_ARM 555 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 556 systempage.pv_pa, vector_page); 557 #endif 558 559 /* Map the statically mapped devices. */ 560 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("done.\n"); 564 #endif 565 566 /* 567 * Map the Dcache Flush page. 568 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 569 */ 570 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 571 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 572 573 /* 574 * Now we have the real page tables in place so we can switch to them. 575 * Once this is done we will be running with the REAL kernel page 576 * tables. 577 */ 578 579 /* Switch tables */ 580 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 581 cpu_setttb(kernel_l1pt.pv_pa, true); 582 cpu_tlb_flushID(); 583 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 584 585 /* 586 * Moved here from cpu_startup() as data_abort_handler() references 587 * this during init 588 */ 589 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 590 591 /* 592 * We must now clean the cache again.... 593 * Cleaning may be done by reading new data to displace any 594 * dirty data in the cache. This will have happened in cpu_setttb() 595 * but since we are boot strapping the addresses used for the read 596 * may have just been remapped and thus the cache could be out 597 * of sync. A re-clean after the switch will cure this. 598 * After booting there are no gross relocations of the kernel thus 599 * this problem will not occur after initarm(). 600 */ 601 cpu_idcache_wbinv_all(); 602 603 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 604 605 /* 606 * Pages were allocated during the secondary bootstrap for the 607 * stacks for different CPU modes. 608 * We must now set the r13 registers in the different CPU modes to 609 * point to these stacks. 610 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 611 * of the stack memory. 612 */ 613 #ifdef VERBOSE_INIT_ARM 614 printf("init subsystems: stacks "); 615 #endif 616 617 set_stackptr(PSR_IRQ32_MODE, 618 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 619 set_stackptr(PSR_ABT32_MODE, 620 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 621 set_stackptr(PSR_UND32_MODE, 622 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 623 #ifdef VERBOSE_INIT_ARM 624 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 625 kernelstack.pv_pa); 626 #endif /* VERBOSE_INIT_ARM */ 627 628 /* 629 * Well we should set a data abort handler. 630 * Once things get going this will change as we will need a proper 631 * handler. Until then we will use a handler that just panics but 632 * tells us why. 633 * Initialisation of the vectors will just panic on a data abort. 634 * This just fills in a slightly better one. 635 */ 636 #ifdef VERBOSE_INIT_ARM 637 printf("vectors "); 638 #endif 639 data_abort_handler_address = (u_int)data_abort_handler; 640 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 641 undefined_handler_address = (u_int)undefinedinstruction_bounce; 642 #ifdef VERBOSE_INIT_ARM 643 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 644 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 645 printf("undefined_handler_address = %08x\n", undefined_handler_address); 646 #endif 647 648 /* Initialise the undefined instruction handlers */ 649 #ifdef VERBOSE_INIT_ARM 650 printf("undefined "); 651 #endif 652 undefined_init(); 653 654 /* Load memory into UVM. */ 655 #ifdef VERBOSE_INIT_ARM 656 printf("page "); 657 #endif 658 uvm_md_init(); 659 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 660 atop(physical_freestart), atop(physical_freeend), 661 VM_FREELIST_DEFAULT); 662 663 /* Boot strap pmap telling it where managed kernel virtual memory is */ 664 #ifdef VERBOSE_INIT_ARM 665 printf("pmap "); 666 #endif 667 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 668 669 /* Setup the IRQ system */ 670 #ifdef VERBOSE_INIT_ARM 671 printf("irq "); 672 #endif 673 ixp12x0_intr_init(); 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("done.\n"); 677 #endif 678 679 #ifdef VERBOSE_INIT_ARM 680 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 681 physical_freestart, free_pages, free_pages); 682 printf("freemempos=%08lx\n", freemempos); 683 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 684 #endif 685 686 consinit(); 687 #ifdef VERBOSE_INIT_ARM 688 printf("consinit \n"); 689 #endif 690 691 ixdp_ixp12x0_cc_setup(); 692 693 #ifdef VERBOSE_INIT_ARM 694 printf("bootstrap done.\n"); 695 #endif 696 697 #if NKSYMS || defined(DDB) || defined(MODULAR) 698 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 699 #endif 700 701 #ifdef DDB 702 db_machine_init(); 703 if (boothowto & RB_KDB) 704 Debugger(); 705 #endif 706 707 /* We return the new stack pointer address */ 708 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 709 } 710 711 void 712 consinit(void) 713 { 714 static int consinit_called = 0; 715 716 if (consinit_called != 0) 717 return; 718 719 consinit_called = 1; 720 721 pmap_devmap_register(ixm1200_devmap); 722 723 if (ixpcomcnattach(&ixp12x0_bs_tag, 724 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 725 CONSPEED, CONMODE)) 726 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 727 } 728 729 /* 730 * For optimal cache cleaning we need two 16K banks of 731 * virtual address space that NOTHING else will access 732 * and then we alternate the cache cleaning between the 733 * two banks. 734 * The cache cleaning code requires 2 banks aligned 735 * on total size boundary so the banks can be alternated by 736 * xorring the size bit (assumes the bank size is a power of 2) 737 */ 738 void 739 ixdp_ixp12x0_cc_setup(void) 740 { 741 int loop; 742 paddr_t kaddr; 743 744 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 745 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 746 pt_entry_t * const ptep = vtopte(ixp12x0_cc_base + loop); 747 const pt_entry_t npte = L2_S_PROTO | kaddr | 748 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 749 l2pte_set(ptep, npte, 0); 750 PTE_SYNC(ptep); 751 } 752 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 753 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 754 } 755
Indexes created Thu Oct 02 14:10:14 GMT 2025