arm32_kvminit.c revision 1.19
1 /* $NetBSD: arm32_kvminit.c,v 1.19 2013/06/12 17:13:05 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec Corporation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of Genetec Corporation may not be used to endorse or 16 * promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Copyright (c) 2001 Wasabi Systems, Inc. 32 * All rights reserved. 33 * 34 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed for the NetBSD Project by 47 * Wasabi Systems, Inc. 48 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 49 * or promote products derived from this software without specific prior 50 * written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 62 * POSSIBILITY OF SUCH DAMAGE. 63 * 64 * Copyright (c) 1997,1998 Mark Brinicombe. 65 * Copyright (c) 1997,1998 Causality Limited. 66 * All rights reserved. 67 * 68 * Redistribution and use in source and binary forms, with or without 69 * modification, are permitted provided that the following conditions 70 * are met: 71 * 1. Redistributions of source code must retain the above copyright 72 * notice, this list of conditions and the following disclaimer. 73 * 2. Redistributions in binary form must reproduce the above copyright 74 * notice, this list of conditions and the following disclaimer in the 75 * documentation and/or other materials provided with the distribution. 76 * 3. All advertising materials mentioning features or use of this software 77 * must display the following acknowledgement: 78 * This product includes software developed by Mark Brinicombe 79 * for the NetBSD Project. 80 * 4. The name of the company nor the name of the author may be used to 81 * endorse or promote products derived from this software without specific 82 * prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 85 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 86 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 87 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 88 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 89 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 90 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 * 96 * Copyright (c) 2007 Microsoft 97 * All rights reserved. 98 * 99 * Redistribution and use in source and binary forms, with or without 100 * modification, are permitted provided that the following conditions 101 * are met: 102 * 1. Redistributions of source code must retain the above copyright 103 * notice, this list of conditions and the following disclaimer. 104 * 2. Redistributions in binary form must reproduce the above copyright 105 * notice, this list of conditions and the following disclaimer in the 106 * documentation and/or other materials provided with the distribution. 107 * 3. All advertising materials mentioning features or use of this software 108 * must display the following acknowledgement: 109 * This product includes software developed by Microsoft 110 * 111 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 112 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 113 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 114 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTERS BE LIABLE FOR ANY DIRECT, 115 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 116 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 117 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 118 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 119 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 120 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 121 * SUCH DAMAGE. 122 */ 123 124 #include <sys/cdefs.h> 125 __KERNEL_RCSID(0, "$NetBSD: arm32_kvminit.c,v 1.19 2013/06/12 17:13:05 matt Exp $"); 126 127 #include <sys/param.h> 128 #include <sys/device.h> 129 #include <sys/kernel.h> 130 #include <sys/reboot.h> 131 #include <sys/bus.h> 132 133 #include <dev/cons.h> 134 135 #include <uvm/uvm_extern.h> 136 137 #include <arm/db_machdep.h> 138 #include <arm/undefined.h> 139 #include <arm/bootconfig.h> 140 #include <arm/arm32/machdep.h> 141 142 #include "ksyms.h" 143 144 struct bootmem_info bootmem_info; 145 146 paddr_t msgbufphys; 147 paddr_t physical_start; 148 paddr_t physical_end; 149 150 extern char etext[]; 151 extern char __data_start[], _edata[]; 152 extern char __bss_start[], __bss_end__[]; 153 extern char _end[]; 154 155 /* Page tables for mapping kernel VM */ 156 #define KERNEL_L2PT_VMDATA_NUM 8 /* start with 32MB of KVM */ 157 158 /* 159 * Macros to translate between physical and virtual for a subset of the 160 * kernel address space. *Not* for general use. 161 */ 162 #define KERN_VTOPHYS(bmi, va) \ 163 ((paddr_t)((vaddr_t)(va) - KERNEL_BASE + (bmi)->bmi_start)) 164 #define KERN_PHYSTOV(bmi, pa) \ 165 ((vaddr_t)((paddr_t)(pa) - (bmi)->bmi_start + KERNEL_BASE)) 166 167 void 168 arm32_bootmem_init(paddr_t memstart, psize_t memsize, vsize_t kernelstart) 169 { 170 struct bootmem_info * const bmi = &bootmem_info; 171 pv_addr_t *pv = bmi->bmi_freeblocks; 172 173 #ifdef VERBOSE_INIT_ARM 174 printf("%s: memstart=%#lx, memsize=%#lx, kernelstart=%#lx\n", 175 __func__, memstart, memsize, kernelstart); 176 #endif 177 178 physical_start = bmi->bmi_start = memstart; 179 physical_end = bmi->bmi_end = memstart + memsize; 180 physmem = memsize / PAGE_SIZE; 181 182 /* 183 * Let's record where the kernel lives. 184 */ 185 bmi->bmi_kernelstart = kernelstart; 186 bmi->bmi_kernelend = KERN_VTOPHYS(bmi, round_page((vaddr_t)_end)); 187 188 #ifdef VERBOSE_INIT_ARM 189 printf("%s: kernelend=%#lx\n", __func__, bmi->bmi_kernelend); 190 #endif 191 192 /* 193 * Now the rest of the free memory must be after the kernel. 194 */ 195 pv->pv_pa = bmi->bmi_kernelend; 196 pv->pv_va = KERN_PHYSTOV(bmi, pv->pv_pa); 197 pv->pv_size = bmi->bmi_end - bmi->bmi_kernelend; 198 bmi->bmi_freepages += pv->pv_size / PAGE_SIZE; 199 #ifdef VERBOSE_INIT_ARM 200 printf("%s: adding %lu free pages: [%#lx..%#lx] (VA %#lx)\n", 201 __func__, pv->pv_size / PAGE_SIZE, pv->pv_pa, 202 pv->pv_pa + pv->pv_size - 1, pv->pv_va); 203 #endif 204 pv++; 205 206 /* 207 * Add a free block for any memory before the kernel. 208 */ 209 if (bmi->bmi_start < bmi->bmi_kernelstart) { 210 pv->pv_pa = bmi->bmi_start; 211 pv->pv_va = KERNEL_BASE; 212 pv->pv_size = bmi->bmi_kernelstart - bmi->bmi_start; 213 bmi->bmi_freepages += pv->pv_size / PAGE_SIZE; 214 #ifdef VERBOSE_INIT_ARM 215 printf("%s: adding %lu free pages: [%#lx..%#lx] (VA %#lx)\n", 216 __func__, pv->pv_size / PAGE_SIZE, pv->pv_pa, 217 pv->pv_pa + pv->pv_size - 1, pv->pv_va); 218 #endif 219 pv++; 220 } 221 222 bmi->bmi_nfreeblocks = pv - bmi->bmi_freeblocks; 223 224 SLIST_INIT(&bmi->bmi_freechunks); 225 SLIST_INIT(&bmi->bmi_chunks); 226 } 227 228 static bool 229 concat_pvaddr(pv_addr_t *acc_pv, pv_addr_t *pv) 230 { 231 if (acc_pv->pv_pa + acc_pv->pv_size == pv->pv_pa 232 && acc_pv->pv_va + acc_pv->pv_size == pv->pv_va 233 && acc_pv->pv_prot == pv->pv_prot 234 && acc_pv->pv_cache == pv->pv_cache) { 235 #ifdef VERBOSE_INIT_ARMX 236 printf("%s: appending pv %p (%#lx..%#lx) to %#lx..%#lx\n", 237 __func__, pv, pv->pv_pa, pv->pv_pa + pv->pv_size + 1, 238 acc_pv->pv_pa, acc_pv->pv_pa + acc_pv->pv_size + 1); 239 #endif 240 acc_pv->pv_size += pv->pv_size; 241 return true; 242 } 243 244 return false; 245 } 246 247 static void 248 add_pages(struct bootmem_info *bmi, pv_addr_t *pv) 249 { 250 pv_addr_t **pvp = &SLIST_FIRST(&bmi->bmi_chunks); 251 while ((*pvp) != NULL && (*pvp)->pv_va <= pv->pv_va) { 252 pv_addr_t * const pv0 = (*pvp); 253 KASSERT(SLIST_NEXT(pv0, pv_list) == NULL || pv0->pv_pa < SLIST_NEXT(pv0, pv_list)->pv_pa); 254 if (concat_pvaddr(pv0, pv)) { 255 #ifdef VERBOSE_INIT_ARM 256 printf("%s: %s pv %p (%#lx..%#lx) to %#lx..%#lx\n", 257 __func__, "appending", pv, 258 pv->pv_pa, pv->pv_pa + pv->pv_size - 1, 259 pv0->pv_pa, pv0->pv_pa + pv0->pv_size - pv->pv_size - 1); 260 #endif 261 pv = SLIST_NEXT(pv0, pv_list); 262 if (pv != NULL && concat_pvaddr(pv0, pv)) { 263 #ifdef VERBOSE_INIT_ARM 264 printf("%s: %s pv %p (%#lx..%#lx) to %#lx..%#lx\n", 265 __func__, "merging", pv, 266 pv->pv_pa, pv->pv_pa + pv->pv_size - 1, 267 pv0->pv_pa, 268 pv0->pv_pa + pv0->pv_size - pv->pv_size - 1); 269 #endif 270 SLIST_REMOVE_AFTER(pv0, pv_list); 271 SLIST_INSERT_HEAD(&bmi->bmi_freechunks, pv, pv_list); 272 } 273 return; 274 } 275 KASSERT(pv->pv_va != (*pvp)->pv_va); 276 pvp = &SLIST_NEXT(*pvp, pv_list); 277 } 278 KASSERT((*pvp) == NULL || pv->pv_va < (*pvp)->pv_va); 279 pv_addr_t * const new_pv = SLIST_FIRST(&bmi->bmi_freechunks); 280 KASSERT(new_pv != NULL); 281 SLIST_REMOVE_HEAD(&bmi->bmi_freechunks, pv_list); 282 *new_pv = *pv; 283 SLIST_NEXT(new_pv, pv_list) = *pvp; 284 (*pvp) = new_pv; 285 #ifdef VERBOSE_INIT_ARM 286 printf("%s: adding pv %p (pa %#lx, va %#lx, %lu pages) ", 287 __func__, new_pv, new_pv->pv_pa, new_pv->pv_va, 288 new_pv->pv_size / PAGE_SIZE); 289 if (SLIST_NEXT(new_pv, pv_list)) 290 printf("before pa %#lx\n", SLIST_NEXT(new_pv, pv_list)->pv_pa); 291 else 292 printf("at tail\n"); 293 #endif 294 } 295 296 static void 297 valloc_pages(struct bootmem_info *bmi, pv_addr_t *pv, size_t npages, 298 int prot, int cache, bool zero_p) 299 { 300 size_t nbytes = npages * PAGE_SIZE; 301 pv_addr_t *free_pv = bmi->bmi_freeblocks; 302 size_t free_idx = 0; 303 static bool l1pt_found; 304 305 /* 306 * If we haven't allocated the kernel L1 page table and we are aligned 307 * at a L1 table boundary, alloc the memory for it. 308 */ 309 if (!l1pt_found 310 && (free_pv->pv_pa & (L1_TABLE_SIZE - 1)) == 0 311 && free_pv->pv_size >= L1_TABLE_SIZE) { 312 l1pt_found = true; 313 valloc_pages(bmi, &kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE, 314 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true); 315 add_pages(bmi, &kernel_l1pt); 316 } 317 318 while (nbytes > free_pv->pv_size) { 319 free_pv++; 320 free_idx++; 321 if (free_idx == bmi->bmi_nfreeblocks) { 322 panic("%s: could not allocate %zu bytes", 323 __func__, nbytes); 324 } 325 } 326 327 /* 328 * As we allocate the memory, make sure that we don't walk over 329 * our current first level translation table. 330 */ 331 KASSERT((armreg_ttbr_read() & ~(L1_TABLE_SIZE - 1)) != free_pv->pv_pa); 332 333 pv->pv_pa = free_pv->pv_pa; 334 pv->pv_va = free_pv->pv_va; 335 pv->pv_size = nbytes; 336 pv->pv_prot = prot; 337 pv->pv_cache = cache; 338 339 /* 340 * If PTE_PAGETABLE uses the same cache modes as PTE_CACHE 341 * just use PTE_CACHE. 342 */ 343 if (cache == PTE_PAGETABLE 344 && pte_l1_s_cache_mode == pte_l1_s_cache_mode_pt 345 && pte_l2_l_cache_mode == pte_l2_l_cache_mode_pt 346 && pte_l2_s_cache_mode == pte_l2_s_cache_mode_pt) 347 pv->pv_cache = PTE_CACHE; 348 349 free_pv->pv_pa += nbytes; 350 free_pv->pv_va += nbytes; 351 free_pv->pv_size -= nbytes; 352 if (free_pv->pv_size == 0) { 353 --bmi->bmi_nfreeblocks; 354 for (; free_idx < bmi->bmi_nfreeblocks; free_idx++) { 355 free_pv[0] = free_pv[1]; 356 } 357 } 358 359 bmi->bmi_freepages -= npages; 360 361 if (zero_p) 362 memset((void *)pv->pv_va, 0, nbytes); 363 } 364 365 void 366 arm32_kernel_vm_init(vaddr_t kernel_vm_base, vaddr_t vectors, vaddr_t iovbase, 367 const struct pmap_devmap *devmap, bool mapallmem_p) 368 { 369 struct bootmem_info * const bmi = &bootmem_info; 370 #ifdef MULTIPROCESSOR 371 const size_t cpu_num = arm_cpu_max + 1; 372 #else 373 const size_t cpu_num = 1; 374 #endif 375 #if defined(CPU_ARMV7) || defined(CPU_ARM11) 376 const bool map_vectors_p = vectors == ARM_VECTORS_LOW 377 && !(armreg_pfr1_read() & ARM_PFR1_SEC_MASK); 378 #else 379 const bool map_vectors_p = true; 380 #endif 381 382 #ifdef __HAVE_MM_MD_DIRECT_MAPPED_PHYS 383 KASSERT(mapallmem_p); 384 #endif 385 386 /* 387 * Calculate the number of L2 pages needed for mapping the 388 * kernel + data + stuff. Assume 2 L2 pages for kernel, 1 for vectors, 389 * and 1 for IO 390 */ 391 size_t kernel_size = bmi->bmi_kernelend; 392 kernel_size -= (bmi->bmi_kernelstart & -L2_S_SEGSIZE); 393 kernel_size += L1_TABLE_SIZE; 394 kernel_size += L2_TABLE_SIZE * (2 + 1 + KERNEL_L2PT_VMDATA_NUM + 1); 395 kernel_size += 396 cpu_num * (ABT_STACK_SIZE + FIQ_STACK_SIZE + IRQ_STACK_SIZE 397 + UND_STACK_SIZE + UPAGES) * PAGE_SIZE; 398 kernel_size += round_page(MSGBUFSIZE); 399 kernel_size += 0x10000; /* slop */ 400 kernel_size += PAGE_SIZE * (kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE; 401 kernel_size = round_page(kernel_size); 402 403 /* 404 * Now we know how many L2 pages it will take. 405 */ 406 const size_t KERNEL_L2PT_KERNEL_NUM = 407 (kernel_size + L2_S_SEGSIZE - 1) / L2_S_SEGSIZE; 408 409 #ifdef VERBOSE_INIT_ARM 410 printf("%s: %zu L2 pages are needed to map %#zx kernel bytes\n", 411 __func__, KERNEL_L2PT_KERNEL_NUM, kernel_size); 412 #endif 413 414 KASSERT(KERNEL_L2PT_KERNEL_NUM + KERNEL_L2PT_VMDATA_NUM < __arraycount(bmi->bmi_l2pts)); 415 pv_addr_t * const kernel_l2pt = bmi->bmi_l2pts; 416 pv_addr_t * const vmdata_l2pt = kernel_l2pt + KERNEL_L2PT_KERNEL_NUM; 417 pv_addr_t msgbuf; 418 pv_addr_t text; 419 pv_addr_t data; 420 pv_addr_t chunks[KERNEL_L2PT_KERNEL_NUM+KERNEL_L2PT_VMDATA_NUM+11]; 421 #if ARM_MMU_XSCALE == 1 422 pv_addr_t minidataclean; 423 #endif 424 425 /* 426 * We need to allocate some fixed page tables to get the kernel going. 427 * 428 * We are going to allocate our bootstrap pages from the beginning of 429 * the free space that we just calculated. We allocate one page 430 * directory and a number of page tables and store the physical 431 * addresses in the bmi_l2pts array in bootmem_info. 432 * 433 * The kernel page directory must be on a 16K boundary. The page 434 * tables must be on 4K boundaries. What we do is allocate the 435 * page directory on the first 16K boundary that we encounter, and 436 * the page tables on 4K boundaries otherwise. Since we allocate 437 * at least 3 L2 page tables, we are guaranteed to encounter at 438 * least one 16K aligned region. 439 */ 440 441 #ifdef VERBOSE_INIT_ARM 442 printf("%s: allocating page tables for", __func__); 443 #endif 444 for (size_t i = 0; i < __arraycount(chunks); i++) { 445 SLIST_INSERT_HEAD(&bmi->bmi_freechunks, &chunks[i], pv_list); 446 } 447 448 kernel_l1pt.pv_pa = 0; 449 kernel_l1pt.pv_va = 0; 450 451 /* 452 * Allocate the L2 pages, but if we get to a page that is aligned for 453 * an L1 page table, we will allocate the pages for it first and then 454 * allocate the L2 page. 455 */ 456 457 if (map_vectors_p) { 458 /* 459 * First allocate L2 page for the vectors. 460 */ 461 #ifdef VERBOSE_INIT_ARM 462 printf(" vector"); 463 #endif 464 valloc_pages(bmi, &bmi->bmi_vector_l2pt, 465 L2_TABLE_SIZE / PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, 466 PTE_PAGETABLE, true); 467 add_pages(bmi, &bmi->bmi_vector_l2pt); 468 } 469 470 /* 471 * Now allocate L2 pages for the kernel 472 */ 473 #ifdef VERBOSE_INIT_ARM 474 printf(" kernel"); 475 #endif 476 for (size_t idx = 0; idx < KERNEL_L2PT_KERNEL_NUM; ++idx) { 477 valloc_pages(bmi, &kernel_l2pt[idx], L2_TABLE_SIZE / PAGE_SIZE, 478 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true); 479 add_pages(bmi, &kernel_l2pt[idx]); 480 } 481 482 /* 483 * Now allocate L2 pages for the initial kernel VA space. 484 */ 485 #ifdef VERBOSE_INIT_ARM 486 printf(" vm"); 487 #endif 488 for (size_t idx = 0; idx < KERNEL_L2PT_VMDATA_NUM; ++idx) { 489 valloc_pages(bmi, &vmdata_l2pt[idx], L2_TABLE_SIZE / PAGE_SIZE, 490 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true); 491 add_pages(bmi, &vmdata_l2pt[idx]); 492 } 493 494 /* 495 * If someone wanted a L2 page for I/O, allocate it now. 496 */ 497 if (iovbase != 0) { 498 #ifdef VERBOSE_INIT_ARM 499 printf(" io"); 500 #endif 501 valloc_pages(bmi, &bmi->bmi_io_l2pt, L2_TABLE_SIZE / PAGE_SIZE, 502 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE, true); 503 add_pages(bmi, &bmi->bmi_io_l2pt); 504 } 505 506 #ifdef VERBOSE_ARM_INIT 507 printf("%s: allocating stacks\n", __func__); 508 #endif 509 510 /* Allocate stacks for all modes and CPUs */ 511 valloc_pages(bmi, &abtstack, ABT_STACK_SIZE * cpu_num, 512 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 513 add_pages(bmi, &abtstack); 514 valloc_pages(bmi, &fiqstack, FIQ_STACK_SIZE * cpu_num, 515 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 516 add_pages(bmi, &fiqstack); 517 valloc_pages(bmi, &irqstack, IRQ_STACK_SIZE * cpu_num, 518 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 519 add_pages(bmi, &irqstack); 520 valloc_pages(bmi, &undstack, UND_STACK_SIZE * cpu_num, 521 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 522 add_pages(bmi, &undstack); 523 valloc_pages(bmi, &idlestack, UPAGES * cpu_num, /* SVC32 */ 524 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 525 add_pages(bmi, &idlestack); 526 valloc_pages(bmi, &kernelstack, UPAGES, /* SVC32 */ 527 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, true); 528 add_pages(bmi, &kernelstack); 529 530 /* Allocate the message buffer from the end of memory. */ 531 const size_t msgbuf_pgs = round_page(MSGBUFSIZE) / PAGE_SIZE; 532 valloc_pages(bmi, &msgbuf, msgbuf_pgs, 533 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE, false); 534 add_pages(bmi, &msgbuf); 535 msgbufphys = msgbuf.pv_pa; 536 537 if (map_vectors_p) { 538 /* 539 * Allocate a page for the system vector page. 540 * This page will just contain the system vectors and can be 541 * shared by all processes. 542 */ 543 valloc_pages(bmi, &systempage, 1, VM_PROT_READ|VM_PROT_WRITE, 544 PTE_CACHE, true); 545 } 546 systempage.pv_va = vectors; 547 548 /* 549 * If the caller needed a few extra pages for some reason, allocate 550 * them now. 551 */ 552 #if ARM_MMU_XSCALE == 1 553 #if (ARM_NMMUS > 1) 554 if (xscale_use_minidata) 555 #endif 556 valloc_pages(bmi, extrapv, nextrapages, 557 VM_PROT_READ|VM_PROT_WRITE, 0, true); 558 #endif 559 560 /* 561 * Ok we have allocated physical pages for the primary kernel 562 * page tables and stacks. Let's just confirm that. 563 */ 564 if (kernel_l1pt.pv_va == 0 565 && (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0)) 566 panic("%s: Failed to allocate or align the kernel " 567 "page directory", __func__); 568 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 572 #endif 573 574 /* 575 * Now we start construction of the L1 page table 576 * We start by mapping the L2 page tables into the L1. 577 * This means that we can replace L1 mappings later on if necessary 578 */ 579 vaddr_t l1pt_va = kernel_l1pt.pv_va; 580 paddr_t l1pt_pa = kernel_l1pt.pv_pa; 581 582 if (map_vectors_p) { 583 /* Map the L2 pages tables in the L1 page table */ 584 pmap_link_l2pt(l1pt_va, systempage.pv_va & -L2_S_SEGSIZE, 585 &bmi->bmi_vector_l2pt); 586 #ifdef VERBOSE_INIT_ARM 587 printf("%s: adding L2 pt (VA %#lx, PA %#lx) " 588 "for VA %#lx\n (vectors)", 589 __func__, bmi->bmi_vector_l2pt.pv_va, 590 bmi->bmi_vector_l2pt.pv_pa, systempage.pv_va); 591 #endif 592 } 593 594 const vaddr_t kernel_base = 595 KERN_PHYSTOV(bmi, bmi->bmi_kernelstart & -L2_S_SEGSIZE); 596 for (size_t idx = 0; idx < KERNEL_L2PT_KERNEL_NUM; idx++) { 597 pmap_link_l2pt(l1pt_va, kernel_base + idx * L2_S_SEGSIZE, 598 &kernel_l2pt[idx]); 599 #ifdef VERBOSE_INIT_ARM 600 printf("%s: adding L2 pt (VA %#lx, PA %#lx) for VA %#lx (kernel)\n", 601 __func__, kernel_l2pt[idx].pv_va, kernel_l2pt[idx].pv_pa, 602 kernel_base + idx * L2_S_SEGSIZE); 603 #endif 604 } 605 606 for (size_t idx = 0; idx < KERNEL_L2PT_VMDATA_NUM; idx++) { 607 pmap_link_l2pt(l1pt_va, kernel_vm_base + idx * L2_S_SEGSIZE, 608 &vmdata_l2pt[idx]); 609 #ifdef VERBOSE_INIT_ARM 610 printf("%s: adding L2 pt (VA %#lx, PA %#lx) for VA %#lx (vm)\n", 611 __func__, vmdata_l2pt[idx].pv_va, vmdata_l2pt[idx].pv_pa, 612 kernel_vm_base + idx * L2_S_SEGSIZE); 613 #endif 614 } 615 if (iovbase) { 616 pmap_link_l2pt(l1pt_va, iovbase & -L2_S_SEGSIZE, &bmi->bmi_io_l2pt); 617 #ifdef VERBOSE_INIT_ARM 618 printf("%s: adding L2 pt (VA %#lx, PA %#lx) for VA %#lx (io)\n", 619 __func__, bmi->bmi_io_l2pt.pv_va, bmi->bmi_io_l2pt.pv_pa, 620 iovbase & -L2_S_SEGSIZE); 621 #endif 622 } 623 624 /* update the top of the kernel VM */ 625 pmap_curmaxkvaddr = 626 kernel_vm_base + (KERNEL_L2PT_VMDATA_NUM * L2_S_SEGSIZE); 627 628 #ifdef VERBOSE_INIT_ARM 629 printf("Mapping kernel\n"); 630 #endif 631 632 extern char etext[], _end[]; 633 size_t totalsize = bmi->bmi_kernelend - bmi->bmi_kernelstart; 634 size_t textsize = KERN_VTOPHYS(bmi, (uintptr_t)etext) - bmi->bmi_kernelstart; 635 636 textsize = (textsize + PGOFSET) & ~PGOFSET; 637 638 /* start at offset of kernel in RAM */ 639 640 text.pv_pa = bmi->bmi_kernelstart; 641 text.pv_va = KERN_PHYSTOV(bmi, bmi->bmi_kernelstart); 642 text.pv_size = textsize; 643 text.pv_prot = VM_PROT_READ|VM_PROT_WRITE; /* XXX VM_PROT_EXECUTE */ 644 text.pv_cache = PTE_CACHE; 645 646 #ifdef VERBOSE_INIT_ARM 647 printf("%s: adding chunk for kernel text %#lx..%#lx (VA %#lx)\n", 648 __func__, text.pv_pa, text.pv_pa + text.pv_size - 1, text.pv_va); 649 #endif 650 651 add_pages(bmi, &text); 652 653 data.pv_pa = text.pv_pa + textsize; 654 data.pv_va = text.pv_va + textsize; 655 data.pv_size = totalsize - textsize; 656 data.pv_prot = VM_PROT_READ|VM_PROT_WRITE; 657 data.pv_cache = PTE_CACHE; 658 659 #ifdef VERBOSE_INIT_ARM 660 printf("%s: adding chunk for kernel data/bss %#lx..%#lx (VA %#lx)\n", 661 __func__, data.pv_pa, data.pv_pa + data.pv_size - 1, data.pv_va); 662 #endif 663 664 add_pages(bmi, &data); 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("Listing Chunks\n"); 668 { 669 pv_addr_t *pv; 670 SLIST_FOREACH(pv, &bmi->bmi_chunks, pv_list) { 671 printf("%s: pv %p: chunk VA %#lx..%#lx " 672 "(PA %#lx, prot %d, cache %d)\n", 673 __func__, pv, pv->pv_va, pv->pv_va + pv->pv_size - 1, 674 pv->pv_pa, pv->pv_prot, pv->pv_cache); 675 } 676 } 677 printf("\nMapping Chunks\n"); 678 #endif 679 680 pv_addr_t cur_pv; 681 pv_addr_t *pv = SLIST_FIRST(&bmi->bmi_chunks); 682 if (!mapallmem_p || pv->pv_pa == bmi->bmi_start) { 683 cur_pv = *pv; 684 pv = SLIST_NEXT(pv, pv_list); 685 } else { 686 cur_pv.pv_va = KERNEL_BASE; 687 cur_pv.pv_pa = bmi->bmi_start; 688 cur_pv.pv_size = pv->pv_pa - bmi->bmi_start; 689 cur_pv.pv_prot = VM_PROT_READ | VM_PROT_WRITE; 690 cur_pv.pv_cache = PTE_CACHE; 691 } 692 while (pv != NULL) { 693 if (mapallmem_p) { 694 if (concat_pvaddr(&cur_pv, pv)) { 695 pv = SLIST_NEXT(pv, pv_list); 696 continue; 697 } 698 if (cur_pv.pv_pa + cur_pv.pv_size < pv->pv_pa) { 699 /* 700 * See if we can extend the current pv to emcompass the 701 * hole, and if so do it and retry the concatenation. 702 */ 703 if (cur_pv.pv_prot == (VM_PROT_READ|VM_PROT_WRITE) 704 && cur_pv.pv_cache == PTE_CACHE) { 705 cur_pv.pv_size = pv->pv_pa - cur_pv.pv_va; 706 continue; 707 } 708 709 /* 710 * We couldn't so emit the current chunk and then 711 */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("%s: mapping chunk VA %#lx..%#lx " 714 "(PA %#lx, prot %d, cache %d)\n", 715 __func__, 716 cur_pv.pv_va, cur_pv.pv_va + cur_pv.pv_size - 1, 717 cur_pv.pv_pa, cur_pv.pv_prot, cur_pv.pv_cache); 718 #endif 719 pmap_map_chunk(l1pt_va, cur_pv.pv_va, cur_pv.pv_pa, 720 cur_pv.pv_size, cur_pv.pv_prot, cur_pv.pv_cache); 721 722 /* 723 * set the current chunk to the hole and try again. 724 */ 725 cur_pv.pv_pa += cur_pv.pv_size; 726 cur_pv.pv_va += cur_pv.pv_size; 727 cur_pv.pv_size = pv->pv_pa - cur_pv.pv_va; 728 cur_pv.pv_prot = VM_PROT_READ | VM_PROT_WRITE; 729 cur_pv.pv_cache = PTE_CACHE; 730 continue; 731 } 732 } 733 734 /* 735 * The new pv didn't concatenate so emit the current one 736 * and use the new pv as the current pv. 737 */ 738 #ifdef VERBOSE_INIT_ARM 739 printf("%s: mapping chunk VA %#lx..%#lx " 740 "(PA %#lx, prot %d, cache %d)\n", 741 __func__, cur_pv.pv_va, cur_pv.pv_va + cur_pv.pv_size - 1, 742 cur_pv.pv_pa, cur_pv.pv_prot, cur_pv.pv_cache); 743 #endif 744 pmap_map_chunk(l1pt_va, cur_pv.pv_va, cur_pv.pv_pa, 745 cur_pv.pv_size, cur_pv.pv_prot, cur_pv.pv_cache); 746 cur_pv = *pv; 747 pv = SLIST_NEXT(pv, pv_list); 748 } 749 750 /* 751 * If we are mapping all of memory, let's map the rest of memory. 752 */ 753 if (mapallmem_p && cur_pv.pv_pa + cur_pv.pv_size < bmi->bmi_end) { 754 if (cur_pv.pv_prot == (VM_PROT_READ | VM_PROT_WRITE) 755 && cur_pv.pv_cache == PTE_CACHE) { 756 cur_pv.pv_size = bmi->bmi_end - cur_pv.pv_pa; 757 } else { 758 #ifdef VERBOSE_INIT_ARM 759 printf("%s: mapping chunk VA %#lx..%#lx " 760 "(PA %#lx, prot %d, cache %d)\n", 761 __func__, cur_pv.pv_va, cur_pv.pv_va + cur_pv.pv_size - 1, 762 cur_pv.pv_pa, cur_pv.pv_prot, cur_pv.pv_cache); 763 #endif 764 pmap_map_chunk(l1pt_va, cur_pv.pv_va, cur_pv.pv_pa, 765 cur_pv.pv_size, cur_pv.pv_prot, cur_pv.pv_cache); 766 cur_pv.pv_pa += cur_pv.pv_size; 767 cur_pv.pv_va += cur_pv.pv_size; 768 cur_pv.pv_size = bmi->bmi_end - cur_pv.pv_pa; 769 cur_pv.pv_prot = VM_PROT_READ | VM_PROT_WRITE; 770 cur_pv.pv_cache = PTE_CACHE; 771 } 772 } 773 774 /* 775 * Now we map the final chunk. 776 */ 777 #ifdef VERBOSE_INIT_ARM 778 printf("%s: mapping last chunk VA %#lx..%#lx (PA %#lx, prot %d, cache %d)\n", 779 __func__, cur_pv.pv_va, cur_pv.pv_va + cur_pv.pv_size - 1, 780 cur_pv.pv_pa, cur_pv.pv_prot, cur_pv.pv_cache); 781 #endif 782 pmap_map_chunk(l1pt_va, cur_pv.pv_va, cur_pv.pv_pa, 783 cur_pv.pv_size, cur_pv.pv_prot, cur_pv.pv_cache); 784 785 /* 786 * Now we map the stuff that isn't directly after the kernel 787 */ 788 789 if (map_vectors_p) { 790 /* Map the vector page. */ 791 pmap_map_entry(l1pt_va, systempage.pv_va, systempage.pv_pa, 792 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 793 } 794 795 /* Map the Mini-Data cache clean area. */ 796 #if ARM_MMU_XSCALE == 1 797 #if (ARM_NMMUS > 1) 798 if (xscale_use_minidata) 799 #endif 800 xscale_setup_minidata(l1_va, minidataclean.pv_va, 801 minidataclean.pv_pa); 802 #endif 803 804 /* 805 * Map integrated peripherals at same address in first level page 806 * table so that we can continue to use console. 807 */ 808 if (devmap) 809 pmap_devmap_bootstrap(l1pt_va, devmap); 810 811 #ifdef VERBOSE_INIT_ARM 812 /* Tell the user about where all the bits and pieces live. */ 813 printf("%22s Physical Virtual Num\n", " "); 814 printf("%22s Starting Ending Starting Ending Pages\n", " "); 815 816 static const char mem_fmt[] = 817 "%20s: 0x%08lx 0x%08lx 0x%08lx 0x%08lx %u\n"; 818 static const char mem_fmt_nov[] = 819 "%20s: 0x%08lx 0x%08lx %zu\n"; 820 821 printf(mem_fmt, "SDRAM", bmi->bmi_start, bmi->bmi_end - 1, 822 KERN_PHYSTOV(bmi, bmi->bmi_start), KERN_PHYSTOV(bmi, bmi->bmi_end - 1), 823 physmem); 824 printf(mem_fmt, "text section", 825 text.pv_pa, text.pv_pa + text.pv_size - 1, 826 text.pv_va, text.pv_va + text.pv_size - 1, 827 (int)(text.pv_size / PAGE_SIZE)); 828 printf(mem_fmt, "data section", 829 KERN_VTOPHYS(bmi, __data_start), KERN_VTOPHYS(bmi, _edata), 830 (vaddr_t)__data_start, (vaddr_t)_edata, 831 (int)((round_page((vaddr_t)_edata) 832 - trunc_page((vaddr_t)__data_start)) / PAGE_SIZE)); 833 printf(mem_fmt, "bss section", 834 KERN_VTOPHYS(bmi, __bss_start), KERN_VTOPHYS(bmi, __bss_end__), 835 (vaddr_t)__bss_start, (vaddr_t)__bss_end__, 836 (int)((round_page((vaddr_t)__bss_end__) 837 - trunc_page((vaddr_t)__bss_start)) / PAGE_SIZE)); 838 printf(mem_fmt, "L1 page directory", 839 kernel_l1pt.pv_pa, kernel_l1pt.pv_pa + L1_TABLE_SIZE - 1, 840 kernel_l1pt.pv_va, kernel_l1pt.pv_va + L1_TABLE_SIZE - 1, 841 L1_TABLE_SIZE / PAGE_SIZE); 842 printf(mem_fmt, "ABT stack (CPU 0)", 843 abtstack.pv_pa, abtstack.pv_pa + (ABT_STACK_SIZE * PAGE_SIZE) - 1, 844 abtstack.pv_va, abtstack.pv_va + (ABT_STACK_SIZE * PAGE_SIZE) - 1, 845 ABT_STACK_SIZE); 846 printf(mem_fmt, "FIQ stack (CPU 0)", 847 fiqstack.pv_pa, fiqstack.pv_pa + (FIQ_STACK_SIZE * PAGE_SIZE) - 1, 848 fiqstack.pv_va, fiqstack.pv_va + (FIQ_STACK_SIZE * PAGE_SIZE) - 1, 849 FIQ_STACK_SIZE); 850 printf(mem_fmt, "IRQ stack (CPU 0)", 851 irqstack.pv_pa, irqstack.pv_pa + (IRQ_STACK_SIZE * PAGE_SIZE) - 1, 852 irqstack.pv_va, irqstack.pv_va + (IRQ_STACK_SIZE * PAGE_SIZE) - 1, 853 IRQ_STACK_SIZE); 854 printf(mem_fmt, "UND stack (CPU 0)", 855 undstack.pv_pa, undstack.pv_pa + (UND_STACK_SIZE * PAGE_SIZE) - 1, 856 undstack.pv_va, undstack.pv_va + (UND_STACK_SIZE * PAGE_SIZE) - 1, 857 UND_STACK_SIZE); 858 printf(mem_fmt, "IDLE stack (CPU 0)", 859 idlestack.pv_pa, idlestack.pv_pa + (UPAGES * PAGE_SIZE) - 1, 860 idlestack.pv_va, idlestack.pv_va + (UPAGES * PAGE_SIZE) - 1, 861 UPAGES); 862 printf(mem_fmt, "SVC stack", 863 kernelstack.pv_pa, kernelstack.pv_pa + (UPAGES * PAGE_SIZE) - 1, 864 kernelstack.pv_va, kernelstack.pv_va + (UPAGES * PAGE_SIZE) - 1, 865 UPAGES); 866 printf(mem_fmt, "Message Buffer", 867 msgbuf.pv_pa, msgbuf.pv_pa + (msgbuf_pgs * PAGE_SIZE) - 1, 868 msgbuf.pv_va, msgbuf.pv_va + (msgbuf_pgs * PAGE_SIZE) - 1, 869 (int)msgbuf_pgs); 870 if (map_vectors_p) { 871 printf(mem_fmt, "Exception Vectors", 872 systempage.pv_pa, systempage.pv_pa + PAGE_SIZE - 1, 873 systempage.pv_va, systempage.pv_va + PAGE_SIZE - 1, 874 1); 875 } 876 for (size_t i = 0; i < bmi->bmi_nfreeblocks; i++) { 877 pv = &bmi->bmi_freeblocks[i]; 878 879 printf(mem_fmt_nov, "Free Memory", 880 pv->pv_pa, pv->pv_pa + pv->pv_size - 1, 881 pv->pv_size / PAGE_SIZE); 882 } 883 #endif 884 /* 885 * Now we have the real page tables in place so we can switch to them. 886 * Once this is done we will be running with the REAL kernel page 887 * tables. 888 */ 889 890 #if defined(VERBOSE_INIT_ARM) && 0 891 printf("TTBR0=%#x", armreg_ttbr_read()); 892 #ifdef _ARM_ARCH_6 893 printf(" TTBR1=%#x TTBCR=%#x", 894 armreg_ttbr1_read(), armreg_ttbcr_read()); 895 #endif 896 printf("\n"); 897 #endif 898 899 /* Switch tables */ 900 #ifdef VERBOSE_INIT_ARM 901 printf("switching to new L1 page table @%#lx...", l1pt_pa); 902 #endif 903 904 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 905 cpu_idcache_wbinv_all(); 906 #ifdef ARM_MMU_EXTENDED 907 cpu_setttb(l1pt_pa, KERNEL_PID); 908 #else 909 cpu_setttb(l1pt_pa, true); 910 #endif 911 cpu_tlb_flushID(); 912 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 913 914 #ifdef VERBOSE_INIT_ARM 915 printf("TTBR0=%#x OK\n", armreg_ttbr_read()); 916 #endif 917 } 918
Indexes created Sun Sep 28 16:09:52 GMT 2025