Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/arm/xscale/i80321/ep80219_machdep.c
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1 /* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * RiscBSD kernel project 38 * 39 * machdep.c 40 * 41 * Machine dependant functions for kernel setup 42 * 43 * This file needs a lot of work. 44 * 45 * Created : 17/09/94 46 */ 47 48 #include "opt_msgbuf.h" 49 #include "opt_ddb.h" 50 51 #include <sys/cdefs.h> 52 __FBSDID("$FreeBSD$"); 53 54 #define _ARM32_BUS_DMA_PRIVATE 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/sysproto.h> 58 #include <sys/signalvar.h> 59 #include <sys/imgact.h> 60 #include <sys/kernel.h> 61 #include <sys/ktr.h> 62 #include <sys/linker.h> 63 #include <sys/lock.h> 64 #include <sys/malloc.h> 65 #include <sys/mutex.h> 66 #include <sys/pcpu.h> 67 #include <sys/proc.h> 68 #include <sys/ptrace.h> 69 #include <sys/cons.h> 70 #include <sys/bio.h> 71 #include <sys/bus.h> 72 #include <sys/buf.h> 73 #include <sys/exec.h> 74 #include <sys/kdb.h> 75 #include <sys/msgbuf.h> 76 #include <machine/reg.h> 77 #include <machine/cpu.h> 78 79 #include <vm/vm.h> 80 #include <vm/pmap.h> 81 #include <vm/vm_object.h> 82 #include <vm/vm_page.h> 83 #include <vm/vm_pager.h> 84 #include <vm/vm_map.h> 85 #include <vm/vnode_pager.h> 86 #include <machine/pmap.h> 87 #include <machine/vmparam.h> 88 #include <machine/pcb.h> 89 #include <machine/undefined.h> 90 #include <machine/machdep.h> 91 #include <machine/metadata.h> 92 #include <machine/armreg.h> 93 #include <machine/bus.h> 94 #include <sys/reboot.h> 95 96 #include <arm/xscale/i80321/i80321reg.h> 97 #include <arm/xscale/i80321/i80321var.h> 98 #include <arm/xscale/i80321/iq80321reg.h> 99 #include <arm/xscale/i80321/obiovar.h> 100 101 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 102 #define KERNEL_PT_IOPXS 1 103 #define KERNEL_PT_BEFOREKERN 2 104 #define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */ 105 #define KERNEL_PT_AFKERNEL_NUM 9 106 107 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */ 108 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM) 109 110 /* Define various stack sizes in pages */ 111 #define IRQ_STACK_SIZE 1 112 #define ABT_STACK_SIZE 1 113 #ifdef IPKDB 114 #define UND_STACK_SIZE 2 115 #else 116 #define UND_STACK_SIZE 1 117 #endif 118 119 extern u_int data_abort_handler_address; 120 extern u_int prefetch_abort_handler_address; 121 extern u_int undefined_handler_address; 122 123 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 124 125 extern void *_end; 126 127 extern int *end; 128 129 struct pcpu __pcpu; 130 struct pcpu *pcpup = &__pcpu; 131 132 /* Physical and virtual addresses for some global pages */ 133 134 vm_paddr_t phys_avail[10]; 135 vm_paddr_t dump_avail[4]; 136 vm_offset_t physical_pages; 137 vm_offset_t clean_sva, clean_eva; 138 139 struct pv_addr systempage; 140 struct pv_addr msgbufpv; 141 struct pv_addr irqstack; 142 struct pv_addr undstack; 143 struct pv_addr abtstack; 144 struct pv_addr kernelstack; 145 struct pv_addr minidataclean; 146 147 static struct trapframe proc0_tf; 148 149 150 /* #define IQ80321_OBIO_BASE 0xfe800000UL */ 151 /* #define IQ80321_OBIO_SIZE 0x00100000UL */ 152 153 /* Static device mappings. */ 154 static const struct pmap_devmap ep80219_devmap[] = { 155 /* 156 * Map the on-board devices VA == PA so that we can access them 157 * with the MMU on or off. 158 */ 159 { 160 IQ80321_OBIO_BASE, 161 IQ80321_OBIO_BASE, 162 IQ80321_OBIO_SIZE, 163 VM_PROT_READ|VM_PROT_WRITE, 164 PTE_NOCACHE, 165 }, 166 { 167 IQ80321_IOW_VBASE, 168 VERDE_OUT_XLATE_IO_WIN0_BASE, 169 VERDE_OUT_XLATE_IO_WIN_SIZE, 170 VM_PROT_READ|VM_PROT_WRITE, 171 PTE_NOCACHE, 172 }, 173 { 174 IQ80321_80321_VBASE, 175 VERDE_PMMR_BASE, 176 VERDE_PMMR_SIZE, 177 VM_PROT_READ|VM_PROT_WRITE, 178 PTE_NOCACHE, 179 }, 180 { 181 0, 182 0, 183 0, 184 0, 185 0, 186 } 187 }; 188 189 #ifdef DDB 190 extern vm_offset_t ksym_start, ksym_end; 191 #endif 192 193 extern vm_offset_t xscale_cache_clean_addr; 194 195 void * 196 initarm(void *arg, void *arg2) 197 { 198 struct pv_addr kernel_l1pt; 199 int loop; 200 u_int l1pagetable; 201 vm_offset_t freemempos; 202 vm_offset_t freemem_pt; 203 vm_offset_t afterkern; 204 vm_offset_t freemem_after; 205 vm_offset_t lastaddr; 206 #ifdef DDB 207 vm_offset_t zstart = 0, zend = 0; 208 #endif 209 int i = 0; 210 uint32_t fake_preload[35]; 211 uint32_t memsize, memstart; 212 213 i = 0; 214 215 set_cpufuncs(); 216 fake_preload[i++] = MODINFO_NAME; 217 fake_preload[i++] = strlen("elf kernel") + 1; 218 strcpy((char*)&fake_preload[i++], "elf kernel"); 219 i += 2; 220 fake_preload[i++] = MODINFO_TYPE; 221 fake_preload[i++] = strlen("elf kernel") + 1; 222 strcpy((char*)&fake_preload[i++], "elf kernel"); 223 i += 2; 224 fake_preload[i++] = MODINFO_ADDR; 225 fake_preload[i++] = sizeof(vm_offset_t); 226 fake_preload[i++] = KERNBASE + 0x00200000; 227 fake_preload[i++] = MODINFO_SIZE; 228 fake_preload[i++] = sizeof(uint32_t); 229 fake_preload[i++] = (uint32_t)&end - KERNBASE - 0x00200000; 230 #ifdef DDB 231 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) { 232 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM; 233 fake_preload[i++] = sizeof(vm_offset_t); 234 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4); 235 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM; 236 fake_preload[i++] = sizeof(vm_offset_t); 237 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8); 238 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8); 239 zend = lastaddr; 240 zstart = *(uint32_t *)(KERNVIRTADDR + 4); 241 ksym_start = zstart; 242 ksym_end = zend; 243 } else 244 #endif 245 lastaddr = (vm_offset_t)&end; 246 247 fake_preload[i++] = 0; 248 fake_preload[i] = 0; 249 preload_metadata = (void *)fake_preload; 250 251 252 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 253 PCPU_SET(curthread, &thread0); 254 255 #define KERNEL_TEXT_BASE (KERNBASE + 0x00200000) 256 freemempos = 0xa0200000; 257 /* Define a macro to simplify memory allocation */ 258 #define valloc_pages(var, np) \ 259 alloc_pages((var).pv_pa, (np)); \ 260 (var).pv_va = (var).pv_pa + 0x20000000; 261 262 #define alloc_pages(var, np) \ 263 freemempos -= (np * PAGE_SIZE); \ 264 (var) = freemempos; \ 265 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 266 267 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 268 freemempos -= PAGE_SIZE; 269 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 270 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 271 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 272 valloc_pages(kernel_pt_table[loop], 273 L2_TABLE_SIZE / PAGE_SIZE); 274 } else { 275 kernel_pt_table[loop].pv_pa = freemempos + 276 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 277 L2_TABLE_SIZE_REAL; 278 kernel_pt_table[loop].pv_va = 279 kernel_pt_table[loop].pv_pa + 0x20000000; 280 } 281 i++; 282 } 283 freemem_pt = freemempos; 284 freemempos = 0xa0100000; 285 /* 286 * Allocate a page for the system page mapped to V0x00000000 287 * This page will just contain the system vectors and can be 288 * shared by all processes. 289 */ 290 valloc_pages(systempage, 1); 291 292 /* Allocate stacks for all modes */ 293 valloc_pages(irqstack, IRQ_STACK_SIZE); 294 valloc_pages(abtstack, ABT_STACK_SIZE); 295 valloc_pages(undstack, UND_STACK_SIZE); 296 valloc_pages(kernelstack, KSTACK_PAGES); 297 alloc_pages(minidataclean.pv_pa, 1); 298 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE); 299 #ifdef ARM_USE_SMALL_ALLOC 300 freemempos -= PAGE_SIZE; 301 freemem_pt = trunc_page(freemem_pt); 302 freemem_after = freemempos - ((freemem_pt - 0xa0100000) / 303 PAGE_SIZE) * sizeof(struct arm_small_page); 304 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000) 305 , (void *)0xc0100000, freemem_pt - 0xa0100000, 1); 306 freemem_after -= ((freemem_after - 0xa0001000) / PAGE_SIZE) * 307 sizeof(struct arm_small_page); 308 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000), 309 (void *)0xc0001000, 310 trunc_page(freemem_after) - 0xa0001000, 0); 311 312 freemempos = trunc_page(freemem_after); 313 freemempos -= PAGE_SIZE; 314 #endif 315 /* 316 * Allocate memory for the l1 and l2 page tables. The scheme to avoid 317 * wasting memory by allocating the l1pt on the first 16k memory was 318 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for 319 * this to work (which is supposed to be the case). 320 */ 321 322 /* 323 * Now we start construction of the L1 page table 324 * We start by mapping the L2 page tables into the L1. 325 * This means that we can replace L1 mappings later on if necessary 326 */ 327 l1pagetable = kernel_l1pt.pv_va; 328 329 /* Map the L2 pages tables in the L1 page table */ 330 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1), 331 &kernel_pt_table[KERNEL_PT_SYS]); 332 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE, 333 &kernel_pt_table[KERNEL_PT_IOPXS]); 334 pmap_link_l2pt(l1pagetable, KERNBASE, 335 &kernel_pt_table[KERNEL_PT_BEFOREKERN]); 336 pmap_map_chunk(l1pagetable, KERNBASE, IQ80321_SDRAM_START, 0x100000, 337 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 338 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, IQ80321_SDRAM_START + 0x100000, 339 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 340 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, IQ80321_SDRAM_START + 0x200000, 341 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1), 342 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 343 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1); 344 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 345 - 1)); 346 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 347 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 348 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 349 } 350 pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa, 351 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 352 353 354 #ifdef ARM_USE_SMALL_ALLOC 355 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) { 356 arm_add_smallalloc_pages((void *)(freemem_after), 357 (void*)(freemem_after + PAGE_SIZE), 358 afterkern - (freemem_after + PAGE_SIZE), 0); 359 360 } 361 #endif 362 363 /* Map the Mini-Data cache clean area. */ 364 xscale_setup_minidata(l1pagetable, afterkern, 365 minidataclean.pv_pa); 366 367 /* Map the vector page. */ 368 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 369 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 370 pmap_devmap_bootstrap(l1pagetable, ep80219_devmap); 371 /* 372 * Give the XScale global cache clean code an appropriately 373 * sized chunk of unmapped VA space starting at 0xff000000 374 * (our device mappings end before this address). 375 */ 376 xscale_cache_clean_addr = 0xff000000U; 377 378 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 379 setttb(kernel_l1pt.pv_pa); 380 cpu_tlb_flushID(); 381 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 382 /* 383 * Pages were allocated during the secondary bootstrap for the 384 * stacks for different CPU modes. 385 * We must now set the r13 registers in the different CPU modes to 386 * point to these stacks. 387 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 388 * of the stack memory. 389 */ 390 391 392 set_stackptr(PSR_IRQ32_MODE, 393 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 394 set_stackptr(PSR_ABT32_MODE, 395 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 396 set_stackptr(PSR_UND32_MODE, 397 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 398 399 400 401 /* 402 * We must now clean the cache again.... 403 * Cleaning may be done by reading new data to displace any 404 * dirty data in the cache. This will have happened in setttb() 405 * but since we are boot strapping the addresses used for the read 406 * may have just been remapped and thus the cache could be out 407 * of sync. A re-clean after the switch will cure this. 408 * After booting there are no gross reloations of the kernel thus 409 * this problem will not occur after initarm(). 410 */ 411 cpu_idcache_wbinv_all(); 412 /* 413 * Fetch the SDRAM start/size from the i80321 SDRAM configration 414 * registers. 415 */ 416 i80321_calibrate_delay(); 417 i80321_sdram_bounds(&obio_bs_tag, IQ80321_80321_VBASE + VERDE_MCU_BASE, 418 &memstart, &memsize); 419 physmem = memsize / PAGE_SIZE; 420 cninit(); 421 422 /* Set stack for exception handlers */ 423 424 data_abort_handler_address = (u_int)data_abort_handler; 425 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 426 undefined_handler_address = (u_int)undefinedinstruction_bounce; 427 undefined_init(); 428 429 proc_linkup0(&proc0, &thread0); 430 thread0.td_kstack = kernelstack.pv_va; 431 thread0.td_pcb = (struct pcb *) 432 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 433 thread0.td_pcb->pcb_flags = 0; 434 thread0.td_frame = &proc0_tf; 435 pcpup->pc_curpcb = thread0.td_pcb; 436 437 /* Enable MMU, I-cache, D-cache, write buffer. */ 438 439 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 440 441 442 443 pmap_curmaxkvaddr = afterkern + PAGE_SIZE; 444 dump_avail[0] = 0xa0000000; 445 dump_avail[1] = 0xa0000000 + memsize; 446 dump_avail[2] = 0; 447 dump_avail[3] = 0; 448 pmap_bootstrap(pmap_curmaxkvaddr, 449 0xd0000000, &kernel_l1pt); 450 msgbufp = (void*)msgbufpv.pv_va; 451 msgbufinit(msgbufp, MSGBUF_SIZE); 452 mutex_init(); 453 454 i = 0; 455 #ifdef ARM_USE_SMALL_ALLOC 456 phys_avail[i++] = 0xa0000000; 457 phys_avail[i++] = 0xa0001000; /* 458 *XXX: Gross hack to get our 459 * pages in the vm_page_array 460 . */ 461 #endif 462 phys_avail[i++] = round_page(virtual_avail - KERNBASE + IQ80321_SDRAM_START); 463 phys_avail[i++] = trunc_page(0xa0000000 + memsize - 1); 464 phys_avail[i++] = 0; 465 phys_avail[i] = 0; 466 467 /* Do basic tuning, hz etc */ 468 init_param1(); 469 init_param2(physmem); 470 kdb_init(); 471 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 472 sizeof(struct pcb))); 473 } 474 475 extern int 476 machdep_pci_route_interrupt(device_t pcib, device_t dev, int pin) 477 { 478 int bus; 479 int device; 480 int func; 481 uint32_t busno; 482 struct i80321_pci_softc *sc = device_get_softc(pcib); 483 bus = pci_get_bus(dev); 484 device = pci_get_slot(dev); 485 func = pci_get_function(dev); 486 busno = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, ATU_PCIXSR); 487 busno = PCIXSR_BUSNO(busno); 488 if (busno == 0xff) 489 busno = 0; 490 if (bus != busno) 491 goto no_mapping; 492 switch (device) { 493 /* EP80219 PCI */ 494 case 1: /* Ethernet i82555 10/100 */ 495 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(0)); 496 return (ICU_INT_XINT(0)); 497 case 2: /* UART */ 498 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(1)); 499 return (ICU_INT_XINT(1)); 500 case 3: 501 /* 502 * The S-ATA chips are behind the bridge, and all of 503 * the S-ATA interrupts are wired together. 504 */ 505 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(2)); 506 return (ICU_INT_XINT(2)); 507 case 4: /* MINI-PIC_INT */ 508 printf("Device %d routed to irq %d\n", device, ICU_INT_XINT(3)); 509 return( ICU_INT_XINT(3)); 510 default: 511 no_mapping: 512 printf("No mapping for %d/%d/%d/%c\n", bus, device, func, pin); 513 514 } 515 return (0); 516 517 }
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