crb_machdep.c revision 236987
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 <sys/cdefs.h> 49__FBSDID("$FreeBSD: head/sys/arm/xscale/i8134x/crb_machdep.c 236987 2012-06-13 04:38:09Z imp $"); 50 51#define _ARM32_BUS_DMA_PRIVATE 52#include <sys/param.h> 53#include <sys/systm.h> 54#include <sys/sysproto.h> 55#include <sys/signalvar.h> 56#include <sys/imgact.h> 57#include <sys/kernel.h> 58#include <sys/ktr.h> 59#include <sys/linker.h> 60#include <sys/lock.h> 61#include <sys/malloc.h> 62#include <sys/mutex.h> 63#include <sys/pcpu.h> 64#include <sys/proc.h> 65#include <sys/ptrace.h> 66#include <sys/cons.h> 67#include <sys/bio.h> 68#include <sys/bus.h> 69#include <sys/buf.h> 70#include <sys/exec.h> 71#include <sys/kdb.h> 72#include <sys/msgbuf.h> 73#include <machine/reg.h> 74#include <machine/cpu.h> 75 76#include <vm/vm.h> 77#include <vm/pmap.h> 78#include <vm/vm_object.h> 79#include <vm/vm_page.h> 80#include <vm/vm_pager.h> 81#include <vm/vm_map.h> 82#include <vm/vnode_pager.h> 83#include <machine/pmap.h> 84#include <machine/vmparam.h> 85#include <machine/pcb.h> 86#include <machine/undefined.h> 87#include <machine/machdep.h> 88#include <machine/metadata.h> 89#include <machine/armreg.h> 90#include <machine/bus.h> 91#include <sys/reboot.h> 92 93 94#include <arm/xscale/i80321/i80321var.h> /* For i80321_calibrate_delay() */ 95 96#include <arm/xscale/i8134x/i81342reg.h> 97#include <arm/xscale/i8134x/i81342var.h> 98#include <arm/xscale/i8134x/obiovar.h> 99 100 101#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#define UND_STACK_SIZE 1 114 115extern u_int data_abort_handler_address; 116extern u_int prefetch_abort_handler_address; 117extern u_int undefined_handler_address; 118 119struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 120extern int *end; 121 122struct pcpu __pcpu; 123struct pcpu *pcpup = &__pcpu; 124 125/* Physical and virtual addresses for some global pages */ 126 127vm_paddr_t phys_avail[10]; 128vm_paddr_t dump_avail[4]; 129vm_offset_t physical_pages; 130 131struct pv_addr systempage; 132struct pv_addr msgbufpv; 133struct pv_addr irqstack; 134struct pv_addr undstack; 135struct pv_addr abtstack; 136struct pv_addr kernelstack; 137 138/* Static device mappings. */ 139static const struct pmap_devmap iq81342_devmap[] = { 140 { 141 IOP34X_VADDR, 142 IOP34X_HWADDR, 143 IOP34X_SIZE, 144 VM_PROT_READ|VM_PROT_WRITE, 145 PTE_NOCACHE, 146 }, 147 { 148 /* 149 * Cheat and map a whole section, this will bring 150 * both PCI-X and PCI-E outbound I/O 151 */ 152 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1), 153 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1), 154 0x100000, 155 VM_PROT_READ|VM_PROT_WRITE, 156 PTE_NOCACHE, 157 }, 158 { 159 IOP34X_PCE1_VADDR, 160 IOP34X_PCE1, 161 IOP34X_PCE1_SIZE, 162 VM_PROT_READ|VM_PROT_WRITE, 163 PTE_NOCACHE, 164 }, 165 { 166 0, 167 0, 168 0, 169 0, 170 0, 171 } 172}; 173 174#define SDRAM_START 0x00000000 175 176extern vm_offset_t xscale_cache_clean_addr; 177 178void * 179initarm(struct arm_boot_params *abp) 180{ 181 struct pv_addr kernel_l1pt; 182 struct pv_addr dpcpu; 183 int loop, i; 184 u_int l1pagetable; 185 vm_offset_t freemempos; 186 vm_offset_t freemem_pt; 187 vm_offset_t afterkern; 188 vm_offset_t freemem_after; 189 vm_offset_t lastaddr; 190 uint32_t memsize, memstart; 191 192 lastaddr = parse_boot_param(abp); 193 set_cpufuncs(); 194 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 195 PCPU_SET(curthread, &thread0); 196 197 /* Do basic tuning, hz etc */ 198 init_param1(); 199 200 freemempos = 0x00200000; 201 /* Define a macro to simplify memory allocation */ 202#define valloc_pages(var, np) \ 203 alloc_pages((var).pv_pa, (np)); \ 204 (var).pv_va = (var).pv_pa + 0xc0000000; 205 206#define alloc_pages(var, np) \ 207 freemempos -= (np * PAGE_SIZE); \ 208 (var) = freemempos; \ 209 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 210 211 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 212 freemempos -= PAGE_SIZE; 213 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 214 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 215 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 216 valloc_pages(kernel_pt_table[loop], 217 L2_TABLE_SIZE / PAGE_SIZE); 218 } else { 219 kernel_pt_table[loop].pv_pa = freemempos + 220 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 221 L2_TABLE_SIZE_REAL; 222 kernel_pt_table[loop].pv_va = 223 kernel_pt_table[loop].pv_pa + 0xc0000000; 224 } 225 } 226 freemem_pt = freemempos; 227 freemempos = 0x00100000; 228 /* 229 * Allocate a page for the system page mapped to V0x00000000 230 * This page will just contain the system vectors and can be 231 * shared by all processes. 232 */ 233 valloc_pages(systempage, 1); 234 235 /* Allocate dynamic per-cpu area. */ 236 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 237 dpcpu_init((void *)dpcpu.pv_va, 0); 238 239 /* Allocate stacks for all modes */ 240 valloc_pages(irqstack, IRQ_STACK_SIZE); 241 valloc_pages(abtstack, ABT_STACK_SIZE); 242 valloc_pages(undstack, UND_STACK_SIZE); 243 valloc_pages(kernelstack, KSTACK_PAGES); 244 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 245#ifdef ARM_USE_SMALL_ALLOC 246 freemempos -= PAGE_SIZE; 247 freemem_pt = trunc_page(freemem_pt); 248 freemem_after = freemempos - ((freemem_pt - 0x00100000) / 249 PAGE_SIZE) * sizeof(struct arm_small_page); 250 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000) 251 , (void *)0xc0100000, freemem_pt - 0x00100000, 1); 252 freemem_after -= ((freemem_after - 0x00001000) / PAGE_SIZE) * 253 sizeof(struct arm_small_page); 254#if 0 255 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000) 256 , (void *)0xc0001000, trunc_page(freemem_after) - 0x00001000, 0); 257#endif 258 freemempos = trunc_page(freemem_after); 259 freemempos -= PAGE_SIZE; 260#endif 261 /* 262 * Now we start construction of the L1 page table 263 * We start by mapping the L2 page tables into the L1. 264 * This means that we can replace L1 mappings later on if necessary 265 */ 266 l1pagetable = kernel_l1pt.pv_va; 267 268 /* Map the L2 pages tables in the L1 page table */ 269 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1), 270 &kernel_pt_table[KERNEL_PT_SYS]); 271 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000, 272 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 273 274 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000, 275 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 276 277 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000, 278 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1), 279 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 280 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1); 281 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 282 - 1)); 283 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 284 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 285 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 286 } 287 288 289#ifdef ARM_USE_SMALL_ALLOC 290 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) { 291 arm_add_smallalloc_pages((void *)(freemem_after), 292 (void*)(freemem_after + PAGE_SIZE), 293 afterkern - (freemem_after + PAGE_SIZE), 0); 294 295 } 296#endif 297 298 /* Map the vector page. */ 299 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 300 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 301 pmap_devmap_bootstrap(l1pagetable, iq81342_devmap); 302 /* 303 * Give the XScale global cache clean code an appropriately 304 * sized chunk of unmapped VA space starting at 0xff000000 305 * (our device mappings end before this address). 306 */ 307 xscale_cache_clean_addr = 0xff000000U; 308 309 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 310 setttb(kernel_l1pt.pv_pa); 311 cpu_tlb_flushID(); 312 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 313 /* 314 * Pages were allocated during the secondary bootstrap for the 315 * stacks for different CPU modes. 316 * We must now set the r13 registers in the different CPU modes to 317 * point to these stacks. 318 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 319 * of the stack memory. 320 */ 321 322 323 set_stackptr(PSR_IRQ32_MODE, 324 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 325 set_stackptr(PSR_ABT32_MODE, 326 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 327 set_stackptr(PSR_UND32_MODE, 328 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 329 330 331 332 /* 333 * We must now clean the cache again.... 334 * Cleaning may be done by reading new data to displace any 335 * dirty data in the cache. This will have happened in setttb() 336 * but since we are boot strapping the addresses used for the read 337 * may have just been remapped and thus the cache could be out 338 * of sync. A re-clean after the switch will cure this. 339 * After booting there are no gross relocations of the kernel thus 340 * this problem will not occur after initarm(). 341 */ 342 cpu_idcache_wbinv_all(); 343 i80321_calibrate_delay(); 344 i81342_sdram_bounds(&obio_bs_tag, IOP34X_VADDR, &memstart, &memsize); 345 physmem = memsize / PAGE_SIZE; 346 cninit(); 347 /* Set stack for exception handlers */ 348 349 data_abort_handler_address = (u_int)data_abort_handler; 350 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 351 undefined_handler_address = (u_int)undefinedinstruction_bounce; 352 undefined_init(); 353 354 init_proc0(kernelstack.pv_va); 355 356 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 357 358 pmap_curmaxkvaddr = afterkern + PAGE_SIZE; 359 /* 360 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before 361 * calling pmap_bootstrap. 362 */ 363 dump_avail[0] = 0x00000000; 364 dump_avail[1] = 0x00000000 + memsize; 365 dump_avail[2] = 0; 366 dump_avail[3] = 0; 367 368 pmap_bootstrap(pmap_curmaxkvaddr, 369 0xd0000000, &kernel_l1pt); 370 msgbufp = (void*)msgbufpv.pv_va; 371 msgbufinit(msgbufp, msgbufsize); 372 mutex_init(); 373 374 i = 0; 375#ifdef ARM_USE_SMALL_ALLOC 376 phys_avail[i++] = 0x00001000; 377 phys_avail[i++] = 0x00002000; /* 378 *XXX: Gross hack to get our 379 * pages in the vm_page_array 380 . */ 381#endif 382 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START); 383 phys_avail[i++] = trunc_page(0x00000000 + memsize - 1); 384 phys_avail[i++] = 0; 385 phys_avail[i] = 0; 386 387 init_param2(physmem); 388 kdb_init(); 389 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 390 sizeof(struct pcb))); 391} 392