crb_machdep.c revision 247046
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 247046 2013-02-20 16:48:52Z alc $"); 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 110extern u_int data_abort_handler_address; 111extern u_int prefetch_abort_handler_address; 112extern u_int undefined_handler_address; 113 114struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 115 116/* Physical and virtual addresses for some global pages */ 117 118vm_paddr_t phys_avail[10]; 119vm_paddr_t dump_avail[4]; 120 121struct pv_addr systempage; 122struct pv_addr msgbufpv; 123struct pv_addr irqstack; 124struct pv_addr undstack; 125struct pv_addr abtstack; 126struct pv_addr kernelstack; 127 128/* Static device mappings. */ 129static const struct pmap_devmap iq81342_devmap[] = { 130 { 131 IOP34X_VADDR, 132 IOP34X_HWADDR, 133 IOP34X_SIZE, 134 VM_PROT_READ|VM_PROT_WRITE, 135 PTE_NOCACHE, 136 }, 137 { 138 /* 139 * Cheat and map a whole section, this will bring 140 * both PCI-X and PCI-E outbound I/O 141 */ 142 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1), 143 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1), 144 0x100000, 145 VM_PROT_READ|VM_PROT_WRITE, 146 PTE_NOCACHE, 147 }, 148 { 149 IOP34X_PCE1_VADDR, 150 IOP34X_PCE1, 151 IOP34X_PCE1_SIZE, 152 VM_PROT_READ|VM_PROT_WRITE, 153 PTE_NOCACHE, 154 }, 155 { 156 0, 157 0, 158 0, 159 0, 160 0, 161 } 162}; 163 164#define SDRAM_START 0x00000000 165 166extern vm_offset_t xscale_cache_clean_addr; 167 168void * 169initarm(struct arm_boot_params *abp) 170{ 171 struct pv_addr kernel_l1pt; 172 struct pv_addr dpcpu; 173 int loop, i; 174 u_int l1pagetable; 175 vm_offset_t freemempos; 176 vm_offset_t freemem_pt; 177 vm_offset_t afterkern; 178 vm_offset_t freemem_after; 179 vm_offset_t lastaddr; 180 uint32_t memsize, memstart; 181 182 lastaddr = parse_boot_param(abp); 183 set_cpufuncs(); 184 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 185 PCPU_SET(curthread, &thread0); 186 187 /* Do basic tuning, hz etc */ 188 init_param1(); 189 190 freemempos = 0x00200000; 191 /* Define a macro to simplify memory allocation */ 192#define valloc_pages(var, np) \ 193 alloc_pages((var).pv_pa, (np)); \ 194 (var).pv_va = (var).pv_pa + 0xc0000000; 195 196#define alloc_pages(var, np) \ 197 freemempos -= (np * PAGE_SIZE); \ 198 (var) = freemempos; \ 199 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 200 201 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 202 freemempos -= PAGE_SIZE; 203 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 204 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 205 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 206 valloc_pages(kernel_pt_table[loop], 207 L2_TABLE_SIZE / PAGE_SIZE); 208 } else { 209 kernel_pt_table[loop].pv_pa = freemempos + 210 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 211 L2_TABLE_SIZE_REAL; 212 kernel_pt_table[loop].pv_va = 213 kernel_pt_table[loop].pv_pa + 0xc0000000; 214 } 215 } 216 freemem_pt = freemempos; 217 freemempos = 0x00100000; 218 /* 219 * Allocate a page for the system page mapped to V0x00000000 220 * This page will just contain the system vectors and can be 221 * shared by all processes. 222 */ 223 valloc_pages(systempage, 1); 224 225 /* Allocate dynamic per-cpu area. */ 226 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 227 dpcpu_init((void *)dpcpu.pv_va, 0); 228 229 /* Allocate stacks for all modes */ 230 valloc_pages(irqstack, IRQ_STACK_SIZE); 231 valloc_pages(abtstack, ABT_STACK_SIZE); 232 valloc_pages(undstack, UND_STACK_SIZE); 233 valloc_pages(kernelstack, KSTACK_PAGES); 234 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 235#ifdef ARM_USE_SMALL_ALLOC 236 freemempos -= PAGE_SIZE; 237 freemem_pt = trunc_page(freemem_pt); 238 freemem_after = freemempos - ((freemem_pt - 0x00100000) / 239 PAGE_SIZE) * sizeof(struct arm_small_page); 240 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000) 241 , (void *)0xc0100000, freemem_pt - 0x00100000, 1); 242 freemem_after -= ((freemem_after - 0x00001000) / PAGE_SIZE) * 243 sizeof(struct arm_small_page); 244#if 0 245 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000) 246 , (void *)0xc0001000, trunc_page(freemem_after) - 0x00001000, 0); 247#endif 248 freemempos = trunc_page(freemem_after); 249 freemempos -= PAGE_SIZE; 250#endif 251 /* 252 * Now we start construction of the L1 page table 253 * We start by mapping the L2 page tables into the L1. 254 * This means that we can replace L1 mappings later on if necessary 255 */ 256 l1pagetable = kernel_l1pt.pv_va; 257 258 /* Map the L2 pages tables in the L1 page table */ 259 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1), 260 &kernel_pt_table[KERNEL_PT_SYS]); 261 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000, 262 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 263 264 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000, 265 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 266 267 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000, 268 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1), 269 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 270 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1); 271 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 272 - 1)); 273 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 274 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 275 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 276 } 277 278 279#ifdef ARM_USE_SMALL_ALLOC 280 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) { 281 arm_add_smallalloc_pages((void *)(freemem_after), 282 (void*)(freemem_after + PAGE_SIZE), 283 afterkern - (freemem_after + PAGE_SIZE), 0); 284 285 } 286#endif 287 288 /* Map the vector page. */ 289 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 290 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 291 pmap_devmap_bootstrap(l1pagetable, iq81342_devmap); 292 /* 293 * Give the XScale global cache clean code an appropriately 294 * sized chunk of unmapped VA space starting at 0xff000000 295 * (our device mappings end before this address). 296 */ 297 xscale_cache_clean_addr = 0xff000000U; 298 299 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 300 setttb(kernel_l1pt.pv_pa); 301 cpu_tlb_flushID(); 302 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 303 /* 304 * Pages were allocated during the secondary bootstrap for the 305 * stacks for different CPU modes. 306 * We must now set the r13 registers in the different CPU modes to 307 * point to these stacks. 308 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 309 * of the stack memory. 310 */ 311 312 set_stackptrs(0); 313 314 /* 315 * We must now clean the cache again.... 316 * Cleaning may be done by reading new data to displace any 317 * dirty data in the cache. This will have happened in setttb() 318 * but since we are boot strapping the addresses used for the read 319 * may have just been remapped and thus the cache could be out 320 * of sync. A re-clean after the switch will cure this. 321 * After booting there are no gross relocations of the kernel thus 322 * this problem will not occur after initarm(). 323 */ 324 cpu_idcache_wbinv_all(); 325 i80321_calibrate_delay(); 326 i81342_sdram_bounds(&obio_bs_tag, IOP34X_VADDR, &memstart, &memsize); 327 physmem = memsize / PAGE_SIZE; 328 cninit(); 329 /* Set stack for exception handlers */ 330 331 data_abort_handler_address = (u_int)data_abort_handler; 332 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 333 undefined_handler_address = (u_int)undefinedinstruction_bounce; 334 undefined_init(); 335 336 init_proc0(kernelstack.pv_va); 337 338 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 339 340 pmap_curmaxkvaddr = afterkern + PAGE_SIZE; 341 /* 342 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before 343 * calling pmap_bootstrap. 344 */ 345 dump_avail[0] = 0x00000000; 346 dump_avail[1] = 0x00000000 + memsize; 347 dump_avail[2] = 0; 348 dump_avail[3] = 0; 349 350 vm_max_kernel_address = 0xd0000000; 351 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt); 352 msgbufp = (void*)msgbufpv.pv_va; 353 msgbufinit(msgbufp, msgbufsize); 354 mutex_init(); 355 356 i = 0; 357#ifdef ARM_USE_SMALL_ALLOC 358 phys_avail[i++] = 0x00001000; 359 phys_avail[i++] = 0x00002000; /* 360 *XXX: Gross hack to get our 361 * pages in the vm_page_array 362 . */ 363#endif 364 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START); 365 phys_avail[i++] = trunc_page(0x00000000 + memsize - 1); 366 phys_avail[i++] = 0; 367 phys_avail[i] = 0; 368 369 init_param2(physmem); 370 kdb_init(); 371 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 372 sizeof(struct pcb))); 373} 374