board_hl200.c revision 155324
1/*- 2 * Copyright (c) 1994-1998 Mark Brinicombe. 3 * Copyright (c) 1994 Brini. 4 * All rights reserved. 5 * 6 * This code is derived from software written for Brini by Mark Brinicombe 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Brini. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * RiscBSD kernel project 36 * 37 * machdep.c 38 * 39 * Machine dependant functions for kernel setup 40 * 41 * This file needs a lot of work. 42 * 43 * Created : 17/09/94 44 */ 45 46#include "opt_msgbuf.h" 47#include "opt_ddb.h" 48 49#include <sys/cdefs.h> 50__FBSDID("$FreeBSD: head/sys/arm/at91/kb920x_machdep.c 155324 2006-02-04 23:32:13Z imp $"); 51 52#define _ARM32_BUS_DMA_PRIVATE 53#include <sys/param.h> 54#include <sys/systm.h> 55#include <sys/sysproto.h> 56#include <sys/signalvar.h> 57#include <sys/imgact.h> 58#include <sys/kernel.h> 59#include <sys/ktr.h> 60#include <sys/linker.h> 61#include <sys/lock.h> 62#include <sys/malloc.h> 63#include <sys/mutex.h> 64#include <sys/pcpu.h> 65#include <sys/proc.h> 66#include <sys/ptrace.h> 67#include <sys/cons.h> 68#include <sys/bio.h> 69#include <sys/bus.h> 70#include <sys/buf.h> 71#include <sys/exec.h> 72#include <sys/kdb.h> 73#include <sys/msgbuf.h> 74#include <machine/reg.h> 75#include <machine/cpu.h> 76 77#include <vm/vm.h> 78#include <vm/pmap.h> 79#include <vm/vm.h> 80#include <vm/vm_object.h> 81#include <vm/vm_page.h> 82#include <vm/vm_pager.h> 83#include <vm/vm_map.h> 84#include <vm/vnode_pager.h> 85#include <machine/pmap.h> 86#include <machine/vmparam.h> 87#include <machine/pcb.h> 88#include <machine/undefined.h> 89#include <machine/machdep.h> 90#include <machine/metadata.h> 91#include <machine/armreg.h> 92#include <machine/bus.h> 93#include <sys/reboot.h> 94 95#include <arm/at91/at91rm92reg.h> 96 97#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 98#define KERNEL_PT_KERN 1 99#define KERNEL_PT_KERN_NUM 8 100#define KERNEL_PT_AFKERNEL KERNEL_PT_KERN + KERNEL_PT_KERN_NUM /* L2 table for mapping after kernel */ 101#define KERNEL_PT_AFKERNEL_NUM 5 102 103/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */ 104#define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM) 105 106/* Define various stack sizes in pages */ 107#define IRQ_STACK_SIZE 1 108#define ABT_STACK_SIZE 1 109#define UND_STACK_SIZE 1 110 111extern u_int data_abort_handler_address; 112extern u_int prefetch_abort_handler_address; 113extern u_int undefined_handler_address; 114 115struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 116 117extern void *_end; 118 119extern vm_offset_t sa1_cache_clean_addr; 120 121extern int *end; 122 123struct pcpu __pcpu; 124struct pcpu *pcpup = &__pcpu; 125 126/* Physical and virtual addresses for some global pages */ 127 128vm_paddr_t phys_avail[10]; 129vm_paddr_t dump_avail[4]; 130vm_offset_t physical_pages; 131vm_offset_t clean_sva, clean_eva; 132 133struct pv_addr systempage; 134struct pv_addr msgbufpv; 135struct pv_addr irqstack; 136struct pv_addr undstack; 137struct pv_addr abtstack; 138struct pv_addr kernelstack; 139struct pv_addr minidataclean; 140 141static struct trapframe proc0_tf; 142 143/* Static device mappings. */ 144static const struct pmap_devmap kb920x_devmap[] = { 145 /* 146 * Map the on-board devices VA == PA so that we can access them 147 * with the MMU on or off. 148 */ 149 { 150 /* 151 * This at least maps the interrupt controller, the UART 152 * and the timer. Other devices should use newbus to 153 * map their memory anyway. 154 */ 155 0xfff00000, 156 0xfff00000, 157 0x100000, 158 VM_PROT_READ|VM_PROT_WRITE, 159 PTE_NOCACHE, 160 }, 161 { 162 0, 163 0, 164 0, 165 0, 166 0, 167 } 168}; 169 170#define SDRAM_START 0xa0000000 171 172#ifdef DDB 173extern vm_offset_t ksym_start, ksym_end; 174#endif 175 176void * 177initarm(void *arg, void *arg2) 178{ 179 struct pv_addr kernel_l1pt; 180 int loop; 181 u_int l1pagetable; 182 vm_offset_t freemempos; 183 vm_offset_t afterkern; 184 int i = 0; 185 uint32_t fake_preload[35]; 186 uint32_t memsize = 32 * 1024 * 1024; 187 188 i = 0; 189 190 set_cpufuncs(); 191 cninit(); 192 193 fake_preload[i++] = MODINFO_NAME; 194 fake_preload[i++] = strlen("elf kernel") + 1; 195 strcpy((char*)&fake_preload[i++], "elf kernel"); 196 i += 2; 197 fake_preload[i++] = MODINFO_TYPE; 198 fake_preload[i++] = strlen("elf kernel") + 1; 199 strcpy((char*)&fake_preload[i++], "elf kernel"); 200 i += 2; 201 fake_preload[i++] = MODINFO_ADDR; 202 fake_preload[i++] = sizeof(vm_offset_t); 203 fake_preload[i++] = KERNBASE; 204 fake_preload[i++] = MODINFO_SIZE; 205 fake_preload[i++] = sizeof(uint32_t); 206 fake_preload[i++] = (uint32_t)&end - KERNBASE; 207 fake_preload[i++] = 0; 208 fake_preload[i] = 0; 209 preload_metadata = (void *)fake_preload; 210 211 212 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 213 PCPU_SET(curthread, &thread0); 214 215#define KERNEL_TEXT_BASE (KERNBASE) 216 freemempos = ((vm_offset_t)&end + PAGE_MASK) & ~PAGE_MASK; 217 /* Define a macro to simplify memory allocation */ 218#define valloc_pages(var, np) \ 219 alloc_pages((var).pv_va, (np)); \ 220 (var).pv_pa = (var).pv_va + (KERNPHYSADDR - KERNVIRTADDR); 221 222#define alloc_pages(var, np) \ 223 (var) = freemempos; \ 224 freemempos += (np * PAGE_SIZE); \ 225 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 226 227 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 228 freemempos += PAGE_SIZE; 229 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 230 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 231 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 232 valloc_pages(kernel_pt_table[loop], 233 L2_TABLE_SIZE / PAGE_SIZE); 234 } else { 235 kernel_pt_table[loop].pv_va = freemempos - 236 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 237 L2_TABLE_SIZE_REAL; 238 kernel_pt_table[loop].pv_pa = 239 kernel_pt_table[loop].pv_va - KERNVIRTADDR + 240 KERNPHYSADDR; 241 } 242 i++; 243 } 244 /* 245 * Allocate a page for the system page mapped to V0x00000000 246 * This page will just contain the system vectors and can be 247 * shared by all processes. 248 */ 249 valloc_pages(systempage, 1); 250 251 /* Allocate stacks for all modes */ 252 valloc_pages(irqstack, IRQ_STACK_SIZE); 253 valloc_pages(abtstack, ABT_STACK_SIZE); 254 valloc_pages(undstack, UND_STACK_SIZE); 255 valloc_pages(kernelstack, KSTACK_PAGES); 256 alloc_pages(minidataclean.pv_pa, 1); 257 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE); 258 /* 259 * Now we start construction of the L1 page table 260 * We start by mapping the L2 page tables into the L1. 261 * This means that we can replace L1 mappings later on if necessary 262 */ 263 l1pagetable = kernel_l1pt.pv_va; 264 265 /* Map the L2 pages tables in the L1 page table */ 266 pmap_link_l2pt(l1pagetable, ARM_VECTORS_LOW, 267 &kernel_pt_table[KERNEL_PT_SYS]); 268 for (i = 0; i < KERNEL_PT_KERN_NUM; i++) 269 pmap_link_l2pt(l1pagetable, KERNBASE + i * 0x100000, 270 &kernel_pt_table[KERNEL_PT_KERN + i]); 271 pmap_map_chunk(l1pagetable, KERNBASE, KERNPHYSADDR, 272 (((uint32_t)(&end) - KERNBASE) + PAGE_SIZE) & ~(PAGE_SIZE - 1), 273 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 274 afterkern = round_page(((vm_offset_t)&end + L1_S_SIZE) & ~(L1_S_SIZE 275 - 1)); 276 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 277 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 278 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 279 } 280 pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa, 281 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 282 283 284 /* Map the vector page. */ 285 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 286 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 287 /* Map the stack pages */ 288 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 289 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 290 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 291 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 292 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 293 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 294 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 295 KSTACK_PAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 296 297 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 298 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 299 pmap_map_chunk(l1pagetable, msgbufpv.pv_va, msgbufpv.pv_pa, 300 MSGBUF_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 301 302 303 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 304 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 305 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 306 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 307 } 308 309 pmap_devmap_bootstrap(l1pagetable, kb920x_devmap); 310 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 311 setttb(kernel_l1pt.pv_pa); 312 cpu_tlb_flushID(); 313 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 314 315 /* 316 * Pages were allocated during the secondary bootstrap for the 317 * stacks for different CPU modes. 318 * We must now set the r13 registers in the different CPU modes to 319 * point to these stacks. 320 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 321 * of the stack memory. 322 */ 323 324 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE); 325 set_stackptr(PSR_IRQ32_MODE, 326 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 327 set_stackptr(PSR_ABT32_MODE, 328 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 329 set_stackptr(PSR_UND32_MODE, 330 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 331 332 333 334 /* 335 * We must now clean the cache again.... 336 * Cleaning may be done by reading new data to displace any 337 * dirty data in the cache. This will have happened in setttb() 338 * but since we are boot strapping the addresses used for the read 339 * may have just been remapped and thus the cache could be out 340 * of sync. A re-clean after the switch will cure this. 341 * After booting there are no gross reloations of the kernel thus 342 * this problem will not occur after initarm(). 343 */ 344 cpu_idcache_wbinv_all(); 345 346 /* Set stack for exception handlers */ 347 348 data_abort_handler_address = (u_int)data_abort_handler; 349 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 350 undefined_handler_address = (u_int)undefinedinstruction_bounce; 351 undefined_init(); 352 353 proc_linkup(&proc0, &ksegrp0, &thread0); 354 thread0.td_kstack = kernelstack.pv_va; 355 thread0.td_pcb = (struct pcb *) 356 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1; 357 thread0.td_pcb->pcb_flags = 0; 358 thread0.td_frame = &proc0_tf; 359 pcpup->pc_curpcb = thread0.td_pcb; 360 361 arm_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 362 363 pmap_curmaxkvaddr = afterkern + 0x100000 * (KERNEL_PT_KERN_NUM - 1); 364 pmap_bootstrap(freemempos, 365 KERNVIRTADDR + 3 * memsize, 366 &kernel_l1pt); 367 msgbufp = (void*)msgbufpv.pv_va; 368 msgbufinit(msgbufp, MSGBUF_SIZE); 369 mutex_init(); 370 371 i = 0; 372 dump_avail[0] = KERNPHYSADDR; 373 dump_avail[1] = KERNPHYSADDR + memsize; 374 dump_avail[2] = 0; 375 dump_avail[3] = 0; 376 377 phys_avail[0] = freemempos - KERNVIRTADDR + KERNPHYSADDR; 378 phys_avail[1] = KERNPHYSADDR + memsize; 379 phys_avail[2] = 0; 380 phys_avail[3] = 0; 381 /* Do basic tuning, hz etc */ 382 init_param1(); 383 init_param2(memsize / PAGE_SIZE); 384 avail_end = KERNPHYSADDR + memsize - 1; 385 kdb_init(); 386 boothowto = RB_SINGLE; 387 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 388 sizeof(struct pcb))); 389} 390