crb_machdep.c revision 299069
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 dependent 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 299069 2016-05-04 15:48:59Z pfg $"); 50 51#include "opt_kstack_pages.h" 52 53#define _ARM32_BUS_DMA_PRIVATE 54#include <sys/param.h> 55#include <sys/systm.h> 56#include <sys/sysproto.h> 57#include <sys/signalvar.h> 58#include <sys/imgact.h> 59#include <sys/kernel.h> 60#include <sys/ktr.h> 61#include <sys/linker.h> 62#include <sys/lock.h> 63#include <sys/malloc.h> 64#include <sys/mutex.h> 65#include <sys/pcpu.h> 66#include <sys/proc.h> 67#include <sys/ptrace.h> 68#include <sys/cons.h> 69#include <sys/bio.h> 70#include <sys/bus.h> 71#include <sys/buf.h> 72#include <sys/exec.h> 73#include <sys/kdb.h> 74#include <sys/msgbuf.h> 75#include <sys/devmap.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_map.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 <machine/physmem.h> 92#include <sys/reboot.h> 93 94 95#include <arm/xscale/i8134x/i80321var.h> /* For i80321_calibrate_delay() */ 96 97#include <arm/xscale/i8134x/i81342reg.h> 98#include <arm/xscale/i8134x/i81342var.h> 99#include <arm/xscale/i8134x/obiovar.h> 100 101 102#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 103#define KERNEL_PT_IOPXS 1 104#define KERNEL_PT_BEFOREKERN 2 105#define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */ 106#define KERNEL_PT_AFKERNEL_NUM 9 107 108/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */ 109#define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM) 110 111struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 112 113/* Physical and virtual addresses for some global pages */ 114 115struct pv_addr systempage; 116struct pv_addr msgbufpv; 117struct pv_addr irqstack; 118struct pv_addr undstack; 119struct pv_addr abtstack; 120struct pv_addr kernelstack; 121 122/* Static device mappings. */ 123static const struct devmap_entry iq81342_devmap[] = { 124 { 125 IOP34X_VADDR, 126 IOP34X_HWADDR, 127 IOP34X_SIZE, 128 }, 129 { 130 /* 131 * Cheat and map a whole section, this will bring 132 * both PCI-X and PCI-E outbound I/O 133 */ 134 rounddown2(IOP34X_PCIX_OIOBAR_VADDR, 0x100000), 135 rounddown2(IOP34X_PCIX_OIOBAR, 0x100000), 136 0x100000, 137 }, 138 { 139 IOP34X_PCE1_VADDR, 140 IOP34X_PCE1, 141 IOP34X_PCE1_SIZE, 142 }, 143 { 144 0, 145 0, 146 0, 147 } 148}; 149 150#define SDRAM_START 0x00000000 151 152extern vm_offset_t xscale_cache_clean_addr; 153 154void * 155initarm(struct arm_boot_params *abp) 156{ 157 struct pv_addr kernel_l1pt; 158 struct pv_addr dpcpu; 159 int loop, i; 160 u_int l1pagetable; 161 vm_offset_t freemempos; 162 vm_offset_t freemem_pt; 163 vm_offset_t afterkern; 164 vm_offset_t freemem_after; 165 vm_offset_t lastaddr; 166 uint32_t memsize, memstart; 167 168 lastaddr = parse_boot_param(abp); 169 arm_physmem_kernaddr = abp->abp_physaddr; 170 set_cpufuncs(); 171 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 172 PCPU_SET(curthread, &thread0); 173 174 /* Do basic tuning, hz etc */ 175 init_param1(); 176 177 freemempos = 0x00200000; 178 /* Define a macro to simplify memory allocation */ 179#define valloc_pages(var, np) \ 180 alloc_pages((var).pv_pa, (np)); \ 181 (var).pv_va = (var).pv_pa + 0xc0000000; 182 183#define alloc_pages(var, np) \ 184 freemempos -= (np * PAGE_SIZE); \ 185 (var) = freemempos; \ 186 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 187 188 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 189 freemempos -= PAGE_SIZE; 190 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 191 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 192 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 193 valloc_pages(kernel_pt_table[loop], 194 L2_TABLE_SIZE / PAGE_SIZE); 195 } else { 196 kernel_pt_table[loop].pv_pa = freemempos + 197 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 198 L2_TABLE_SIZE_REAL; 199 kernel_pt_table[loop].pv_va = 200 kernel_pt_table[loop].pv_pa + 0xc0000000; 201 } 202 } 203 freemem_pt = freemempos; 204 freemempos = 0x00100000; 205 /* 206 * Allocate a page for the system page mapped to V0x00000000 207 * This page will just contain the system vectors and can be 208 * shared by all processes. 209 */ 210 valloc_pages(systempage, 1); 211 212 /* Allocate dynamic per-cpu area. */ 213 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 214 dpcpu_init((void *)dpcpu.pv_va, 0); 215 216 /* Allocate stacks for all modes */ 217 valloc_pages(irqstack, IRQ_STACK_SIZE); 218 valloc_pages(abtstack, ABT_STACK_SIZE); 219 valloc_pages(undstack, UND_STACK_SIZE); 220 valloc_pages(kernelstack, kstack_pages); 221 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 222 /* 223 * Now we start construction of the L1 page table 224 * We start by mapping the L2 page tables into the L1. 225 * This means that we can replace L1 mappings later on if necessary 226 */ 227 l1pagetable = kernel_l1pt.pv_va; 228 229 /* Map the L2 pages tables in the L1 page table */ 230 pmap_link_l2pt(l1pagetable, rounddown2(ARM_VECTORS_HIGH, 0x00100000), 231 &kernel_pt_table[KERNEL_PT_SYS]); 232 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000, 233 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 234 235 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000, 236 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 237 238 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000, 239 rounddown2(((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE, L1_S_SIZE), 240 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 241 freemem_after = rounddown2((int)lastaddr + PAGE_SIZE, PAGE_SIZE); 242 afterkern = round_page(rounddown2((vm_offset_t)lastaddr + L1_S_SIZE, L1_S_SIZE)); 243 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 244 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 245 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 246 } 247 248 249 /* Map the vector page. */ 250 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 251 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 252 devmap_bootstrap(l1pagetable, iq81342_devmap); 253 /* 254 * Give the XScale global cache clean code an appropriately 255 * sized chunk of unmapped VA space starting at 0xff000000 256 * (our device mappings end before this address). 257 */ 258 xscale_cache_clean_addr = 0xff000000U; 259 260 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 261 cpu_setttb(kernel_l1pt.pv_pa); 262 cpu_tlb_flushID(); 263 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 264 /* 265 * Pages were allocated during the secondary bootstrap for the 266 * stacks for different CPU modes. 267 * We must now set the r13 registers in the different CPU modes to 268 * point to these stacks. 269 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 270 * of the stack memory. 271 */ 272 273 set_stackptrs(0); 274 275 /* 276 * We must now clean the cache again.... 277 * Cleaning may be done by reading new data to displace any 278 * dirty data in the cache. This will have happened in cpu_setttb() 279 * but since we are boot strapping the addresses used for the read 280 * may have just been remapped and thus the cache could be out 281 * of sync. A re-clean after the switch will cure this. 282 * After booting there are no gross relocations of the kernel thus 283 * this problem will not occur after initarm(). 284 */ 285 cpu_idcache_wbinv_all(); 286 cpu_setup(); 287 288 i80321_calibrate_delay(); 289 i81342_sdram_bounds(obio_bs_tag, IOP34X_VADDR, &memstart, &memsize); 290 physmem = memsize / PAGE_SIZE; 291 cninit(); 292 /* Set stack for exception handlers */ 293 294 undefined_init(); 295 296 init_proc0(kernelstack.pv_va); 297 298 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 299 300 pmap_curmaxkvaddr = afterkern + PAGE_SIZE; 301 302 vm_max_kernel_address = 0xe0000000; 303 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt); 304 msgbufp = (void*)msgbufpv.pv_va; 305 msgbufinit(msgbufp, msgbufsize); 306 mutex_init(); 307 308 /* 309 * Add the physical ram we have available. 310 * 311 * Exclude the kernel (and all the things we allocated which immediately 312 * follow the kernel) from the VM allocation pool but not from crash 313 * dumps. virtual_avail is a global variable which tracks the kva we've 314 * "allocated" while setting up pmaps. 315 * 316 * Prepare the list of physical memory available to the vm subsystem. 317 */ 318 arm_physmem_hardware_region(SDRAM_START, memsize); 319 arm_physmem_exclude_region(freemem_pt, abp->abp_physaddr - 320 freemem_pt, EXFLAG_NOALLOC); 321 arm_physmem_exclude_region(freemempos, abp->abp_physaddr - 0x100000 - 322 freemempos, EXFLAG_NOALLOC); 323 arm_physmem_exclude_region(abp->abp_physaddr, 324 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC); 325 arm_physmem_init_kernel_globals(); 326 327 init_param2(physmem); 328 kdb_init(); 329 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 330 sizeof(struct pcb))); 331} 332