crb_machdep.c revision 280823
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 280823 2015-03-29 20:37:28Z andrew $"); 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_map.h> 81#include <machine/devmap.h> 82#include <machine/vmparam.h> 83#include <machine/pcb.h> 84#include <machine/undefined.h> 85#include <machine/machdep.h> 86#include <machine/metadata.h> 87#include <machine/armreg.h> 88#include <machine/bus.h> 89#include <machine/physmem.h> 90#include <sys/reboot.h> 91 92 93#include <arm/xscale/i80321/i80321var.h> /* For i80321_calibrate_delay() */ 94 95#include <arm/xscale/i8134x/i81342reg.h> 96#include <arm/xscale/i8134x/i81342var.h> 97#include <arm/xscale/i8134x/obiovar.h> 98 99 100#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 101#define KERNEL_PT_IOPXS 1 102#define KERNEL_PT_BEFOREKERN 2 103#define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */ 104#define KERNEL_PT_AFKERNEL_NUM 9 105 106/* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */ 107#define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM) 108 109struct pv_addr kernel_pt_table[NUM_KERNEL_PTS]; 110 111/* Physical and virtual addresses for some global pages */ 112 113struct pv_addr systempage; 114struct pv_addr msgbufpv; 115struct pv_addr irqstack; 116struct pv_addr undstack; 117struct pv_addr abtstack; 118struct pv_addr kernelstack; 119 120/* Static device mappings. */ 121static const struct arm_devmap_entry iq81342_devmap[] = { 122 { 123 IOP34X_VADDR, 124 IOP34X_HWADDR, 125 IOP34X_SIZE, 126 VM_PROT_READ|VM_PROT_WRITE, 127 PTE_DEVICE, 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 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1), 135 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1), 136 0x100000, 137 VM_PROT_READ|VM_PROT_WRITE, 138 PTE_DEVICE, 139 }, 140 { 141 IOP34X_PCE1_VADDR, 142 IOP34X_PCE1, 143 IOP34X_PCE1_SIZE, 144 VM_PROT_READ|VM_PROT_WRITE, 145 PTE_DEVICE, 146 }, 147 { 148 0, 149 0, 150 0, 151 0, 152 0, 153 } 154}; 155 156#define SDRAM_START 0x00000000 157 158extern vm_offset_t xscale_cache_clean_addr; 159 160void * 161initarm(struct arm_boot_params *abp) 162{ 163 struct pv_addr kernel_l1pt; 164 struct pv_addr dpcpu; 165 int loop, i; 166 u_int l1pagetable; 167 vm_offset_t freemempos; 168 vm_offset_t freemem_pt; 169 vm_offset_t afterkern; 170 vm_offset_t freemem_after; 171 vm_offset_t lastaddr; 172 uint32_t memsize, memstart; 173 174 lastaddr = parse_boot_param(abp); 175 arm_physmem_kernaddr = abp->abp_physaddr; 176 set_cpufuncs(); 177 pcpu_init(pcpup, 0, sizeof(struct pcpu)); 178 PCPU_SET(curthread, &thread0); 179 180 /* Do basic tuning, hz etc */ 181 init_param1(); 182 183 freemempos = 0x00200000; 184 /* Define a macro to simplify memory allocation */ 185#define valloc_pages(var, np) \ 186 alloc_pages((var).pv_pa, (np)); \ 187 (var).pv_va = (var).pv_pa + 0xc0000000; 188 189#define alloc_pages(var, np) \ 190 freemempos -= (np * PAGE_SIZE); \ 191 (var) = freemempos; \ 192 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 193 194 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0) 195 freemempos -= PAGE_SIZE; 196 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 197 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 198 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) { 199 valloc_pages(kernel_pt_table[loop], 200 L2_TABLE_SIZE / PAGE_SIZE); 201 } else { 202 kernel_pt_table[loop].pv_pa = freemempos + 203 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) * 204 L2_TABLE_SIZE_REAL; 205 kernel_pt_table[loop].pv_va = 206 kernel_pt_table[loop].pv_pa + 0xc0000000; 207 } 208 } 209 freemem_pt = freemempos; 210 freemempos = 0x00100000; 211 /* 212 * Allocate a page for the system page mapped to V0x00000000 213 * This page will just contain the system vectors and can be 214 * shared by all processes. 215 */ 216 valloc_pages(systempage, 1); 217 218 /* Allocate dynamic per-cpu area. */ 219 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE); 220 dpcpu_init((void *)dpcpu.pv_va, 0); 221 222 /* Allocate stacks for all modes */ 223 valloc_pages(irqstack, IRQ_STACK_SIZE); 224 valloc_pages(abtstack, ABT_STACK_SIZE); 225 valloc_pages(undstack, UND_STACK_SIZE); 226 valloc_pages(kernelstack, KSTACK_PAGES); 227 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE); 228 /* 229 * Now we start construction of the L1 page table 230 * We start by mapping the L2 page tables into the L1. 231 * This means that we can replace L1 mappings later on if necessary 232 */ 233 l1pagetable = kernel_l1pt.pv_va; 234 235 /* Map the L2 pages tables in the L1 page table */ 236 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1), 237 &kernel_pt_table[KERNEL_PT_SYS]); 238 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000, 239 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 240 241 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000, 242 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 243 244 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000, 245 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1), 246 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 247 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1); 248 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE 249 - 1)); 250 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) { 251 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000, 252 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]); 253 } 254 255 256 /* Map the vector page. */ 257 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 258 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 259 arm_devmap_bootstrap(l1pagetable, iq81342_devmap); 260 /* 261 * Give the XScale global cache clean code an appropriately 262 * sized chunk of unmapped VA space starting at 0xff000000 263 * (our device mappings end before this address). 264 */ 265 xscale_cache_clean_addr = 0xff000000U; 266 267 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 268 setttb(kernel_l1pt.pv_pa); 269 cpu_tlb_flushID(); 270 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 271 /* 272 * Pages were allocated during the secondary bootstrap for the 273 * stacks for different CPU modes. 274 * We must now set the r13 registers in the different CPU modes to 275 * point to these stacks. 276 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 277 * of the stack memory. 278 */ 279 280 set_stackptrs(0); 281 282 /* 283 * We must now clean the cache again.... 284 * Cleaning may be done by reading new data to displace any 285 * dirty data in the cache. This will have happened in setttb() 286 * but since we are boot strapping the addresses used for the read 287 * may have just been remapped and thus the cache could be out 288 * of sync. A re-clean after the switch will cure this. 289 * After booting there are no gross relocations of the kernel thus 290 * this problem will not occur after initarm(). 291 */ 292 cpu_idcache_wbinv_all(); 293 cpu_setup(); 294 295 i80321_calibrate_delay(); 296 i81342_sdram_bounds(obio_bs_tag, IOP34X_VADDR, &memstart, &memsize); 297 physmem = memsize / PAGE_SIZE; 298 cninit(); 299 /* Set stack for exception handlers */ 300 301 undefined_init(); 302 303 init_proc0(kernelstack.pv_va); 304 305 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 306 307 pmap_curmaxkvaddr = afterkern + PAGE_SIZE; 308 309 vm_max_kernel_address = 0xe0000000; 310 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt); 311 msgbufp = (void*)msgbufpv.pv_va; 312 msgbufinit(msgbufp, msgbufsize); 313 mutex_init(); 314 315 /* 316 * Add the physical ram we have available. 317 * 318 * Exclude the kernel (and all the things we allocated which immediately 319 * follow the kernel) from the VM allocation pool but not from crash 320 * dumps. virtual_avail is a global variable which tracks the kva we've 321 * "allocated" while setting up pmaps. 322 * 323 * Prepare the list of physical memory available to the vm subsystem. 324 */ 325 arm_physmem_hardware_region(SDRAM_START, memsize); 326 arm_physmem_exclude_region(freemem_pt, KERNPHYSADDR - 327 freemem_pt, EXFLAG_NOALLOC); 328 arm_physmem_exclude_region(freemempos, KERNPHYSADDR - 0x100000 - 329 freemempos, EXFLAG_NOALLOC); 330 arm_physmem_exclude_region(abp->abp_physaddr, 331 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC); 332 arm_physmem_init_kernel_globals(); 333 334 init_param2(physmem); 335 kdb_init(); 336 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP - 337 sizeof(struct pcb))); 338} 339