1 /* $NetBSD: integrator_machdep.c,v 1.76 2018/09/21 12:04:09 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001,2002 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997,1998 Mark Brinicombe. 34 * Copyright (c) 1997,1998 Causality Limited. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Mark Brinicombe 48 * for the NetBSD Project. 49 * 4. The name of the company nor the name of the author may be used to 50 * endorse or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * Machine dependent functions for kernel setup for integrator board 66 * 67 * Created : 24/11/97 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: integrator_machdep.c,v 1.76 2018/09/21 12:04:09 skrll Exp $"); 72 73 #include "opt_arm_debug.h" 74 #include "opt_console.h" 75 #include "opt_ddb.h" 76 #include "opt_pmap_debug.h" 77 78 #include <sys/param.h> 79 #include <sys/device.h> 80 #include <sys/systm.h> 81 #include <sys/kernel.h> 82 #include <sys/exec.h> 83 #include <sys/proc.h> 84 #include <sys/msgbuf.h> 85 #include <sys/reboot.h> 86 #include <sys/termios.h> 87 #include <sys/ksyms.h> 88 #include <sys/bus.h> 89 #include <sys/cpu.h> 90 #include <sys/intr.h> 91 92 #include <uvm/uvm_extern.h> 93 94 #include <dev/cons.h> 95 96 #include <machine/db_machdep.h> 97 #include <ddb/db_sym.h> 98 #include <ddb/db_extern.h> 99 100 #include <machine/bootconfig.h> 101 #include <arm/locore.h> 102 #include <arm/undefined.h> 103 104 #include <arm/arm32/machdep.h> 105 106 #include <evbarm/integrator/integrator_boot.h> 107 108 #include "pci.h" 109 #include "ksyms.h" 110 111 void ifpga_reset(void) __attribute__((noreturn)); 112 113 /* 114 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 115 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 116 */ 117 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 118 #define KERNEL_VM_SIZE 0x0C000000 119 120 BootConfig bootconfig; /* Boot config storage */ 121 char *boot_args = NULL; 122 char *boot_file = NULL; 123 124 /* Prototypes */ 125 126 static void integrator_sdram_bounds (paddr_t *, psize_t *); 127 128 void consinit(void); 129 130 /* A load of console goo. */ 131 #include "vga.h" 132 #if NVGA > 0 133 #include <dev/ic/mc6845reg.h> 134 #include <dev/ic/pcdisplayvar.h> 135 #include <dev/ic/vgareg.h> 136 #include <dev/ic/vgavar.h> 137 #endif 138 139 #include "pckbc.h" 140 #if NPCKBC > 0 141 #include <dev/ic/i8042reg.h> 142 #include <dev/ic/pckbcvar.h> 143 #endif 144 145 #include "com.h" 146 #if NCOM > 0 147 #include <dev/ic/comreg.h> 148 #include <dev/ic/comvar.h> 149 #ifndef CONCOMADDR 150 #define CONCOMADDR 0x3f8 151 #endif 152 #endif 153 154 /* 155 * Define the default console speed for the board. This is generally 156 * what the firmware provided with the board defaults to. 157 */ 158 #ifndef CONSPEED 159 #define CONSPEED B115200 160 #endif 161 #ifndef CONMODE 162 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 163 #endif 164 165 int comcnspeed = CONSPEED; 166 int comcnmode = CONMODE; 167 168 #include "plcom.h" 169 #if (NPLCOM > 0) 170 #include <evbarm/dev/plcomreg.h> 171 #include <evbarm/dev/plcomvar.h> 172 173 #include <evbarm/ifpga/ifpgamem.h> 174 #include <evbarm/ifpga/ifpgareg.h> 175 #include <evbarm/ifpga/ifpgavar.h> 176 #endif 177 178 #ifndef CONSDEVNAME 179 #define CONSDEVNAME "plcom" 180 #endif 181 182 #ifndef PLCONSPEED 183 #define PLCONSPEED B38400 184 #endif 185 #ifndef PLCONMODE 186 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 187 #endif 188 #ifndef PLCOMCNUNIT 189 #define PLCOMCNUNIT -1 190 #endif 191 192 int plcomcnspeed = PLCONSPEED; 193 int plcomcnmode = PLCONMODE; 194 195 #if 0 196 extern struct consdev kcomcons; 197 static void kcomcnputc(dev_t, int); 198 #endif 199 200 /* 201 * void cpu_reboot(int howto, char *bootstr) 202 * 203 * Reboots the system 204 * 205 * Deal with any syncing, unmounting, dumping and shutdown hooks, 206 * then reset the CPU. 207 */ 208 void 209 cpu_reboot(int howto, char *bootstr) 210 { 211 212 /* 213 * If we are still cold then hit the air brakes 214 * and crash to earth fast 215 */ 216 if (cold) { 217 doshutdownhooks(); 218 pmf_system_shutdown(boothowto); 219 printf("The operating system has halted.\n"); 220 printf("Please press any key to reboot.\n\n"); 221 cngetc(); 222 printf("rebooting...\n"); 223 ifpga_reset(); 224 /*NOTREACHED*/ 225 } 226 227 /* Disable console buffering */ 228 229 /* 230 * If RB_NOSYNC was not specified sync the discs. 231 * Note: Unless cold is set to 1 here, syslogd will die during the 232 * unmount. It looks like syslogd is getting woken up only to find 233 * that it cannot page part of the binary in as the filesystem has 234 * been unmounted. 235 */ 236 if (!(howto & RB_NOSYNC)) 237 bootsync(); 238 239 /* Say NO to interrupts */ 240 splhigh(); 241 242 /* Do a dump if requested. */ 243 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 244 dumpsys(); 245 246 /* Run any shutdown hooks */ 247 doshutdownhooks(); 248 249 pmf_system_shutdown(boothowto); 250 251 /* Make sure IRQ's are disabled */ 252 IRQdisable; 253 254 if (howto & RB_HALT) { 255 printf("The operating system has halted.\n"); 256 printf("Please press any key to reboot.\n\n"); 257 cngetc(); 258 } 259 260 printf("rebooting...\n"); 261 ifpga_reset(); 262 /*NOTREACHED*/ 263 } 264 265 /* Statically mapped devices. */ 266 static const struct pmap_devmap integrator_devmap[] = { 267 #if NPLCOM > 0 && defined(PLCONSOLE) 268 { 269 UART0_BOOT_BASE, 270 IFPGA_IO_BASE + IFPGA_UART0, 271 1024 * 1024, 272 VM_PROT_READ|VM_PROT_WRITE, 273 PTE_NOCACHE 274 }, 275 276 { 277 UART1_BOOT_BASE, 278 IFPGA_IO_BASE + IFPGA_UART1, 279 1024 * 1024, 280 VM_PROT_READ|VM_PROT_WRITE, 281 PTE_NOCACHE 282 }, 283 #endif 284 #if NPCI > 0 285 { 286 IFPGA_PCI_IO_VBASE, 287 IFPGA_PCI_IO_BASE, 288 IFPGA_PCI_IO_VSIZE, 289 VM_PROT_READ|VM_PROT_WRITE, 290 PTE_NOCACHE 291 }, 292 293 { 294 IFPGA_PCI_CONF_VBASE, 295 IFPGA_PCI_CONF_BASE, 296 IFPGA_PCI_CONF_VSIZE, 297 VM_PROT_READ|VM_PROT_WRITE, 298 PTE_NOCACHE 299 }, 300 #endif 301 302 { 303 0, 304 0, 305 0, 306 0, 307 0 308 } 309 }; 310 311 /* 312 * u_int initarm(...) 313 * 314 * Initial entry point on startup. This gets called before main() is 315 * entered. 316 * It should be responsible for setting up everything that must be 317 * in place when main is called. 318 * This includes 319 * Taking a copy of the boot configuration structure. 320 * Initialising the physical console so characters can be printed. 321 * Setting up page tables for the kernel 322 * Relocating the kernel to the bottom of physical memory 323 */ 324 325 u_int 326 initarm(void *arg) 327 { 328 extern int KERNEL_BASE_phys[]; 329 paddr_t memstart; 330 psize_t memsize; 331 332 /* 333 * Heads up ... Setup the CPU / MMU / TLB functions 334 */ 335 if (set_cpufuncs()) 336 panic("cpu not recognized!"); 337 338 /* map some peripheral registers */ 339 340 pmap_devmap_bootstrap((vaddr_t)armreg_ttbr_read() & -L1_TABLE_SIZE, 341 integrator_devmap); 342 343 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 344 345 consinit(); 346 347 /* Talk to the user */ 348 #define BDSTR(s) _BDSTR(s) 349 #define _BDSTR(s) #s 350 printf("\nNetBSD/evbarm (" BDSTR(EVBARM_BOARDTYPE) ") booting ...\n"); 351 352 /* 353 * Fetch the SDRAM start/size from the CM configuration registers. 354 */ 355 integrator_sdram_bounds(&memstart, &memsize); 356 357 #if defined(INTEGRATOR_CP) 358 /* 359 * XXX QEMU reports SDRAM starting at 0x100000, but presents a flat 360 * physical memory model. Set memstart to 0x0, so arm32_bootmem_init 361 * doesn't get fooled later. 362 */ 363 memstart = 0; 364 #endif 365 366 #ifdef VERBOSE_INIT_ARM 367 printf("initarm: Configuring system ...\n"); 368 #endif 369 370 /* Fake bootconfig structure for the benefit of pmap.c */ 371 /* XXX must make the memory description h/w independent */ 372 bootconfig.dramblocks = 1; 373 bootconfig.dram[0].address = memstart; 374 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 375 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 376 377 arm32_bootmem_init(bootconfig.dram[0].address, 378 bootconfig.dram[0].pages * PAGE_SIZE, (unsigned int) KERNEL_BASE_phys); 379 380 arm32_kernel_vm_init(KERNEL_VM_BASE, ARM_VECTORS_LOW, 0, integrator_devmap, 381 false); 382 383 #ifdef VERBOSE_INIT_ARM 384 printf("done.\n"); 385 #endif 386 387 return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, NULL, 0); 388 } 389 390 void 391 consinit(void) 392 { 393 static int consinit_called = 0; 394 #if 0 395 char *console = CONSDEVNAME; 396 #endif 397 398 if (consinit_called != 0) 399 return; 400 401 consinit_called = 1; 402 403 #if NPLCOM > 0 && defined(PLCONSOLE) 404 if (PLCOMCNUNIT == 0) { 405 extern struct bus_space ifpga_common_bs_tag; 406 static struct plcom_instance ifpga_pi1 = { 407 #if defined(INTEGRATOR_CP) 408 .pi_type = PLCOM_TYPE_PL011, 409 #else 410 .pi_type = PLCOM_TYPE_PL010, 411 #endif 412 .pi_iot = &ifpga_common_bs_tag, 413 .pi_size = IFPGA_UART_SIZE, 414 .pi_iobase = IFPGA_UART0 415 }; 416 417 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK, 418 plcomcnmode, PLCOMCNUNIT)) 419 panic("can't init serial console"); 420 return; 421 } else if (PLCOMCNUNIT == 1) { 422 extern struct bus_space ifpga_common_bs_tag; 423 static struct plcom_instance ifpga_pi1 = { 424 #if defined(INTEGRATOR_CP) 425 .pi_type = PLCOM_TYPE_PL011, 426 #else 427 .pi_type = PLCOM_TYPE_PL010, 428 #endif 429 .pi_iot = &ifpga_common_bs_tag, 430 .pi_size = IFPGA_UART_SIZE, 431 .pi_iobase = IFPGA_UART1 432 }; 433 434 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK, 435 plcomcnmode, PLCOMCNUNIT)) 436 panic("can't init serial console"); 437 return; 438 } 439 #endif 440 #if (NCOM > 0) 441 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 442 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 443 panic("can't init serial console @%x", CONCOMADDR); 444 return; 445 #endif 446 panic("No serial console configured"); 447 } 448 449 static void 450 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 451 { 452 volatile unsigned long *cm_sdram 453 = (volatile unsigned long *)0x10000020; 454 volatile unsigned long *cm_stat 455 = (volatile unsigned long *)0x10000010; 456 457 *memstart = *cm_stat & 0x00ff0000; 458 459 /* 460 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 461 * to access the entire bank. 462 */ 463 switch ((*cm_sdram >> 2) & 0x7) 464 { 465 case 0: 466 *memsize = 16 * 1024 * 1024; 467 break; 468 case 1: 469 *memsize = 32 * 1024 * 1024; 470 break; 471 case 2: 472 *memsize = 64 * 1024 * 1024; 473 break; 474 case 3: 475 *memsize = 128 * 1024 * 1024; 476 break; 477 case 4: 478 /* With 256M of memory there is no wrap-around. */ 479 *memsize = 256 * 1024 * 1024 - *memstart; 480 break; 481 default: 482 printf("CM_SDRAM retuns unknown value, using 16M\n"); 483 *memsize = 16 * 1024 * 1024; 484 break; 485 } 486 } 487