1 /* 2 * Initial setup-routines for HP 9000 based hardware. 3 * 4 * Copyright (C) 1991, 1992, 1995 Linus Torvalds 5 * Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de> 6 * Modifications copyright 1999 SuSE GmbH (Philipp Rumpf) 7 * Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net> 8 * Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org> 9 * Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net> 10 * 11 * Initial PA-RISC Version: 04-23-1999 by Helge Deller 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2, or (at your option) 16 * any later version. 17 * 18 * This program is distributed in the hope that it will be useful, 19 * but WITHOUT ANY WARRANTY; without even the implied warranty of 20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 21 * GNU General Public License for more details. 22 * 23 * You should have received a copy of the GNU General Public License 24 * along with this program; if not, write to the Free Software 25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 26 * 27 */ 28 29 #include <linux/kernel.h> 30 #include <linux/initrd.h> 31 #include <linux/init.h> 32 #include <linux/console.h> 33 #include <linux/seq_file.h> 34 #define PCI_DEBUG 35 #include <linux/pci.h> 36 #undef PCI_DEBUG 37 #include <linux/proc_fs.h> 38 #include <linux/export.h> 39 #include <linux/sched.h> 40 #include <linux/sched/clock.h> 41 #include <linux/start_kernel.h> 42 43 #include <asm/cacheflush.h> 44 #include <asm/processor.h> 45 #include <asm/sections.h> 46 #include <asm/pdc.h> 47 #include <asm/led.h> 48 #include <asm/machdep.h> /* for pa7300lc_init() proto */ 49 #include <asm/pdc_chassis.h> 50 #include <asm/io.h> 51 #include <asm/setup.h> 52 #include <asm/unwind.h> 53 #include <asm/smp.h> 54 55 static char __initdata command_line[COMMAND_LINE_SIZE]; 56 57 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ 58 struct proc_dir_entry * proc_runway_root __read_mostly = NULL; 59 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; 60 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; 61 62 void __init setup_cmdline(char **cmdline_p) 63 { 64 extern unsigned int boot_args[]; 65 66 /* Collect stuff passed in from the boot loader */ 67 68 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 69 if (boot_args[0] < 64) { 70 /* called from hpux boot loader */ 71 boot_command_line[0] = '\0'; 72 } else { 73 strlcpy(boot_command_line, (char *)__va(boot_args[1]), 74 COMMAND_LINE_SIZE); 75 76 #ifdef CONFIG_BLK_DEV_INITRD 77 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ 78 { 79 initrd_start = (unsigned long)__va(boot_args[2]); 80 initrd_end = (unsigned long)__va(boot_args[3]); 81 } 82 #endif 83 } 84 85 strcpy(command_line, boot_command_line); 86 *cmdline_p = command_line; 87 } 88 89 #ifdef CONFIG_PA11 90 void __init dma_ops_init(void) 91 { 92 switch (boot_cpu_data.cpu_type) { 93 case pcx: 94 /* 95 * We've got way too many dependencies on 1.1 semantics 96 * to support 1.0 boxes at this point. 97 */ 98 panic( "PA-RISC Linux currently only supports machines that conform to\n" 99 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 100 101 case pcxl2: 102 pa7300lc_init(); 103 break; 104 default: 105 break; 106 } 107 } 108 #endif 109 110 extern void collect_boot_cpu_data(void); 111 112 void __init setup_arch(char **cmdline_p) 113 { 114 #ifdef CONFIG_64BIT 115 extern int parisc_narrow_firmware; 116 #endif 117 unwind_init(); 118 119 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 120 121 #ifdef CONFIG_64BIT 122 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 123 #else 124 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 125 #endif 126 127 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 128 (int)(PAGE_SIZE / 1024)); 129 #ifdef CONFIG_HUGETLB_PAGE 130 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 131 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 132 #else 133 printk(KERN_CONT "disabled"); 134 #endif 135 printk(KERN_CONT ".\n"); 136 137 /* 138 * Check if initial kernel page mappings are sufficient. 139 * panic early if not, else we may access kernel functions 140 * and variables which can't be reached. 141 */ 142 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 143 panic("KERNEL_INITIAL_ORDER too small!"); 144 145 pdc_console_init(); 146 147 #ifdef CONFIG_64BIT 148 if(parisc_narrow_firmware) { 149 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 150 } 151 #endif 152 setup_pdc(); 153 setup_cmdline(cmdline_p); 154 collect_boot_cpu_data(); 155 do_memory_inventory(); /* probe for physical memory */ 156 parisc_cache_init(); 157 paging_init(); 158 159 #ifdef CONFIG_CHASSIS_LCD_LED 160 /* initialize the LCD/LED after boot_cpu_data is available ! */ 161 led_init(); /* LCD/LED initialization */ 162 #endif 163 164 #ifdef CONFIG_PA11 165 dma_ops_init(); 166 #endif 167 168 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) 169 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */ 170 #endif 171 172 clear_sched_clock_stable(); 173 } 174 175 /* 176 * Display CPU info for all CPUs. 177 * for parisc this is in processor.c 178 */ 179 extern int show_cpuinfo (struct seq_file *m, void *v); 180 181 static void * 182 c_start (struct seq_file *m, loff_t *pos) 183 { 184 /* Looks like the caller will call repeatedly until we return 185 * 0, signaling EOF perhaps. This could be used to sequence 186 * through CPUs for example. Since we print all cpu info in our 187 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 188 * we only allow for one "position". */ 189 return ((long)*pos < 1) ? (void *)1 : NULL; 190 } 191 192 static void * 193 c_next (struct seq_file *m, void *v, loff_t *pos) 194 { 195 ++*pos; 196 return c_start(m, pos); 197 } 198 199 static void 200 c_stop (struct seq_file *m, void *v) 201 { 202 } 203 204 const struct seq_operations cpuinfo_op = { 205 .start = c_start, 206 .next = c_next, 207 .stop = c_stop, 208 .show = show_cpuinfo 209 }; 210 211 static void __init parisc_proc_mkdir(void) 212 { 213 /* 214 ** Can't call proc_mkdir() until after proc_root_init() has been 215 ** called by start_kernel(). In other words, this code can't 216 ** live in arch/.../setup.c because start_parisc() calls 217 ** start_kernel(). 218 */ 219 switch (boot_cpu_data.cpu_type) { 220 case pcxl: 221 case pcxl2: 222 if (NULL == proc_gsc_root) 223 { 224 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 225 } 226 break; 227 case pcxt_: 228 case pcxu: 229 case pcxu_: 230 case pcxw: 231 case pcxw_: 232 case pcxw2: 233 if (NULL == proc_runway_root) 234 { 235 proc_runway_root = proc_mkdir("bus/runway", NULL); 236 } 237 break; 238 case mako: 239 case mako2: 240 if (NULL == proc_mckinley_root) 241 { 242 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 243 } 244 break; 245 default: 246 /* FIXME: this was added to prevent the compiler 247 * complaining about missing pcx, pcxs and pcxt 248 * I'm assuming they have neither gsc nor runway */ 249 break; 250 } 251 } 252 253 static struct resource central_bus = { 254 .name = "Central Bus", 255 .start = F_EXTEND(0xfff80000), 256 .end = F_EXTEND(0xfffaffff), 257 .flags = IORESOURCE_MEM, 258 }; 259 260 static struct resource local_broadcast = { 261 .name = "Local Broadcast", 262 .start = F_EXTEND(0xfffb0000), 263 .end = F_EXTEND(0xfffdffff), 264 .flags = IORESOURCE_MEM, 265 }; 266 267 static struct resource global_broadcast = { 268 .name = "Global Broadcast", 269 .start = F_EXTEND(0xfffe0000), 270 .end = F_EXTEND(0xffffffff), 271 .flags = IORESOURCE_MEM, 272 }; 273 274 static int __init parisc_init_resources(void) 275 { 276 int result; 277 278 result = request_resource(&iomem_resource, ¢ral_bus); 279 if (result < 0) { 280 printk(KERN_ERR 281 "%s: failed to claim %s address space!\n", 282 __FILE__, central_bus.name); 283 return result; 284 } 285 286 result = request_resource(&iomem_resource, &local_broadcast); 287 if (result < 0) { 288 printk(KERN_ERR 289 "%s: failed to claim %saddress space!\n", 290 __FILE__, local_broadcast.name); 291 return result; 292 } 293 294 result = request_resource(&iomem_resource, &global_broadcast); 295 if (result < 0) { 296 printk(KERN_ERR 297 "%s: failed to claim %s address space!\n", 298 __FILE__, global_broadcast.name); 299 return result; 300 } 301 302 return 0; 303 } 304 305 extern void gsc_init(void); 306 extern void processor_init(void); 307 extern void ccio_init(void); 308 extern void hppb_init(void); 309 extern void dino_init(void); 310 extern void iosapic_init(void); 311 extern void lba_init(void); 312 extern void sba_init(void); 313 extern void eisa_init(void); 314 315 static int __init parisc_init(void) 316 { 317 u32 osid = (OS_ID_LINUX << 16); 318 319 parisc_proc_mkdir(); 320 parisc_init_resources(); 321 do_device_inventory(); /* probe for hardware */ 322 323 parisc_pdc_chassis_init(); 324 325 /* set up a new led state on systems shipped LED State panel */ 326 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 327 328 /* tell PDC we're Linux. Nevermind failure. */ 329 pdc_stable_write(0x40, &osid, sizeof(osid)); 330 331 /* start with known state */ 332 flush_cache_all_local(); 333 flush_tlb_all_local(NULL); 334 335 processor_init(); 336 #ifdef CONFIG_SMP 337 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 338 num_online_cpus(), num_present_cpus(), 339 #else 340 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 341 #endif 342 boot_cpu_data.cpu_name, 343 boot_cpu_data.cpu_hz / 1000000, 344 boot_cpu_data.cpu_hz % 1000000 ); 345 346 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP) 347 /* Don't serialize TLB flushes if we run on one CPU only. */ 348 if (num_online_cpus() == 1) 349 pa_serialize_tlb_flushes = 0; 350 #endif 351 352 apply_alternatives_all(); 353 parisc_setup_cache_timing(); 354 355 /* These are in a non-obvious order, will fix when we have an iotree */ 356 #if defined(CONFIG_IOSAPIC) 357 iosapic_init(); 358 #endif 359 #if defined(CONFIG_IOMMU_SBA) 360 sba_init(); 361 #endif 362 #if defined(CONFIG_PCI_LBA) 363 lba_init(); 364 #endif 365 366 /* CCIO before any potential subdevices */ 367 #if defined(CONFIG_IOMMU_CCIO) 368 ccio_init(); 369 #endif 370 371 /* 372 * Need to register Asp & Wax before the EISA adapters for the IRQ 373 * regions. EISA must come before PCI to be sure it gets IRQ region 374 * 0. 375 */ 376 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 377 gsc_init(); 378 #endif 379 #ifdef CONFIG_EISA 380 eisa_init(); 381 #endif 382 383 #if defined(CONFIG_HPPB) 384 hppb_init(); 385 #endif 386 387 #if defined(CONFIG_GSC_DINO) 388 dino_init(); 389 #endif 390 391 #ifdef CONFIG_CHASSIS_LCD_LED 392 register_led_regions(); /* register LED port info in procfs */ 393 #endif 394 395 return 0; 396 } 397 arch_initcall(parisc_init); 398 399 void __init start_parisc(void) 400 { 401 extern void early_trap_init(void); 402 403 int ret, cpunum; 404 struct pdc_coproc_cfg coproc_cfg; 405 406 /* check QEMU/SeaBIOS marker in PAGE0 */ 407 running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0); 408 409 cpunum = smp_processor_id(); 410 411 init_cpu_topology(); 412 413 set_firmware_width_unlocked(); 414 415 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 416 if (ret >= 0 && coproc_cfg.ccr_functional) { 417 mtctl(coproc_cfg.ccr_functional, 10); 418 419 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 420 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 421 422 asm volatile ("fstd %fr0,8(%sp)"); 423 } else { 424 panic("must have an fpu to boot linux"); 425 } 426 427 early_trap_init(); /* initialize checksum of fault_vector */ 428 429 start_kernel(); 430 // not reached 431 } 432