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/processor.h> 44 #include <asm/sections.h> 45 #include <asm/pdc.h> 46 #include <asm/led.h> 47 #include <asm/machdep.h> /* for pa7300lc_init() proto */ 48 #include <asm/pdc_chassis.h> 49 #include <asm/io.h> 50 #include <asm/setup.h> 51 #include <asm/unwind.h> 52 #include <asm/smp.h> 53 54 static char __initdata command_line[COMMAND_LINE_SIZE]; 55 56 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ 57 struct proc_dir_entry * proc_runway_root __read_mostly = NULL; 58 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; 59 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; 60 61 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)) 62 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */ 63 EXPORT_SYMBOL(parisc_bus_is_phys); 64 #endif 65 66 void __init setup_cmdline(char **cmdline_p) 67 { 68 extern unsigned int boot_args[]; 69 70 /* Collect stuff passed in from the boot loader */ 71 72 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 73 if (boot_args[0] < 64) { 74 /* called from hpux boot loader */ 75 boot_command_line[0] = '\0'; 76 } else { 77 strlcpy(boot_command_line, (char *)__va(boot_args[1]), 78 COMMAND_LINE_SIZE); 79 80 #ifdef CONFIG_BLK_DEV_INITRD 81 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ 82 { 83 initrd_start = (unsigned long)__va(boot_args[2]); 84 initrd_end = (unsigned long)__va(boot_args[3]); 85 } 86 #endif 87 } 88 89 strcpy(command_line, boot_command_line); 90 *cmdline_p = command_line; 91 } 92 93 #ifdef CONFIG_PA11 94 void __init dma_ops_init(void) 95 { 96 switch (boot_cpu_data.cpu_type) { 97 case pcx: 98 /* 99 * We've got way too many dependencies on 1.1 semantics 100 * to support 1.0 boxes at this point. 101 */ 102 panic( "PA-RISC Linux currently only supports machines that conform to\n" 103 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 104 105 case pcxs: 106 case pcxt: 107 hppa_dma_ops = &pcx_dma_ops; 108 break; 109 case pcxl2: 110 pa7300lc_init(); 111 case pcxl: /* falls through */ 112 hppa_dma_ops = &pcxl_dma_ops; 113 break; 114 default: 115 break; 116 } 117 } 118 #endif 119 120 extern void collect_boot_cpu_data(void); 121 122 void __init setup_arch(char **cmdline_p) 123 { 124 #ifdef CONFIG_64BIT 125 extern int parisc_narrow_firmware; 126 #endif 127 unwind_init(); 128 129 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 130 131 #ifdef CONFIG_64BIT 132 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 133 #else 134 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 135 #endif 136 137 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 138 (int)(PAGE_SIZE / 1024)); 139 #ifdef CONFIG_HUGETLB_PAGE 140 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 141 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 142 #else 143 printk(KERN_CONT "disabled"); 144 #endif 145 printk(KERN_CONT ".\n"); 146 147 /* 148 * Check if initial kernel page mappings are sufficient. 149 * panic early if not, else we may access kernel functions 150 * and variables which can't be reached. 151 */ 152 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 153 panic("KERNEL_INITIAL_ORDER too small!"); 154 155 pdc_console_init(); 156 157 #ifdef CONFIG_64BIT 158 if(parisc_narrow_firmware) { 159 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 160 } 161 #endif 162 setup_pdc(); 163 setup_cmdline(cmdline_p); 164 collect_boot_cpu_data(); 165 do_memory_inventory(); /* probe for physical memory */ 166 parisc_cache_init(); 167 paging_init(); 168 169 #ifdef CONFIG_CHASSIS_LCD_LED 170 /* initialize the LCD/LED after boot_cpu_data is available ! */ 171 led_init(); /* LCD/LED initialization */ 172 #endif 173 174 #ifdef CONFIG_PA11 175 dma_ops_init(); 176 #endif 177 178 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) 179 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */ 180 #endif 181 182 clear_sched_clock_stable(); 183 } 184 185 /* 186 * Display CPU info for all CPUs. 187 * for parisc this is in processor.c 188 */ 189 extern int show_cpuinfo (struct seq_file *m, void *v); 190 191 static void * 192 c_start (struct seq_file *m, loff_t *pos) 193 { 194 /* Looks like the caller will call repeatedly until we return 195 * 0, signaling EOF perhaps. This could be used to sequence 196 * through CPUs for example. Since we print all cpu info in our 197 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 198 * we only allow for one "position". */ 199 return ((long)*pos < 1) ? (void *)1 : NULL; 200 } 201 202 static void * 203 c_next (struct seq_file *m, void *v, loff_t *pos) 204 { 205 ++*pos; 206 return c_start(m, pos); 207 } 208 209 static void 210 c_stop (struct seq_file *m, void *v) 211 { 212 } 213 214 const struct seq_operations cpuinfo_op = { 215 .start = c_start, 216 .next = c_next, 217 .stop = c_stop, 218 .show = show_cpuinfo 219 }; 220 221 static void __init parisc_proc_mkdir(void) 222 { 223 /* 224 ** Can't call proc_mkdir() until after proc_root_init() has been 225 ** called by start_kernel(). In other words, this code can't 226 ** live in arch/.../setup.c because start_parisc() calls 227 ** start_kernel(). 228 */ 229 switch (boot_cpu_data.cpu_type) { 230 case pcxl: 231 case pcxl2: 232 if (NULL == proc_gsc_root) 233 { 234 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 235 } 236 break; 237 case pcxt_: 238 case pcxu: 239 case pcxu_: 240 case pcxw: 241 case pcxw_: 242 case pcxw2: 243 if (NULL == proc_runway_root) 244 { 245 proc_runway_root = proc_mkdir("bus/runway", NULL); 246 } 247 break; 248 case mako: 249 case mako2: 250 if (NULL == proc_mckinley_root) 251 { 252 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 253 } 254 break; 255 default: 256 /* FIXME: this was added to prevent the compiler 257 * complaining about missing pcx, pcxs and pcxt 258 * I'm assuming they have neither gsc nor runway */ 259 break; 260 } 261 } 262 263 static struct resource central_bus = { 264 .name = "Central Bus", 265 .start = F_EXTEND(0xfff80000), 266 .end = F_EXTEND(0xfffaffff), 267 .flags = IORESOURCE_MEM, 268 }; 269 270 static struct resource local_broadcast = { 271 .name = "Local Broadcast", 272 .start = F_EXTEND(0xfffb0000), 273 .end = F_EXTEND(0xfffdffff), 274 .flags = IORESOURCE_MEM, 275 }; 276 277 static struct resource global_broadcast = { 278 .name = "Global Broadcast", 279 .start = F_EXTEND(0xfffe0000), 280 .end = F_EXTEND(0xffffffff), 281 .flags = IORESOURCE_MEM, 282 }; 283 284 static int __init parisc_init_resources(void) 285 { 286 int result; 287 288 result = request_resource(&iomem_resource, ¢ral_bus); 289 if (result < 0) { 290 printk(KERN_ERR 291 "%s: failed to claim %s address space!\n", 292 __FILE__, central_bus.name); 293 return result; 294 } 295 296 result = request_resource(&iomem_resource, &local_broadcast); 297 if (result < 0) { 298 printk(KERN_ERR 299 "%s: failed to claim %saddress space!\n", 300 __FILE__, local_broadcast.name); 301 return result; 302 } 303 304 result = request_resource(&iomem_resource, &global_broadcast); 305 if (result < 0) { 306 printk(KERN_ERR 307 "%s: failed to claim %s address space!\n", 308 __FILE__, global_broadcast.name); 309 return result; 310 } 311 312 return 0; 313 } 314 315 extern void gsc_init(void); 316 extern void processor_init(void); 317 extern void ccio_init(void); 318 extern void hppb_init(void); 319 extern void dino_init(void); 320 extern void iosapic_init(void); 321 extern void lba_init(void); 322 extern void sba_init(void); 323 extern void eisa_init(void); 324 325 static int __init parisc_init(void) 326 { 327 u32 osid = (OS_ID_LINUX << 16); 328 329 parisc_proc_mkdir(); 330 parisc_init_resources(); 331 do_device_inventory(); /* probe for hardware */ 332 333 parisc_pdc_chassis_init(); 334 335 /* set up a new led state on systems shipped LED State panel */ 336 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 337 338 /* tell PDC we're Linux. Nevermind failure. */ 339 pdc_stable_write(0x40, &osid, sizeof(osid)); 340 341 /* start with known state */ 342 flush_cache_all_local(); 343 flush_tlb_all_local(NULL); 344 345 processor_init(); 346 #ifdef CONFIG_SMP 347 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 348 num_online_cpus(), num_present_cpus(), 349 #else 350 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 351 #endif 352 boot_cpu_data.cpu_name, 353 boot_cpu_data.cpu_hz / 1000000, 354 boot_cpu_data.cpu_hz % 1000000 ); 355 356 parisc_setup_cache_timing(); 357 358 /* These are in a non-obvious order, will fix when we have an iotree */ 359 #if defined(CONFIG_IOSAPIC) 360 iosapic_init(); 361 #endif 362 #if defined(CONFIG_IOMMU_SBA) 363 sba_init(); 364 #endif 365 #if defined(CONFIG_PCI_LBA) 366 lba_init(); 367 #endif 368 369 /* CCIO before any potential subdevices */ 370 #if defined(CONFIG_IOMMU_CCIO) 371 ccio_init(); 372 #endif 373 374 /* 375 * Need to register Asp & Wax before the EISA adapters for the IRQ 376 * regions. EISA must come before PCI to be sure it gets IRQ region 377 * 0. 378 */ 379 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 380 gsc_init(); 381 #endif 382 #ifdef CONFIG_EISA 383 eisa_init(); 384 #endif 385 386 #if defined(CONFIG_HPPB) 387 hppb_init(); 388 #endif 389 390 #if defined(CONFIG_GSC_DINO) 391 dino_init(); 392 #endif 393 394 #ifdef CONFIG_CHASSIS_LCD_LED 395 register_led_regions(); /* register LED port info in procfs */ 396 #endif 397 398 return 0; 399 } 400 arch_initcall(parisc_init); 401 402 void __init start_parisc(void) 403 { 404 extern void early_trap_init(void); 405 406 int ret, cpunum; 407 struct pdc_coproc_cfg coproc_cfg; 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