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 41 #include <asm/processor.h> 42 #include <asm/sections.h> 43 #include <asm/pdc.h> 44 #include <asm/led.h> 45 #include <asm/machdep.h> /* for pa7300lc_init() proto */ 46 #include <asm/pdc_chassis.h> 47 #include <asm/io.h> 48 #include <asm/setup.h> 49 #include <asm/unwind.h> 50 51 static char __initdata command_line[COMMAND_LINE_SIZE]; 52 53 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ 54 struct proc_dir_entry * proc_runway_root __read_mostly = NULL; 55 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; 56 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; 57 58 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)) 59 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */ 60 EXPORT_SYMBOL(parisc_bus_is_phys); 61 #endif 62 63 void __init setup_cmdline(char **cmdline_p) 64 { 65 extern unsigned int boot_args[]; 66 67 /* Collect stuff passed in from the boot loader */ 68 69 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 70 if (boot_args[0] < 64) { 71 /* called from hpux boot loader */ 72 boot_command_line[0] = '\0'; 73 } else { 74 strlcpy(boot_command_line, (char *)__va(boot_args[1]), 75 COMMAND_LINE_SIZE); 76 77 #ifdef CONFIG_BLK_DEV_INITRD 78 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ 79 { 80 initrd_start = (unsigned long)__va(boot_args[2]); 81 initrd_end = (unsigned long)__va(boot_args[3]); 82 } 83 #endif 84 } 85 86 strcpy(command_line, boot_command_line); 87 *cmdline_p = command_line; 88 } 89 90 #ifdef CONFIG_PA11 91 void __init dma_ops_init(void) 92 { 93 switch (boot_cpu_data.cpu_type) { 94 case pcx: 95 /* 96 * We've got way too many dependencies on 1.1 semantics 97 * to support 1.0 boxes at this point. 98 */ 99 panic( "PA-RISC Linux currently only supports machines that conform to\n" 100 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 101 102 case pcxs: 103 case pcxt: 104 hppa_dma_ops = &pcx_dma_ops; 105 break; 106 case pcxl2: 107 pa7300lc_init(); 108 case pcxl: /* falls through */ 109 hppa_dma_ops = &pcxl_dma_ops; 110 break; 111 default: 112 break; 113 } 114 } 115 #endif 116 117 extern int init_per_cpu(int cpuid); 118 extern void collect_boot_cpu_data(void); 119 120 void __init setup_arch(char **cmdline_p) 121 { 122 #ifdef CONFIG_64BIT 123 extern int parisc_narrow_firmware; 124 #endif 125 unwind_init(); 126 127 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 128 129 #ifdef CONFIG_64BIT 130 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 131 #else 132 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 133 #endif 134 135 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 136 (int)(PAGE_SIZE / 1024)); 137 #ifdef CONFIG_HUGETLB_PAGE 138 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 139 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 140 #else 141 printk(KERN_CONT "disabled"); 142 #endif 143 printk(KERN_CONT ".\n"); 144 145 /* 146 * Check if initial kernel page mappings are sufficient. 147 * panic early if not, else we may access kernel functions 148 * and variables which can't be reached. 149 */ 150 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 151 panic("KERNEL_INITIAL_ORDER too small!"); 152 153 pdc_console_init(); 154 155 #ifdef CONFIG_64BIT 156 if(parisc_narrow_firmware) { 157 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 158 } 159 #endif 160 setup_pdc(); 161 setup_cmdline(cmdline_p); 162 collect_boot_cpu_data(); 163 do_memory_inventory(); /* probe for physical memory */ 164 parisc_cache_init(); 165 paging_init(); 166 167 #ifdef CONFIG_CHASSIS_LCD_LED 168 /* initialize the LCD/LED after boot_cpu_data is available ! */ 169 led_init(); /* LCD/LED initialization */ 170 #endif 171 172 #ifdef CONFIG_PA11 173 dma_ops_init(); 174 #endif 175 176 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) 177 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */ 178 #endif 179 180 clear_sched_clock_stable(); 181 } 182 183 /* 184 * Display CPU info for all CPUs. 185 * for parisc this is in processor.c 186 */ 187 extern int show_cpuinfo (struct seq_file *m, void *v); 188 189 static void * 190 c_start (struct seq_file *m, loff_t *pos) 191 { 192 /* Looks like the caller will call repeatedly until we return 193 * 0, signaling EOF perhaps. This could be used to sequence 194 * through CPUs for example. Since we print all cpu info in our 195 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 196 * we only allow for one "position". */ 197 return ((long)*pos < 1) ? (void *)1 : NULL; 198 } 199 200 static void * 201 c_next (struct seq_file *m, void *v, loff_t *pos) 202 { 203 ++*pos; 204 return c_start(m, pos); 205 } 206 207 static void 208 c_stop (struct seq_file *m, void *v) 209 { 210 } 211 212 const struct seq_operations cpuinfo_op = { 213 .start = c_start, 214 .next = c_next, 215 .stop = c_stop, 216 .show = show_cpuinfo 217 }; 218 219 static void __init parisc_proc_mkdir(void) 220 { 221 /* 222 ** Can't call proc_mkdir() until after proc_root_init() has been 223 ** called by start_kernel(). In other words, this code can't 224 ** live in arch/.../setup.c because start_parisc() calls 225 ** start_kernel(). 226 */ 227 switch (boot_cpu_data.cpu_type) { 228 case pcxl: 229 case pcxl2: 230 if (NULL == proc_gsc_root) 231 { 232 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 233 } 234 break; 235 case pcxt_: 236 case pcxu: 237 case pcxu_: 238 case pcxw: 239 case pcxw_: 240 case pcxw2: 241 if (NULL == proc_runway_root) 242 { 243 proc_runway_root = proc_mkdir("bus/runway", NULL); 244 } 245 break; 246 case mako: 247 case mako2: 248 if (NULL == proc_mckinley_root) 249 { 250 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 251 } 252 break; 253 default: 254 /* FIXME: this was added to prevent the compiler 255 * complaining about missing pcx, pcxs and pcxt 256 * I'm assuming they have neither gsc nor runway */ 257 break; 258 } 259 } 260 261 static struct resource central_bus = { 262 .name = "Central Bus", 263 .start = F_EXTEND(0xfff80000), 264 .end = F_EXTEND(0xfffaffff), 265 .flags = IORESOURCE_MEM, 266 }; 267 268 static struct resource local_broadcast = { 269 .name = "Local Broadcast", 270 .start = F_EXTEND(0xfffb0000), 271 .end = F_EXTEND(0xfffdffff), 272 .flags = IORESOURCE_MEM, 273 }; 274 275 static struct resource global_broadcast = { 276 .name = "Global Broadcast", 277 .start = F_EXTEND(0xfffe0000), 278 .end = F_EXTEND(0xffffffff), 279 .flags = IORESOURCE_MEM, 280 }; 281 282 static int __init parisc_init_resources(void) 283 { 284 int result; 285 286 result = request_resource(&iomem_resource, ¢ral_bus); 287 if (result < 0) { 288 printk(KERN_ERR 289 "%s: failed to claim %s address space!\n", 290 __FILE__, central_bus.name); 291 return result; 292 } 293 294 result = request_resource(&iomem_resource, &local_broadcast); 295 if (result < 0) { 296 printk(KERN_ERR 297 "%s: failed to claim %saddress space!\n", 298 __FILE__, local_broadcast.name); 299 return result; 300 } 301 302 result = request_resource(&iomem_resource, &global_broadcast); 303 if (result < 0) { 304 printk(KERN_ERR 305 "%s: failed to claim %s address space!\n", 306 __FILE__, global_broadcast.name); 307 return result; 308 } 309 310 return 0; 311 } 312 313 extern void gsc_init(void); 314 extern void processor_init(void); 315 extern void ccio_init(void); 316 extern void hppb_init(void); 317 extern void dino_init(void); 318 extern void iosapic_init(void); 319 extern void lba_init(void); 320 extern void sba_init(void); 321 extern void eisa_init(void); 322 323 static int __init parisc_init(void) 324 { 325 u32 osid = (OS_ID_LINUX << 16); 326 327 parisc_proc_mkdir(); 328 parisc_init_resources(); 329 do_device_inventory(); /* probe for hardware */ 330 331 parisc_pdc_chassis_init(); 332 333 /* set up a new led state on systems shipped LED State panel */ 334 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 335 336 /* tell PDC we're Linux. Nevermind failure. */ 337 pdc_stable_write(0x40, &osid, sizeof(osid)); 338 339 /* start with known state */ 340 flush_cache_all_local(); 341 flush_tlb_all_local(NULL); 342 343 processor_init(); 344 #ifdef CONFIG_SMP 345 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 346 num_online_cpus(), num_present_cpus(), 347 #else 348 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 349 #endif 350 boot_cpu_data.cpu_name, 351 boot_cpu_data.cpu_hz / 1000000, 352 boot_cpu_data.cpu_hz % 1000000 ); 353 354 parisc_setup_cache_timing(); 355 356 /* These are in a non-obvious order, will fix when we have an iotree */ 357 #if defined(CONFIG_IOSAPIC) 358 iosapic_init(); 359 #endif 360 #if defined(CONFIG_IOMMU_SBA) 361 sba_init(); 362 #endif 363 #if defined(CONFIG_PCI_LBA) 364 lba_init(); 365 #endif 366 367 /* CCIO before any potential subdevices */ 368 #if defined(CONFIG_IOMMU_CCIO) 369 ccio_init(); 370 #endif 371 372 /* 373 * Need to register Asp & Wax before the EISA adapters for the IRQ 374 * regions. EISA must come before PCI to be sure it gets IRQ region 375 * 0. 376 */ 377 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 378 gsc_init(); 379 #endif 380 #ifdef CONFIG_EISA 381 eisa_init(); 382 #endif 383 384 #if defined(CONFIG_HPPB) 385 hppb_init(); 386 #endif 387 388 #if defined(CONFIG_GSC_DINO) 389 dino_init(); 390 #endif 391 392 #ifdef CONFIG_CHASSIS_LCD_LED 393 register_led_regions(); /* register LED port info in procfs */ 394 #endif 395 396 return 0; 397 } 398 arch_initcall(parisc_init); 399 400 void start_parisc(void) 401 { 402 extern void start_kernel(void); 403 extern void early_trap_init(void); 404 405 int ret, cpunum; 406 struct pdc_coproc_cfg coproc_cfg; 407 408 cpunum = smp_processor_id(); 409 410 set_firmware_width_unlocked(); 411 412 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 413 if (ret >= 0 && coproc_cfg.ccr_functional) { 414 mtctl(coproc_cfg.ccr_functional, 10); 415 416 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 417 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 418 419 asm volatile ("fstd %fr0,8(%sp)"); 420 } else { 421 panic("must have an fpu to boot linux"); 422 } 423 424 early_trap_init(); /* initialize checksum of fault_vector */ 425 426 start_kernel(); 427 // not reached 428 } 429