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