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