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 42 #include <asm/processor.h> 43 #include <asm/sections.h> 44 #include <asm/pdc.h> 45 #include <asm/led.h> 46 #include <asm/machdep.h> /* for pa7300lc_init() proto */ 47 #include <asm/pdc_chassis.h> 48 #include <asm/io.h> 49 #include <asm/setup.h> 50 #include <asm/unwind.h> 51 52 static char __initdata command_line[COMMAND_LINE_SIZE]; 53 54 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */ 55 struct proc_dir_entry * proc_runway_root __read_mostly = NULL; 56 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL; 57 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL; 58 59 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA)) 60 int parisc_bus_is_phys __read_mostly = 1; /* Assume no IOMMU is present */ 61 EXPORT_SYMBOL(parisc_bus_is_phys); 62 #endif 63 64 void __init setup_cmdline(char **cmdline_p) 65 { 66 extern unsigned int boot_args[]; 67 68 /* Collect stuff passed in from the boot loader */ 69 70 /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */ 71 if (boot_args[0] < 64) { 72 /* called from hpux boot loader */ 73 boot_command_line[0] = '\0'; 74 } else { 75 strlcpy(boot_command_line, (char *)__va(boot_args[1]), 76 COMMAND_LINE_SIZE); 77 78 #ifdef CONFIG_BLK_DEV_INITRD 79 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */ 80 { 81 initrd_start = (unsigned long)__va(boot_args[2]); 82 initrd_end = (unsigned long)__va(boot_args[3]); 83 } 84 #endif 85 } 86 87 strcpy(command_line, boot_command_line); 88 *cmdline_p = command_line; 89 } 90 91 #ifdef CONFIG_PA11 92 void __init dma_ops_init(void) 93 { 94 switch (boot_cpu_data.cpu_type) { 95 case pcx: 96 /* 97 * We've got way too many dependencies on 1.1 semantics 98 * to support 1.0 boxes at this point. 99 */ 100 panic( "PA-RISC Linux currently only supports machines that conform to\n" 101 "the PA-RISC 1.1 or 2.0 architecture specification.\n"); 102 103 case pcxs: 104 case pcxt: 105 hppa_dma_ops = &pcx_dma_ops; 106 break; 107 case pcxl2: 108 pa7300lc_init(); 109 case pcxl: /* falls through */ 110 hppa_dma_ops = &pcxl_dma_ops; 111 break; 112 default: 113 break; 114 } 115 } 116 #endif 117 118 extern int init_per_cpu(int cpuid); 119 extern void collect_boot_cpu_data(void); 120 121 void __init setup_arch(char **cmdline_p) 122 { 123 #ifdef CONFIG_64BIT 124 extern int parisc_narrow_firmware; 125 #endif 126 unwind_init(); 127 128 init_per_cpu(smp_processor_id()); /* Set Modes & Enable FP */ 129 130 #ifdef CONFIG_64BIT 131 printk(KERN_INFO "The 64-bit Kernel has started...\n"); 132 #else 133 printk(KERN_INFO "The 32-bit Kernel has started...\n"); 134 #endif 135 136 printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ", 137 (int)(PAGE_SIZE / 1024)); 138 #ifdef CONFIG_HUGETLB_PAGE 139 printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size", 140 1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20)); 141 #else 142 printk(KERN_CONT "disabled"); 143 #endif 144 printk(KERN_CONT ".\n"); 145 146 /* 147 * Check if initial kernel page mappings are sufficient. 148 * panic early if not, else we may access kernel functions 149 * and variables which can't be reached. 150 */ 151 if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE) 152 panic("KERNEL_INITIAL_ORDER too small!"); 153 154 pdc_console_init(); 155 156 #ifdef CONFIG_64BIT 157 if(parisc_narrow_firmware) { 158 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n"); 159 } 160 #endif 161 setup_pdc(); 162 setup_cmdline(cmdline_p); 163 collect_boot_cpu_data(); 164 do_memory_inventory(); /* probe for physical memory */ 165 parisc_cache_init(); 166 paging_init(); 167 168 #ifdef CONFIG_CHASSIS_LCD_LED 169 /* initialize the LCD/LED after boot_cpu_data is available ! */ 170 led_init(); /* LCD/LED initialization */ 171 #endif 172 173 #ifdef CONFIG_PA11 174 dma_ops_init(); 175 #endif 176 177 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE) 178 conswitchp = &dummy_con; /* we use do_take_over_console() later ! */ 179 #endif 180 181 clear_sched_clock_stable(); 182 } 183 184 /* 185 * Display CPU info for all CPUs. 186 * for parisc this is in processor.c 187 */ 188 extern int show_cpuinfo (struct seq_file *m, void *v); 189 190 static void * 191 c_start (struct seq_file *m, loff_t *pos) 192 { 193 /* Looks like the caller will call repeatedly until we return 194 * 0, signaling EOF perhaps. This could be used to sequence 195 * through CPUs for example. Since we print all cpu info in our 196 * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above) 197 * we only allow for one "position". */ 198 return ((long)*pos < 1) ? (void *)1 : NULL; 199 } 200 201 static void * 202 c_next (struct seq_file *m, void *v, loff_t *pos) 203 { 204 ++*pos; 205 return c_start(m, pos); 206 } 207 208 static void 209 c_stop (struct seq_file *m, void *v) 210 { 211 } 212 213 const struct seq_operations cpuinfo_op = { 214 .start = c_start, 215 .next = c_next, 216 .stop = c_stop, 217 .show = show_cpuinfo 218 }; 219 220 static void __init parisc_proc_mkdir(void) 221 { 222 /* 223 ** Can't call proc_mkdir() until after proc_root_init() has been 224 ** called by start_kernel(). In other words, this code can't 225 ** live in arch/.../setup.c because start_parisc() calls 226 ** start_kernel(). 227 */ 228 switch (boot_cpu_data.cpu_type) { 229 case pcxl: 230 case pcxl2: 231 if (NULL == proc_gsc_root) 232 { 233 proc_gsc_root = proc_mkdir("bus/gsc", NULL); 234 } 235 break; 236 case pcxt_: 237 case pcxu: 238 case pcxu_: 239 case pcxw: 240 case pcxw_: 241 case pcxw2: 242 if (NULL == proc_runway_root) 243 { 244 proc_runway_root = proc_mkdir("bus/runway", NULL); 245 } 246 break; 247 case mako: 248 case mako2: 249 if (NULL == proc_mckinley_root) 250 { 251 proc_mckinley_root = proc_mkdir("bus/mckinley", NULL); 252 } 253 break; 254 default: 255 /* FIXME: this was added to prevent the compiler 256 * complaining about missing pcx, pcxs and pcxt 257 * I'm assuming they have neither gsc nor runway */ 258 break; 259 } 260 } 261 262 static struct resource central_bus = { 263 .name = "Central Bus", 264 .start = F_EXTEND(0xfff80000), 265 .end = F_EXTEND(0xfffaffff), 266 .flags = IORESOURCE_MEM, 267 }; 268 269 static struct resource local_broadcast = { 270 .name = "Local Broadcast", 271 .start = F_EXTEND(0xfffb0000), 272 .end = F_EXTEND(0xfffdffff), 273 .flags = IORESOURCE_MEM, 274 }; 275 276 static struct resource global_broadcast = { 277 .name = "Global Broadcast", 278 .start = F_EXTEND(0xfffe0000), 279 .end = F_EXTEND(0xffffffff), 280 .flags = IORESOURCE_MEM, 281 }; 282 283 static int __init parisc_init_resources(void) 284 { 285 int result; 286 287 result = request_resource(&iomem_resource, ¢ral_bus); 288 if (result < 0) { 289 printk(KERN_ERR 290 "%s: failed to claim %s address space!\n", 291 __FILE__, central_bus.name); 292 return result; 293 } 294 295 result = request_resource(&iomem_resource, &local_broadcast); 296 if (result < 0) { 297 printk(KERN_ERR 298 "%s: failed to claim %saddress space!\n", 299 __FILE__, local_broadcast.name); 300 return result; 301 } 302 303 result = request_resource(&iomem_resource, &global_broadcast); 304 if (result < 0) { 305 printk(KERN_ERR 306 "%s: failed to claim %s address space!\n", 307 __FILE__, global_broadcast.name); 308 return result; 309 } 310 311 return 0; 312 } 313 314 extern void gsc_init(void); 315 extern void processor_init(void); 316 extern void ccio_init(void); 317 extern void hppb_init(void); 318 extern void dino_init(void); 319 extern void iosapic_init(void); 320 extern void lba_init(void); 321 extern void sba_init(void); 322 extern void eisa_init(void); 323 324 static int __init parisc_init(void) 325 { 326 u32 osid = (OS_ID_LINUX << 16); 327 328 parisc_proc_mkdir(); 329 parisc_init_resources(); 330 do_device_inventory(); /* probe for hardware */ 331 332 parisc_pdc_chassis_init(); 333 334 /* set up a new led state on systems shipped LED State panel */ 335 pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART); 336 337 /* tell PDC we're Linux. Nevermind failure. */ 338 pdc_stable_write(0x40, &osid, sizeof(osid)); 339 340 /* start with known state */ 341 flush_cache_all_local(); 342 flush_tlb_all_local(NULL); 343 344 processor_init(); 345 #ifdef CONFIG_SMP 346 pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n", 347 num_online_cpus(), num_present_cpus(), 348 #else 349 pr_info("CPU(s): 1 x %s at %d.%06d MHz\n", 350 #endif 351 boot_cpu_data.cpu_name, 352 boot_cpu_data.cpu_hz / 1000000, 353 boot_cpu_data.cpu_hz % 1000000 ); 354 355 parisc_setup_cache_timing(); 356 357 /* These are in a non-obvious order, will fix when we have an iotree */ 358 #if defined(CONFIG_IOSAPIC) 359 iosapic_init(); 360 #endif 361 #if defined(CONFIG_IOMMU_SBA) 362 sba_init(); 363 #endif 364 #if defined(CONFIG_PCI_LBA) 365 lba_init(); 366 #endif 367 368 /* CCIO before any potential subdevices */ 369 #if defined(CONFIG_IOMMU_CCIO) 370 ccio_init(); 371 #endif 372 373 /* 374 * Need to register Asp & Wax before the EISA adapters for the IRQ 375 * regions. EISA must come before PCI to be sure it gets IRQ region 376 * 0. 377 */ 378 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX) 379 gsc_init(); 380 #endif 381 #ifdef CONFIG_EISA 382 eisa_init(); 383 #endif 384 385 #if defined(CONFIG_HPPB) 386 hppb_init(); 387 #endif 388 389 #if defined(CONFIG_GSC_DINO) 390 dino_init(); 391 #endif 392 393 #ifdef CONFIG_CHASSIS_LCD_LED 394 register_led_regions(); /* register LED port info in procfs */ 395 #endif 396 397 return 0; 398 } 399 arch_initcall(parisc_init); 400 401 void start_parisc(void) 402 { 403 extern void start_kernel(void); 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 set_firmware_width_unlocked(); 412 413 ret = pdc_coproc_cfg_unlocked(&coproc_cfg); 414 if (ret >= 0 && coproc_cfg.ccr_functional) { 415 mtctl(coproc_cfg.ccr_functional, 10); 416 417 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision; 418 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model; 419 420 asm volatile ("fstd %fr0,8(%sp)"); 421 } else { 422 panic("must have an fpu to boot linux"); 423 } 424 425 early_trap_init(); /* initialize checksum of fault_vector */ 426 427 start_kernel(); 428 // not reached 429 } 430