arch/parisc/kernel/setup.c

   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 "Default page size is %dKB.\n", (int)(PAGE_SIZE / 1024));
 134
 135         pdc_console_init();
 136
 137 #ifdef CONFIG_64BIT
 138         if(parisc_narrow_firmware) {
 139                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 140         }
 141 #endif
 142         setup_pdc();
 143         setup_cmdline(cmdline_p);
 144         collect_boot_cpu_data();
 145         do_memory_inventory();  /* probe for physical memory */
 146         parisc_cache_init();
 147         paging_init();
 148
 149 #ifdef CONFIG_CHASSIS_LCD_LED
 150         /* initialize the LCD/LED after boot_cpu_data is available ! */
 151         led_init();             /* LCD/LED initialization */
 152 #endif
 153
 154 #ifdef CONFIG_PA11
 155         dma_ops_init();
 156 #endif
 157
 158 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 159         conswitchp = &dummy_con;        /* we use do_take_over_console() later ! */
 160 #endif
 161
 162 }
 163
 164 /*
 165  * Display CPU info for all CPUs.
 166  * for parisc this is in processor.c
 167  */
 168 extern int show_cpuinfo (struct seq_file *m, void *v);
 169
 170 static void *
 171 c_start (struct seq_file *m, loff_t *pos)
 172 {
 173         /* Looks like the caller will call repeatedly until we return
 174          * 0, signaling EOF perhaps.  This could be used to sequence
 175          * through CPUs for example.  Since we print all cpu info in our
 176          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 177          * we only allow for one "position".  */
 178         return ((long)*pos < 1) ? (void *)1 : NULL;
 179 }
 180
 181 static void *
 182 c_next (struct seq_file *m, void *v, loff_t *pos)
 183 {
 184         ++*pos;
 185         return c_start(m, pos);
 186 }
 187
 188 static void
 189 c_stop (struct seq_file *m, void *v)
 190 {
 191 }
 192
 193 const struct seq_operations cpuinfo_op = {
 194         .start  = c_start,
 195         .next   = c_next,
 196         .stop   = c_stop,
 197         .show   = show_cpuinfo
 198 };
 199
 200 static void __init parisc_proc_mkdir(void)
 201 {
 202         /*
 203         ** Can't call proc_mkdir() until after proc_root_init() has been
 204         ** called by start_kernel(). In other words, this code can't
 205         ** live in arch/.../setup.c because start_parisc() calls
 206         ** start_kernel().
 207         */
 208         switch (boot_cpu_data.cpu_type) {
 209         case pcxl:
 210         case pcxl2:
 211                 if (NULL == proc_gsc_root)
 212                 {
 213                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 214                 }
 215                 break;
 216         case pcxt_:
 217         case pcxu:
 218         case pcxu_:
 219         case pcxw:
 220         case pcxw_:
 221         case pcxw2:
 222                 if (NULL == proc_runway_root)
 223                 {
 224                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 225                 }
 226                 break;
 227         case mako:
 228         case mako2:
 229                 if (NULL == proc_mckinley_root)
 230                 {
 231                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 232                 }
 233                 break;
 234         default:
 235                 /* FIXME: this was added to prevent the compiler
 236                  * complaining about missing pcx, pcxs and pcxt
 237                  * I'm assuming they have neither gsc nor runway */
 238                 break;
 239         }
 240 }
 241
 242 static struct resource central_bus = {
 243         .name   = "Central Bus",
 244         .start  = F_EXTEND(0xfff80000),
 245         .end    = F_EXTEND(0xfffaffff),
 246         .flags  = IORESOURCE_MEM,
 247 };
 248
 249 static struct resource local_broadcast = {
 250         .name   = "Local Broadcast",
 251         .start  = F_EXTEND(0xfffb0000),
 252         .end    = F_EXTEND(0xfffdffff),
 253         .flags  = IORESOURCE_MEM,
 254 };
 255
 256 static struct resource global_broadcast = {
 257         .name   = "Global Broadcast",
 258         .start  = F_EXTEND(0xfffe0000),
 259         .end    = F_EXTEND(0xffffffff),
 260         .flags  = IORESOURCE_MEM,
 261 };
 262
 263 static int __init parisc_init_resources(void)
 264 {
 265         int result;
 266
 267         result = request_resource(&iomem_resource, &central_bus);
 268         if (result < 0) {
 269                 printk(KERN_ERR
 270                        "%s: failed to claim %s address space!\n",
 271                        __FILE__, central_bus.name);
 272                 return result;
 273         }
 274
 275         result = request_resource(&iomem_resource, &local_broadcast);
 276         if (result < 0) {
 277                 printk(KERN_ERR
 278                        "%s: failed to claim %saddress space!\n",
 279                        __FILE__, local_broadcast.name);
 280                 return result;
 281         }
 282
 283         result = request_resource(&iomem_resource, &global_broadcast);
 284         if (result < 0) {
 285                 printk(KERN_ERR
 286                        "%s: failed to claim %s address space!\n",
 287                        __FILE__, global_broadcast.name);
 288                 return result;
 289         }
 290
 291         return 0;
 292 }
 293
 294 extern void gsc_init(void);
 295 extern void processor_init(void);
 296 extern void ccio_init(void);
 297 extern void hppb_init(void);
 298 extern void dino_init(void);
 299 extern void iosapic_init(void);
 300 extern void lba_init(void);
 301 extern void sba_init(void);
 302 extern void eisa_init(void);
 303
 304 static int __init parisc_init(void)
 305 {
 306         u32 osid = (OS_ID_LINUX << 16);
 307
 308         parisc_proc_mkdir();
 309         parisc_init_resources();
 310         do_device_inventory();                  /* probe for hardware */
 311
 312         parisc_pdc_chassis_init();
 313
 314         /* set up a new led state on systems shipped LED State panel */
 315         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 316
 317         /* tell PDC we're Linux. Nevermind failure. */
 318         pdc_stable_write(0x40, &osid, sizeof(osid));
 319
 320         processor_init();
 321 #ifdef CONFIG_SMP
 322         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 323                 num_online_cpus(), num_present_cpus(),
 324 #else
 325         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 326 #endif
 327                         boot_cpu_data.cpu_name,
 328                         boot_cpu_data.cpu_hz / 1000000,
 329                         boot_cpu_data.cpu_hz % 1000000  );
 330
 331         parisc_setup_cache_timing();
 332
 333         /* These are in a non-obvious order, will fix when we have an iotree */
 334 #if defined(CONFIG_IOSAPIC)
 335         iosapic_init();
 336 #endif
 337 #if defined(CONFIG_IOMMU_SBA)
 338         sba_init();
 339 #endif
 340 #if defined(CONFIG_PCI_LBA)
 341         lba_init();
 342 #endif
 343
 344         /* CCIO before any potential subdevices */
 345 #if defined(CONFIG_IOMMU_CCIO)
 346         ccio_init();
 347 #endif
 348
 349         /*
 350          * Need to register Asp & Wax before the EISA adapters for the IRQ
 351          * regions.  EISA must come before PCI to be sure it gets IRQ region
 352          * 0.
 353          */
 354 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 355         gsc_init();
 356 #endif
 357 #ifdef CONFIG_EISA
 358         eisa_init();
 359 #endif
 360
 361 #if defined(CONFIG_HPPB)
 362         hppb_init();
 363 #endif
 364
 365 #if defined(CONFIG_GSC_DINO)
 366         dino_init();
 367 #endif
 368
 369 #ifdef CONFIG_CHASSIS_LCD_LED
 370         register_led_regions(); /* register LED port info in procfs */
 371 #endif
 372
 373         return 0;
 374 }
 375 arch_initcall(parisc_init);
 376
 377 void start_parisc(void)
 378 {
 379         extern void start_kernel(void);
 380
 381         int ret, cpunum;
 382         struct pdc_coproc_cfg coproc_cfg;
 383
 384         cpunum = smp_processor_id();
 385
 386         set_firmware_width_unlocked();
 387
 388         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 389         if (ret >= 0 && coproc_cfg.ccr_functional) {
 390                 mtctl(coproc_cfg.ccr_functional, 10);
 391
 392                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 393                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 394
 395                 asm volatile ("fstd     %fr0,8(%sp)");
 396         } else {
 397                 panic("must have an fpu to boot linux");
 398         }
 399
 400         start_kernel();
 401         // not reached
 402 }