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