arch/parisc/kernel/setup.c

   1 /*    $Id: setup.c,v 1.8 2000/02/02 04:42:38 prumpf Exp $
   2  *
   3  *    Initial setup-routines for HP 9000 based hardware.
   4  *
   5  *    Copyright (C) 1991, 1992, 1995  Linus Torvalds
   6  *    Modifications for PA-RISC (C) 1999 Helge Deller <deller@gmx.de>
   7  *    Modifications copyright 1999 SuSE GmbH (Philipp Rumpf)
   8  *    Modifications copyright 2000 Martin K. Petersen <mkp@mkp.net>
   9  *    Modifications copyright 2000 Philipp Rumpf <prumpf@tux.org>
  10  *    Modifications copyright 2001 Ryan Bradetich <rbradetich@uswest.net>
  11  *
  12  *    Initial PA-RISC Version: 04-23-1999 by Helge Deller
  13  *
  14  *    This program is free software; you can redistribute it and/or modify
  15  *    it under the terms of the GNU General Public License as published by
  16  *    the Free Software Foundation; either version 2, or (at your option)
  17  *    any later version.
  18  *
  19  *    This program is distributed in the hope that it will be useful,
  20  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *    GNU General Public License for more details.
  23  *
  24  *    You should have received a copy of the GNU General Public License
  25  *    along with this program; if not, write to the Free Software
  26  *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27  *
  28  */
  29
  30 #include <linux/kernel.h>
  31 #include <linux/initrd.h>
  32 #include <linux/init.h>
  33 #include <linux/console.h>
  34 #include <linux/seq_file.h>
  35 #define PCI_DEBUG
  36 #include <linux/pci.h>
  37 #undef PCI_DEBUG
  38 #include <linux/proc_fs.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
  48 char    command_line[COMMAND_LINE_SIZE] __read_mostly;
  49
  50 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
  51 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
  52 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
  53 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
  54
  55 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
  56 int parisc_bus_is_phys __read_mostly = 1;       /* Assume no IOMMU is present */
  57 EXPORT_SYMBOL(parisc_bus_is_phys);
  58 #endif
  59
  60 /* This sets the vmerge boundary and size, it's here because it has to
  61  * be available on all platforms (zero means no-virtual merging) */
  62 unsigned long parisc_vmerge_boundary = 0;
  63 unsigned long parisc_vmerge_max_size = 0;
  64
  65 void __init setup_cmdline(char **cmdline_p)
  66 {
  67         extern unsigned int boot_args[];
  68
  69         /* Collect stuff passed in from the boot loader */
  70
  71         /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
  72         if (boot_args[0] < 64) {
  73                 /* called from hpux boot loader */
  74                 saved_command_line[0] = '\0';
  75         } else {
  76                 strcpy(saved_command_line, (char *)__va(boot_args[1]));
  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, saved_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 __LP64__
 124         extern int parisc_narrow_firmware;
 125 #endif
 126
 127         init_per_cpu(smp_processor_id());       /* Set Modes & Enable FP */
 128
 129 #ifdef __LP64__
 130         printk(KERN_INFO "The 64-bit Kernel has started...\n");
 131 #else
 132         printk(KERN_INFO "The 32-bit Kernel has started...\n");
 133 #endif
 134
 135         pdc_console_init();
 136
 137 #ifdef __LP64__
 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 take_over_console() later ! */
 160 #endif
 161
 162 }
 163
 164 /*
 165  * Display cpu info for all cpu's.
 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 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                 if (NULL == proc_mckinley_root)
 229                 {
 230                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 231                 }
 232                 break;
 233         default:
 234                 /* FIXME: this was added to prevent the compiler
 235                  * complaining about missing pcx, pcxs and pcxt
 236                  * I'm assuming they have neither gsc nor runway */
 237                 break;
 238         }
 239 }
 240
 241 static struct resource central_bus = {
 242         .name   = "Central Bus",
 243         .start  = F_EXTEND(0xfff80000),
 244         .end    = F_EXTEND(0xfffaffff),
 245         .flags  = IORESOURCE_MEM,
 246 };
 247
 248 static struct resource local_broadcast = {
 249         .name   = "Local Broadcast",
 250         .start  = F_EXTEND(0xfffb0000),
 251         .end    = F_EXTEND(0xfffdffff),
 252         .flags  = IORESOURCE_MEM,
 253 };
 254
 255 static struct resource global_broadcast = {
 256         .name   = "Global Broadcast",
 257         .start  = F_EXTEND(0xfffe0000),
 258         .end    = F_EXTEND(0xffffffff),
 259         .flags  = IORESOURCE_MEM,
 260 };
 261
 262 static int __init parisc_init_resources(void)
 263 {
 264         int result;
 265
 266         result = request_resource(&iomem_resource, &central_bus);
 267         if (result < 0) {
 268                 printk(KERN_ERR
 269                        "%s: failed to claim %s address space!\n",
 270                        __FILE__, central_bus.name);
 271                 return result;
 272         }
 273
 274         result = request_resource(&iomem_resource, &local_broadcast);
 275         if (result < 0) {
 276                 printk(KERN_ERR
 277                        "%s: failed to claim %saddress space!\n",
 278                        __FILE__, local_broadcast.name);
 279                 return result;
 280         }
 281
 282         result = request_resource(&iomem_resource, &global_broadcast);
 283         if (result < 0) {
 284                 printk(KERN_ERR
 285                        "%s: failed to claim %s address space!\n",
 286                        __FILE__, global_broadcast.name);
 287                 return result;
 288         }
 289
 290         return 0;
 291 }
 292
 293 extern void gsc_init(void);
 294 extern void processor_init(void);
 295 extern void ccio_init(void);
 296 extern void hppb_init(void);
 297 extern void dino_init(void);
 298 extern void iosapic_init(void);
 299 extern void lba_init(void);
 300 extern void sba_init(void);
 301 extern void eisa_init(void);
 302
 303 static int __init parisc_init(void)
 304 {
 305         u32 osid = (OS_ID_LINUX << 16);
 306
 307         parisc_proc_mkdir();
 308         parisc_init_resources();
 309         do_device_inventory();                  /* probe for hardware */
 310
 311         parisc_pdc_chassis_init();
 312
 313         /* set up a new led state on systems shipped LED State panel */
 314         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 315
 316         /* tell PDC we're Linux. Nevermind failure. */
 317         pdc_stable_write(0x40, &osid, sizeof(osid));
 318
 319         processor_init();
 320         printk(KERN_INFO "CPU(s): %d x %s at %d.%06d MHz\n",
 321                         boot_cpu_data.cpu_count,
 322                         boot_cpu_data.cpu_name,
 323                         boot_cpu_data.cpu_hz / 1000000,
 324                         boot_cpu_data.cpu_hz % 1000000  );
 325
 326         parisc_setup_cache_timing();
 327
 328         /* These are in a non-obvious order, will fix when we have an iotree */
 329 #if defined(CONFIG_IOSAPIC)
 330         iosapic_init();
 331 #endif
 332 #if defined(CONFIG_IOMMU_SBA)
 333         sba_init();
 334 #endif
 335 #if defined(CONFIG_PCI_LBA)
 336         lba_init();
 337 #endif
 338
 339         /* CCIO before any potential subdevices */
 340 #if defined(CONFIG_IOMMU_CCIO)
 341         ccio_init();
 342 #endif
 343
 344         /*
 345          * Need to register Asp & Wax before the EISA adapters for the IRQ
 346          * regions.  EISA must come before PCI to be sure it gets IRQ region
 347          * 0.
 348          */
 349 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 350         gsc_init();
 351 #endif
 352 #ifdef CONFIG_EISA
 353         eisa_init();
 354 #endif
 355
 356 #if defined(CONFIG_HPPB)
 357         hppb_init();
 358 #endif
 359
 360 #if defined(CONFIG_GSC_DINO)
 361         dino_init();
 362 #endif
 363
 364 #ifdef CONFIG_CHASSIS_LCD_LED
 365         register_led_regions(); /* register LED port info in procfs */
 366 #endif
 367
 368         return 0;
 369 }
 370
 371 arch_initcall(parisc_init);
 372