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         printk(KERN_INFO "Default page size is %dKB.\n", (int)(PAGE_SIZE / 1024));
 133
 134         pdc_console_init();
 135
 136 #ifdef CONFIG_64BIT
 137         if(parisc_narrow_firmware) {
 138                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 139         }
 140 #endif
 141         setup_pdc();
 142         setup_cmdline(cmdline_p);
 143         collect_boot_cpu_data();
 144         do_memory_inventory();  /* probe for physical memory */
 145         parisc_cache_init();
 146         paging_init();
 147
 148 #ifdef CONFIG_CHASSIS_LCD_LED
 149         /* initialize the LCD/LED after boot_cpu_data is available ! */
 150         led_init();             /* LCD/LED initialization */
 151 #endif
 152
 153 #ifdef CONFIG_PA11
 154         dma_ops_init();
 155 #endif
 156
 157 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 158         conswitchp = &dummy_con;        /* we use take_over_console() later ! */
 159 #endif
 160
 161 }
 162
 163 /*
 164  * Display CPU info for all CPUs.
 165  * for parisc this is in processor.c
 166  */
 167 extern int show_cpuinfo (struct seq_file *m, void *v);
 168
 169 static void *
 170 c_start (struct seq_file *m, loff_t *pos)
 171 {
 172         /* Looks like the caller will call repeatedly until we return
 173          * 0, signaling EOF perhaps.  This could be used to sequence
 174          * through CPUs for example.  Since we print all cpu info in our
 175          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 176          * we only allow for one "position".  */
 177         return ((long)*pos < 1) ? (void *)1 : NULL;
 178 }
 179
 180 static void *
 181 c_next (struct seq_file *m, void *v, loff_t *pos)
 182 {
 183         ++*pos;
 184         return c_start(m, pos);
 185 }
 186
 187 static void
 188 c_stop (struct seq_file *m, void *v)
 189 {
 190 }
 191
 192 const struct seq_operations cpuinfo_op = {
 193         .start  = c_start,
 194         .next   = c_next,
 195         .stop   = c_stop,
 196         .show   = show_cpuinfo
 197 };
 198
 199 static void __init parisc_proc_mkdir(void)
 200 {
 201         /*
 202         ** Can't call proc_mkdir() until after proc_root_init() has been
 203         ** called by start_kernel(). In other words, this code can't
 204         ** live in arch/.../setup.c because start_parisc() calls
 205         ** start_kernel().
 206         */
 207         switch (boot_cpu_data.cpu_type) {
 208         case pcxl:
 209         case pcxl2:
 210                 if (NULL == proc_gsc_root)
 211                 {
 212                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 213                 }
 214                 break;
 215         case pcxt_:
 216         case pcxu:
 217         case pcxu_:
 218         case pcxw:
 219         case pcxw_:
 220         case pcxw2:
 221                 if (NULL == proc_runway_root)
 222                 {
 223                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 224                 }
 225                 break;
 226         case mako:
 227         case mako2:
 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                         num_present_cpus(),
 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 arch_initcall(parisc_init);
 371
 372 void start_parisc(void)
 373 {
 374         extern void start_kernel(void);
 375
 376         int ret, cpunum;
 377         struct pdc_coproc_cfg coproc_cfg;
 378
 379         cpunum = smp_processor_id();
 380
 381         set_firmware_width_unlocked();
 382
 383         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 384         if (ret >= 0 && coproc_cfg.ccr_functional) {
 385                 mtctl(coproc_cfg.ccr_functional, 10);
 386
 387                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 388                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 389
 390                 asm volatile ("fstd     %fr0,8(%sp)");
 391         } else {
 392                 panic("must have an fpu to boot linux");
 393         }
 394
 395         start_kernel();
 396         // not reached
 397 }