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