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 #include <linux/sched.h>
  40
  41 #include <asm/processor.h>
  42 #include <asm/sections.h>
  43 #include <asm/pdc.h>
  44 #include <asm/led.h>
  45 #include <asm/machdep.h>        /* for pa7300lc_init() proto */
  46 #include <asm/pdc_chassis.h>
  47 #include <asm/io.h>
  48 #include <asm/setup.h>
  49 #include <asm/unwind.h>
  50
  51 static char __initdata command_line[COMMAND_LINE_SIZE];
  52
  53 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
  54 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
  55 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
  56 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
  57
  58 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
  59 int parisc_bus_is_phys __read_mostly = 1;       /* Assume no IOMMU is present */
  60 EXPORT_SYMBOL(parisc_bus_is_phys);
  61 #endif
  62
  63 void __init setup_cmdline(char **cmdline_p)
  64 {
  65         extern unsigned int boot_args[];
  66
  67         /* Collect stuff passed in from the boot loader */
  68
  69         /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
  70         if (boot_args[0] < 64) {
  71                 /* called from hpux boot loader */
  72                 boot_command_line[0] = '\0';
  73         } else {
  74                 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
  75                         COMMAND_LINE_SIZE);
  76
  77 #ifdef CONFIG_BLK_DEV_INITRD
  78                 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
  79                 {
  80                     initrd_start = (unsigned long)__va(boot_args[2]);
  81                     initrd_end = (unsigned long)__va(boot_args[3]);
  82                 }
  83 #endif
  84         }
  85
  86         strcpy(command_line, boot_command_line);
  87         *cmdline_p = command_line;
  88 }
  89
  90 #ifdef CONFIG_PA11
  91 void __init dma_ops_init(void)
  92 {
  93         switch (boot_cpu_data.cpu_type) {
  94         case pcx:
  95                 /*
  96                  * We've got way too many dependencies on 1.1 semantics
  97                  * to support 1.0 boxes at this point.
  98                  */
  99                 panic(  "PA-RISC Linux currently only supports machines that conform to\n"
 100                         "the PA-RISC 1.1 or 2.0 architecture specification.\n");
 101
 102         case pcxs:
 103         case pcxt:
 104                 hppa_dma_ops = &pcx_dma_ops;
 105                 break;
 106         case pcxl2:
 107                 pa7300lc_init();
 108         case pcxl: /* falls through */
 109                 hppa_dma_ops = &pcxl_dma_ops;
 110                 break;
 111         default:
 112                 break;
 113         }
 114 }
 115 #endif
 116
 117 extern int init_per_cpu(int cpuid);
 118 extern void collect_boot_cpu_data(void);
 119
 120 void __init setup_arch(char **cmdline_p)
 121 {
 122 #ifdef CONFIG_64BIT
 123         extern int parisc_narrow_firmware;
 124 #endif
 125         unwind_init();
 126
 127         init_per_cpu(smp_processor_id());       /* Set Modes & Enable FP */
 128
 129 #ifdef CONFIG_64BIT
 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         printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
 136                 (int)(PAGE_SIZE / 1024));
 137 #ifdef CONFIG_HUGETLB_PAGE
 138         printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
 139                  1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
 140 #else
 141         printk(KERN_CONT "disabled");
 142 #endif
 143         printk(KERN_CONT ".\n");
 144
 145         /*
 146          * Check if initial kernel page mappings are sufficient.
 147          * panic early if not, else we may access kernel functions
 148          * and variables which can't be reached.
 149          */
 150         if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
 151                 panic("KERNEL_INITIAL_ORDER too small!");
 152
 153         pdc_console_init();
 154
 155 #ifdef CONFIG_64BIT
 156         if(parisc_narrow_firmware) {
 157                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 158         }
 159 #endif
 160         setup_pdc();
 161         setup_cmdline(cmdline_p);
 162         collect_boot_cpu_data();
 163         do_memory_inventory();  /* probe for physical memory */
 164         parisc_cache_init();
 165         paging_init();
 166
 167 #ifdef CONFIG_CHASSIS_LCD_LED
 168         /* initialize the LCD/LED after boot_cpu_data is available ! */
 169         led_init();             /* LCD/LED initialization */
 170 #endif
 171
 172 #ifdef CONFIG_PA11
 173         dma_ops_init();
 174 #endif
 175
 176 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 177         conswitchp = &dummy_con;        /* we use do_take_over_console() later ! */
 178 #endif
 179
 180         clear_sched_clock_stable();
 181 }
 182
 183 /*
 184  * Display CPU info for all CPUs.
 185  * for parisc this is in processor.c
 186  */
 187 extern int show_cpuinfo (struct seq_file *m, void *v);
 188
 189 static void *
 190 c_start (struct seq_file *m, loff_t *pos)
 191 {
 192         /* Looks like the caller will call repeatedly until we return
 193          * 0, signaling EOF perhaps.  This could be used to sequence
 194          * through CPUs for example.  Since we print all cpu info in our
 195          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 196          * we only allow for one "position".  */
 197         return ((long)*pos < 1) ? (void *)1 : NULL;
 198 }
 199
 200 static void *
 201 c_next (struct seq_file *m, void *v, loff_t *pos)
 202 {
 203         ++*pos;
 204         return c_start(m, pos);
 205 }
 206
 207 static void
 208 c_stop (struct seq_file *m, void *v)
 209 {
 210 }
 211
 212 const struct seq_operations cpuinfo_op = {
 213         .start  = c_start,
 214         .next   = c_next,
 215         .stop   = c_stop,
 216         .show   = show_cpuinfo
 217 };
 218
 219 static void __init parisc_proc_mkdir(void)
 220 {
 221         /*
 222         ** Can't call proc_mkdir() until after proc_root_init() has been
 223         ** called by start_kernel(). In other words, this code can't
 224         ** live in arch/.../setup.c because start_parisc() calls
 225         ** start_kernel().
 226         */
 227         switch (boot_cpu_data.cpu_type) {
 228         case pcxl:
 229         case pcxl2:
 230                 if (NULL == proc_gsc_root)
 231                 {
 232                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 233                 }
 234                 break;
 235         case pcxt_:
 236         case pcxu:
 237         case pcxu_:
 238         case pcxw:
 239         case pcxw_:
 240         case pcxw2:
 241                 if (NULL == proc_runway_root)
 242                 {
 243                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 244                 }
 245                 break;
 246         case mako:
 247         case mako2:
 248                 if (NULL == proc_mckinley_root)
 249                 {
 250                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 251                 }
 252                 break;
 253         default:
 254                 /* FIXME: this was added to prevent the compiler
 255                  * complaining about missing pcx, pcxs and pcxt
 256                  * I'm assuming they have neither gsc nor runway */
 257                 break;
 258         }
 259 }
 260
 261 static struct resource central_bus = {
 262         .name   = "Central Bus",
 263         .start  = F_EXTEND(0xfff80000),
 264         .end    = F_EXTEND(0xfffaffff),
 265         .flags  = IORESOURCE_MEM,
 266 };
 267
 268 static struct resource local_broadcast = {
 269         .name   = "Local Broadcast",
 270         .start  = F_EXTEND(0xfffb0000),
 271         .end    = F_EXTEND(0xfffdffff),
 272         .flags  = IORESOURCE_MEM,
 273 };
 274
 275 static struct resource global_broadcast = {
 276         .name   = "Global Broadcast",
 277         .start  = F_EXTEND(0xfffe0000),
 278         .end    = F_EXTEND(0xffffffff),
 279         .flags  = IORESOURCE_MEM,
 280 };
 281
 282 static int __init parisc_init_resources(void)
 283 {
 284         int result;
 285
 286         result = request_resource(&iomem_resource, &central_bus);
 287         if (result < 0) {
 288                 printk(KERN_ERR
 289                        "%s: failed to claim %s address space!\n",
 290                        __FILE__, central_bus.name);
 291                 return result;
 292         }
 293
 294         result = request_resource(&iomem_resource, &local_broadcast);
 295         if (result < 0) {
 296                 printk(KERN_ERR
 297                        "%s: failed to claim %saddress space!\n",
 298                        __FILE__, local_broadcast.name);
 299                 return result;
 300         }
 301
 302         result = request_resource(&iomem_resource, &global_broadcast);
 303         if (result < 0) {
 304                 printk(KERN_ERR
 305                        "%s: failed to claim %s address space!\n",
 306                        __FILE__, global_broadcast.name);
 307                 return result;
 308         }
 309
 310         return 0;
 311 }
 312
 313 extern void gsc_init(void);
 314 extern void processor_init(void);
 315 extern void ccio_init(void);
 316 extern void hppb_init(void);
 317 extern void dino_init(void);
 318 extern void iosapic_init(void);
 319 extern void lba_init(void);
 320 extern void sba_init(void);
 321 extern void eisa_init(void);
 322
 323 static int __init parisc_init(void)
 324 {
 325         u32 osid = (OS_ID_LINUX << 16);
 326
 327         parisc_proc_mkdir();
 328         parisc_init_resources();
 329         do_device_inventory();                  /* probe for hardware */
 330
 331         parisc_pdc_chassis_init();
 332
 333         /* set up a new led state on systems shipped LED State panel */
 334         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 335
 336         /* tell PDC we're Linux. Nevermind failure. */
 337         pdc_stable_write(0x40, &osid, sizeof(osid));
 338
 339         /* start with known state */
 340         flush_cache_all_local();
 341         flush_tlb_all_local(NULL);
 342
 343         processor_init();
 344 #ifdef CONFIG_SMP
 345         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 346                 num_online_cpus(), num_present_cpus(),
 347 #else
 348         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 349 #endif
 350                         boot_cpu_data.cpu_name,
 351                         boot_cpu_data.cpu_hz / 1000000,
 352                         boot_cpu_data.cpu_hz % 1000000  );
 353
 354         parisc_setup_cache_timing();
 355
 356         /* These are in a non-obvious order, will fix when we have an iotree */
 357 #if defined(CONFIG_IOSAPIC)
 358         iosapic_init();
 359 #endif
 360 #if defined(CONFIG_IOMMU_SBA)
 361         sba_init();
 362 #endif
 363 #if defined(CONFIG_PCI_LBA)
 364         lba_init();
 365 #endif
 366
 367         /* CCIO before any potential subdevices */
 368 #if defined(CONFIG_IOMMU_CCIO)
 369         ccio_init();
 370 #endif
 371
 372         /*
 373          * Need to register Asp & Wax before the EISA adapters for the IRQ
 374          * regions.  EISA must come before PCI to be sure it gets IRQ region
 375          * 0.
 376          */
 377 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 378         gsc_init();
 379 #endif
 380 #ifdef CONFIG_EISA
 381         eisa_init();
 382 #endif
 383
 384 #if defined(CONFIG_HPPB)
 385         hppb_init();
 386 #endif
 387
 388 #if defined(CONFIG_GSC_DINO)
 389         dino_init();
 390 #endif
 391
 392 #ifdef CONFIG_CHASSIS_LCD_LED
 393         register_led_regions(); /* register LED port info in procfs */
 394 #endif
 395
 396         return 0;
 397 }
 398 arch_initcall(parisc_init);
 399
 400 void start_parisc(void)
 401 {
 402         extern void start_kernel(void);
 403         extern void early_trap_init(void);
 404
 405         int ret, cpunum;
 406         struct pdc_coproc_cfg coproc_cfg;
 407
 408         cpunum = smp_processor_id();
 409
 410         set_firmware_width_unlocked();
 411
 412         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 413         if (ret >= 0 && coproc_cfg.ccr_functional) {
 414                 mtctl(coproc_cfg.ccr_functional, 10);
 415
 416                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 417                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 418
 419                 asm volatile ("fstd     %fr0,8(%sp)");
 420         } else {
 421                 panic("must have an fpu to boot linux");
 422         }
 423
 424         early_trap_init(); /* initialize checksum of fault_vector */
 425
 426         start_kernel();
 427         // not reached
 428 }