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/sections.h>
  42 #include <asm/pdc.h>
  43 #include <asm/led.h>
  44 #include <asm/machdep.h>        /* for pa7300lc_init() proto */
  45 #include <asm/pdc_chassis.h>
  46 #include <asm/io.h>
  47 #include <asm/setup.h>
  48 #include <asm/unwind.h>
  49
  50 static char __initdata command_line[COMMAND_LINE_SIZE];
  51
  52 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
  53 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
  54 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
  55 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
  56
  57 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
  58 int parisc_bus_is_phys __read_mostly = 1;       /* Assume no IOMMU is present */
  59 EXPORT_SYMBOL(parisc_bus_is_phys);
  60 #endif
  61
  62 void __init setup_cmdline(char **cmdline_p)
  63 {
  64         extern unsigned int boot_args[];
  65
  66         /* Collect stuff passed in from the boot loader */
  67
  68         /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
  69         if (boot_args[0] < 64) {
  70                 /* called from hpux boot loader */
  71                 boot_command_line[0] = '\0';
  72         } else {
  73                 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
  74                         COMMAND_LINE_SIZE);
  75
  76 #ifdef CONFIG_BLK_DEV_INITRD
  77                 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
  78                 {
  79                     initrd_start = (unsigned long)__va(boot_args[2]);
  80                     initrd_end = (unsigned long)__va(boot_args[3]);
  81                 }
  82 #endif
  83         }
  84
  85         strcpy(command_line, boot_command_line);
  86         *cmdline_p = command_line;
  87 }
  88
  89 #ifdef CONFIG_PA11
  90 void __init dma_ops_init(void)
  91 {
  92         switch (boot_cpu_data.cpu_type) {
  93         case pcx:
  94                 /*
  95                  * We've got way too many dependencies on 1.1 semantics
  96                  * to support 1.0 boxes at this point.
  97                  */
  98                 panic(  "PA-RISC Linux currently only supports machines that conform to\n"
  99                         "the PA-RISC 1.1 or 2.0 architecture specification.\n");
 100
 101         case pcxs:
 102         case pcxt:
 103                 hppa_dma_ops = &pcx_dma_ops;
 104                 break;
 105         case pcxl2:
 106                 pa7300lc_init();
 107         case pcxl: /* falls through */
 108                 hppa_dma_ops = &pcxl_dma_ops;
 109                 break;
 110         default:
 111                 break;
 112         }
 113 }
 114 #endif
 115
 116 extern int init_per_cpu(int cpuid);
 117 extern void collect_boot_cpu_data(void);
 118
 119 void __init setup_arch(char **cmdline_p)
 120 {
 121 #ifdef CONFIG_64BIT
 122         extern int parisc_narrow_firmware;
 123 #endif
 124         unwind_init();
 125
 126         init_per_cpu(smp_processor_id());       /* Set Modes & Enable FP */
 127
 128 #ifdef CONFIG_64BIT
 129         printk(KERN_INFO "The 64-bit Kernel has started...\n");
 130 #else
 131         printk(KERN_INFO "The 32-bit Kernel has started...\n");
 132 #endif
 133
 134         printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
 135                 (int)(PAGE_SIZE / 1024));
 136 #ifdef CONFIG_HUGETLB_PAGE
 137         printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
 138                  1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
 139 #else
 140         printk(KERN_CONT "disabled");
 141 #endif
 142         printk(KERN_CONT ".\n");
 143
 144         /*
 145          * Check if initial kernel page mappings are sufficient.
 146          * panic early if not, else we may access kernel functions
 147          * and variables which can't be reached.
 148          */
 149         if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
 150                 panic("KERNEL_INITIAL_ORDER too small!");
 151
 152         pdc_console_init();
 153
 154 #ifdef CONFIG_64BIT
 155         if(parisc_narrow_firmware) {
 156                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 157         }
 158 #endif
 159         setup_pdc();
 160         setup_cmdline(cmdline_p);
 161         collect_boot_cpu_data();
 162         do_memory_inventory();  /* probe for physical memory */
 163         parisc_cache_init();
 164         paging_init();
 165
 166 #ifdef CONFIG_CHASSIS_LCD_LED
 167         /* initialize the LCD/LED after boot_cpu_data is available ! */
 168         led_init();             /* LCD/LED initialization */
 169 #endif
 170
 171 #ifdef CONFIG_PA11
 172         dma_ops_init();
 173 #endif
 174
 175 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 176         conswitchp = &dummy_con;        /* we use do_take_over_console() later ! */
 177 #endif
 178
 179 }
 180
 181 /*
 182  * Display CPU info for all CPUs.
 183  * for parisc this is in processor.c
 184  */
 185 extern int show_cpuinfo (struct seq_file *m, void *v);
 186
 187 static void *
 188 c_start (struct seq_file *m, loff_t *pos)
 189 {
 190         /* Looks like the caller will call repeatedly until we return
 191          * 0, signaling EOF perhaps.  This could be used to sequence
 192          * through CPUs for example.  Since we print all cpu info in our
 193          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 194          * we only allow for one "position".  */
 195         return ((long)*pos < 1) ? (void *)1 : NULL;
 196 }
 197
 198 static void *
 199 c_next (struct seq_file *m, void *v, loff_t *pos)
 200 {
 201         ++*pos;
 202         return c_start(m, pos);
 203 }
 204
 205 static void
 206 c_stop (struct seq_file *m, void *v)
 207 {
 208 }
 209
 210 const struct seq_operations cpuinfo_op = {
 211         .start  = c_start,
 212         .next   = c_next,
 213         .stop   = c_stop,
 214         .show   = show_cpuinfo
 215 };
 216
 217 static void __init parisc_proc_mkdir(void)
 218 {
 219         /*
 220         ** Can't call proc_mkdir() until after proc_root_init() has been
 221         ** called by start_kernel(). In other words, this code can't
 222         ** live in arch/.../setup.c because start_parisc() calls
 223         ** start_kernel().
 224         */
 225         switch (boot_cpu_data.cpu_type) {
 226         case pcxl:
 227         case pcxl2:
 228                 if (NULL == proc_gsc_root)
 229                 {
 230                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 231                 }
 232                 break;
 233         case pcxt_:
 234         case pcxu:
 235         case pcxu_:
 236         case pcxw:
 237         case pcxw_:
 238         case pcxw2:
 239                 if (NULL == proc_runway_root)
 240                 {
 241                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 242                 }
 243                 break;
 244         case mako:
 245         case mako2:
 246                 if (NULL == proc_mckinley_root)
 247                 {
 248                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 249                 }
 250                 break;
 251         default:
 252                 /* FIXME: this was added to prevent the compiler
 253                  * complaining about missing pcx, pcxs and pcxt
 254                  * I'm assuming they have neither gsc nor runway */
 255                 break;
 256         }
 257 }
 258
 259 static struct resource central_bus = {
 260         .name   = "Central Bus",
 261         .start  = F_EXTEND(0xfff80000),
 262         .end    = F_EXTEND(0xfffaffff),
 263         .flags  = IORESOURCE_MEM,
 264 };
 265
 266 static struct resource local_broadcast = {
 267         .name   = "Local Broadcast",
 268         .start  = F_EXTEND(0xfffb0000),
 269         .end    = F_EXTEND(0xfffdffff),
 270         .flags  = IORESOURCE_MEM,
 271 };
 272
 273 static struct resource global_broadcast = {
 274         .name   = "Global Broadcast",
 275         .start  = F_EXTEND(0xfffe0000),
 276         .end    = F_EXTEND(0xffffffff),
 277         .flags  = IORESOURCE_MEM,
 278 };
 279
 280 static int __init parisc_init_resources(void)
 281 {
 282         int result;
 283
 284         result = request_resource(&iomem_resource, &central_bus);
 285         if (result < 0) {
 286                 printk(KERN_ERR
 287                        "%s: failed to claim %s address space!\n",
 288                        __FILE__, central_bus.name);
 289                 return result;
 290         }
 291
 292         result = request_resource(&iomem_resource, &local_broadcast);
 293         if (result < 0) {
 294                 printk(KERN_ERR
 295                        "%s: failed to claim %saddress space!\n",
 296                        __FILE__, local_broadcast.name);
 297                 return result;
 298         }
 299
 300         result = request_resource(&iomem_resource, &global_broadcast);
 301         if (result < 0) {
 302                 printk(KERN_ERR
 303                        "%s: failed to claim %s address space!\n",
 304                        __FILE__, global_broadcast.name);
 305                 return result;
 306         }
 307
 308         return 0;
 309 }
 310
 311 extern void gsc_init(void);
 312 extern void processor_init(void);
 313 extern void ccio_init(void);
 314 extern void hppb_init(void);
 315 extern void dino_init(void);
 316 extern void iosapic_init(void);
 317 extern void lba_init(void);
 318 extern void sba_init(void);
 319 extern void eisa_init(void);
 320
 321 static int __init parisc_init(void)
 322 {
 323         u32 osid = (OS_ID_LINUX << 16);
 324
 325         parisc_proc_mkdir();
 326         parisc_init_resources();
 327         do_device_inventory();                  /* probe for hardware */
 328
 329         parisc_pdc_chassis_init();
 330
 331         /* set up a new led state on systems shipped LED State panel */
 332         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 333
 334         /* tell PDC we're Linux. Nevermind failure. */
 335         pdc_stable_write(0x40, &osid, sizeof(osid));
 336
 337         /* start with known state */
 338         flush_cache_all_local();
 339         flush_tlb_all_local(NULL);
 340
 341         processor_init();
 342 #ifdef CONFIG_SMP
 343         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 344                 num_online_cpus(), num_present_cpus(),
 345 #else
 346         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 347 #endif
 348                         boot_cpu_data.cpu_name,
 349                         boot_cpu_data.cpu_hz / 1000000,
 350                         boot_cpu_data.cpu_hz % 1000000  );
 351
 352         parisc_setup_cache_timing();
 353
 354         /* These are in a non-obvious order, will fix when we have an iotree */
 355 #if defined(CONFIG_IOSAPIC)
 356         iosapic_init();
 357 #endif
 358 #if defined(CONFIG_IOMMU_SBA)
 359         sba_init();
 360 #endif
 361 #if defined(CONFIG_PCI_LBA)
 362         lba_init();
 363 #endif
 364
 365         /* CCIO before any potential subdevices */
 366 #if defined(CONFIG_IOMMU_CCIO)
 367         ccio_init();
 368 #endif
 369
 370         /*
 371          * Need to register Asp & Wax before the EISA adapters for the IRQ
 372          * regions.  EISA must come before PCI to be sure it gets IRQ region
 373          * 0.
 374          */
 375 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 376         gsc_init();
 377 #endif
 378 #ifdef CONFIG_EISA
 379         eisa_init();
 380 #endif
 381
 382 #if defined(CONFIG_HPPB)
 383         hppb_init();
 384 #endif
 385
 386 #if defined(CONFIG_GSC_DINO)
 387         dino_init();
 388 #endif
 389
 390 #ifdef CONFIG_CHASSIS_LCD_LED
 391         register_led_regions(); /* register LED port info in procfs */
 392 #endif
 393
 394         return 0;
 395 }
 396 arch_initcall(parisc_init);
 397
 398 void start_parisc(void)
 399 {
 400         extern void start_kernel(void);
 401         extern void early_trap_init(void);
 402
 403         int ret, cpunum;
 404         struct pdc_coproc_cfg coproc_cfg;
 405
 406         cpunum = smp_processor_id();
 407
 408         set_firmware_width_unlocked();
 409
 410         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 411         if (ret >= 0 && coproc_cfg.ccr_functional) {
 412                 mtctl(coproc_cfg.ccr_functional, 10);
 413
 414                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 415                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 416
 417                 asm volatile ("fstd     %fr0,8(%sp)");
 418         } else {
 419                 panic("must have an fpu to boot linux");
 420         }
 421
 422         early_trap_init(); /* initialize checksum of fault_vector */
 423
 424         start_kernel();
 425         // not reached
 426 }