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 #include <linux/sched/clock.h>
  41 #include <linux/start_kernel.h>
  42
  43 #include <asm/processor.h>
  44 #include <asm/sections.h>
  45 #include <asm/pdc.h>
  46 #include <asm/led.h>
  47 #include <asm/machdep.h>        /* for pa7300lc_init() proto */
  48 #include <asm/pdc_chassis.h>
  49 #include <asm/io.h>
  50 #include <asm/setup.h>
  51 #include <asm/unwind.h>
  52 #include <asm/smp.h>
  53
  54 static char __initdata command_line[COMMAND_LINE_SIZE];
  55
  56 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
  57 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
  58 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
  59 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
  60
  61 #if !defined(CONFIG_PA20) && (defined(CONFIG_IOMMU_CCIO) || defined(CONFIG_IOMMU_SBA))
  62 int parisc_bus_is_phys __read_mostly = 1;       /* Assume no IOMMU is present */
  63 EXPORT_SYMBOL(parisc_bus_is_phys);
  64 #endif
  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                 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
  78                         COMMAND_LINE_SIZE);
  79
  80 #ifdef CONFIG_BLK_DEV_INITRD
  81                 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
  82                 {
  83                     initrd_start = (unsigned long)__va(boot_args[2]);
  84                     initrd_end = (unsigned long)__va(boot_args[3]);
  85                 }
  86 #endif
  87         }
  88
  89         strcpy(command_line, boot_command_line);
  90         *cmdline_p = command_line;
  91 }
  92
  93 #ifdef CONFIG_PA11
  94 void __init dma_ops_init(void)
  95 {
  96         switch (boot_cpu_data.cpu_type) {
  97         case pcx:
  98                 /*
  99                  * We've got way too many dependencies on 1.1 semantics
 100                  * to support 1.0 boxes at this point.
 101                  */
 102                 panic(  "PA-RISC Linux currently only supports machines that conform to\n"
 103                         "the PA-RISC 1.1 or 2.0 architecture specification.\n");
 104
 105         case pcxs:
 106         case pcxt:
 107                 hppa_dma_ops = &pcx_dma_ops;
 108                 break;
 109         case pcxl2:
 110                 pa7300lc_init();
 111         case pcxl: /* falls through */
 112                 hppa_dma_ops = &pcxl_dma_ops;
 113                 break;
 114         default:
 115                 break;
 116         }
 117 }
 118 #endif
 119
 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         printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
 138                 (int)(PAGE_SIZE / 1024));
 139 #ifdef CONFIG_HUGETLB_PAGE
 140         printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
 141                  1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
 142 #else
 143         printk(KERN_CONT "disabled");
 144 #endif
 145         printk(KERN_CONT ".\n");
 146
 147         /*
 148          * Check if initial kernel page mappings are sufficient.
 149          * panic early if not, else we may access kernel functions
 150          * and variables which can't be reached.
 151          */
 152         if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
 153                 panic("KERNEL_INITIAL_ORDER too small!");
 154
 155         pdc_console_init();
 156
 157 #ifdef CONFIG_64BIT
 158         if(parisc_narrow_firmware) {
 159                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 160         }
 161 #endif
 162         setup_pdc();
 163         setup_cmdline(cmdline_p);
 164         collect_boot_cpu_data();
 165         do_memory_inventory();  /* probe for physical memory */
 166         parisc_cache_init();
 167         paging_init();
 168
 169 #ifdef CONFIG_CHASSIS_LCD_LED
 170         /* initialize the LCD/LED after boot_cpu_data is available ! */
 171         led_init();             /* LCD/LED initialization */
 172 #endif
 173
 174 #ifdef CONFIG_PA11
 175         dma_ops_init();
 176 #endif
 177
 178 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 179         conswitchp = &dummy_con;        /* we use do_take_over_console() later ! */
 180 #endif
 181
 182         clear_sched_clock_stable();
 183 }
 184
 185 /*
 186  * Display CPU info for all CPUs.
 187  * for parisc this is in processor.c
 188  */
 189 extern int show_cpuinfo (struct seq_file *m, void *v);
 190
 191 static void *
 192 c_start (struct seq_file *m, loff_t *pos)
 193 {
 194         /* Looks like the caller will call repeatedly until we return
 195          * 0, signaling EOF perhaps.  This could be used to sequence
 196          * through CPUs for example.  Since we print all cpu info in our
 197          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 198          * we only allow for one "position".  */
 199         return ((long)*pos < 1) ? (void *)1 : NULL;
 200 }
 201
 202 static void *
 203 c_next (struct seq_file *m, void *v, loff_t *pos)
 204 {
 205         ++*pos;
 206         return c_start(m, pos);
 207 }
 208
 209 static void
 210 c_stop (struct seq_file *m, void *v)
 211 {
 212 }
 213
 214 const struct seq_operations cpuinfo_op = {
 215         .start  = c_start,
 216         .next   = c_next,
 217         .stop   = c_stop,
 218         .show   = show_cpuinfo
 219 };
 220
 221 static void __init parisc_proc_mkdir(void)
 222 {
 223         /*
 224         ** Can't call proc_mkdir() until after proc_root_init() has been
 225         ** called by start_kernel(). In other words, this code can't
 226         ** live in arch/.../setup.c because start_parisc() calls
 227         ** start_kernel().
 228         */
 229         switch (boot_cpu_data.cpu_type) {
 230         case pcxl:
 231         case pcxl2:
 232                 if (NULL == proc_gsc_root)
 233                 {
 234                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 235                 }
 236                 break;
 237         case pcxt_:
 238         case pcxu:
 239         case pcxu_:
 240         case pcxw:
 241         case pcxw_:
 242         case pcxw2:
 243                 if (NULL == proc_runway_root)
 244                 {
 245                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 246                 }
 247                 break;
 248         case mako:
 249         case mako2:
 250                 if (NULL == proc_mckinley_root)
 251                 {
 252                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 253                 }
 254                 break;
 255         default:
 256                 /* FIXME: this was added to prevent the compiler
 257                  * complaining about missing pcx, pcxs and pcxt
 258                  * I'm assuming they have neither gsc nor runway */
 259                 break;
 260         }
 261 }
 262
 263 static struct resource central_bus = {
 264         .name   = "Central Bus",
 265         .start  = F_EXTEND(0xfff80000),
 266         .end    = F_EXTEND(0xfffaffff),
 267         .flags  = IORESOURCE_MEM,
 268 };
 269
 270 static struct resource local_broadcast = {
 271         .name   = "Local Broadcast",
 272         .start  = F_EXTEND(0xfffb0000),
 273         .end    = F_EXTEND(0xfffdffff),
 274         .flags  = IORESOURCE_MEM,
 275 };
 276
 277 static struct resource global_broadcast = {
 278         .name   = "Global Broadcast",
 279         .start  = F_EXTEND(0xfffe0000),
 280         .end    = F_EXTEND(0xffffffff),
 281         .flags  = IORESOURCE_MEM,
 282 };
 283
 284 static int __init parisc_init_resources(void)
 285 {
 286         int result;
 287
 288         result = request_resource(&iomem_resource, &central_bus);
 289         if (result < 0) {
 290                 printk(KERN_ERR
 291                        "%s: failed to claim %s address space!\n",
 292                        __FILE__, central_bus.name);
 293                 return result;
 294         }
 295
 296         result = request_resource(&iomem_resource, &local_broadcast);
 297         if (result < 0) {
 298                 printk(KERN_ERR
 299                        "%s: failed to claim %saddress space!\n",
 300                        __FILE__, local_broadcast.name);
 301                 return result;
 302         }
 303
 304         result = request_resource(&iomem_resource, &global_broadcast);
 305         if (result < 0) {
 306                 printk(KERN_ERR
 307                        "%s: failed to claim %s address space!\n",
 308                        __FILE__, global_broadcast.name);
 309                 return result;
 310         }
 311
 312         return 0;
 313 }
 314
 315 extern void gsc_init(void);
 316 extern void processor_init(void);
 317 extern void ccio_init(void);
 318 extern void hppb_init(void);
 319 extern void dino_init(void);
 320 extern void iosapic_init(void);
 321 extern void lba_init(void);
 322 extern void sba_init(void);
 323 extern void eisa_init(void);
 324
 325 static int __init parisc_init(void)
 326 {
 327         u32 osid = (OS_ID_LINUX << 16);
 328
 329         parisc_proc_mkdir();
 330         parisc_init_resources();
 331         do_device_inventory();                  /* probe for hardware */
 332
 333         parisc_pdc_chassis_init();
 334
 335         /* set up a new led state on systems shipped LED State panel */
 336         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 337
 338         /* tell PDC we're Linux. Nevermind failure. */
 339         pdc_stable_write(0x40, &osid, sizeof(osid));
 340
 341         /* start with known state */
 342         flush_cache_all_local();
 343         flush_tlb_all_local(NULL);
 344
 345         processor_init();
 346 #ifdef CONFIG_SMP
 347         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 348                 num_online_cpus(), num_present_cpus(),
 349 #else
 350         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 351 #endif
 352                         boot_cpu_data.cpu_name,
 353                         boot_cpu_data.cpu_hz / 1000000,
 354                         boot_cpu_data.cpu_hz % 1000000  );
 355
 356         parisc_setup_cache_timing();
 357
 358         /* These are in a non-obvious order, will fix when we have an iotree */
 359 #if defined(CONFIG_IOSAPIC)
 360         iosapic_init();
 361 #endif
 362 #if defined(CONFIG_IOMMU_SBA)
 363         sba_init();
 364 #endif
 365 #if defined(CONFIG_PCI_LBA)
 366         lba_init();
 367 #endif
 368
 369         /* CCIO before any potential subdevices */
 370 #if defined(CONFIG_IOMMU_CCIO)
 371         ccio_init();
 372 #endif
 373
 374         /*
 375          * Need to register Asp & Wax before the EISA adapters for the IRQ
 376          * regions.  EISA must come before PCI to be sure it gets IRQ region
 377          * 0.
 378          */
 379 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 380         gsc_init();
 381 #endif
 382 #ifdef CONFIG_EISA
 383         eisa_init();
 384 #endif
 385
 386 #if defined(CONFIG_HPPB)
 387         hppb_init();
 388 #endif
 389
 390 #if defined(CONFIG_GSC_DINO)
 391         dino_init();
 392 #endif
 393
 394 #ifdef CONFIG_CHASSIS_LCD_LED
 395         register_led_regions(); /* register LED port info in procfs */
 396 #endif
 397
 398         return 0;
 399 }
 400 arch_initcall(parisc_init);
 401
 402 void __init start_parisc(void)
 403 {
 404         extern void early_trap_init(void);
 405
 406         int ret, cpunum;
 407         struct pdc_coproc_cfg coproc_cfg;
 408
 409         cpunum = smp_processor_id();
 410
 411         init_cpu_topology();
 412
 413         set_firmware_width_unlocked();
 414
 415         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 416         if (ret >= 0 && coproc_cfg.ccr_functional) {
 417                 mtctl(coproc_cfg.ccr_functional, 10);
 418
 419                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 420                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 421
 422                 asm volatile ("fstd     %fr0,8(%sp)");
 423         } else {
 424                 panic("must have an fpu to boot linux");
 425         }
 426
 427         early_trap_init(); /* initialize checksum of fault_vector */
 428
 429         start_kernel();
 430         // not reached
 431 }