arch/parisc/kernel/setup.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   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
  15 #include <linux/kernel.h>
  16 #include <linux/initrd.h>
  17 #include <linux/init.h>
  18 #include <linux/console.h>
  19 #include <linux/seq_file.h>
  20 #define PCI_DEBUG
  21 #include <linux/pci.h>
  22 #undef PCI_DEBUG
  23 #include <linux/proc_fs.h>
  24 #include <linux/export.h>
  25 #include <linux/sched.h>
  26 #include <linux/sched/clock.h>
  27 #include <linux/start_kernel.h>
  28
  29 #include <asm/cacheflush.h>
  30 #include <asm/processor.h>
  31 #include <asm/sections.h>
  32 #include <asm/pdc.h>
  33 #include <asm/led.h>
  34 #include <asm/machdep.h>        /* for pa7300lc_init() proto */
  35 #include <asm/pdc_chassis.h>
  36 #include <asm/io.h>
  37 #include <asm/setup.h>
  38 #include <asm/unwind.h>
  39 #include <asm/smp.h>
  40
  41 static char __initdata command_line[COMMAND_LINE_SIZE];
  42
  43 /* Intended for ccio/sba/cpu statistics under /proc/bus/{runway|gsc} */
  44 struct proc_dir_entry * proc_runway_root __read_mostly = NULL;
  45 struct proc_dir_entry * proc_gsc_root __read_mostly = NULL;
  46 struct proc_dir_entry * proc_mckinley_root __read_mostly = NULL;
  47
  48 void __init setup_cmdline(char **cmdline_p)
  49 {
  50         extern unsigned int boot_args[];
  51
  52         /* Collect stuff passed in from the boot loader */
  53
  54         /* boot_args[0] is free-mem start, boot_args[1] is ptr to command line */
  55         if (boot_args[0] < 64) {
  56                 /* called from hpux boot loader */
  57                 boot_command_line[0] = '\0';
  58         } else {
  59                 strlcpy(boot_command_line, (char *)__va(boot_args[1]),
  60                         COMMAND_LINE_SIZE);
  61
  62 #ifdef CONFIG_BLK_DEV_INITRD
  63                 if (boot_args[2] != 0) /* did palo pass us a ramdisk? */
  64                 {
  65                     initrd_start = (unsigned long)__va(boot_args[2]);
  66                     initrd_end = (unsigned long)__va(boot_args[3]);
  67                 }
  68 #endif
  69         }
  70
  71         strcpy(command_line, boot_command_line);
  72         *cmdline_p = command_line;
  73 }
  74
  75 #ifdef CONFIG_PA11
  76 void __init dma_ops_init(void)
  77 {
  78         switch (boot_cpu_data.cpu_type) {
  79         case pcx:
  80                 /*
  81                  * We've got way too many dependencies on 1.1 semantics
  82                  * to support 1.0 boxes at this point.
  83                  */
  84                 panic(  "PA-RISC Linux currently only supports machines that conform to\n"
  85                         "the PA-RISC 1.1 or 2.0 architecture specification.\n");
  86
  87         case pcxl2:
  88                 pa7300lc_init();
  89                 break;
  90         default:
  91                 break;
  92         }
  93 }
  94 #endif
  95
  96 extern void collect_boot_cpu_data(void);
  97
  98 void __init setup_arch(char **cmdline_p)
  99 {
 100 #ifdef CONFIG_64BIT
 101         extern int parisc_narrow_firmware;
 102 #endif
 103         unwind_init();
 104
 105         init_per_cpu(smp_processor_id());       /* Set Modes & Enable FP */
 106
 107 #ifdef CONFIG_64BIT
 108         printk(KERN_INFO "The 64-bit Kernel has started...\n");
 109 #else
 110         printk(KERN_INFO "The 32-bit Kernel has started...\n");
 111 #endif
 112
 113         printk(KERN_INFO "Kernel default page size is %d KB. Huge pages ",
 114                 (int)(PAGE_SIZE / 1024));
 115 #ifdef CONFIG_HUGETLB_PAGE
 116         printk(KERN_CONT "enabled with %d MB physical and %d MB virtual size",
 117                  1 << (REAL_HPAGE_SHIFT - 20), 1 << (HPAGE_SHIFT - 20));
 118 #else
 119         printk(KERN_CONT "disabled");
 120 #endif
 121         printk(KERN_CONT ".\n");
 122
 123         /*
 124          * Check if initial kernel page mappings are sufficient.
 125          * panic early if not, else we may access kernel functions
 126          * and variables which can't be reached.
 127          */
 128         if (__pa((unsigned long) &_end) >= KERNEL_INITIAL_SIZE)
 129                 panic("KERNEL_INITIAL_ORDER too small!");
 130
 131         pdc_console_init();
 132
 133 #ifdef CONFIG_64BIT
 134         if(parisc_narrow_firmware) {
 135                 printk(KERN_INFO "Kernel is using PDC in 32-bit mode.\n");
 136         }
 137 #endif
 138         setup_pdc();
 139         setup_cmdline(cmdline_p);
 140         collect_boot_cpu_data();
 141         do_memory_inventory();  /* probe for physical memory */
 142         parisc_cache_init();
 143         paging_init();
 144
 145 #ifdef CONFIG_CHASSIS_LCD_LED
 146         /* initialize the LCD/LED after boot_cpu_data is available ! */
 147         led_init();             /* LCD/LED initialization */
 148 #endif
 149
 150 #ifdef CONFIG_PA11
 151         dma_ops_init();
 152 #endif
 153
 154         clear_sched_clock_stable();
 155 }
 156
 157 /*
 158  * Display CPU info for all CPUs.
 159  * for parisc this is in processor.c
 160  */
 161 extern int show_cpuinfo (struct seq_file *m, void *v);
 162
 163 static void *
 164 c_start (struct seq_file *m, loff_t *pos)
 165 {
 166         /* Looks like the caller will call repeatedly until we return
 167          * 0, signaling EOF perhaps.  This could be used to sequence
 168          * through CPUs for example.  Since we print all cpu info in our
 169          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 170          * we only allow for one "position".  */
 171         return ((long)*pos < 1) ? (void *)1 : NULL;
 172 }
 173
 174 static void *
 175 c_next (struct seq_file *m, void *v, loff_t *pos)
 176 {
 177         ++*pos;
 178         return c_start(m, pos);
 179 }
 180
 181 static void
 182 c_stop (struct seq_file *m, void *v)
 183 {
 184 }
 185
 186 const struct seq_operations cpuinfo_op = {
 187         .start  = c_start,
 188         .next   = c_next,
 189         .stop   = c_stop,
 190         .show   = show_cpuinfo
 191 };
 192
 193 static void __init parisc_proc_mkdir(void)
 194 {
 195         /*
 196         ** Can't call proc_mkdir() until after proc_root_init() has been
 197         ** called by start_kernel(). In other words, this code can't
 198         ** live in arch/.../setup.c because start_parisc() calls
 199         ** start_kernel().
 200         */
 201         switch (boot_cpu_data.cpu_type) {
 202         case pcxl:
 203         case pcxl2:
 204                 if (NULL == proc_gsc_root)
 205                 {
 206                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 207                 }
 208                 break;
 209         case pcxt_:
 210         case pcxu:
 211         case pcxu_:
 212         case pcxw:
 213         case pcxw_:
 214         case pcxw2:
 215                 if (NULL == proc_runway_root)
 216                 {
 217                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 218                 }
 219                 break;
 220         case mako:
 221         case mako2:
 222                 if (NULL == proc_mckinley_root)
 223                 {
 224                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 225                 }
 226                 break;
 227         default:
 228                 /* FIXME: this was added to prevent the compiler
 229                  * complaining about missing pcx, pcxs and pcxt
 230                  * I'm assuming they have neither gsc nor runway */
 231                 break;
 232         }
 233 }
 234
 235 static struct resource central_bus = {
 236         .name   = "Central Bus",
 237         .start  = F_EXTEND(0xfff80000),
 238         .end    = F_EXTEND(0xfffaffff),
 239         .flags  = IORESOURCE_MEM,
 240 };
 241
 242 static struct resource local_broadcast = {
 243         .name   = "Local Broadcast",
 244         .start  = F_EXTEND(0xfffb0000),
 245         .end    = F_EXTEND(0xfffdffff),
 246         .flags  = IORESOURCE_MEM,
 247 };
 248
 249 static struct resource global_broadcast = {
 250         .name   = "Global Broadcast",
 251         .start  = F_EXTEND(0xfffe0000),
 252         .end    = F_EXTEND(0xffffffff),
 253         .flags  = IORESOURCE_MEM,
 254 };
 255
 256 static int __init parisc_init_resources(void)
 257 {
 258         int result;
 259
 260         result = request_resource(&iomem_resource, &central_bus);
 261         if (result < 0) {
 262                 printk(KERN_ERR
 263                        "%s: failed to claim %s address space!\n",
 264                        __FILE__, central_bus.name);
 265                 return result;
 266         }
 267
 268         result = request_resource(&iomem_resource, &local_broadcast);
 269         if (result < 0) {
 270                 printk(KERN_ERR
 271                        "%s: failed to claim %saddress space!\n",
 272                        __FILE__, local_broadcast.name);
 273                 return result;
 274         }
 275
 276         result = request_resource(&iomem_resource, &global_broadcast);
 277         if (result < 0) {
 278                 printk(KERN_ERR
 279                        "%s: failed to claim %s address space!\n",
 280                        __FILE__, global_broadcast.name);
 281                 return result;
 282         }
 283
 284         return 0;
 285 }
 286
 287 extern void gsc_init(void);
 288 extern void processor_init(void);
 289 extern void ccio_init(void);
 290 extern void hppb_init(void);
 291 extern void dino_init(void);
 292 extern void iosapic_init(void);
 293 extern void lba_init(void);
 294 extern void sba_init(void);
 295 extern void eisa_init(void);
 296
 297 static int __init parisc_init(void)
 298 {
 299         u32 osid = (OS_ID_LINUX << 16);
 300
 301         parisc_proc_mkdir();
 302         parisc_init_resources();
 303         do_device_inventory();                  /* probe for hardware */
 304
 305         parisc_pdc_chassis_init();
 306
 307         /* set up a new led state on systems shipped LED State panel */
 308         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 309
 310         /* tell PDC we're Linux. Nevermind failure. */
 311         pdc_stable_write(0x40, &osid, sizeof(osid));
 312
 313         /* start with known state */
 314         flush_cache_all_local();
 315         flush_tlb_all_local(NULL);
 316
 317         processor_init();
 318 #ifdef CONFIG_SMP
 319         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 320                 num_online_cpus(), num_present_cpus(),
 321 #else
 322         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 323 #endif
 324                         boot_cpu_data.cpu_name,
 325                         boot_cpu_data.cpu_hz / 1000000,
 326                         boot_cpu_data.cpu_hz % 1000000  );
 327
 328 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
 329         /* Don't serialize TLB flushes if we run on one CPU only. */
 330         if (num_online_cpus() == 1)
 331                 pa_serialize_tlb_flushes = 0;
 332 #endif
 333
 334         apply_alternatives_all();
 335         parisc_setup_cache_timing();
 336
 337         /* These are in a non-obvious order, will fix when we have an iotree */
 338 #if defined(CONFIG_IOSAPIC)
 339         iosapic_init();
 340 #endif
 341 #if defined(CONFIG_IOMMU_SBA)
 342         sba_init();
 343 #endif
 344 #if defined(CONFIG_PCI_LBA)
 345         lba_init();
 346 #endif
 347
 348         /* CCIO before any potential subdevices */
 349 #if defined(CONFIG_IOMMU_CCIO)
 350         ccio_init();
 351 #endif
 352
 353         /*
 354          * Need to register Asp & Wax before the EISA adapters for the IRQ
 355          * regions.  EISA must come before PCI to be sure it gets IRQ region
 356          * 0.
 357          */
 358 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 359         gsc_init();
 360 #endif
 361 #ifdef CONFIG_EISA
 362         eisa_init();
 363 #endif
 364
 365 #if defined(CONFIG_HPPB)
 366         hppb_init();
 367 #endif
 368
 369 #if defined(CONFIG_GSC_DINO)
 370         dino_init();
 371 #endif
 372
 373 #ifdef CONFIG_CHASSIS_LCD_LED
 374         register_led_regions(); /* register LED port info in procfs */
 375 #endif
 376
 377         return 0;
 378 }
 379 arch_initcall(parisc_init);
 380
 381 void __init start_parisc(void)
 382 {
 383         extern void early_trap_init(void);
 384
 385         int ret, cpunum;
 386         struct pdc_coproc_cfg coproc_cfg;
 387
 388         /* check QEMU/SeaBIOS marker in PAGE0 */
 389         running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
 390
 391         cpunum = smp_processor_id();
 392
 393         init_cpu_topology();
 394
 395         set_firmware_width_unlocked();
 396
 397         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 398         if (ret >= 0 && coproc_cfg.ccr_functional) {
 399                 mtctl(coproc_cfg.ccr_functional, 10);
 400
 401                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 402                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 403
 404                 asm volatile ("fstd     %fr0,8(%sp)");
 405         } else {
 406                 panic("must have an fpu to boot linux");
 407         }
 408
 409         early_trap_init(); /* initialize checksum of fault_vector */
 410
 411         start_kernel();
 412         // not reached
 413 }