arch/parisc/kernel/setup.c

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This source file includes following definitions.
setup_cmdline
dma_ops_init
setup_arch
c_start
c_next
c_stop
parisc_proc_mkdir
parisc_init_resources
parisc_init
start_parisc
   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 #if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
 155         conswitchp = &dummy_con;        /* we use do_take_over_console() later ! */
 156 #endif
 157 
 158         clear_sched_clock_stable();
 159 }
 160 
 161 /*
 162  * Display CPU info for all CPUs.
 163  * for parisc this is in processor.c
 164  */
 165 extern int show_cpuinfo (struct seq_file *m, void *v);
 166 
 167 static void *
 168 c_start (struct seq_file *m, loff_t *pos)
 169 {
 170         /* Looks like the caller will call repeatedly until we return
 171          * 0, signaling EOF perhaps.  This could be used to sequence
 172          * through CPUs for example.  Since we print all cpu info in our
 173          * show_cpuinfo() disregarding 'pos' (which I assume is 'v' above)
 174          * we only allow for one "position".  */
 175         return ((long)*pos < 1) ? (void *)1 : NULL;
 176 }
 177 
 178 static void *
 179 c_next (struct seq_file *m, void *v, loff_t *pos)
 180 {
 181         ++*pos;
 182         return c_start(m, pos);
 183 }
 184 
 185 static void
 186 c_stop (struct seq_file *m, void *v)
 187 {
 188 }
 189 
 190 const struct seq_operations cpuinfo_op = {
 191         .start  = c_start,
 192         .next   = c_next,
 193         .stop   = c_stop,
 194         .show   = show_cpuinfo
 195 };
 196 
 197 static void __init parisc_proc_mkdir(void)
 198 {
 199         /*
 200         ** Can't call proc_mkdir() until after proc_root_init() has been
 201         ** called by start_kernel(). In other words, this code can't
 202         ** live in arch/.../setup.c because start_parisc() calls
 203         ** start_kernel().
 204         */
 205         switch (boot_cpu_data.cpu_type) {
 206         case pcxl:
 207         case pcxl2:
 208                 if (NULL == proc_gsc_root)
 209                 {
 210                         proc_gsc_root = proc_mkdir("bus/gsc", NULL);
 211                 }
 212                 break;
 213         case pcxt_:
 214         case pcxu:
 215         case pcxu_:
 216         case pcxw:
 217         case pcxw_:
 218         case pcxw2:
 219                 if (NULL == proc_runway_root)
 220                 {
 221                         proc_runway_root = proc_mkdir("bus/runway", NULL);
 222                 }
 223                 break;
 224         case mako:
 225         case mako2:
 226                 if (NULL == proc_mckinley_root)
 227                 {
 228                         proc_mckinley_root = proc_mkdir("bus/mckinley", NULL);
 229                 }
 230                 break;
 231         default:
 232                 /* FIXME: this was added to prevent the compiler 
 233                  * complaining about missing pcx, pcxs and pcxt
 234                  * I'm assuming they have neither gsc nor runway */
 235                 break;
 236         }
 237 }
 238 
 239 static struct resource central_bus = {
 240         .name   = "Central Bus",
 241         .start  = F_EXTEND(0xfff80000),
 242         .end    = F_EXTEND(0xfffaffff),
 243         .flags  = IORESOURCE_MEM,
 244 };
 245 
 246 static struct resource local_broadcast = {
 247         .name   = "Local Broadcast",
 248         .start  = F_EXTEND(0xfffb0000),
 249         .end    = F_EXTEND(0xfffdffff),
 250         .flags  = IORESOURCE_MEM,
 251 };
 252 
 253 static struct resource global_broadcast = {
 254         .name   = "Global Broadcast",
 255         .start  = F_EXTEND(0xfffe0000),
 256         .end    = F_EXTEND(0xffffffff),
 257         .flags  = IORESOURCE_MEM,
 258 };
 259 
 260 static int __init parisc_init_resources(void)
 261 {
 262         int result;
 263 
 264         result = request_resource(&iomem_resource, &central_bus);
 265         if (result < 0) {
 266                 printk(KERN_ERR 
 267                        "%s: failed to claim %s address space!\n", 
 268                        __FILE__, central_bus.name);
 269                 return result;
 270         }
 271 
 272         result = request_resource(&iomem_resource, &local_broadcast);
 273         if (result < 0) {
 274                 printk(KERN_ERR 
 275                        "%s: failed to claim %saddress space!\n", 
 276                        __FILE__, local_broadcast.name);
 277                 return result;
 278         }
 279 
 280         result = request_resource(&iomem_resource, &global_broadcast);
 281         if (result < 0) {
 282                 printk(KERN_ERR 
 283                        "%s: failed to claim %s address space!\n", 
 284                        __FILE__, global_broadcast.name);
 285                 return result;
 286         }
 287 
 288         return 0;
 289 }
 290 
 291 extern void gsc_init(void);
 292 extern void processor_init(void);
 293 extern void ccio_init(void);
 294 extern void hppb_init(void);
 295 extern void dino_init(void);
 296 extern void iosapic_init(void);
 297 extern void lba_init(void);
 298 extern void sba_init(void);
 299 extern void eisa_init(void);
 300 
 301 static int __init parisc_init(void)
 302 {
 303         u32 osid = (OS_ID_LINUX << 16);
 304 
 305         parisc_proc_mkdir();
 306         parisc_init_resources();
 307         do_device_inventory();                  /* probe for hardware */
 308 
 309         parisc_pdc_chassis_init();
 310         
 311         /* set up a new led state on systems shipped LED State panel */
 312         pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BSTART);
 313 
 314         /* tell PDC we're Linux. Nevermind failure. */
 315         pdc_stable_write(0x40, &osid, sizeof(osid));
 316         
 317         /* start with known state */
 318         flush_cache_all_local();
 319         flush_tlb_all_local(NULL);
 320 
 321         processor_init();
 322 #ifdef CONFIG_SMP
 323         pr_info("CPU(s): %d out of %d %s at %d.%06d MHz online\n",
 324                 num_online_cpus(), num_present_cpus(),
 325 #else
 326         pr_info("CPU(s): 1 x %s at %d.%06d MHz\n",
 327 #endif
 328                         boot_cpu_data.cpu_name,
 329                         boot_cpu_data.cpu_hz / 1000000,
 330                         boot_cpu_data.cpu_hz % 1000000  );
 331 
 332 #if defined(CONFIG_64BIT) && defined(CONFIG_SMP)
 333         /* Don't serialize TLB flushes if we run on one CPU only. */
 334         if (num_online_cpus() == 1)
 335                 pa_serialize_tlb_flushes = 0;
 336 #endif
 337 
 338         apply_alternatives_all();
 339         parisc_setup_cache_timing();
 340 
 341         /* These are in a non-obvious order, will fix when we have an iotree */
 342 #if defined(CONFIG_IOSAPIC)
 343         iosapic_init();
 344 #endif
 345 #if defined(CONFIG_IOMMU_SBA)
 346         sba_init();
 347 #endif
 348 #if defined(CONFIG_PCI_LBA)
 349         lba_init();
 350 #endif
 351 
 352         /* CCIO before any potential subdevices */
 353 #if defined(CONFIG_IOMMU_CCIO)
 354         ccio_init();
 355 #endif
 356 
 357         /*
 358          * Need to register Asp & Wax before the EISA adapters for the IRQ
 359          * regions.  EISA must come before PCI to be sure it gets IRQ region
 360          * 0.
 361          */
 362 #if defined(CONFIG_GSC_LASI) || defined(CONFIG_GSC_WAX)
 363         gsc_init();
 364 #endif
 365 #ifdef CONFIG_EISA
 366         eisa_init();
 367 #endif
 368 
 369 #if defined(CONFIG_HPPB)
 370         hppb_init();
 371 #endif
 372 
 373 #if defined(CONFIG_GSC_DINO)
 374         dino_init();
 375 #endif
 376 
 377 #ifdef CONFIG_CHASSIS_LCD_LED
 378         register_led_regions(); /* register LED port info in procfs */
 379 #endif
 380 
 381         return 0;
 382 }
 383 arch_initcall(parisc_init);
 384 
 385 void __init start_parisc(void)
 386 {
 387         extern void early_trap_init(void);
 388 
 389         int ret, cpunum;
 390         struct pdc_coproc_cfg coproc_cfg;
 391 
 392         /* check QEMU/SeaBIOS marker in PAGE0 */
 393         running_on_qemu = (memcmp(&PAGE0->pad0, "SeaBIOS", 8) == 0);
 394 
 395         cpunum = smp_processor_id();
 396 
 397         init_cpu_topology();
 398 
 399         set_firmware_width_unlocked();
 400 
 401         ret = pdc_coproc_cfg_unlocked(&coproc_cfg);
 402         if (ret >= 0 && coproc_cfg.ccr_functional) {
 403                 mtctl(coproc_cfg.ccr_functional, 10);
 404 
 405                 per_cpu(cpu_data, cpunum).fp_rev = coproc_cfg.revision;
 406                 per_cpu(cpu_data, cpunum).fp_model = coproc_cfg.model;
 407 
 408                 asm volatile ("fstd     %fr0,8(%sp)");
 409         } else {
 410                 panic("must have an fpu to boot linux");
 411         }
 412 
 413         early_trap_init(); /* initialize checksum of fault_vector */
 414 
 415         start_kernel();
 416         // not reached
 417 }
/* [<][>][^][v][top][bottom][index][help] */
root/arch/parisc/kernel/setup.c

DEFINITIONS
