arch/m68knommu/kernel/setup.c

   1 /*
   2  *  linux/arch/m68knommu/kernel/setup.c
   3  *
   4  *  Copyright (C) 1999-2007  Greg Ungerer (gerg@snapgear.com)
   5  *  Copyright (C) 1998,1999  D. Jeff Dionne <jeff@uClinux.org>
   6  *  Copyleft  ()) 2000       James D. Schettine {james@telos-systems.com}
   7  *  Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   8  *  Copyright (C) 1995       Hamish Macdonald
   9  *  Copyright (C) 2000       Lineo Inc. (www.lineo.com)
  10  *  Copyright (C) 2001       Lineo, Inc. <www.lineo.com>
  11  *
  12  *  68VZ328 Fixes/support    Evan Stawnyczy <e@lineo.ca>
  13  */
  14
  15 /*
  16  * This file handles the architecture-dependent parts of system setup
  17  */
  18
  19 #include <linux/kernel.h>
  20 #include <linux/sched.h>
  21 #include <linux/delay.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/fb.h>
  24 #include <linux/module.h>
  25 #include <linux/mm.h>
  26 #include <linux/console.h>
  27 #include <linux/errno.h>
  28 #include <linux/string.h>
  29 #include <linux/bootmem.h>
  30 #include <linux/seq_file.h>
  31 #include <linux/init.h>
  32 #include <linux/initrd.h>
  33 #include <linux/root_dev.h>
  34
  35 #include <asm/setup.h>
  36 #include <asm/irq.h>
  37 #include <asm/machdep.h>
  38 #include <asm/pgtable.h>
  39
  40 unsigned long memory_start;
  41 unsigned long memory_end;
  42
  43 EXPORT_SYMBOL(memory_start);
  44 EXPORT_SYMBOL(memory_end);
  45
  46 char __initdata command_line[COMMAND_LINE_SIZE];
  47
  48 /* machine dependent timer functions */
  49 void (*mach_gettod)(int*, int*, int*, int*, int*, int*);
  50 int (*mach_set_clock_mmss)(unsigned long);
  51
  52 /* machine dependent reboot functions */
  53 void (*mach_reset)(void);
  54 void (*mach_halt)(void);
  55 void (*mach_power_off)(void);
  56
  57 #ifdef CONFIG_M68000
  58         #define CPU "MC68000"
  59 #endif
  60 #ifdef CONFIG_M68328
  61         #define CPU "MC68328"
  62 #endif
  63 #ifdef CONFIG_M68EZ328
  64         #define CPU "MC68EZ328"
  65 #endif
  66 #ifdef CONFIG_M68VZ328
  67         #define CPU "MC68VZ328"
  68 #endif
  69 #ifdef CONFIG_M68360
  70         #define CPU "MC68360"
  71 #endif
  72 #if defined(CONFIG_M5206)
  73         #define CPU "COLDFIRE(m5206)"
  74 #endif
  75 #if defined(CONFIG_M5206e)
  76         #define CPU "COLDFIRE(m5206e)"
  77 #endif
  78 #if defined(CONFIG_M520x)
  79         #define CPU "COLDFIRE(m520x)"
  80 #endif
  81 #if defined(CONFIG_M523x)
  82         #define CPU "COLDFIRE(m523x)"
  83 #endif
  84 #if defined(CONFIG_M5249)
  85         #define CPU "COLDFIRE(m5249)"
  86 #endif
  87 #if defined(CONFIG_M5271)
  88         #define CPU "COLDFIRE(m5270/5271)"
  89 #endif
  90 #if defined(CONFIG_M5272)
  91         #define CPU "COLDFIRE(m5272)"
  92 #endif
  93 #if defined(CONFIG_M5275)
  94         #define CPU "COLDFIRE(m5274/5275)"
  95 #endif
  96 #if defined(CONFIG_M528x)
  97         #define CPU "COLDFIRE(m5280/5282)"
  98 #endif
  99 #if defined(CONFIG_M5307)
 100         #define CPU "COLDFIRE(m5307)"
 101 #endif
 102 #if defined(CONFIG_M532x)
 103         #define CPU "COLDFIRE(m532x)"
 104 #endif
 105 #if defined(CONFIG_M5407)
 106         #define CPU "COLDFIRE(m5407)"
 107 #endif
 108 #ifndef CPU
 109         #define CPU "UNKNOWN"
 110 #endif
 111
 112 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 113 extern int _ramstart, _ramend;
 114
 115 #if defined(CONFIG_UBOOT)
 116 /*
 117  * parse_uboot_commandline
 118  *
 119  * Copies u-boot commandline arguments and store them in the proper linux
 120  * variables.
 121  *
 122  * Assumes:
 123  *      _init_sp global contains the address in the stack pointer when the
 124  *      kernel starts (see head.S::_start)
 125  *
 126  *      U-Boot calling convention:
 127  *      (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
 128  *
 129  *      _init_sp can be parsed as such
 130  *
 131  *      _init_sp+00 = u-boot cmd after jsr into kernel (skip)
 132  *      _init_sp+04 = &kernel board_info (residual data)
 133  *      _init_sp+08 = &initrd_start
 134  *      _init_sp+12 = &initrd_end
 135  *      _init_sp+16 = &cmd_start
 136  *      _init_sp+20 = &cmd_end
 137  *
 138  *      This also assumes that the memory locations pointed to are still
 139  *      unmodified. U-boot places them near the end of external SDRAM.
 140  *
 141  * Argument(s):
 142  *      commandp = the linux commandline arg container to fill.
 143  *      size     = the sizeof commandp.
 144  *
 145  * Returns:
 146  */
 147 void parse_uboot_commandline(char *commandp, int size)
 148 {
 149         extern unsigned long _init_sp;
 150         unsigned long *sp;
 151         unsigned long uboot_kbd;
 152         unsigned long uboot_initrd_start, uboot_initrd_end;
 153         unsigned long uboot_cmd_start, uboot_cmd_end;
 154
 155
 156         sp = (unsigned long *)_init_sp;
 157         uboot_kbd = sp[1];
 158         uboot_initrd_start = sp[2];
 159         uboot_initrd_end = sp[3];
 160         uboot_cmd_start = sp[4];
 161         uboot_cmd_end = sp[5];
 162
 163         if (uboot_cmd_start && uboot_cmd_end)
 164                 strncpy(commandp, (const char *)uboot_cmd_start, size);
 165 #if defined(CONFIG_BLK_DEV_INITRD)
 166         if (uboot_initrd_start && uboot_initrd_end &&
 167                 (uboot_initrd_end > uboot_initrd_start)) {
 168                 initrd_start = uboot_initrd_start;
 169                 initrd_end = uboot_initrd_end;
 170                 ROOT_DEV = Root_RAM0;
 171                 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 172                         initrd_start, initrd_end);
 173         }
 174 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 175 }
 176 #endif /* #if defined(CONFIG_UBOOT) */
 177
 178 void __init setup_arch(char **cmdline_p)
 179 {
 180         int bootmap_size;
 181
 182         memory_start = PAGE_ALIGN(_ramstart);
 183         memory_end = _ramend;
 184
 185         init_mm.start_code = (unsigned long) &_stext;
 186         init_mm.end_code = (unsigned long) &_etext;
 187         init_mm.end_data = (unsigned long) &_edata;
 188         init_mm.brk = (unsigned long) 0;
 189
 190         config_BSP(&command_line[0], sizeof(command_line));
 191
 192 #if defined(CONFIG_BOOTPARAM)
 193         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 194         command_line[sizeof(command_line) - 1] = 0;
 195 #endif /* CONFIG_BOOTPARAM */
 196
 197 #if defined(CONFIG_UBOOT)
 198         /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 199         #if defined(CONFIG_BOOTPARAM)
 200                 /* Add the whitespace separator */
 201                 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 202                 /* Parse uboot command line into the rest of the buffer */
 203                 parse_uboot_commandline(
 204                         &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 205                         (sizeof(command_line) -
 206                         (strlen(CONFIG_BOOTPARAM_STRING)+1)));
 207         /* Only CONFIG_UBOOT defined, create cmdline */
 208         #else
 209                 parse_uboot_commandline(&command_line[0], sizeof(command_line));
 210         #endif /* CONFIG_BOOTPARAM */
 211         command_line[sizeof(command_line) - 1] = 0;
 212 #endif /* CONFIG_UBOOT */
 213
 214         printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU "\n");
 215
 216 #ifdef CONFIG_UCDIMM
 217         printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 218 #endif
 219 #ifdef CONFIG_M68VZ328
 220         printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 221 #endif
 222 #ifdef CONFIG_COLDFIRE
 223         printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 224 #ifdef CONFIG_M5307
 225         printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 226 #endif
 227 #ifdef CONFIG_ELITE
 228         printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 229 #endif
 230 #endif
 231         printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 232
 233 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 234         printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 235 #endif
 236 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 237         printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 238 #endif
 239 #if defined (CONFIG_M68360)
 240         printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
 241         printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
 242 #endif
 243 #ifdef CONFIG_DRAGEN2
 244         printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 245 #endif
 246 #ifdef CONFIG_M5235EVB
 247         printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 248 #endif
 249
 250         pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
 251                  "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
 252                  (int) &_sdata, (int) &_edata,
 253                  (int) &_sbss, (int) &_ebss);
 254         pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
 255                  (int) &_ebss, (int) memory_start,
 256                  (int) memory_start, (int) memory_end);
 257
 258         /* Keep a copy of command line */
 259         *cmdline_p = &command_line[0];
 260         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 261         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 262
 263 #ifdef DEBUG
 264         if (strlen(*cmdline_p))
 265                 printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
 266 #endif
 267
 268 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 269         conswitchp = &dummy_con;
 270 #endif
 271
 272         /*
 273          * Give all the memory to the bootmap allocator, tell it to put the
 274          * boot mem_map at the start of memory.
 275          */
 276         bootmap_size = init_bootmem_node(
 277                         NODE_DATA(0),
 278                         memory_start >> PAGE_SHIFT, /* map goes here */
 279                         PAGE_OFFSET >> PAGE_SHIFT,      /* 0 on coldfire */
 280                         memory_end >> PAGE_SHIFT);
 281         /*
 282          * Free the usable memory, we have to make sure we do not free
 283          * the bootmem bitmap so we then reserve it after freeing it :-)
 284          */
 285         free_bootmem(memory_start, memory_end - memory_start);
 286         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 287
 288 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 289         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 290                         (initrd_end < memory_end))
 291                 reserve_bootmem(initrd_start, initrd_end - initrd_start,
 292                                  BOOTMEM_DEFAULT);
 293 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 294
 295         /*
 296          * Get kmalloc into gear.
 297          */
 298         paging_init();
 299 }
 300
 301 /*
 302  *      Get CPU information for use by the procfs.
 303  */
 304 static int show_cpuinfo(struct seq_file *m, void *v)
 305 {
 306         char *cpu, *mmu, *fpu;
 307         u_long clockfreq;
 308
 309         cpu = CPU;
 310         mmu = "none";
 311         fpu = "none";
 312
 313 #ifdef CONFIG_COLDFIRE
 314         clockfreq = (loops_per_jiffy * HZ) * 3;
 315 #else
 316         clockfreq = (loops_per_jiffy * HZ) * 16;
 317 #endif
 318
 319         seq_printf(m, "CPU:\t\t%s\n"
 320                       "MMU:\t\t%s\n"
 321                       "FPU:\t\t%s\n"
 322                       "Clocking:\t%lu.%1luMHz\n"
 323                       "BogoMips:\t%lu.%02lu\n"
 324                       "Calibration:\t%lu loops\n",
 325                       cpu, mmu, fpu,
 326                       clockfreq / 1000000,
 327                       (clockfreq / 100000) % 10,
 328                       (loops_per_jiffy * HZ) / 500000,
 329                       ((loops_per_jiffy * HZ) / 5000) % 100,
 330                       (loops_per_jiffy * HZ));
 331
 332         return 0;
 333 }
 334
 335 static void *c_start(struct seq_file *m, loff_t *pos)
 336 {
 337         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 338 }
 339
 340 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 341 {
 342         ++*pos;
 343         return c_start(m, pos);
 344 }
 345
 346 static void c_stop(struct seq_file *m, void *v)
 347 {
 348 }
 349
 350 const struct seq_operations cpuinfo_op = {
 351         .start  = c_start,
 352         .next   = c_next,
 353         .stop   = c_stop,
 354         .show   = show_cpuinfo,
 355 };
 356