arch/m68k/kernel/setup_no.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_M68328
  58 #define CPU_NAME        "MC68328"
  59 #endif
  60 #ifdef CONFIG_M68EZ328
  61 #define CPU_NAME        "MC68EZ328"
  62 #endif
  63 #ifdef CONFIG_M68VZ328
  64 #define CPU_NAME        "MC68VZ328"
  65 #endif
  66 #ifdef CONFIG_M68360
  67 #define CPU_NAME        "MC68360"
  68 #endif
  69 #ifndef CPU_NAME
  70 #define CPU_NAME        "UNKNOWN"
  71 #endif
  72
  73 /*
  74  * Different cores have different instruction execution timings.
  75  * The old/traditional 68000 cores are basically all the same, at 16.
  76  * The ColdFire cores vary a little, their values are defined in their
  77  * headers. We default to the standard 68000 value here.
  78  */
  79 #ifndef CPU_INSTR_PER_JIFFY
  80 #define CPU_INSTR_PER_JIFFY     16
  81 #endif
  82
  83 extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
  84 extern int _ramstart, _ramend;
  85
  86 #if defined(CONFIG_UBOOT)
  87 /*
  88  * parse_uboot_commandline
  89  *
  90  * Copies u-boot commandline arguments and store them in the proper linux
  91  * variables.
  92  *
  93  * Assumes:
  94  *      _init_sp global contains the address in the stack pointer when the
  95  *      kernel starts (see head.S::_start)
  96  *
  97  *      U-Boot calling convention:
  98  *      (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
  99  *
 100  *      _init_sp can be parsed as such
 101  *
 102  *      _init_sp+00 = u-boot cmd after jsr into kernel (skip)
 103  *      _init_sp+04 = &kernel board_info (residual data)
 104  *      _init_sp+08 = &initrd_start
 105  *      _init_sp+12 = &initrd_end
 106  *      _init_sp+16 = &cmd_start
 107  *      _init_sp+20 = &cmd_end
 108  *
 109  *      This also assumes that the memory locations pointed to are still
 110  *      unmodified. U-boot places them near the end of external SDRAM.
 111  *
 112  * Argument(s):
 113  *      commandp = the linux commandline arg container to fill.
 114  *      size     = the sizeof commandp.
 115  *
 116  * Returns:
 117  */
 118 void parse_uboot_commandline(char *commandp, int size)
 119 {
 120         extern unsigned long _init_sp;
 121         unsigned long *sp;
 122         unsigned long uboot_kbd;
 123         unsigned long uboot_initrd_start, uboot_initrd_end;
 124         unsigned long uboot_cmd_start, uboot_cmd_end;
 125
 126
 127         sp = (unsigned long *)_init_sp;
 128         uboot_kbd = sp[1];
 129         uboot_initrd_start = sp[2];
 130         uboot_initrd_end = sp[3];
 131         uboot_cmd_start = sp[4];
 132         uboot_cmd_end = sp[5];
 133
 134         if (uboot_cmd_start && uboot_cmd_end)
 135                 strncpy(commandp, (const char *)uboot_cmd_start, size);
 136 #if defined(CONFIG_BLK_DEV_INITRD)
 137         if (uboot_initrd_start && uboot_initrd_end &&
 138                 (uboot_initrd_end > uboot_initrd_start)) {
 139                 initrd_start = uboot_initrd_start;
 140                 initrd_end = uboot_initrd_end;
 141                 ROOT_DEV = Root_RAM0;
 142                 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 143                         initrd_start, initrd_end);
 144         }
 145 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 146 }
 147 #endif /* #if defined(CONFIG_UBOOT) */
 148
 149 void __init setup_arch(char **cmdline_p)
 150 {
 151         int bootmap_size;
 152
 153         memory_start = PAGE_ALIGN(_ramstart);
 154         memory_end = _ramend;
 155
 156         init_mm.start_code = (unsigned long) &_stext;
 157         init_mm.end_code = (unsigned long) &_etext;
 158         init_mm.end_data = (unsigned long) &_edata;
 159         init_mm.brk = (unsigned long) 0;
 160
 161         config_BSP(&command_line[0], sizeof(command_line));
 162
 163 #if defined(CONFIG_BOOTPARAM)
 164         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 165         command_line[sizeof(command_line) - 1] = 0;
 166 #endif /* CONFIG_BOOTPARAM */
 167
 168 #if defined(CONFIG_UBOOT)
 169         /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 170         #if defined(CONFIG_BOOTPARAM)
 171                 /* Add the whitespace separator */
 172                 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 173                 /* Parse uboot command line into the rest of the buffer */
 174                 parse_uboot_commandline(
 175                         &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 176                         (sizeof(command_line) -
 177                         (strlen(CONFIG_BOOTPARAM_STRING)+1)));
 178         /* Only CONFIG_UBOOT defined, create cmdline */
 179         #else
 180                 parse_uboot_commandline(&command_line[0], sizeof(command_line));
 181         #endif /* CONFIG_BOOTPARAM */
 182         command_line[sizeof(command_line) - 1] = 0;
 183 #endif /* CONFIG_UBOOT */
 184
 185         printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
 186
 187 #ifdef CONFIG_UCDIMM
 188         printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 189 #endif
 190 #ifdef CONFIG_M68VZ328
 191         printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 192 #endif
 193 #ifdef CONFIG_COLDFIRE
 194         printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 195 #ifdef CONFIG_M5307
 196         printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 197 #endif
 198 #ifdef CONFIG_ELITE
 199         printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 200 #endif
 201 #endif
 202         printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 203
 204 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 205         printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 206 #endif
 207 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 208         printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 209 #endif
 210 #if defined (CONFIG_M68360)
 211         printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
 212         printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
 213 #endif
 214 #ifdef CONFIG_DRAGEN2
 215         printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 216 #endif
 217 #ifdef CONFIG_M5235EVB
 218         printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 219 #endif
 220
 221         pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
 222                  "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
 223                  (int) &_sdata, (int) &_edata,
 224                  (int) &_sbss, (int) &_ebss);
 225         pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
 226                  (int) &_ebss, (int) memory_start,
 227                  (int) memory_start, (int) memory_end);
 228
 229         /* Keep a copy of command line */
 230         *cmdline_p = &command_line[0];
 231         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 232         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 233
 234 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 235         conswitchp = &dummy_con;
 236 #endif
 237
 238         /*
 239          * Give all the memory to the bootmap allocator, tell it to put the
 240          * boot mem_map at the start of memory.
 241          */
 242         bootmap_size = init_bootmem_node(
 243                         NODE_DATA(0),
 244                         memory_start >> PAGE_SHIFT, /* map goes here */
 245                         PAGE_OFFSET >> PAGE_SHIFT,      /* 0 on coldfire */
 246                         memory_end >> PAGE_SHIFT);
 247         /*
 248          * Free the usable memory, we have to make sure we do not free
 249          * the bootmem bitmap so we then reserve it after freeing it :-)
 250          */
 251         free_bootmem(memory_start, memory_end - memory_start);
 252         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 253
 254 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 255         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 256                         (initrd_end < memory_end))
 257                 reserve_bootmem(initrd_start, initrd_end - initrd_start,
 258                                  BOOTMEM_DEFAULT);
 259 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 260
 261         /*
 262          * Get kmalloc into gear.
 263          */
 264         paging_init();
 265 }
 266
 267 /*
 268  *      Get CPU information for use by the procfs.
 269  */
 270 static int show_cpuinfo(struct seq_file *m, void *v)
 271 {
 272         char *cpu, *mmu, *fpu;
 273         u_long clockfreq;
 274
 275         cpu = CPU_NAME;
 276         mmu = "none";
 277         fpu = "none";
 278         clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 279
 280         seq_printf(m, "CPU:\t\t%s\n"
 281                       "MMU:\t\t%s\n"
 282                       "FPU:\t\t%s\n"
 283                       "Clocking:\t%lu.%1luMHz\n"
 284                       "BogoMips:\t%lu.%02lu\n"
 285                       "Calibration:\t%lu loops\n",
 286                       cpu, mmu, fpu,
 287                       clockfreq / 1000000,
 288                       (clockfreq / 100000) % 10,
 289                       (loops_per_jiffy * HZ) / 500000,
 290                       ((loops_per_jiffy * HZ) / 5000) % 100,
 291                       (loops_per_jiffy * HZ));
 292
 293         return 0;
 294 }
 295
 296 static void *c_start(struct seq_file *m, loff_t *pos)
 297 {
 298         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 299 }
 300
 301 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 302 {
 303         ++*pos;
 304         return c_start(m, pos);
 305 }
 306
 307 static void c_stop(struct seq_file *m, void *v)
 308 {
 309 }
 310
 311 const struct seq_operations cpuinfo_op = {
 312         .start  = c_start,
 313         .next   = c_next,
 314         .stop   = c_stop,
 315         .show   = show_cpuinfo,
 316 };
 317