linux/arch/m68knommu/kernel/setup.c
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   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
  40unsigned long memory_start;
  41unsigned long memory_end;
  42
  43EXPORT_SYMBOL(memory_start);
  44EXPORT_SYMBOL(memory_end);
  45
  46char __initdata command_line[COMMAND_LINE_SIZE];
  47
  48/* machine dependent timer functions */
  49void (*mach_gettod)(int*, int*, int*, int*, int*, int*);
  50int (*mach_set_clock_mmss)(unsigned long);
  51
  52/* machine dependent reboot functions */
  53void (*mach_reset)(void);
  54void (*mach_halt)(void);
  55void (*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
 112extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 113extern 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 */
 147void 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
 178void __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 */
 304static 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
 335static void *c_start(struct seq_file *m, loff_t *pos)
 336{
 337        return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 338}
 339
 340static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 341{
 342        ++*pos;
 343        return c_start(m, pos);
 344}
 345
 346static void c_stop(struct seq_file *m, void *v)
 347{
 348}
 349
 350const struct seq_operations cpuinfo_op = {
 351        .start  = c_start,
 352        .next   = c_next,
 353        .stop   = c_stop,
 354        .show   = show_cpuinfo,
 355};
 356
 357