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_M68328
  58        #define CPU "MC68328"
  59#endif
  60#ifdef CONFIG_M68EZ328
  61        #define CPU "MC68EZ328"
  62#endif
  63#ifdef CONFIG_M68VZ328
  64        #define CPU "MC68VZ328"
  65#endif
  66#ifdef CONFIG_M68360
  67        #define CPU "MC68360"
  68#endif
  69#if defined(CONFIG_M5206)
  70        #define CPU "COLDFIRE(m5206)"
  71#endif
  72#if defined(CONFIG_M5206e)
  73        #define CPU "COLDFIRE(m5206e)"
  74#endif
  75#if defined(CONFIG_M520x)
  76        #define CPU "COLDFIRE(m520x)"
  77#endif
  78#if defined(CONFIG_M523x)
  79        #define CPU "COLDFIRE(m523x)"
  80#endif
  81#if defined(CONFIG_M5249)
  82        #define CPU "COLDFIRE(m5249)"
  83#endif
  84#if defined(CONFIG_M5271)
  85        #define CPU "COLDFIRE(m5270/5271)"
  86#endif
  87#if defined(CONFIG_M5272)
  88        #define CPU "COLDFIRE(m5272)"
  89#endif
  90#if defined(CONFIG_M5275)
  91        #define CPU "COLDFIRE(m5274/5275)"
  92#endif
  93#if defined(CONFIG_M528x)
  94        #define CPU "COLDFIRE(m5280/5282)"
  95#endif
  96#if defined(CONFIG_M5307)
  97        #define CPU "COLDFIRE(m5307)"
  98#endif
  99#if defined(CONFIG_M532x)
 100        #define CPU "COLDFIRE(m532x)"
 101#endif
 102#if defined(CONFIG_M5407)
 103        #define CPU "COLDFIRE(m5407)"
 104#endif
 105#ifndef CPU
 106        #define CPU "UNKNOWN"
 107#endif
 108
 109extern int _stext, _etext, _sdata, _edata, _sbss, _ebss, _end;
 110extern int _ramstart, _ramend;
 111
 112#if defined(CONFIG_UBOOT)
 113/*
 114 * parse_uboot_commandline
 115 *
 116 * Copies u-boot commandline arguments and store them in the proper linux
 117 * variables.
 118 *
 119 * Assumes:
 120 *      _init_sp global contains the address in the stack pointer when the
 121 *      kernel starts (see head.S::_start)
 122 *
 123 *      U-Boot calling convention:
 124 *      (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
 125 *
 126 *      _init_sp can be parsed as such
 127 *
 128 *      _init_sp+00 = u-boot cmd after jsr into kernel (skip)
 129 *      _init_sp+04 = &kernel board_info (residual data)
 130 *      _init_sp+08 = &initrd_start
 131 *      _init_sp+12 = &initrd_end
 132 *      _init_sp+16 = &cmd_start
 133 *      _init_sp+20 = &cmd_end
 134 *
 135 *      This also assumes that the memory locations pointed to are still
 136 *      unmodified. U-boot places them near the end of external SDRAM.
 137 *
 138 * Argument(s):
 139 *      commandp = the linux commandline arg container to fill.
 140 *      size     = the sizeof commandp.
 141 *
 142 * Returns:
 143 */
 144void parse_uboot_commandline(char *commandp, int size)
 145{
 146        extern unsigned long _init_sp;
 147        unsigned long *sp;
 148        unsigned long uboot_kbd;
 149        unsigned long uboot_initrd_start, uboot_initrd_end;
 150        unsigned long uboot_cmd_start, uboot_cmd_end;
 151
 152
 153        sp = (unsigned long *)_init_sp;
 154        uboot_kbd = sp[1];
 155        uboot_initrd_start = sp[2];
 156        uboot_initrd_end = sp[3];
 157        uboot_cmd_start = sp[4];
 158        uboot_cmd_end = sp[5];
 159
 160        if (uboot_cmd_start && uboot_cmd_end)
 161                strncpy(commandp, (const char *)uboot_cmd_start, size);
 162#if defined(CONFIG_BLK_DEV_INITRD)
 163        if (uboot_initrd_start && uboot_initrd_end &&
 164                (uboot_initrd_end > uboot_initrd_start)) {
 165                initrd_start = uboot_initrd_start;
 166                initrd_end = uboot_initrd_end;
 167                ROOT_DEV = Root_RAM0;
 168                printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 169                        initrd_start, initrd_end);
 170        }
 171#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 172}
 173#endif /* #if defined(CONFIG_UBOOT) */
 174
 175void __init setup_arch(char **cmdline_p)
 176{
 177        int bootmap_size;
 178
 179        memory_start = PAGE_ALIGN(_ramstart);
 180        memory_end = _ramend;
 181
 182        init_mm.start_code = (unsigned long) &_stext;
 183        init_mm.end_code = (unsigned long) &_etext;
 184        init_mm.end_data = (unsigned long) &_edata;
 185        init_mm.brk = (unsigned long) 0;
 186
 187        config_BSP(&command_line[0], sizeof(command_line));
 188
 189#if defined(CONFIG_BOOTPARAM)
 190        strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 191        command_line[sizeof(command_line) - 1] = 0;
 192#endif /* CONFIG_BOOTPARAM */
 193
 194#if defined(CONFIG_UBOOT)
 195        /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 196        #if defined(CONFIG_BOOTPARAM)
 197                /* Add the whitespace separator */
 198                command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 199                /* Parse uboot command line into the rest of the buffer */
 200                parse_uboot_commandline(
 201                        &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 202                        (sizeof(command_line) -
 203                        (strlen(CONFIG_BOOTPARAM_STRING)+1)));
 204        /* Only CONFIG_UBOOT defined, create cmdline */
 205        #else
 206                parse_uboot_commandline(&command_line[0], sizeof(command_line));
 207        #endif /* CONFIG_BOOTPARAM */
 208        command_line[sizeof(command_line) - 1] = 0;
 209#endif /* CONFIG_UBOOT */
 210
 211        printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU "\n");
 212
 213#ifdef CONFIG_UCDIMM
 214        printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 215#endif
 216#ifdef CONFIG_M68VZ328
 217        printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 218#endif
 219#ifdef CONFIG_COLDFIRE
 220        printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 221#ifdef CONFIG_M5307
 222        printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 223#endif
 224#ifdef CONFIG_ELITE
 225        printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 226#endif
 227#endif
 228        printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 229
 230#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 231        printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 232#endif
 233#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 234        printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 235#endif
 236#if defined (CONFIG_M68360)
 237        printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
 238        printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
 239#endif
 240#ifdef CONFIG_DRAGEN2
 241        printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 242#endif
 243#ifdef CONFIG_M5235EVB
 244        printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 245#endif
 246
 247        pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
 248                 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
 249                 (int) &_sdata, (int) &_edata,
 250                 (int) &_sbss, (int) &_ebss);
 251        pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
 252                 (int) &_ebss, (int) memory_start,
 253                 (int) memory_start, (int) memory_end);
 254
 255        /* Keep a copy of command line */
 256        *cmdline_p = &command_line[0];
 257        memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 258        boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 259
 260#ifdef DEBUG
 261        if (strlen(*cmdline_p))
 262                printk(KERN_DEBUG "Command line: '%s'\n", *cmdline_p);
 263#endif
 264
 265#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 266        conswitchp = &dummy_con;
 267#endif
 268
 269        /*
 270         * Give all the memory to the bootmap allocator, tell it to put the
 271         * boot mem_map at the start of memory.
 272         */
 273        bootmap_size = init_bootmem_node(
 274                        NODE_DATA(0),
 275                        memory_start >> PAGE_SHIFT, /* map goes here */
 276                        PAGE_OFFSET >> PAGE_SHIFT,      /* 0 on coldfire */
 277                        memory_end >> PAGE_SHIFT);
 278        /*
 279         * Free the usable memory, we have to make sure we do not free
 280         * the bootmem bitmap so we then reserve it after freeing it :-)
 281         */
 282        free_bootmem(memory_start, memory_end - memory_start);
 283        reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 284
 285#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 286        if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 287                        (initrd_end < memory_end))
 288                reserve_bootmem(initrd_start, initrd_end - initrd_start,
 289                                 BOOTMEM_DEFAULT);
 290#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 291
 292        /*
 293         * Get kmalloc into gear.
 294         */
 295        paging_init();
 296}
 297
 298/*
 299 *      Get CPU information for use by the procfs.
 300 */
 301static int show_cpuinfo(struct seq_file *m, void *v)
 302{
 303        char *cpu, *mmu, *fpu;
 304        u_long clockfreq;
 305
 306        cpu = CPU;
 307        mmu = "none";
 308        fpu = "none";
 309
 310#ifdef CONFIG_COLDFIRE
 311        clockfreq = (loops_per_jiffy * HZ) * 3;
 312#else
 313        clockfreq = (loops_per_jiffy * HZ) * 16;
 314#endif
 315
 316        seq_printf(m, "CPU:\t\t%s\n"
 317                      "MMU:\t\t%s\n"
 318                      "FPU:\t\t%s\n"
 319                      "Clocking:\t%lu.%1luMHz\n"
 320                      "BogoMips:\t%lu.%02lu\n"
 321                      "Calibration:\t%lu loops\n",
 322                      cpu, mmu, fpu,
 323                      clockfreq / 1000000,
 324                      (clockfreq / 100000) % 10,
 325                      (loops_per_jiffy * HZ) / 500000,
 326                      ((loops_per_jiffy * HZ) / 5000) % 100,
 327                      (loops_per_jiffy * HZ));
 328
 329        return 0;
 330}
 331
 332static void *c_start(struct seq_file *m, loff_t *pos)
 333{
 334        return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 335}
 336
 337static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 338{
 339        ++*pos;
 340        return c_start(m, pos);
 341}
 342
 343static void c_stop(struct seq_file *m, void *v)
 344{
 345}
 346
 347const struct seq_operations cpuinfo_op = {
 348        .start  = c_start,
 349        .next   = c_next,
 350        .stop   = c_stop,
 351        .show   = show_cpuinfo,
 352};
 353
 354