LXR linux/arch/m68k/kernel/setup

   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#include <linux/rtc.h>
  35
  36#include <asm/setup.h>
  37#include <asm/irq.h>
  38#include <asm/machdep.h>
  39#include <asm/pgtable.h>
  40#include <asm/sections.h>
  41
  42unsigned long memory_start;
  43unsigned long memory_end;
  44
  45EXPORT_SYMBOL(memory_start);
  46EXPORT_SYMBOL(memory_end);
  47
  48char __initdata command_line[COMMAND_LINE_SIZE];
  49
  50/* machine dependent timer functions */
  51void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
  52int (*mach_set_clock_mmss)(unsigned long);
  53int (*mach_hwclk) (int, struct rtc_time*);
  54
  55/* machine dependent reboot functions */
  56void (*mach_reset)(void);
  57void (*mach_halt)(void);
  58void (*mach_power_off)(void);
  59
  60#ifdef CONFIG_M68000
  61#define CPU_NAME        "MC68000"
  62#endif
  63#ifdef CONFIG_M68328
  64#define CPU_NAME        "MC68328"
  65#endif
  66#ifdef CONFIG_M68EZ328
  67#define CPU_NAME        "MC68EZ328"
  68#endif
  69#ifdef CONFIG_M68VZ328
  70#define CPU_NAME        "MC68VZ328"
  71#endif
  72#ifdef CONFIG_M68360
  73#define CPU_NAME        "MC68360"
  74#endif
  75#ifndef CPU_NAME
  76#define CPU_NAME        "UNKNOWN"
  77#endif
  78
  79/*
  80 * Different cores have different instruction execution timings.
  81 * The old/traditional 68000 cores are basically all the same, at 16.
  82 * The ColdFire cores vary a little, their values are defined in their
  83 * headers. We default to the standard 68000 value here.
  84 */
  85#ifndef CPU_INSTR_PER_JIFFY
  86#define CPU_INSTR_PER_JIFFY     16
  87#endif
  88
  89#if defined(CONFIG_UBOOT)
  90/*
  91 * parse_uboot_commandline
  92 *
  93 * Copies u-boot commandline arguments and store them in the proper linux
  94 * variables.
  95 *
  96 * Assumes:
  97 *      _init_sp global contains the address in the stack pointer when the
  98 *      kernel starts (see head.S::_start)
  99 *
 100 *      U-Boot calling convention:
 101 *      (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
 102 *
 103 *      _init_sp can be parsed as such
 104 *
 105 *      _init_sp+00 = u-boot cmd after jsr into kernel (skip)
 106 *      _init_sp+04 = &kernel board_info (residual data)
 107 *      _init_sp+08 = &initrd_start
 108 *      _init_sp+12 = &initrd_end
 109 *      _init_sp+16 = &cmd_start
 110 *      _init_sp+20 = &cmd_end
 111 *
 112 *      This also assumes that the memory locations pointed to are still
 113 *      unmodified. U-boot places them near the end of external SDRAM.
 114 *
 115 * Argument(s):
 116 *      commandp = the linux commandline arg container to fill.
 117 *      size     = the sizeof commandp.
 118 *
 119 * Returns:
 120 */
 121void parse_uboot_commandline(char *commandp, int size)
 122{
 123        extern unsigned long _init_sp;
 124        unsigned long *sp;
 125        unsigned long uboot_kbd;
 126        unsigned long uboot_initrd_start, uboot_initrd_end;
 127        unsigned long uboot_cmd_start, uboot_cmd_end;
 128
 129
 130        sp = (unsigned long *)_init_sp;
 131        uboot_kbd = sp[1];
 132        uboot_initrd_start = sp[2];
 133        uboot_initrd_end = sp[3];
 134        uboot_cmd_start = sp[4];
 135        uboot_cmd_end = sp[5];
 136
 137        if (uboot_cmd_start && uboot_cmd_end)
 138                strncpy(commandp, (const char *)uboot_cmd_start, size);
 139#if defined(CONFIG_BLK_DEV_INITRD)
 140        if (uboot_initrd_start && uboot_initrd_end &&
 141                (uboot_initrd_end > uboot_initrd_start)) {
 142                initrd_start = uboot_initrd_start;
 143                initrd_end = uboot_initrd_end;
 144                ROOT_DEV = Root_RAM0;
 145                printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 146                        initrd_start, initrd_end);
 147        }
 148#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 149}
 150#endif /* #if defined(CONFIG_UBOOT) */
 151
 152void __init setup_arch(char **cmdline_p)
 153{
 154        int bootmap_size;
 155
 156        memory_start = PAGE_ALIGN(_ramstart);
 157        memory_end = _ramend;
 158
 159        init_mm.start_code = (unsigned long) &_stext;
 160        init_mm.end_code = (unsigned long) &_etext;
 161        init_mm.end_data = (unsigned long) &_edata;
 162        init_mm.brk = (unsigned long) 0;
 163
 164        config_BSP(&command_line[0], sizeof(command_line));
 165
 166#if defined(CONFIG_BOOTPARAM)
 167        strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 168        command_line[sizeof(command_line) - 1] = 0;
 169#endif /* CONFIG_BOOTPARAM */
 170
 171#if defined(CONFIG_UBOOT)
 172        /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 173        #if defined(CONFIG_BOOTPARAM)
 174                /* Add the whitespace separator */
 175                command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 176                /* Parse uboot command line into the rest of the buffer */
 177                parse_uboot_commandline(
 178                        &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 179                        (sizeof(command_line) -
 180                        (strlen(CONFIG_BOOTPARAM_STRING)+1)));
 181        /* Only CONFIG_UBOOT defined, create cmdline */
 182        #else
 183                parse_uboot_commandline(&command_line[0], sizeof(command_line));
 184        #endif /* CONFIG_BOOTPARAM */
 185        command_line[sizeof(command_line) - 1] = 0;
 186#endif /* CONFIG_UBOOT */
 187
 188        printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
 189
 190#ifdef CONFIG_UCDIMM
 191        printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 192#endif
 193#ifdef CONFIG_M68VZ328
 194        printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 195#endif
 196#ifdef CONFIG_COLDFIRE
 197        printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 198#ifdef CONFIG_M5307
 199        printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 200#endif
 201#ifdef CONFIG_ELITE
 202        printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 203#endif
 204#endif
 205        printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 206
 207#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 208        printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 209#endif
 210#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 211        printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 212#endif
 213#if defined (CONFIG_M68360)
 214        printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
 215        printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
 216#endif
 217#ifdef CONFIG_DRAGEN2
 218        printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 219#endif
 220#ifdef CONFIG_M5235EVB
 221        printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 222#endif
 223
 224        pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 225                 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 226        pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 227                 __bss_stop, memory_start, memory_start, 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 */
 270static 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
 296static void *c_start(struct seq_file *m, loff_t *pos)
 297{
 298        return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 299}
 300
 301static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 302{
 303        ++*pos;
 304        return c_start(m, pos);
 305}
 306
 307static void c_stop(struct seq_file *m, void *v)
 308{
 309}
 310
 311const struct seq_operations cpuinfo_op = {
 312        .start  = c_start,
 313        .next   = c_next,
 314        .stop   = c_stop,
 315        .show   = show_cpuinfo,
 316};
 317
 318