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 #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
  42 unsigned long memory_start;
  43 unsigned long memory_end;
  44
  45 EXPORT_SYMBOL(memory_start);
  46 EXPORT_SYMBOL(memory_end);
  47
  48 char __initdata command_line[COMMAND_LINE_SIZE];
  49
  50 /* machine dependent timer functions */
  51 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
  52 int (*mach_set_clock_mmss)(unsigned long);
  53 int (*mach_hwclk) (int, struct rtc_time*);
  54
  55 /* machine dependent reboot functions */
  56 void (*mach_reset)(void);
  57 void (*mach_halt)(void);
  58 void (*mach_power_off)(void);
  59
  60 #ifdef CONFIG_M68000
  61 #if defined(CONFIG_M68328)
  62 #define CPU_NAME        "MC68328"
  63 #elif defined(CONFIG_M68EZ328)
  64 #define CPU_NAME        "MC68EZ328"
  65 #elif defined(CONFIG_M68VZ328)
  66 #define CPU_NAME        "MC68VZ328"
  67 #else
  68 #define CPU_NAME        "MC68000"
  69 #endif
  70 #endif /* CONFIG_M68000 */
  71 #ifndef CPU_NAME
  72 #define CPU_NAME        "UNKNOWN"
  73 #endif
  74
  75 /*
  76  * Different cores have different instruction execution timings.
  77  * The old/traditional 68000 cores are basically all the same, at 16.
  78  * The ColdFire cores vary a little, their values are defined in their
  79  * headers. We default to the standard 68000 value here.
  80  */
  81 #ifndef CPU_INSTR_PER_JIFFY
  82 #define CPU_INSTR_PER_JIFFY     16
  83 #endif
  84
  85 #if defined(CONFIG_UBOOT)
  86 /*
  87  * parse_uboot_commandline
  88  *
  89  * Copies u-boot commandline arguments and store them in the proper linux
  90  * variables.
  91  *
  92  * Assumes:
  93  *      _init_sp global contains the address in the stack pointer when the
  94  *      kernel starts (see head.S::_start)
  95  *
  96  *      U-Boot calling convention:
  97  *      (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
  98  *
  99  *      _init_sp can be parsed as such
 100  *
 101  *      _init_sp+00 = u-boot cmd after jsr into kernel (skip)
 102  *      _init_sp+04 = &kernel board_info (residual data)
 103  *      _init_sp+08 = &initrd_start
 104  *      _init_sp+12 = &initrd_end
 105  *      _init_sp+16 = &cmd_start
 106  *      _init_sp+20 = &cmd_end
 107  *
 108  *      This also assumes that the memory locations pointed to are still
 109  *      unmodified. U-boot places them near the end of external SDRAM.
 110  *
 111  * Argument(s):
 112  *      commandp = the linux commandline arg container to fill.
 113  *      size     = the sizeof commandp.
 114  *
 115  * Returns:
 116  */
 117 static void __init parse_uboot_commandline(char *commandp, int size)
 118 {
 119         extern unsigned long _init_sp;
 120         unsigned long *sp;
 121         unsigned long uboot_kbd;
 122         unsigned long uboot_initrd_start, uboot_initrd_end;
 123         unsigned long uboot_cmd_start, uboot_cmd_end;
 124
 125
 126         sp = (unsigned long *)_init_sp;
 127         uboot_kbd = sp[1];
 128         uboot_initrd_start = sp[2];
 129         uboot_initrd_end = sp[3];
 130         uboot_cmd_start = sp[4];
 131         uboot_cmd_end = sp[5];
 132
 133         if (uboot_cmd_start && uboot_cmd_end)
 134                 strncpy(commandp, (const char *)uboot_cmd_start, size);
 135 #if defined(CONFIG_BLK_DEV_INITRD)
 136         if (uboot_initrd_start && uboot_initrd_end &&
 137                 (uboot_initrd_end > uboot_initrd_start)) {
 138                 initrd_start = uboot_initrd_start;
 139                 initrd_end = uboot_initrd_end;
 140                 ROOT_DEV = Root_RAM0;
 141                 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 142                         initrd_start, initrd_end);
 143         }
 144 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 145 }
 146 #endif /* #if defined(CONFIG_UBOOT) */
 147
 148 void __init setup_arch(char **cmdline_p)
 149 {
 150         int bootmap_size;
 151
 152         memory_start = PAGE_ALIGN(_ramstart);
 153         memory_end = _ramend;
 154
 155         init_mm.start_code = (unsigned long) &_stext;
 156         init_mm.end_code = (unsigned long) &_etext;
 157         init_mm.end_data = (unsigned long) &_edata;
 158         init_mm.brk = (unsigned long) 0;
 159
 160         config_BSP(&command_line[0], sizeof(command_line));
 161
 162 #if defined(CONFIG_BOOTPARAM)
 163         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 164         command_line[sizeof(command_line) - 1] = 0;
 165 #endif /* CONFIG_BOOTPARAM */
 166
 167 #if defined(CONFIG_UBOOT)
 168         /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 169         #if defined(CONFIG_BOOTPARAM)
 170                 /* Add the whitespace separator */
 171                 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 172                 /* Parse uboot command line into the rest of the buffer */
 173                 parse_uboot_commandline(
 174                         &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 175                         (sizeof(command_line) -
 176                         (strlen(CONFIG_BOOTPARAM_STRING)+1)));
 177         /* Only CONFIG_UBOOT defined, create cmdline */
 178         #else
 179                 parse_uboot_commandline(&command_line[0], sizeof(command_line));
 180         #endif /* CONFIG_BOOTPARAM */
 181         command_line[sizeof(command_line) - 1] = 0;
 182 #endif /* CONFIG_UBOOT */
 183
 184         printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");
 185
 186 #ifdef CONFIG_UCDIMM
 187         printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 188 #endif
 189 #ifdef CONFIG_M68VZ328
 190         printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 191 #endif
 192 #ifdef CONFIG_COLDFIRE
 193         printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 194 #ifdef CONFIG_M5307
 195         printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 196 #endif
 197 #ifdef CONFIG_ELITE
 198         printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 199 #endif
 200 #endif
 201         printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 202
 203 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 204         printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 205 #endif
 206 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 207         printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 208 #endif
 209 #ifdef CONFIG_DRAGEN2
 210         printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 211 #endif
 212 #ifdef CONFIG_M5235EVB
 213         printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 214 #endif
 215
 216         pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 217                  _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 218         pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 219                  __bss_stop, memory_start, memory_start, memory_end);
 220
 221         /* Keep a copy of command line */
 222         *cmdline_p = &command_line[0];
 223         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 224         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 225
 226 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 227         conswitchp = &dummy_con;
 228 #endif
 229
 230         /*
 231          * Give all the memory to the bootmap allocator, tell it to put the
 232          * boot mem_map at the start of memory.
 233          */
 234         min_low_pfn = PFN_DOWN(memory_start);
 235         max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 236
 237         bootmap_size = init_bootmem_node(
 238                         NODE_DATA(0),
 239                         min_low_pfn,            /* map goes here */
 240                         PFN_DOWN(PAGE_OFFSET),
 241                         max_pfn);
 242         /*
 243          * Free the usable memory, we have to make sure we do not free
 244          * the bootmem bitmap so we then reserve it after freeing it :-)
 245          */
 246         free_bootmem(memory_start, memory_end - memory_start);
 247         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 248
 249 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 250         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 251                         (initrd_end < memory_end))
 252                 reserve_bootmem(initrd_start, initrd_end - initrd_start,
 253                                  BOOTMEM_DEFAULT);
 254 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 255
 256         /*
 257          * Get kmalloc into gear.
 258          */
 259         paging_init();
 260 }
 261
 262 /*
 263  *      Get CPU information for use by the procfs.
 264  */
 265 static int show_cpuinfo(struct seq_file *m, void *v)
 266 {
 267         char *cpu, *mmu, *fpu;
 268         u_long clockfreq;
 269
 270         cpu = CPU_NAME;
 271         mmu = "none";
 272         fpu = "none";
 273         clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 274
 275         seq_printf(m, "CPU:\t\t%s\n"
 276                       "MMU:\t\t%s\n"
 277                       "FPU:\t\t%s\n"
 278                       "Clocking:\t%lu.%1luMHz\n"
 279                       "BogoMips:\t%lu.%02lu\n"
 280                       "Calibration:\t%lu loops\n",
 281                       cpu, mmu, fpu,
 282                       clockfreq / 1000000,
 283                       (clockfreq / 100000) % 10,
 284                       (loops_per_jiffy * HZ) / 500000,
 285                       ((loops_per_jiffy * HZ) / 5000) % 100,
 286                       (loops_per_jiffy * HZ));
 287
 288         return 0;
 289 }
 290
 291 static void *c_start(struct seq_file *m, loff_t *pos)
 292 {
 293         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 294 }
 295
 296 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 297 {
 298         ++*pos;
 299         return c_start(m, pos);
 300 }
 301
 302 static void c_stop(struct seq_file *m, void *v)
 303 {
 304 }
 305
 306 const struct seq_operations cpuinfo_op = {
 307         .start  = c_start,
 308         .next   = c_next,
 309         .stop   = c_stop,
 310         .show   = show_cpuinfo,
 311 };
 312