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/bootinfo.h>
  38 #include <asm/irq.h>
  39 #include <asm/machdep.h>
  40 #include <asm/pgtable.h>
  41 #include <asm/sections.h>
  42
  43 unsigned long memory_start;
  44 unsigned long memory_end;
  45
  46 EXPORT_SYMBOL(memory_start);
  47 EXPORT_SYMBOL(memory_end);
  48
  49 char __initdata command_line[COMMAND_LINE_SIZE];
  50
  51 /* machine dependent timer functions */
  52 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
  53 int (*mach_set_clock_mmss)(unsigned long);
  54 int (*mach_hwclk) (int, struct rtc_time*);
  55
  56 /* machine dependent reboot functions */
  57 void (*mach_reset)(void);
  58 void (*mach_halt)(void);
  59 void (*mach_power_off)(void);
  60
  61 #ifdef CONFIG_M68000
  62 #if defined(CONFIG_M68328)
  63 #define CPU_NAME        "MC68328"
  64 #elif defined(CONFIG_M68EZ328)
  65 #define CPU_NAME        "MC68EZ328"
  66 #elif defined(CONFIG_M68VZ328)
  67 #define CPU_NAME        "MC68VZ328"
  68 #else
  69 #define CPU_NAME        "MC68000"
  70 #endif
  71 #endif /* CONFIG_M68000 */
  72 #ifndef CPU_NAME
  73 #define CPU_NAME        "UNKNOWN"
  74 #endif
  75
  76 /*
  77  * Different cores have different instruction execution timings.
  78  * The old/traditional 68000 cores are basically all the same, at 16.
  79  * The ColdFire cores vary a little, their values are defined in their
  80  * headers. We default to the standard 68000 value here.
  81  */
  82 #ifndef CPU_INSTR_PER_JIFFY
  83 #define CPU_INSTR_PER_JIFFY     16
  84 #endif
  85
  86 void __init setup_arch(char **cmdline_p)
  87 {
  88         int bootmap_size;
  89
  90         memory_start = PAGE_ALIGN(_ramstart);
  91         memory_end = _ramend;
  92
  93         init_mm.start_code = (unsigned long) &_stext;
  94         init_mm.end_code = (unsigned long) &_etext;
  95         init_mm.end_data = (unsigned long) &_edata;
  96         init_mm.brk = (unsigned long) 0;
  97
  98         config_BSP(&command_line[0], sizeof(command_line));
  99
 100 #if defined(CONFIG_BOOTPARAM)
 101         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 102         command_line[sizeof(command_line) - 1] = 0;
 103 #endif /* CONFIG_BOOTPARAM */
 104
 105         process_uboot_commandline(&command_line[0], sizeof(command_line));
 106
 107         pr_info("uClinux with CPU " CPU_NAME "\n");
 108
 109 #ifdef CONFIG_UCDIMM
 110         pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
 111 #endif
 112 #ifdef CONFIG_M68VZ328
 113         pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 114 #endif
 115 #ifdef CONFIG_COLDFIRE
 116         pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 117 #ifdef CONFIG_M5307
 118         pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 119 #endif
 120 #ifdef CONFIG_ELITE
 121         pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 122 #endif
 123 #endif
 124         pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 125
 126 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 127         pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 128 #endif
 129 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 130         pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 131 #endif
 132 #ifdef CONFIG_DRAGEN2
 133         pr_info("DragonEngine II board support by Georges Menie\n");
 134 #endif
 135 #ifdef CONFIG_M5235EVB
 136         pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 137 #endif
 138
 139         pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 140                  _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 141         pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 142                  __bss_stop, memory_start, memory_start, memory_end);
 143
 144         /* Keep a copy of command line */
 145         *cmdline_p = &command_line[0];
 146         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 147         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 148
 149 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 150         conswitchp = &dummy_con;
 151 #endif
 152
 153         /*
 154          * Give all the memory to the bootmap allocator, tell it to put the
 155          * boot mem_map at the start of memory.
 156          */
 157         min_low_pfn = PFN_DOWN(memory_start);
 158         max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 159
 160         bootmap_size = init_bootmem_node(
 161                         NODE_DATA(0),
 162                         min_low_pfn,            /* map goes here */
 163                         PFN_DOWN(PAGE_OFFSET),
 164                         max_pfn);
 165         /*
 166          * Free the usable memory, we have to make sure we do not free
 167          * the bootmem bitmap so we then reserve it after freeing it :-)
 168          */
 169         free_bootmem(memory_start, memory_end - memory_start);
 170         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 171
 172 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 173         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 174                         (initrd_end < memory_end))
 175                 reserve_bootmem(initrd_start, initrd_end - initrd_start,
 176                                  BOOTMEM_DEFAULT);
 177 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 178
 179         /*
 180          * Get kmalloc into gear.
 181          */
 182         paging_init();
 183 }
 184
 185 /*
 186  *      Get CPU information for use by the procfs.
 187  */
 188 static int show_cpuinfo(struct seq_file *m, void *v)
 189 {
 190         char *cpu, *mmu, *fpu;
 191         u_long clockfreq;
 192
 193         cpu = CPU_NAME;
 194         mmu = "none";
 195         fpu = "none";
 196         clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 197
 198         seq_printf(m, "CPU:\t\t%s\n"
 199                       "MMU:\t\t%s\n"
 200                       "FPU:\t\t%s\n"
 201                       "Clocking:\t%lu.%1luMHz\n"
 202                       "BogoMips:\t%lu.%02lu\n"
 203                       "Calibration:\t%lu loops\n",
 204                       cpu, mmu, fpu,
 205                       clockfreq / 1000000,
 206                       (clockfreq / 100000) % 10,
 207                       (loops_per_jiffy * HZ) / 500000,
 208                       ((loops_per_jiffy * HZ) / 5000) % 100,
 209                       (loops_per_jiffy * HZ));
 210
 211         return 0;
 212 }
 213
 214 static void *c_start(struct seq_file *m, loff_t *pos)
 215 {
 216         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 217 }
 218
 219 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 220 {
 221         ++*pos;
 222         return c_start(m, pos);
 223 }
 224
 225 static void c_stop(struct seq_file *m, void *v)
 226 {
 227 }
 228
 229 const struct seq_operations cpuinfo_op = {
 230         .start  = c_start,
 231         .next   = c_next,
 232         .stop   = c_stop,
 233         .show   = show_cpuinfo,
 234 };
 235