arch/m68k/kernel/setup_no.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  *  linux/arch/m68knommu/kernel/setup.c
   4  *
   5  *  Copyright (C) 1999-2007  Greg Ungerer (gerg@snapgear.com)
   6  *  Copyright (C) 1998,1999  D. Jeff Dionne <jeff@uClinux.org>
   7  *  Copyleft  ()) 2000       James D. Schettine {james@telos-systems.com}
   8  *  Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
   9  *  Copyright (C) 1995       Hamish Macdonald
  10  *  Copyright (C) 2000       Lineo Inc. (www.lineo.com)
  11  *  Copyright (C) 2001       Lineo, Inc. <www.lineo.com>
  12  *
  13  *  68VZ328 Fixes/support    Evan Stawnyczy <e@lineo.ca>
  14  */
  15
  16 /*
  17  * This file handles the architecture-dependent parts of system setup
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/sched.h>
  22 #include <linux/delay.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/fb.h>
  25 #include <linux/module.h>
  26 #include <linux/mm.h>
  27 #include <linux/console.h>
  28 #include <linux/errno.h>
  29 #include <linux/string.h>
  30 #include <linux/bootmem.h>
  31 #include <linux/seq_file.h>
  32 #include <linux/init.h>
  33 #include <linux/initrd.h>
  34 #include <linux/root_dev.h>
  35 #include <linux/rtc.h>
  36
  37 #include <asm/setup.h>
  38 #include <asm/bootinfo.h>
  39 #include <asm/irq.h>
  40 #include <asm/machdep.h>
  41 #include <asm/pgtable.h>
  42 #include <asm/sections.h>
  43
  44 unsigned long memory_start;
  45 unsigned long memory_end;
  46
  47 EXPORT_SYMBOL(memory_start);
  48 EXPORT_SYMBOL(memory_end);
  49
  50 char __initdata command_line[COMMAND_LINE_SIZE];
  51
  52 /* machine dependent timer functions */
  53 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
  54 int (*mach_set_clock_mmss)(unsigned long);
  55 int (*mach_hwclk) (int, struct rtc_time*);
  56
  57 /* machine dependent reboot functions */
  58 void (*mach_reset)(void);
  59 void (*mach_halt)(void);
  60 void (*mach_power_off)(void);
  61
  62 #ifdef CONFIG_M68000
  63 #if defined(CONFIG_M68328)
  64 #define CPU_NAME        "MC68328"
  65 #elif defined(CONFIG_M68EZ328)
  66 #define CPU_NAME        "MC68EZ328"
  67 #elif defined(CONFIG_M68VZ328)
  68 #define CPU_NAME        "MC68VZ328"
  69 #else
  70 #define CPU_NAME        "MC68000"
  71 #endif
  72 #endif /* CONFIG_M68000 */
  73 #ifndef CPU_NAME
  74 #define CPU_NAME        "UNKNOWN"
  75 #endif
  76
  77 /*
  78  * Different cores have different instruction execution timings.
  79  * The old/traditional 68000 cores are basically all the same, at 16.
  80  * The ColdFire cores vary a little, their values are defined in their
  81  * headers. We default to the standard 68000 value here.
  82  */
  83 #ifndef CPU_INSTR_PER_JIFFY
  84 #define CPU_INSTR_PER_JIFFY     16
  85 #endif
  86
  87 void __init setup_arch(char **cmdline_p)
  88 {
  89         int bootmap_size;
  90
  91         memory_start = PAGE_ALIGN(_ramstart);
  92         memory_end = _ramend;
  93
  94         init_mm.start_code = (unsigned long) &_stext;
  95         init_mm.end_code = (unsigned long) &_etext;
  96         init_mm.end_data = (unsigned long) &_edata;
  97         init_mm.brk = (unsigned long) 0;
  98
  99         config_BSP(&command_line[0], sizeof(command_line));
 100
 101 #if defined(CONFIG_BOOTPARAM)
 102         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 103         command_line[sizeof(command_line) - 1] = 0;
 104 #endif /* CONFIG_BOOTPARAM */
 105
 106         process_uboot_commandline(&command_line[0], sizeof(command_line));
 107
 108         pr_info("uClinux with CPU " CPU_NAME "\n");
 109
 110 #ifdef CONFIG_UCDIMM
 111         pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
 112 #endif
 113 #ifdef CONFIG_M68VZ328
 114         pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 115 #endif
 116 #ifdef CONFIG_COLDFIRE
 117         pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 118 #ifdef CONFIG_M5307
 119         pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 120 #endif
 121 #ifdef CONFIG_ELITE
 122         pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 123 #endif
 124 #endif
 125         pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 126
 127 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 128         pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 129 #endif
 130 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 131         pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 132 #endif
 133 #ifdef CONFIG_DRAGEN2
 134         pr_info("DragonEngine II board support by Georges Menie\n");
 135 #endif
 136 #ifdef CONFIG_M5235EVB
 137         pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 138 #endif
 139
 140         pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 141                  _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 142         pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 143                  __bss_stop, memory_start, memory_start, memory_end);
 144
 145         /* Keep a copy of command line */
 146         *cmdline_p = &command_line[0];
 147         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 148         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 149
 150 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 151         conswitchp = &dummy_con;
 152 #endif
 153
 154         /*
 155          * Give all the memory to the bootmap allocator, tell it to put the
 156          * boot mem_map at the start of memory.
 157          */
 158         min_low_pfn = PFN_DOWN(memory_start);
 159         max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 160
 161         bootmap_size = init_bootmem_node(
 162                         NODE_DATA(0),
 163                         min_low_pfn,            /* map goes here */
 164                         PFN_DOWN(PAGE_OFFSET),
 165                         max_pfn);
 166         /*
 167          * Free the usable memory, we have to make sure we do not free
 168          * the bootmem bitmap so we then reserve it after freeing it :-)
 169          */
 170         free_bootmem(memory_start, memory_end - memory_start);
 171         reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);
 172
 173 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 174         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 175                         (initrd_end < memory_end))
 176                 reserve_bootmem(initrd_start, initrd_end - initrd_start,
 177                                  BOOTMEM_DEFAULT);
 178 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 179
 180         /*
 181          * Get kmalloc into gear.
 182          */
 183         paging_init();
 184 }
 185
 186 /*
 187  *      Get CPU information for use by the procfs.
 188  */
 189 static int show_cpuinfo(struct seq_file *m, void *v)
 190 {
 191         char *cpu, *mmu, *fpu;
 192         u_long clockfreq;
 193
 194         cpu = CPU_NAME;
 195         mmu = "none";
 196         fpu = "none";
 197         clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 198
 199         seq_printf(m, "CPU:\t\t%s\n"
 200                       "MMU:\t\t%s\n"
 201                       "FPU:\t\t%s\n"
 202                       "Clocking:\t%lu.%1luMHz\n"
 203                       "BogoMips:\t%lu.%02lu\n"
 204                       "Calibration:\t%lu loops\n",
 205                       cpu, mmu, fpu,
 206                       clockfreq / 1000000,
 207                       (clockfreq / 100000) % 10,
 208                       (loops_per_jiffy * HZ) / 500000,
 209                       ((loops_per_jiffy * HZ) / 5000) % 100,
 210                       (loops_per_jiffy * HZ));
 211
 212         return 0;
 213 }
 214
 215 static void *c_start(struct seq_file *m, loff_t *pos)
 216 {
 217         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 218 }
 219
 220 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 221 {
 222         ++*pos;
 223         return c_start(m, pos);
 224 }
 225
 226 static void c_stop(struct seq_file *m, void *v)
 227 {
 228 }
 229
 230 const struct seq_operations cpuinfo_op = {
 231         .start  = c_start,
 232         .next   = c_next,
 233         .stop   = c_stop,
 234         .show   = show_cpuinfo,
 235 };
 236