LXR linux/arch/m68k/kernel/setup

   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/memblock.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
  44unsigned long memory_start;
  45unsigned long memory_end;
  46
  47EXPORT_SYMBOL(memory_start);
  48EXPORT_SYMBOL(memory_end);
  49
  50char __initdata command_line[COMMAND_LINE_SIZE];
  51
  52/* machine dependent timer functions */
  53void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
  54int (*mach_set_clock_mmss)(unsigned long);
  55int (*mach_hwclk) (int, struct rtc_time*);
  56
  57/* machine dependent reboot functions */
  58void (*mach_reset)(void);
  59void (*mach_halt)(void);
  60void (*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
  87void __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 */
 189static 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
 215static void *c_start(struct seq_file *m, loff_t *pos)
 216{
 217        return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 218}
 219
 220static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 221{
 222        ++*pos;
 223        return c_start(m, pos);
 224}
 225
 226static void c_stop(struct seq_file *m, void *v)
 227{
 228}
 229
 230const struct seq_operations cpuinfo_op = {
 231        .start  = c_start,
 232        .next   = c_next,
 233        .stop   = c_stop,
 234        .show   = show_cpuinfo,
 235};
 236
 237