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/sections.h>
  42
  43unsigned long memory_start;
  44unsigned long memory_end;
  45
  46EXPORT_SYMBOL(memory_start);
  47EXPORT_SYMBOL(memory_end);
  48
  49char __initdata command_line[COMMAND_LINE_SIZE];
  50
  51/* machine dependent timer functions */
  52void (*mach_sched_init)(void) __initdata = NULL;
  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#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
  85void __init setup_arch(char **cmdline_p)
  86{
  87        memory_start = PAGE_ALIGN(_ramstart);
  88        memory_end = _ramend;
  89
  90        setup_initial_init_mm(_stext, _etext, _edata, NULL);
  91
  92        config_BSP(&command_line[0], sizeof(command_line));
  93
  94#if defined(CONFIG_BOOTPARAM)
  95        strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
  96        command_line[sizeof(command_line) - 1] = 0;
  97#endif /* CONFIG_BOOTPARAM */
  98
  99        process_uboot_commandline(&command_line[0], sizeof(command_line));
 100
 101        pr_info("uClinux with CPU " CPU_NAME "\n");
 102
 103#ifdef CONFIG_UCDIMM
 104        pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
 105#endif
 106#ifdef CONFIG_M68328
 107        pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n");
 108        pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n");
 109#endif
 110#ifdef CONFIG_M68EZ328
 111        pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n");
 112#endif
 113#ifdef CONFIG_M68VZ328
 114        pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 115        pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
 116#endif
 117#ifdef CONFIG_COLDFIRE
 118        pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 119#ifdef CONFIG_M5307
 120        pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 121#endif
 122#ifdef CONFIG_ELITE
 123        pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 124#endif
 125#endif
 126        pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 127
 128#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 129        pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n");
 130        pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 131#endif
 132#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 133        pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 134#endif
 135#ifdef CONFIG_DRAGEN2
 136        pr_info("DragonEngine II board support by Georges Menie\n");
 137#endif
 138#ifdef CONFIG_M5235EVB
 139        pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 140#endif
 141
 142        pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 143                 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 144        pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 145                 __bss_stop, memory_start, memory_start, memory_end);
 146
 147        memblock_add(_rambase, memory_end - _rambase);
 148        memblock_reserve(_rambase, memory_start - _rambase);
 149
 150        /* Keep a copy of command line */
 151        *cmdline_p = &command_line[0];
 152        memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 153        boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 154
 155        /*
 156         * Give all the memory to the bootmap allocator, tell it to put the
 157         * boot mem_map at the start of memory.
 158         */
 159        min_low_pfn = PFN_DOWN(memory_start);
 160        max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 161
 162#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 163        if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 164                        (initrd_end < memory_end))
 165                memblock_reserve(initrd_start, initrd_end - initrd_start);
 166#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 167
 168        /*
 169         * Get kmalloc into gear.
 170         */
 171        paging_init();
 172}
 173
 174/*
 175 *      Get CPU information for use by the procfs.
 176 */
 177static int show_cpuinfo(struct seq_file *m, void *v)
 178{
 179        char *cpu, *mmu, *fpu;
 180        u_long clockfreq;
 181
 182        cpu = CPU_NAME;
 183        mmu = "none";
 184        fpu = "none";
 185        clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 186
 187        seq_printf(m, "CPU:\t\t%s\n"
 188                      "MMU:\t\t%s\n"
 189                      "FPU:\t\t%s\n"
 190                      "Clocking:\t%lu.%1luMHz\n"
 191                      "BogoMips:\t%lu.%02lu\n"
 192                      "Calibration:\t%lu loops\n",
 193                      cpu, mmu, fpu,
 194                      clockfreq / 1000000,
 195                      (clockfreq / 100000) % 10,
 196                      (loops_per_jiffy * HZ) / 500000,
 197                      ((loops_per_jiffy * HZ) / 5000) % 100,
 198                      (loops_per_jiffy * HZ));
 199
 200        return 0;
 201}
 202
 203static void *c_start(struct seq_file *m, loff_t *pos)
 204{
 205        return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 206}
 207
 208static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 209{
 210        ++*pos;
 211        return c_start(m, pos);
 212}
 213
 214static void c_stop(struct seq_file *m, void *v)
 215{
 216}
 217
 218const struct seq_operations cpuinfo_op = {
 219        .start  = c_start,
 220        .next   = c_next,
 221        .stop   = c_stop,
 222        .show   = show_cpuinfo,
 223};
 224
 225