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/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
  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)(void) __initdata = NULL;
  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 void __init setup_arch(char **cmdline_p)
  86 {
  87         memory_start = PAGE_ALIGN(_ramstart);
  88         memory_end = _ramend;
  89
  90         init_mm.start_code = (unsigned long) &_stext;
  91         init_mm.end_code = (unsigned long) &_etext;
  92         init_mm.end_data = (unsigned long) &_edata;
  93         init_mm.brk = (unsigned long) 0;
  94
  95         config_BSP(&command_line[0], sizeof(command_line));
  96
  97 #if defined(CONFIG_BOOTPARAM)
  98         strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
  99         command_line[sizeof(command_line) - 1] = 0;
 100 #endif /* CONFIG_BOOTPARAM */
 101
 102         process_uboot_commandline(&command_line[0], sizeof(command_line));
 103
 104         pr_info("uClinux with CPU " CPU_NAME "\n");
 105
 106 #ifdef CONFIG_UCDIMM
 107         pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n");
 108 #endif
 109 #ifdef CONFIG_M68328
 110         pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n");
 111         pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n");
 112 #endif
 113 #ifdef CONFIG_M68EZ328
 114         pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n");
 115 #endif
 116 #ifdef CONFIG_M68VZ328
 117         pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 118         pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");
 119 #endif
 120 #ifdef CONFIG_COLDFIRE
 121         pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 122 #ifdef CONFIG_M5307
 123         pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 124 #endif
 125 #ifdef CONFIG_ELITE
 126         pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 127 #endif
 128 #endif
 129         pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");
 130
 131 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 132         pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n");
 133         pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 134 #endif
 135 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 136         pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 137 #endif
 138 #ifdef CONFIG_DRAGEN2
 139         pr_info("DragonEngine II board support by Georges Menie\n");
 140 #endif
 141 #ifdef CONFIG_M5235EVB
 142         pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 143 #endif
 144
 145         pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n",
 146                  _stext, _etext, _sdata, _edata, __bss_start, __bss_stop);
 147         pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ",
 148                  __bss_stop, memory_start, memory_start, memory_end);
 149
 150         memblock_add(_rambase, memory_end - _rambase);
 151         memblock_reserve(_rambase, memory_start - _rambase);
 152
 153         /* Keep a copy of command line */
 154         *cmdline_p = &command_line[0];
 155         memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 156         boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 157
 158         /*
 159          * Give all the memory to the bootmap allocator, tell it to put the
 160          * boot mem_map at the start of memory.
 161          */
 162         min_low_pfn = PFN_DOWN(memory_start);
 163         max_pfn = max_low_pfn = PFN_DOWN(memory_end);
 164
 165 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 166         if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 167                         (initrd_end < memory_end))
 168                 memblock_reserve(initrd_start, initrd_end - initrd_start);
 169 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 170
 171         /*
 172          * Get kmalloc into gear.
 173          */
 174         paging_init();
 175 }
 176
 177 /*
 178  *      Get CPU information for use by the procfs.
 179  */
 180 static int show_cpuinfo(struct seq_file *m, void *v)
 181 {
 182         char *cpu, *mmu, *fpu;
 183         u_long clockfreq;
 184
 185         cpu = CPU_NAME;
 186         mmu = "none";
 187         fpu = "none";
 188         clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;
 189
 190         seq_printf(m, "CPU:\t\t%s\n"
 191                       "MMU:\t\t%s\n"
 192                       "FPU:\t\t%s\n"
 193                       "Clocking:\t%lu.%1luMHz\n"
 194                       "BogoMips:\t%lu.%02lu\n"
 195                       "Calibration:\t%lu loops\n",
 196                       cpu, mmu, fpu,
 197                       clockfreq / 1000000,
 198                       (clockfreq / 100000) % 10,
 199                       (loops_per_jiffy * HZ) / 500000,
 200                       ((loops_per_jiffy * HZ) / 5000) % 100,
 201                       (loops_per_jiffy * HZ));
 202
 203         return 0;
 204 }
 205
 206 static void *c_start(struct seq_file *m, loff_t *pos)
 207 {
 208         return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 209 }
 210
 211 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 212 {
 213         ++*pos;
 214         return c_start(m, pos);
 215 }
 216
 217 static void c_stop(struct seq_file *m, void *v)
 218 {
 219 }
 220
 221 const struct seq_operations cpuinfo_op = {
 222         .start  = c_start,
 223         .next   = c_next,
 224         .stop   = c_stop,
 225         .show   = show_cpuinfo,
 226 };
 227