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/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/memblock.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/sections.h> 41 42 unsigned long memory_start; 43 unsigned long memory_end; 44 45 EXPORT_SYMBOL(memory_start); 46 EXPORT_SYMBOL(memory_end); 47 48 char __initdata command_line[COMMAND_LINE_SIZE]; 49 50 /* machine dependent timer functions */ 51 void (*mach_sched_init)(void) __initdata = NULL; 52 53 /* machine dependent reboot functions */ 54 void (*mach_reset)(void); 55 void (*mach_halt)(void); 56 57 #ifdef CONFIG_M68000 58 #if defined(CONFIG_M68328) 59 #define CPU_NAME "MC68328" 60 #elif defined(CONFIG_M68EZ328) 61 #define CPU_NAME "MC68EZ328" 62 #elif defined(CONFIG_M68VZ328) 63 #define CPU_NAME "MC68VZ328" 64 #else 65 #define CPU_NAME "MC68000" 66 #endif 67 #endif /* CONFIG_M68000 */ 68 #ifndef CPU_NAME 69 #define CPU_NAME "UNKNOWN" 70 #endif 71 72 /* 73 * Different cores have different instruction execution timings. 74 * The old/traditional 68000 cores are basically all the same, at 16. 75 * The ColdFire cores vary a little, their values are defined in their 76 * headers. We default to the standard 68000 value here. 77 */ 78 #ifndef CPU_INSTR_PER_JIFFY 79 #define CPU_INSTR_PER_JIFFY 16 80 #endif 81 82 void __init setup_arch(char **cmdline_p) 83 { 84 memory_start = PAGE_ALIGN(_ramstart); 85 memory_end = _ramend; 86 87 setup_initial_init_mm(_stext, _etext, _edata, NULL); 88 89 config_BSP(&command_line[0], sizeof(command_line)); 90 91 #if defined(CONFIG_BOOTPARAM) 92 strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 93 #endif /* CONFIG_BOOTPARAM */ 94 95 process_uboot_commandline(&command_line[0], sizeof(command_line)); 96 97 pr_info("uClinux with CPU " CPU_NAME "\n"); 98 99 #ifdef CONFIG_UCDIMM 100 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n"); 101 #endif 102 #ifdef CONFIG_M68328 103 pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n"); 104 pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n"); 105 #endif 106 #ifdef CONFIG_M68EZ328 107 pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n"); 108 #endif 109 #ifdef CONFIG_M68VZ328 110 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 111 pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n"); 112 #endif 113 #ifdef CONFIG_COLDFIRE 114 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 115 #ifdef CONFIG_M5307 116 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 117 #endif 118 #ifdef CONFIG_ELITE 119 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 120 #endif 121 #endif 122 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 123 124 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 125 pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n"); 126 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 127 #endif 128 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 129 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 130 #endif 131 #ifdef CONFIG_DRAGEN2 132 pr_info("DragonEngine II board support by Georges Menie\n"); 133 #endif 134 #ifdef CONFIG_M5235EVB 135 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 136 #endif 137 138 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 139 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 140 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n", 141 __bss_stop, memory_start, memory_start, memory_end); 142 143 memblock_add(_rambase, memory_end - _rambase); 144 memblock_reserve(_rambase, memory_start - _rambase); 145 146 /* Keep a copy of command line */ 147 *cmdline_p = &command_line[0]; 148 strscpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 149 150 /* 151 * Give all the memory to the bootmap allocator, tell it to put the 152 * boot mem_map at the start of memory. 153 */ 154 min_low_pfn = PFN_DOWN(memory_start); 155 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 156 157 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 158 if ((initrd_start > 0) && (initrd_start < initrd_end) && 159 (initrd_end < memory_end)) 160 memblock_reserve(initrd_start, initrd_end - initrd_start); 161 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 162 163 /* 164 * Get kmalloc into gear. 165 */ 166 paging_init(); 167 } 168 169 /* 170 * Get CPU information for use by the procfs. 171 */ 172 static int show_cpuinfo(struct seq_file *m, void *v) 173 { 174 char *cpu, *mmu, *fpu; 175 u_long clockfreq; 176 177 cpu = CPU_NAME; 178 mmu = "none"; 179 fpu = "none"; 180 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 181 182 seq_printf(m, "CPU:\t\t%s\n" 183 "MMU:\t\t%s\n" 184 "FPU:\t\t%s\n" 185 "Clocking:\t%lu.%1luMHz\n" 186 "BogoMips:\t%lu.%02lu\n" 187 "Calibration:\t%lu loops\n", 188 cpu, mmu, fpu, 189 clockfreq / 1000000, 190 (clockfreq / 100000) % 10, 191 (loops_per_jiffy * HZ) / 500000, 192 ((loops_per_jiffy * HZ) / 5000) % 100, 193 (loops_per_jiffy * HZ)); 194 195 return 0; 196 } 197 198 static void *c_start(struct seq_file *m, loff_t *pos) 199 { 200 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 201 } 202 203 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 204 { 205 ++*pos; 206 return c_start(m, pos); 207 } 208 209 static void c_stop(struct seq_file *m, void *v) 210 { 211 } 212 213 const struct seq_operations cpuinfo_op = { 214 .start = c_start, 215 .next = c_next, 216 .stop = c_stop, 217 .show = show_cpuinfo, 218 }; 219 220