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 54 /* machine dependent reboot functions */ 55 void (*mach_reset)(void); 56 void (*mach_halt)(void); 57 58 #ifdef CONFIG_M68000 59 #if defined(CONFIG_M68328) 60 #define CPU_NAME "MC68328" 61 #elif defined(CONFIG_M68EZ328) 62 #define CPU_NAME "MC68EZ328" 63 #elif defined(CONFIG_M68VZ328) 64 #define CPU_NAME "MC68VZ328" 65 #else 66 #define CPU_NAME "MC68000" 67 #endif 68 #endif /* CONFIG_M68000 */ 69 #ifndef CPU_NAME 70 #define CPU_NAME "UNKNOWN" 71 #endif 72 73 /* 74 * Different cores have different instruction execution timings. 75 * The old/traditional 68000 cores are basically all the same, at 16. 76 * The ColdFire cores vary a little, their values are defined in their 77 * headers. We default to the standard 68000 value here. 78 */ 79 #ifndef CPU_INSTR_PER_JIFFY 80 #define CPU_INSTR_PER_JIFFY 16 81 #endif 82 83 void __init setup_arch(char **cmdline_p) 84 { 85 memory_start = PAGE_ALIGN(_ramstart); 86 memory_end = _ramend; 87 88 setup_initial_init_mm(_stext, _etext, _edata, NULL); 89 90 config_BSP(&command_line[0], sizeof(command_line)); 91 92 #if defined(CONFIG_BOOTPARAM) 93 strscpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 94 #endif /* CONFIG_BOOTPARAM */ 95 96 process_uboot_commandline(&command_line[0], sizeof(command_line)); 97 98 pr_info("uClinux with CPU " CPU_NAME "\n"); 99 100 #ifdef CONFIG_UCDIMM 101 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n"); 102 #endif 103 #ifdef CONFIG_M68328 104 pr_info("68328 support D. Jeff Dionne <jeff@uclinux.org>\n"); 105 pr_info("68328 support Kenneth Albanowski <kjahds@kjshds.com>\n"); 106 #endif 107 #ifdef CONFIG_M68EZ328 108 pr_info("68EZ328 DragonBallEZ support (C) 1999 Rt-Control, Inc\n"); 109 #endif 110 #ifdef CONFIG_M68VZ328 111 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 112 pr_info("68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n"); 113 #endif 114 #ifdef CONFIG_COLDFIRE 115 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 116 #ifdef CONFIG_M5307 117 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 118 #endif 119 #ifdef CONFIG_ELITE 120 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 121 #endif 122 #endif 123 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 124 125 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 126 pr_info("68328/Pilot support Bernhard Kuhn <kuhn@lpr.e-technik.tu-muenchen.de>\n"); 127 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 128 #endif 129 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 130 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 131 #endif 132 #ifdef CONFIG_DRAGEN2 133 pr_info("DragonEngine II board support by Georges Menie\n"); 134 #endif 135 #ifdef CONFIG_M5235EVB 136 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 137 #endif 138 139 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 140 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 141 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n", 142 __bss_stop, memory_start, memory_start, memory_end); 143 144 memblock_add(_rambase, memory_end - _rambase); 145 memblock_reserve(_rambase, memory_start - _rambase); 146 147 /* Keep a copy of command line */ 148 *cmdline_p = &command_line[0]; 149 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 150 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 151 152 /* 153 * Give all the memory to the bootmap allocator, tell it to put the 154 * boot mem_map at the start of memory. 155 */ 156 min_low_pfn = PFN_DOWN(memory_start); 157 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 158 159 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 160 if ((initrd_start > 0) && (initrd_start < initrd_end) && 161 (initrd_end < memory_end)) 162 memblock_reserve(initrd_start, initrd_end - initrd_start); 163 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 164 165 /* 166 * Get kmalloc into gear. 167 */ 168 paging_init(); 169 } 170 171 /* 172 * Get CPU information for use by the procfs. 173 */ 174 static int show_cpuinfo(struct seq_file *m, void *v) 175 { 176 char *cpu, *mmu, *fpu; 177 u_long clockfreq; 178 179 cpu = CPU_NAME; 180 mmu = "none"; 181 fpu = "none"; 182 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 183 184 seq_printf(m, "CPU:\t\t%s\n" 185 "MMU:\t\t%s\n" 186 "FPU:\t\t%s\n" 187 "Clocking:\t%lu.%1luMHz\n" 188 "BogoMips:\t%lu.%02lu\n" 189 "Calibration:\t%lu loops\n", 190 cpu, mmu, fpu, 191 clockfreq / 1000000, 192 (clockfreq / 100000) % 10, 193 (loops_per_jiffy * HZ) / 500000, 194 ((loops_per_jiffy * HZ) / 5000) % 100, 195 (loops_per_jiffy * HZ)); 196 197 return 0; 198 } 199 200 static void *c_start(struct seq_file *m, loff_t *pos) 201 { 202 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 203 } 204 205 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 206 { 207 ++*pos; 208 return c_start(m, pos); 209 } 210 211 static void c_stop(struct seq_file *m, void *v) 212 { 213 } 214 215 const struct seq_operations cpuinfo_op = { 216 .start = c_start, 217 .next = c_next, 218 .stop = c_stop, 219 .show = show_cpuinfo, 220 }; 221 222