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 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 */ 177 static 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 } 202 203 static void *c_start(struct seq_file *m, loff_t *pos) 204 { 205 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 206 } 207 208 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 209 { 210 ++*pos; 211 return c_start(m, pos); 212 } 213 214 static void c_stop(struct seq_file *m, void *v) 215 { 216 } 217 218 const struct seq_operations cpuinfo_op = { 219 .start = c_start, 220 .next = c_next, 221 .stop = c_stop, 222 .show = show_cpuinfo, 223 }; 224 225