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)(irq_handler_t handler) __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_M68VZ328 110 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 111 #endif 112 #ifdef CONFIG_COLDFIRE 113 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 114 #ifdef CONFIG_M5307 115 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 116 #endif 117 #ifdef CONFIG_ELITE 118 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 119 #endif 120 #endif 121 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 122 123 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 124 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 125 #endif 126 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 127 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 128 #endif 129 #ifdef CONFIG_DRAGEN2 130 pr_info("DragonEngine II board support by Georges Menie\n"); 131 #endif 132 #ifdef CONFIG_M5235EVB 133 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 134 #endif 135 136 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 137 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 138 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", 139 __bss_stop, memory_start, memory_start, memory_end); 140 141 memblock_add(memory_start, memory_end - memory_start); 142 143 /* Keep a copy of command line */ 144 *cmdline_p = &command_line[0]; 145 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 146 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 147 148 /* 149 * Give all the memory to the bootmap allocator, tell it to put the 150 * boot mem_map at the start of memory. 151 */ 152 min_low_pfn = PFN_DOWN(memory_start); 153 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 154 155 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 156 if ((initrd_start > 0) && (initrd_start < initrd_end) && 157 (initrd_end < memory_end)) 158 memblock_reserve(initrd_start, initrd_end - initrd_start); 159 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 160 161 /* 162 * Get kmalloc into gear. 163 */ 164 paging_init(); 165 } 166 167 /* 168 * Get CPU information for use by the procfs. 169 */ 170 static int show_cpuinfo(struct seq_file *m, void *v) 171 { 172 char *cpu, *mmu, *fpu; 173 u_long clockfreq; 174 175 cpu = CPU_NAME; 176 mmu = "none"; 177 fpu = "none"; 178 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 179 180 seq_printf(m, "CPU:\t\t%s\n" 181 "MMU:\t\t%s\n" 182 "FPU:\t\t%s\n" 183 "Clocking:\t%lu.%1luMHz\n" 184 "BogoMips:\t%lu.%02lu\n" 185 "Calibration:\t%lu loops\n", 186 cpu, mmu, fpu, 187 clockfreq / 1000000, 188 (clockfreq / 100000) % 10, 189 (loops_per_jiffy * HZ) / 500000, 190 ((loops_per_jiffy * HZ) / 5000) % 100, 191 (loops_per_jiffy * HZ)); 192 193 return 0; 194 } 195 196 static void *c_start(struct seq_file *m, loff_t *pos) 197 { 198 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 199 } 200 201 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 202 { 203 ++*pos; 204 return c_start(m, pos); 205 } 206 207 static void c_stop(struct seq_file *m, void *v) 208 { 209 } 210 211 const struct seq_operations cpuinfo_op = { 212 .start = c_start, 213 .next = c_next, 214 .stop = c_stop, 215 .show = show_cpuinfo, 216 }; 217 218