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/pgtable.h> 42 #include <asm/sections.h> 43 44 unsigned long memory_start; 45 unsigned long memory_end; 46 47 EXPORT_SYMBOL(memory_start); 48 EXPORT_SYMBOL(memory_end); 49 50 char __initdata command_line[COMMAND_LINE_SIZE]; 51 52 /* machine dependent timer functions */ 53 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL; 54 int (*mach_hwclk) (int, struct rtc_time*); 55 56 /* machine dependent reboot functions */ 57 void (*mach_reset)(void); 58 void (*mach_halt)(void); 59 void (*mach_power_off)(void); 60 61 #ifdef CONFIG_M68000 62 #if defined(CONFIG_M68328) 63 #define CPU_NAME "MC68328" 64 #elif defined(CONFIG_M68EZ328) 65 #define CPU_NAME "MC68EZ328" 66 #elif defined(CONFIG_M68VZ328) 67 #define CPU_NAME "MC68VZ328" 68 #else 69 #define CPU_NAME "MC68000" 70 #endif 71 #endif /* CONFIG_M68000 */ 72 #ifndef CPU_NAME 73 #define CPU_NAME "UNKNOWN" 74 #endif 75 76 /* 77 * Different cores have different instruction execution timings. 78 * The old/traditional 68000 cores are basically all the same, at 16. 79 * The ColdFire cores vary a little, their values are defined in their 80 * headers. We default to the standard 68000 value here. 81 */ 82 #ifndef CPU_INSTR_PER_JIFFY 83 #define CPU_INSTR_PER_JIFFY 16 84 #endif 85 86 void __init setup_arch(char **cmdline_p) 87 { 88 memory_start = PAGE_ALIGN(_ramstart); 89 memory_end = _ramend; 90 91 init_mm.start_code = (unsigned long) &_stext; 92 init_mm.end_code = (unsigned long) &_etext; 93 init_mm.end_data = (unsigned long) &_edata; 94 init_mm.brk = (unsigned long) 0; 95 96 config_BSP(&command_line[0], sizeof(command_line)); 97 98 #if defined(CONFIG_BOOTPARAM) 99 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 100 command_line[sizeof(command_line) - 1] = 0; 101 #endif /* CONFIG_BOOTPARAM */ 102 103 process_uboot_commandline(&command_line[0], sizeof(command_line)); 104 105 pr_info("uClinux with CPU " CPU_NAME "\n"); 106 107 #ifdef CONFIG_UCDIMM 108 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n"); 109 #endif 110 #ifdef CONFIG_M68VZ328 111 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\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("TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 126 #endif 127 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 128 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 129 #endif 130 #ifdef CONFIG_DRAGEN2 131 pr_info("DragonEngine II board support by Georges Menie\n"); 132 #endif 133 #ifdef CONFIG_M5235EVB 134 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 135 #endif 136 137 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 138 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 139 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", 140 __bss_stop, memory_start, memory_start, memory_end); 141 142 memblock_add(memory_start, memory_end - memory_start); 143 144 /* Keep a copy of command line */ 145 *cmdline_p = &command_line[0]; 146 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 147 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 148 149 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 150 conswitchp = &dummy_con; 151 #endif 152 153 /* 154 * Give all the memory to the bootmap allocator, tell it to put the 155 * boot mem_map at the start of memory. 156 */ 157 min_low_pfn = PFN_DOWN(memory_start); 158 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 159 160 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 161 if ((initrd_start > 0) && (initrd_start < initrd_end) && 162 (initrd_end < memory_end)) 163 memblock_reserve(initrd_start, initrd_end - initrd_start); 164 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 165 166 /* 167 * Get kmalloc into gear. 168 */ 169 paging_init(); 170 } 171 172 /* 173 * Get CPU information for use by the procfs. 174 */ 175 static int show_cpuinfo(struct seq_file *m, void *v) 176 { 177 char *cpu, *mmu, *fpu; 178 u_long clockfreq; 179 180 cpu = CPU_NAME; 181 mmu = "none"; 182 fpu = "none"; 183 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 184 185 seq_printf(m, "CPU:\t\t%s\n" 186 "MMU:\t\t%s\n" 187 "FPU:\t\t%s\n" 188 "Clocking:\t%lu.%1luMHz\n" 189 "BogoMips:\t%lu.%02lu\n" 190 "Calibration:\t%lu loops\n", 191 cpu, mmu, fpu, 192 clockfreq / 1000000, 193 (clockfreq / 100000) % 10, 194 (loops_per_jiffy * HZ) / 500000, 195 ((loops_per_jiffy * HZ) / 5000) % 100, 196 (loops_per_jiffy * HZ)); 197 198 return 0; 199 } 200 201 static void *c_start(struct seq_file *m, loff_t *pos) 202 { 203 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 204 } 205 206 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 207 { 208 ++*pos; 209 return c_start(m, pos); 210 } 211 212 static void c_stop(struct seq_file *m, void *v) 213 { 214 } 215 216 const struct seq_operations cpuinfo_op = { 217 .start = c_start, 218 .next = c_next, 219 .stop = c_stop, 220 .show = show_cpuinfo, 221 }; 222 223