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/bootmem.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_set_clock_mmss)(unsigned long); 55 int (*mach_hwclk) (int, struct rtc_time*); 56 57 /* machine dependent reboot functions */ 58 void (*mach_reset)(void); 59 void (*mach_halt)(void); 60 void (*mach_power_off)(void); 61 62 #ifdef CONFIG_M68000 63 #if defined(CONFIG_M68328) 64 #define CPU_NAME "MC68328" 65 #elif defined(CONFIG_M68EZ328) 66 #define CPU_NAME "MC68EZ328" 67 #elif defined(CONFIG_M68VZ328) 68 #define CPU_NAME "MC68VZ328" 69 #else 70 #define CPU_NAME "MC68000" 71 #endif 72 #endif /* CONFIG_M68000 */ 73 #ifndef CPU_NAME 74 #define CPU_NAME "UNKNOWN" 75 #endif 76 77 /* 78 * Different cores have different instruction execution timings. 79 * The old/traditional 68000 cores are basically all the same, at 16. 80 * The ColdFire cores vary a little, their values are defined in their 81 * headers. We default to the standard 68000 value here. 82 */ 83 #ifndef CPU_INSTR_PER_JIFFY 84 #define CPU_INSTR_PER_JIFFY 16 85 #endif 86 87 void __init setup_arch(char **cmdline_p) 88 { 89 int bootmap_size; 90 91 memory_start = PAGE_ALIGN(_ramstart); 92 memory_end = _ramend; 93 94 init_mm.start_code = (unsigned long) &_stext; 95 init_mm.end_code = (unsigned long) &_etext; 96 init_mm.end_data = (unsigned long) &_edata; 97 init_mm.brk = (unsigned long) 0; 98 99 config_BSP(&command_line[0], sizeof(command_line)); 100 101 #if defined(CONFIG_BOOTPARAM) 102 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 103 command_line[sizeof(command_line) - 1] = 0; 104 #endif /* CONFIG_BOOTPARAM */ 105 106 process_uboot_commandline(&command_line[0], sizeof(command_line)); 107 108 pr_info("uClinux with CPU " CPU_NAME "\n"); 109 110 #ifdef CONFIG_UCDIMM 111 pr_info("uCdimm by Lineo, Inc. <www.lineo.com>\n"); 112 #endif 113 #ifdef CONFIG_M68VZ328 114 pr_info("M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 115 #endif 116 #ifdef CONFIG_COLDFIRE 117 pr_info("COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 118 #ifdef CONFIG_M5307 119 pr_info("Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 120 #endif 121 #ifdef CONFIG_ELITE 122 pr_info("Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 123 #endif 124 #endif 125 pr_info("Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 126 127 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 128 pr_info("TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 129 #endif 130 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 131 pr_info("PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 132 #endif 133 #ifdef CONFIG_DRAGEN2 134 pr_info("DragonEngine II board support by Georges Menie\n"); 135 #endif 136 #ifdef CONFIG_M5235EVB 137 pr_info("Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 138 #endif 139 140 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 141 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 142 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", 143 __bss_stop, memory_start, memory_start, memory_end); 144 145 /* Keep a copy of command line */ 146 *cmdline_p = &command_line[0]; 147 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 148 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 149 150 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 151 conswitchp = &dummy_con; 152 #endif 153 154 /* 155 * Give all the memory to the bootmap allocator, tell it to put the 156 * boot mem_map at the start of memory. 157 */ 158 min_low_pfn = PFN_DOWN(memory_start); 159 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 160 161 bootmap_size = init_bootmem_node( 162 NODE_DATA(0), 163 min_low_pfn, /* map goes here */ 164 PFN_DOWN(PAGE_OFFSET), 165 max_pfn); 166 /* 167 * Free the usable memory, we have to make sure we do not free 168 * the bootmem bitmap so we then reserve it after freeing it :-) 169 */ 170 free_bootmem(memory_start, memory_end - memory_start); 171 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); 172 173 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 174 if ((initrd_start > 0) && (initrd_start < initrd_end) && 175 (initrd_end < memory_end)) 176 reserve_bootmem(initrd_start, initrd_end - initrd_start, 177 BOOTMEM_DEFAULT); 178 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 179 180 /* 181 * Get kmalloc into gear. 182 */ 183 paging_init(); 184 } 185 186 /* 187 * Get CPU information for use by the procfs. 188 */ 189 static int show_cpuinfo(struct seq_file *m, void *v) 190 { 191 char *cpu, *mmu, *fpu; 192 u_long clockfreq; 193 194 cpu = CPU_NAME; 195 mmu = "none"; 196 fpu = "none"; 197 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 198 199 seq_printf(m, "CPU:\t\t%s\n" 200 "MMU:\t\t%s\n" 201 "FPU:\t\t%s\n" 202 "Clocking:\t%lu.%1luMHz\n" 203 "BogoMips:\t%lu.%02lu\n" 204 "Calibration:\t%lu loops\n", 205 cpu, mmu, fpu, 206 clockfreq / 1000000, 207 (clockfreq / 100000) % 10, 208 (loops_per_jiffy * HZ) / 500000, 209 ((loops_per_jiffy * HZ) / 5000) % 100, 210 (loops_per_jiffy * HZ)); 211 212 return 0; 213 } 214 215 static void *c_start(struct seq_file *m, loff_t *pos) 216 { 217 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 218 } 219 220 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 221 { 222 ++*pos; 223 return c_start(m, pos); 224 } 225 226 static void c_stop(struct seq_file *m, void *v) 227 { 228 } 229 230 const struct seq_operations cpuinfo_op = { 231 .start = c_start, 232 .next = c_next, 233 .stop = c_stop, 234 .show = show_cpuinfo, 235 }; 236 237