1 /* 2 * linux/arch/m68knommu/kernel/setup.c 3 * 4 * Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com) 5 * Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org> 6 * Copyleft ()) 2000 James D. Schettine {james@telos-systems.com} 7 * Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com> 8 * Copyright (C) 1995 Hamish Macdonald 9 * Copyright (C) 2000 Lineo Inc. (www.lineo.com) 10 * Copyright (C) 2001 Lineo, Inc. <www.lineo.com> 11 * 12 * 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca> 13 */ 14 15 /* 16 * This file handles the architecture-dependent parts of system setup 17 */ 18 19 #include <linux/kernel.h> 20 #include <linux/sched.h> 21 #include <linux/delay.h> 22 #include <linux/interrupt.h> 23 #include <linux/fb.h> 24 #include <linux/module.h> 25 #include <linux/mm.h> 26 #include <linux/console.h> 27 #include <linux/errno.h> 28 #include <linux/string.h> 29 #include <linux/bootmem.h> 30 #include <linux/seq_file.h> 31 #include <linux/init.h> 32 #include <linux/initrd.h> 33 #include <linux/root_dev.h> 34 35 #include <asm/setup.h> 36 #include <asm/irq.h> 37 #include <asm/machdep.h> 38 #include <asm/pgtable.h> 39 #include <asm/sections.h> 40 41 unsigned long memory_start; 42 unsigned long memory_end; 43 44 EXPORT_SYMBOL(memory_start); 45 EXPORT_SYMBOL(memory_end); 46 47 char __initdata command_line[COMMAND_LINE_SIZE]; 48 49 /* machine dependent timer functions */ 50 int (*mach_set_clock_mmss)(unsigned long); 51 52 /* machine dependent reboot functions */ 53 void (*mach_reset)(void); 54 void (*mach_halt)(void); 55 void (*mach_power_off)(void); 56 57 #ifdef CONFIG_M68328 58 #define CPU_NAME "MC68328" 59 #endif 60 #ifdef CONFIG_M68EZ328 61 #define CPU_NAME "MC68EZ328" 62 #endif 63 #ifdef CONFIG_M68VZ328 64 #define CPU_NAME "MC68VZ328" 65 #endif 66 #ifdef CONFIG_M68360 67 #define CPU_NAME "MC68360" 68 #endif 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 #if defined(CONFIG_UBOOT) 84 /* 85 * parse_uboot_commandline 86 * 87 * Copies u-boot commandline arguments and store them in the proper linux 88 * variables. 89 * 90 * Assumes: 91 * _init_sp global contains the address in the stack pointer when the 92 * kernel starts (see head.S::_start) 93 * 94 * U-Boot calling convention: 95 * (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); 96 * 97 * _init_sp can be parsed as such 98 * 99 * _init_sp+00 = u-boot cmd after jsr into kernel (skip) 100 * _init_sp+04 = &kernel board_info (residual data) 101 * _init_sp+08 = &initrd_start 102 * _init_sp+12 = &initrd_end 103 * _init_sp+16 = &cmd_start 104 * _init_sp+20 = &cmd_end 105 * 106 * This also assumes that the memory locations pointed to are still 107 * unmodified. U-boot places them near the end of external SDRAM. 108 * 109 * Argument(s): 110 * commandp = the linux commandline arg container to fill. 111 * size = the sizeof commandp. 112 * 113 * Returns: 114 */ 115 void parse_uboot_commandline(char *commandp, int size) 116 { 117 extern unsigned long _init_sp; 118 unsigned long *sp; 119 unsigned long uboot_kbd; 120 unsigned long uboot_initrd_start, uboot_initrd_end; 121 unsigned long uboot_cmd_start, uboot_cmd_end; 122 123 124 sp = (unsigned long *)_init_sp; 125 uboot_kbd = sp[1]; 126 uboot_initrd_start = sp[2]; 127 uboot_initrd_end = sp[3]; 128 uboot_cmd_start = sp[4]; 129 uboot_cmd_end = sp[5]; 130 131 if (uboot_cmd_start && uboot_cmd_end) 132 strncpy(commandp, (const char *)uboot_cmd_start, size); 133 #if defined(CONFIG_BLK_DEV_INITRD) 134 if (uboot_initrd_start && uboot_initrd_end && 135 (uboot_initrd_end > uboot_initrd_start)) { 136 initrd_start = uboot_initrd_start; 137 initrd_end = uboot_initrd_end; 138 ROOT_DEV = Root_RAM0; 139 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n", 140 initrd_start, initrd_end); 141 } 142 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 143 } 144 #endif /* #if defined(CONFIG_UBOOT) */ 145 146 void __init setup_arch(char **cmdline_p) 147 { 148 int bootmap_size; 149 150 memory_start = PAGE_ALIGN(_ramstart); 151 memory_end = _ramend; 152 153 init_mm.start_code = (unsigned long) &_stext; 154 init_mm.end_code = (unsigned long) &_etext; 155 init_mm.end_data = (unsigned long) &_edata; 156 init_mm.brk = (unsigned long) 0; 157 158 config_BSP(&command_line[0], sizeof(command_line)); 159 160 #if defined(CONFIG_BOOTPARAM) 161 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 162 command_line[sizeof(command_line) - 1] = 0; 163 #endif /* CONFIG_BOOTPARAM */ 164 165 #if defined(CONFIG_UBOOT) 166 /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */ 167 #if defined(CONFIG_BOOTPARAM) 168 /* Add the whitespace separator */ 169 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' '; 170 /* Parse uboot command line into the rest of the buffer */ 171 parse_uboot_commandline( 172 &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)], 173 (sizeof(command_line) - 174 (strlen(CONFIG_BOOTPARAM_STRING)+1))); 175 /* Only CONFIG_UBOOT defined, create cmdline */ 176 #else 177 parse_uboot_commandline(&command_line[0], sizeof(command_line)); 178 #endif /* CONFIG_BOOTPARAM */ 179 command_line[sizeof(command_line) - 1] = 0; 180 #endif /* CONFIG_UBOOT */ 181 182 printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n"); 183 184 #ifdef CONFIG_UCDIMM 185 printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n"); 186 #endif 187 #ifdef CONFIG_M68VZ328 188 printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 189 #endif 190 #ifdef CONFIG_COLDFIRE 191 printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 192 #ifdef CONFIG_M5307 193 printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 194 #endif 195 #ifdef CONFIG_ELITE 196 printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 197 #endif 198 #endif 199 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 200 201 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 202 printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 203 #endif 204 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 205 printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 206 #endif 207 #if defined (CONFIG_M68360) 208 printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n"); 209 printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n"); 210 #endif 211 #ifdef CONFIG_DRAGEN2 212 printk(KERN_INFO "DragonEngine II board support by Georges Menie\n"); 213 #endif 214 #ifdef CONFIG_M5235EVB 215 printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 216 #endif 217 218 pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x " 219 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext, 220 (int) &_sdata, (int) &_edata, 221 (int) &_sbss, (int) &_ebss); 222 pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ", 223 (int) &_ebss, (int) memory_start, 224 (int) memory_start, (int) memory_end); 225 226 /* Keep a copy of command line */ 227 *cmdline_p = &command_line[0]; 228 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 229 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 230 231 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 232 conswitchp = &dummy_con; 233 #endif 234 235 /* 236 * Give all the memory to the bootmap allocator, tell it to put the 237 * boot mem_map at the start of memory. 238 */ 239 bootmap_size = init_bootmem_node( 240 NODE_DATA(0), 241 memory_start >> PAGE_SHIFT, /* map goes here */ 242 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ 243 memory_end >> PAGE_SHIFT); 244 /* 245 * Free the usable memory, we have to make sure we do not free 246 * the bootmem bitmap so we then reserve it after freeing it :-) 247 */ 248 free_bootmem(memory_start, memory_end - memory_start); 249 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); 250 251 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 252 if ((initrd_start > 0) && (initrd_start < initrd_end) && 253 (initrd_end < memory_end)) 254 reserve_bootmem(initrd_start, initrd_end - initrd_start, 255 BOOTMEM_DEFAULT); 256 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 257 258 /* 259 * Get kmalloc into gear. 260 */ 261 paging_init(); 262 } 263 264 /* 265 * Get CPU information for use by the procfs. 266 */ 267 static int show_cpuinfo(struct seq_file *m, void *v) 268 { 269 char *cpu, *mmu, *fpu; 270 u_long clockfreq; 271 272 cpu = CPU_NAME; 273 mmu = "none"; 274 fpu = "none"; 275 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 276 277 seq_printf(m, "CPU:\t\t%s\n" 278 "MMU:\t\t%s\n" 279 "FPU:\t\t%s\n" 280 "Clocking:\t%lu.%1luMHz\n" 281 "BogoMips:\t%lu.%02lu\n" 282 "Calibration:\t%lu loops\n", 283 cpu, mmu, fpu, 284 clockfreq / 1000000, 285 (clockfreq / 100000) % 10, 286 (loops_per_jiffy * HZ) / 500000, 287 ((loops_per_jiffy * HZ) / 5000) % 100, 288 (loops_per_jiffy * HZ)); 289 290 return 0; 291 } 292 293 static void *c_start(struct seq_file *m, loff_t *pos) 294 { 295 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 296 } 297 298 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 299 { 300 ++*pos; 301 return c_start(m, pos); 302 } 303 304 static void c_stop(struct seq_file *m, void *v) 305 { 306 } 307 308 const struct seq_operations cpuinfo_op = { 309 .start = c_start, 310 .next = c_next, 311 .stop = c_stop, 312 .show = show_cpuinfo, 313 }; 314 315