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 #include <linux/rtc.h> 35 36 #include <asm/setup.h> 37 #include <asm/irq.h> 38 #include <asm/machdep.h> 39 #include <asm/pgtable.h> 40 #include <asm/sections.h> 41 42 unsigned long memory_start; 43 unsigned long memory_end; 44 45 EXPORT_SYMBOL(memory_start); 46 EXPORT_SYMBOL(memory_end); 47 48 char __initdata command_line[COMMAND_LINE_SIZE]; 49 50 /* machine dependent timer functions */ 51 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL; 52 int (*mach_set_clock_mmss)(unsigned long); 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 #define CPU_NAME "MC68000" 62 #endif 63 #ifdef CONFIG_M68328 64 #define CPU_NAME "MC68328" 65 #endif 66 #ifdef CONFIG_M68EZ328 67 #define CPU_NAME "MC68EZ328" 68 #endif 69 #ifdef CONFIG_M68VZ328 70 #define CPU_NAME "MC68VZ328" 71 #endif 72 #ifdef CONFIG_M68360 73 #define CPU_NAME "MC68360" 74 #endif 75 #ifndef CPU_NAME 76 #define CPU_NAME "UNKNOWN" 77 #endif 78 79 /* 80 * Different cores have different instruction execution timings. 81 * The old/traditional 68000 cores are basically all the same, at 16. 82 * The ColdFire cores vary a little, their values are defined in their 83 * headers. We default to the standard 68000 value here. 84 */ 85 #ifndef CPU_INSTR_PER_JIFFY 86 #define CPU_INSTR_PER_JIFFY 16 87 #endif 88 89 #if defined(CONFIG_UBOOT) 90 /* 91 * parse_uboot_commandline 92 * 93 * Copies u-boot commandline arguments and store them in the proper linux 94 * variables. 95 * 96 * Assumes: 97 * _init_sp global contains the address in the stack pointer when the 98 * kernel starts (see head.S::_start) 99 * 100 * U-Boot calling convention: 101 * (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); 102 * 103 * _init_sp can be parsed as such 104 * 105 * _init_sp+00 = u-boot cmd after jsr into kernel (skip) 106 * _init_sp+04 = &kernel board_info (residual data) 107 * _init_sp+08 = &initrd_start 108 * _init_sp+12 = &initrd_end 109 * _init_sp+16 = &cmd_start 110 * _init_sp+20 = &cmd_end 111 * 112 * This also assumes that the memory locations pointed to are still 113 * unmodified. U-boot places them near the end of external SDRAM. 114 * 115 * Argument(s): 116 * commandp = the linux commandline arg container to fill. 117 * size = the sizeof commandp. 118 * 119 * Returns: 120 */ 121 void parse_uboot_commandline(char *commandp, int size) 122 { 123 extern unsigned long _init_sp; 124 unsigned long *sp; 125 unsigned long uboot_kbd; 126 unsigned long uboot_initrd_start, uboot_initrd_end; 127 unsigned long uboot_cmd_start, uboot_cmd_end; 128 129 130 sp = (unsigned long *)_init_sp; 131 uboot_kbd = sp[1]; 132 uboot_initrd_start = sp[2]; 133 uboot_initrd_end = sp[3]; 134 uboot_cmd_start = sp[4]; 135 uboot_cmd_end = sp[5]; 136 137 if (uboot_cmd_start && uboot_cmd_end) 138 strncpy(commandp, (const char *)uboot_cmd_start, size); 139 #if defined(CONFIG_BLK_DEV_INITRD) 140 if (uboot_initrd_start && uboot_initrd_end && 141 (uboot_initrd_end > uboot_initrd_start)) { 142 initrd_start = uboot_initrd_start; 143 initrd_end = uboot_initrd_end; 144 ROOT_DEV = Root_RAM0; 145 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n", 146 initrd_start, initrd_end); 147 } 148 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 149 } 150 #endif /* #if defined(CONFIG_UBOOT) */ 151 152 void __init setup_arch(char **cmdline_p) 153 { 154 int bootmap_size; 155 156 memory_start = PAGE_ALIGN(_ramstart); 157 memory_end = _ramend; 158 159 init_mm.start_code = (unsigned long) &_stext; 160 init_mm.end_code = (unsigned long) &_etext; 161 init_mm.end_data = (unsigned long) &_edata; 162 init_mm.brk = (unsigned long) 0; 163 164 config_BSP(&command_line[0], sizeof(command_line)); 165 166 #if defined(CONFIG_BOOTPARAM) 167 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 168 command_line[sizeof(command_line) - 1] = 0; 169 #endif /* CONFIG_BOOTPARAM */ 170 171 #if defined(CONFIG_UBOOT) 172 /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */ 173 #if defined(CONFIG_BOOTPARAM) 174 /* Add the whitespace separator */ 175 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' '; 176 /* Parse uboot command line into the rest of the buffer */ 177 parse_uboot_commandline( 178 &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)], 179 (sizeof(command_line) - 180 (strlen(CONFIG_BOOTPARAM_STRING)+1))); 181 /* Only CONFIG_UBOOT defined, create cmdline */ 182 #else 183 parse_uboot_commandline(&command_line[0], sizeof(command_line)); 184 #endif /* CONFIG_BOOTPARAM */ 185 command_line[sizeof(command_line) - 1] = 0; 186 #endif /* CONFIG_UBOOT */ 187 188 printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n"); 189 190 #ifdef CONFIG_UCDIMM 191 printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n"); 192 #endif 193 #ifdef CONFIG_M68VZ328 194 printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 195 #endif 196 #ifdef CONFIG_COLDFIRE 197 printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 198 #ifdef CONFIG_M5307 199 printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 200 #endif 201 #ifdef CONFIG_ELITE 202 printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 203 #endif 204 #endif 205 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 206 207 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 208 printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 209 #endif 210 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 211 printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 212 #endif 213 #if defined (CONFIG_M68360) 214 printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n"); 215 printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n"); 216 #endif 217 #ifdef CONFIG_DRAGEN2 218 printk(KERN_INFO "DragonEngine II board support by Georges Menie\n"); 219 #endif 220 #ifdef CONFIG_M5235EVB 221 printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 222 #endif 223 224 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 225 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 226 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", 227 __bss_stop, memory_start, memory_start, memory_end); 228 229 /* Keep a copy of command line */ 230 *cmdline_p = &command_line[0]; 231 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 232 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 233 234 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 235 conswitchp = &dummy_con; 236 #endif 237 238 /* 239 * Give all the memory to the bootmap allocator, tell it to put the 240 * boot mem_map at the start of memory. 241 */ 242 bootmap_size = init_bootmem_node( 243 NODE_DATA(0), 244 memory_start >> PAGE_SHIFT, /* map goes here */ 245 PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */ 246 memory_end >> PAGE_SHIFT); 247 /* 248 * Free the usable memory, we have to make sure we do not free 249 * the bootmem bitmap so we then reserve it after freeing it :-) 250 */ 251 free_bootmem(memory_start, memory_end - memory_start); 252 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); 253 254 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 255 if ((initrd_start > 0) && (initrd_start < initrd_end) && 256 (initrd_end < memory_end)) 257 reserve_bootmem(initrd_start, initrd_end - initrd_start, 258 BOOTMEM_DEFAULT); 259 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 260 261 /* 262 * Get kmalloc into gear. 263 */ 264 paging_init(); 265 } 266 267 /* 268 * Get CPU information for use by the procfs. 269 */ 270 static int show_cpuinfo(struct seq_file *m, void *v) 271 { 272 char *cpu, *mmu, *fpu; 273 u_long clockfreq; 274 275 cpu = CPU_NAME; 276 mmu = "none"; 277 fpu = "none"; 278 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 279 280 seq_printf(m, "CPU:\t\t%s\n" 281 "MMU:\t\t%s\n" 282 "FPU:\t\t%s\n" 283 "Clocking:\t%lu.%1luMHz\n" 284 "BogoMips:\t%lu.%02lu\n" 285 "Calibration:\t%lu loops\n", 286 cpu, mmu, fpu, 287 clockfreq / 1000000, 288 (clockfreq / 100000) % 10, 289 (loops_per_jiffy * HZ) / 500000, 290 ((loops_per_jiffy * HZ) / 5000) % 100, 291 (loops_per_jiffy * HZ)); 292 293 return 0; 294 } 295 296 static void *c_start(struct seq_file *m, loff_t *pos) 297 { 298 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 299 } 300 301 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 302 { 303 ++*pos; 304 return c_start(m, pos); 305 } 306 307 static void c_stop(struct seq_file *m, void *v) 308 { 309 } 310 311 const struct seq_operations cpuinfo_op = { 312 .start = c_start, 313 .next = c_next, 314 .stop = c_stop, 315 .show = show_cpuinfo, 316 }; 317 318