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 #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 #ifdef CONFIG_M68360 72 #define CPU_NAME "MC68360" 73 #endif 74 #ifndef CPU_NAME 75 #define CPU_NAME "UNKNOWN" 76 #endif 77 78 /* 79 * Different cores have different instruction execution timings. 80 * The old/traditional 68000 cores are basically all the same, at 16. 81 * The ColdFire cores vary a little, their values are defined in their 82 * headers. We default to the standard 68000 value here. 83 */ 84 #ifndef CPU_INSTR_PER_JIFFY 85 #define CPU_INSTR_PER_JIFFY 16 86 #endif 87 88 #if defined(CONFIG_UBOOT) 89 /* 90 * parse_uboot_commandline 91 * 92 * Copies u-boot commandline arguments and store them in the proper linux 93 * variables. 94 * 95 * Assumes: 96 * _init_sp global contains the address in the stack pointer when the 97 * kernel starts (see head.S::_start) 98 * 99 * U-Boot calling convention: 100 * (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end); 101 * 102 * _init_sp can be parsed as such 103 * 104 * _init_sp+00 = u-boot cmd after jsr into kernel (skip) 105 * _init_sp+04 = &kernel board_info (residual data) 106 * _init_sp+08 = &initrd_start 107 * _init_sp+12 = &initrd_end 108 * _init_sp+16 = &cmd_start 109 * _init_sp+20 = &cmd_end 110 * 111 * This also assumes that the memory locations pointed to are still 112 * unmodified. U-boot places them near the end of external SDRAM. 113 * 114 * Argument(s): 115 * commandp = the linux commandline arg container to fill. 116 * size = the sizeof commandp. 117 * 118 * Returns: 119 */ 120 static void __init parse_uboot_commandline(char *commandp, int size) 121 { 122 extern unsigned long _init_sp; 123 unsigned long *sp; 124 unsigned long uboot_kbd; 125 unsigned long uboot_initrd_start, uboot_initrd_end; 126 unsigned long uboot_cmd_start, uboot_cmd_end; 127 128 129 sp = (unsigned long *)_init_sp; 130 uboot_kbd = sp[1]; 131 uboot_initrd_start = sp[2]; 132 uboot_initrd_end = sp[3]; 133 uboot_cmd_start = sp[4]; 134 uboot_cmd_end = sp[5]; 135 136 if (uboot_cmd_start && uboot_cmd_end) 137 strncpy(commandp, (const char *)uboot_cmd_start, size); 138 #if defined(CONFIG_BLK_DEV_INITRD) 139 if (uboot_initrd_start && uboot_initrd_end && 140 (uboot_initrd_end > uboot_initrd_start)) { 141 initrd_start = uboot_initrd_start; 142 initrd_end = uboot_initrd_end; 143 ROOT_DEV = Root_RAM0; 144 printk(KERN_INFO "initrd at 0x%lx:0x%lx\n", 145 initrd_start, initrd_end); 146 } 147 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 148 } 149 #endif /* #if defined(CONFIG_UBOOT) */ 150 151 void __init setup_arch(char **cmdline_p) 152 { 153 int bootmap_size; 154 155 memory_start = PAGE_ALIGN(_ramstart); 156 memory_end = _ramend; 157 158 init_mm.start_code = (unsigned long) &_stext; 159 init_mm.end_code = (unsigned long) &_etext; 160 init_mm.end_data = (unsigned long) &_edata; 161 init_mm.brk = (unsigned long) 0; 162 163 config_BSP(&command_line[0], sizeof(command_line)); 164 165 #if defined(CONFIG_BOOTPARAM) 166 strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line)); 167 command_line[sizeof(command_line) - 1] = 0; 168 #endif /* CONFIG_BOOTPARAM */ 169 170 #if defined(CONFIG_UBOOT) 171 /* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */ 172 #if defined(CONFIG_BOOTPARAM) 173 /* Add the whitespace separator */ 174 command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' '; 175 /* Parse uboot command line into the rest of the buffer */ 176 parse_uboot_commandline( 177 &command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)], 178 (sizeof(command_line) - 179 (strlen(CONFIG_BOOTPARAM_STRING)+1))); 180 /* Only CONFIG_UBOOT defined, create cmdline */ 181 #else 182 parse_uboot_commandline(&command_line[0], sizeof(command_line)); 183 #endif /* CONFIG_BOOTPARAM */ 184 command_line[sizeof(command_line) - 1] = 0; 185 #endif /* CONFIG_UBOOT */ 186 187 printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n"); 188 189 #ifdef CONFIG_UCDIMM 190 printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n"); 191 #endif 192 #ifdef CONFIG_M68VZ328 193 printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n"); 194 #endif 195 #ifdef CONFIG_COLDFIRE 196 printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n"); 197 #ifdef CONFIG_M5307 198 printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n"); 199 #endif 200 #ifdef CONFIG_ELITE 201 printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n"); 202 #endif 203 #endif 204 printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n"); 205 206 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 ) 207 printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n"); 208 #endif 209 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 ) 210 printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n"); 211 #endif 212 #if defined (CONFIG_M68360) 213 printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n"); 214 printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n"); 215 #endif 216 #ifdef CONFIG_DRAGEN2 217 printk(KERN_INFO "DragonEngine II board support by Georges Menie\n"); 218 #endif 219 #ifdef CONFIG_M5235EVB 220 printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n"); 221 #endif 222 223 pr_debug("KERNEL -> TEXT=0x%p-0x%p DATA=0x%p-0x%p BSS=0x%p-0x%p\n", 224 _stext, _etext, _sdata, _edata, __bss_start, __bss_stop); 225 pr_debug("MEMORY -> ROMFS=0x%p-0x%06lx MEM=0x%06lx-0x%06lx\n ", 226 __bss_stop, memory_start, memory_start, memory_end); 227 228 /* Keep a copy of command line */ 229 *cmdline_p = &command_line[0]; 230 memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); 231 boot_command_line[COMMAND_LINE_SIZE-1] = 0; 232 233 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE) 234 conswitchp = &dummy_con; 235 #endif 236 237 /* 238 * Give all the memory to the bootmap allocator, tell it to put the 239 * boot mem_map at the start of memory. 240 */ 241 min_low_pfn = PFN_DOWN(memory_start); 242 max_pfn = max_low_pfn = PFN_DOWN(memory_end); 243 244 bootmap_size = init_bootmem_node( 245 NODE_DATA(0), 246 min_low_pfn, /* map goes here */ 247 PFN_DOWN(PAGE_OFFSET), 248 max_pfn); 249 /* 250 * Free the usable memory, we have to make sure we do not free 251 * the bootmem bitmap so we then reserve it after freeing it :-) 252 */ 253 free_bootmem(memory_start, memory_end - memory_start); 254 reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT); 255 256 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD) 257 if ((initrd_start > 0) && (initrd_start < initrd_end) && 258 (initrd_end < memory_end)) 259 reserve_bootmem(initrd_start, initrd_end - initrd_start, 260 BOOTMEM_DEFAULT); 261 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */ 262 263 /* 264 * Get kmalloc into gear. 265 */ 266 paging_init(); 267 } 268 269 /* 270 * Get CPU information for use by the procfs. 271 */ 272 static int show_cpuinfo(struct seq_file *m, void *v) 273 { 274 char *cpu, *mmu, *fpu; 275 u_long clockfreq; 276 277 cpu = CPU_NAME; 278 mmu = "none"; 279 fpu = "none"; 280 clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY; 281 282 seq_printf(m, "CPU:\t\t%s\n" 283 "MMU:\t\t%s\n" 284 "FPU:\t\t%s\n" 285 "Clocking:\t%lu.%1luMHz\n" 286 "BogoMips:\t%lu.%02lu\n" 287 "Calibration:\t%lu loops\n", 288 cpu, mmu, fpu, 289 clockfreq / 1000000, 290 (clockfreq / 100000) % 10, 291 (loops_per_jiffy * HZ) / 500000, 292 ((loops_per_jiffy * HZ) / 5000) % 100, 293 (loops_per_jiffy * HZ)); 294 295 return 0; 296 } 297 298 static void *c_start(struct seq_file *m, loff_t *pos) 299 { 300 return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL; 301 } 302 303 static void *c_next(struct seq_file *m, void *v, loff_t *pos) 304 { 305 ++*pos; 306 return c_start(m, pos); 307 } 308 309 static void c_stop(struct seq_file *m, void *v) 310 { 311 } 312 313 const struct seq_operations cpuinfo_op = { 314 .start = c_start, 315 .next = c_next, 316 .stop = c_stop, 317 .show = show_cpuinfo, 318 }; 319 320