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