arch/m68k/kernel/setup_no.c - maze/linux - Git at Google

 /*
  *  linux/arch/m68knommu/kernel/setup.c
  *
  *  Copyright (C) 1999-2007  Greg Ungerer (gerg@snapgear.com)
  *  Copyright (C) 1998,1999  D. Jeff Dionne <jeff@uClinux.org>
  *  Copyleft  ()) 2000       James D. Schettine {james@telos-systems.com}
  *  Copyright (C) 1998       Kenneth Albanowski <kjahds@kjahds.com>
  *  Copyright (C) 1995       Hamish Macdonald
  *  Copyright (C) 2000       Lineo Inc. (www.lineo.com)
  *  Copyright (C) 2001 	     Lineo, Inc. <www.lineo.com>
  *
  *  68VZ328 Fixes/support    Evan Stawnyczy <e@lineo.ca>
  */

 /*
  * This file handles the architecture-dependent parts of system setup
  */

 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/fb.h>
 #include <linux/module.h>
 #include <linux/mm.h>
 #include <linux/console.h>
 #include <linux/errno.h>
 #include <linux/string.h>
 #include <linux/bootmem.h>
 #include <linux/seq_file.h>
 #include <linux/init.h>
 #include <linux/initrd.h>
 #include <linux/root_dev.h>
 #include <linux/rtc.h>

 #include <asm/setup.h>
 #include <asm/irq.h>
 #include <asm/machdep.h>
 #include <asm/pgtable.h>
 #include <asm/sections.h>

 unsigned long memory_start;
 unsigned long memory_end;

 EXPORT_SYMBOL(memory_start);
 EXPORT_SYMBOL(memory_end);

 char __initdata command_line[COMMAND_LINE_SIZE];

 /* machine dependent timer functions */
 void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
 int (*mach_set_clock_mmss)(unsigned long);
 int (*mach_hwclk) (int, struct rtc_time*);

 /* machine dependent reboot functions */
 void (*mach_reset)(void);
 void (*mach_halt)(void);
 void (*mach_power_off)(void);

 #ifdef CONFIG_M68328
 #define CPU_NAME	"MC68328"
 #endif
 #ifdef CONFIG_M68EZ328
 #define CPU_NAME	"MC68EZ328"
 #endif
 #ifdef CONFIG_M68VZ328
 #define CPU_NAME	"MC68VZ328"
 #endif
 #ifdef CONFIG_M68360
 #define CPU_NAME	"MC68360"
 #endif
 #ifndef CPU_NAME
 #define	CPU_NAME	"UNKNOWN"
 #endif

 /*
  * Different cores have different instruction execution timings.
  * The old/traditional 68000 cores are basically all the same, at 16.
  * The ColdFire cores vary a little, their values are defined in their
  * headers. We default to the standard 68000 value here.
  */
 #ifndef CPU_INSTR_PER_JIFFY
 #define	CPU_INSTR_PER_JIFFY	16
 #endif

 #if defined(CONFIG_UBOOT)
 /*
  * parse_uboot_commandline
  *
  * Copies u-boot commandline arguments and store them in the proper linux
  * variables.
  *
  * Assumes:
  *	_init_sp global contains the address in the stack pointer when the
  *	kernel starts (see head.S::_start)
  *
  *	U-Boot calling convention:
  *	(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
  *
  *	_init_sp can be parsed as such
  *
  *	_init_sp+00 = u-boot cmd after jsr into kernel (skip)
  *	_init_sp+04 = &kernel board_info (residual data)
  *	_init_sp+08 = &initrd_start
  *	_init_sp+12 = &initrd_end
  *	_init_sp+16 = &cmd_start
  *	_init_sp+20 = &cmd_end
  *
  *	This also assumes that the memory locations pointed to are still
  *	unmodified. U-boot places them near the end of external SDRAM.
  *
  * Argument(s):
  *	commandp = the linux commandline arg container to fill.
  *	size     = the sizeof commandp.
  *
  * Returns:
  */
 void parse_uboot_commandline(char *commandp, int size)
 {
 	extern unsigned long _init_sp;
 	unsigned long *sp;
 	unsigned long uboot_kbd;
 	unsigned long uboot_initrd_start, uboot_initrd_end;
 	unsigned long uboot_cmd_start, uboot_cmd_end;


 	sp = (unsigned long *)_init_sp;
 	uboot_kbd = sp[1];
 	uboot_initrd_start = sp[2];
 	uboot_initrd_end = sp[3];
 	uboot_cmd_start = sp[4];
 	uboot_cmd_end = sp[5];

 	if (uboot_cmd_start && uboot_cmd_end)
 		strncpy(commandp, (const char *)uboot_cmd_start, size);
 #if defined(CONFIG_BLK_DEV_INITRD)
 	if (uboot_initrd_start && uboot_initrd_end &&
 		(uboot_initrd_end > uboot_initrd_start)) {
 		initrd_start = uboot_initrd_start;
 		initrd_end = uboot_initrd_end;
 		ROOT_DEV = Root_RAM0;
 		printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
 			initrd_start, initrd_end);
 	}
 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */
 }
 #endif /* #if defined(CONFIG_UBOOT) */

 void __init setup_arch(char **cmdline_p)
 {
 	int bootmap_size;

 	memory_start = PAGE_ALIGN(_ramstart);
 	memory_end = _ramend;

 	init_mm.start_code = (unsigned long) &_stext;
 	init_mm.end_code = (unsigned long) &_etext;
 	init_mm.end_data = (unsigned long) &_edata;
 	init_mm.brk = (unsigned long) 0;

 	config_BSP(&command_line[0], sizeof(command_line));

 #if defined(CONFIG_BOOTPARAM)
 	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
 	command_line[sizeof(command_line) - 1] = 0;
 #endif /* CONFIG_BOOTPARAM */

 #if defined(CONFIG_UBOOT)
 	/* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
 	#if defined(CONFIG_BOOTPARAM)
 		/* Add the whitespace separator */
 		command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
 		/* Parse uboot command line into the rest of the buffer */
 		parse_uboot_commandline(
 			&command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
 			(sizeof(command_line) -
 			(strlen(CONFIG_BOOTPARAM_STRING)+1)));
 	/* Only CONFIG_UBOOT defined, create cmdline */
 	#else
 		parse_uboot_commandline(&command_line[0], sizeof(command_line));
 	#endif /* CONFIG_BOOTPARAM */
 	command_line[sizeof(command_line) - 1] = 0;
 #endif /* CONFIG_UBOOT */

 	printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");

 #ifdef CONFIG_UCDIMM
 	printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
 #endif
 #ifdef CONFIG_M68VZ328
 	printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
 #endif
 #ifdef CONFIG_COLDFIRE
 	printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
 #ifdef CONFIG_M5307
 	printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
 #endif
 #ifdef CONFIG_ELITE
 	printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
 #endif
 #endif
 	printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");

 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
 	printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
 #endif
 #if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
 	printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
 #endif
 #if defined (CONFIG_M68360)
 	printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
 	printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
 #endif
 #ifdef CONFIG_DRAGEN2
 	printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
 #endif
 #ifdef CONFIG_M5235EVB
 	printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
 #endif

 	pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
 		 "BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
 		 (int) &_sdata, (int) &_edata,
 		 (int) &_sbss, (int) &_ebss);
 	pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
 		 (int) &_ebss, (int) memory_start,
 		 (int) memory_start, (int) memory_end);

 	/* Keep a copy of command line */
 	*cmdline_p = &command_line[0];
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	boot_command_line[COMMAND_LINE_SIZE-1] = 0;

 #if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
 	conswitchp = &dummy_con;
 #endif

 	/*
 	 * Give all the memory to the bootmap allocator, tell it to put the
 	 * boot mem_map at the start of memory.
 	 */
 	bootmap_size = init_bootmem_node(
 			NODE_DATA(0),
 			memory_start >> PAGE_SHIFT, /* map goes here */
 			PAGE_OFFSET >> PAGE_SHIFT,	/* 0 on coldfire */
 			memory_end >> PAGE_SHIFT);
 	/*
 	 * Free the usable memory, we have to make sure we do not free
 	 * the bootmem bitmap so we then reserve it after freeing it :-)
 	 */
 	free_bootmem(memory_start, memory_end - memory_start);
 	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);

 #if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
 	if ((initrd_start > 0) && (initrd_start < initrd_end) &&
 			(initrd_end < memory_end))
 		reserve_bootmem(initrd_start, initrd_end - initrd_start,
 				 BOOTMEM_DEFAULT);
 #endif /* if defined(CONFIG_BLK_DEV_INITRD) */

 	/*
 	 * Get kmalloc into gear.
 	 */
 	paging_init();
 }

 /*
  *	Get CPU information for use by the procfs.
  */
 static int show_cpuinfo(struct seq_file *m, void *v)
 {
 	char *cpu, *mmu, *fpu;
 	u_long clockfreq;

 	cpu = CPU_NAME;
 	mmu = "none";
 	fpu = "none";
 	clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;

 	seq_printf(m, "CPU:\t\t%s\n"
 		      "MMU:\t\t%s\n"
 		      "FPU:\t\t%s\n"
 		      "Clocking:\t%lu.%1luMHz\n"
 		      "BogoMips:\t%lu.%02lu\n"
 		      "Calibration:\t%lu loops\n",
 		      cpu, mmu, fpu,
 		      clockfreq / 1000000,
 		      (clockfreq / 100000) % 10,
 		      (loops_per_jiffy * HZ) / 500000,
 		      ((loops_per_jiffy * HZ) / 5000) % 100,
 		      (loops_per_jiffy * HZ));

 	return 0;
 }

 static void *c_start(struct seq_file *m, loff_t *pos)
 {
 	return *pos < NR_CPUS ? ((void *) 0x12345678) : NULL;
 }

 static void *c_next(struct seq_file *m, void *v, loff_t *pos)
 {
 	++*pos;
 	return c_start(m, pos);
 }

 static void c_stop(struct seq_file *m, void *v)
 {
 }

 const struct seq_operations cpuinfo_op = {
 	.start	= c_start,
 	.next	= c_next,
 	.stop	= c_stop,
 	.show	= show_cpuinfo,
 };
	/*
	* linux/arch/m68knommu/kernel/setup.c
	*
	* Copyright (C) 1999-2007 Greg Ungerer (gerg@snapgear.com)
	* Copyright (C) 1998,1999 D. Jeff Dionne <jeff@uClinux.org>
	* Copyleft ()) 2000 James D. Schettine {james@telos-systems.com}
	* Copyright (C) 1998 Kenneth Albanowski <kjahds@kjahds.com>
	* Copyright (C) 1995 Hamish Macdonald
	* Copyright (C) 2000 Lineo Inc. (www.lineo.com)
	* Copyright (C) 2001 Lineo, Inc. <www.lineo.com>
	*
	* 68VZ328 Fixes/support Evan Stawnyczy <e@lineo.ca>
	*/

	/*
	* This file handles the architecture-dependent parts of system setup
	*/

	#include <linux/kernel.h>
	#include <linux/sched.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/fb.h>
	#include <linux/module.h>
	#include <linux/mm.h>
	#include <linux/console.h>
	#include <linux/errno.h>
	#include <linux/string.h>
	#include <linux/bootmem.h>
	#include <linux/seq_file.h>
	#include <linux/init.h>
	#include <linux/initrd.h>
	#include <linux/root_dev.h>
	#include <linux/rtc.h>

	#include <asm/setup.h>
	#include <asm/irq.h>
	#include <asm/machdep.h>
	#include <asm/pgtable.h>
	#include <asm/sections.h>

	unsigned long memory_start;
	unsigned long memory_end;

	EXPORT_SYMBOL(memory_start);
	EXPORT_SYMBOL(memory_end);

	char __initdata command_line[COMMAND_LINE_SIZE];

	/* machine dependent timer functions */
	void (*mach_sched_init)(irq_handler_t handler) __initdata = NULL;
	int (*mach_set_clock_mmss)(unsigned long);
	int (mach_hwclk) (int, struct rtc_time);

	/* machine dependent reboot functions */
	void (*mach_reset)(void);
	void (*mach_halt)(void);
	void (*mach_power_off)(void);

	#ifdef CONFIG_M68328
	#define CPU_NAME "MC68328"
	#endif
	#ifdef CONFIG_M68EZ328
	#define CPU_NAME "MC68EZ328"
	#endif
	#ifdef CONFIG_M68VZ328
	#define CPU_NAME "MC68VZ328"
	#endif
	#ifdef CONFIG_M68360
	#define CPU_NAME "MC68360"
	#endif
	#ifndef CPU_NAME
	#define CPU_NAME "UNKNOWN"
	#endif

	/*
	* Different cores have different instruction execution timings.
	* The old/traditional 68000 cores are basically all the same, at 16.
	* The ColdFire cores vary a little, their values are defined in their
	* headers. We default to the standard 68000 value here.
	*/
	#ifndef CPU_INSTR_PER_JIFFY
	#define CPU_INSTR_PER_JIFFY 16
	#endif

	#if defined(CONFIG_UBOOT)
	/*
	* parse_uboot_commandline
	*
	* Copies u-boot commandline arguments and store them in the proper linux
	* variables.
	*
	* Assumes:
	* _init_sp global contains the address in the stack pointer when the
	* kernel starts (see head.S::_start)
	*
	* U-Boot calling convention:
	* (*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
	*
	* _init_sp can be parsed as such
	*
	* _init_sp+00 = u-boot cmd after jsr into kernel (skip)
	* _init_sp+04 = &kernel board_info (residual data)
	* _init_sp+08 = &initrd_start
	* _init_sp+12 = &initrd_end
	* _init_sp+16 = &cmd_start
	* _init_sp+20 = &cmd_end
	*
	* This also assumes that the memory locations pointed to are still
	* unmodified. U-boot places them near the end of external SDRAM.
	*
	* Argument(s):
	* commandp = the linux commandline arg container to fill.
	* size = the sizeof commandp.
	*
	* Returns:
	*/
	void parse_uboot_commandline(char *commandp, int size)
	{
	extern unsigned long _init_sp;
	unsigned long *sp;
	unsigned long uboot_kbd;
	unsigned long uboot_initrd_start, uboot_initrd_end;
	unsigned long uboot_cmd_start, uboot_cmd_end;


	sp = (unsigned long *)_init_sp;
	uboot_kbd = sp[1];
	uboot_initrd_start = sp[2];
	uboot_initrd_end = sp[3];
	uboot_cmd_start = sp[4];
	uboot_cmd_end = sp[5];

	if (uboot_cmd_start && uboot_cmd_end)
	strncpy(commandp, (const char *)uboot_cmd_start, size);
	#if defined(CONFIG_BLK_DEV_INITRD)
	if (uboot_initrd_start && uboot_initrd_end &&
	(uboot_initrd_end > uboot_initrd_start)) {
	initrd_start = uboot_initrd_start;
	initrd_end = uboot_initrd_end;
	ROOT_DEV = Root_RAM0;
	printk(KERN_INFO "initrd at 0x%lx:0x%lx\n",
	initrd_start, initrd_end);
	}
	#endif /* if defined(CONFIG_BLK_DEV_INITRD) */
	}
	#endif /* #if defined(CONFIG_UBOOT) */

	void __init setup_arch(char **cmdline_p)
	{
	int bootmap_size;

	memory_start = PAGE_ALIGN(_ramstart);
	memory_end = _ramend;

	init_mm.start_code = (unsigned long) &_stext;
	init_mm.end_code = (unsigned long) &_etext;
	init_mm.end_data = (unsigned long) &_edata;
	init_mm.brk = (unsigned long) 0;

	config_BSP(&command_line[0], sizeof(command_line));

	#if defined(CONFIG_BOOTPARAM)
	strncpy(&command_line[0], CONFIG_BOOTPARAM_STRING, sizeof(command_line));
	command_line[sizeof(command_line) - 1] = 0;
	#endif /* CONFIG_BOOTPARAM */

	#if defined(CONFIG_UBOOT)
	/* CONFIG_UBOOT and CONFIG_BOOTPARAM defined, concatenate cmdline */
	#if defined(CONFIG_BOOTPARAM)
	/* Add the whitespace separator */
	command_line[strlen(CONFIG_BOOTPARAM_STRING)] = ' ';
	/* Parse uboot command line into the rest of the buffer */
	parse_uboot_commandline(
	&command_line[(strlen(CONFIG_BOOTPARAM_STRING)+1)],
	(sizeof(command_line) -
	(strlen(CONFIG_BOOTPARAM_STRING)+1)));
	/* Only CONFIG_UBOOT defined, create cmdline */
	#else
	parse_uboot_commandline(&command_line[0], sizeof(command_line));
	#endif /* CONFIG_BOOTPARAM */
	command_line[sizeof(command_line) - 1] = 0;
	#endif /* CONFIG_UBOOT */

	printk(KERN_INFO "\x0F\r\n\nuClinux/" CPU_NAME "\n");

	#ifdef CONFIG_UCDIMM
	printk(KERN_INFO "uCdimm by Lineo, Inc. <www.lineo.com>\n");
	#endif
	#ifdef CONFIG_M68VZ328
	printk(KERN_INFO "M68VZ328 support by Evan Stawnyczy <e@lineo.ca>\n");
	#endif
	#ifdef CONFIG_COLDFIRE
	printk(KERN_INFO "COLDFIRE port done by Greg Ungerer, gerg@snapgear.com\n");
	#ifdef CONFIG_M5307
	printk(KERN_INFO "Modified for M5307 by Dave Miller, dmiller@intellistor.com\n");
	#endif
	#ifdef CONFIG_ELITE
	printk(KERN_INFO "Modified for M5206eLITE by Rob Scott, rscott@mtrob.fdns.net\n");
	#endif
	#endif
	printk(KERN_INFO "Flat model support (C) 1998,1999 Kenneth Albanowski, D. Jeff Dionne\n");

	#if defined( CONFIG_PILOT ) && defined( CONFIG_M68328 )
	printk(KERN_INFO "TRG SuperPilot FLASH card support <info@trgnet.com>\n");
	#endif
	#if defined( CONFIG_PILOT ) && defined( CONFIG_M68EZ328 )
	printk(KERN_INFO "PalmV support by Lineo Inc. <jeff@uclinux.com>\n");
	#endif
	#if defined (CONFIG_M68360)
	printk(KERN_INFO "QUICC port done by SED Systems <hamilton@sedsystems.ca>,\n");
	printk(KERN_INFO "based on 2.0.38 port by Lineo Inc. <mleslie@lineo.com>.\n");
	#endif
	#ifdef CONFIG_DRAGEN2
	printk(KERN_INFO "DragonEngine II board support by Georges Menie\n");
	#endif
	#ifdef CONFIG_M5235EVB
	printk(KERN_INFO "Motorola M5235EVB support (C)2005 Syn-tech Systems, Inc. (Jate Sujjavanich)\n");
	#endif

	pr_debug("KERNEL -> TEXT=0x%06x-0x%06x DATA=0x%06x-0x%06x "
	"BSS=0x%06x-0x%06x\n", (int) &_stext, (int) &_etext,
	(int) &_sdata, (int) &_edata,
	(int) &_sbss, (int) &_ebss);
	pr_debug("MEMORY -> ROMFS=0x%06x-0x%06x MEM=0x%06x-0x%06x\n ",
	(int) &_ebss, (int) memory_start,
	(int) memory_start, (int) memory_end);

	/* Keep a copy of command line */
	*cmdline_p = &command_line[0];
	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
	boot_command_line[COMMAND_LINE_SIZE-1] = 0;

	#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
	conswitchp = &dummy_con;
	#endif

	/*
	* Give all the memory to the bootmap allocator, tell it to put the
	* boot mem_map at the start of memory.
	*/
	bootmap_size = init_bootmem_node(
	NODE_DATA(0),
	memory_start >> PAGE_SHIFT, /* map goes here */
	PAGE_OFFSET >> PAGE_SHIFT, /* 0 on coldfire */
	memory_end >> PAGE_SHIFT);
	/*
	* Free the usable memory, we have to make sure we do not free
	* the bootmem bitmap so we then reserve it after freeing it :-)
	*/
	free_bootmem(memory_start, memory_end - memory_start);
	reserve_bootmem(memory_start, bootmap_size, BOOTMEM_DEFAULT);

	#if defined(CONFIG_UBOOT) && defined(CONFIG_BLK_DEV_INITRD)
	if ((initrd_start > 0) && (initrd_start < initrd_end) &&
	(initrd_end < memory_end))
	reserve_bootmem(initrd_start, initrd_end - initrd_start,
	BOOTMEM_DEFAULT);
	#endif /* if defined(CONFIG_BLK_DEV_INITRD) */

	/*
	* Get kmalloc into gear.
	*/
	paging_init();
	}

	/*
	* Get CPU information for use by the procfs.
	*/
	static int show_cpuinfo(struct seq_file m, void v)
	{
	char cpu, mmu, *fpu;
	u_long clockfreq;

	cpu = CPU_NAME;
	mmu = "none";
	fpu = "none";
	clockfreq = (loops_per_jiffy * HZ) * CPU_INSTR_PER_JIFFY;

	seq_printf(m, "CPU:\t\t%s\n"
	"MMU:\t\t%s\n"
	"FPU:\t\t%s\n"
	"Clocking:\t%lu.%1luMHz\n"
	"BogoMips:\t%lu.%02lu\n"
	"Calibration:\t%lu loops\n",
	cpu, mmu, fpu,
	clockfreq / 1000000,
	(clockfreq / 100000) % 10,
	(loops_per_jiffy * HZ) / 500000,
	((loops_per_jiffy * HZ) / 5000) % 100,
	(loops_per_jiffy * HZ));

	return 0;
	}

	static void c_start(struct seq_file m, loff_t *pos)
	{
	return pos < NR_CPUS ? ((void ) 0x12345678) : NULL;
	}

	static void c_next(struct seq_file m, void v, loff_t pos)
	{
	++*pos;
	return c_start(m, pos);
	}

	static void c_stop(struct seq_file m, void v)
	{
	}

	const struct seq_operations cpuinfo_op = {
	.start = c_start,
	.next = c_next,
	.stop = c_stop,
	.show = show_cpuinfo,
	};