proc.c

上传linux-jx2410的源代码

/*
 *  linux/arch/mips/kernel/proc.c
 *
 *  Copyright (C) 1995, 1996, 2001  Ralf Baechle
 *  Copyright (C) 2001  MIPS Technologies, Inc.
 */
#include <linux/config.h>
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/bootinfo.h>
#include <asm/cpu.h>
#include <asm/mipsregs.h>
#include <asm/processor.h>
#include <asm/watch.h>

extern unsigned long unaligned_instructions;
unsigned int vced_count, vcei_count;
#ifndef CONFIG_CPU_HAS_LLSC
unsigned long ll_ops, sc_ops;
#endif

/*
 * BUFFER is PAGE_SIZE bytes long.
 *
 * Currently /proc/cpuinfo is being abused to print data about the
 * number of date/instruction cacheflushes.
 */
int get_cpuinfo(char *buffer)
{
	char fmt [64];
	const char *cpu_name[] = CPU_NAMES;
	const char *mach_group_names[] = GROUP_NAMES;
	const char *mach_unknown_names[] = GROUP_UNKNOWN_NAMES;
	const char *mach_jazz_names[] = GROUP_JAZZ_NAMES;
	const char *mach_dec_names[] = GROUP_DEC_NAMES;
	const char *mach_arc_names[] = GROUP_ARC_NAMES;
	const char *mach_sni_rm_names[] = GROUP_SNI_RM_NAMES;
	const char *mach_acn_names[] = GROUP_ACN_NAMES;
	const char *mach_sgi_names[] = GROUP_SGI_NAMES;
	const char *mach_cobalt_names[] = GROUP_COBALT_NAMES;
	const char *mach_nec_ddb_names[] = GROUP_NEC_DDB_NAMES;
	const char *mach_baget_names[] = GROUP_BAGET_NAMES;
	const char *mach_cosine_names[] = GROUP_COSINE_NAMES;
	const char *mach_galileo_names[] = GROUP_GALILEO_NAMES;
	const char *mach_momenco_names[] = GROUP_MOMENCO_NAMES;
 	const char *mach_ite_names[] = GROUP_ITE_NAMES;
	const char *mach_philips_names[] = GROUP_PHILIPS_NAMES;
 	const char *mach_globespan_names[] = GROUP_GLOBESPAN_NAMES;
	const char *mach_sibyte_names[] = GROUP_SIBYTE_NAMES;
	const char *mach_toshiba_names[] = GROUP_TOSHIBA_NAMES;
	const char *mach_alchemy_names[] = GROUP_ALCHEMY_NAMES;
	const char **mach_group_to_name[] = { mach_unknown_names,
		mach_jazz_names, mach_dec_names, mach_arc_names,
		mach_sni_rm_names, mach_acn_names, mach_sgi_names,
		mach_cobalt_names, mach_nec_ddb_names, mach_baget_names,
		mach_cosine_names, mach_galileo_names, mach_momenco_names, 
		mach_ite_names, mach_philips_names, mach_globespan_names,
		mach_sibyte_names, mach_toshiba_names, mach_alchemy_names};
	unsigned int version = read_32bit_cp0_register(CP0_PRID);
	int len;

	len = sprintf(buffer, "cpu\t\t\t: MIPS\n");
	len += sprintf(buffer + len, "cpu model\t\t: %s V%d.%d\n",
	               cpu_name[mips_cpu.cputype <= CPU_LAST ?
	                        mips_cpu.cputype : CPU_UNKNOWN],
	               (version >> 4) & 0x0f, version & 0x0f);
	len += sprintf(buffer + len, "system type\t\t: %s %s\n",
		       mach_group_names[mips_machgroup],
		       mach_group_to_name[mips_machgroup][mips_machtype]);
	len += sprintf(buffer + len, "BogoMIPS\t\t: %lu.%02lu\n",
		       loops_per_jiffy/(500000/HZ),
		       (loops_per_jiffy/(5000/HZ)) % 100);

#if defined (__MIPSEB__)
	len += sprintf(buffer + len, "byteorder\t\t: big endian\n");
#endif
#if defined (__MIPSEL__)
	len += sprintf(buffer + len, "byteorder\t\t: little endian\n");
#endif
	len += sprintf(buffer + len, "unaligned accesses\t: %lu\n",
		       unaligned_instructions);
	len += sprintf(buffer + len, "wait instruction\t: %s\n",
	               cpu_wait ? "yes" : "no");
	len += sprintf(buffer + len, "microsecond timers\t: %s\n",
	               (mips_cpu.options & MIPS_CPU_COUNTER) ? "yes" : "no");
	len += sprintf(buffer + len, "extra interrupt vector\t: %s\n",
	               (mips_cpu.options & MIPS_CPU_DIVEC) ? "yes" : "no");
	len += sprintf(buffer + len, "hardware watchpoint\t: %s\n",
	               watch_available ? "yes" : "no");

	sprintf(fmt, "VCE%%c exceptions\t\t: %s\n",
	        (mips_cpu.options & MIPS_CPU_VCE) ? "%d" : "not available");
	len += sprintf(buffer + len, fmt, 'D', vced_count);
	len += sprintf(buffer + len, fmt, 'I', vcei_count);

#ifndef CONFIG_CPU_HAS_LLSC
	len += sprintf(buffer + len, "ll emulations\t\t: %lu\n",
		       ll_ops);
	len += sprintf(buffer + len, "sc emulations\t\t: %lu\n",
		       sc_ops);
#endif
	return len;
}

void init_irq_proc(void)
{
	/* Nothing, for now.  */
}