proc.c

Linux内核源代码 为压缩文件 是<<Linux内核>>一书中的源代码

/* $Id: proc.c,v 1.1 1999/09/28 22:25:51 ralf Exp $
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1995, 1996, 1999 Ralf Baechle
 *
 * XXX Rewrite this mess.
 */
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <asm/bootinfo.h>
#include <asm/mipsregs.h>
#include <asm/processor.h>
#include <asm/watch.h>

unsigned long unaligned_instructions;
unsigned int vced_count, vcei_count;

/*
 * 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 **start, off_t offset, int count)
{
	char fmt [64];
	struct cpuinfo_mips *c = cpu_data;
	size_t len = 0;
  int n;

  for (n = 0; n < smp_num_cpus; n++, c++) {
		len += sprintf(buffer + len, "processor\t\t: %d\n", n);
		len += sprintf(buffer + len, "vendor_id\t\t: MIPS\n");
		len += sprintf(buffer + len, "model name\t\t: R10000\n");
/*		len += sprintf(buffer + len, "cpu model\t\t: %s V%d.%d\n",
	               cpu_name[mips_cputype <= CPU_LAST ?
	                        mips_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_sec + 2500) / 500000,
	               ((loops_per_sec + 2500) / 5000) % 100);
/*		len += sprintf(buffer + len, "Number of cpus\t\t: %d\n", smp_num_cpus);*/
#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",
	               wait_available ? "yes" : "no");
		len += sprintf(buffer + len, "microsecond timers\t: %s\n",
	               cyclecounter_available ? "yes" : "no");
		len += sprintf(buffer + len, "extra interrupt vector\t: %s\n",
	               dedicated_iv_available ? "yes" : "no");
		len += sprintf(buffer + len, "hardware watchpoint\t: %s\n",
	               watch_available ? "yes" : "no");

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

		if (len < offset)
			offset -= len, len = 0;
		else if (len >= offset + count)
			goto leave_loop;
	}

leave_loop:
	*start = buffer + offset;
	len -= offset;
	if (len < 0)
		len = 0;
	return len > count ? count : len;

}

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