/*
 *  (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
 *
 *  Licensed under the terms of the GNU GPL License version 2.
 *
 * Based on code found in
 * linux/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
 * and originally developed by Paul Devriendt
 */

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>

#include <sys/types.h>
#include <sys/stat.h>

#define MCPU 32

#define MSR_FIDVID_STATUS	0xc0010042

#define MSR_S_HI_CURRENT_VID	0x0000001f
#define MSR_S_LO_CURRENT_FID	0x0000003f

static int get_fidvid(uint32_t cpu, uint32_t *fid, uint32_t *vid)
{
	int err = 1;
	uint64_t msr = 0;
	int fd;
	char file[20];

	if (cpu > MCPU)
		goto out;

	sprintf(file, "/dev/cpu/%d/msr", cpu);

	fd = open(file, O_RDONLY);
	if (fd < 0)
		goto out;
	lseek(fd, MSR_FIDVID_STATUS, SEEK_CUR);
	if (read(fd, &msr, 8) != 8)
		goto err1;

	*fid = ((uint32_t )(msr & 0xffffffffull)) & MSR_S_LO_CURRENT_FID;
	*vid = ((uint32_t )(msr>>32 & 0xffffffffull)) & MSR_S_HI_CURRENT_VID;
	err = 0;
err1:
	close(fd);
out:
	return err;
}


/* Return a frequency in MHz, given an input fid */
static uint32_t find_freq_from_fid(uint32_t fid)
{
	return 800 + (fid * 100);
}

/* Return a voltage in miliVolts, given an input vid */
static uint32_t find_millivolts_from_vid(uint32_t vid)
{
	return 1550-vid*25;
}

int main (int argc, char *argv[])
{
	int err;
	int cpu;
	uint32_t fid, vid;

	if (argc < 2)
		cpu = 0;
	else
		cpu = strtoul(argv[1], NULL, 0);

	err = get_fidvid(cpu, &fid, &vid);

	if (err) {
		printf("can't get fid, vid from MSR\n");
		printf("Possible trouble: you don't run a powernow-k8 capable cpu\n");
		printf("or you are not root, or the msr driver is not present\n");
		exit(1);
	}

	
	printf("cpu %d currently at %d MHz and %d mV\n",
			cpu,
			find_freq_from_fid(fid),
			find_millivolts_from_vid(vid));
	
	return 0;
}
t/tree/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>tree</a><a class='active' href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/serial/quatech2.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>serial</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>quatech2.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='883af14e67e8b8702b5560aa64c888c0cd0bd66c'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-24 16:54:39 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-24 16:54:39 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>883af14e67e8b8702b5560aa64c888c0cd0bd66c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/serial/quatech2.c?id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>74e3a6b53f5fad9f7848ab1b9f6921b7012940a4</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>drivers/usb/serial/quatech2.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=0263d4ebd94b36280608e296cba39b924b6e832b'>0263d4ebd94b36280608e296cba39b924b6e832b</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c&amp;id2=0263d4ebd94b36280608e296cba39b924b6e832b'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=aab45453ff5c77200c6da4ac909f7a4392aed17e'>aab45453ff5c77200c6da4ac909f7a4392aed17e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/serial/quatech2.c?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c&amp;id2=aab45453ff5c77200c6da4ac909f7a4392aed17e'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge branch 'akpm' (patches from Andrew)</div><div class='commit-msg'>Merge fixes from Andrew Morton:
 "26 fixes"

* emailed patches from Andrew Morton &lt;akpm@linux-foundation.org&gt;: (26 commits)
  MAINTAINERS: add Dan Streetman to zbud maintainers
  MAINTAINERS: add Dan Streetman to zswap maintainers
  mm: do not export ioremap_page_range symbol for external module
  mn10300: fix build error of missing fpu_save()
  romfs: use different way to generate fsid for BLOCK or MTD
  frv: add missing atomic64 operations
  mm, page_alloc: fix premature OOM when racing with cpuset mems update
  mm, page_alloc: move cpuset seqcount checking to slowpath
  mm, page_alloc: fix fast-path race with cpuset update or removal
  mm, page_alloc: fix check for NULL preferred_zone
  kernel/panic.c: add missing \n
  fbdev: color map copying bounds checking
  frv: add atomic64_add_unless()
  mm/mempolicy.c: do not put mempolicy before using its nodemask
  radix-tree: fix private list warnings
  Documentation/filesystems/proc.txt: add VmPin
  mm, memcg: do not retry precharge charges
  proc: add a schedule point in proc_pid_readdir()
  mm: alloc_contig: re-allow CMA to compact FS pages
  mm/slub.c: trace free objects at KERN_INFO
  ...
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=883af14e67e8b8702b5560aa64c888c0cd0bd66c'>Diffstat</a> (limited to 'drivers/usb/serial/quatech2.c')</div><table summary='diffstat' class='diffstat'>