/*
 * POWER Data Stream Control Register (DSCR)
 *
 * This header file contains helper functions and macros
 * required for all the DSCR related test cases.
 *
 * Copyright 2012, Anton Blanchard, IBM Corporation.
 * Copyright 2015, Anshuman Khandual, IBM Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation.
 */
#ifndef _SELFTESTS_POWERPC_DSCR_DSCR_H
#define _SELFTESTS_POWERPC_DSCR_DSCR_H

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <dirent.h>
#include <pthread.h>
#include <sched.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>

#include "utils.h"

#define THREADS		100	/* Max threads */
#define COUNT		100	/* Max iterations */
#define DSCR_MAX	16	/* Max DSCR value */
#define LEN_MAX		100	/* Max name length */

#define DSCR_DEFAULT	"/sys/devices/system/cpu/dscr_default"
#define CPU_PATH	"/sys/devices/system/cpu/"

#define rmb()  asm volatile("lwsync":::"memory")
#define wmb()  asm volatile("lwsync":::"memory")

#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x))

/* Prilvilege state DSCR access */
inline unsigned long get_dscr(void)
{
	unsigned long ret;

	asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR_PRIV));

	return ret;
}

inline void set_dscr(unsigned long val)
{
	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR_PRIV));
}

/* Problem state DSCR access */
inline unsigned long get_dscr_usr(void)
{
	unsigned long ret;

	asm volatile("mfspr %0,%1" : "=r" (ret) : "i" (SPRN_DSCR));

	return ret;
}

inline void set_dscr_usr(unsigned long val)
{
	asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
}

/* Default DSCR access */
unsigned long get_default_dscr(void)
{
	int fd = -1, ret;
	char buf[16];
	unsigned long val;

	if (fd == -1) {
		fd = open(DSCR_DEFAULT, O_RDONLY);
		if (fd == -1) {
			perror("open() failed");
			exit(1);
		}
	}
	memset(buf, 0, sizeof(buf));
	lseek(fd, 0, SEEK_SET);
	ret = read(fd, buf, sizeof(buf));
	if (ret == -1) {
		perror("read() failed");
		exit(1);
	}
	sscanf(buf, "%lx", &val);
	close(fd);
	return val;
}

void set_default_dscr(unsigned long val)
{
	int fd = -1, ret;
	char buf[16];

	if (fd == -1) {
		fd = open(DSCR_DEFAULT, O_RDWR);
		if (fd == -1) {
			perror("open() failed");
			exit(1);
		}
	}
	sprintf(buf, "%lx\n", val);
	ret = write(fd, buf, strlen(buf));
	if (ret == -1) {
		perror("write() failed");
		exit(1);
	}
	close(fd);
}

double uniform_deviate(int seed)
{
	return seed * (1.0 / (RAND_MAX + 1.0));
}
#endif	/* _SELFTESTS_POWERPC_DSCR_DSCR_H */
it/log/sound?id=29ba6e7400a317725bdfb86a725d1824447dbcd7'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?id=29ba6e7400a317725bdfb86a725d1824447dbcd7'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/adi?id=29ba6e7400a317725bdfb86a725d1824447dbcd7'>adi</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/adi?id=29ba6e7400a317725bdfb86a725d1824447dbcd7&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
t/commit/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db'>perf-probe.txt</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='383378d115ab6e702d77896071d36056875602db'/><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'>2017-01-05 10:29:40 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-01-05 10:29:40 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db'>383378d115ab6e702d77896071d36056875602db</a> (<a href='/cgit.cgi/linux/net-next.git/patch/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=383378d115ab6e702d77896071d36056875602db'>1dce033018c7b3946a9ed249f851752e265ed010</a> /<a href='/cgit.cgi/linux/net-next.git/tree/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db'>tools/perf/Documentation/perf-probe.txt</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/Documentation/perf-probe.txt?id=9e3596b0c6539e28546ff7c72a06576627068353'>9e3596b0c6539e28546ff7c72a06576627068353</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db&amp;id2=9e3596b0c6539e28546ff7c72a06576627068353'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/tools/perf/Documentation/perf-probe.txt?id=0b47a6bd1150f4846b1d61925a4cc5a96593a541'>0b47a6bd1150f4846b1d61925a4cc5a96593a541</a> (<a href='/cgit.cgi/linux/net-next.git/diff/tools/perf/Documentation/perf-probe.txt?id=383378d115ab6e702d77896071d36056875602db&amp;id2=0b47a6bd1150f4846b1d61925a4cc5a96593a541'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'for-linus-4.10-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip</div><div class='commit-msg'>Pull xen fixes and cleanups from Juergen Gross:

 - small fixes for xenbus driver

 - one fix for xen dom0 boot on huge system

 - small cleanups

* tag 'for-linus-4.10-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  Xen: ARM: Zero reserved fields of xatp before making hypervisor call
  xen: events: Replace BUG() with BUG_ON()
  xen: remove stale xs_input_avail() from header
  xen: return xenstore command failures via response instead of rc
  xen: xenbus driver must not accept invalid transaction ids
  xen/evtchn: use rb_entry()
  xen/setup: Don't relocate p2m over existing one
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=383378d115ab6e702d77896071d36056875602db'>Diffstat</a> (limited to 'tools/perf/Documentation/perf-probe.txt')</div><table summary='diffstat' class='diffstat'>