/**
 * \file drm_os_linux.h
 * OS abstraction macros.
 */

#include <linux/interrupt.h>	/* For task queue support */
#include <linux/delay.h>

#ifndef readq
static inline u64 readq(void __iomem *reg)
{
	return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
}

static inline void writeq(u64 val, void __iomem *reg)
{
	writel(val & 0xffffffff, reg);
	writel(val >> 32, reg + 0x4UL);
}
#endif

/** Current process ID */
#define DRM_CURRENTPID			task_pid_nr(current)
#define DRM_UDELAY(d)			udelay(d)
/** Read a byte from a MMIO region */
#define DRM_READ8(map, offset)		readb(((void __iomem *)(map)->handle) + (offset))
/** Read a word from a MMIO region */
#define DRM_READ16(map, offset)         readw(((void __iomem *)(map)->handle) + (offset))
/** Read a dword from a MMIO region */
#define DRM_READ32(map, offset)		readl(((void __iomem *)(map)->handle) + (offset))
/** Write a byte into a MMIO region */
#define DRM_WRITE8(map, offset, val)	writeb(val, ((void __iomem *)(map)->handle) + (offset))
/** Write a word into a MMIO region */
#define DRM_WRITE16(map, offset, val)   writew(val, ((void __iomem *)(map)->handle) + (offset))
/** Write a dword into a MMIO region */
#define DRM_WRITE32(map, offset, val)	writel(val, ((void __iomem *)(map)->handle) + (offset))

/** Read a qword from a MMIO region - be careful using these unless you really understand them */
#define DRM_READ64(map, offset)		readq(((void __iomem *)(map)->handle) + (offset))
/** Write a qword into a MMIO region */
#define DRM_WRITE64(map, offset, val)	writeq(val, ((void __iomem *)(map)->handle) + (offset))

#define DRM_WAIT_ON( ret, queue, timeout, condition )		\
do {								\
	DECLARE_WAITQUEUE(entry, current);			\
	unsigned long end = jiffies + (timeout);		\
	add_wait_queue(&(queue), &entry);			\
								\
	for (;;) {						\
		__set_current_state(TASK_INTERRUPTIBLE);	\
		if (condition)					\
			break;					\
		if (time_after_eq(jiffies, end)) {		\
			ret = -EBUSY;				\
			break;					\
		}						\
		schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);	\
		if (signal_pending(current)) {			\
			ret = -EINTR;				\
			break;					\
		}						\
	}							\
	__set_current_state(TASK_RUNNING);			\
	remove_wait_queue(&(queue), &entry);			\
} while (0)
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>include</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>xen</a>/<a href='/cgit.cgi/linux/net-next.git/commit/include/xen/xenbus_dev.h?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>xenbus_dev.h</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='69973b830859bc6529a7a0468ba0d80ee5117826'/><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'>2016-12-11 11:17:54 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2016-12-11 11:17:54 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/xenbus_dev.h?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>69973b830859bc6529a7a0468ba0d80ee5117826</a> (<a href='/cgit.cgi/linux/net-next.git/patch/include/xen/xenbus_dev.h?id=69973b830859bc6529a7a0468ba0d80ee5117826'>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=69973b830859bc6529a7a0468ba0d80ee5117826'>5f11fe15ed9d9a3ab9c92242030e54b73ecdce45</a> /<a href='/cgit.cgi/linux/net-next.git/tree/include/xen/xenbus_dev.h?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>include/xen/xenbus_dev.h</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/include/xen/xenbus_dev.h?h=nds-private-remove&amp;id=2e4333c14de06a333783d6812cf3c4998f78b0c8'>2e4333c14de06a333783d6812cf3c4998f78b0c8</a> (<a href='/cgit.cgi/linux/net-next.git/diff/include/xen/xenbus_dev.h?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826&amp;id2=2e4333c14de06a333783d6812cf3c4998f78b0c8'>diff</a>)</td></tr></table>
<div class='commit-subject'>Linux 4.9</div><div class='commit-msg'></div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=69973b830859bc6529a7a0468ba0d80ee5117826'>Diffstat</a> (limited to 'include/xen/xenbus_dev.h')</div><table summary='diffstat' class='diffstat'>