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/*
*
* Copyright (c) 2009, Microsoft Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
* Authors:
* Haiyang Zhang <haiyangz@microsoft.com>
* Hank Janssen <hjanssen@microsoft.com>
*
*/
#ifndef _OSD_H_
#define _OSD_H_
#include <linux/workqueue.h>
/* Defines */
#define ALIGN_UP(value, align) (((value) & (align-1)) ? \
(((value) + (align-1)) & ~(align-1)) : \
(value))
#define ALIGN_DOWN(value, align) ((value) & ~(align-1))
#define NUM_PAGES_SPANNED(addr, len) ((ALIGN_UP(addr+len, PAGE_SIZE) - \
ALIGN_DOWN(addr, PAGE_SIZE)) >> \
PAGE_SHIFT)
#define LOWORD(dw) ((unsigned short)(dw))
#define HIWORD(dw) ((unsigned short)(((unsigned int) (dw) >> 16) & 0xFFFF))
struct hv_guid {
unsigned char data[16];
};
struct osd_waitevent {
int condition;
wait_queue_head_t event;
};
/* Osd routines */
extern void *osd_virtual_alloc_exec(unsigned int size);
extern void *osd_page_alloc(unsigned int count);
extern void osd_page_free(void *page, unsigned int count);
extern struct osd_waitevent *osd_waitevent_create(void);
extern void osd_waitevent_set(struct osd_waitevent *wait_event);
extern int osd_waitevent_wait(struct osd_waitevent *wait_event);
/* If >0, wait_event got signaled. If ==0, timeout. If < 0, error */
extern int osd_waitevent_waitex(struct osd_waitevent *wait_event,
u32 timeout_in_ms);
#endif /* _OSD_H_ */
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