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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_
/* 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))
typedef struct _DLIST_ENTRY {
struct _DLIST_ENTRY *Flink;
struct _DLIST_ENTRY *Blink;
} DLIST_ENTRY;
typedef struct {
unsigned char Data[16];
} GUID;
struct osd_waitevent {
int condition;
wait_queue_head_t event;
};
/* Osd routines */
extern void *osd_VirtualAllocExec(unsigned int size);
extern void *osd_PageAlloc(unsigned int count);
extern void osd_PageFree(void *page, unsigned int count);
extern struct osd_waitevent *osd_WaitEventCreate(void);
extern void osd_WaitEventSet(struct osd_waitevent *waitEvent);
extern int osd_WaitEventWait(struct osd_waitevent *waitEvent);
/* If >0, waitEvent got signaled. If ==0, timeout. If < 0, error */
extern int osd_WaitEventWaitEx(struct osd_waitevent *waitEvent,
u32 TimeoutInMs);
int osd_schedule_callback(struct workqueue_struct *wq,
void (*func)(void *),
void *data);
#endif /* _OSD_H_ */
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