3 * Copyright (c) 2009, Microsoft Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 * Haiyang Zhang <haiyangz@microsoft.com>
20 * Hank Janssen <hjanssen@microsoft.com>
28 #include <linux/kernel.h>
29 #include <linux/workqueue.h>
32 #define NUM_PAGES_SPANNED(addr, len) ((PAGE_ALIGN(addr + len) >> PAGE_SHIFT) - \
35 #define LOWORD(dw) ((unsigned short)(dw))
36 #define HIWORD(dw) ((unsigned short)(((unsigned int) (dw) >> 16) & 0xFFFF))
39 unsigned char data[16];
42 struct osd_waitevent {
44 wait_queue_head_t event;
49 extern void *osd_virtual_alloc_exec(unsigned int size);
51 extern void *osd_page_alloc(unsigned int count);
52 extern void osd_page_free(void *page, unsigned int count);
54 extern struct osd_waitevent *osd_waitevent_create(void);
55 extern void osd_waitevent_set(struct osd_waitevent *wait_event);
56 extern int osd_waitevent_wait(struct osd_waitevent *wait_event);
58 /* If >0, wait_event got signaled. If ==0, timeout. If < 0, error */
59 extern int osd_waitevent_waitex(struct osd_waitevent *wait_event,