78 строки
2.5 KiB
C
78 строки
2.5 KiB
C
|
/*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that 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
|
||
|
|
*
|
||
|
|
* Copyright (C) IBM Corp. 2006
|
||
|
|
*
|
||
|
|
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
|
||
|
|
* Jerone Young <jyoung5@us.ibm.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_XENCOMM_H_
|
||
|
|
#define _LINUX_XENCOMM_H_
|
||
|
|
|
||
|
|
#include <xen/interface/xencomm.h>
|
||
|
|
|
||
|
|
#define XENCOMM_MINI_ADDRS 3
|
||
|
|
struct xencomm_mini {
|
||
|
|
struct xencomm_desc _desc;
|
||
|
|
uint64_t address[XENCOMM_MINI_ADDRS];
|
||
|
|
};
|
||
|
|
|
||
|
|
/* To avoid additionnal virt to phys conversion, an opaque structure is
|
||
|
|
presented. */
|
||
|
|
struct xencomm_handle;
|
||
|
|
|
||
|
|
extern void xencomm_free(struct xencomm_handle *desc);
|
||
|
|
extern struct xencomm_handle *xencomm_map(void *ptr, unsigned long bytes);
|
||
|
|
extern struct xencomm_handle *__xencomm_map_no_alloc(void *ptr,
|
||
|
|
unsigned long bytes, struct xencomm_mini *xc_area);
|
||
|
|
|
||
|
|
#if 0
|
||
|
|
#define XENCOMM_MINI_ALIGNED(xc_desc, n) \
|
||
|
|
struct xencomm_mini xc_desc ## _base[(n)] \
|
||
|
|
__attribute__((__aligned__(sizeof(struct xencomm_mini)))); \
|
||
|
|
struct xencomm_mini *xc_desc = &xc_desc ## _base[0];
|
||
|
|
#else
|
||
|
|
/*
|
||
|
|
* gcc bug workaround:
|
||
|
|
* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16660
|
||
|
|
* gcc doesn't handle properly stack variable with
|
||
|
|
* __attribute__((__align__(sizeof(struct xencomm_mini))))
|
||
|
|
*/
|
||
|
|
#define XENCOMM_MINI_ALIGNED(xc_desc, n) \
|
||
|
|
unsigned char xc_desc ## _base[((n) + 1 ) * \
|
||
|
|
sizeof(struct xencomm_mini)]; \
|
||
|
|
struct xencomm_mini *xc_desc = (struct xencomm_mini *) \
|
||
|
|
((unsigned long)xc_desc ## _base + \
|
||
|
|
(sizeof(struct xencomm_mini) - \
|
||
|
|
((unsigned long)xc_desc ## _base) % \
|
||
|
|
sizeof(struct xencomm_mini)));
|
||
|
|
#endif
|
||
|
|
#define xencomm_map_no_alloc(ptr, bytes) \
|
||
|
|
({ XENCOMM_MINI_ALIGNED(xc_desc, 1); \
|
||
|
|
__xencomm_map_no_alloc(ptr, bytes, xc_desc); })
|
||
|
|
|
||
|
|
/* provided by architecture code: */
|
||
|
|
extern unsigned long xencomm_vtop(unsigned long vaddr);
|
||
|
|
|
||
|
|
static inline void *xencomm_pa(void *ptr)
|
||
|
|
{
|
||
|
|
return (void *)xencomm_vtop((unsigned long)ptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
#define xen_guest_handle(hnd) ((hnd).p)
|
||
|
|
|
||
|
|
#endif /* _LINUX_XENCOMM_H_ */
|