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/******************************************************************************
* xen/xen-os.h
*
* Random collection of macros and definition
*
* Copyright (c) 2003, 2004 Keir Fraser (on behalf of the Xen team)
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* $FreeBSD$
*/
#ifndef _XEN_XEN_OS_H_
#define _XEN_XEN_OS_H_
#if !defined(__XEN_INTERFACE_VERSION__)
#define __XEN_INTERFACE_VERSION__ 0x00030208
#endif
#define GRANT_REF_INVALID 0xffffffff
#ifdef LOCORE
#define __ASSEMBLY__
#endif
#include <machine/xen/xen-os.h>
#include <xen/interface/xen.h>
/* Everything below this point is not included by assembler (.S) files. */
#ifndef __ASSEMBLY__
extern shared_info_t *HYPERVISOR_shared_info;
extern start_info_t *HYPERVISOR_start_info;
/* XXX: we need to get rid of this and use HYPERVISOR_start_info directly */
extern char *console_page;
extern int xen_disable_pv_disks;
extern int xen_disable_pv_nics;
enum xen_domain_type {
XEN_NATIVE, /* running on bare hardware */
XEN_PV_DOMAIN, /* running in a PV domain */
XEN_HVM_DOMAIN, /* running in a Xen hvm domain */
};
extern enum xen_domain_type xen_domain_type;
static inline int
xen_domain(void)
{
return (xen_domain_type != XEN_NATIVE);
}
static inline int
xen_pv_domain(void)
{
return (xen_domain_type == XEN_PV_DOMAIN);
}
static inline int
xen_hvm_domain(void)
{
return (xen_domain_type == XEN_HVM_DOMAIN);
}
static inline bool
xen_initial_domain(void)
{
return (xen_domain() && HYPERVISOR_start_info != NULL &&
(HYPERVISOR_start_info->flags & SIF_INITDOMAIN) != 0);
}
/*
* Based on ofed/include/linux/bitops.h
*
* Those helpers are prefixed by xen_ because xen-os.h is widely included
* and we don't want the other drivers using them.
*
*/
#define NBPL (NBBY * sizeof(long))
static inline bool
xen_test_bit(int bit, volatile long *addr)
{
unsigned long mask = 1UL << (bit % NBPL);
return !!(atomic_load_acq_long(&addr[bit / NBPL]) & mask);
}
static inline void
xen_set_bit(int bit, volatile long *addr)
{
atomic_set_long(&addr[bit / NBPL], 1UL << (bit % NBPL));
}
static inline void
xen_clear_bit(int bit, volatile long *addr)
{
atomic_clear_long(&addr[bit / NBPL], 1UL << (bit % NBPL));
}
#undef NPBL
/*
* Functions to allocate/free unused memory in order
* to map memory from other domains.
*/
struct resource *xenmem_alloc(device_t dev, int *res_id, size_t size);
int xenmem_free(device_t dev, int res_id, struct resource *res);
/* Debug/emergency function, prints directly to hypervisor console */
void xc_printf(const char *, ...) __printflike(1, 2);
#ifndef xen_mb
#define xen_mb() mb()
#endif
#ifndef xen_rmb
#define xen_rmb() rmb()
#endif
#ifndef xen_wmb
#define xen_wmb() wmb()
#endif
#endif /* !__ASSEMBLY__ */
#endif /* _XEN_XEN_OS_H_ */
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