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/*-
 * Copyright (c) 2008 Kip Macy
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 */

#ifndef XENVAR_H_
#define XENVAR_H_

#include <machine/xen/features.h>

#if defined(XEN)

#define XBOOTUP 0x1
#define XPMAP   0x2
extern int xendebug_flags;
#ifndef NOXENDEBUG
#define XENPRINTF printk
#else
#define XENPRINTF printf
#endif

extern	xen_pfn_t *xen_phys_machine;
extern	xen_pfn_t *xen_pfn_to_mfn_frame_list[16];
extern	xen_pfn_t *xen_pfn_to_mfn_frame_list_list;

#if 0
#define TRACE_ENTER XENPRINTF("(file=%s, line=%d) entered %s\n", __FILE__, __LINE__, __FUNCTION__)
#define TRACE_EXIT XENPRINTF("(file=%s, line=%d) exiting %s\n", __FILE__, __LINE__, __FUNCTION__)
#define TRACE_DEBUG(argflags, _f, _a...) \
if (xendebug_flags & argflags) XENPRINTF("(file=%s, line=%d) " _f "\n", __FILE__, __LINE__, ## _a);
#else
#define TRACE_ENTER
#define TRACE_EXIT
#define TRACE_DEBUG(argflags, _f, _a...)
#endif

extern xen_pfn_t *xen_machine_phys;
/* Xen starts physical pages after the 4MB ISA hole -
 * FreeBSD doesn't
 */


#undef ADD_ISA_HOLE /* XXX */

#ifdef ADD_ISA_HOLE
#define ISA_INDEX_OFFSET 1024 
#define ISA_PDR_OFFSET 1
#else
#define ISA_INDEX_OFFSET 0
#define ISA_PDR_OFFSET 0
#endif


#define PFNTOMFN(i) (xen_phys_machine[(i)])
#define MFNTOPFN(i) ((vm_paddr_t)xen_machine_phys[(i)])

#define VTOP(x) ((((uintptr_t)(x))) - KERNBASE)
#define PTOV(x) (((uintptr_t)(x)) + KERNBASE)

#define VTOPFN(x) (VTOP(x) >> PAGE_SHIFT)
#define PFNTOV(x) PTOV((vm_paddr_t)(x)  << PAGE_SHIFT)

#define VTOMFN(va) (vtomach(va) >> PAGE_SHIFT)
#define PFN_UP(x)    (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)

#define phystomach(pa) (((vm_paddr_t)(PFNTOMFN((pa) >> PAGE_SHIFT))) << PAGE_SHIFT)
#define machtophys(ma) (((vm_paddr_t)(MFNTOPFN((ma) >> PAGE_SHIFT))) << PAGE_SHIFT)


void xpq_init(void);

#define BITS_PER_LONG 32
#define NR_CPUS      XEN_LEGACY_MAX_VCPUS

#define BITS_TO_LONGS(bits) \
	(((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
#define DECLARE_BITMAP(name,bits) \
	unsigned long name[BITS_TO_LONGS(bits)]

int  xen_create_contiguous_region(vm_page_t pages, int npages);

void  xen_destroy_contiguous_region(void * addr, int npages);

#elif defined(XENHVM)

#if !defined(PAE)
#define	vtomach(va)	pmap_kextract((vm_offset_t) (va))
#endif
#define	PFNTOMFN(pa)	(pa)
#define	MFNTOPFN(ma)	(ma)

#define	set_phys_to_machine(pfn, mfn)		((void)0)
#define	phys_to_machine_mapping_valid(pfn)	(TRUE)

#endif /* !XEN && !XENHVM */

#endif