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/*
* Copyright (C) 2006-2009, 2011 Free Software Foundation
*
* 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 the program ; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _MACH_XEN_H
#define _MACH_XEN_H
#ifdef MACH_XEN
#include <sys/types.h>
#include <xen/public/xen.h>
#include <i386/vm_param.h>
extern struct start_info boot_info;
extern volatile struct shared_info hyp_shared_info;
#ifdef MACH_PV_PAGETABLES
/* Memory translations */
/* pa are physical addresses, from 0 to size of memory */
/* ma are machine addresses, i.e. _real_ hardware adresses */
/* la are linear addresses, i.e. without segmentation */
/* This might also be useful out of Xen */
#if VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS
extern unsigned long la_shift;
#else
#define la_shift LINEAR_MIN_KERNEL_ADDRESS
#endif
#define la_to_pa(a) ((vm_offset_t)(((vm_offset_t)(a)) - la_shift))
#define pa_to_la(a) ((vm_offset_t)(((vm_offset_t)(a)) + la_shift))
#define kv_to_la(a) pa_to_la(_kvtophys(a))
#define la_to_kv(a) phystokv(la_to_pa(a))
#ifdef MACH_PSEUDO_PHYS
#if PAE
#define PFN_LIST MACH2PHYS_VIRT_START_PAE
#else
#define PFN_LIST MACH2PHYS_VIRT_START_NONPAE
#endif
#if VM_MIN_KERNEL_ADDRESS != LINEAR_MIN_KERNEL_ADDRESS
extern unsigned long *pfn_list;
#else
#define pfn_list ((unsigned long *) PFN_LIST)
#endif
#define mfn_to_pfn(n) (pfn_list[n])
extern unsigned long *mfn_list;
#define pfn_to_mfn(n) (mfn_list[n])
#else
#define mfn_to_pfn(n) (n)
#define pfn_to_mfn(n) (n)
#endif /* MACH_PSEUDO_PHYS */
#define pa_to_mfn(a) (pfn_to_mfn(atop(a)))
#ifdef PAE
#define pa_to_ma(a) ({ vm_offset_t __a = (vm_offset_t) (a); (((pt_entry_t) pa_to_mfn(__a)) << PAGE_SHIFT) | (__a & PAGE_MASK); })
#define ma_to_pa(a) ({ pt_entry_t __a = (pt_entry_t) (a); (mfn_to_pfn(__a >> PAGE_SHIFT) << PAGE_SHIFT) | (__a & PAGE_MASK); })
#else
#define pa_to_ma(a) ({ vm_offset_t __a = (vm_offset_t) (a); ptoa(pa_to_mfn(__a)) | (__a & PAGE_MASK); })
#define ma_to_pa(a) ({ vm_offset_t __a = (vm_offset_t) (a); (mfn_to_pfn(atop((__a))) << PAGE_SHIFT) | (__a & PAGE_MASK); })
#endif
#define kv_to_mfn(a) pa_to_mfn(_kvtophys(a))
#define kv_to_ma(a) pa_to_ma(_kvtophys(a))
#else /* MACH_PV_PAGETABLES */
#define mfn_to_pfn(n) (n)
#define pfn_to_mfn(n) (n)
#endif /* MACH_PV_PAGETABLES */
#define mfn_to_kv(mfn) phystokv(ptoa(mfn_to_pfn(mfn)))
#include <machine/xen.h>
#endif /* MACH_XEN */
#endif /* _MACH_XEN_H */
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