diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/mach/xen.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/include/mach/xen.h b/include/mach/xen.h new file mode 100644 index 0000000..f954701 --- /dev/null +++ b/include/mach/xen.h @@ -0,0 +1,80 @@ + +/* + * Copyright (C) 2006 Samuel Thibault <samuel.thibault@ens-lyon.org> + * + * 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; + +/* 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))) +#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((vm_offset_t)(__a))) << PAGE_SHIFT) | (__a & PAGE_MASK); }) + +#define kv_to_mfn(a) pa_to_mfn(_kvtophys(a)) +#define kv_to_ma(a) pa_to_ma(_kvtophys(a)) +#define mfn_to_kv(mfn) (phystokv(ma_to_pa(ptoa(mfn)))) + +#include <machine/xen.h> + +#endif /* MACH_XEN */ +#endif /* _MACH_XEN_H */ |