[linux-2.6-block.git] / arch / arm / include / asm / xen / page.h

#ifndef _ASM_ARM_XEN_PAGE_H
#define _ASM_ARM_XEN_PAGE_H

#include <asm/page.h>
#include <asm/pgtable.h>

#include <linux/pfn.h>
#include <linux/types.h>
#include <linux/dma-mapping.h>

#include <xen/xen.h>
#include <xen/interface/grant_table.h>

#define phys_to_machine_mapping_valid(pfn) (1)
#define mfn_to_virt(m)			(__va(mfn_to_pfn(m) << PAGE_SHIFT))

#define pte_mfn	    pte_pfn
#define mfn_pte	    pfn_pte

/* Xen machine address */
typedef struct xmaddr {
	phys_addr_t maddr;
} xmaddr_t;

/* Xen pseudo-physical address */
typedef struct xpaddr {
	phys_addr_t paddr;
} xpaddr_t;

#define XMADDR(x)	((xmaddr_t) { .maddr = (x) })
#define XPADDR(x)	((xpaddr_t) { .paddr = (x) })

#define INVALID_P2M_ENTRY      (~0UL)

unsigned long __pfn_to_mfn(unsigned long pfn);
extern struct rb_root phys_to_mach;

static inline unsigned long pfn_to_mfn(unsigned long pfn)
{
	unsigned long mfn;

	if (phys_to_mach.rb_node != NULL) {
		mfn = __pfn_to_mfn(pfn);
		if (mfn != INVALID_P2M_ENTRY)
			return mfn;
	}

	return pfn;
}

static inline unsigned long mfn_to_pfn(unsigned long mfn)
{
	return mfn;
}

#define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn)

static inline xmaddr_t phys_to_machine(xpaddr_t phys)
{
	unsigned offset = phys.paddr & ~PAGE_MASK;
	return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) | offset);
}

static inline xpaddr_t machine_to_phys(xmaddr_t machine)
{
	unsigned offset = machine.maddr & ~PAGE_MASK;
	return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) | offset);
}
/* VIRT <-> MACHINE conversion */
#define virt_to_machine(v)	(phys_to_machine(XPADDR(__pa(v))))
#define virt_to_mfn(v)		(pfn_to_mfn(virt_to_pfn(v)))
#define mfn_to_virt(m)		(__va(mfn_to_pfn(m) << PAGE_SHIFT))

static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
{
	/* TODO: assuming it is mapped in the kernel 1:1 */
	return virt_to_machine(vaddr);
}

/* TODO: this shouldn't be here but it is because the frontend drivers
 * are using it (its rolled in headers) even though we won't hit the code path.
 * So for right now just punt with this.
 */
static inline pte_t *lookup_address(unsigned long address, unsigned int *level)
{
	BUG();
	return NULL;
}

extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
				   struct gnttab_map_grant_ref *kmap_ops,
				   struct page **pages, unsigned int count);

extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
				     struct gnttab_map_grant_ref *kmap_ops,
				     struct page **pages, unsigned int count);

bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
		unsigned long nr_pages);

static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
{
	return __set_phys_to_machine(pfn, mfn);
}

#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
#define xen_unmap(cookie) iounmap((cookie))

bool xen_arch_need_swiotlb(struct device *dev,
			   unsigned long pfn,
			   unsigned long mfn);

#endif /* _ASM_ARM_XEN_PAGE_H */
Commit	Line	Data
36a67abc SS	1	#ifndef _ASM_ARM_XEN_PAGE_H
	2	#define _ASM_ARM_XEN_PAGE_H
	3
	4	#include <asm/page.h>
	5	#include <asm/pgtable.h>
	6
	7	#include <linux/pfn.h>
	8	#include <linux/types.h>
83862ccf	9	#include <linux/dma-mapping.h>
36a67abc	10
4a19138c	11	#include <xen/xen.h>
36a67abc SS	12	#include <xen/interface/grant_table.h>
36a67abc SS	13
ee7b5958	14	#define phys_to_machine_mapping_valid(pfn) (1)
36a67abc SS	15	#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
	16
	17	#define pte_mfn pte_pfn
	18	#define mfn_pte pfn_pte
	19
	20	/* Xen machine address */
	21	typedef struct xmaddr {
	22	phys_addr_t maddr;
	23	} xmaddr_t;
	24
	25	/* Xen pseudo-physical address */
	26	typedef struct xpaddr {
	27	phys_addr_t paddr;
	28	} xpaddr_t;
	29
	30	#define XMADDR(x) ((xmaddr_t) { .maddr = (x) })
	31	#define XPADDR(x) ((xpaddr_t) { .paddr = (x) })
	32
ee7b5958 IC	33	#define INVALID_P2M_ENTRY (~0UL)
ee7b5958 IC	34
4a19138c	35	unsigned long __pfn_to_mfn(unsigned long pfn);
4a19138c SS	36	extern struct rb_root phys_to_mach;
	37
	38	static inline unsigned long pfn_to_mfn(unsigned long pfn)
	39	{
	40	unsigned long mfn;
e1d8f62a	41
4a19138c SS	42	if (phys_to_mach.rb_node != NULL) {
	43	mfn = __pfn_to_mfn(pfn);
	44	if (mfn != INVALID_P2M_ENTRY)
	45	return mfn;
	46	}
	47
18c51e1a	48	return pfn;
4a19138c SS	49	}
	50
	51	static inline unsigned long mfn_to_pfn(unsigned long mfn)
	52	{
18c51e1a	53	return mfn;
4a19138c SS	54	}
	55
	56	#define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn)
	57
36a67abc SS	58	static inline xmaddr_t phys_to_machine(xpaddr_t phys)
	59	{
	60	unsigned offset = phys.paddr & ~PAGE_MASK;
	61	return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) \| offset);
	62	}
	63
	64	static inline xpaddr_t machine_to_phys(xmaddr_t machine)
	65	{
	66	unsigned offset = machine.maddr & ~PAGE_MASK;
	67	return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) \| offset);
	68	}
	69	/* VIRT <-> MACHINE conversion */
	70	#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
36a67abc SS	71	#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
	72	#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
	73
	74	static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
	75	{
	76	/* TODO: assuming it is mapped in the kernel 1:1 */
	77	return virt_to_machine(vaddr);
	78	}
	79
	80	/* TODO: this shouldn't be here but it is because the frontend drivers
	81	* are using it (its rolled in headers) even though we won't hit the code path.
	82	* So for right now just punt with this.
	83	*/
	84	static inline pte_t lookup_address(unsigned long address, unsigned int level)
	85	{
	86	BUG();
	87	return NULL;
	88	}
	89
1429d46d ZK	90	extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops,
	91	struct gnttab_map_grant_ref *kmap_ops,
	92	struct page **pages, unsigned int count);
36a67abc	93
1429d46d ZK	94	extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops,
	95	struct gnttab_map_grant_ref *kmap_ops,
	96	struct page **pages, unsigned int count);
36a67abc	97
4a19138c SS	98	bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
	99	bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
	100	unsigned long nr_pages);
ee7b5958	101
36a67abc SS	102	static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
36a67abc SS	103	{
ee7b5958	104	return __set_phys_to_machine(pfn, mfn);
36a67abc	105	}
3216dceb	106
84621c9b	107	#define xen_remap(cookie, size) ioremap_cache((cookie), (size))
efaf30a3	108	#define xen_unmap(cookie) iounmap((cookie))
3216dceb	109
a4dba130 SS	110	bool xen_arch_need_swiotlb(struct device *dev,
	111	unsigned long pfn,
	112	unsigned long mfn);
	113
36a67abc	114	#endif /* _ASM_ARM_XEN_PAGE_H */