[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);
unsigned long __mfn_to_pfn(unsigned long mfn);
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)
{
	unsigned long pfn;

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

	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_pfn(v)          (PFN_DOWN(__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;
}

static inline int m2p_add_override(unsigned long mfn, struct page *page,
		struct gnttab_map_grant_ref *kmap_op)
{
	return 0;
}

static inline int m2p_remove_override(struct page *page, bool clear_pte)
{
	return 0;
}

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));

#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 SS	35	unsigned long __pfn_to_mfn(unsigned long pfn);
	36	unsigned long __mfn_to_pfn(unsigned long mfn);
	37	extern struct rb_root phys_to_mach;
	38
	39	static inline unsigned long pfn_to_mfn(unsigned long pfn)
	40	{
	41	unsigned long mfn;
e1d8f62a	42
4a19138c SS	43	if (phys_to_mach.rb_node != NULL) {
	44	mfn = __pfn_to_mfn(pfn);
	45	if (mfn != INVALID_P2M_ENTRY)
	46	return mfn;
	47	}
	48
18c51e1a	49	return pfn;
4a19138c SS	50	}
	51
	52	static inline unsigned long mfn_to_pfn(unsigned long mfn)
	53	{
	54	unsigned long pfn;
	55
	56	if (phys_to_mach.rb_node != NULL) {
	57	pfn = __mfn_to_pfn(mfn);
	58	if (pfn != INVALID_P2M_ENTRY)
	59	return pfn;
	60	}
	61
18c51e1a	62	return mfn;
4a19138c SS	63	}
	64
	65	#define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn)
	66
36a67abc SS	67	static inline xmaddr_t phys_to_machine(xpaddr_t phys)
	68	{
	69	unsigned offset = phys.paddr & ~PAGE_MASK;
	70	return XMADDR(PFN_PHYS(pfn_to_mfn(PFN_DOWN(phys.paddr))) \| offset);
	71	}
	72
	73	static inline xpaddr_t machine_to_phys(xmaddr_t machine)
	74	{
	75	unsigned offset = machine.maddr & ~PAGE_MASK;
	76	return XPADDR(PFN_PHYS(mfn_to_pfn(PFN_DOWN(machine.maddr))) \| offset);
	77	}
	78	/* VIRT <-> MACHINE conversion */
	79	#define virt_to_machine(v) (phys_to_machine(XPADDR(__pa(v))))
	80	#define virt_to_pfn(v) (PFN_DOWN(__pa(v)))
	81	#define virt_to_mfn(v) (pfn_to_mfn(virt_to_pfn(v)))
	82	#define mfn_to_virt(m) (__va(mfn_to_pfn(m) << PAGE_SHIFT))
	83
	84	static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr)
	85	{
	86	/* TODO: assuming it is mapped in the kernel 1:1 */
	87	return virt_to_machine(vaddr);
	88	}
	89
	90	/* TODO: this shouldn't be here but it is because the frontend drivers
	91	* are using it (its rolled in headers) even though we won't hit the code path.
	92	* So for right now just punt with this.
	93	*/
	94	static inline pte_t lookup_address(unsigned long address, unsigned int level)
	95	{
	96	BUG();
	97	return NULL;
	98	}
	99
	100	static inline int m2p_add_override(unsigned long mfn, struct page *page,
	101	struct gnttab_map_grant_ref *kmap_op)
	102	{
	103	return 0;
	104	}
	105
	106	static inline int m2p_remove_override(struct page *page, bool clear_pte)
	107	{
	108	return 0;
	109	}
	110
4a19138c SS	111	bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
	112	bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn,
	113	unsigned long nr_pages);
ee7b5958	114
36a67abc SS	115	static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn)
36a67abc SS	116	{
ee7b5958	117	return __set_phys_to_machine(pfn, mfn);
36a67abc	118	}
3216dceb	119
0a5ccc86	120	#define xen_remap(cookie, size) ioremap_cache((cookie), (size));
3216dceb	121
36a67abc	122	#endif /* _ASM_ARM_XEN_PAGE_H */