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#ifndef _XEN_P2M_H
#define _XEN_P2M_H
#include <xen/mm.h>
struct domain;
/* Per-p2m-table state */
struct p2m_domain {
/* Lock that protects updates to the p2m */
spinlock_t lock;
/* Pages used to construct the p2m */
struct page_list_head pages;
/* Root of p2m page tables, 2 contiguous pages */
struct page_info *first_level;
/* Current VMID in use */
uint8_t vmid;
};
/* Init the datastructures for later use by the p2m code */
int p2m_init(struct domain *d);
/* Allocate a new p2m table for a domain.
*
* Returns 0 for success or -errno.
*/
int p2m_alloc_table(struct domain *d);
/* */
void p2m_load_VTTBR(struct domain *d);
/* Setup p2m RAM mapping for domain d from start-end. */
int p2m_populate_ram(struct domain *d, paddr_t start, paddr_t end);
/* Map MMIO regions in the p2m: start_gaddr and end_gaddr is the range
* in the guest physical address space to map, starting from the machine
* address maddr. */
int map_mmio_regions(struct domain *d, paddr_t start_gaddr,
paddr_t end_gaddr, paddr_t maddr);
unsigned long gmfn_to_mfn(struct domain *d, unsigned long gpfn);
/*
* Populate-on-demand
*/
/* Call when decreasing memory reservation to handle PoD entries properly.
* Will return '1' if all entries were handled and nothing more need be done.*/
int
p2m_pod_decrease_reservation(struct domain *d,
xen_pfn_t gpfn,
unsigned int order);
/* Compatibility function exporting the old untyped interface */
static inline unsigned long get_gfn_untyped(struct domain *d, unsigned long gpfn)
{
return gmfn_to_mfn(d, gpfn);
}
int get_page_type(struct page_info *page, unsigned long type);
int is_iomem_page(unsigned long mfn);
static inline int get_page_and_type(struct page_info *page,
struct domain *domain,
unsigned long type)
{
int rc = get_page(page, domain);
if ( likely(rc) && unlikely(!get_page_type(page, type)) )
{
put_page(page);
rc = 0;
}
return rc;
}
#endif /* _XEN_P2M_H */
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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