xen: make grant table arch portable
split out x86 specific part from grant-table.c and
allow ia64/xen specific initialization.
ia64/xen grant table is based on pseudo physical address
(guest physical address) unlike x86/xen. On ia64 init_mm
doesn't map identity straight mapped area.
ia64/xen specific grant table initialization is necessary.
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index d282292..4662048 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -103,6 +103,12 @@
void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid,
unsigned long pfn);
+int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
+ unsigned long max_nr_gframes,
+ struct grant_entry **__shared);
+void arch_gnttab_unmap_shared(struct grant_entry *shared,
+ unsigned long nr_gframes);
+
#define gnttab_map_vaddr(map) ((void *)(map.host_virt_addr))
#endif /* __ASM_GNTTAB_H__ */