summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h
diff options
context:
space:
mode:
authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/x86/include/asm/xen/page.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
downloadFOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/include/asm/xen/page.h')
-rw-r--r--ANDROID_3.4.5/arch/x86/include/asm/xen/page.h213
1 files changed, 0 insertions, 213 deletions
diff --git a/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h b/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h
deleted file mode 100644
index c34f96c2..00000000
--- a/ANDROID_3.4.5/arch/x86/include/asm/xen/page.h
+++ /dev/null
@@ -1,213 +0,0 @@
-#ifndef _ASM_X86_XEN_PAGE_H
-#define _ASM_X86_XEN_PAGE_H
-
-#include <linux/kernel.h>
-#include <linux/types.h>
-#include <linux/spinlock.h>
-#include <linux/pfn.h>
-#include <linux/mm.h>
-
-#include <asm/uaccess.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-
-#include <xen/interface/xen.h>
-#include <xen/grant_table.h>
-#include <xen/features.h>
-
-/* 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) })
-
-/**** MACHINE <-> PHYSICAL CONVERSION MACROS ****/
-#define INVALID_P2M_ENTRY (~0UL)
-#define FOREIGN_FRAME_BIT (1UL<<(BITS_PER_LONG-1))
-#define IDENTITY_FRAME_BIT (1UL<<(BITS_PER_LONG-2))
-#define FOREIGN_FRAME(m) ((m) | FOREIGN_FRAME_BIT)
-#define IDENTITY_FRAME(m) ((m) | IDENTITY_FRAME_BIT)
-
-/* Maximum amount of memory we can handle in a domain in pages */
-#define MAX_DOMAIN_PAGES \
- ((unsigned long)((u64)CONFIG_XEN_MAX_DOMAIN_MEMORY * 1024 * 1024 * 1024 / PAGE_SIZE))
-
-extern unsigned long *machine_to_phys_mapping;
-extern unsigned long machine_to_phys_nr;
-
-extern unsigned long get_phys_to_machine(unsigned long pfn);
-extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn);
-extern bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn);
-extern unsigned long set_phys_range_identity(unsigned long pfn_s,
- unsigned long pfn_e);
-
-extern int m2p_add_override(unsigned long mfn, struct page *page,
- struct gnttab_map_grant_ref *kmap_op);
-extern int m2p_remove_override(struct page *page, bool clear_pte);
-extern struct page *m2p_find_override(unsigned long mfn);
-extern unsigned long m2p_find_override_pfn(unsigned long mfn, unsigned long pfn);
-
-static inline unsigned long pfn_to_mfn(unsigned long pfn)
-{
- unsigned long mfn;
-
- if (xen_feature(XENFEAT_auto_translated_physmap))
- return pfn;
-
- mfn = get_phys_to_machine(pfn);
-
- if (mfn != INVALID_P2M_ENTRY)
- mfn &= ~(FOREIGN_FRAME_BIT | IDENTITY_FRAME_BIT);
-
- return mfn;
-}
-
-static inline int phys_to_machine_mapping_valid(unsigned long pfn)
-{
- if (xen_feature(XENFEAT_auto_translated_physmap))
- return 1;
-
- return get_phys_to_machine(pfn) != INVALID_P2M_ENTRY;
-}
-
-static inline unsigned long mfn_to_pfn(unsigned long mfn)
-{
- unsigned long pfn;
- int ret = 0;
-
- if (xen_feature(XENFEAT_auto_translated_physmap))
- return mfn;
-
- if (unlikely(mfn >= machine_to_phys_nr)) {
- pfn = ~0;
- goto try_override;
- }
- pfn = 0;
- /*
- * The array access can fail (e.g., device space beyond end of RAM).
- * In such cases it doesn't matter what we return (we return garbage),
- * but we must handle the fault without crashing!
- */
- ret = __get_user(pfn, &machine_to_phys_mapping[mfn]);
-try_override:
- /* ret might be < 0 if there are no entries in the m2p for mfn */
- if (ret < 0)
- pfn = ~0;
- else if (get_phys_to_machine(pfn) != mfn)
- /*
- * If this appears to be a foreign mfn (because the pfn
- * doesn't map back to the mfn), then check the local override
- * table to see if there's a better pfn to use.
- *
- * m2p_find_override_pfn returns ~0 if it doesn't find anything.
- */
- pfn = m2p_find_override_pfn(mfn, ~0);
-
- /*
- * pfn is ~0 if there are no entries in the m2p for mfn or if the
- * entry doesn't map back to the mfn and m2p_override doesn't have a
- * valid entry for it.
- */
- if (pfn == ~0 &&
- get_phys_to_machine(mfn) == IDENTITY_FRAME(mfn))
- pfn = mfn;
-
- return pfn;
-}
-
-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);
-}
-
-/*
- * We detect special mappings in one of two ways:
- * 1. If the MFN is an I/O page then Xen will set the m2p entry
- * to be outside our maximum possible pseudophys range.
- * 2. If the MFN belongs to a different domain then we will certainly
- * not have MFN in our p2m table. Conversely, if the page is ours,
- * then we'll have p2m(m2p(MFN))==MFN.
- * If we detect a special mapping then it doesn't have a 'struct page'.
- * We force !pfn_valid() by returning an out-of-range pointer.
- *
- * NB. These checks require that, for any MFN that is not in our reservation,
- * there is no PFN such that p2m(PFN) == MFN. Otherwise we can get confused if
- * we are foreign-mapping the MFN, and the other domain as m2p(MFN) == PFN.
- * Yikes! Various places must poke in INVALID_P2M_ENTRY for safety.
- *
- * NB2. When deliberately mapping foreign pages into the p2m table, you *must*
- * use FOREIGN_FRAME(). This will cause pte_pfn() to choke on it, as we
- * require. In all the cases we care about, the FOREIGN_FRAME bit is
- * masked (e.g., pfn_to_mfn()) so behaviour there is correct.
- */
-static inline unsigned long mfn_to_local_pfn(unsigned long mfn)
-{
- unsigned long pfn = mfn_to_pfn(mfn);
- if (get_phys_to_machine(pfn) != mfn)
- return -1; /* force !pfn_valid() */
- return pfn;
-}
-
-/* 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 unsigned long pte_mfn(pte_t pte)
-{
- return (pte.pte & PTE_PFN_MASK) >> PAGE_SHIFT;
-}
-
-static inline pte_t mfn_pte(unsigned long page_nr, pgprot_t pgprot)
-{
- pte_t pte;
-
- pte.pte = ((phys_addr_t)page_nr << PAGE_SHIFT) |
- massage_pgprot(pgprot);
-
- return pte;
-}
-
-static inline pteval_t pte_val_ma(pte_t pte)
-{
- return pte.pte;
-}
-
-static inline pte_t __pte_ma(pteval_t x)
-{
- return (pte_t) { .pte = x };
-}
-
-#define pmd_val_ma(v) ((v).pmd)
-#ifdef __PAGETABLE_PUD_FOLDED
-#define pud_val_ma(v) ((v).pgd.pgd)
-#else
-#define pud_val_ma(v) ((v).pud)
-#endif
-#define __pmd_ma(x) ((pmd_t) { (x) } )
-
-#define pgd_val_ma(x) ((x).pgd)
-
-void xen_set_domain_pte(pte_t *ptep, pte_t pteval, unsigned domid);
-
-xmaddr_t arbitrary_virt_to_machine(void *address);
-unsigned long arbitrary_virt_to_mfn(void *vaddr);
-void make_lowmem_page_readonly(void *vaddr);
-void make_lowmem_page_readwrite(void *vaddr);
-
-#endif /* _ASM_X86_XEN_PAGE_H */