1 files changed, 96 insertions, 0 deletions

diff --git a/include/asm-blackfin/pgtable.h b/include/asm-blackfin/pgtable.h
new file mode 100644
index 000000000000..5a8f9e431c40
--- /dev/null
+++ b/include/asm-blackfin/pgtable.h
@@ -0,0 +1,96 @@
+#ifndef _BLACKFIN_PGTABLE_H
+#define _BLACKFIN_PGTABLE_H
+
+#include <asm-generic/4level-fixup.h>
+
+#include <asm/page.h>
+#include <asm/cplb.h>
+
+typedef pte_t *pte_addr_t;
+/*
+* Trivial page table functions.
+*/
+#define pgd_present(pgd)        (1)
+#define pgd_none(pgd)           (0)
+#define pgd_bad(pgd)            (0)
+#define pgd_clear(pgdp)
+#define kern_addr_valid(addr)   (1)
+
+#define pmd_offset(a, b)        ((void *)0)
+#define pmd_none(x)             (!pmd_val(x))
+#define pmd_present(x)          (pmd_val(x))
+#define pmd_clear(xp)           do { set_pmd(xp, __pmd(0)); } while (0)
+#define pmd_bad(x)              (pmd_val(x) & ~PAGE_MASK)
+
+#define kern_addr_valid(addr) (1)
+
+#define PAGE_NONE               __pgprot(0)     /* these mean nothing to NO_MM */
+#define PAGE_SHARED             __pgprot(0)     /* these mean nothing to NO_MM */
+#define PAGE_COPY               __pgprot(0)     /* these mean nothing to NO_MM */
+#define PAGE_READONLY           __pgprot(0)     /* these mean nothing to NO_MM */
+#define PAGE_KERNEL             __pgprot(0)     /* these mean nothing to NO_MM */
+
+extern void paging_init(void);
+
+#define __swp_type(x)           (0)
+#define __swp_offset(x)         (0)
+#define __swp_entry(typ,off)    ((swp_entry_t) { ((typ) | ((off) << 7)) })
+#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
+#define __swp_entry_to_pte(x)   ((pte_t) { (x).val })
+
+static inline int pte_file(pte_t pte)
+{
+        return 0;
+}
+
+#define set_pte(pteptr, pteval) (*(pteptr) = pteval)
+#define set_pte_at(mm, addr, ptep, pteval) set_pte(ptep, pteval)
+
+/*
+ * Page assess control based on Blackfin CPLB management
+ */
+#define _PAGE_RD        (CPLB_USER_RD)
+#define _PAGE_WR        (CPLB_USER_WR)
+#define _PAGE_USER      (CPLB_USER_RD | CPLB_USER_WR)
+#define _PAGE_ACCESSED  CPLB_ALL_ACCESS
+#define _PAGE_DIRTY     (CPLB_DIRTY)
+
+#define PTE_BIT_FUNC(fn, op) \
+        static inline pte_t pte_##fn(pte_t _pte) { _pte.pte op; return _pte; }
+
+PTE_BIT_FUNC(rdprotect, &= ~_PAGE_RD);
+PTE_BIT_FUNC(mkread, |= _PAGE_RD);
+PTE_BIT_FUNC(wrprotect, &= ~_PAGE_WR);
+PTE_BIT_FUNC(mkwrite, |= _PAGE_WR);
+PTE_BIT_FUNC(exprotect, &= ~_PAGE_USER);
+PTE_BIT_FUNC(mkexec, |= _PAGE_USER);
+PTE_BIT_FUNC(mkclean, &= ~_PAGE_DIRTY);
+PTE_BIT_FUNC(mkdirty, |= _PAGE_DIRTY);
+PTE_BIT_FUNC(mkold, &= ~_PAGE_ACCESSED);
+PTE_BIT_FUNC(mkyoung, |= _PAGE_ACCESSED);
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+#define ZERO_PAGE(vaddr)        (virt_to_page(0))
+
+extern unsigned int kobjsize(const void *objp);
+
+#define swapper_pg_dir ((pgd_t *) 0)
+/*
+ * No page table caches to initialise.
+ */
+#define pgtable_cache_init()    do { } while (0)
+#define io_remap_pfn_range      remap_pfn_range
+
+/*
+ * All 32bit addresses are effectively valid for vmalloc...
+ * Sort of meaningless for non-VM targets.
+ */
+#define VMALLOC_START   0
+#define VMALLOC_END     0xffffffff
+
+#include <asm-generic/pgtable.h>
+
+#endif                          /* _BLACKFIN_PGTABLE_H */