Current (FEC from 2.6.31 port, no CAN, no I2C, no PCI)

[mcf548x/linux.git] / arch / m68k / include / asm / mcf_pgalloc.h

diff --git a/arch/m68k/include/asm/mcf_pgalloc.h b/arch/m68k/include/asm/mcf_pgalloc.h
new file mode 100644 (file)
index 0000000..88089c7
--- /dev/null
+++ b/arch/m68k/include/asm/mcf_pgalloc.h
@@ -0,0 +1,103 @@
+#ifndef _MCF_PGALLOC_H
+#define _MCF_PGALLOC_H
+
+#include <asm/coldfire.h>
+#include <asm/page.h>
+#include <asm/mcf_tlbflush.h>
+#include <asm/cacheflush.h>
+
+extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+       free_page((unsigned long) pte);
+}
+
+extern const char bad_pmd_string[];
+
+extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
+       unsigned long address)
+{
+       unsigned long page = __get_free_page(GFP_DMA|__GFP_REPEAT);
+
+       if (!page)
+               return NULL;
+
+       memset((void *)page, 0, PAGE_SIZE);
+       return (pte_t *) (page);
+}
+
+extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
+{
+       return (pmd_t *) pgd;
+}
+
+#define pmd_alloc_one_fast(mm, address) ({ BUG(); ((pmd_t *)1); })
+#define pmd_alloc_one(mm, address)      ({ BUG(); ((pmd_t *)2); })
+
+#define pte_alloc_one_fast(mm, addr) pte_alloc_one(mm, addr)
+
+#define pmd_populate(mm, pmd, page) (pmd_val(*pmd) = \
+       (unsigned long)(page_address(page)))
+
+#define pmd_populate_kernel(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
+
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *page)
+{
+       __free_page(page);
+}
+
+#define __pmd_free_tlb(tlb, pmd) do { } while (0)
+
+static inline struct page *pte_alloc_one(struct mm_struct *mm,
+       unsigned long address)
+{
+       struct page *page = alloc_pages(GFP_DMA|__GFP_REPEAT, 0);
+       pte_t *pte;
+
+       if (!page)
+               return NULL;
+
+       pte = kmap(page);
+       if (pte) {
+               clear_page(pte);
+               __flush_page_to_ram(pte);
+               flush_tlb_kernel_page(pte);
+               nocache_page(pte);
+       }
+       kunmap(pte);
+
+       return page;
+}
+
+extern inline void pte_free(struct mm_struct *mm, struct page *page)
+{
+       __free_page(page);
+}
+
+/*
+ * In our implementation, each pgd entry contains 1 pmd that is never allocated
+ * or freed.  pgd_present is always 1, so this should never be called. -NL
+ */
+#define pmd_free(mm, pmd) BUG()
+
+extern inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+       free_page((unsigned long) pgd);
+}
+
+extern inline pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+     pgd_t *new_pgd;
+
+     new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
+     if (!new_pgd)
+            return NULL;
+     memcpy(new_pgd, swapper_pg_dir, PAGE_SIZE);
+     memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
+     return new_pgd;
+}
+
+#define pgd_populate(mm, pmd, pte) BUG()
+
+#endif /* _MCF_PGALLOC_H */