[ubicom32]: move new files out from platform support patch

[openwrt/svn-archive/archive.git] / target / linux / ubicom32 / files / arch / ubicom32 / include / asm / page.h

diff --git a/target/linux/ubicom32/files/arch/ubicom32/include/asm/page.h b/target/linux/ubicom32/files/arch/ubicom32/include/asm/page.h
new file mode 100644 (file)
index 0000000..89c6ce6
--- /dev/null
+++ b/target/linux/ubicom32/files/arch/ubicom32/include/asm/page.h
@@ -0,0 +1,106 @@
+/*
+ * arch/ubicom32/include/asm/page.h
+ *   Memory page related operations and definitions.
+ *
+ * (C) Copyright 2009, Ubicom, Inc.
+ *
+ * This file is part of the Ubicom32 Linux Kernel Port.
+ *
+ * The Ubicom32 Linux Kernel Port is free software: you can redistribute
+ * it and/or modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Ubicom32 Linux Kernel Port is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ * the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with the Ubicom32 Linux Kernel Port.  If not,
+ * see <http://www.gnu.org/licenses/>.
+ *
+ * Ubicom32 implementation derived from (with many thanks):
+ *   arch/m68knommu
+ *   arch/blackfin
+ *   arch/parisc
+ */
+#ifndef _ASM_UBICOM32_PAGE_H
+#define _ASM_UBICOM32_PAGE_H
+
+/* PAGE_SHIFT determines the page size */
+
+#define PAGE_SHIFT     12
+#define PAGE_SIZE      (1 << PAGE_SHIFT)
+#define PAGE_MASK      (~(PAGE_SIZE-1))
+
+#include <asm/setup.h>
+
+#ifndef __ASSEMBLY__
+
+#define get_user_page(vaddr)           __get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)     free_page(addr)
+
+#define clear_page(page)       memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)     memcpy((to), (from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg)       clear_page(page)
+#define copy_user_page(to, from, vaddr, pg)    copy_page(to, from)
+
+#define __alloc_zeroed_user_highpage(movableflags, vma, vaddr) \
+       alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO | movableflags, vma, vaddr)
+#define __HAVE_ARCH_ALLOC_ZEROED_USER_HIGHPAGE
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd[16]; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+typedef struct page *pgtable_t;
+
+#define pte_val(x)     ((x).pte)
+#define pmd_val(x)     ((&x)->pmd[0])
+#define pgd_val(x)     ((x).pgd)
+#define pgprot_val(x)  ((x).pgprot)
+
+#define __pte(x)       ((pte_t) { (x) } )
+#define __pmd(x)       ((pmd_t) { (x) } )
+#define __pgd(x)       ((pgd_t) { (x) } )
+#define __pgprot(x)    ((pgprot_t) { (x) } )
+
+extern unsigned long memory_start;
+extern unsigned long memory_end;
+
+#endif /* !__ASSEMBLY__ */
+
+#include <asm/page_offset.h>
+
+#define PAGE_OFFSET            (PAGE_OFFSET_RAW)
+
+#ifndef __ASSEMBLY__
+
+#define __pa(vaddr)            virt_to_phys((void *)(vaddr))
+#define __va(paddr)            phys_to_virt((unsigned long)(paddr))
+
+#define virt_to_pfn(kaddr)     (__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_virt(pfn)       __va((pfn) << PAGE_SHIFT)
+
+#define virt_to_page(addr)     (mem_map + (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT))
+#define page_to_virt(page)     ((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
+
+#define pfn_to_page(pfn)       virt_to_page(pfn_to_virt(pfn))
+#define page_to_pfn(page)      virt_to_pfn(page_to_virt(page))
+#define pfn_valid(pfn)         ((pfn) < max_mapnr)
+
+#define        virt_addr_valid(kaddr)  (((void *)(kaddr) >= (void *)PAGE_OFFSET) && \
+                               ((void *)(kaddr) < (void *)memory_end))
+
+#endif /* __ASSEMBLY__ */
+
+#ifdef __KERNEL__
+#include <asm-generic/page.h>
+#endif
+
+#endif /* _ASM_UBICOM32_PAGE_H */