mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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250089c5e9
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19823 3c298f89-4303-0410-b956-a3cf2f4a3e73
129 lines
4.0 KiB
C
129 lines
4.0 KiB
C
/*
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* arch/ubicom32/include/asm/pgtable.h
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* Ubicom32 pseudo page table definitions and operations.
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*
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* (C) Copyright 2009, Ubicom, Inc.
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* Copyright (C) 2004 Microtronix Datacom Ltd
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Ubicom32 implementation derived from (with many thanks):
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* arch/m68knommu
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* arch/blackfin
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* arch/parisc
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* and various works, Alpha, ix86, M68K, Sparc, ...et al
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*/
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#ifndef _ASM_UBICOM32_PGTABLE_H
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#define _ASM_UBICOM32_PGTABLE_H
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#include <asm-generic/4level-fixup.h>
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//vic - this bit copied from m68knommu version
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#include <asm/setup.h>
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#include <asm/io.h>
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#include <linux/sched.h>
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typedef pte_t *pte_addr_t;
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#define pgd_present(pgd) (1) /* pages are always present on NO_MM */
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#define pgd_none(pgd) (0)
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#define pgd_bad(pgd) (0)
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#define pgd_clear(pgdp)
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#define kern_addr_valid(addr) (1)
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#define pmd_offset(a, b) ((void *)0)
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#define PAGE_NONE __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_SHARED __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_COPY __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_READONLY __pgprot(0) /* these mean nothing to NO_MM */
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#define PAGE_KERNEL __pgprot(0) /* these mean nothing to NO_MM */
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//vic - this bit copied from m68knommu version
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extern void paging_init(void);
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#define swapper_pg_dir ((pgd_t *) 0)
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#define __swp_type(x) (0)
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#define __swp_offset(x) (0)
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#define __swp_entry(typ,off) ((swp_entry_t) { ((typ) | ((off) << 7)) })
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#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
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#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
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/*
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* pgprot_noncached() is only for infiniband pci support, and a real
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* implementation for RAM would be more complicated.
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*/
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#define pgprot_noncached(prot) (prot)
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static inline int pte_file(pte_t pte) { return 0; }
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/*
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* ZERO_PAGE is a global shared page that is always zero: used
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* for zero-mapped memory areas etc..
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*/
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#define ZERO_PAGE(vaddr) (virt_to_page(0))
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extern unsigned int kobjsize(const void *objp);
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extern int is_in_rom(unsigned long);
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/*
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* No page table caches to initialise
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*/
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#define pgtable_cache_init() do { } while (0)
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#define io_remap_pfn_range(vma, vaddr, pfn, size, prot) \
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remap_pfn_range(vma, vaddr, pfn, size, prot)
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extern inline void flush_cache_mm(struct mm_struct *mm)
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{
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}
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extern inline void flush_cache_range(struct mm_struct *mm,
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unsigned long start,
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unsigned long end)
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{
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}
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/* Push the page at kernel virtual address and clear the icache */
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extern inline void flush_page_to_ram (unsigned long address)
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{
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}
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/* Push n pages at kernel virtual address and clear the icache */
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extern inline void flush_pages_to_ram (unsigned long address, int n)
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{
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}
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/*
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* All 32bit addresses are effectively valid for vmalloc...
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* Sort of meaningless for non-VM targets.
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*/
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#define VMALLOC_START 0
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#define VMALLOC_END 0xffffffff
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,32)
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#include <asm-generic/pgtable.h>
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#else
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#define arch_enter_lazy_mmu_mode() do {} while (0)
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#define arch_leave_lazy_mmu_mode() do {} while (0)
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#define arch_flush_lazy_mmu_mode() do {} while (0)
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#define arch_enter_lazy_cpu_mode() do {} while (0)
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#define arch_leave_lazy_cpu_mode() do {} while (0)
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#define arch_flush_lazy_cpu_mode() do {} while (0)
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#endif
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#endif /* _ASM_UBICOM32_PGTABLE_H */
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