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kernel add
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/*
* arch/arm/include/asm/pgtable-nommu.h
*
* Copyright (C) 1995-2002 Russell King
* Copyright (C) 2004 Hyok S. Choi
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASMARM_PGTABLE_NOMMU_H
#define _ASMARM_PGTABLE_NOMMU_H
#ifndef __ASSEMBLY__
#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/page.h>
/*
* 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)
/* FIXME */
/*
* PMD_SHIFT determines the size of the area a second-level page table can map
* PGDIR_SHIFT determines what a third-level page table entry can map
*/
#define PGDIR_SHIFT 21
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/* FIXME */
#define PAGE_NONE __pgprot(0)
#define PAGE_SHARED __pgprot(0)
#define PAGE_COPY __pgprot(0)
#define PAGE_READONLY __pgprot(0)
#define PAGE_KERNEL __pgprot(0)
#define swapper_pg_dir ((pgd_t *) 0)
#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 })
typedef pte_t *pte_addr_t;
/*
* 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))
/*
* Mark the prot value as uncacheable and unbufferable.
*/
#define pgprot_noncached(prot) __pgprot(0)
#define pgprot_writecombine(prot) __pgprot(0)
#define pgprot_dmacoherent(prot) __pgprot(0)
/*
* These would be in other places but having them here reduces the diffs.
*/
extern unsigned int kobjsize(const void *objp);
/*
* No page table caches to initialise.
*/
#define pgtable_cache_init() do { } while (0)
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.
*/
#define VMALLOC_START 0UL
#define VMALLOC_END 0xffffffffUL
#define FIRST_USER_ADDRESS 0UL
#include <asm-generic/pgtable.h>
#else
/*
* dummy tlb and user structures.
*/
#define v3_tlb_fns (0)
#define v4_tlb_fns (0)
#define v4wb_tlb_fns (0)
#define v4wbi_tlb_fns (0)
#define v6wbi_tlb_fns (0)
#define v7wbi_tlb_fns (0)
#define v3_user_fns (0)
#define v4_user_fns (0)
#define v4_mc_user_fns (0)
#define v4wb_user_fns (0)
#define v4wt_user_fns (0)
#define v6_user_fns (0)
#define xscale_mc_user_fns (0)
#endif /*__ASSEMBLY__*/
#endif /* _ASMARM_PGTABLE_H */
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