android_kernel_motorola_sm6225/include/asm-arm/pgtable-nommu.h
Russell King 002547b4f8 [ARM] nommu: adjust headers for !MMU ARM systems
Majorily based on Hyok Choi's patches, this fixes up the asm-arm
header files for mmuless systems.  Over and above Hyok's patches:

- nommu.h merged into mmu.h (it's only a structure)
- nommu_context.h is essentially the same as mmu_context.h, but
  without the MM switching code.

so there's no point having separate files.  Also, in memory.h,
there's no point #ifndef'ing PHYS_OFFSET and END_MEM - both
CONFIG_DRAM_BASE and CONFIG_DRAM_SIZE will always be set by the
configuration scripts.

Other files have minor formatting changes, but are essentially
the same.  Hyok's original patches were signed off thusly:

  Signed-off-by: Hyok S. Choi <hyok.choi@samsung.com>

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-06-28 17:59:45 +01:00

123 lines
2.9 KiB
C

/*
* linux/include/asm-arm/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/config.h>
#include <linux/slab.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/io.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)
//extern void paging_init(struct meminfo *, struct machine_desc *);
#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;
static inline int pte_file(pte_t pte) { return 0; }
/*
* 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)
/*
* These would be in other places but having them here reduces the diffs.
*/
extern unsigned int kobjsize(const void *objp);
extern int is_in_rom(unsigned long);
/*
* No page table caches to initialise.
*/
#define pgtable_cache_init() do { } while (0)
#define io_remap_page_range remap_page_range
#define io_remap_pfn_range remap_pfn_range
#define MK_IOSPACE_PFN(space, pfn) (pfn)
#define GET_IOSPACE(pfn) 0
#define GET_PFN(pfn) (pfn)
/*
* All 32bit addresses are effectively valid for vmalloc...
* Sort of meaningless for non-VM targets.
*/
#define VMALLOC_START 0
#define VMALLOC_END 0xffffffff
#define FIRST_USER_ADDRESS (0)
#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 v6_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 */