forked from Minki/linux
002547b4f8
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>
124 lines
2.9 KiB
C
124 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 */
|