forked from luck/tmp_suning_uos_patched
b4819b5937
2.6.12-git6 doesn't boot on some MIPS machines. They need the support of flat memory and discontig memory. Signed-off-by: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
152 lines
3.7 KiB
C
152 lines
3.7 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
|
|
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
|
|
*/
|
|
#ifndef _ASM_PAGE_H
|
|
#define _ASM_PAGE_H
|
|
|
|
#include <linux/config.h>
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <spaces.h>
|
|
|
|
#endif
|
|
|
|
/*
|
|
* PAGE_SHIFT determines the page size
|
|
*/
|
|
#ifdef CONFIG_PAGE_SIZE_4KB
|
|
#define PAGE_SHIFT 12
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_8KB
|
|
#define PAGE_SHIFT 13
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_16KB
|
|
#define PAGE_SHIFT 14
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_64KB
|
|
#define PAGE_SHIFT 16
|
|
#endif
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern void clear_page(void * page);
|
|
extern void copy_page(void * to, void * from);
|
|
|
|
extern unsigned long shm_align_mask;
|
|
|
|
static inline unsigned long pages_do_alias(unsigned long addr1,
|
|
unsigned long addr2)
|
|
{
|
|
return (addr1 ^ addr2) & shm_align_mask;
|
|
}
|
|
|
|
struct page;
|
|
|
|
static inline void clear_user_page(void *addr, unsigned long vaddr,
|
|
struct page *page)
|
|
{
|
|
extern void (*flush_data_cache_page)(unsigned long addr);
|
|
|
|
clear_page(addr);
|
|
if (pages_do_alias((unsigned long) addr, vaddr))
|
|
flush_data_cache_page((unsigned long)addr);
|
|
}
|
|
|
|
static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
|
|
struct page *to)
|
|
{
|
|
extern void (*flush_data_cache_page)(unsigned long addr);
|
|
|
|
copy_page(vto, vfrom);
|
|
if (pages_do_alias((unsigned long)vto, vaddr))
|
|
flush_data_cache_page((unsigned long)vto);
|
|
}
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#ifdef CONFIG_64BIT_PHYS_ADDR
|
|
#ifdef CONFIG_CPU_MIPS32
|
|
typedef struct { unsigned long pte_low, pte_high; } pte_t;
|
|
#define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
|
|
#else
|
|
typedef struct { unsigned long long pte; } pte_t;
|
|
#define pte_val(x) ((x).pte)
|
|
#endif
|
|
#else
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
#define pte_val(x) ((x).pte)
|
|
#endif
|
|
|
|
typedef struct { unsigned long pmd; } pmd_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
|
|
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#define __pmd(x) ((pmd_t) { (x) } )
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
/* Pure 2^n version of get_order */
|
|
static __inline__ int get_order(unsigned long size)
|
|
{
|
|
int order;
|
|
|
|
size = (size-1) >> (PAGE_SHIFT-1);
|
|
order = -1;
|
|
do {
|
|
size >>= 1;
|
|
order++;
|
|
} while (size);
|
|
return order;
|
|
}
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
|
|
|
|
#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
|
|
#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#ifndef CONFIG_NEED_MULTIPLE_NODES
|
|
#define pfn_to_page(pfn) (mem_map + (pfn))
|
|
#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
|
|
#define pfn_valid(pfn) ((pfn) < max_mapnr)
|
|
#endif
|
|
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
|
|
#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
|
|
|
|
#endif /* defined (__KERNEL__) */
|
|
|
|
#ifdef CONFIG_LIMITED_DMA
|
|
#define WANT_PAGE_VIRTUAL
|
|
#endif
|
|
|
|
#endif /* _ASM_PAGE_H */
|