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#ifndef ASM_X86__PAGE_32_H
#define ASM_X86__PAGE_32_H
/*
* This handles the memory map.
*
* A __PAGE_OFFSET of 0xC0000000 means that the kernel has
* a virtual address space of one gigabyte, which limits the
* amount of physical memory you can use to about 950MB.
*
* If you want more physical memory than this then see the CONFIG_HIGHMEM4G
* and CONFIG_HIGHMEM64G options in the kernel configuration.
*/
#define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL)
#ifdef CONFIG_4KSTACKS
#define THREAD_ORDER 0
#else
#define THREAD_ORDER 1
#endif
#define THREAD_SIZE (PAGE_SIZE << THREAD_ORDER)
#define STACKFAULT_STACK 0
#define DOUBLEFAULT_STACK 1
#define NMI_STACK 0
#define DEBUG_STACK 0
#define MCE_STACK 0
#define N_EXCEPTION_STACKS 1
#ifdef CONFIG_X86_PAE
/* 44=32+12, the limit we can fit into an unsigned long pfn */
#define __PHYSICAL_MASK_SHIFT 44
#define __VIRTUAL_MASK_SHIFT 32
#define PAGETABLE_LEVELS 3
#ifndef __ASSEMBLY__
typedef u64 pteval_t;
typedef u64 pmdval_t;
typedef u64 pudval_t;
typedef u64 pgdval_t;
typedef u64 pgprotval_t;
typedef union {
struct {
unsigned long pte_low, pte_high;
};
pteval_t pte;
} pte_t;
#endif /* __ASSEMBLY__
*/
#else /* !CONFIG_X86_PAE */
#define __PHYSICAL_MASK_SHIFT 32
#define __VIRTUAL_MASK_SHIFT 32
#define PAGETABLE_LEVELS 2
#ifndef __ASSEMBLY__
typedef unsigned long pteval_t;
typedef unsigned long pmdval_t;
typedef unsigned long pudval_t;
typedef unsigned long pgdval_t;
typedef unsigned long pgprotval_t;
typedef union {
pteval_t pte;
pteval_t pte_low;
} pte_t;
#endif /* __ASSEMBLY__ */
#endif /* CONFIG_X86_PAE */
#ifndef __ASSEMBLY__
typedef struct page *pgtable_t;
#endif
#ifdef CONFIG_HUGETLB_PAGE
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif
#ifndef __ASSEMBLY__
#define __phys_addr_nodebug(x) ((x) - PAGE_OFFSET)
#ifdef CONFIG_DEBUG_VIRTUAL
extern unsigned long __phys_addr(unsigned long);
#else
#define __phys_addr(x) __phys_addr_nodebug(x)
#endif
#define __phys_reloc_hide(x) RELOC_HIDE((x), 0)
#ifdef CONFIG_FLATMEM
#define pfn_valid(pfn) ((pfn) < max_mapnr)
#endif /* CONFIG_FLATMEM */
extern int nx_enabled;
/*
* This much address space is reserved for vmalloc() and iomap()
* as well as fixmap mappings.
*/
extern unsigned int __VMALLOC_RESERVE;
extern int sysctl_legacy_va_layout;
extern void find_low_pfn_range(void);
extern unsigned long init_memory_mapping(unsigned long start,
unsigned long end);
extern void initmem_init(unsigned long, unsigned long);
extern void free_initmem(void);
extern void setup_bootmem_allocator(void);
#ifdef CONFIG_X86_USE_3DNOW
#include <asm/mmx.h>
static inline void clear_page(void *page)
{
mmx_clear_page(page);
}
static inline void copy_page(void *to, void *from)
{
mmx_copy_page(to, from);
}
#else /* !CONFIG_X86_USE_3DNOW */
#include <linux/string.h>
static inline void clear_page(void *page)
{
memset(page, 0, PAGE_SIZE);
}
static inline void copy_page(void *to, void *from)
{
memcpy(to, from, PAGE_SIZE);
}
#endif /* CONFIG_X86_3DNOW */
#endif /* !__ASSEMBLY__ */
#endif /* ASM_X86__PAGE_32_H */
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