af39c16bd8
Now that copy_to_user_page()/copy_from_user_page() are wired up, we can drop the old __copy_xxx() implementations. Now that the page colouring scheme has changed via kmap_coherent(), we can avoid the flush in these specific helpers. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
165 lines
4.6 KiB
C
165 lines
4.6 KiB
C
#ifndef __ASM_SH_PAGE_H
|
|
#define __ASM_SH_PAGE_H
|
|
|
|
/*
|
|
* Copyright (C) 1999 Niibe Yutaka
|
|
*/
|
|
|
|
/*
|
|
[ P0/U0 (virtual) ] 0x00000000 <------ User space
|
|
[ P1 (fixed) cached ] 0x80000000 <------ Kernel space
|
|
[ P2 (fixed) non-cachable] 0xA0000000 <------ Physical access
|
|
[ P3 (virtual) cached] 0xC0000000 <------ vmalloced area
|
|
[ P4 control ] 0xE0000000
|
|
*/
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/* PAGE_SHIFT determines the page size */
|
|
#if defined(CONFIG_PAGE_SIZE_4KB)
|
|
# define PAGE_SHIFT 12
|
|
#elif defined(CONFIG_PAGE_SIZE_8KB)
|
|
# define PAGE_SHIFT 13
|
|
#elif defined(CONFIG_PAGE_SIZE_64KB)
|
|
# define PAGE_SHIFT 16
|
|
#else
|
|
# error "Bogus kernel page size?"
|
|
#endif
|
|
|
|
#ifdef __ASSEMBLY__
|
|
#define PAGE_SIZE (1 << PAGE_SHIFT)
|
|
#else
|
|
#define PAGE_SIZE (1UL << PAGE_SHIFT)
|
|
#endif
|
|
|
|
#define PAGE_MASK (~(PAGE_SIZE-1))
|
|
#define PTE_MASK PAGE_MASK
|
|
|
|
#if defined(CONFIG_HUGETLB_PAGE_SIZE_64K)
|
|
#define HPAGE_SHIFT 16
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_256K)
|
|
#define HPAGE_SHIFT 18
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_1MB)
|
|
#define HPAGE_SHIFT 20
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_4MB)
|
|
#define HPAGE_SHIFT 22
|
|
#elif defined(CONFIG_HUGETLB_PAGE_SIZE_64MB)
|
|
#define HPAGE_SHIFT 26
|
|
#endif
|
|
|
|
#ifdef CONFIG_HUGETLB_PAGE
|
|
#define HPAGE_SIZE (1UL << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE-1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT-PAGE_SHIFT)
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
extern void (*clear_page)(void *to);
|
|
extern void (*copy_page)(void *to, void *from);
|
|
|
|
extern unsigned long shm_align_mask;
|
|
extern unsigned long max_low_pfn, min_low_pfn;
|
|
extern unsigned long memory_start, memory_end;
|
|
|
|
#ifdef CONFIG_MMU
|
|
extern void clear_page_slow(void *to);
|
|
extern void copy_page_slow(void *to, void *from);
|
|
#else
|
|
extern void clear_page_nommu(void *to);
|
|
extern void copy_page_nommu(void *to, void *from);
|
|
#endif
|
|
|
|
#if !defined(CONFIG_CACHE_OFF) && defined(CONFIG_MMU) && \
|
|
(defined(CONFIG_CPU_SH4) || defined(CONFIG_SH7705_CACHE_32KB))
|
|
struct page;
|
|
struct vm_area_struct;
|
|
extern void clear_user_page(void *to, unsigned long address, struct page *page);
|
|
#ifdef CONFIG_CPU_SH4
|
|
extern void copy_user_highpage(struct page *to, struct page *from,
|
|
unsigned long vaddr, struct vm_area_struct *vma);
|
|
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
|
|
#endif
|
|
#else
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
#endif
|
|
|
|
/*
|
|
* These are used to make use of C type-checking..
|
|
*/
|
|
#ifdef CONFIG_X2TLB
|
|
typedef struct { unsigned long pte_low, pte_high; } pte_t;
|
|
typedef struct { unsigned long long pgprot; } pgprot_t;
|
|
typedef struct { unsigned long long pgd; } pgd_t;
|
|
#define pte_val(x) \
|
|
((x).pte_low | ((unsigned long long)(x).pte_high << 32))
|
|
#define __pte(x) \
|
|
({ pte_t __pte = {(x), ((unsigned long long)(x)) >> 32}; __pte; })
|
|
#else
|
|
typedef struct { unsigned long pte_low; } pte_t;
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define pte_val(x) ((x).pte_low)
|
|
#define __pte(x) ((pte_t) { (x) } )
|
|
#endif
|
|
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
|
|
#define __pgd(x) ((pgd_t) { (x) } )
|
|
#define __pgprot(x) ((pgprot_t) { (x) } )
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
/* to align the pointer to the (next) page boundary */
|
|
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
|
|
|
|
/*
|
|
* IF YOU CHANGE THIS, PLEASE ALSO CHANGE
|
|
*
|
|
* arch/sh/kernel/vmlinux.lds.S
|
|
*
|
|
* which has the same constant encoded..
|
|
*/
|
|
|
|
#define __MEMORY_START CONFIG_MEMORY_START
|
|
#define __MEMORY_SIZE CONFIG_MEMORY_SIZE
|
|
|
|
#define PAGE_OFFSET CONFIG_PAGE_OFFSET
|
|
#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)
|
|
|
|
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
|
|
|
|
/* PFN start number, because of __MEMORY_START */
|
|
#define PFN_START (__MEMORY_START >> PAGE_SHIFT)
|
|
#define ARCH_PFN_OFFSET (PFN_START)
|
|
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
|
|
#ifdef CONFIG_FLATMEM
|
|
#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn)
|
|
#endif
|
|
#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)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/page.h>
|
|
|
|
/* vDSO support */
|
|
#ifdef CONFIG_VSYSCALL
|
|
#define __HAVE_ARCH_GATE_AREA
|
|
#endif
|
|
|
|
/*
|
|
* Slub defaults to 8-byte alignment, we're only interested in 4.
|
|
* Slab defaults to BYTES_PER_WORD, which ends up being the same anyways.
|
|
*/
|
|
#define ARCH_KMALLOC_MINALIGN 4
|
|
#define ARCH_SLAB_MINALIGN 4
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_SH_PAGE_H */
|