mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-08-05 16:54:27 +00:00
092e9ebe52
When enable GENERIC_IOREMAP, there will be circular dependency to cause build errors. The root cause is that pgtable.h shouldn't include io.h but pgtable.h need some macros defined in io.h. So cleanup those macros and remove the unnecessary inclusions, as other architectures do. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
|
|
*/
|
|
#ifndef _ASM_PAGE_H
|
|
#define _ASM_PAGE_H
|
|
|
|
#include <linux/const.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
/*
|
|
* PAGE_SHIFT determines the page size
|
|
*/
|
|
#ifdef CONFIG_PAGE_SIZE_4KB
|
|
#define PAGE_SHIFT 12
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_16KB
|
|
#define PAGE_SHIFT 14
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_64KB
|
|
#define PAGE_SHIFT 16
|
|
#endif
|
|
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE - 1))
|
|
|
|
#define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
|
|
#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pfn.h>
|
|
|
|
/*
|
|
* It's normally defined only for FLATMEM config but it's
|
|
* used in our early mem init code for all memory models.
|
|
* So always define it.
|
|
*/
|
|
#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
|
|
|
|
extern void clear_page(void *page);
|
|
extern void copy_page(void *to, void *from);
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
extern unsigned long shm_align_mask;
|
|
|
|
struct page;
|
|
struct vm_area_struct;
|
|
void copy_user_highpage(struct page *to, struct page *from,
|
|
unsigned long vaddr, struct vm_area_struct *vma);
|
|
|
|
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
|
|
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
#define pte_val(x) ((x).pte)
|
|
#define __pte(x) ((pte_t) { (x) })
|
|
typedef struct page *pgtable_t;
|
|
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define __pgd(x) ((pgd_t) { (x) })
|
|
|
|
/*
|
|
* Manipulate page protection bits
|
|
*/
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
#define __pgprot(x) ((pgprot_t) { (x) })
|
|
#define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK)
|
|
|
|
#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
|
|
|
|
/*
|
|
* __pa()/__va() should be used only during mem init.
|
|
*/
|
|
#define __pa(x) PHYSADDR(x)
|
|
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
|
|
#ifdef CONFIG_FLATMEM
|
|
|
|
static inline int pfn_valid(unsigned long pfn)
|
|
{
|
|
/* avoid <linux/mm.h> include hell */
|
|
extern unsigned long max_mapnr;
|
|
unsigned long pfn_offset = ARCH_PFN_OFFSET;
|
|
|
|
return pfn >= pfn_offset && pfn < max_mapnr;
|
|
}
|
|
|
|
#endif
|
|
|
|
#define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr))
|
|
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
|
|
|
|
extern int __virt_addr_valid(volatile void *kaddr);
|
|
#define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr))
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(VM_READ | VM_WRITE | \
|
|
((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_PAGE_H */
|