arch/mips/include/asm/page.h
Source file repositories/reference/linux-study-clean/arch/mips/include/asm/page.h
File Facts
- System
- Linux kernel
- Corpus path
arch/mips/include/asm/page.h- Extension
.h- Size
- 6650 bytes
- Lines
- 228
- Domain
- Architecture Layer
- Bucket
- arch/mips
- Inferred role
- Architecture Layer: implementation source
- Status
- source implementation candidate
Why This File Exists
CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
spaces.hlinux/const.hlinux/kernel.hasm/mipsregs.hvdso/page.hlinux/pfn.hasm/io.hasm-generic/memory_model.hasm-generic/getorder.h
Detected Declarations
struct pagestruct vm_area_structfunction Copyrightfunction pages_do_aliasfunction clear_user_pagefunction __pafunction kaslr_offset
Annotated Snippet
#ifndef _ASM_PAGE_H
#define _ASM_PAGE_H
#include <spaces.h>
#include <linux/const.h>
#include <linux/kernel.h>
#include <asm/mipsregs.h>
#include <vdso/page.h>
/*
* This is used for calculating the real page sizes
* for FTLB or VTLB + FTLB configurations.
*/
static inline unsigned int page_size_ftlb(unsigned int mmuextdef)
{
switch (mmuextdef) {
case MIPS_CONF4_MMUEXTDEF_FTLBSIZEEXT:
if (PAGE_SIZE == (1 << 30))
return 5;
if (PAGE_SIZE == (1llu << 32))
return 6;
if (PAGE_SIZE > (256 << 10))
return 7; /* reserved */
fallthrough;
case MIPS_CONF4_MMUEXTDEF_VTLBSIZEEXT:
return (PAGE_SHIFT - 10) / 2;
default:
panic("Invalid FTLB configuration with Conf4_mmuextdef=%d value\n",
mmuextdef >> 14);
}
}
#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT
#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)
#else /* !CONFIG_MIPS_HUGE_TLB_SUPPORT */
#define HPAGE_SHIFT ({BUILD_BUG(); 0; })
#define HPAGE_SIZE ({BUILD_BUG(); 0; })
#define HPAGE_MASK ({BUILD_BUG(); 0; })
#define HUGETLB_PAGE_ORDER ({BUILD_BUG(); 0; })
#endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
#include <linux/pfn.h>
extern void build_clear_page(void);
extern void build_copy_page(void);
/*
* 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.
*/
#ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
extern unsigned long ARCH_PFN_OFFSET;
# define ARCH_PFN_OFFSET ARCH_PFN_OFFSET
#else
# define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
#endif
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 & PAGE_MASK))
flush_data_cache_page((unsigned long)addr);
}
#define clear_user_page clear_user_page
struct vm_area_struct;
extern void copy_user_highpage(struct page *to, struct page *from,
unsigned long vaddr, struct vm_area_struct *vma);
Annotation
- Immediate include surface: `spaces.h`, `linux/const.h`, `linux/kernel.h`, `asm/mipsregs.h`, `vdso/page.h`, `linux/pfn.h`, `asm/io.h`, `asm-generic/memory_model.h`.
- Detected declarations: `struct page`, `struct vm_area_struct`, `function Copyright`, `function pages_do_alias`, `function clear_user_page`, `function __pa`, `function kaslr_offset`.
- Atlas domain: Architecture Layer / arch/mips.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.