arch/powerpc/include/asm/book3s/32/tlbflush.h

Source file repositories/reference/linux-study-clean/arch/powerpc/include/asm/book3s/32/tlbflush.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/book3s/32/tlbflush.h
Extension
.h
Size
2339 bytes
Lines
95
Domain
Architecture Layer
Bucket
arch/powerpc
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.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H
#define _ASM_POWERPC_BOOK3S_32_TLBFLUSH_H

#include <linux/build_bug.h>

#define MMU_NO_CONTEXT      (0)
/*
 * TLB flushing for "classic" hash-MMU 32-bit CPUs, 6xx, 7xx, 7xxx
 */
void hash__flush_tlb_mm(struct mm_struct *mm);
void hash__flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
void hash__flush_range(struct mm_struct *mm, unsigned long start, unsigned long end);
void hash__flush_gather(struct mmu_gather *tlb);

#ifdef CONFIG_SMP
void _tlbie(unsigned long address);
#else
static inline void _tlbie(unsigned long address)
{
	asm volatile ("tlbie %0; sync" : : "r" (address) : "memory");
}
#endif
void _tlbia(void);

/*
 * Called at the end of a mmu_gather operation to make sure the
 * TLB flush is completely done.
 */
static inline void tlb_flush(struct mmu_gather *tlb)
{
	/* 603 needs to flush the whole TLB here since it doesn't use a hash table. */
	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
		hash__flush_gather(tlb);
	else
		_tlbia();
}

static inline void flush_range(struct mm_struct *mm, unsigned long start, unsigned long end)
{
	start &= PAGE_MASK;
	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
		hash__flush_range(mm, start, end);
	else if (end - start <= PAGE_SIZE)
		_tlbie(start);
	else
		_tlbia();
}

static inline void flush_tlb_mm(struct mm_struct *mm)
{
	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
		hash__flush_tlb_mm(mm);
	else
		_tlbia();
}

static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr)
{
	if (mmu_has_feature(MMU_FTR_HPTE_TABLE))
		hash__flush_tlb_page(vma, vmaddr);
	else
		_tlbie(vmaddr);
}

static inline void
flush_tlb_range(struct vm_area_struct *vma, unsigned long start, unsigned long end)
{
	flush_range(vma->vm_mm, start, end);
}

static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
	flush_range(&init_mm, start, end);
}

static inline void local_flush_tlb_page(struct vm_area_struct *vma,
					unsigned long vmaddr)
{
	flush_tlb_page(vma, vmaddr);
}

static inline void local_flush_tlb_page_psize(struct mm_struct *mm,
					      unsigned long vmaddr, int psize)
{
	flush_range(mm, vmaddr, vmaddr);
}

static inline void local_flush_tlb_mm(struct mm_struct *mm)
{
	flush_tlb_mm(mm);

Annotation

Implementation Notes