154 lines
3.4 KiB
C
154 lines
3.4 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0 */
|
||
|
|
#ifndef _ALPHA_TLBFLUSH_H
|
||
|
|
#define _ALPHA_TLBFLUSH_H
|
||
|
|
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/sched.h>
|
||
|
|
#include <asm/compiler.h>
|
||
|
|
#include <asm/pgalloc.h>
|
||
|
|
|
||
|
|
#ifndef __EXTERN_INLINE
|
||
|
|
#define __EXTERN_INLINE extern inline
|
||
|
|
#define __MMU_EXTERN_INLINE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
extern void __load_new_mm_context(struct mm_struct *);
|
||
|
|
|
||
|
|
|
||
|
|
/* Use a few helper functions to hide the ugly broken ASN
|
||
|
|
numbers on early Alphas (ev4 and ev45). */
|
||
|
|
|
||
|
|
__EXTERN_INLINE void
|
||
|
|
ev4_flush_tlb_current(struct mm_struct *mm)
|
||
|
|
{
|
||
|
|
__load_new_mm_context(mm);
|
||
|
|
tbiap();
|
||
|
|
}
|
||
|
|
|
||
|
|
__EXTERN_INLINE void
|
||
|
|
ev5_flush_tlb_current(struct mm_struct *mm)
|
||
|
|
{
|
||
|
|
__load_new_mm_context(mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Flush just one page in the current TLB set. We need to be very
|
||
|
|
careful about the icache here, there is no way to invalidate a
|
||
|
|
specific icache page. */
|
||
|
|
|
||
|
|
__EXTERN_INLINE void
|
||
|
|
ev4_flush_tlb_current_page(struct mm_struct * mm,
|
||
|
|
struct vm_area_struct *vma,
|
||
|
|
unsigned long addr)
|
||
|
|
{
|
||
|
|
int tbi_flag = 2;
|
||
|
|
if (vma->vm_flags & VM_EXEC) {
|
||
|
|
__load_new_mm_context(mm);
|
||
|
|
tbi_flag = 3;
|
||
|
|
}
|
||
|
|
tbi(tbi_flag, addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
__EXTERN_INLINE void
|
||
|
|
ev5_flush_tlb_current_page(struct mm_struct * mm,
|
||
|
|
struct vm_area_struct *vma,
|
||
|
|
unsigned long addr)
|
||
|
|
{
|
||
|
|
if (vma->vm_flags & VM_EXEC)
|
||
|
|
__load_new_mm_context(mm);
|
||
|
|
else
|
||
|
|
tbi(2, addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef CONFIG_ALPHA_GENERIC
|
||
|
|
# define flush_tlb_current alpha_mv.mv_flush_tlb_current
|
||
|
|
# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page
|
||
|
|
#else
|
||
|
|
# ifdef CONFIG_ALPHA_EV4
|
||
|
|
# define flush_tlb_current ev4_flush_tlb_current
|
||
|
|
# define flush_tlb_current_page ev4_flush_tlb_current_page
|
||
|
|
# else
|
||
|
|
# define flush_tlb_current ev5_flush_tlb_current
|
||
|
|
# define flush_tlb_current_page ev5_flush_tlb_current_page
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef __MMU_EXTERN_INLINE
|
||
|
|
#undef __EXTERN_INLINE
|
||
|
|
#undef __MMU_EXTERN_INLINE
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Flush current user mapping. */
|
||
|
|
static inline void
|
||
|
|
flush_tlb(void)
|
||
|
|
{
|
||
|
|
flush_tlb_current(current->active_mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Flush someone else's user mapping. */
|
||
|
|
static inline void
|
||
|
|
flush_tlb_other(struct mm_struct *mm)
|
||
|
|
{
|
||
|
|
unsigned long *mmc = &mm->context[smp_processor_id()];
|
||
|
|
/* Check it's not zero first to avoid cacheline ping pong
|
||
|
|
when possible. */
|
||
|
|
if (*mmc) *mmc = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifndef CONFIG_SMP
|
||
|
|
/* Flush everything (kernel mapping may also have changed
|
||
|
|
due to vmalloc/vfree). */
|
||
|
|
static inline void flush_tlb_all(void)
|
||
|
|
{
|
||
|
|
tbia();
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Flush a specified user mapping. */
|
||
|
|
static inline void
|
||
|
|
flush_tlb_mm(struct mm_struct *mm)
|
||
|
|
{
|
||
|
|
if (mm == current->active_mm)
|
||
|
|
flush_tlb_current(mm);
|
||
|
|
else
|
||
|
|
flush_tlb_other(mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Page-granular tlb flush. */
|
||
|
|
static inline void
|
||
|
|
flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
|
||
|
|
{
|
||
|
|
struct mm_struct *mm = vma->vm_mm;
|
||
|
|
|
||
|
|
if (mm == current->active_mm)
|
||
|
|
flush_tlb_current_page(mm, vma, addr);
|
||
|
|
else
|
||
|
|
flush_tlb_other(mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Flush a specified range of user mapping. On the Alpha we flush
|
||
|
|
the whole user tlb. */
|
||
|
|
static inline void
|
||
|
|
flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
|
||
|
|
unsigned long end)
|
||
|
|
{
|
||
|
|
flush_tlb_mm(vma->vm_mm);
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* CONFIG_SMP */
|
||
|
|
|
||
|
|
extern void flush_tlb_all(void);
|
||
|
|
extern void flush_tlb_mm(struct mm_struct *);
|
||
|
|
extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
|
||
|
|
extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
|
||
|
|
unsigned long);
|
||
|
|
|
||
|
|
#endif /* CONFIG_SMP */
|
||
|
|
|
||
|
|
static inline void flush_tlb_kernel_range(unsigned long start,
|
||
|
|
unsigned long end)
|
||
|
|
{
|
||
|
|
flush_tlb_all();
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* _ALPHA_TLBFLUSH_H */
|