[mirror_ubuntu-zesty-kernel.git] / include / asm-alpha / tlbflush.h

#ifndef _ALPHA_TLBFLUSH_H
#define _ALPHA_TLBFLUSH_H

#include <linux/config.h>
#include <linux/mm.h>
#include <asm/compiler.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;
}

/* Flush a specified range of user mapping page tables from TLB.
   Although Alpha uses VPTE caches, this can be a nop, as Alpha does
   not have finegrained tlb flushing, so it will flush VPTE stuff
   during next flush_tlb_range.  */

static inline void
flush_tlb_pgtables(struct mm_struct *mm, unsigned long start,
		   unsigned long end)
{
}

#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 */

#define flush_tlb_kernel_range(start, end) flush_tlb_all()

#endif /* _ALPHA_TLBFLUSH_H */
Commit	Line	Data
1da177e4 LT	1	#ifndef _ALPHA_TLBFLUSH_H
	2	#define _ALPHA_TLBFLUSH_H
	3
	4	#include <linux/config.h>
	5	#include <linux/mm.h>
	6	#include <asm/compiler.h>
	7
	8	#ifndef __EXTERN_INLINE
	9	#define __EXTERN_INLINE extern inline
	10	#define __MMU_EXTERN_INLINE
	11	#endif
	12
	13	extern void __load_new_mm_context(struct mm_struct *);
	14
	15
	16	/* Use a few helper functions to hide the ugly broken ASN
	17	numbers on early Alphas (ev4 and ev45). */
	18
	19	__EXTERN_INLINE void
	20	ev4_flush_tlb_current(struct mm_struct *mm)
	21	{
	22	__load_new_mm_context(mm);
	23	tbiap();
	24	}
	25
	26	__EXTERN_INLINE void
	27	ev5_flush_tlb_current(struct mm_struct *mm)
	28	{
	29	__load_new_mm_context(mm);
	30	}
	31
	32	/* Flush just one page in the current TLB set. We need to be very
	33	careful about the icache here, there is no way to invalidate a
	34	specific icache page. */
	35
	36	__EXTERN_INLINE void
	37	ev4_flush_tlb_current_page(struct mm_struct * mm,
	38	struct vm_area_struct *vma,
	39	unsigned long addr)
	40	{
	41	int tbi_flag = 2;
	42	if (vma->vm_flags & VM_EXEC) {
	43	__load_new_mm_context(mm);
	44	tbi_flag = 3;
	45	}
	46	tbi(tbi_flag, addr);
	47	}
	48
	49	__EXTERN_INLINE void
	50	ev5_flush_tlb_current_page(struct mm_struct * mm,
	51	struct vm_area_struct *vma,
	52	unsigned long addr)
	53	{
	54	if (vma->vm_flags & VM_EXEC)
	55	__load_new_mm_context(mm);
	56	else
	57	tbi(2, addr);
	58	}
	59
	60
	61	#ifdef CONFIG_ALPHA_GENERIC
	62	# define flush_tlb_current alpha_mv.mv_flush_tlb_current
	63	# define flush_tlb_current_page alpha_mv.mv_flush_tlb_current_page
	64	#else
65	# ifdef CONFIG_ALPHA_EV4
66	# define flush_tlb_current ev4_flush_tlb_current
67	# define flush_tlb_current_page ev4_flush_tlb_current_page
68	# else
69	# define flush_tlb_current ev5_flush_tlb_current
70	# define flush_tlb_current_page ev5_flush_tlb_current_page
71	# endif
72	#endif
73
74	#ifdef __MMU_EXTERN_INLINE
75	#undef __EXTERN_INLINE
76	#undef __MMU_EXTERN_INLINE
77	#endif
78
79	/* Flush current user mapping. */
80	static inline void
81	flush_tlb(void)
82	{
83	flush_tlb_current(current->active_mm);
84	}
85
86	/* Flush someone else's user mapping. */
87	static inline void
88	flush_tlb_other(struct mm_struct *mm)
89	{
90	unsigned long *mmc = &mm->context[smp_processor_id()];
91	/* Check it's not zero first to avoid cacheline ping pong
92	when possible. */
93	if (mmc) mmc = 0;
94	}
95
96	/* Flush a specified range of user mapping page tables from TLB.
97	Although Alpha uses VPTE caches, this can be a nop, as Alpha does
98	not have finegrained tlb flushing, so it will flush VPTE stuff
99	during next flush_tlb_range. */
100
101	static inline void
102	flush_tlb_pgtables(struct mm_struct *mm, unsigned long start,
103	unsigned long end)
104	{
105	}
106
107	#ifndef CONFIG_SMP
108	/* Flush everything (kernel mapping may also have changed
109	due to vmalloc/vfree). */
110	static inline void flush_tlb_all(void)
111	{
112	tbia();
113	}
114
115	/* Flush a specified user mapping. */
116	static inline void
117	flush_tlb_mm(struct mm_struct *mm)
118	{
119	if (mm == current->active_mm)
120	flush_tlb_current(mm);
121	else
122	flush_tlb_other(mm);
123	}
124
125	/* Page-granular tlb flush. */
126	static inline void
127	flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
128	{
129	struct mm_struct *mm = vma->vm_mm;
130
131	if (mm == current->active_mm)
132	flush_tlb_current_page(mm, vma, addr);
133	else
134	flush_tlb_other(mm);
135	}
136
137	/* Flush a specified range of user mapping. On the Alpha we flush
138	the whole user tlb. */
139	static inline void
140	flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
141	unsigned long end)
142	{
143	flush_tlb_mm(vma->vm_mm);
144	}
145
146	#else /* CONFIG_SMP */
147
148	extern void flush_tlb_all(void);
149	extern void flush_tlb_mm(struct mm_struct *);
150	extern void flush_tlb_page(struct vm_area_struct *, unsigned long);
151	extern void flush_tlb_range(struct vm_area_struct *, unsigned long,
152	unsigned long);
153
154	#endif /* CONFIG_SMP */
155
156	#define flush_tlb_kernel_range(start, end) flush_tlb_all()
157
158	#endif /* _ALPHA_TLBFLUSH_H */