1#ifndef __ASM_METAG_TLBFLUSH_H
2#define __ASM_METAG_TLBFLUSH_H
3
4#include <linux/io.h>
5#include <linux/sched.h>
6#include <asm/metag_mem.h>
7#include <asm/pgalloc.h>
8
9/*
10 * TLB flushing:
11 *
12 *  - flush_tlb() flushes the current mm struct TLBs
13 *  - flush_tlb_all() flushes all processes TLBs
14 *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
15 *  - flush_tlb_page(vma, vmaddr) flushes one page
16 *  - flush_tlb_range(mm, start, end) flushes a range of pages
17 *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
18 *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
19 *
20 * FIXME: Meta 2 can flush single TLB entries.
21 *
22 */
23
24#if defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP)
25static inline void __flush_tlb(void)
26{
27	/* flush TLB entries for just the current hardware thread */
28	int thread = hard_processor_id();
29	metag_out32(0, (LINSYSCFLUSH_TxMMCU_BASE +
30			LINSYSCFLUSH_TxMMCU_STRIDE * thread));
31}
32#else
33static inline void __flush_tlb(void)
34{
35	/* flush TLB entries for all hardware threads */
36	metag_out32(0, LINSYSCFLUSH_MMCU);
37}
38#endif /* defined(CONFIG_METAG_META21) && !defined(CONFIG_SMP) */
39
40#define flush_tlb() __flush_tlb()
41
42#define flush_tlb_all() __flush_tlb()
43
44#define local_flush_tlb_all() __flush_tlb()
45
46static inline void flush_tlb_mm(struct mm_struct *mm)
47{
48	if (mm == current->active_mm)
49		__flush_tlb();
50}
51
52static inline void flush_tlb_page(struct vm_area_struct *vma,
53				  unsigned long addr)
54{
55	flush_tlb_mm(vma->vm_mm);
56}
57
58static inline void flush_tlb_range(struct vm_area_struct *vma,
59				   unsigned long start, unsigned long end)
60{
61	flush_tlb_mm(vma->vm_mm);
62}
63
64static inline void flush_tlb_pgtables(struct mm_struct *mm,
65				      unsigned long start, unsigned long end)
66{
67	flush_tlb_mm(mm);
68}
69
70static inline void flush_tlb_kernel_range(unsigned long start,
71					  unsigned long end)
72{
73	flush_tlb_all();
74}
75
76#endif /* __ASM_METAG_TLBFLUSH_H */
77
78