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)
__flush_tlb(void)25 static 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
__flush_tlb(void)33 static 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
flush_tlb_mm(struct mm_struct * mm)46 static inline void flush_tlb_mm(struct mm_struct *mm)
47 {
48 if (mm == current->active_mm)
49 __flush_tlb();
50 }
51
flush_tlb_page(struct vm_area_struct * vma,unsigned long addr)52 static inline void flush_tlb_page(struct vm_area_struct *vma,
53 unsigned long addr)
54 {
55 flush_tlb_mm(vma->vm_mm);
56 }
57
flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)58 static 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
flush_tlb_pgtables(struct mm_struct * mm,unsigned long start,unsigned long end)64 static inline void flush_tlb_pgtables(struct mm_struct *mm,
65 unsigned long start, unsigned long end)
66 {
67 flush_tlb_mm(mm);
68 }
69
flush_tlb_kernel_range(unsigned long start,unsigned long end)70 static 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