1 #ifndef _ASM_M32R_TLBFLUSH_H
2 #define _ASM_M32R_TLBFLUSH_H
3
4 #include <asm/m32r.h>
5
6 /*
7 * TLB flushing:
8 *
9 * - flush_tlb() flushes the current mm struct TLBs
10 * - flush_tlb_all() flushes all processes TLBs
11 * - flush_tlb_mm(mm) flushes the specified mm context TLB's
12 * - flush_tlb_page(vma, vmaddr) flushes one page
13 * - flush_tlb_range(vma, start, end) flushes a range of pages
14 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
15 */
16
17 extern void local_flush_tlb_all(void);
18 extern void local_flush_tlb_mm(struct mm_struct *);
19 extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
20 extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
21 unsigned long);
22
23 #ifndef CONFIG_SMP
24 #ifdef CONFIG_MMU
25 #define flush_tlb_all() local_flush_tlb_all()
26 #define flush_tlb_mm(mm) local_flush_tlb_mm(mm)
27 #define flush_tlb_page(vma, page) local_flush_tlb_page(vma, page)
28 #define flush_tlb_range(vma, start, end) \
29 local_flush_tlb_range(vma, start, end)
30 #define flush_tlb_kernel_range(start, end) local_flush_tlb_all()
31 #else /* CONFIG_MMU */
32 #define flush_tlb_all() do { } while (0)
33 #define flush_tlb_mm(mm) do { } while (0)
34 #define flush_tlb_page(vma, vmaddr) do { } while (0)
35 #define flush_tlb_range(vma, start, end) do { } while (0)
36 #endif /* CONFIG_MMU */
37 #else /* CONFIG_SMP */
38 extern void smp_flush_tlb_all(void);
39 extern void smp_flush_tlb_mm(struct mm_struct *);
40 extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
41 extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
42 unsigned long);
43
44 #define flush_tlb_all() smp_flush_tlb_all()
45 #define flush_tlb_mm(mm) smp_flush_tlb_mm(mm)
46 #define flush_tlb_page(vma, page) smp_flush_tlb_page(vma, page)
47 #define flush_tlb_range(vma, start, end) \
48 smp_flush_tlb_range(vma, start, end)
49 #define flush_tlb_kernel_range(start, end) smp_flush_tlb_all()
50 #endif /* CONFIG_SMP */
51
52 static __inline__ void __flush_tlb_page(unsigned long page)
53 {
54 unsigned int tmpreg0, tmpreg1, tmpreg2;
55
56 __asm__ __volatile__ (
57 "seth %0, #high(%4) \n\t"
58 "st %3, @(%5, %0) \n\t"
59 "ldi %1, #1 \n\t"
60 "st %1, @(%6, %0) \n\t"
61 "add3 %1, %0, %7 \n\t"
62 ".fillinsn \n"
63 "1: \n\t"
64 "ld %2, @(%6, %0) \n\t"
65 "bnez %2, 1b \n\t"
66 "ld %0, @%1+ \n\t"
67 "ld %1, @%1 \n\t"
68 "st %2, @+%0 \n\t"
69 "st %2, @+%1 \n\t"
70 : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
71 : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
72 "i" (MTOP_offset), "i" (MIDXI_offset)
73 : "memory"
74 );
75 }
76
77 static __inline__ void __flush_tlb_all(void)
78 {
79 unsigned int tmpreg0, tmpreg1;
80
81 __asm__ __volatile__ (
82 "seth %0, #high(%2) \n\t"
83 "or3 %0, %0, #low(%2) \n\t"
84 "ldi %1, #0xc \n\t"
85 "st %1, @%0 \n\t"
86 ".fillinsn \n"
87 "1: \n\t"
88 "ld %1, @%0 \n\t"
89 "bnez %1, 1b \n\t"
90 : "=&r" (tmpreg0), "=&r" (tmpreg1)
91 : "i" (MTOP) : "memory"
92 );
93 }
94
95 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *);
96
97 #endif /* _ASM_M32R_TLBFLUSH_H */
98
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