[PATCH] merge some from Rusty's trivial patches
[linux-2.6] / include / asm-m32r / tlbflush.h
1 #ifndef _ASM_M32R_TLBFLUSH_H
2 #define _ASM_M32R_TLBFLUSH_H
3
4 #include <linux/config.h>
5 #include <asm/m32r.h>
6
7 /*
8  * TLB flushing:
9  *
10  *  - flush_tlb() flushes the current mm struct TLBs
11  *  - flush_tlb_all() flushes all processes TLBs
12  *  - flush_tlb_mm(mm) flushes the specified mm context TLB's
13  *  - flush_tlb_page(vma, vmaddr) flushes one page
14  *  - flush_tlb_range(vma, start, end) flushes a range of pages
15  *  - flush_tlb_kernel_range(start, end) flushes a range of kernel pages
16  *  - flush_tlb_pgtables(mm, start, end) flushes a range of page tables
17  */
18
19 extern void local_flush_tlb_all(void);
20 extern void local_flush_tlb_mm(struct mm_struct *);
21 extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long);
22 extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long,
23         unsigned long);
24
25 #ifndef CONFIG_SMP
26 #ifdef CONFIG_MMU
27 #define flush_tlb_all()                 local_flush_tlb_all()
28 #define flush_tlb_mm(mm)                local_flush_tlb_mm(mm)
29 #define flush_tlb_page(vma, page)       local_flush_tlb_page(vma, page)
30 #define flush_tlb_range(vma, start, end)        \
31         local_flush_tlb_range(vma, start, end)
32 #define flush_tlb_kernel_range(start, end)      local_flush_tlb_all()
33 #else   /* CONFIG_MMU */
34 #define flush_tlb_all()                 do { } while (0)
35 #define flush_tlb_mm(mm)                do { } while (0)
36 #define flush_tlb_page(vma, vmaddr)     do { } while (0)
37 #define flush_tlb_range(vma, start, end)        do { } while (0)
38 #endif  /* CONFIG_MMU */
39 #else   /* CONFIG_SMP */
40 extern void smp_flush_tlb_all(void);
41 extern void smp_flush_tlb_mm(struct mm_struct *);
42 extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long);
43 extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long,
44         unsigned long);
45
46 #define flush_tlb_all()                 smp_flush_tlb_all()
47 #define flush_tlb_mm(mm)                smp_flush_tlb_mm(mm)
48 #define flush_tlb_page(vma, page)       smp_flush_tlb_page(vma, page)
49 #define flush_tlb_range(vma, start, end)        \
50         smp_flush_tlb_range(vma, start, end)
51 #define flush_tlb_kernel_range(start, end)      smp_flush_tlb_all()
52 #endif  /* CONFIG_SMP */
53
54 static __inline__ void __flush_tlb_page(unsigned long page)
55 {
56         unsigned int tmpreg0, tmpreg1, tmpreg2;
57
58         __asm__ __volatile__ (
59                 "seth   %0, #high(%4)   \n\t"
60                 "st     %3, @(%5, %0)   \n\t"
61                 "ldi    %1, #1          \n\t"
62                 "st     %1, @(%6, %0)   \n\t"
63                 "add3   %1, %0, %7      \n\t"
64                 ".fillinsn              \n"
65                 "1:                     \n\t"
66                 "ld     %2, @(%6, %0)   \n\t"
67                 "bnez   %2, 1b          \n\t"
68                 "ld     %0, @%1+        \n\t"
69                 "ld     %1, @%1         \n\t"
70                 "st     %2, @+%0        \n\t"
71                 "st     %2, @+%1        \n\t"
72                 : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2)
73                 : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset),
74                 "i" (MTOP_offset), "i" (MIDXI_offset)
75                 : "memory"
76         );
77 }
78
79 static __inline__ void __flush_tlb_all(void)
80 {
81         unsigned int tmpreg0, tmpreg1;
82
83         __asm__ __volatile__ (
84                 "seth   %0, #high(%2)           \n\t"
85                 "or3    %0, %0, #low(%2)        \n\t"
86                 "ldi    %1, #0xc                \n\t"
87                 "st     %1, @%0                 \n\t"
88                 ".fillinsn                      \n"
89                 "1:                             \n\t"
90                 "ld     %1, @%0                 \n\t"
91                 "bnez   %1, 1b                  \n\t"
92                 : "=&r" (tmpreg0), "=&r" (tmpreg1)
93                 : "i" (MTOP) : "memory"
94         );
95 }
96
97 #define flush_tlb_pgtables(mm, start, end)      do { } while (0)
98
99 extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t);
100
101 #endif  /* _ASM_M32R_TLBFLUSH_H */
102