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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 
__flush_tlb_page(unsigned long page)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 
__flush_tlb_all(void)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