| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |