projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 1da177e4 LT |
2 | #ifndef _ASM_M32R_TLBFLUSH_H |
| 3 | #define _ASM_M32R_TLBFLUSH_H | |
| 4 | ||
| 1da177e4 LT |
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 | |
| 1da177e4 LT |
16 | */ |
| 17 | ||
| 18 | extern void local_flush_tlb_all(void); | |
| 19 | extern void local_flush_tlb_mm(struct mm_struct *); | |
| 20 | extern void local_flush_tlb_page(struct vm_area_struct *, unsigned long); | |
| 21 | extern void local_flush_tlb_range(struct vm_area_struct *, unsigned long, | |
| 22 | unsigned long); | |
| 23 | ||
| 24 | #ifndef CONFIG_SMP | |
| 25 | #ifdef CONFIG_MMU | |
| 26 | #define flush_tlb_all() local_flush_tlb_all() | |
| 27 | #define flush_tlb_mm(mm) local_flush_tlb_mm(mm) | |
| 28 | #define flush_tlb_page(vma, page) local_flush_tlb_page(vma, page) | |
| 29 | #define flush_tlb_range(vma, start, end) \ | |
| 30 | local_flush_tlb_range(vma, start, end) | |
| 31 | #define flush_tlb_kernel_range(start, end) local_flush_tlb_all() | |
| 32 | #else /* CONFIG_MMU */ | |
| 33 | #define flush_tlb_all() do { } while (0) | |
| 34 | #define flush_tlb_mm(mm) do { } while (0) | |
| 35 | #define flush_tlb_page(vma, vmaddr) do { } while (0) | |
| 36 | #define flush_tlb_range(vma, start, end) do { } while (0) | |
| 37 | #endif /* CONFIG_MMU */ | |
| 38 | #else /* CONFIG_SMP */ | |
| 39 | extern void smp_flush_tlb_all(void); | |
| 40 | extern void smp_flush_tlb_mm(struct mm_struct *); | |
| 41 | extern void smp_flush_tlb_page(struct vm_area_struct *, unsigned long); | |
| 42 | extern void smp_flush_tlb_range(struct vm_area_struct *, unsigned long, | |
| 43 | unsigned long); | |
| 44 | ||
| 45 | #define flush_tlb_all() smp_flush_tlb_all() | |
| 46 | #define flush_tlb_mm(mm) smp_flush_tlb_mm(mm) | |
| 47 | #define flush_tlb_page(vma, page) smp_flush_tlb_page(vma, page) | |
| 48 | #define flush_tlb_range(vma, start, end) \ | |
| 49 | smp_flush_tlb_range(vma, start, end) | |
| 50 | #define flush_tlb_kernel_range(start, end) smp_flush_tlb_all() | |
| 51 | #endif /* CONFIG_SMP */ | |
| 52 | ||
| 53 | static __inline__ void __flush_tlb_page(unsigned long page) | |
| 54 | { | |
| 55 | unsigned int tmpreg0, tmpreg1, tmpreg2; | |
| 56 | ||
| 57 | __asm__ __volatile__ ( | |
| 58 | "seth %0, #high(%4) \n\t" | |
| 59 | "st %3, @(%5, %0) \n\t" | |
| 60 | "ldi %1, #1 \n\t" | |
| 61 | "st %1, @(%6, %0) \n\t" | |
| 62 | "add3 %1, %0, %7 \n\t" | |
| 63 | ".fillinsn \n" | |
| 64 | "1: \n\t" | |
| 65 | "ld %2, @(%6, %0) \n\t" | |
| 66 | "bnez %2, 1b \n\t" | |
| 67 | "ld %0, @%1+ \n\t" | |
| 68 | "ld %1, @%1 \n\t" | |
| 69 | "st %2, @+%0 \n\t" | |
| 70 | "st %2, @+%1 \n\t" | |
| 71 | : "=&r" (tmpreg0), "=&r" (tmpreg1), "=&r" (tmpreg2) | |
| 72 | : "r" (page), "i" (MMU_REG_BASE), "i" (MSVA_offset), | |
| 73 | "i" (MTOP_offset), "i" (MIDXI_offset) | |
| 74 | : "memory" | |
| 75 | ); | |
| 76 | } | |
| 77 | ||
| 78 | static __inline__ void __flush_tlb_all(void) | |
| 79 | { | |
| 80 | unsigned int tmpreg0, tmpreg1; | |
| 81 | ||
| 82 | __asm__ __volatile__ ( | |
| 83 | "seth %0, #high(%2) \n\t" | |
| 84 | "or3 %0, %0, #low(%2) \n\t" | |
| 85 | "ldi %1, #0xc \n\t" | |
| 86 | "st %1, @%0 \n\t" | |
| 87 | ".fillinsn \n" | |
| 88 | "1: \n\t" | |
| 89 | "ld %1, @%0 \n\t" | |
| 90 | "bnez %1, 1b \n\t" | |
| 91 | : "=&r" (tmpreg0), "=&r" (tmpreg1) | |
| 92 | : "i" (MTOP) : "memory" | |
| 93 | ); | |
| 94 | } | |
| 95 | ||
| 4b3073e1 | 96 | extern void update_mmu_cache(struct vm_area_struct *, unsigned long, pte_t *); |
| 1da177e4 LT |
97 | |
| 98 | #endif /* _ASM_M32R_TLBFLUSH_H */ |