1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_NOHASH_TLBFLUSH_H 3 #define _ASM_POWERPC_NOHASH_TLBFLUSH_H 4 5 /* 6 * TLB flushing: 7 * 8 * - flush_tlb_mm(mm) flushes the specified mm context TLB's 9 * - flush_tlb_page(vma, vmaddr) flushes one page 10 * - local_flush_tlb_mm(mm, full) flushes the specified mm context on 11 * the local processor 12 * - local_flush_tlb_page(vma, vmaddr) flushes one page on the local processor 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 18 /* 19 * TLB flushing for software loaded TLB chips 20 * 21 * TODO: (CONFIG_FSL_BOOKE) determine if flush_tlb_range & 22 * flush_tlb_kernel_range are best implemented as tlbia vs 23 * specific tlbie's 24 */ 25 26 struct vm_area_struct; 27 struct mm_struct; 28 29 #define MMU_NO_CONTEXT ((unsigned int)-1) 30 31 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 32 unsigned long end); 33 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); 34 35 #ifdef CONFIG_PPC_8xx 36 static inline void local_flush_tlb_mm(struct mm_struct *mm) 37 { 38 unsigned int pid = READ_ONCE(mm->context.id); 39 40 if (pid != MMU_NO_CONTEXT) 41 asm volatile ("sync; tlbia; isync" : : : "memory"); 42 } 43 44 static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr) 45 { 46 asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory"); 47 } 48 #else 49 extern void local_flush_tlb_mm(struct mm_struct *mm); 50 extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 51 52 extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr, 53 int tsize, int ind); 54 #endif 55 56 #ifdef CONFIG_SMP 57 extern void flush_tlb_mm(struct mm_struct *mm); 58 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 59 extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr, 60 int tsize, int ind); 61 #else 62 #define flush_tlb_mm(mm) local_flush_tlb_mm(mm) 63 #define flush_tlb_page(vma,addr) local_flush_tlb_page(vma,addr) 64 #define __flush_tlb_page(mm,addr,p,i) __local_flush_tlb_page(mm,addr,p,i) 65 #endif 66 67 #endif /* _ASM_POWERPC_NOHASH_TLBFLUSH_H */ 68