arch/arm64/mm/tlb.S

   1 /*
   2  * Based on arch/arm/mm/tlb.S
   3  *
   4  * Copyright (C) 1997-2002 Russell King
   5  * Copyright (C) 2012 ARM Ltd.
   6  * Written by Catalin Marinas <catalin.marinas@arm.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20 #include <linux/linkage.h>
  21 #include <asm/assembler.h>
  22 #include <asm/asm-offsets.h>
  23 #include <asm/page.h>
  24 #include <asm/tlbflush.h>
  25 #include "proc-macros.S"
  26
  27 /*
  28  *      __cpu_flush_user_tlb_range(start, end, vma)
  29  *
  30  *      Invalidate a range of TLB entries in the specified address space.
  31  *
  32  *      - start - start address (may not be aligned)
  33  *      - end   - end address (exclusive, may not be aligned)
  34  *      - vma   - vma_struct describing address range
  35  */
  36 ENTRY(__cpu_flush_user_tlb_range)
  37         vma_vm_mm x3, x2                        // get vma->vm_mm
  38         mmid    x3, x3                          // get vm_mm->context.id
  39         dsb     sy
  40         lsr     x0, x0, #12                     // align address
  41         lsr     x1, x1, #12
  42         bfi     x0, x3, #48, #16                // start VA and ASID
  43         bfi     x1, x3, #48, #16                // end VA and ASID
  44 1:      tlbi    vae1is, x0                      // TLB invalidate by address and ASID
  45         add     x0, x0, #1
  46         cmp     x0, x1
  47         b.lo    1b
  48         dsb     sy
  49         ret
  50 ENDPROC(__cpu_flush_user_tlb_range)
  51
  52 /*
  53  *      __cpu_flush_kern_tlb_range(start,end)
  54  *
  55  *      Invalidate a range of kernel TLB entries.
  56  *
  57  *      - start - start address (may not be aligned)
  58  *      - end   - end address (exclusive, may not be aligned)
  59  */
  60 ENTRY(__cpu_flush_kern_tlb_range)
  61         dsb     sy
  62         lsr     x0, x0, #12                     // align address
  63         lsr     x1, x1, #12
  64 1:      tlbi    vaae1is, x0                     // TLB invalidate by address
  65         add     x0, x0, #1
  66         cmp     x0, x1
  67         b.lo    1b
  68         dsb     sy
  69         isb
  70         ret
  71 ENDPROC(__cpu_flush_kern_tlb_range)