arch/sh/mm/tlb-sh4.c

   1 /*
   2  * arch/sh/mm/tlb-sh4.c
   3  *
   4  * SH-4 specific TLB operations
   5  *
   6  * Copyright (C) 1999  Niibe Yutaka
   7  * Copyright (C) 2002  Paul Mundt
   8  *
   9  * Released under the terms of the GNU GPL v2.0.
  10  */
  11 #include <linux/io.h>
  12 #include <asm/system.h>
  13 #include <asm/mmu_context.h>
  14
  15 void local_flush_tlb_one(unsigned long asid, unsigned long page)
  16 {
  17         unsigned long addr, data;
  18
  19         /*
  20          * NOTE: PTEH.ASID should be set to this MM
  21          *       _AND_ we need to write ASID to the array.
  22          *
  23          * It would be simple if we didn't need to set PTEH.ASID...
  24          */
  25         addr = MMU_UTLB_ADDRESS_ARRAY | MMU_PAGE_ASSOC_BIT;
  26         data = page | asid; /* VALID bit is off */
  27         jump_to_P2();
  28         ctrl_outl(data, addr);
  29         back_to_P1();
  30 }