include/asm-arm/arch-iop13xx/entry-macro.S

   1 /*
   2  * iop13xx low level irq macros
   3  * Copyright (c) 2005-2006, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along with
  15  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  16  * Place - Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  */
  19         .macro  disable_fiq
  20         .endm
  21
  22         .macro get_irqnr_preamble, base, tmp
  23         mrc     p15, 0, \tmp, c15, c1, 0
  24         orr     \tmp, \tmp, #(1 << 6)
  25         mcr     p15, 0, \tmp, c15, c1, 0        @ Enable cp6 access
  26         .endm
  27
  28         /*
  29          * Note: a 1-cycle window exists where iintvec will return the value
  30          * of iintbase, so we explicitly check for "bad zeros"
  31          */
  32         .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  33         mrc     p6, 0, \irqnr, c3, c2, 0        @ Read IINTVEC
  34         cmp     \irqnr, #0
  35         mrceq   p6, 0, \irqnr, c3, c2, 0        @ Re-read on potentially bad zero
  36         adds    \irqstat, \irqnr, #1            @ Check for 0xffffffff
  37         movne   \irqnr, \irqnr, lsr #2          @ Convert to irqnr
  38         .endm
  39
  40         .macro arch_ret_to_user, tmp1, tmp2
  41         mrc     p15, 0, \tmp1, c15, c1, 0
  42         ands    \tmp2, \tmp1, #(1 << 6)
  43         bicne   \tmp1, \tmp1, #(1 << 6)
  44         mcrne   p15, 0, \tmp1, c15, c1, 0       @ Disable cp6 access
  45         .endm