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Text File  |  2008-12-24  |  898 b   |  33 lines
  1. /*
  2.  * arch/arm/mach-imx/include/mach/entry-macro.S
  3.  *
  4.  * Low-level IRQ helper macros for iMX-based platforms
  5.  *
  6.  * This file is licensed under  the terms of the GNU General Public
  7.  * License version 2. This program is licensed "as is" without any
  8.  * warranty of any kind, whether express or implied.
  9.  */
  10. #include <mach/hardware.h>
  11.  
  12.         .macro    disable_fiq
  13.         .endm
  14.  
  15.         .macro    get_irqnr_preamble, base, tmp
  16.         .endm
  17.  
  18.         .macro    arch_ret_to_user, tmp1, tmp2
  19.         .endm
  20.  
  21. #define AITC_NIVECSR   0x40
  22.         .macro    get_irqnr_and_base, irqnr, irqstat, base, tmp
  23.         ldr    \base, =IO_ADDRESS(IMX_AITC_BASE)
  24.         @ Load offset & priority of the highest priority
  25.         @ interrupt pending.
  26.         ldr    \irqstat, [\base, #AITC_NIVECSR]
  27.         @ Shift off the priority leaving the offset or
  28.         @ "interrupt number", use arithmetic shift to
  29.         @ transform illegal source (0xffff) as -1
  30.         mov    \irqnr, \irqstat, asr #16
  31.         adds    \tmp, \irqnr, #1
  32.         .endm
  33.