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

   1 /*
   2  * include/asm-arm/arch-imx/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 <asm/hardware.h>
  11
  12                 .macro  disable_fiq
  13                 .endm
  14 #define AITC_NIVECSR   0x40
  15                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  16                 ldr     \base, =IO_ADDRESS(IMX_AITC_BASE)
  17                 @ Load offset & priority of the highest priority
  18                 @ interrupt pending.
  19                 ldr     \irqstat, [\base, #AITC_NIVECSR]
  20                 @ Shift off the priority leaving the offset or
  21                 @ "interrupt number", use arithmetic shift to
  22                 @ transform illegal source (0xffff) as -1
  23                 mov     \irqnr, \irqstat, asr #16
  24                 adds    \tmp, \irqnr, #1
  25                 .endm