arch/arm/mach-orion5x/include/mach/entry-macro.S

   1 /*
   2  * arch/arm/mach-orion5x/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for Orion 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
  11 #include <mach/bridge-regs.h>
  12
  13         .macro  get_irqnr_preamble, base, tmp
  14         ldr     \base, =MAIN_IRQ_CAUSE
  15         .endm
  16
  17         .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  18         ldr     \irqstat, [\base, #0]           @ main cause
  19         ldr     \tmp, [\base, #(MAIN_IRQ_MASK - MAIN_IRQ_CAUSE)] @ main mask
  20         mov     \irqnr, #0                      @ default irqnr
  21         @ find cause bits that are unmasked
  22         ands    \irqstat, \irqstat, \tmp        @ clear Z flag if any
  23         clzne   \irqnr, \irqstat                @ calc irqnr
  24         rsbne   \irqnr, \irqnr, #31
  25         .endm