arch/arm/mach-ks8695/include/mach/entry-macro.S

   1 /*
   2  * arch/arm/mach-ks8695/include/mach/entry-macro.S
   3  *
   4  * Copyright (C) 2006 Ben Dooks <ben@simtec.co.uk>
   5  * Copyright (C) 2006 Simtec Electronics
   6  *
   7  * Low-level IRQ helper macros for KS8695
   8  *
   9  * This file is licensed under  the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12 */
  13
  14 #include <mach/hardware.h>
  15 #include <mach/regs-irq.h>
  16
  17         .macro  get_irqnr_preamble, base, tmp
  18                 ldr     \base, =KS8695_IRQ_VA                   @ Base address of interrupt controller
  19         .endm
  20
  21         .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  22                 ldr     \irqstat, [\base, #KS8695_INTMS]        @ Mask Status register
  23
  24                 teq     \irqstat, #0
  25                 beq     1001f
  26
  27                 mov     \irqnr, #0
  28
  29                 tst     \irqstat, #0xff
  30                 moveq   \irqstat, \irqstat, lsr #8
  31                 addeq   \irqnr, \irqnr, #8
  32                 tsteq   \irqstat, #0xff
  33                 moveq   \irqstat, \irqstat, lsr #8
  34                 addeq   \irqnr, \irqnr, #8
  35                 tsteq   \irqstat, #0xff
  36                 moveq   \irqstat, \irqstat, lsr #8
  37                 addeq   \irqnr, \irqnr, #8
  38                 tst     \irqstat, #0x0f
  39                 moveq   \irqstat, \irqstat, lsr #4
  40                 addeq   \irqnr, \irqnr, #4
  41                 tst     \irqstat, #0x03
  42                 moveq   \irqstat, \irqstat, lsr #2
  43                 addeq   \irqnr, \irqnr, #2
  44                 tst     \irqstat, #0x01
  45                 addeqs  \irqnr, \irqnr, #1
  46 1001:
  47         .endm