include/asm-arm/arch-ep93xx/entry-macro.S

   1 /*
   2  * linux/include/asm-arm/arch-ep93xx/entry-macro.S
   3  * IRQ demultiplexing for EP93xx
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or (at
  10  * your option) any later version.
  11  */
  12 #include <asm/arch/ep93xx-regs.h>
  13
  14                 .macro  disable_fiq
  15                 .endm
  16
  17                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  18                 ldr     \base, =(EP93XX_AHB_VIRT_BASE)
  19                 orr     \base, \base, #0x000b0000
  20                 mov     \irqnr, #0
  21                 ldr     \irqstat, [\base]               @ lower 32 interrupts
  22                 cmp     \irqstat, #0
  23                 bne     1001f
  24
  25                 eor     \base, \base, #0x00070000
  26                 ldr     \irqstat, [\base]               @ upper 32 interrupts
  27                 cmp     \irqstat, #0
  28                 beq     1002f
  29                 mov     \irqnr, #0x20
  30
  31 1001:
  32                 movs    \tmp, \irqstat, lsl #16
  33                 movne   \irqstat, \tmp
  34                 addeq   \irqnr, \irqnr, #16
  35
  36                 movs    \tmp, \irqstat, lsl #8
  37                 movne   \irqstat, \tmp
  38                 addeq   \irqnr, \irqnr, #8
  39
  40                 movs    \tmp, \irqstat, lsl #4
  41                 movne   \irqstat, \tmp
  42                 addeq   \irqnr, \irqnr, #4
  43
  44                 movs    \tmp, \irqstat, lsl #2
  45                 movne   \irqstat, \tmp
  46                 addeq   \irqnr, \irqnr, #2
  47
  48                 movs    \tmp, \irqstat, lsl #1
  49                 addeq   \irqnr, \irqnr, #1
  50                 orrs    \base, \base, #1
  51
  52 1002:
  53                 .endm