SAFE public projects git trees. - safe/jmp/linux-2.6/blob - include/asm-arm/arch-aaec2000/entry-macro.S

   1 /*
   2  *  linux/include/asm-arm/arch-aaec2000/entry-macro.S
   3  *
   4  *  Low-level IRQ helper for aaec-2000 based platforms
   5  *
   6  *  Copyright (c) 2005 Nicolas Bellido Y Ortega
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  */
  13
  14                 .macro  disable_fiq
  15                 .endm
  16
  17                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  18                 mov     r4, #0xf8000000
  19                 add     r4, r4, #0x00000500
  20                 mov     \base, r4
  21                 ldr     \irqstat, [\base, #0]
  22                 cmp     \irqstat, #0
  23                 bne     1001f
  24                 ldr     \irqnr, =NR_IRQS+1
  25                 b       1003f
  26 1001:           mov     \irqnr, #0
  27 1002:           ands    \tmp, \irqstat, #1
  28                 mov     \irqstat, \irqstat, LSR #1
  29                 add     \irqnr, \irqnr, #1
  30                 beq     1002b
  31                 sub     \irqnr, \irqnr, #1
  32 1003:
  33                 .endm