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

   1 /*
   2  * Low-level IRQ helper macros for TI DaVinci-based platforms
   3  *
   4  * Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc. This file is licensed under
   7  * the terms of the GNU General Public License version 2. This program
   8  * is licensed "as is" without any warranty of any kind, whether express
   9  * or implied.
  10  */
  11 #include <mach/irqs.h>
  12
  13                 .macro  get_irqnr_preamble, base, tmp
  14                 ldr \base, =davinci_intc_base
  15                 ldr \base, [\base]
  16                 .endm
  17
  18                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  19 #if defined(CONFIG_AINTC) && defined(CONFIG_CP_INTC)
  20                 ldr \tmp, =davinci_intc_type
  21                 ldr \tmp, [\tmp]
  22                 cmp \tmp, #DAVINCI_INTC_TYPE_CP_INTC
  23                 beq 1001f
  24 #endif
  25 #if defined(CONFIG_AINTC)
  26                 ldr \tmp, [\base, #0x14]
  27                 movs \tmp, \tmp, lsr #2
  28                 sub \irqnr, \tmp, #1
  29                 b 1002f
  30 #endif
  31 #if defined(CONFIG_CP_INTC)
  32 1001:           ldr \irqnr, [\base, #0x80] /* get irq number */
  33                 and \irqnr, \irqnr, #0xff  /* irq is in bits 0-9 */
  34                 mov \tmp, \irqnr, lsr #3
  35                 and \tmp, \tmp, #0xfc
  36                 add \tmp, \tmp, #0x280 /* get the register offset */
  37                 ldr \irqstat, [\base, \tmp] /* get the intc status */
  38                 cmp \irqstat, #0x0
  39 #endif
  40 1002:
  41                 .endm