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

   1 /*
   2  * arch/arm/mach-shark/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for Shark platform
   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                 .macro  get_irqnr_preamble, base, tmp
  11                 mov     \base, #0xfe000000
  12                 orr     \base, \base, #0x00e00000
  13                 .endm
  14
  15                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  16
  17                 mov     \irqstat, #0x0C
  18                 strb    \irqstat, [\base, #0x20]        @outb(0x0C, 0x20) /* Poll command */
  19                 ldrb    \irqnr, [\base, #0x20]          @irq = inb(0x20) & 7
  20                 and     \irqstat, \irqnr, #0x80
  21                 teq     \irqstat, #0
  22                 beq     43f
  23                 and     \irqnr, \irqnr, #7
  24                 teq     \irqnr, #2
  25                 bne     44f
  26 43:             mov     \irqstat, #0x0C
  27                 strb    \irqstat, [\base, #0xa0]        @outb(0x0C, 0xA0) /* Poll command */
  28                 ldrb    \irqnr, [\base, #0xa0]          @irq = (inb(0xA0) & 7) + 8
  29                 and     \irqstat, \irqnr, #0x80
  30                 teq     \irqstat, #0
  31                 beq     44f
  32                 and     \irqnr, \irqnr, #7
  33                 add     \irqnr, \irqnr, #8
  34 44:             teq     \irqstat, #0
  35                 .endm
  36