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

   1 /*
   2  * include/asm-arm/arch-shark/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  disable_fiq
  11                 .endm
  12
  13                 .macro  get_irqnr_preamble, base, tmp
  14                 .endm
  15
  16                 .macro  arch_ret_to_user, tmp1, tmp2
  17                 .endm
  18
  19                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  20                 mov     r4, #0xe0000000
  21
  22                 mov     \irqstat, #0x0C
  23                 strb    \irqstat, [r4, #0x20]           @outb(0x0C, 0x20) /* Poll command */
  24                 ldrb    \irqnr, [r4, #0x20]             @irq = inb(0x20) & 7
  25                 and     \irqstat, \irqnr, #0x80
  26                 teq     \irqstat, #0
  27                 beq     43f
  28                 and     \irqnr, \irqnr, #7
  29                 teq     \irqnr, #2
  30                 bne     44f
  31 43:             mov     \irqstat, #0x0C
  32                 strb    \irqstat, [r4, #0xa0]           @outb(0x0C, 0xA0) /* Poll command */
  33                 ldrb    \irqnr, [r4, #0xa0]             @irq = (inb(0xA0) & 7) + 8
  34                 and     \irqstat, \irqnr, #0x80
  35                 teq     \irqstat, #0
  36                 beq     44f
  37                 and     \irqnr, \irqnr, #7
  38                 add     \irqnr, \irqnr, #8
  39 44:             teq     \irqstat, #0
  40                 .endm
  41