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Text File  |  2006-08-11  |  939 b   |  36 lines
  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_and_base, irqnr, irqstat, base, tmp
  14.         mov    r4, #0xe0000000
  15.  
  16.         mov    \irqstat, #0x0C
  17.         strb    \irqstat, [r4, #0x20]        @outb(0x0C, 0x20) /* Poll command */
  18.         ldrb    \irqnr, [r4, #0x20]        @irq = inb(0x20) & 7
  19.         and    \irqstat, \irqnr, #0x80
  20.         teq    \irqstat, #0
  21.         beq    43f
  22.         and    \irqnr, \irqnr, #7
  23.         teq    \irqnr, #2
  24.         bne    44f
  25. 43:        mov    \irqstat, #0x0C
  26.         strb    \irqstat, [r4, #0xa0]        @outb(0x0C, 0xA0) /* Poll command */
  27.         ldrb    \irqnr, [r4, #0xa0]        @irq = (inb(0xA0) & 7) + 8
  28.         and    \irqstat, \irqnr, #0x80
  29.         teq    \irqstat, #0
  30.         beq    44f
  31.         and    \irqnr, \irqnr, #7
  32.         add    \irqnr, \irqnr, #8
  33. 44:        teq    \irqstat, #0
  34.         .endm
  35.  
  36.