include/asm-arm/arch-ep93xx/entry-macro.S

   1 /*
   2  * linux/include/asm-arm/arch-ep93xx/entry-macro.S
   3  * IRQ demultiplexing for EP93xx
   4  *
   5  * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or (at
  10  * your option) any later version.
  11  */
  12 #include <asm/arch/ep93xx-regs.h>
  13
  14                 .macro  disable_fiq
  15                 .endm
  16
  17                 .macro  get_irqnr_preamble, base, tmp
  18                 .endm
  19
  20                 .macro  arch_ret_to_user, tmp1, tmp2
  21                 .endm
  22
  23                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  24                 ldr     \base, =(EP93XX_AHB_VIRT_BASE)
  25                 orr     \base, \base, #0x000b0000
  26                 mov     \irqnr, #0
  27                 ldr     \irqstat, [\base]               @ lower 32 interrupts
  28                 cmp     \irqstat, #0
  29                 bne     1001f
  30
  31                 eor     \base, \base, #0x00070000
  32                 ldr     \irqstat, [\base]               @ upper 32 interrupts
  33                 cmp     \irqstat, #0
  34                 beq     1002f
  35                 mov     \irqnr, #0x20
  36
  37 1001:
  38                 movs    \tmp, \irqstat, lsl #16
  39                 movne   \irqstat, \tmp
  40                 addeq   \irqnr, \irqnr, #16
  41
  42                 movs    \tmp, \irqstat, lsl #8
  43                 movne   \irqstat, \tmp
  44                 addeq   \irqnr, \irqnr, #8
  45
  46                 movs    \tmp, \irqstat, lsl #4
  47                 movne   \irqstat, \tmp
  48                 addeq   \irqnr, \irqnr, #4
  49
  50                 movs    \tmp, \irqstat, lsl #2
  51                 movne   \irqstat, \tmp
  52                 addeq   \irqnr, \irqnr, #2
  53
  54                 movs    \tmp, \irqstat, lsl #1
  55                 addeq   \irqnr, \irqnr, #1
  56                 orrs    \base, \base, #1
  57
  58 1002:
  59                 .endm