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

   1 /*
   2  * include/asm-arm/arch-versatile/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for Versatile platforms
   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                 ldr     \base, =IO_ADDRESS(VERSATILE_VIC_BASE)
  15                 ldr     \irqstat, [\base, #VIC_IRQ_STATUS]      @ get masked status
  16                 mov     \irqnr, #0
  17                 teq     \irqstat, #0
  18                 beq     1003f
  19
  20 1001:           tst     \irqstat, #15
  21                 bne     1002f
  22                 add     \irqnr, \irqnr, #4
  23                 movs    \irqstat, \irqstat, lsr #4
  24                 bne     1001b
  25 1002:           tst     \irqstat, #1
  26                 bne     1003f
  27                 add     \irqnr, \irqnr, #1
  28                 movs    \irqstat, \irqstat, lsr #1
  29                 bne     1002b
  30 1003:           /* EQ will be set if no irqs pending */
  31
  32 @               clz     \irqnr, \irqstat
  33 @1003:          /* EQ will be set if we reach MAXIRQNUM */
  34                 .endm
  35