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

   1 /*
   2  * include/asm-arm/arch-integrator/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for Integrator 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
  11                 .macro  disable_fiq
  12                 .endm
  13
  14                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  15 /* FIXME: should not be using soo many LDRs here */
  16                 ldr     \base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
  17                 mov     \irqnr, #IRQ_PIC_START
  18                 ldr     \irqstat, [\base, #IRQ_STATUS]          @ get masked status
  19                 ldr     \base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
  20                 teq     \irqstat, #0
  21                 ldreq   \irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
  22                 moveq   \irqnr, #IRQ_CIC_START
  23
  24 1001:           tst     \irqstat, #15
  25                 bne     1002f
  26                 add     \irqnr, \irqnr, #4
  27                 movs    \irqstat, \irqstat, lsr #4
  28                 bne     1001b
  29 1002:           tst     \irqstat, #1
  30                 bne     1003f
  31                 add     \irqnr, \irqnr, #1
  32                 movs    \irqstat, \irqstat, lsr #1
  33                 bne     1002b
  34 1003:           /* EQ will be set if no irqs pending */
  35                 .endm
  36