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

   1 /*
   2  * arch/arm/mach-integrator/include/mach/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 #include <mach/hardware.h>
  11 #include <mach/platform.h>
  12 #include <mach/irqs.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 /* FIXME: should not be using soo many LDRs here */
  25                 ldr     \base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
  26                 mov     \irqnr, #IRQ_PIC_START
  27                 ldr     \irqstat, [\base, #IRQ_STATUS]          @ get masked status
  28                 ldr     \base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
  29                 teq     \irqstat, #0
  30                 ldreq   \irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
  31                 moveq   \irqnr, #IRQ_CIC_START
  32
  33 1001:           tst     \irqstat, #15
  34                 bne     1002f
  35                 add     \irqnr, \irqnr, #4
  36                 movs    \irqstat, \irqstat, lsr #4
  37                 bne     1001b
  38 1002:           tst     \irqstat, #1
  39                 bne     1003f
  40                 add     \irqnr, \irqnr, #1
  41                 movs    \irqstat, \irqstat, lsr #1
  42                 bne     1002b
  43 1003:           /* EQ will be set if no irqs pending */
  44                 .endm
  45