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 #include <asm/hardware.h>
  11 #include <asm/arch/irqs.h>
  12
  13                 .macro  disable_fiq
  14                 .endm
  15
  16                 .macro  get_irqnr_preamble, base, tmp
  17                 .endm
  18
  19                 .macro  arch_ret_to_user, tmp1, tmp2
  20                 .endm
  21
  22                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  23 /* FIXME: should not be using soo many LDRs here */
  24                 ldr     \base, =IO_ADDRESS(INTEGRATOR_IC_BASE)
  25                 mov     \irqnr, #IRQ_PIC_START
  26                 ldr     \irqstat, [\base, #IRQ_STATUS]          @ get masked status
  27                 ldr     \base, =IO_ADDRESS(INTEGRATOR_HDR_BASE)
  28                 teq     \irqstat, #0
  29                 ldreq   \irqstat, [\base, #(INTEGRATOR_HDR_IC_OFFSET+IRQ_STATUS)]
  30                 moveq   \irqnr, #IRQ_CIC_START
  31
  32 1001:           tst     \irqstat, #15
  33                 bne     1002f
  34                 add     \irqnr, \irqnr, #4
  35                 movs    \irqstat, \irqstat, lsr #4
  36                 bne     1001b
  37 1002:           tst     \irqstat, #1
  38                 bne     1003f
  39                 add     \irqnr, \irqnr, #1
  40                 movs    \irqstat, \irqstat, lsr #1
  41                 bne     1002b
  42 1003:           /* EQ will be set if no irqs pending */
  43                 .endm
  44