include/asm-arm/arch-ixp4xx/entry-macro.S

   1 /*
   2  * include/asm-arm/arch-ixp4xx/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for IXP4xx-based 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                 ldr     \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP_OFFSET)
  16                 ldr     \irqstat, [\irqstat]            @ get interrupts
  17                 cmp     \irqstat, #0
  18                 beq     1001f
  19                 clz     \irqnr, \irqstat
  20                 mov     \base, #31
  21                 subs    \irqnr, \base, \irqnr
  22
  23 1001:
  24                 /*
  25                  * IXP465 has an upper IRQ status register
  26                  */
  27 #if defined(CONFIG_CPU_IXP46X)
  28                 bne     1002f
  29                 ldr     \irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET)
  30                 ldr     \irqstat, [\irqstat]            @ get upper interrupts
  31                 mov     \irqnr, #63
  32                 clz     \irqstat, \irqstat
  33                 cmp     \irqstat, #32
  34                 subne   \irqnr, \irqnr, \irqstat
  35 1002:
  36 #endif
  37                 .endm
  38
  39