release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-pxa/include/mach/entry-macro.S

   1 /*
   2  * arch/arm/mach-pxa/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for PXA-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 #include <mach/hardware.h>
  11 #include <mach/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                 mrc     p15, 0, \tmp, c0, c0, 0         @ CPUID
  24                 mov     \tmp, \tmp, lsr #13
  25                 and     \tmp, \tmp, #0x7                @ Core G
  26                 cmp     \tmp, #1
  27                 bhi     1002f
  28
  29                 @ Core Generation 1 (PXA25x)
  30                 mov     \base, #io_p2v(0x40000000)      @ IIR Ctl = 0x40d00000
  31                 add     \base, \base, #0x00d00000
  32                 ldr     \irqstat, [\base, #0]           @ ICIP
  33                 ldr     \irqnr, [\base, #4]             @ ICMR
  34
  35                 ands    \irqnr, \irqstat, \irqnr
  36                 beq     1001f
  37                 rsb     \irqstat, \irqnr, #0
  38                 and     \irqstat, \irqstat, \irqnr
  39                 clz     \irqnr, \irqstat
  40                 rsb     \irqnr, \irqnr, #(31 + PXA_IRQ(0))
  41                 b       1001f
  42 1002:
  43                 @ Core Generation 2 (PXA27x) or Core Generation 3 (PXA3xx)
  44                 mrc     p6, 0, \irqstat, c5, c0, 0      @ ICHP
  45                 tst     \irqstat, #0x80000000
  46                 beq     1001f
  47                 bic     \irqstat, \irqstat, #0x80000000
  48                 mov     \irqnr, \irqstat, lsr #16
  49                 add     \irqnr, \irqnr, #(PXA_IRQ(0))
  50 1001:
  51                 .endm