root/arch/arm/mach-iop32x/include/mach/entry-macro.S

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   1 /*
   2  * arch/arm/mach-iop32x/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for IOP32x-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         .macro get_irqnr_preamble, base, tmp
  11         mrc     p15, 0, \tmp, c15, c1, 0
  12         orr     \tmp, \tmp, #(1 << 6)
  13         mcr     p15, 0, \tmp, c15, c1, 0        @ Enable cp6 access
  14         mrc     p15, 0, \tmp, c15, c1, 0
  15         mov     \tmp, \tmp
  16         sub     pc, pc, #4                      @ cp_wait
  17         .endm
  18 
  19         .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  20         mrc     p6, 0, \irqstat, c8, c0, 0      @ Read IINTSRC
  21         cmp     \irqstat, #0
  22         clzne   \irqnr, \irqstat
  23         rsbne   \irqnr, \irqnr, #31
  24         .endm
  25 
  26         .macro arch_ret_to_user, tmp1, tmp2
  27         mrc     p15, 0, \tmp1, c15, c1, 0
  28         ands    \tmp2, \tmp1, #(1 << 6)
  29         bicne   \tmp1, \tmp1, #(1 << 6)
  30         mcrne   p15, 0, \tmp1, c15, c1, 0       @ Disable cp6 access
  31         .endm
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