git.oblomov.eu Git - linux-2.6/blob - arch/arm/mach-clps711x/include/mach/entry-macro.S

   1 /*
   2  * arch/arm/mach-clps711x/include/mach/entry-macro.S
   3  *
   4  * Low-level IRQ helper macros for CLPS711X-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 <asm/hardware/clps7111.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 #if (INTSR2 - INTSR1) != (INTMR2 - INTMR1)
  23 #error INTSR stride != INTMR stride
  24 #endif
  25
  26                 .macro  get_irqnr_and_base, irqnr, stat, base, mask
  27                 mov     \base, #CLPS7111_BASE
  28                 ldr     \stat, [\base, #INTSR1]
  29                 ldr     \mask, [\base, #INTMR1]
  30                 mov     \irqnr, #4
  31                 mov     \mask, \mask, lsl #16
  32                 and     \stat, \stat, \mask, lsr #16
  33                 movs    \stat, \stat, lsr #4
  34                 bne     1001f
  35
  36                 add     \base, \base, #INTSR2 - INTSR1
  37                 ldr     \stat, [\base, #INTSR1]
  38                 ldr     \mask, [\base, #INTMR1]
  39                 mov     \irqnr, #16
  40                 mov     \mask, \mask, lsl #16
  41                 and     \stat, \stat, \mask, lsr #16
  42
  43 1001:           tst     \stat, #255
  44                 addeq   \irqnr, \irqnr, #8
  45                 moveq   \stat, \stat, lsr #8
  46                 tst     \stat, #15
  47                 addeq   \irqnr, \irqnr, #4
  48                 moveq   \stat, \stat, lsr #4
  49                 tst     \stat, #3
  50                 addeq   \irqnr, \irqnr, #2
  51                 moveq   \stat, \stat, lsr #2
  52                 tst     \stat, #1
  53                 addeq   \irqnr, \irqnr, #1
  54                 moveq   \stat, \stat, lsr #1
  55                 tst     \stat, #1                       @ bit 0 should be set
  56                 .endm
  57
  58