target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/include/mach/entry-macro.S

   1 #include <mach/hardware.h>
   2                 .macro  disable_fiq
   3                 .endm
   4
   5                 .macro arch_ret_to_user, tmp1, tmp2
   6                 .endm
   7
   8                 .macro  get_irqnr_preamble, base, tmp
   9                 ldr     \base, =mcs814x_intc_base       @ base virtual address of AIC peripheral
  10                 ldr     \base, [\base]
  11                 .endm
  12
  13                 .macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
  14                 mov     \tmp, #0x40
  15                 ldr     \irqstat, [\base, \tmp]
  16                 tst     \irqstat, \irqstat       @ test if no active IRQ's
  17                 beq     1002f                    @ if no active irqs return with status 0
  18                 mov     \irqnr, #0               @ start from irq zero
  19                 mov     \tmp,   #1               @ the mask initially 1
  20 1001:
  21                 tst     \irqstat, \tmp           @ and with mask
  22                 addeq   \irqnr, \irqnr, #1       @ if  zero then add one to nr
  23                 moveq   \tmp,   \tmp, lsl #1     @ shift mask one to left
  24                 beq     1001b                    @ if  zero then loop again
  25                 mov     \irqstat, \tmp           @ save the return mask
  26                 mov     \tmp, #0x00              @ ICR offset
  27                 str     \irqstat,  [\base, \tmp] @ clear irq with selected mask
  28 1002:
  29                 .endm