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

   1 #include <asm/assembler.h>
   2
   3 /*
   4  * Interrupt handling.  Preserves r7, r8, r9
   5  */
   6         .macro  arch_irq_handler_default
   7         get_irqnr_preamble r6, lr
   8 1:      get_irqnr_and_base r0, r2, r6, lr
   9         movne   r1, sp
  10         @
  11         @ routine called with r0 = irq number, r1 = struct pt_regs *
  12         @
  13         adrne   lr, BSYM(1b)
  14         bne     asm_do_IRQ
  15
  16 #ifdef CONFIG_SMP
  17         /*
  18          * XXX
  19          *
  20          * this macro assumes that irqstat (r2) and base (r6) are
  21          * preserved from get_irqnr_and_base above
  22          */
  23         ALT_SMP(test_for_ipi r0, r2, r6, lr)
  24         ALT_UP_B(9997f)
  25         movne   r1, sp
  26         adrne   lr, BSYM(1b)
  27         bne     do_IPI
  28 #endif
  29 9997:
  30         .endm
  31
  32         .macro  arch_irq_handler, symbol_name
  33         .align  5
  34         .global \symbol_name
  35 \symbol_name:
  36         mov     r8, lr
  37         arch_irq_handler_default
  38         mov     pc, r8
  39         .endm