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

   1 /*
   2  * Interrupt handling.  Preserves r7, r8, r9
   3  */
   4         .macro  arch_irq_handler_default
   5         get_irqnr_preamble r5, lr
   6 1:      get_irqnr_and_base r0, r6, r5, lr
   7         movne   r1, sp
   8         @
   9         @ routine called with r0 = irq number, r1 = struct pt_regs *
  10         @
  11         adrne   lr, BSYM(1b)
  12         bne     asm_do_IRQ
  13
  14 #ifdef CONFIG_SMP
  15         /*
  16          * XXX
  17          *
  18          * this macro assumes that irqstat (r6) and base (r5) are
  19          * preserved from get_irqnr_and_base above
  20          */
  21         ALT_SMP(test_for_ipi r0, r6, r5, lr)
  22         ALT_UP_B(9997f)
  23         movne   r1, sp
  24         adrne   lr, BSYM(1b)
  25         bne     do_IPI
  26
  27 #ifdef CONFIG_LOCAL_TIMERS
  28         test_for_ltirq r0, r6, r5, lr
  29         movne   r0, sp
  30         adrne   lr, BSYM(1b)
  31         bne     do_local_timer
  32 #endif
  33 #endif
  34 9997:
  35         .endm
  36
  37         .macro  arch_irq_handler, symbol_name
  38         .align  5
  39         .global \symbol_name
  40 \symbol_name:
  41         mov     r4, lr
  42         arch_irq_handler_default
  43         mov     pc, r4
  44         .endm