arch/mips/galileo-boards/ev96100/int-handler.S

   1 #include <asm/asm.h>
   2 #include <asm/mipsregs.h>
   3 #include <asm/regdef.h>
   4 #include <asm/stackframe.h>
   5
   6         .set    noat
   7         .align  5
   8
   9 NESTED(ev96100IRQ, PT_SIZE, sp)
  10         SAVE_ALL
  11         CLI                             # Important: mark KERNEL mode !
  12
  13         mfc0    t0, CP0_CAUSE           # get pending interrupts
  14         mfc0    t1, CP0_STATUS          # get enabled interrupts
  15         and     t0, t1                  # isolate allowed ones
  16
  17         # FIX ME add R7000 extensions
  18         andi    t0,0xff00               # isolate pending bits
  19         andi    a0, t0, CAUSEF_IP7
  20         beq     a0, zero, 1f
  21         move    a0, sp
  22         jal     mips_timer_interrupt
  23         j       ret_from_irq
  24
  25 1:      beqz    t0, 3f                  # spurious interrupt
  26
  27         move    a0, t0
  28         move    a1, sp
  29         jal     ev96100_cpu_irq
  30         j       ret_from_irq
  31
  32 3:      j       spurious_interrupt
  33         END(ev96100IRQ)