arch/mips/sgi-ip27/ip27-irq-glue.S

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 1999 Ralf Baechle
   7  * Copyright (C) 1999 Silicon Graphics, Inc.
   8  */
   9 #include <asm/asm.h>
  10 #include <asm/mipsregs.h>
  11 #include <asm/regdef.h>
  12 #include <asm/stackframe.h>
  13
  14         .text
  15         .align  5
  16 NESTED(ip27_irq, PT_SIZE, sp)
  17         SAVE_ALL
  18         CLI
  19
  20         mfc0    s0, CP0_CAUSE
  21         mfc0    t0, CP0_STATUS
  22         and     s0, t0
  23         move    a0, sp
  24         PTR_LA  ra, ret_from_irq
  25
  26         /* First check for RT interrupt.  */
  27         andi    t0, s0, CAUSEF_IP4
  28         bnez    t0, ip4
  29         andi    t0, s0, CAUSEF_IP2
  30         bnez    t0, ip2
  31         andi    t0, s0, CAUSEF_IP3
  32         bnez    t0, ip3
  33         andi    t0, s0, CAUSEF_IP5
  34         bnez    t0, ip5
  35         andi    t0, s0, CAUSEF_IP6
  36         bnez    t0, ip6
  37         j       ra
  38
  39 ip2:    j       ip27_do_irq_mask0       # PI_INT_PEND_0 or CC_PEND_{A|B}
  40 ip3:    j       ip27_do_irq_mask1       # PI_INT_PEND_1
  41 ip4:    j       ip27_rt_timer_interrupt
  42 ip5:    j       ip27_prof_timer
  43 ip6:    j       ip27_hub_error
  44
  45         END(ip27_irq)