target/linux/brcm-2.4/files/arch/mips/bcm947xx/generic/int-handler.S

   1 /*
   2  * Generic interrupt handler for Broadcom MIPS boards
   3  *
   4  * Copyright 2004, Broadcom Corporation
   5  * All Rights Reserved.
   6  *
   7  * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
   8  * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
   9  * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
  10  * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
  11  *
  12  */
  13
  14 #include <linux/config.h>
  15
  16 #include <asm/asm.h>
  17 #include <asm/mipsregs.h>
  18 #include <asm/regdef.h>
  19 #include <asm/stackframe.h>
  20
  21 /*
  22  *      MIPS IRQ        Source
  23  *      --------        ------
  24  *             0        Software (ignored)
  25  *             1        Software (ignored)
  26  *             2        Combined hardware interrupt (hw0)
  27  *             3        Hardware
  28  *             4        Hardware
  29  *             5        Hardware
  30  *             6        Hardware
  31  *             7        R4k timer
  32  */
  33
  34         .text
  35         .set    noreorder
  36         .set    noat
  37         .align  5
  38         NESTED(brcmIRQ, PT_SIZE, sp)
  39         SAVE_ALL
  40         CLI
  41         .set    at
  42     .set    noreorder
  43
  44         jal         brcm_irq_dispatch
  45          move   a0, sp
  46
  47         j           ret_from_irq
  48          nop
  49
  50         END(brcmIRQ)