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  * $Id: int-handler.S,v 1.1 2005/03/16 13:50:00 wbx Exp $
  13  */
  14
  15 #include <linux/config.h>
  16
  17 #include <asm/asm.h>
  18 #include <asm/mipsregs.h>
  19 #include <asm/regdef.h>
  20 #include <asm/stackframe.h>
  21
  22 /*
  23  *      MIPS IRQ        Source
  24  *      --------        ------
  25  *             0        Software (ignored)
  26  *             1        Software (ignored)
  27  *             2        Combined hardware interrupt (hw0)
  28  *             3        Hardware
  29  *             4        Hardware
  30  *             5        Hardware
  31  *             6        Hardware
  32  *             7        R4k timer
  33  */
  34
  35         .text
  36         .set    noreorder
  37         .set    noat
  38         .align  5
  39         NESTED(brcmIRQ, PT_SIZE, sp)
  40         SAVE_ALL
  41         CLI
  42         .set    at
  43     .set    noreorder
  44
  45         jal         brcm_irq_dispatch
  46          move   a0, sp
  47
  48         j           ret_from_irq
  49          nop
  50
  51         END(brcmIRQ)