irq_wd.s

LPC based lcd interface

/*
------------------------------------------------------------------------------
-    ATMEL Microcontroller Software Support  -   ROUSSET -
------------------------------------------------------------------------------
 The software is delivered "AS IS" without warranty or condition of any
 kind, either express, implied or statutory. This includes without
 limitation any warranty or condition with respect to merchantability or
 fitness for any particular purpose, or against the infringements of
 intellectual property rights of others.
-----------------------------------------------------------------------------
- File source          : irq_wd.s
- Object               : Assembler Watch Dog Interrupt Handler.
- Translator           : ARM Software Development Toolkit V2.11a
-
- Imported Resources   :
-          SaveWDHandler, PtWDBase
- Exported Resources   :
-          watch_dog_interrupt_handler
-
- 1.0 JCZ 03/12/97     : Creation
- 1.1 JCZ 15/09/98     : See irq.mac 1.1
- 2.0 JCZ 21/10/98     : Clean up and add interworking capabilities
------------------------------------------------------------------------------
 Function :
 This file allows to branch a C interrupt handler when a Watch Dog interrupt
 occurs. The address of the C handler is stored in the variable
 <SaveWDHandler> by the execution of the C function <init_watch_dog>.
------------------------------------------------------------------------------
*/
/*            AREA        AT91Lib, CODE, READONLY, INTERWORK
*/

/* -------------------------- List of Included Files --------------------------- */

            .include     "../Include/arm.inc"
            .INCLUDE     "../Include/wd.inc"
            .INCLUDE     "../Include/aic.inc"
            .INCLUDE     "../Include/irq.mac"

/* ------------------------ List of constants and types ------------------------ */
/* None */

/* ------------------------ List of Imported resources ------------------------- */

            .extern      SaveWDHandler

/* ------------------------ List of Internal resources ------------------------- */
PtWDBase:
            .long         WD_BASE
/*
 ------------------------ List of Exported resources -------------------------

------------------------------------------------------------------------------ 
- Function             : watch_dog_interrupt_handler
- Treatments           : Watch Dog Interrupt Handler.
- Input Parameters     : r14=lr= interrupt instruction address + 4
-                      : SPSR=CPSR when when core interrupted
- Output Parameters    : None
- Registers lost       : None
- Called Functions     : The interrupt handler saved in <SaveWDHandler>.
- Called Macros        : IRQ_ENTRY, IRQ_EXIT
------------------------------------------------------------------------------
*/
            .global      watch_dog_interrupt_handler

watch_dog_interrupt_handler:

/*-  Manage interrupt entry */
            IRQ_ENTRY

/*- Load the Watch Dog Base Address */
            ldr         r0, PtWDBase

/*- Branch on C Watch Dog Handler */
            ldr         r1, =SaveWDHandler
            ldr         r1, [r1]
            mov         r14, pc
            bx          r1

/*-  Manage interrupt exit */
            IRQ_EXIT