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//=============================================================================
//
//      irq.S - Cyclone Diagnostics
//
//=============================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with eCos; if not, write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
//
// As a special exception, if other files instantiate templates or use macros
// or inline functions from this file, or you compile this file and link it
// with other works to produce a work based on this file, this file does not
// by itself cause the resulting work to be covered by the GNU General Public
// License. However the source code for this file must still be made available
// in accordance with section (3) of the GNU General Public License.
//
// This exception does not invalidate any other reasons why a work based on
// this file might be covered by the GNU General Public License.
//
// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
// at http://sources.redhat.com/ecos/ecos-license/
// -------------------------------------------
//####ECOSGPLCOPYRIGHTEND####
//=============================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):   Scott Coulter, Jeff Frazier, Eric Breeden
// Contributors:
// Date:        2001-01-25
// Purpose:     
// Description: 
//
//####DESCRIPTIONEND####
//
//===========================================================================*/

/*
 * Low-lebvel interrupt support for IQ80310 diags
 */
        .extern iq80310_irq_handler
        .extern iq80310_fiq_handler

        .text
        .globl __diag_IRQ
  __diag_IRQ:
        ldr     sp, =__irq_stack    /* point stack pointer at IRQ stack */
        sub     lr, lr, #4         /* adjust lr (return to last address) */
        stmfd   sp!, {r12, lr}     /* push r12 and link reg onto stack */
        mrs     r12, spsr          /* store spsr in r12 */
        stmfd   sp!, {r12}         /* push spsr onto stack */
        stmfd   sp!, {r0-r11}      /* push all registers onto stack */
        bl      iq80310_irq_handler
        ldmfd   sp!, {r0-r12}      /* restore r0 thru r12 */
        msr     spsr, r12          /* restore SPSR */
        ldmfd   sp!, {r12,pc}^     /* restore r12 and PC, return */

        .globl __diag_FIQ
  __diag_FIQ:
        /* Cyclone FIQ handler */
        /* save registers onto stack */
        ldr     sp, =__fiq_stack        /* point stack pointer at FIQ stack */
        sub     lr, lr, #4      /* adjust link register (return to last address) */
        stmfd   sp!, {r12, lr}  /* push r12 and link reg onto stack */
        mrs     r12, spsr       /* store spsr in r12 */
        stmfd   sp!, {r12}      /* push spsr onto stack */
        stmfd   sp!, {r0-r7}    /* push r0 thru r7 (r8 - r14 are banked) */
        bl      iq80310_fiq_handler
        /* restore registers and return */
        ldmfd   sp!, {r0-r7}    /* restore r0 thru r7 (r8 - r14 are banked) */
        ldmfd   sp!, {r12}
        msr     spsr, r12       /* restore SPSR */
        ldmfd   sp!, {r12,pc}^  /* restore r12 and PC, return to inst before exception occurred */

        .globl __ignore_abort
__ignore_abort:
        subs pc,lr,#4

        .globl _cspr_enable_fiq_int
_cspr_enable_fiq_int:
        mrs     r0, cpsr
        bic     r0, r0, #0x40
        msr     cpsr, r0
        mov     pc, lr

        .globl _cspr_enable_irq_int
_cspr_enable_irq_int:
        mrs     r0, cpsr
        bic     r0, r0, #0x80
        msr     cpsr, r0
        mov     pc, lr

        .bss
        .rept 1024
        .word 0
        .endr
  __irq_stack:
        .rept 1024
        .word 0
        .endr
  __fiq_stack: