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//=============================================================================
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//
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// irq.S - Cyclone Diagnostics
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//
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//=============================================================================
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//####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with eCos; if not, write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or inline functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. However the source code for this file must still be made available
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// in accordance with section (3) of the GNU General Public License.
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//
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// This exception does not invalidate any other reasons why a work based on
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// this file might be covered by the GNU General Public License.
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//
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// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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// at http://sources.redhat.com/ecos/ecos-license/
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// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
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//=============================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): Scott Coulter, Jeff Frazier, Eric Breeden
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// Contributors:
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// Date: 2001-01-25
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// Purpose:
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// Description:
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//
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//####DESCRIPTIONEND####
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//
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//===========================================================================*/
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/*
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* Low-lebvel interrupt support for IQ80310 diags
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*/
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.extern iq80310_irq_handler
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.extern iq80310_fiq_handler
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.text
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.globl __diag_IRQ
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__diag_IRQ:
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ldr sp, =__irq_stack /* point stack pointer at IRQ stack */
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sub lr, lr, #4 /* adjust lr (return to last address) */
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stmfd sp!, {r12, lr} /* push r12 and link reg onto stack */
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mrs r12, spsr /* store spsr in r12 */
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stmfd sp!, {r12} /* push spsr onto stack */
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stmfd sp!, {r0-r11} /* push all registers onto stack */
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bl iq80310_irq_handler
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ldmfd sp!, {r0-r12} /* restore r0 thru r12 */
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msr spsr, r12 /* restore SPSR */
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ldmfd sp!, {r12,pc}^ /* restore r12 and PC, return */
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.globl __diag_FIQ
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__diag_FIQ:
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/* Cyclone FIQ handler */
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/* save registers onto stack */
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ldr sp, =__fiq_stack /* point stack pointer at FIQ stack */
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sub lr, lr, #4 /* adjust link register (return to last address) */
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stmfd sp!, {r12, lr} /* push r12 and link reg onto stack */
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mrs r12, spsr /* store spsr in r12 */
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stmfd sp!, {r12} /* push spsr onto stack */
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stmfd sp!, {r0-r7} /* push r0 thru r7 (r8 - r14 are banked) */
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bl iq80310_fiq_handler
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/* restore registers and return */
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ldmfd sp!, {r0-r7} /* restore r0 thru r7 (r8 - r14 are banked) */
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ldmfd sp!, {r12}
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msr spsr, r12 /* restore SPSR */
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ldmfd sp!, {r12,pc}^ /* restore r12 and PC, return to inst before exception occurred */
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.globl __ignore_abort
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__ignore_abort:
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subs pc,lr,#4
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.globl _cspr_enable_fiq_int
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_cspr_enable_fiq_int:
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mrs r0, cpsr
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bic r0, r0, #0x40
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msr cpsr, r0
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mov pc, lr
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.globl _cspr_enable_irq_int
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_cspr_enable_irq_int:
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mrs r0, cpsr
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bic r0, r0, #0x80
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msr cpsr, r0
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mov pc, lr
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.bss
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.rept 1024
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.word 0
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.endr
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__irq_stack:
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.rept 1024
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.word 0
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.endr
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__fiq_stack:
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