You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.6 KiB
103 lines
2.6 KiB
/*
|
|
* linux/arch/mips/tx4927/common/tx4927_irq_handler.S
|
|
*
|
|
* Primary interrupt handler for tx4927 based systems
|
|
*
|
|
* Author: MontaVista Software, Inc.
|
|
* Author: jsun@mvista.com or jsun@junsun.net
|
|
* source@mvista.com
|
|
*
|
|
* Copyright 2001-2002 MontaVista Software Inc.
|
|
*
|
|
* This program 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 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
|
|
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
|
|
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include <asm/asm.h>
|
|
#include <asm/mipsregs.h>
|
|
#include <asm/addrspace.h>
|
|
#include <asm/regdef.h>
|
|
#include <asm/stackframe.h>
|
|
#include <asm/tx4927/tx4927.h>
|
|
|
|
.align 5
|
|
NESTED(tx4927_irq_handler, PT_SIZE, sp)
|
|
SAVE_ALL
|
|
CLI
|
|
.set at
|
|
|
|
mfc0 t0, CP0_CAUSE
|
|
mfc0 t1, CP0_STATUS
|
|
and t0, t1
|
|
|
|
andi t1, t0, STATUSF_IP7 /* cpu timer */
|
|
bnez t1, ll_ip7
|
|
|
|
/* IP6..IP3 multiplexed -- do not use */
|
|
|
|
andi t1, t0, STATUSF_IP2 /* tx4927 pic */
|
|
bnez t1, ll_ip2
|
|
|
|
andi t1, t0, STATUSF_IP0 /* user line 0 */
|
|
bnez t1, ll_ip0
|
|
|
|
andi t1, t0, STATUSF_IP1 /* user line 1 */
|
|
bnez t1, ll_ip1
|
|
|
|
.set reorder
|
|
|
|
/* wrong alarm or masked ... */
|
|
j spurious_interrupt
|
|
nop
|
|
END(tx4927_irq_handler)
|
|
|
|
.align 5
|
|
|
|
|
|
ll_ip7:
|
|
li a0, TX4927_IRQ_CPU_TIMER
|
|
move a1, sp
|
|
jal do_IRQ
|
|
j ret_from_irq
|
|
|
|
ll_ip2:
|
|
jal tx4927_irq_nested
|
|
nop
|
|
beqz v0, goto_spurious_interrupt
|
|
nop
|
|
move a0, v0
|
|
move a1, sp
|
|
jal do_IRQ
|
|
j ret_from_irq
|
|
|
|
goto_spurious_interrupt:
|
|
j spurious_interrupt
|
|
nop
|
|
|
|
ll_ip1:
|
|
li a0, TX4927_IRQ_USER1
|
|
move a1, sp
|
|
jal do_IRQ
|
|
j ret_from_irq
|
|
|
|
ll_ip0:
|
|
li a0, TX4927_IRQ_USER0
|
|
move a1, sp
|
|
jal do_IRQ
|
|
j ret_from_irq
|
|
|