1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
103 lines
2.6 KiB
ArmAsm
103 lines
2.6 KiB
ArmAsm
/*
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* linux/arch/mips/tx4927/common/tx4927_irq_handler.S
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*
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* Primary interrupt handler for tx4927 based systems
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*
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* Author: MontaVista Software, Inc.
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* Author: jsun@mvista.com or jsun@junsun.net
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* source@mvista.com
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*
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* Copyright 2001-2002 MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <asm/asm.h>
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#include <asm/mipsregs.h>
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#include <asm/addrspace.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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#include <asm/tx4927/tx4927.h>
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.align 5
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NESTED(tx4927_irq_handler, PT_SIZE, sp)
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SAVE_ALL
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CLI
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.set at
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mfc0 t0, CP0_CAUSE
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mfc0 t1, CP0_STATUS
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and t0, t1
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andi t1, t0, STATUSF_IP7 /* cpu timer */
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bnez t1, ll_ip7
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/* IP6..IP3 multiplexed -- do not use */
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andi t1, t0, STATUSF_IP2 /* tx4927 pic */
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bnez t1, ll_ip2
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andi t1, t0, STATUSF_IP0 /* user line 0 */
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bnez t1, ll_ip0
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andi t1, t0, STATUSF_IP1 /* user line 1 */
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bnez t1, ll_ip1
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.set reorder
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/* wrong alarm or masked ... */
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j spurious_interrupt
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nop
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END(tx4927_irq_handler)
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.align 5
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ll_ip7:
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li a0, TX4927_IRQ_CPU_TIMER
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move a1, sp
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jal do_IRQ
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j ret_from_irq
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ll_ip2:
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jal tx4927_irq_nested
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nop
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beqz v0, goto_spurious_interrupt
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nop
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move a0, v0
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move a1, sp
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jal do_IRQ
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j ret_from_irq
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goto_spurious_interrupt:
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j spurious_interrupt
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nop
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ll_ip1:
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li a0, TX4927_IRQ_USER1
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move a1, sp
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jal do_IRQ
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j ret_from_irq
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ll_ip0:
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li a0, TX4927_IRQ_USER0
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move a1, sp
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jal do_IRQ
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j ret_from_irq
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