| /* |
| * 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 |
