85 lines
1.5 KiB
ArmAsm
85 lines
1.5 KiB
ArmAsm
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/*
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* linux/arch/mips/tx4938/common/handler.S
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*
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* Primary interrupt handler for tx4938 based systems
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* Copyright (C) 2000-2001 Toshiba Corporation
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*
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* 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
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* terms of the GNU General Public License version 2. This program is
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* licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*
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* Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
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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/tx4938/rbtx4938.h>
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.align 5
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NESTED(tx4938_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 /* tx4938 pic */
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bnez t1, ll_ip2
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andi t1, t0, STATUSF_IP1 /* user line 1 */
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bnez t1, ll_ip1
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andi t1, t0, STATUSF_IP0 /* user line 0 */
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bnez t1, ll_ip0
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.set reorder
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nop
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END(tx4938_irq_handler)
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.align 5
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ll_ip7:
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li a0, TX4938_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 tx4938_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 ret_from_irq
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ll_ip1:
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li a0, TX4938_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, TX4938_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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