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46 lines
949 B
46 lines
949 B
20 years ago
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1999 Ralf Baechle
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* Copyright (C) 1999 Silicon Graphics, Inc.
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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/regdef.h>
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#include <asm/stackframe.h>
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.text
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.align 5
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NESTED(ip27_irq, PT_SIZE, sp)
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SAVE_ALL
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CLI
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mfc0 s0, CP0_CAUSE
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mfc0 t0, CP0_STATUS
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and s0, t0
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move a0, sp
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PTR_LA ra, ret_from_irq
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/* First check for RT interrupt. */
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andi t0, s0, CAUSEF_IP4
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bnez t0, ip4
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andi t0, s0, CAUSEF_IP2
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bnez t0, ip2
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andi t0, s0, CAUSEF_IP3
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bnez t0, ip3
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andi t0, s0, CAUSEF_IP5
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bnez t0, ip5
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andi t0, s0, CAUSEF_IP6
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bnez t0, ip6
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j ra
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ip2: j ip27_do_irq_mask0 # PI_INT_PEND_0 or CC_PEND_{A|B}
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ip3: j ip27_do_irq_mask1 # PI_INT_PEND_1
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ip4: j ip27_rt_timer_interrupt
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ip5: j ip27_prof_timer
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ip6: j ip27_hub_error
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END(ip27_irq)
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