4 * Copyright (c) 2002 Wasabi Systems, Inc.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
39 #include "opt_perfctrs.h"
41 #include <machine/asm.h>
42 #include <machine/cpu.h>
43 #include <machine/frame.h>
45 #include <arm/xscale/i80200reg.h>
50 * Main entry point for the IRQ vector on i80200 CPUs. Calls
51 * board-specific external interrupt dispatch routine.
58 .word _C_LABEL(i80200_extirq_dispatch)
62 .word _C_LABEL(xscale_pmc_dispatch)
67 AST_ALIGNMENT_FAULT_LOCALS
70 sub lr, lr, #0x00000004 /* Adjust the lr */
72 PUSHFRAMEINSVC /* Push an interrupt frame */
73 ENABLE_ALIGNMENT_FAULTS
76 * Note that we have entered the IRQ handler. We are
77 * in SVC mode so we cannot use the processor mode to
78 * determine if we are in an IRQ. Instead, we will
79 * count each time the interrupt handler is nested.
81 ldr r1, [r4, #CI_INTR_DEPTH]
83 str r1, [r4, #CI_INTR_DEPTH]
86 * Get the interrupt status into a callee-save register.
88 mrc p13, 0, r5, c4, c0, 0
92 * Check for PMU interrupts.
93 * If we have one, call the routine to handle it.
100 ldr pc, .Lpmc_dispatch
105 * XXX - any need to handle BMU interrupts?
109 * Check for external IRQs. If we have one, call the
110 * external IRQ dispatcher. The argument is a pointer
111 * to the stack frame. This function will be called with
112 * interrupts disabled, and will return with interrupts
116 beq .Lextirq_return /* no external IRQ pending */
117 ldr r1, .Lintr_dispatch
123 /* Decremement the nest count. */
124 ldr r1, [r4, #CI_INTR_DEPTH]
126 str r1, [r4, #CI_INTR_DEPTH]
130 DO_AST_AND_RESTORE_ALIGNMENT_FAULTS
131 PULLFRAMEFROMSVCANDEXIT
132 movs pc, lr /* Exit */