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For the IoTKit MPC support, we need to wire together the interrupt outputs of 17 MPCs; this exceeds the current value of MAX_OR_LINES. Increase MAX_OR_LINES to 32 (which should be enough for anyone). The tricky part is retaining the migration compatibility for existing OR gates; we add a subsection which is only used for larger OR gates, and define it such that we can freely increase MAX_OR_LINES in future (or even move to a dynamically allocated levels[] array without an upper size limit) without breaking compatibility. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20180604152941.20374-10-peter.maydell@linaro.org
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* QEMU IRQ/GPIO common code.
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*
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* Copyright (c) 2016 Alistair Francis <alistair@alistair23.me>.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef HW_OR_IRQ_H
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#define HW_OR_IRQ_H
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#include "hw/irq.h"
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#include "hw/sysbus.h"
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#include "qom/object.h"
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#define TYPE_OR_IRQ "or-irq"
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/* This can safely be increased if necessary without breaking
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* migration compatibility (as long as it remains greater than 15).
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*/
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#define MAX_OR_LINES 32
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typedef struct OrIRQState qemu_or_irq;
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#define OR_IRQ(obj) OBJECT_CHECK(qemu_or_irq, (obj), TYPE_OR_IRQ)
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struct OrIRQState {
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DeviceState parent_obj;
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qemu_irq out_irq;
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bool levels[MAX_OR_LINES];
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uint16_t num_lines;
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};
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#endif
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