4d8fde1126
With simple exposure of MMFG, ioport window, mmio window and an IRQ line we can successfully create a workable PCIe host bridge that can be mapped anywhere and only needs to get described to the OS using whatever means it likes. This patch implements such a "generic" host bridge. It handles 4 legacy IRQ lines. MSIs need to be handled external to the host bridge. This device is particularly useful for the "pci-host-ecam-generic" driver in Linux. Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com> Tested-by: Claudio Fontana <claudio.fontana@huawei.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
/*
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* QEMU Generic PCI Express Bridge Emulation
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*
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* Copyright (C) 2015 Alexander Graf <agraf@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef HW_GPEX_H
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#define HW_GPEX_H
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#include "hw/hw.h"
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#include "hw/sysbus.h"
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#include "hw/pci/pci.h"
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#include "hw/pci/pcie_host.h"
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#define TYPE_GPEX_HOST "gpex-pcihost"
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#define GPEX_HOST(obj) \
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OBJECT_CHECK(GPEXHost, (obj), TYPE_GPEX_HOST)
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#define TYPE_GPEX_ROOT_DEVICE "gpex-root"
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#define MCH_PCI_DEVICE(obj) \
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OBJECT_CHECK(GPEXRootState, (obj), TYPE_GPEX_ROOT_DEVICE)
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#define GPEX_NUM_IRQS 4
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typedef struct GPEXRootState {
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/*< private >*/
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PCIDevice parent_obj;
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/*< public >*/
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} GPEXRootState;
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typedef struct GPEXHost {
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/*< private >*/
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PCIExpressHost parent_obj;
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/*< public >*/
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GPEXRootState gpex_root;
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MemoryRegion io_ioport;
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MemoryRegion io_mmio;
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qemu_irq irq[GPEX_NUM_IRQS];
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} GPEXHost;
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#endif /* HW_GPEX_H */
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