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
/*
|
|
* QEMU Generic PCI Express Bridge Emulation
|
|
*
|
|
* Copyright (C) 2015 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>
|
|
*/
|
|
|
|
#ifndef HW_GPEX_H
|
|
#define HW_GPEX_H
|
|
|
|
#include "hw/hw.h"
|
|
#include "hw/sysbus.h"
|
|
#include "hw/pci/pci.h"
|
|
#include "hw/pci/pcie_host.h"
|
|
|
|
#define TYPE_GPEX_HOST "gpex-pcihost"
|
|
#define GPEX_HOST(obj) \
|
|
OBJECT_CHECK(GPEXHost, (obj), TYPE_GPEX_HOST)
|
|
|
|
#define TYPE_GPEX_ROOT_DEVICE "gpex-root"
|
|
#define MCH_PCI_DEVICE(obj) \
|
|
OBJECT_CHECK(GPEXRootState, (obj), TYPE_GPEX_ROOT_DEVICE)
|
|
|
|
#define GPEX_NUM_IRQS 4
|
|
|
|
typedef struct GPEXRootState {
|
|
/*< private >*/
|
|
PCIDevice parent_obj;
|
|
/*< public >*/
|
|
} GPEXRootState;
|
|
|
|
typedef struct GPEXHost {
|
|
/*< private >*/
|
|
PCIExpressHost parent_obj;
|
|
/*< public >*/
|
|
|
|
GPEXRootState gpex_root;
|
|
|
|
MemoryRegion io_ioport;
|
|
MemoryRegion io_mmio;
|
|
qemu_irq irq[GPEX_NUM_IRQS];
|
|
} GPEXHost;
|
|
|
|
#endif /* HW_GPEX_H */
|