motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 15:53:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

pci: Add generic PCIe host bridge

Browse source 
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>
This commit is contained in:
Alexander Graf 2015-02-13 05:46:07 +00:00 • committed by Peter Maydell
parent bf439db499
commit 4d8fde1126
3 changed files with 211 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

56
include/hw/pci-host/gpex.h Normal file
View file

@ -0,0 +1,56 @@
/*
* 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 */