From 4d8fde1126419c5a858926a457a9b320a27a921a Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Fri, 13 Feb 2015 05:46:07 +0000 Subject: pci: Add generic PCIe host bridge 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 Reviewed-by: Claudio Fontana Tested-by: Claudio Fontana Signed-off-by: Peter Maydell --- include/hw/pci-host/gpex.h | 56 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 include/hw/pci-host/gpex.h (limited to 'include/hw/pci-host') diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h new file mode 100644 index 0000000..68c9348 --- /dev/null +++ b/include/hw/pci-host/gpex.h @@ -0,0 +1,56 @@ +/* + * QEMU Generic PCI Express Bridge Emulation + * + * Copyright (C) 2015 Alexander Graf + * + * 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 + */ + +#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 */ -- cgit v1.1