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/*
* pcie_host.h
*
* Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
* 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 General Public License along
* with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef PCIE_HOST_H
#define PCIE_HOST_H
#include "hw/pci/pci_host.h"
#include "exec/memory.h"
#define TYPE_PCIE_HOST_BRIDGE "pcie-host-bridge"
#define PCIE_HOST_BRIDGE(obj) \
OBJECT_CHECK(PCIExpressHost, (obj), TYPE_PCIE_HOST_BRIDGE)
#define PCIE_HOST_MCFG_BASE "MCFG"
#define PCIE_HOST_MCFG_SIZE "mcfg_size"
/* pcie_host::base_addr == PCIE_BASE_ADDR_UNMAPPED when it isn't mapped. */
#define PCIE_BASE_ADDR_UNMAPPED ((hwaddr)-1ULL)
struct PCIExpressHost {
PCIHostState pci;
/* express part */
/* base address where MMCONFIG area is mapped. */
hwaddr base_addr;
/* the size of MMCONFIG area. It's host bridge dependent */
hwaddr size;
/* MMCONFIG mmio area */
MemoryRegion mmio;
};
int pcie_host_init(PCIExpressHost *e);
void pcie_host_mmcfg_unmap(PCIExpressHost *e);
void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr, uint32_t size);
void pcie_host_mmcfg_update(PCIExpressHost *e,
int enable,
hwaddr addr,
uint32_t size);
/*
* PCI express ECAM (Enhanced Configuration Address Mapping) format.
* AKA mmcfg address
* bit 20 - 28: bus number
* bit 15 - 19: device number
* bit 12 - 14: function number
* bit 0 - 11: offset in configuration space of a given device
*/
#define PCIE_MMCFG_SIZE_MAX (1ULL << 28)
#define PCIE_MMCFG_SIZE_MIN (1ULL << 20)
#define PCIE_MMCFG_BUS_BIT 20
#define PCIE_MMCFG_BUS_MASK 0x1ff
#define PCIE_MMCFG_DEVFN_BIT 12
#define PCIE_MMCFG_DEVFN_MASK 0xff
#define PCIE_MMCFG_CONFOFFSET_MASK 0xfff
#define PCIE_MMCFG_BUS(addr) (((addr) >> PCIE_MMCFG_BUS_BIT) & \
PCIE_MMCFG_BUS_MASK)
#define PCIE_MMCFG_DEVFN(addr) (((addr) >> PCIE_MMCFG_DEVFN_BIT) & \
PCIE_MMCFG_DEVFN_MASK)
#define PCIE_MMCFG_CONFOFFSET(addr) ((addr) & PCIE_MMCFG_CONFOFFSET_MASK)
#endif /* PCIE_HOST_H */
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