| 1 | /* |
| 2 | * pcie_host.h |
| 3 | * |
| 4 | * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> |
| 5 | * VA Linux Systems Japan K.K. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License as published by |
| 9 | * the Free Software Foundation; either version 2 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #ifndef PCIE_HOST_H |
| 22 | #define PCIE_HOST_H |
| 23 | |
| 24 | #include "hw/pci/pci_host.h" |
| 25 | #include "system/memory.h" |
| 26 | #include "qom/object.h" |
| 27 | |
| 28 | #define TYPE_PCIE_HOST_BRIDGE "pcie-host-bridge" |
| 29 | OBJECT_DECLARE_SIMPLE_TYPE(PCIExpressHost, PCIE_HOST_BRIDGE) |
| 30 | |
| 31 | #define PCIE_HOST_MCFG_BASE "MCFG" |
| 32 | #define PCIE_HOST_MCFG_SIZE "mcfg_size" |
| 33 | |
| 34 | /* pcie_host::base_addr == PCIE_BASE_ADDR_UNMAPPED when it isn't mapped. */ |
| 35 | #define PCIE_BASE_ADDR_UNMAPPED ((hwaddr)-1ULL) |
| 36 | |
| 37 | struct PCIExpressHost { |
| 38 | PCIHostState pci; |
| 39 | |
| 40 | /* express part */ |
| 41 | |
| 42 | /* base address where MMCONFIG area is mapped. */ |
| 43 | hwaddr base_addr; |
| 44 | |
| 45 | /* the size of MMCONFIG area. It's host bridge dependent */ |
| 46 | hwaddr size; |
| 47 | |
| 48 | /* MMCONFIG mmio area */ |
| 49 | MemoryRegion mmio; |
| 50 | }; |
| 51 | |
| 52 | void pcie_host_mmcfg_unmap(PCIExpressHost *e); |
| 53 | void pcie_host_mmcfg_init(PCIExpressHost *e, uint32_t size); |
| 54 | void pcie_host_mmcfg_map(PCIExpressHost *e, hwaddr addr, uint32_t size); |
| 55 | void pcie_host_mmcfg_update(PCIExpressHost *e, |
| 56 | int enable, |
| 57 | hwaddr addr, |
| 58 | uint32_t size); |
| 59 | |
| 60 | /* |
| 61 | * PCI express ECAM (Enhanced Configuration Address Mapping) format. |
| 62 | * AKA mmcfg address |
| 63 | * bit 20 - 27: bus number |
| 64 | * bit 15 - 19: device number |
| 65 | * bit 12 - 14: function number |
| 66 | * bit 0 - 11: offset in configuration space of a given device |
| 67 | */ |
| 68 | #define PCIE_MMCFG_SIZE_MAX (1ULL << 28) |
| 69 | #define PCIE_MMCFG_SIZE_MIN (1ULL << 20) |
| 70 | #define PCIE_MMCFG_BUS_BIT 20 |
| 71 | #define PCIE_MMCFG_BUS_MASK 0xff |
| 72 | #define PCIE_MMCFG_DEVFN_BIT 12 |
| 73 | #define PCIE_MMCFG_DEVFN_MASK 0xff |
| 74 | #define PCIE_MMCFG_CONFOFFSET_MASK 0xfff |
| 75 | #define PCIE_MMCFG_BUS(addr) (((addr) >> PCIE_MMCFG_BUS_BIT) & \ |
| 76 | PCIE_MMCFG_BUS_MASK) |
| 77 | #define PCIE_MMCFG_DEVFN(addr) (((addr) >> PCIE_MMCFG_DEVFN_BIT) & \ |
| 78 | PCIE_MMCFG_DEVFN_MASK) |
| 79 | #define PCIE_MMCFG_CONFOFFSET(addr) ((addr) & PCIE_MMCFG_CONFOFFSET_MASK) |
| 80 | |
| 81 | #endif /* PCIE_HOST_H */ |