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 "exec/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 */ 82