1 /* 2 * QEMU Common PCI Host bridge configuration data space access routines. 3 * 4 * Copyright (c) 2006 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 /* Worker routines for a PCI host controller that uses an {address,data} 26 register pair to access PCI configuration space. */ 27 28 /* debug PCI */ 29 //#define DEBUG_PCI 30 31 #ifdef DEBUG_PCI 32 #define PCI_DPRINTF(fmt, ...) \ 33 do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0) 34 #else 35 #define PCI_DPRINTF(fmt, ...) 36 #endif 37 struct PCIHostState { 38 uint32_t config_reg; 39 PCIBus *bus; 40 }; 41 42 static void pci_host_data_writeb(void* opaque, pci_addr_t addr, uint32_t val) 43 { 44 PCIHostState *s = opaque; 45 46 PCI_DPRINTF("writeb addr " TARGET_FMT_plx " val %x\n", 47 (hwaddr)addr, val); 48 if (s->config_reg & (1u << 31)) 49 pci_data_write(s->bus, s->config_reg | (addr & 3), val, 1); 50 } 51 52 static void pci_host_data_writew(void* opaque, pci_addr_t addr, uint32_t val) 53 { 54 PCIHostState *s = opaque; 55 #ifdef TARGET_WORDS_BIGENDIAN 56 val = bswap16(val); 57 #endif 58 PCI_DPRINTF("writew addr " TARGET_FMT_plx " val %x\n", 59 (hwaddr)addr, val); 60 if (s->config_reg & (1u << 31)) 61 pci_data_write(s->bus, s->config_reg | (addr & 3), val, 2); 62 } 63 64 static void pci_host_data_writel(void* opaque, pci_addr_t addr, uint32_t val) 65 { 66 PCIHostState *s = opaque; 67 #ifdef TARGET_WORDS_BIGENDIAN 68 val = bswap32(val); 69 #endif 70 PCI_DPRINTF("writel addr " TARGET_FMT_plx " val %x\n", 71 (hwaddr)addr, val); 72 if (s->config_reg & (1u << 31)) 73 pci_data_write(s->bus, s->config_reg, val, 4); 74 } 75 76 static uint32_t pci_host_data_readb(void* opaque, pci_addr_t addr) 77 { 78 PCIHostState *s = opaque; 79 uint32_t val; 80 81 if (!(s->config_reg & (1 << 31))) 82 return 0xff; 83 val = pci_data_read(s->bus, s->config_reg | (addr & 3), 1); 84 PCI_DPRINTF("readb addr " TARGET_FMT_plx " val %x\n", 85 (hwaddr)addr, val); 86 return val; 87 } 88 89 static uint32_t pci_host_data_readw(void* opaque, pci_addr_t addr) 90 { 91 PCIHostState *s = opaque; 92 uint32_t val; 93 if (!(s->config_reg & (1 << 31))) 94 return 0xffff; 95 val = pci_data_read(s->bus, s->config_reg | (addr & 3), 2); 96 PCI_DPRINTF("readw addr " TARGET_FMT_plx " val %x\n", 97 (hwaddr)addr, val); 98 #ifdef TARGET_WORDS_BIGENDIAN 99 val = bswap16(val); 100 #endif 101 return val; 102 } 103 104 static uint32_t pci_host_data_readl(void* opaque, pci_addr_t addr) 105 { 106 PCIHostState *s = opaque; 107 uint32_t val; 108 if (!(s->config_reg & (1 << 31))) 109 return 0xffffffff; 110 val = pci_data_read(s->bus, s->config_reg | (addr & 3), 4); 111 PCI_DPRINTF("readl addr " TARGET_FMT_plx " val %x\n", 112 (hwaddr)addr, val); 113 #ifdef TARGET_WORDS_BIGENDIAN 114 val = bswap32(val); 115 #endif 116 return val; 117 } 118
