hw/pci_host.c

   1 /*
   2  * pci_host.c
   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, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "pci.h"
  23 #include "pci_host.h"
  24
  25 /* debug PCI */
  26 //#define DEBUG_PCI
  27
  28 #ifdef DEBUG_PCI
  29 #define PCI_DPRINTF(fmt, ...) \
  30 do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0)
  31 #else
  32 #define PCI_DPRINTF(fmt, ...)
  33 #endif
  34
  35 /*
  36  * PCI address
  37  * bit 16 - 24: bus number
  38  * bit  8 - 15: devfun number
  39  * bit  0 -  7: offset in configuration space of a given pci device
  40  */
  41
  42 /* the helper functio to get a PCIDeice* for a given pci address */
  43 static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus, uint32_t addr)
  44 {
  45     uint8_t bus_num = addr >> 16;
  46     uint8_t devfn = addr >> 8;
  47
  48     return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
  49 }
  50
  51 void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len)
  52 {
  53     PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr);
  54     uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
  55
  56     if (!pci_dev)
  57         return;
  58
  59     PCI_DPRINTF("%s: %s: addr=%02" PRIx32 " val=%08" PRIx32 " len=%d\n",
  60                 __func__, pci_dev->name, config_addr, val, len);
  61     pci_dev->config_write(pci_dev, config_addr, val, len);
  62 }
  63
  64 uint32_t pci_data_read(PCIBus *s, uint32_t addr, int len)
  65 {
  66     PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr);
  67     uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1);
  68     uint32_t val;
  69
  70     assert(len == 1 || len == 2 || len == 4);
  71     if (!pci_dev) {
  72         return ~0x0;
  73     }
  74
  75     val = pci_dev->config_read(pci_dev, config_addr, len);
  76     PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n",
  77                 __func__, pci_dev->name, config_addr, val, len);
  78
  79     return val;
  80 }
  81
  82 static void pci_host_config_writel(void *opaque, target_phys_addr_t addr,
  83                                    uint32_t val)
  84 {
  85     PCIHostState *s = opaque;
  86
  87 #ifdef TARGET_WORDS_BIGENDIAN
  88     val = bswap32(val);
  89 #endif
  90     PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
  91                 __func__, addr, val);
  92     s->config_reg = val;
  93 }
  94
  95 static uint32_t pci_host_config_readl(void *opaque, target_phys_addr_t addr)
  96 {
  97     PCIHostState *s = opaque;
  98     uint32_t val = s->config_reg;
  99
 100 #ifdef TARGET_WORDS_BIGENDIAN
 101     val = bswap32(val);
 102 #endif
 103     PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
 104                 __func__, addr, val);
 105     return val;
 106 }
 107
 108 static CPUWriteMemoryFunc * const pci_host_config_write[] = {
 109     &pci_host_config_writel,
 110     &pci_host_config_writel,
 111     &pci_host_config_writel,
 112 };
 113
 114 static CPUReadMemoryFunc * const pci_host_config_read[] = {
 115     &pci_host_config_readl,
 116     &pci_host_config_readl,
 117     &pci_host_config_readl,
 118 };
 119
 120 int pci_host_conf_register_mmio(PCIHostState *s)
 121 {
 122     return cpu_register_io_memory(pci_host_config_read,
 123                                   pci_host_config_write, s);
 124 }
 125
 126 static void pci_host_config_writel_noswap(void *opaque,
 127                                           target_phys_addr_t addr,
 128                                           uint32_t val)
 129 {
 130     PCIHostState *s = opaque;
 131
 132     PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
 133                 __func__, addr, val);
 134     s->config_reg = val;
 135 }
 136
 137 static uint32_t pci_host_config_readl_noswap(void *opaque,
 138                                              target_phys_addr_t addr)
 139 {
 140     PCIHostState *s = opaque;
 141     uint32_t val = s->config_reg;
 142
 143     PCI_DPRINTF("%s addr " TARGET_FMT_plx " val %"PRIx32"\n",
 144                 __func__, addr, val);
 145     return val;
 146 }
 147
 148 static CPUWriteMemoryFunc * const pci_host_config_write_noswap[] = {
 149     &pci_host_config_writel_noswap,
 150     &pci_host_config_writel_noswap,
 151     &pci_host_config_writel_noswap,
 152 };
 153
 154 static CPUReadMemoryFunc * const pci_host_config_read_noswap[] = {
 155     &pci_host_config_readl_noswap,
 156     &pci_host_config_readl_noswap,
 157     &pci_host_config_readl_noswap,
 158 };
 159
 160 int pci_host_conf_register_mmio_noswap(PCIHostState *s)
 161 {
 162     return cpu_register_io_memory(pci_host_config_read_noswap,
 163                                   pci_host_config_write_noswap, s);
 164 }
 165
 166 static void pci_host_config_writel_ioport(void *opaque,
 167                                           uint32_t addr, uint32_t val)
 168 {
 169     PCIHostState *s = opaque;
 170
 171     PCI_DPRINTF("%s addr %"PRIx32 " val %"PRIx32"\n", __func__, addr, val);
 172     s->config_reg = val;
 173 }
 174
 175 static uint32_t pci_host_config_readl_ioport(void *opaque, uint32_t addr)
 176 {
 177     PCIHostState *s = opaque;
 178     uint32_t val = s->config_reg;
 179
 180     PCI_DPRINTF("%s addr %"PRIx32" val %"PRIx32"\n", __func__, addr, val);
 181     return val;
 182 }
 183
 184 void pci_host_conf_register_ioport(pio_addr_t ioport, PCIHostState *s)
 185 {
 186     register_ioport_write(ioport, 4, 4, pci_host_config_writel_ioport, s);
 187     register_ioport_read(ioport, 4, 4, pci_host_config_readl_ioport, s);
 188 }
 189
 190 #define PCI_ADDR_T      target_phys_addr_t
 191 #define PCI_HOST_SUFFIX _mmio
 192
 193 #include "pci_host_template.h"
 194
 195 static CPUWriteMemoryFunc * const pci_host_data_write_mmio[] = {
 196     pci_host_data_writeb_mmio,
 197     pci_host_data_writew_mmio,
 198     pci_host_data_writel_mmio,
 199 };
 200
 201 static CPUReadMemoryFunc * const pci_host_data_read_mmio[] = {
 202     pci_host_data_readb_mmio,
 203     pci_host_data_readw_mmio,
 204     pci_host_data_readl_mmio,
 205 };
 206
 207 int pci_host_data_register_mmio(PCIHostState *s)
 208 {
 209     return cpu_register_io_memory(pci_host_data_read_mmio,
 210                                   pci_host_data_write_mmio,
 211                                   s);
 212 }
 213
 214 #undef PCI_ADDR_T
 215 #undef PCI_HOST_SUFFIX
 216
 217 #define PCI_ADDR_T      uint32_t
 218 #define PCI_HOST_SUFFIX _ioport
 219
 220 #include "pci_host_template.h"
 221
 222 void pci_host_data_register_ioport(pio_addr_t ioport, PCIHostState *s)
 223 {
 224     register_ioport_write(ioport, 4, 1, pci_host_data_writeb_ioport, s);
 225     register_ioport_write(ioport, 4, 2, pci_host_data_writew_ioport, s);
 226     register_ioport_write(ioport, 4, 4, pci_host_data_writel_ioport, s);
 227     register_ioport_read(ioport, 4, 1, pci_host_data_readb_ioport, s);
 228     register_ioport_read(ioport, 4, 2, pci_host_data_readw_ioport, s);
 229     register_ioport_read(ioport, 4, 4, pci_host_data_readl_ioport, s);
 230 }