hw/apb_pci.c

   1 /*
   2  * QEMU Ultrasparc APB PCI host
   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 /* XXX This file and most of its contents are somewhat misnamed.  The
  26    Ultrasparc PCI host is called the PCI Bus Module (PBM).  The APB is
  27    the secondary PCI bridge.  */
  28
  29 #include "sysbus.h"
  30 #include "pci.h"
  31 #include "pci_host.h"
  32 #include "apb_pci.h"
  33
  34 /* debug APB */
  35 //#define DEBUG_APB
  36
  37 #ifdef DEBUG_APB
  38 #define APB_DPRINTF(fmt, ...) \
  39 do { printf("APB: " fmt , ## __VA_ARGS__); } while (0)
  40 #else
  41 #define APB_DPRINTF(fmt, ...)
  42 #endif
  43
  44 /*
  45  * Chipset docs:
  46  * PBM: "UltraSPARC IIi User's Manual",
  47  * http://www.sun.com/processors/manuals/805-0087.pdf
  48  *
  49  * APB: "Advanced PCI Bridge (APB) User's Manual",
  50  * http://www.sun.com/processors/manuals/805-1251.pdf
  51  */
  52
  53 typedef struct APBState {
  54     SysBusDevice busdev;
  55     PCIHostState host_state;
  56 } APBState;
  57
  58 static void apb_config_writel (void *opaque, target_phys_addr_t addr,
  59                                uint32_t val)
  60 {
  61     //PCIBus *s = opaque;
  62
  63     switch (addr & 0x3f) {
  64     case 0x00: // Control/Status
  65     case 0x10: // AFSR
  66     case 0x18: // AFAR
  67     case 0x20: // Diagnostic
  68     case 0x28: // Target address space
  69         // XXX
  70     default:
  71         break;
  72     }
  73 }
  74
  75 static uint32_t apb_config_readl (void *opaque,
  76                                   target_phys_addr_t addr)
  77 {
  78     //PCIBus *s = opaque;
  79     uint32_t val;
  80
  81     switch (addr & 0x3f) {
  82     case 0x00: // Control/Status
  83     case 0x10: // AFSR
  84     case 0x18: // AFAR
  85     case 0x20: // Diagnostic
  86     case 0x28: // Target address space
  87         // XXX
  88     default:
  89         val = 0;
  90         break;
  91     }
  92     return val;
  93 }
  94
  95 static CPUWriteMemoryFunc * const apb_config_write[] = {
  96     &apb_config_writel,
  97     &apb_config_writel,
  98     &apb_config_writel,
  99 };
 100
 101 static CPUReadMemoryFunc * const apb_config_read[] = {
 102     &apb_config_readl,
 103     &apb_config_readl,
 104     &apb_config_readl,
 105 };
 106
 107 static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
 108                                   uint32_t val)
 109 {
 110     cpu_outb(addr & IOPORTS_MASK, val);
 111 }
 112
 113 static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
 114                                   uint32_t val)
 115 {
 116     cpu_outw(addr & IOPORTS_MASK, val);
 117 }
 118
 119 static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
 120                                 uint32_t val)
 121 {
 122     cpu_outl(addr & IOPORTS_MASK, val);
 123 }
 124
 125 static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
 126 {
 127     uint32_t val;
 128
 129     val = cpu_inb(addr & IOPORTS_MASK);
 130     return val;
 131 }
 132
 133 static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
 134 {
 135     uint32_t val;
 136
 137     val = cpu_inw(addr & IOPORTS_MASK);
 138     return val;
 139 }
 140
 141 static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
 142 {
 143     uint32_t val;
 144
 145     val = cpu_inl(addr & IOPORTS_MASK);
 146     return val;
 147 }
 148
 149 static CPUWriteMemoryFunc * const pci_apb_iowrite[] = {
 150     &pci_apb_iowriteb,
 151     &pci_apb_iowritew,
 152     &pci_apb_iowritel,
 153 };
 154
 155 static CPUReadMemoryFunc * const pci_apb_ioread[] = {
 156     &pci_apb_ioreadb,
 157     &pci_apb_ioreadw,
 158     &pci_apb_ioreadl,
 159 };
 160
 161 /* The APB host has an IRQ line for each IRQ line of each slot.  */
 162 static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
 163 {
 164     return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
 165 }
 166
 167 static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
 168 {
 169     int bus_offset;
 170     if (pci_dev->devfn & 1)
 171         bus_offset = 16;
 172     else
 173         bus_offset = 0;
 174     return bus_offset + irq_num;
 175 }
 176
 177 static void pci_apb_set_irq(void *opaque, int irq_num, int level)
 178 {
 179     qemu_irq *pic = opaque;
 180
 181     /* PCI IRQ map onto the first 32 INO.  */
 182     qemu_set_irq(pic[irq_num], level);
 183 }
 184
 185 static void apb_pci_bridge_init(PCIBus *b)
 186 {
 187     PCIDevice *dev = pci_bridge_get_device(b);
 188
 189     /*
 190      * command register:
 191      * According to PCI bridge spec, after reset
 192      *   bus master bit is off
 193      *   memory space enable bit is off
 194      * According to manual (805-1251.pdf).
 195      *   the reset value should be zero unless the boot pin is tied high
 196      *   (which is true) and thus it should be PCI_COMMAND_MEMORY.
 197      */
 198     pci_set_word(dev->config + PCI_COMMAND,
 199                  PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
 200     dev->config[PCI_LATENCY_TIMER] = 0x10;
 201     dev->config[PCI_HEADER_TYPE] |= PCI_HEADER_TYPE_MULTI_FUNCTION;
 202 }
 203
 204 PCIBus *pci_apb_init(target_phys_addr_t special_base,
 205                      target_phys_addr_t mem_base,
 206                      qemu_irq *pic, PCIBus **bus2, PCIBus **bus3)
 207 {
 208     DeviceState *dev;
 209     SysBusDevice *s;
 210     APBState *d;
 211
 212     /* Ultrasparc PBM main bus */
 213     dev = qdev_create(NULL, "pbm");
 214     qdev_init_nofail(dev);
 215     s = sysbus_from_qdev(dev);
 216     /* apb_config */
 217     sysbus_mmio_map(s, 0, special_base + 0x2000ULL);
 218     /* pci_ioport */
 219     sysbus_mmio_map(s, 1, special_base + 0x2000000ULL);
 220     /* mem_config: XXX size should be 4G-prom */
 221     sysbus_mmio_map(s, 2, special_base + 0x1000000ULL);
 222     /* mem_data */
 223     sysbus_mmio_map(s, 3, mem_base);
 224     d = FROM_SYSBUS(APBState, s);
 225     d->host_state.bus = pci_register_bus(&d->busdev.qdev, "pci",
 226                                          pci_apb_set_irq, pci_pbm_map_irq, pic,
 227                                          0, 32);
 228     pci_bus_set_mem_base(d->host_state.bus, mem_base);
 229
 230     pci_create_simple(d->host_state.bus, 0, "pbm");
 231     /* APB secondary busses */
 232     *bus2 = pci_bridge_init(d->host_state.bus, PCI_DEVFN(1, 0),
 233                             PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_SIMBA,
 234                             pci_apb_map_irq,
 235                             "Advanced PCI Bus secondary bridge 1");
 236     apb_pci_bridge_init(*bus2);
 237
 238     *bus3 = pci_bridge_init(d->host_state.bus, PCI_DEVFN(1, 1),
 239                             PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_SIMBA,
 240                             pci_apb_map_irq,
 241                             "Advanced PCI Bus secondary bridge 2");
 242     apb_pci_bridge_init(*bus3);
 243
 244     return d->host_state.bus;
 245 }
 246
 247 static int pci_pbm_init_device(SysBusDevice *dev)
 248 {
 249
 250     APBState *s;
 251     int pci_mem_config, pci_mem_data, apb_config, pci_ioport;
 252
 253     s = FROM_SYSBUS(APBState, dev);
 254     /* apb_config */
 255     apb_config = cpu_register_io_memory(apb_config_read,
 256                                         apb_config_write, s);
 257     sysbus_init_mmio(dev, 0x40ULL, apb_config);
 258     /* pci_ioport */
 259     pci_ioport = cpu_register_io_memory(pci_apb_ioread,
 260                                           pci_apb_iowrite, s);
 261     sysbus_init_mmio(dev, 0x10000ULL, pci_ioport);
 262     /* mem_config  */
 263     pci_mem_config = pci_host_conf_register_mmio(&s->host_state);
 264     sysbus_init_mmio(dev, 0x10ULL, pci_mem_config);
 265     /* mem_data */
 266     pci_mem_data = pci_host_data_register_mmio(&s->host_state);
 267     sysbus_init_mmio(dev, 0x10000000ULL, pci_mem_data);
 268     return 0;
 269 }
 270
 271 static int pbm_pci_host_init(PCIDevice *d)
 272 {
 273     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_SUN);
 274     pci_config_set_device_id(d->config, PCI_DEVICE_ID_SUN_SABRE);
 275     d->config[0x04] = 0x06; // command = bus master, pci mem
 276     d->config[0x05] = 0x00;
 277     d->config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
 278     d->config[0x07] = 0x03; // status = medium devsel
 279     d->config[0x08] = 0x00; // revision
 280     d->config[0x09] = 0x00; // programming i/f
 281     pci_config_set_class(d->config, PCI_CLASS_BRIDGE_HOST);
 282     d->config[0x0D] = 0x10; // latency_timer
 283     d->config[PCI_HEADER_TYPE] = PCI_HEADER_TYPE_NORMAL; // header_type
 284     return 0;
 285 }
 286
 287 static PCIDeviceInfo pbm_pci_host_info = {
 288     .qdev.name = "pbm",
 289     .qdev.size = sizeof(PCIDevice),
 290     .init      = pbm_pci_host_init,
 291 };
 292
 293 static void pbm_register_devices(void)
 294 {
 295     sysbus_register_dev("pbm", sizeof(APBState), pci_pbm_init_device);
 296     pci_qdev_register(&pbm_pci_host_info);
 297 }
 298
 299 device_init(pbm_register_devices)