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 contests 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 "vl.h"
  30 typedef target_phys_addr_t pci_addr_t;
  31 #include "pci_host.h"
  32
  33 typedef PCIHostState APBState;
  34
  35 static void pci_apb_config_writel (void *opaque, target_phys_addr_t addr,
  36                                          uint32_t val)
  37 {
  38     APBState *s = opaque;
  39     int i;
  40
  41     for (i = 11; i < 32; i++) {
  42         if ((val & (1 << i)) != 0)
  43             break;
  44     }
  45     s->config_reg = (1 << 16) | (val & 0x7FC) | (i << 11);
  46 }
  47
  48 static uint32_t pci_apb_config_readl (void *opaque,
  49                                             target_phys_addr_t addr)
  50 {
  51     APBState *s = opaque;
  52     uint32_t val;
  53     int devfn;
  54
  55     devfn = (s->config_reg >> 8) & 0xFF;
  56     val = (1 << (devfn >> 3)) | ((devfn & 0x07) << 8) | (s->config_reg & 0xFC);
  57     return val;
  58 }
  59
  60 static CPUWriteMemoryFunc *pci_apb_config_write[] = {
  61     &pci_apb_config_writel,
  62     &pci_apb_config_writel,
  63     &pci_apb_config_writel,
  64 };
  65
  66 static CPUReadMemoryFunc *pci_apb_config_read[] = {
  67     &pci_apb_config_readl,
  68     &pci_apb_config_readl,
  69     &pci_apb_config_readl,
  70 };
  71
  72 static void apb_config_writel (void *opaque, target_phys_addr_t addr,
  73                                uint32_t val)
  74 {
  75     //PCIBus *s = opaque;
  76
  77     switch (addr & 0x3f) {
  78     case 0x00: // Control/Status
  79     case 0x10: // AFSR
  80     case 0x18: // AFAR
  81     case 0x20: // Diagnostic
  82     case 0x28: // Target address space
  83         // XXX
  84     default:
  85         break;
  86     }
  87 }
  88
  89 static uint32_t apb_config_readl (void *opaque,
  90                                   target_phys_addr_t addr)
  91 {
  92     //PCIBus *s = opaque;
  93     uint32_t val;
  94
  95     switch (addr & 0x3f) {
  96     case 0x00: // Control/Status
  97     case 0x10: // AFSR
  98     case 0x18: // AFAR
  99     case 0x20: // Diagnostic
 100     case 0x28: // Target address space
 101         // XXX
 102     default:
 103         val = 0;
 104         break;
 105     }
 106     return val;
 107 }
 108
 109 static CPUWriteMemoryFunc *apb_config_write[] = {
 110     &apb_config_writel,
 111     &apb_config_writel,
 112     &apb_config_writel,
 113 };
 114
 115 static CPUReadMemoryFunc *apb_config_read[] = {
 116     &apb_config_readl,
 117     &apb_config_readl,
 118     &apb_config_readl,
 119 };
 120
 121 static CPUWriteMemoryFunc *pci_apb_write[] = {
 122     &pci_host_data_writeb,
 123     &pci_host_data_writew,
 124     &pci_host_data_writel,
 125 };
 126
 127 static CPUReadMemoryFunc *pci_apb_read[] = {
 128     &pci_host_data_readb,
 129     &pci_host_data_readw,
 130     &pci_host_data_readl,
 131 };
 132
 133 static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
 134                                   uint32_t val)
 135 {
 136     cpu_outb(NULL, addr & 0xffff, val);
 137 }
 138
 139 static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
 140                                   uint32_t val)
 141 {
 142     cpu_outw(NULL, addr & 0xffff, val);
 143 }
 144
 145 static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
 146                                 uint32_t val)
 147 {
 148     cpu_outl(NULL, addr & 0xffff, val);
 149 }
 150
 151 static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
 152 {
 153     uint32_t val;
 154
 155     val = cpu_inb(NULL, addr & 0xffff);
 156     return val;
 157 }
 158
 159 static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
 160 {
 161     uint32_t val;
 162
 163     val = cpu_inw(NULL, addr & 0xffff);
 164     return val;
 165 }
 166
 167 static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
 168 {
 169     uint32_t val;
 170
 171     val = cpu_inl(NULL, addr & 0xffff);
 172     return val;
 173 }
 174
 175 static CPUWriteMemoryFunc *pci_apb_iowrite[] = {
 176     &pci_apb_iowriteb,
 177     &pci_apb_iowritew,
 178     &pci_apb_iowritel,
 179 };
 180
 181 static CPUReadMemoryFunc *pci_apb_ioread[] = {
 182     &pci_apb_ioreadb,
 183     &pci_apb_ioreadw,
 184     &pci_apb_ioreadl,
 185 };
 186
 187 /* The APB host has an IRQ line for each IRQ line of each slot.  */
 188 static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
 189 {
 190     return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
 191 }
 192
 193 static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
 194 {
 195     int bus_offset;
 196     if (pci_dev->devfn & 1)
 197         bus_offset = 16;
 198     else
 199         bus_offset = 0;
 200     return bus_offset + irq_num;
 201 }
 202
 203 static void pci_apb_set_irq(qemu_irq *pic, int irq_num, int level)
 204 {
 205     /* PCI IRQ map onto the first 32 INO.  */
 206     qemu_set_irq(pic[irq_num], level);
 207 }
 208
 209 PCIBus *pci_apb_init(target_phys_addr_t special_base,
 210                      target_phys_addr_t mem_base,
 211                      qemu_irq *pic)
 212 {
 213     APBState *s;
 214     PCIDevice *d;
 215     int pci_mem_config, pci_mem_data, apb_config, pci_ioport;
 216     PCIBus *secondary;
 217
 218     s = qemu_mallocz(sizeof(APBState));
 219     /* Ultrasparc PBM main bus */
 220     s->bus = pci_register_bus(pci_apb_set_irq, pci_pbm_map_irq, pic, 0, 32);
 221
 222     pci_mem_config = cpu_register_io_memory(0, pci_apb_config_read,
 223                                             pci_apb_config_write, s);
 224     apb_config = cpu_register_io_memory(0, apb_config_read,
 225                                         apb_config_write, s);
 226     pci_mem_data = cpu_register_io_memory(0, pci_apb_read,
 227                                           pci_apb_write, s);
 228     pci_ioport = cpu_register_io_memory(0, pci_apb_ioread,
 229                                           pci_apb_iowrite, s);
 230
 231     cpu_register_physical_memory(special_base + 0x2000ULL, 0x40, apb_config);
 232     cpu_register_physical_memory(special_base + 0x1000000ULL, 0x10, pci_mem_config);
 233     cpu_register_physical_memory(special_base + 0x2000000ULL, 0x10000, pci_ioport);
 234     cpu_register_physical_memory(mem_base, 0x10000000, pci_mem_data); // XXX size should be 4G-prom
 235
 236     d = pci_register_device(s->bus, "Advanced PCI Bus", sizeof(PCIDevice),
 237                             0, NULL, NULL);
 238     d->config[0x00] = 0x8e; // vendor_id : Sun
 239     d->config[0x01] = 0x10;
 240     d->config[0x02] = 0x00; // device_id
 241     d->config[0x03] = 0xa0;
 242     d->config[0x04] = 0x06; // command = bus master, pci mem
 243     d->config[0x05] = 0x00;
 244     d->config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
 245     d->config[0x07] = 0x03; // status = medium devsel
 246     d->config[0x08] = 0x00; // revision
 247     d->config[0x09] = 0x00; // programming i/f
 248     d->config[0x0A] = 0x00; // class_sub = pci host
 249     d->config[0x0B] = 0x06; // class_base = PCI_bridge
 250     d->config[0x0D] = 0x10; // latency_timer
 251     d->config[0x0E] = 0x00; // header_type
 252
 253     /* APB secondary busses */
 254     secondary = pci_bridge_init(s->bus, 8, 0x108e5000, pci_apb_map_irq, "Advanced PCI Bus secondary bridge 1");
 255     pci_bridge_init(s->bus, 9, 0x108e5000, pci_apb_map_irq, "Advanced PCI Bus secondary bridge 2");
 256     return secondary;
 257 }
 258
 259