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 "hw.h"
  30 #include "pci.h"
  31 typedef target_phys_addr_t pci_addr_t;
  32 #include "pci_host.h"
  33
  34 typedef PCIHostState APBState;
  35
  36 static void pci_apb_config_writel (void *opaque, target_phys_addr_t addr,
  37                                          uint32_t val)
  38 {
  39     APBState *s = opaque;
  40     int i;
  41
  42     for (i = 11; i < 32; i++) {
  43         if ((val & (1 << i)) != 0)
  44             break;
  45     }
  46     s->config_reg = (1 << 16) | (val & 0x7FC) | (i << 11);
  47 }
  48
  49 static uint32_t pci_apb_config_readl (void *opaque,
  50                                             target_phys_addr_t addr)
  51 {
  52     APBState *s = opaque;
  53     uint32_t val;
  54     int devfn;
  55
  56     devfn = (s->config_reg >> 8) & 0xFF;
  57     val = (1 << (devfn >> 3)) | ((devfn & 0x07) << 8) | (s->config_reg & 0xFC);
  58     return val;
  59 }
  60
  61 static CPUWriteMemoryFunc *pci_apb_config_write[] = {
  62     &pci_apb_config_writel,
  63     &pci_apb_config_writel,
  64     &pci_apb_config_writel,
  65 };
  66
  67 static CPUReadMemoryFunc *pci_apb_config_read[] = {
  68     &pci_apb_config_readl,
  69     &pci_apb_config_readl,
  70     &pci_apb_config_readl,
  71 };
  72
  73 static void apb_config_writel (void *opaque, target_phys_addr_t addr,
  74                                uint32_t val)
  75 {
  76     //PCIBus *s = opaque;
  77
  78     switch (addr & 0x3f) {
  79     case 0x00: // Control/Status
  80     case 0x10: // AFSR
  81     case 0x18: // AFAR
  82     case 0x20: // Diagnostic
  83     case 0x28: // Target address space
  84         // XXX
  85     default:
  86         break;
  87     }
  88 }
  89
  90 static uint32_t apb_config_readl (void *opaque,
  91                                   target_phys_addr_t addr)
  92 {
  93     //PCIBus *s = opaque;
  94     uint32_t val;
  95
  96     switch (addr & 0x3f) {
  97     case 0x00: // Control/Status
  98     case 0x10: // AFSR
  99     case 0x18: // AFAR
 100     case 0x20: // Diagnostic
 101     case 0x28: // Target address space
 102         // XXX
 103     default:
 104         val = 0;
 105         break;
 106     }
 107     return val;
 108 }
 109
 110 static CPUWriteMemoryFunc *apb_config_write[] = {
 111     &apb_config_writel,
 112     &apb_config_writel,
 113     &apb_config_writel,
 114 };
 115
 116 static CPUReadMemoryFunc *apb_config_read[] = {
 117     &apb_config_readl,
 118     &apb_config_readl,
 119     &apb_config_readl,
 120 };
 121
 122 static CPUWriteMemoryFunc *pci_apb_write[] = {
 123     &pci_host_data_writeb,
 124     &pci_host_data_writew,
 125     &pci_host_data_writel,
 126 };
 127
 128 static CPUReadMemoryFunc *pci_apb_read[] = {
 129     &pci_host_data_readb,
 130     &pci_host_data_readw,
 131     &pci_host_data_readl,
 132 };
 133
 134 static void pci_apb_iowriteb (void *opaque, target_phys_addr_t addr,
 135                                   uint32_t val)
 136 {
 137     cpu_outb(NULL, addr & 0xffff, val);
 138 }
 139
 140 static void pci_apb_iowritew (void *opaque, target_phys_addr_t addr,
 141                                   uint32_t val)
 142 {
 143     cpu_outw(NULL, addr & 0xffff, val);
 144 }
 145
 146 static void pci_apb_iowritel (void *opaque, target_phys_addr_t addr,
 147                                 uint32_t val)
 148 {
 149     cpu_outl(NULL, addr & 0xffff, val);
 150 }
 151
 152 static uint32_t pci_apb_ioreadb (void *opaque, target_phys_addr_t addr)
 153 {
 154     uint32_t val;
 155
 156     val = cpu_inb(NULL, addr & 0xffff);
 157     return val;
 158 }
 159
 160 static uint32_t pci_apb_ioreadw (void *opaque, target_phys_addr_t addr)
 161 {
 162     uint32_t val;
 163
 164     val = cpu_inw(NULL, addr & 0xffff);
 165     return val;
 166 }
 167
 168 static uint32_t pci_apb_ioreadl (void *opaque, target_phys_addr_t addr)
 169 {
 170     uint32_t val;
 171
 172     val = cpu_inl(NULL, addr & 0xffff);
 173     return val;
 174 }
 175
 176 static CPUWriteMemoryFunc *pci_apb_iowrite[] = {
 177     &pci_apb_iowriteb,
 178     &pci_apb_iowritew,
 179     &pci_apb_iowritel,
 180 };
 181
 182 static CPUReadMemoryFunc *pci_apb_ioread[] = {
 183     &pci_apb_ioreadb,
 184     &pci_apb_ioreadw,
 185     &pci_apb_ioreadl,
 186 };
 187
 188 /* The APB host has an IRQ line for each IRQ line of each slot.  */
 189 static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num)
 190 {
 191     return ((pci_dev->devfn & 0x18) >> 1) + irq_num;
 192 }
 193
 194 static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num)
 195 {
 196     int bus_offset;
 197     if (pci_dev->devfn & 1)
 198         bus_offset = 16;
 199     else
 200         bus_offset = 0;
 201     return bus_offset + irq_num;
 202 }
 203
 204 static void pci_apb_set_irq(qemu_irq *pic, int irq_num, int level)
 205 {
 206     /* PCI IRQ map onto the first 32 INO.  */
 207     qemu_set_irq(pic[irq_num], level);
 208 }
 209
 210 PCIBus *pci_apb_init(target_phys_addr_t special_base,
 211                      target_phys_addr_t mem_base,
 212                      qemu_irq *pic)
 213 {
 214     APBState *s;
 215     PCIDevice *d;
 216     int pci_mem_config, pci_mem_data, apb_config, pci_ioport;
 217     PCIBus *secondary;
 218
 219     s = qemu_mallocz(sizeof(APBState));
 220     /* Ultrasparc PBM main bus */
 221     s->bus = pci_register_bus(pci_apb_set_irq, pci_pbm_map_irq, pic, 0, 32);
 222
 223     pci_mem_config = cpu_register_io_memory(0, pci_apb_config_read,
 224                                             pci_apb_config_write, s);
 225     apb_config = cpu_register_io_memory(0, apb_config_read,
 226                                         apb_config_write, s);
 227     pci_mem_data = cpu_register_io_memory(0, pci_apb_read,
 228                                           pci_apb_write, s);
 229     pci_ioport = cpu_register_io_memory(0, pci_apb_ioread,
 230                                           pci_apb_iowrite, s);
 231
 232     cpu_register_physical_memory(special_base + 0x2000ULL, 0x40, apb_config);
 233     cpu_register_physical_memory(special_base + 0x1000000ULL, 0x10,
 234                                  pci_mem_config);
 235     cpu_register_physical_memory(special_base + 0x2000000ULL, 0x10000,
 236                                  pci_ioport);
 237     cpu_register_physical_memory(mem_base, 0x10000000,
 238                                  pci_mem_data); // XXX size should be 4G-prom
 239
 240     d = pci_register_device(s->bus, "Advanced PCI Bus", sizeof(PCIDevice),
 241                             0, NULL, NULL);
 242     d->config[0x00] = 0x8e; // vendor_id : Sun
 243     d->config[0x01] = 0x10;
 244     d->config[0x02] = 0x00; // device_id
 245     d->config[0x03] = 0xa0;
 246     d->config[0x04] = 0x06; // command = bus master, pci mem
 247     d->config[0x05] = 0x00;
 248     d->config[0x06] = 0xa0; // status = fast back-to-back, 66MHz, no error
 249     d->config[0x07] = 0x03; // status = medium devsel
 250     d->config[0x08] = 0x00; // revision
 251     d->config[0x09] = 0x00; // programming i/f
 252     d->config[0x0A] = 0x00; // class_sub = pci host
 253     d->config[0x0B] = 0x06; // class_base = PCI_bridge
 254     d->config[0x0D] = 0x10; // latency_timer
 255     d->config[0x0E] = 0x00; // header_type
 256
 257     /* APB secondary busses */
 258     secondary = pci_bridge_init(s->bus, 8, 0x108e5000, pci_apb_map_irq,
 259                                 "Advanced PCI Bus secondary bridge 1");
 260     pci_bridge_init(s->bus, 9, 0x108e5000, pci_apb_map_irq,
 261                     "Advanced PCI Bus secondary bridge 2");
 262     return secondary;
 263 }