hw/versatile_pci.c

   1 /*
   2  * ARM Versatile/PB PCI host controller
   3  *
   4  * Copyright (c) 2006 CodeSourcery.
   5  * Written by Paul Brook
   6  *
   7  * This code is licenced under the LGPL.
   8  */
   9
  10 #include "hw.h"
  11 #include "pci.h"
  12 #include "primecell.h"
  13
  14 static inline uint32_t vpb_pci_config_addr(target_phys_addr_t addr)
  15 {
  16     return addr & 0xffffff;
  17 }
  18
  19 static void pci_vpb_config_writeb (void *opaque, target_phys_addr_t addr,
  20                                    uint32_t val)
  21 {
  22     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 1);
  23 }
  24
  25 static void pci_vpb_config_writew (void *opaque, target_phys_addr_t addr,
  26                                    uint32_t val)
  27 {
  28 #ifdef TARGET_WORDS_BIGENDIAN
  29     val = bswap16(val);
  30 #endif
  31     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 2);
  32 }
  33
  34 static void pci_vpb_config_writel (void *opaque, target_phys_addr_t addr,
  35                                    uint32_t val)
  36 {
  37 #ifdef TARGET_WORDS_BIGENDIAN
  38     val = bswap32(val);
  39 #endif
  40     pci_data_write(opaque, vpb_pci_config_addr (addr), val, 4);
  41 }
  42
  43 static uint32_t pci_vpb_config_readb (void *opaque, target_phys_addr_t addr)
  44 {
  45     uint32_t val;
  46     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 1);
  47     return val;
  48 }
  49
  50 static uint32_t pci_vpb_config_readw (void *opaque, target_phys_addr_t addr)
  51 {
  52     uint32_t val;
  53     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 2);
  54 #ifdef TARGET_WORDS_BIGENDIAN
  55     val = bswap16(val);
  56 #endif
  57     return val;
  58 }
  59
  60 static uint32_t pci_vpb_config_readl (void *opaque, target_phys_addr_t addr)
  61 {
  62     uint32_t val;
  63     val = pci_data_read(opaque, vpb_pci_config_addr (addr), 4);
  64 #ifdef TARGET_WORDS_BIGENDIAN
  65     val = bswap32(val);
  66 #endif
  67     return val;
  68 }
  69
  70 static CPUWriteMemoryFunc *pci_vpb_config_write[] = {
  71     &pci_vpb_config_writeb,
  72     &pci_vpb_config_writew,
  73     &pci_vpb_config_writel,
  74 };
  75
  76 static CPUReadMemoryFunc *pci_vpb_config_read[] = {
  77     &pci_vpb_config_readb,
  78     &pci_vpb_config_readw,
  79     &pci_vpb_config_readl,
  80 };
  81
  82 static int pci_vpb_map_irq(PCIDevice *d, int irq_num)
  83 {
  84     return irq_num;
  85 }
  86
  87 static void pci_vpb_set_irq(qemu_irq *pic, int irq_num, int level)
  88 {
  89     qemu_set_irq(pic[irq_num], level);
  90 }
  91
  92 PCIBus *pci_vpb_init(qemu_irq *pic, int realview)
  93 {
  94     PCIBus *s;
  95     PCIDevice *d;
  96     int mem_config;
  97     uint32_t base;
  98     const char * name;
  99     qemu_irq *irqs;
 100     int i;
 101
 102     irqs = qemu_mallocz(sizeof(qemu_irq) * 4);
 103     for (i = 0; i < 4; i++) {
 104         irqs[i] = pic[i];
 105     }
 106     if (realview) {
 107         base = 0x60000000;
 108         name = "RealView EB PCI Controller";
 109     } else {
 110         base = 0x40000000;
 111         name = "Versatile/PB PCI Controller";
 112     }
 113     s = pci_register_bus(pci_vpb_set_irq, pci_vpb_map_irq, irqs, 11 << 3, 4);
 114     /* ??? Register memory space.  */
 115
 116     mem_config = cpu_register_io_memory(0, pci_vpb_config_read,
 117                                         pci_vpb_config_write, s);
 118     /* Selfconfig area.  */
 119     cpu_register_physical_memory(base + 0x01000000, 0x1000000, mem_config);
 120     /* Normal config area.  */
 121     cpu_register_physical_memory(base + 0x02000000, 0x1000000, mem_config);
 122
 123     d = pci_register_device(s, name, sizeof(PCIDevice), -1, NULL, NULL);
 124
 125     if (realview) {
 126         /* IO memory area.  */
 127         isa_mmio_init(base + 0x03000000, 0x00100000);
 128     }
 129
 130     pci_config_set_vendor_id(d->config, PCI_VENDOR_ID_XILINX);
 131     /* Both boards have the same device ID.  Oh well.  */
 132     pci_config_set_device_id(d->config, PCI_DEVICE_ID_XILINX_XC2VP30);
 133     d->config[0x04] = 0x00;
 134     d->config[0x05] = 0x00;
 135     d->config[0x06] = 0x20;
 136     d->config[0x07] = 0x02;
 137     d->config[0x08] = 0x00; // revision
 138     d->config[0x09] = 0x00; // programming i/f
 139     pci_config_set_class(d->config, PCI_CLASS_PROCESSOR_CO);
 140     d->config[0x0D] = 0x10; // latency_timer
 141
 142     return s;
 143 }