hw/grackle_pci.c

   1 /*
   2  * QEMU Grackle (heathrow PPC) 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 #include "vl.h"
  26 typedef target_phys_addr_t pci_addr_t;
  27 #include "pci_host.h"
  28
  29 typedef PCIHostState GrackleState;
  30
  31 static void pci_grackle_config_writel (void *opaque, target_phys_addr_t addr,
  32                                        uint32_t val)
  33 {
  34     GrackleState *s = opaque;
  35 #ifdef TARGET_WORDS_BIGENDIAN
  36     val = bswap32(val);
  37 #endif
  38     s->config_reg = val;
  39 }
  40
  41 static uint32_t pci_grackle_config_readl (void *opaque, target_phys_addr_t addr)
  42 {
  43     GrackleState *s = opaque;
  44     uint32_t val;
  45
  46     val = s->config_reg;
  47 #ifdef TARGET_WORDS_BIGENDIAN
  48     val = bswap32(val);
  49 #endif
  50     return val;
  51 }
  52
  53 static CPUWriteMemoryFunc *pci_grackle_config_write[] = {
  54     &pci_grackle_config_writel,
  55     &pci_grackle_config_writel,
  56     &pci_grackle_config_writel,
  57 };
  58
  59 static CPUReadMemoryFunc *pci_grackle_config_read[] = {
  60     &pci_grackle_config_readl,
  61     &pci_grackle_config_readl,
  62     &pci_grackle_config_readl,
  63 };
  64
  65 static CPUWriteMemoryFunc *pci_grackle_write[] = {
  66     &pci_host_data_writeb,
  67     &pci_host_data_writew,
  68     &pci_host_data_writel,
  69 };
  70
  71 static CPUReadMemoryFunc *pci_grackle_read[] = {
  72     &pci_host_data_readb,
  73     &pci_host_data_readw,
  74     &pci_host_data_readl,
  75 };
  76
  77 /* Don't know if this matches real hardware, but it agrees with OHW.  */
  78 static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
  79 {
  80     return (irq_num + (pci_dev->devfn >> 3)) & 3;
  81 }
  82
  83 static void pci_grackle_set_irq(qemu_irq *pic, int irq_num, int level)
  84 {
  85     qemu_set_irq(pic[irq_num + 8], level);
  86 }
  87
  88 PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic)
  89 {
  90     GrackleState *s;
  91     PCIDevice *d;
  92     int pci_mem_config, pci_mem_data;
  93
  94     s = qemu_mallocz(sizeof(GrackleState));
  95     s->bus = pci_register_bus(pci_grackle_set_irq, pci_grackle_map_irq,
  96                               pic, 0, 0);
  97
  98     pci_mem_config = cpu_register_io_memory(0, pci_grackle_config_read,
  99                                             pci_grackle_config_write, s);
 100     pci_mem_data = cpu_register_io_memory(0, pci_grackle_read,
 101                                           pci_grackle_write, s);
 102     cpu_register_physical_memory(base, 0x1000, pci_mem_config);
 103     cpu_register_physical_memory(base + 0x00200000, 0x1000, pci_mem_data);
 104     d = pci_register_device(s->bus, "Grackle host bridge", sizeof(PCIDevice),
 105                             0, NULL, NULL);
 106     d->config[0x00] = 0x57; // vendor_id
 107     d->config[0x01] = 0x10;
 108     d->config[0x02] = 0x02; // device_id
 109     d->config[0x03] = 0x00;
 110     d->config[0x08] = 0x00; // revision
 111     d->config[0x09] = 0x01;
 112     d->config[0x0a] = 0x00; // class_sub = host
 113     d->config[0x0b] = 0x06; // class_base = PCI_bridge
 114     d->config[0x0e] = 0x00; // header_type
 115
 116     d->config[0x18] = 0x00;  // primary_bus
 117     d->config[0x19] = 0x01;  // secondary_bus
 118     d->config[0x1a] = 0x00;  // subordinate_bus
 119     d->config[0x1c] = 0x00;
 120     d->config[0x1d] = 0x00;
 121
 122     d->config[0x20] = 0x00; // memory_base
 123     d->config[0x21] = 0x00;
 124     d->config[0x22] = 0x01; // memory_limit
 125     d->config[0x23] = 0x00;
 126
 127     d->config[0x24] = 0x00; // prefetchable_memory_base
 128     d->config[0x25] = 0x00;
 129     d->config[0x26] = 0x00; // prefetchable_memory_limit
 130     d->config[0x27] = 0x00;
 131
 132 #if 0
 133     /* PCI2PCI bridge same values as PearPC - check this */
 134     d->config[0x00] = 0x11; // vendor_id
 135     d->config[0x01] = 0x10;
 136     d->config[0x02] = 0x26; // device_id
 137     d->config[0x03] = 0x00;
 138     d->config[0x08] = 0x02; // revision
 139     d->config[0x0a] = 0x04; // class_sub = pci2pci
 140     d->config[0x0b] = 0x06; // class_base = PCI_bridge
 141     d->config[0x0e] = 0x01; // header_type
 142
 143     d->config[0x18] = 0x0;  // primary_bus
 144     d->config[0x19] = 0x1;  // secondary_bus
 145     d->config[0x1a] = 0x1;  // subordinate_bus
 146     d->config[0x1c] = 0x10; // io_base
 147     d->config[0x1d] = 0x20; // io_limit
 148
 149     d->config[0x20] = 0x80; // memory_base
 150     d->config[0x21] = 0x80;
 151     d->config[0x22] = 0x90; // memory_limit
 152     d->config[0x23] = 0x80;
 153
 154     d->config[0x24] = 0x00; // prefetchable_memory_base
 155     d->config[0x25] = 0x84;
 156     d->config[0x26] = 0x00; // prefetchable_memory_limit
 157     d->config[0x27] = 0x85;
 158 #endif
 159     return s->bus;
 160 }
 161