hw/grackle_pci.c

   1 /*
   2  * QEMU Grackle PCI host (heathrow OldWorld PowerMac)
   3  *
   4  * Copyright (c) 2006-2007 Fabrice Bellard
   5  * Copyright (c) 2007 Jocelyn Mayer
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "vl.h"
  27 #include "ppc_mac.h"
  28 typedef target_phys_addr_t pci_addr_t;
  29 #include "pci_host.h"
  30
  31 typedef PCIHostState GrackleState;
  32
  33 static void pci_grackle_config_writel (void *opaque, target_phys_addr_t addr,
  34                                        uint32_t val)
  35 {
  36     GrackleState *s = opaque;
  37 #ifdef TARGET_WORDS_BIGENDIAN
  38     val = bswap32(val);
  39 #endif
  40     s->config_reg = val;
  41 }
  42
  43 static uint32_t pci_grackle_config_readl (void *opaque, target_phys_addr_t addr)
  44 {
  45     GrackleState *s = opaque;
  46     uint32_t val;
  47
  48     val = s->config_reg;
  49 #ifdef TARGET_WORDS_BIGENDIAN
  50     val = bswap32(val);
  51 #endif
  52     return val;
  53 }
  54
  55 static CPUWriteMemoryFunc *pci_grackle_config_write[] = {
  56     &pci_grackle_config_writel,
  57     &pci_grackle_config_writel,
  58     &pci_grackle_config_writel,
  59 };
  60
  61 static CPUReadMemoryFunc *pci_grackle_config_read[] = {
  62     &pci_grackle_config_readl,
  63     &pci_grackle_config_readl,
  64     &pci_grackle_config_readl,
  65 };
  66
  67 static CPUWriteMemoryFunc *pci_grackle_write[] = {
  68     &pci_host_data_writeb,
  69     &pci_host_data_writew,
  70     &pci_host_data_writel,
  71 };
  72
  73 static CPUReadMemoryFunc *pci_grackle_read[] = {
  74     &pci_host_data_readb,
  75     &pci_host_data_readw,
  76     &pci_host_data_readl,
  77 };
  78
  79 /* Don't know if this matches real hardware, but it agrees with OHW.  */
  80 static int pci_grackle_map_irq(PCIDevice *pci_dev, int irq_num)
  81 {
  82     return (irq_num + (pci_dev->devfn >> 3)) & 3;
  83 }
  84
  85 static void pci_grackle_set_irq(qemu_irq *pic, int irq_num, int level)
  86 {
  87     qemu_set_irq(pic[irq_num + 0x15], level);
  88 }
  89
  90 PCIBus *pci_grackle_init(uint32_t base, qemu_irq *pic)
  91 {
  92     GrackleState *s;
  93     PCIDevice *d;
  94     int pci_mem_config, pci_mem_data;
  95
  96     s = qemu_mallocz(sizeof(GrackleState));
  97     s->bus = pci_register_bus(pci_grackle_set_irq, pci_grackle_map_irq,
  98                               pic, 0, 4);
  99
 100     pci_mem_config = cpu_register_io_memory(0, pci_grackle_config_read,
 101                                             pci_grackle_config_write, s);
 102     pci_mem_data = cpu_register_io_memory(0, pci_grackle_read,
 103                                           pci_grackle_write, s);
 104     cpu_register_physical_memory(base, 0x1000, pci_mem_config);
 105     cpu_register_physical_memory(base + 0x00200000, 0x1000, pci_mem_data);
 106     d = pci_register_device(s->bus, "Grackle host bridge", sizeof(PCIDevice),
 107                             0, NULL, NULL);
 108     d->config[0x00] = 0x57; // vendor_id
 109     d->config[0x01] = 0x10;
 110     d->config[0x02] = 0x02; // device_id
 111     d->config[0x03] = 0x00;
 112     d->config[0x08] = 0x00; // revision
 113     d->config[0x09] = 0x01;
 114     d->config[0x0a] = 0x00; // class_sub = host
 115     d->config[0x0b] = 0x06; // class_base = PCI_bridge
 116     d->config[0x0e] = 0x00; // header_type
 117
 118 #if 0
 119     /* PCI2PCI bridge same values as PearPC - check this */
 120     d->config[0x00] = 0x11; // vendor_id
 121     d->config[0x01] = 0x10;
 122     d->config[0x02] = 0x26; // device_id
 123     d->config[0x03] = 0x00;
 124     d->config[0x08] = 0x02; // revision
 125     d->config[0x0a] = 0x04; // class_sub = pci2pci
 126     d->config[0x0b] = 0x06; // class_base = PCI_bridge
 127     d->config[0x0e] = 0x01; // header_type
 128
 129     d->config[0x18] = 0x0;  // primary_bus
 130     d->config[0x19] = 0x1;  // secondary_bus
 131     d->config[0x1a] = 0x1;  // subordinate_bus
 132     d->config[0x1c] = 0x10; // io_base
 133     d->config[0x1d] = 0x20; // io_limit
 134
 135     d->config[0x20] = 0x80; // memory_base
 136     d->config[0x21] = 0x80;
 137     d->config[0x22] = 0x90; // memory_limit
 138     d->config[0x23] = 0x80;
 139
 140     d->config[0x24] = 0x00; // prefetchable_memory_base
 141     d->config[0x25] = 0x84;
 142     d->config[0x26] = 0x00; // prefetchable_memory_limit
 143     d->config[0x27] = 0x85;
 144 #endif
 145     return s->bus;
 146 }
 147