hw/xtensa/virt.c

   1 /*
   2  * Copyright (c) 2019, Max Filippov, Open Source and Linux Lab.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are met:
   7  *     * Redistributions of source code must retain the above copyright
   8  *       notice, this list of conditions and the following disclaimer.
   9  *     * Redistributions in binary form must reproduce the above copyright
  10  *       notice, this list of conditions and the following disclaimer in the
  11  *       documentation and/or other materials provided with the distribution.
  12  *     * Neither the name of the Open Source and Linux Lab nor the
  13  *       names of its contributors may be used to endorse or promote products
  14  *       derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  20  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  23  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  25  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "qemu/osdep.h"
  29 #include "qapi/error.h"
  30 #include "sysemu/reset.h"
  31 #include "hw/boards.h"
  32 #include "hw/loader.h"
  33 #include "hw/pci-host/gpex.h"
  34 #include "net/net.h"
  35 #include "elf.h"
  36 #include "exec/memory.h"
  37 #include "qemu/error-report.h"
  38 #include "xtensa_memory.h"
  39 #include "xtensa_sim.h"
  40
  41 static void create_pcie(MachineState *ms, CPUXtensaState *env, int irq_base,
  42                         hwaddr addr_base)
  43 {
  44     hwaddr base_ecam = addr_base + 0x00100000;
  45     hwaddr size_ecam =             0x03f00000;
  46     hwaddr base_pio  = addr_base + 0x00000000;
  47     hwaddr size_pio  =             0x00010000;
  48     hwaddr base_mmio = addr_base + 0x04000000;
  49     hwaddr size_mmio =             0x08000000;
  50
  51     MemoryRegion *ecam_alias;
  52     MemoryRegion *ecam_reg;
  53     MemoryRegion *pio_alias;
  54     MemoryRegion *pio_reg;
  55     MemoryRegion *mmio_alias;
  56     MemoryRegion *mmio_reg;
  57
  58     MachineClass *mc = MACHINE_GET_CLASS(ms);
  59     DeviceState *dev;
  60     PCIHostState *pci;
  61     qemu_irq *extints;
  62     int i;
  63
  64     dev = qdev_new(TYPE_GPEX_HOST);
  65     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  66
  67     /* Map only the first size_ecam bytes of ECAM space. */
  68     ecam_alias = g_new0(MemoryRegion, 1);
  69     ecam_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0);
  70     memory_region_init_alias(ecam_alias, OBJECT(dev), "pcie-ecam",
  71                              ecam_reg, 0, size_ecam);
  72     memory_region_add_subregion(get_system_memory(), base_ecam, ecam_alias);
  73
  74     /*
  75      * Map the MMIO window into system address space so as to expose
  76      * the section of PCI MMIO space which starts at the same base address
  77      * (ie 1:1 mapping for that part of PCI MMIO space visible through
  78      * the window).
  79      */
  80     mmio_alias = g_new0(MemoryRegion, 1);
  81     mmio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 1);
  82     memory_region_init_alias(mmio_alias, OBJECT(dev), "pcie-mmio",
  83                              mmio_reg, base_mmio, size_mmio);
  84     memory_region_add_subregion(get_system_memory(), base_mmio, mmio_alias);
  85
  86     /* Map IO port space. */
  87     pio_alias = g_new0(MemoryRegion, 1);
  88     pio_reg = sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 2);
  89     memory_region_init_alias(pio_alias, OBJECT(dev), "pcie-pio",
  90                              pio_reg, 0, size_pio);
  91     memory_region_add_subregion(get_system_memory(), base_pio, pio_alias);
  92
  93     /* Connect IRQ lines. */
  94     extints = xtensa_get_extints(env);
  95
  96     for (i = 0; i < GPEX_NUM_IRQS; i++) {
  97         void *q = extints[irq_base + i];
  98
  99         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, q);
 100         gpex_set_irq_num(GPEX_HOST(dev), i, irq_base + i);
 101     }
 102
 103     pci = PCI_HOST_BRIDGE(dev);
 104     if (pci->bus) {
 105         pci_init_nic_devices(pci->bus, mc->default_nic);
 106     }
 107 }
 108
 109 static void xtensa_virt_init(MachineState *machine)
 110 {
 111     XtensaCPU *cpu = xtensa_sim_common_init(machine);
 112     CPUXtensaState *env = &cpu->env;
 113
 114     create_pcie(machine, env, 0, 0xf0000000);
 115     xtensa_sim_load_kernel(cpu, machine);
 116 }
 117
 118 static void xtensa_virt_machine_init(MachineClass *mc)
 119 {
 120     mc->desc = "virt machine (" XTENSA_DEFAULT_CPU_MODEL ")";
 121     mc->init = xtensa_virt_init;
 122     mc->max_cpus = 32;
 123     mc->default_cpu_type = XTENSA_DEFAULT_CPU_TYPE;
 124     mc->default_nic = "virtio-net-pci";
 125 }
 126
 127 DEFINE_MACHINE("virt", xtensa_virt_machine_init)