hw/nios2/10m50_devboard.c

   1 /*
   2  * Altera 10M50 Nios2 GHRD
   3  *
   4  * Copyright (c) 2016 Marek Vasut <marek.vasut@gmail.com>
   5  *
   6  * Based on LabX device code
   7  *
   8  * Copyright (c) 2012 Chris Wulff <crwulff@gmail.com>
   9  *
  10  * This library is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation; either
  13  * version 2.1 of the License, or (at your option) any later version.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, see
  22  * <http://www.gnu.org/licenses/lgpl-2.1.html>
  23  */
  24
  25 #include "qemu/osdep.h"
  26 #include "qapi/error.h"
  27 #include "cpu.h"
  28
  29 #include "hw/sysbus.h"
  30 #include "hw/char/serial.h"
  31 #include "hw/qdev-properties.h"
  32 #include "sysemu/sysemu.h"
  33 #include "hw/boards.h"
  34 #include "exec/memory.h"
  35 #include "exec/address-spaces.h"
  36 #include "qemu/config-file.h"
  37
  38 #include "boot.h"
  39
  40 #define BINARY_DEVICE_TREE_FILE    "10m50-devboard.dtb"
  41
  42 static void nios2_10m50_ghrd_init(MachineState *machine)
  43 {
  44     Nios2CPU *cpu;
  45     DeviceState *dev;
  46     MemoryRegion *address_space_mem = get_system_memory();
  47     MemoryRegion *phys_tcm = g_new(MemoryRegion, 1);
  48     MemoryRegion *phys_tcm_alias = g_new(MemoryRegion, 1);
  49     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
  50     MemoryRegion *phys_ram_alias = g_new(MemoryRegion, 1);
  51     ram_addr_t tcm_base = 0x0;
  52     ram_addr_t tcm_size = 0x1000;    /* 1 kiB, but QEMU limit is 4 kiB */
  53     ram_addr_t ram_base = 0x08000000;
  54     ram_addr_t ram_size = 0x08000000;
  55     qemu_irq irq[32];
  56     int i;
  57
  58     /* Physical TCM (tb_ram_1k) with alias at 0xc0000000 */
  59     memory_region_init_ram(phys_tcm, NULL, "nios2.tcm", tcm_size,
  60                            &error_abort);
  61     memory_region_init_alias(phys_tcm_alias, NULL, "nios2.tcm.alias",
  62                              phys_tcm, 0, tcm_size);
  63     memory_region_add_subregion(address_space_mem, tcm_base, phys_tcm);
  64     memory_region_add_subregion(address_space_mem, 0xc0000000 + tcm_base,
  65                                 phys_tcm_alias);
  66
  67     /* Physical DRAM with alias at 0xc0000000 */
  68     memory_region_init_ram(phys_ram, NULL, "nios2.ram", ram_size,
  69                            &error_abort);
  70     memory_region_init_alias(phys_ram_alias, NULL, "nios2.ram.alias",
  71                              phys_ram, 0, ram_size);
  72     memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
  73     memory_region_add_subregion(address_space_mem, 0xc0000000 + ram_base,
  74                                 phys_ram_alias);
  75
  76     /* Create CPU -- FIXME */
  77     cpu = NIOS2_CPU(cpu_create(TYPE_NIOS2_CPU));
  78     for (i = 0; i < 32; i++) {
  79         irq[i] = qdev_get_gpio_in_named(DEVICE(cpu), "IRQ", i);
  80     }
  81
  82     /* Register: Altera 16550 UART */
  83     serial_mm_init(address_space_mem, 0xf8001600, 2, irq[1], 115200,
  84                    serial_hd(0), DEVICE_NATIVE_ENDIAN);
  85
  86     /* Register: Timer sys_clk_timer  */
  87     dev = qdev_new("ALTR.timer");
  88     qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
  89     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  90     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xf8001440);
  91     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[0]);
  92
  93     /* Register: Timer sys_clk_timer_1  */
  94     dev = qdev_new("ALTR.timer");
  95     qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
  96     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  97     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xe0000880);
  98     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[5]);
  99
 100     /* Configure new exception vectors and reset CPU for it to take effect. */
 101     cpu->reset_addr = 0xd4000000;
 102     cpu->exception_addr = 0xc8000120;
 103     cpu->fast_tlb_miss_addr = 0xc0000100;
 104
 105     nios2_load_kernel(cpu, ram_base, ram_size, machine->initrd_filename,
 106                       BINARY_DEVICE_TREE_FILE, NULL);
 107 }
 108
 109 static void nios2_10m50_ghrd_machine_init(struct MachineClass *mc)
 110 {
 111     mc->desc = "Altera 10M50 GHRD Nios II design";
 112     mc->init = nios2_10m50_ghrd_init;
 113     mc->is_default = true;
 114 }
 115
 116 DEFINE_MACHINE("10m50-ghrd", nios2_10m50_ghrd_machine_init);