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 "qemu-common.h"
  28 #include "cpu.h"
  29
  30 #include "hw/sysbus.h"
  31 #include "hw/hw.h"
  32 #include "hw/char/serial.h"
  33 #include "sysemu/sysemu.h"
  34 #include "hw/boards.h"
  35 #include "exec/memory.h"
  36 #include "exec/address-spaces.h"
  37 #include "qemu/config-file.h"
  38
  39 #include "boot.h"
  40
  41 #define BINARY_DEVICE_TREE_FILE    "10m50-devboard.dtb"
  42
  43 static void nios2_10m50_ghrd_init(MachineState *machine)
  44 {
  45     Nios2CPU *cpu;
  46     DeviceState *dev;
  47     MemoryRegion *address_space_mem = get_system_memory();
  48     MemoryRegion *phys_tcm = g_new(MemoryRegion, 1);
  49     MemoryRegion *phys_tcm_alias = g_new(MemoryRegion, 1);
  50     MemoryRegion *phys_ram = g_new(MemoryRegion, 1);
  51     MemoryRegion *phys_ram_alias = g_new(MemoryRegion, 1);
  52     ram_addr_t tcm_base = 0x0;
  53     ram_addr_t tcm_size = 0x1000;    /* 1 kiB, but QEMU limit is 4 kiB */
  54     ram_addr_t ram_base = 0x08000000;
  55     ram_addr_t ram_size = 0x08000000;
  56     qemu_irq *cpu_irq, irq[32];
  57     int i;
  58
  59     /* Physical TCM (tb_ram_1k) with alias at 0xc0000000 */
  60     memory_region_init_ram(phys_tcm, NULL, "nios2.tcm", tcm_size,
  61                            &error_abort);
  62     memory_region_init_alias(phys_tcm_alias, NULL, "nios2.tcm.alias",
  63                              phys_tcm, 0, tcm_size);
  64     memory_region_add_subregion(address_space_mem, tcm_base, phys_tcm);
  65     memory_region_add_subregion(address_space_mem, 0xc0000000 + tcm_base,
  66                                 phys_tcm_alias);
  67
  68     /* Physical DRAM with alias at 0xc0000000 */
  69     memory_region_init_ram(phys_ram, NULL, "nios2.ram", ram_size,
  70                            &error_abort);
  71     memory_region_init_alias(phys_ram_alias, NULL, "nios2.ram.alias",
  72                              phys_ram, 0, ram_size);
  73     memory_region_add_subregion(address_space_mem, ram_base, phys_ram);
  74     memory_region_add_subregion(address_space_mem, 0xc0000000 + ram_base,
  75                                 phys_ram_alias);
  76
  77     /* Create CPU -- FIXME */
  78     cpu = NIOS2_CPU(cpu_generic_init(TYPE_NIOS2_CPU, "nios2"));
  79
  80     /* Register: CPU interrupt controller (PIC) */
  81     cpu_irq = nios2_cpu_pic_init(cpu);
  82
  83     /* Register: Internal Interrupt Controller (IIC) */
  84     dev = qdev_create(NULL, "altera,iic");
  85     object_property_add_const_link(OBJECT(dev), "cpu", OBJECT(cpu),
  86                                    &error_abort);
  87     qdev_init_nofail(dev);
  88     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, cpu_irq[0]);
  89     for (i = 0; i < 32; i++) {
  90         irq[i] = qdev_get_gpio_in(dev, i);
  91     }
  92
  93     /* Register: Altera 16550 UART */
  94     serial_mm_init(address_space_mem, 0xf8001600, 2, irq[1], 115200,
  95                    serial_hds[0], DEVICE_NATIVE_ENDIAN);
  96
  97     /* Register: Timer sys_clk_timer  */
  98     dev = qdev_create(NULL, "ALTR.timer");
  99     qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
 100     qdev_init_nofail(dev);
 101     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xf8001440);
 102     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[0]);
 103
 104     /* Register: Timer sys_clk_timer_1  */
 105     dev = qdev_create(NULL, "ALTR.timer");
 106     qdev_prop_set_uint32(dev, "clock-frequency", 75 * 1000000);
 107     qdev_init_nofail(dev);
 108     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, 0xe0000880);
 109     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[5]);
 110
 111     /* Configure new exception vectors and reset CPU for it to take effect. */
 112     cpu->reset_addr = 0xd4000000;
 113     cpu->exception_addr = 0xc8000120;
 114     cpu->fast_tlb_miss_addr = 0xc0000100;
 115
 116     nios2_load_kernel(cpu, ram_base, ram_size, machine->initrd_filename,
 117                       BINARY_DEVICE_TREE_FILE, NULL);
 118 }
 119
 120 static void nios2_10m50_ghrd_machine_init(struct MachineClass *mc)
 121 {
 122     mc->desc = "Altera 10M50 GHRD Nios II design";
 123     mc->init = nios2_10m50_ghrd_init;
 124     mc->is_default = 1;
 125 }
 126
 127 DEFINE_MACHINE("10m50-ghrd", nios2_10m50_ghrd_machine_init);