hw/arm/msf2-som.c

   1 /*
   2  * SmartFusion2 SOM starter kit(from Emcraft) emulation.
   3  *
   4  * M2S-FG484 SOM hardware architecture specification:
   5  *   https://www.emcraft.com/jdownloads/som/m2s/m2s-som-ha.pdf
   6  *
   7  * Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.com>
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a copy
  10  * of this software and associated documentation files (the "Software"), to deal
  11  * in the Software without restriction, including without limitation the rights
  12  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  13  * copies of the Software, and to permit persons to whom the Software is
  14  * furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included in
  17  * all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  22  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  23  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  24  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  25  * THE SOFTWARE.
  26  */
  27
  28 #include "qemu/osdep.h"
  29 #include "qemu/units.h"
  30 #include "qapi/error.h"
  31 #include "qemu/error-report.h"
  32 #include "hw/boards.h"
  33 #include "hw/qdev-properties.h"
  34 #include "hw/arm/boot.h"
  35 #include "hw/qdev-clock.h"
  36 #include "exec/address-spaces.h"
  37 #include "hw/arm/msf2-soc.h"
  38
  39 #define DDR_BASE_ADDRESS      0xA0000000
  40 #define DDR_SIZE              (64 * MiB)
  41
  42 #define M2S010_ENVM_SIZE      (256 * KiB)
  43 #define M2S010_ESRAM_SIZE     (64 * KiB)
  44
  45 static void emcraft_sf2_s2s010_init(MachineState *machine)
  46 {
  47     DeviceState *dev;
  48     DeviceState *spi_flash;
  49     MSF2State *soc;
  50     MachineClass *mc = MACHINE_GET_CLASS(machine);
  51     DriveInfo *dinfo = drive_get(IF_MTD, 0, 0);
  52     qemu_irq cs_line;
  53     BusState *spi_bus;
  54     MemoryRegion *sysmem = get_system_memory();
  55     MemoryRegion *ddr = g_new(MemoryRegion, 1);
  56     Clock *m3clk;
  57
  58     if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
  59         error_report("This board can only be used with CPU %s",
  60                      mc->default_cpu_type);
  61         exit(1);
  62     }
  63
  64     memory_region_init_ram(ddr, NULL, "ddr-ram", DDR_SIZE,
  65                            &error_fatal);
  66     memory_region_add_subregion(sysmem, DDR_BASE_ADDRESS, ddr);
  67
  68     dev = qdev_new(TYPE_MSF2_SOC);
  69     qdev_prop_set_string(dev, "part-name", "M2S010");
  70     qdev_prop_set_string(dev, "cpu-type", mc->default_cpu_type);
  71
  72     qdev_prop_set_uint64(dev, "eNVM-size", M2S010_ENVM_SIZE);
  73     qdev_prop_set_uint64(dev, "eSRAM-size", M2S010_ESRAM_SIZE);
  74
  75     /*
  76      * CPU clock and peripheral clocks(APB0, APB1)are configurable
  77      * in Libero. CPU clock is divided by APB0 and APB1 divisors for
  78      * peripherals. Emcraft's SoM kit comes with these settings by default.
  79      */
  80     /* This clock doesn't need migration because it is fixed-frequency */
  81     m3clk = clock_new(OBJECT(machine), "m3clk");
  82     clock_set_hz(m3clk, 142 * 1000000);
  83     qdev_connect_clock_in(dev, "m3clk", m3clk);
  84     qdev_prop_set_uint32(dev, "apb0div", 2);
  85     qdev_prop_set_uint32(dev, "apb1div", 2);
  86
  87     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
  88
  89     soc = MSF2_SOC(dev);
  90
  91     /* Attach SPI flash to SPI0 controller */
  92     spi_bus = qdev_get_child_bus(dev, "spi0");
  93     spi_flash = qdev_new("s25sl12801"); /* Spansion S25FL128SDPBHICO */
  94     qdev_prop_set_uint8(spi_flash, "spansion-cr2nv", 1);
  95     if (dinfo) {
  96         qdev_prop_set_drive_err(spi_flash, "drive",
  97                                 blk_by_legacy_dinfo(dinfo), &error_fatal);
  98     }
  99     qdev_realize_and_unref(spi_flash, spi_bus, &error_fatal);
 100     cs_line = qdev_get_gpio_in_named(spi_flash, SSI_GPIO_CS, 0);
 101     sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
 102
 103     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
 104                        0, soc->envm_size);
 105 }
 106
 107 static void emcraft_sf2_machine_init(MachineClass *mc)
 108 {
 109     mc->desc = "SmartFusion2 SOM kit from Emcraft (M2S010)";
 110     mc->init = emcraft_sf2_s2s010_init;
 111     mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
 112 }
 113
 114 DEFINE_MACHINE("emcraft-sf2", emcraft_sf2_machine_init)