hw/rx/rx-gdbsim.c

   1 /*
   2  * RX QEMU GDB simulator
   3  *
   4  * Copyright (c) 2019 Yoshinori Sato
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2 or later, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along with
  16  * this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "qemu/osdep.h"
  20 #include "qemu/cutils.h"
  21 #include "qemu/error-report.h"
  22 #include "qapi/error.h"
  23 #include "qemu-common.h"
  24 #include "cpu.h"
  25 #include "hw/hw.h"
  26 #include "hw/sysbus.h"
  27 #include "hw/loader.h"
  28 #include "hw/rx/rx62n.h"
  29 #include "sysemu/sysemu.h"
  30 #include "sysemu/qtest.h"
  31 #include "sysemu/device_tree.h"
  32 #include "hw/boards.h"
  33
  34 /* Same address of GDB integrated simulator */
  35 #define SDRAM_BASE  EXT_CS_BASE
  36
  37 typedef struct RxGdbSimMachineClass {
  38     /*< private >*/
  39     MachineClass parent_class;
  40     /*< public >*/
  41     const char *mcu_name;
  42     uint32_t xtal_freq_hz;
  43 } RxGdbSimMachineClass;
  44
  45 typedef struct RxGdbSimMachineState {
  46     /*< private >*/
  47     MachineState parent_obj;
  48     /*< public >*/
  49     RX62NState mcu;
  50 } RxGdbSimMachineState;
  51
  52 #define TYPE_RX_GDBSIM_MACHINE MACHINE_TYPE_NAME("rx62n-common")
  53
  54 #define RX_GDBSIM_MACHINE(obj) \
  55     OBJECT_CHECK(RxGdbSimMachineState, (obj), TYPE_RX_GDBSIM_MACHINE)
  56
  57 #define RX_GDBSIM_MACHINE_CLASS(klass) \
  58     OBJECT_CLASS_CHECK(RxGdbSimMachineClass, (klass), TYPE_RX_GDBSIM_MACHINE)
  59 #define RX_GDBSIM_MACHINE_GET_CLASS(obj) \
  60     OBJECT_GET_CLASS(RxGdbSimMachineClass, (obj), TYPE_RX_GDBSIM_MACHINE)
  61
  62 static void rx_load_image(RXCPU *cpu, const char *filename,
  63                           uint32_t start, uint32_t size)
  64 {
  65     static uint32_t extable[32];
  66     long kernel_size;
  67     int i;
  68
  69     kernel_size = load_image_targphys(filename, start, size);
  70     if (kernel_size < 0) {
  71         fprintf(stderr, "qemu: could not load kernel '%s'\n", filename);
  72         exit(1);
  73     }
  74     cpu->env.pc = start;
  75
  76     /* setup exception trap trampoline */
  77     /* linux kernel only works little-endian mode */
  78     for (i = 0; i < ARRAY_SIZE(extable); i++) {
  79         extable[i] = cpu_to_le32(0x10 + i * 4);
  80     }
  81     rom_add_blob_fixed("extable", extable, sizeof(extable), VECTOR_TABLE_BASE);
  82 }
  83
  84 static void rx_gdbsim_init(MachineState *machine)
  85 {
  86     MachineClass *mc = MACHINE_GET_CLASS(machine);
  87     RxGdbSimMachineState *s = RX_GDBSIM_MACHINE(machine);
  88     RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_GET_CLASS(machine);
  89     MemoryRegion *sysmem = get_system_memory();
  90     const char *kernel_filename = machine->kernel_filename;
  91     const char *dtb_filename = machine->dtb;
  92
  93     if (machine->ram_size < mc->default_ram_size) {
  94         char *sz = size_to_str(mc->default_ram_size);
  95         error_report("Invalid RAM size, should be more than %s", sz);
  96         g_free(sz);
  97     }
  98
  99     /* Allocate memory space */
 100     memory_region_add_subregion(sysmem, SDRAM_BASE, machine->ram);
 101
 102     /* Initialize MCU */
 103     object_initialize_child(OBJECT(machine), "mcu", &s->mcu, rxc->mcu_name);
 104     object_property_set_link(OBJECT(&s->mcu), OBJECT(sysmem),
 105                              "main-bus", &error_abort);
 106     object_property_set_uint(OBJECT(&s->mcu), rxc->xtal_freq_hz,
 107                              "xtal-frequency-hz", &error_abort);
 108     object_property_set_bool(OBJECT(&s->mcu), kernel_filename != NULL,
 109                              "load-kernel", &error_abort);
 110     qdev_realize(DEVICE(&s->mcu), NULL, &error_abort);
 111
 112     /* Load kernel and dtb */
 113     if (kernel_filename) {
 114         ram_addr_t kernel_offset;
 115
 116         /*
 117          * The kernel image is loaded into
 118          * the latter half of the SDRAM space.
 119          */
 120         kernel_offset = machine->ram_size / 2;
 121         rx_load_image(RXCPU(first_cpu), kernel_filename,
 122                       SDRAM_BASE + kernel_offset, kernel_offset);
 123         if (dtb_filename) {
 124             ram_addr_t dtb_offset;
 125             int dtb_size;
 126             void *dtb;
 127
 128             dtb = load_device_tree(dtb_filename, &dtb_size);
 129             if (dtb == NULL) {
 130                 error_report("Couldn't open dtb file %s", dtb_filename);
 131                 exit(1);
 132             }
 133             if (machine->kernel_cmdline &&
 134                 qemu_fdt_setprop_string(dtb, "/chosen", "bootargs",
 135                                         machine->kernel_cmdline) < 0) {
 136                 error_report("Couldn't set /chosen/bootargs");
 137                 exit(1);
 138             }
 139             /* DTB is located at the end of SDRAM space. */
 140             dtb_offset = machine->ram_size - dtb_size;
 141             rom_add_blob_fixed("dtb", dtb, dtb_size,
 142                                SDRAM_BASE + dtb_offset);
 143             /* Set dtb address to R1 */
 144             RXCPU(first_cpu)->env.regs[1] = SDRAM_BASE + dtb_offset;
 145         }
 146     }
 147 }
 148
 149 static void rx_gdbsim_class_init(ObjectClass *oc, void *data)
 150 {
 151     MachineClass *mc = MACHINE_CLASS(oc);
 152
 153     mc->init = rx_gdbsim_init;
 154     mc->default_cpu_type = TYPE_RX62N_CPU;
 155     mc->default_ram_size = 16 * MiB;
 156     mc->default_ram_id = "ext-sdram";
 157 }
 158
 159 static void rx62n7_class_init(ObjectClass *oc, void *data)
 160 {
 161     RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc);
 162     MachineClass *mc = MACHINE_CLASS(oc);
 163
 164     rxc->mcu_name = TYPE_R5F562N7_MCU;
 165     rxc->xtal_freq_hz = 12 * 1000 * 1000;
 166     mc->desc = "gdb simulator (R5F562N7 MCU and external RAM)";
 167 };
 168
 169 static void rx62n8_class_init(ObjectClass *oc, void *data)
 170 {
 171     RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc);
 172     MachineClass *mc = MACHINE_CLASS(oc);
 173
 174     rxc->mcu_name = TYPE_R5F562N8_MCU;
 175     rxc->xtal_freq_hz = 12 * 1000 * 1000;
 176     mc->desc = "gdb simulator (R5F562N8 MCU and external RAM)";
 177 };
 178
 179 static const TypeInfo rx_gdbsim_types[] = {
 180     {
 181         .name           = MACHINE_TYPE_NAME("gdbsim-r5f562n7"),
 182         .parent         = TYPE_RX_GDBSIM_MACHINE,
 183         .class_init     = rx62n7_class_init,
 184     }, {
 185         .name           = MACHINE_TYPE_NAME("gdbsim-r5f562n8"),
 186         .parent         = TYPE_RX_GDBSIM_MACHINE,
 187         .class_init     = rx62n8_class_init,
 188     }, {
 189         .name           = TYPE_RX_GDBSIM_MACHINE,
 190         .parent         = TYPE_MACHINE,
 191         .instance_size  = sizeof(RxGdbSimMachineState),
 192         .class_size     = sizeof(RxGdbSimMachineClass),
 193         .class_init     = rx_gdbsim_class_init,
 194         .abstract       = true,
 195      }
 196 };
 197
 198 DEFINE_TYPES(rx_gdbsim_types)