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 #include "qom/object.h" 34 35 /* Same address of GDB integrated simulator */ 36 #define SDRAM_BASE EXT_CS_BASE 37 38 struct RxGdbSimMachineClass { 39 /*< private >*/ 40 MachineClass parent_class; 41 /*< public >*/ 42 const char *mcu_name; 43 uint32_t xtal_freq_hz; 44 }; 45 typedef struct RxGdbSimMachineClass RxGdbSimMachineClass; 46 47 struct RxGdbSimMachineState { 48 /*< private >*/ 49 MachineState parent_obj; 50 /*< public >*/ 51 RX62NState mcu; 52 }; 53 typedef struct RxGdbSimMachineState RxGdbSimMachineState; 54 55 #define TYPE_RX_GDBSIM_MACHINE MACHINE_TYPE_NAME("rx62n-common") 56 57 DECLARE_OBJ_CHECKERS(RxGdbSimMachineState, RxGdbSimMachineClass, 58 RX_GDBSIM_MACHINE, TYPE_RX_GDBSIM_MACHINE) 59 60 61 static void rx_load_image(RXCPU *cpu, const char *filename, 62 uint32_t start, uint32_t size) 63 { 64 static uint32_t extable[32]; 65 long kernel_size; 66 int i; 67 68 kernel_size = load_image_targphys(filename, start, size); 69 if (kernel_size < 0) { 70 fprintf(stderr, "qemu: could not load kernel '%s'\n", filename); 71 exit(1); 72 } 73 cpu->env.pc = start; 74 75 /* setup exception trap trampoline */ 76 /* linux kernel only works little-endian mode */ 77 for (i = 0; i < ARRAY_SIZE(extable); i++) { 78 extable[i] = cpu_to_le32(0x10 + i * 4); 79 } 80 rom_add_blob_fixed("extable", extable, sizeof(extable), VECTOR_TABLE_BASE); 81 } 82 83 static void rx_gdbsim_init(MachineState *machine) 84 { 85 MachineClass *mc = MACHINE_GET_CLASS(machine); 86 RxGdbSimMachineState *s = RX_GDBSIM_MACHINE(machine); 87 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_GET_CLASS(machine); 88 MemoryRegion *sysmem = get_system_memory(); 89 const char *kernel_filename = machine->kernel_filename; 90 const char *dtb_filename = machine->dtb; 91 92 if (machine->ram_size < mc->default_ram_size) { 93 char *sz = size_to_str(mc->default_ram_size); 94 error_report("Invalid RAM size, should be more than %s", sz); 95 g_free(sz); 96 } 97 98 /* Allocate memory space */ 99 memory_region_add_subregion(sysmem, SDRAM_BASE, machine->ram); 100 101 /* Initialize MCU */ 102 object_initialize_child(OBJECT(machine), "mcu", &s->mcu, rxc->mcu_name); 103 object_property_set_link(OBJECT(&s->mcu), "main-bus", OBJECT(sysmem), 104 &error_abort); 105 object_property_set_uint(OBJECT(&s->mcu), "xtal-frequency-hz", 106 rxc->xtal_freq_hz, &error_abort); 107 object_property_set_bool(OBJECT(&s->mcu), "load-kernel", 108 kernel_filename != NULL, &error_abort); 109 110 if (!kernel_filename) { 111 if (machine->firmware) { 112 rom_add_file_fixed(machine->firmware, RX62N_CFLASH_BASE, 0); 113 } else if (!qtest_enabled()) { 114 error_report("No bios or kernel specified"); 115 exit(1); 116 } 117 } 118 119 qdev_realize(DEVICE(&s->mcu), NULL, &error_abort); 120 121 /* Load kernel and dtb */ 122 if (kernel_filename) { 123 ram_addr_t kernel_offset; 124 125 /* 126 * The kernel image is loaded into 127 * the latter half of the SDRAM space. 128 */ 129 kernel_offset = machine->ram_size / 2; 130 rx_load_image(RX_CPU(first_cpu), kernel_filename, 131 SDRAM_BASE + kernel_offset, kernel_offset); 132 if (dtb_filename) { 133 ram_addr_t dtb_offset; 134 int dtb_size; 135 g_autofree void *dtb = load_device_tree(dtb_filename, &dtb_size); 136 137 if (dtb == NULL) { 138 error_report("Couldn't open dtb file %s", dtb_filename); 139 exit(1); 140 } 141 if (machine->kernel_cmdline && 142 qemu_fdt_setprop_string(dtb, "/chosen", "bootargs", 143 machine->kernel_cmdline) < 0) { 144 error_report("Couldn't set /chosen/bootargs"); 145 exit(1); 146 } 147 /* DTB is located at the end of SDRAM space. */ 148 dtb_offset = machine->ram_size - dtb_size; 149 rom_add_blob_fixed("dtb", dtb, dtb_size, 150 SDRAM_BASE + dtb_offset); 151 /* Set dtb address to R1 */ 152 RX_CPU(first_cpu)->env.regs[1] = SDRAM_BASE + dtb_offset; 153 } 154 } 155 } 156 157 static void rx_gdbsim_class_init(ObjectClass *oc, void *data) 158 { 159 MachineClass *mc = MACHINE_CLASS(oc); 160 161 mc->init = rx_gdbsim_init; 162 mc->default_cpu_type = TYPE_RX62N_CPU; 163 mc->default_ram_size = 16 * MiB; 164 mc->default_ram_id = "ext-sdram"; 165 } 166 167 static void rx62n7_class_init(ObjectClass *oc, void *data) 168 { 169 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc); 170 MachineClass *mc = MACHINE_CLASS(oc); 171 172 rxc->mcu_name = TYPE_R5F562N7_MCU; 173 rxc->xtal_freq_hz = 12 * 1000 * 1000; 174 mc->desc = "gdb simulator (R5F562N7 MCU and external RAM)"; 175 }; 176 177 static void rx62n8_class_init(ObjectClass *oc, void *data) 178 { 179 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc); 180 MachineClass *mc = MACHINE_CLASS(oc); 181 182 rxc->mcu_name = TYPE_R5F562N8_MCU; 183 rxc->xtal_freq_hz = 12 * 1000 * 1000; 184 mc->desc = "gdb simulator (R5F562N8 MCU and external RAM)"; 185 }; 186 187 static const TypeInfo rx_gdbsim_types[] = { 188 { 189 .name = MACHINE_TYPE_NAME("gdbsim-r5f562n7"), 190 .parent = TYPE_RX_GDBSIM_MACHINE, 191 .class_init = rx62n7_class_init, 192 }, { 193 .name = MACHINE_TYPE_NAME("gdbsim-r5f562n8"), 194 .parent = TYPE_RX_GDBSIM_MACHINE, 195 .class_init = rx62n8_class_init, 196 }, { 197 .name = TYPE_RX_GDBSIM_MACHINE, 198 .parent = TYPE_MACHINE, 199 .instance_size = sizeof(RxGdbSimMachineState), 200 .class_size = sizeof(RxGdbSimMachineClass), 201 .class_init = rx_gdbsim_class_init, 202 .abstract = true, 203 } 204 }; 205 206 DEFINE_TYPES(rx_gdbsim_types) 207