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) 199