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 "qemu/guest-random.h" 23 #include "qemu/units.h" 24 #include "qapi/error.h" 25 #include "hw/loader.h" 26 #include "hw/rx/rx62n.h" 27 #include "system/qtest.h" 28 #include "system/device_tree.h" 29 #include "system/reset.h" 30 #include "hw/boards.h" 31 #include "qom/object.h" 32 33 /* Same address of GDB integrated simulator */ 34 #define SDRAM_BASE EXT_CS_BASE 35 36 struct RxGdbSimMachineClass { 37 /*< private >*/ 38 MachineClass parent_class; 39 /*< public >*/ 40 const char *mcu_name; 41 uint32_t xtal_freq_hz; 42 }; 43 typedef struct RxGdbSimMachineClass RxGdbSimMachineClass; 44 45 struct RxGdbSimMachineState { 46 /*< private >*/ 47 MachineState parent_obj; 48 /*< public >*/ 49 RX62NState mcu; 50 }; 51 typedef struct RxGdbSimMachineState RxGdbSimMachineState; 52 53 #define TYPE_RX_GDBSIM_MACHINE MACHINE_TYPE_NAME("rx62n-common") 54 55 DECLARE_OBJ_CHECKERS(RxGdbSimMachineState, RxGdbSimMachineClass, 56 RX_GDBSIM_MACHINE, TYPE_RX_GDBSIM_MACHINE) 57 58 59 static void rx_load_image(RXCPU *cpu, const char *filename, 60 uint32_t start, uint32_t size) 61 { 62 static uint32_t extable[32]; 63 long kernel_size; 64 int i; 65 66 kernel_size = load_image_targphys(filename, start, size); 67 if (kernel_size < 0) { 68 fprintf(stderr, "qemu: could not load kernel '%s'\n", filename); 69 exit(1); 70 } 71 cpu->env.pc = start; 72 73 /* setup exception trap trampoline */ 74 /* linux kernel only works little-endian mode */ 75 for (i = 0; i < ARRAY_SIZE(extable); i++) { 76 extable[i] = cpu_to_le32(0x10 + i * 4); 77 } 78 rom_add_blob_fixed("extable", extable, sizeof(extable), VECTOR_TABLE_BASE); 79 } 80 81 static void rx_gdbsim_init(MachineState *machine) 82 { 83 MachineClass *mc = MACHINE_GET_CLASS(machine); 84 RxGdbSimMachineState *s = RX_GDBSIM_MACHINE(machine); 85 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_GET_CLASS(machine); 86 MemoryRegion *sysmem = get_system_memory(); 87 const char *kernel_filename = machine->kernel_filename; 88 const char *dtb_filename = machine->dtb; 89 uint8_t rng_seed[32]; 90 91 if (machine->ram_size < mc->default_ram_size) { 92 char *sz = size_to_str(mc->default_ram_size); 93 error_report("Invalid RAM size, should be more than %s", sz); 94 g_free(sz); 95 exit(1); 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 } 114 } 115 116 qdev_realize(DEVICE(&s->mcu), NULL, &error_abort); 117 118 /* Load kernel and dtb */ 119 if (kernel_filename) { 120 ram_addr_t kernel_offset; 121 122 /* 123 * The kernel image is loaded into 124 * the latter half of the SDRAM space. 125 */ 126 kernel_offset = machine->ram_size / 2; 127 rx_load_image(&s->mcu.cpu, kernel_filename, 128 SDRAM_BASE + kernel_offset, kernel_offset); 129 if (dtb_filename) { 130 ram_addr_t dtb_offset; 131 int dtb_size; 132 g_autofree void *dtb = load_device_tree(dtb_filename, &dtb_size); 133 134 if (dtb == NULL) { 135 error_report("Couldn't open dtb file %s", dtb_filename); 136 exit(1); 137 } 138 if (machine->kernel_cmdline && 139 qemu_fdt_setprop_string(dtb, "/chosen", "bootargs", 140 machine->kernel_cmdline) < 0) { 141 error_report("Couldn't set /chosen/bootargs"); 142 exit(1); 143 } 144 qemu_guest_getrandom_nofail(rng_seed, sizeof(rng_seed)); 145 qemu_fdt_setprop(dtb, "/chosen", "rng-seed", rng_seed, sizeof(rng_seed)); 146 /* DTB is located at the end of SDRAM space. */ 147 dtb_offset = ROUND_DOWN(machine->ram_size - dtb_size, 16); 148 rom_add_blob_fixed("dtb", dtb, dtb_size, 149 SDRAM_BASE + dtb_offset); 150 qemu_register_reset_nosnapshotload(qemu_fdt_randomize_seeds, 151 rom_ptr(SDRAM_BASE + dtb_offset, dtb_size)); 152 /* Set dtb address to R1 */ 153 s->mcu.cpu.env.regs[1] = SDRAM_BASE + dtb_offset; 154 } 155 } 156 } 157 158 static void rx_gdbsim_class_init(ObjectClass *oc, void *data) 159 { 160 MachineClass *mc = MACHINE_CLASS(oc); 161 162 mc->init = rx_gdbsim_init; 163 mc->default_cpu_type = TYPE_RX62N_CPU; 164 mc->default_ram_size = 16 * MiB; 165 mc->default_ram_id = "ext-sdram"; 166 } 167 168 static void rx62n7_class_init(ObjectClass *oc, void *data) 169 { 170 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc); 171 MachineClass *mc = MACHINE_CLASS(oc); 172 173 rxc->mcu_name = TYPE_R5F562N7_MCU; 174 rxc->xtal_freq_hz = 12 * 1000 * 1000; 175 mc->desc = "gdb simulator (R5F562N7 MCU and external RAM)"; 176 }; 177 178 static void rx62n8_class_init(ObjectClass *oc, void *data) 179 { 180 RxGdbSimMachineClass *rxc = RX_GDBSIM_MACHINE_CLASS(oc); 181 MachineClass *mc = MACHINE_CLASS(oc); 182 183 rxc->mcu_name = TYPE_R5F562N8_MCU; 184 rxc->xtal_freq_hz = 12 * 1000 * 1000; 185 mc->desc = "gdb simulator (R5F562N8 MCU and external RAM)"; 186 }; 187 188 static const TypeInfo rx_gdbsim_types[] = { 189 { 190 .name = MACHINE_TYPE_NAME("gdbsim-r5f562n7"), 191 .parent = TYPE_RX_GDBSIM_MACHINE, 192 .class_init = rx62n7_class_init, 193 }, { 194 .name = MACHINE_TYPE_NAME("gdbsim-r5f562n8"), 195 .parent = TYPE_RX_GDBSIM_MACHINE, 196 .class_init = rx62n8_class_init, 197 }, { 198 .name = TYPE_RX_GDBSIM_MACHINE, 199 .parent = TYPE_MACHINE, 200 .instance_size = sizeof(RxGdbSimMachineState), 201 .class_size = sizeof(RxGdbSimMachineClass), 202 .class_init = rx_gdbsim_class_init, 203 .abstract = true, 204 } 205 }; 206 207 DEFINE_TYPES(rx_gdbsim_types) 208