1 /* 2 * QEMU Leon3 System Emulator 3 * 4 * Copyright (c) 2010-2011 AdaCore 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "hw/hw.h" 25 #include "qemu/timer.h" 26 #include "hw/ptimer.h" 27 #include "char/char.h" 28 #include "sysemu/sysemu.h" 29 #include "hw/boards.h" 30 #include "hw/loader.h" 31 #include "elf.h" 32 #include "trace.h" 33 #include "exec/address-spaces.h" 34 35 #include "hw/grlib.h" 36 37 /* Default system clock. */ 38 #define CPU_CLK (40 * 1000 * 1000) 39 40 #define PROM_FILENAME "u-boot.bin" 41 42 #define MAX_PILS 16 43 44 typedef struct ResetData { 45 SPARCCPU *cpu; 46 uint32_t entry; /* save kernel entry in case of reset */ 47 } ResetData; 48 49 static void main_cpu_reset(void *opaque) 50 { 51 ResetData *s = (ResetData *)opaque; 52 CPUSPARCState *env = &s->cpu->env; 53 54 cpu_reset(CPU(s->cpu)); 55 56 env->halted = 0; 57 env->pc = s->entry; 58 env->npc = s->entry + 4; 59 } 60 61 void leon3_irq_ack(void *irq_manager, int intno) 62 { 63 grlib_irqmp_ack((DeviceState *)irq_manager, intno); 64 } 65 66 static void leon3_set_pil_in(void *opaque, uint32_t pil_in) 67 { 68 CPUSPARCState *env = (CPUSPARCState *)opaque; 69 70 assert(env != NULL); 71 72 env->pil_in = pil_in; 73 74 if (env->pil_in && (env->interrupt_index == 0 || 75 (env->interrupt_index & ~15) == TT_EXTINT)) { 76 unsigned int i; 77 78 for (i = 15; i > 0; i--) { 79 if (env->pil_in & (1 << i)) { 80 int old_interrupt = env->interrupt_index; 81 82 env->interrupt_index = TT_EXTINT | i; 83 if (old_interrupt != env->interrupt_index) { 84 trace_leon3_set_irq(i); 85 cpu_interrupt(env, CPU_INTERRUPT_HARD); 86 } 87 break; 88 } 89 } 90 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) { 91 trace_leon3_reset_irq(env->interrupt_index & 15); 92 env->interrupt_index = 0; 93 cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); 94 } 95 } 96 97 static void leon3_generic_hw_init(QEMUMachineInitArgs *args) 98 { 99 ram_addr_t ram_size = args->ram_size; 100 const char *cpu_model = args->cpu_model; 101 const char *kernel_filename = args->kernel_filename; 102 SPARCCPU *cpu; 103 CPUSPARCState *env; 104 MemoryRegion *address_space_mem = get_system_memory(); 105 MemoryRegion *ram = g_new(MemoryRegion, 1); 106 MemoryRegion *prom = g_new(MemoryRegion, 1); 107 int ret; 108 char *filename; 109 qemu_irq *cpu_irqs = NULL; 110 int bios_size; 111 int prom_size; 112 ResetData *reset_info; 113 114 /* Init CPU */ 115 if (!cpu_model) { 116 cpu_model = "LEON3"; 117 } 118 119 cpu = cpu_sparc_init(cpu_model); 120 if (cpu == NULL) { 121 fprintf(stderr, "qemu: Unable to find Sparc CPU definition\n"); 122 exit(1); 123 } 124 env = &cpu->env; 125 126 cpu_sparc_set_id(env, 0); 127 128 /* Reset data */ 129 reset_info = g_malloc0(sizeof(ResetData)); 130 reset_info->cpu = cpu; 131 qemu_register_reset(main_cpu_reset, reset_info); 132 133 /* Allocate IRQ manager */ 134 grlib_irqmp_create(0x80000200, env, &cpu_irqs, MAX_PILS, &leon3_set_pil_in); 135 136 env->qemu_irq_ack = leon3_irq_manager; 137 138 /* Allocate RAM */ 139 if ((uint64_t)ram_size > (1UL << 30)) { 140 fprintf(stderr, 141 "qemu: Too much memory for this machine: %d, maximum 1G\n", 142 (unsigned int)(ram_size / (1024 * 1024))); 143 exit(1); 144 } 145 146 memory_region_init_ram(ram, "leon3.ram", ram_size); 147 vmstate_register_ram_global(ram); 148 memory_region_add_subregion(address_space_mem, 0x40000000, ram); 149 150 /* Allocate BIOS */ 151 prom_size = 8 * 1024 * 1024; /* 8Mb */ 152 memory_region_init_ram(prom, "Leon3.bios", prom_size); 153 vmstate_register_ram_global(prom); 154 memory_region_set_readonly(prom, true); 155 memory_region_add_subregion(address_space_mem, 0x00000000, prom); 156 157 /* Load boot prom */ 158 if (bios_name == NULL) { 159 bios_name = PROM_FILENAME; 160 } 161 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 162 163 bios_size = get_image_size(filename); 164 165 if (bios_size > prom_size) { 166 fprintf(stderr, "qemu: could not load prom '%s': file too big\n", 167 filename); 168 exit(1); 169 } 170 171 if (bios_size > 0) { 172 ret = load_image_targphys(filename, 0x00000000, bios_size); 173 if (ret < 0 || ret > prom_size) { 174 fprintf(stderr, "qemu: could not load prom '%s'\n", filename); 175 exit(1); 176 } 177 } else if (kernel_filename == NULL) { 178 fprintf(stderr, "Can't read bios image %s\n", filename); 179 exit(1); 180 } 181 182 /* Can directly load an application. */ 183 if (kernel_filename != NULL) { 184 long kernel_size; 185 uint64_t entry; 186 187 kernel_size = load_elf(kernel_filename, NULL, NULL, &entry, NULL, NULL, 188 1 /* big endian */, ELF_MACHINE, 0); 189 if (kernel_size < 0) { 190 fprintf(stderr, "qemu: could not load kernel '%s'\n", 191 kernel_filename); 192 exit(1); 193 } 194 if (bios_size <= 0) { 195 /* If there is no bios/monitor, start the application. */ 196 env->pc = entry; 197 env->npc = entry + 4; 198 reset_info->entry = entry; 199 } 200 } 201 202 /* Allocate timers */ 203 grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6); 204 205 /* Allocate uart */ 206 if (serial_hds[0]) { 207 grlib_apbuart_create(0x80000100, serial_hds[0], cpu_irqs[3]); 208 } 209 } 210 211 static QEMUMachine leon3_generic_machine = { 212 .name = "leon3_generic", 213 .desc = "Leon-3 generic", 214 .init = leon3_generic_hw_init, 215 DEFAULT_MACHINE_OPTIONS, 216 }; 217 218 static void leon3_machine_init(void) 219 { 220 qemu_register_machine(&leon3_generic_machine); 221 } 222 223 machine_init(leon3_machine_init); 224