1 /* 2 * QEMU Leon3 System Emulator 3 * 4 * Copyright (c) 2010-2019 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 25 #include "qemu/osdep.h" 26 #include "qemu/units.h" 27 #include "qemu/error-report.h" 28 #include "qapi/error.h" 29 #include "qemu-common.h" 30 #include "qemu/datadir.h" 31 #include "cpu.h" 32 #include "hw/irq.h" 33 #include "qemu/timer.h" 34 #include "hw/ptimer.h" 35 #include "hw/qdev-properties.h" 36 #include "sysemu/sysemu.h" 37 #include "sysemu/qtest.h" 38 #include "sysemu/reset.h" 39 #include "hw/boards.h" 40 #include "hw/loader.h" 41 #include "elf.h" 42 #include "trace.h" 43 44 #include "hw/sparc/grlib.h" 45 #include "hw/misc/grlib_ahb_apb_pnp.h" 46 47 /* Default system clock. */ 48 #define CPU_CLK (40 * 1000 * 1000) 49 50 #define LEON3_PROM_FILENAME "u-boot.bin" 51 #define LEON3_PROM_OFFSET (0x00000000) 52 #define LEON3_RAM_OFFSET (0x40000000) 53 54 #define LEON3_UART_OFFSET (0x80000100) 55 #define LEON3_UART_IRQ (3) 56 57 #define LEON3_IRQMP_OFFSET (0x80000200) 58 59 #define LEON3_TIMER_OFFSET (0x80000300) 60 #define LEON3_TIMER_IRQ (6) 61 #define LEON3_TIMER_COUNT (2) 62 63 #define LEON3_APB_PNP_OFFSET (0x800FF000) 64 #define LEON3_AHB_PNP_OFFSET (0xFFFFF000) 65 66 typedef struct ResetData { 67 SPARCCPU *cpu; 68 uint32_t entry; /* save kernel entry in case of reset */ 69 target_ulong sp; /* initial stack pointer */ 70 } ResetData; 71 72 static uint32_t *gen_store_u32(uint32_t *code, hwaddr addr, uint32_t val) 73 { 74 stl_p(code++, 0x82100000); /* mov %g0, %g1 */ 75 stl_p(code++, 0x84100000); /* mov %g0, %g2 */ 76 stl_p(code++, 0x03000000 + 77 extract32(addr, 10, 22)); 78 /* sethi %hi(addr), %g1 */ 79 stl_p(code++, 0x82106000 + 80 extract32(addr, 0, 10)); 81 /* or %g1, addr, %g1 */ 82 stl_p(code++, 0x05000000 + 83 extract32(val, 10, 22)); 84 /* sethi %hi(val), %g2 */ 85 stl_p(code++, 0x8410a000 + 86 extract32(val, 0, 10)); 87 /* or %g2, val, %g2 */ 88 stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ] */ 89 90 return code; 91 } 92 93 /* 94 * When loading a kernel in RAM the machine is expected to be in a different 95 * state (eg: initialized by the bootloader). This little code reproduces 96 * this behavior. 97 */ 98 static void write_bootloader(CPUSPARCState *env, uint8_t *base, 99 hwaddr kernel_addr) 100 { 101 uint32_t *p = (uint32_t *) base; 102 103 /* Initialize the UARTs */ 104 /* *UART_CONTROL = UART_RECEIVE_ENABLE | UART_TRANSMIT_ENABLE; */ 105 p = gen_store_u32(p, 0x80000108, 3); 106 107 /* Initialize the TIMER 0 */ 108 /* *GPTIMER_SCALER_RELOAD = 40 - 1; */ 109 p = gen_store_u32(p, 0x80000304, 39); 110 /* *GPTIMER0_COUNTER_RELOAD = 0xFFFE; */ 111 p = gen_store_u32(p, 0x80000314, 0xFFFFFFFE); 112 /* *GPTIMER0_CONFIG = GPTIMER_ENABLE | GPTIMER_RESTART; */ 113 p = gen_store_u32(p, 0x80000318, 3); 114 115 /* JUMP to the entry point */ 116 stl_p(p++, 0x82100000); /* mov %g0, %g1 */ 117 stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22)); 118 /* sethi %hi(kernel_addr), %g1 */ 119 stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10)); 120 /* or kernel_addr, %g1 */ 121 stl_p(p++, 0x81c04000); /* jmp %g1 */ 122 stl_p(p++, 0x01000000); /* nop */ 123 } 124 125 static void main_cpu_reset(void *opaque) 126 { 127 ResetData *s = (ResetData *)opaque; 128 CPUState *cpu = CPU(s->cpu); 129 CPUSPARCState *env = &s->cpu->env; 130 131 cpu_reset(cpu); 132 133 cpu->halted = 0; 134 env->pc = s->entry; 135 env->npc = s->entry + 4; 136 env->regbase[6] = s->sp; 137 } 138 139 static void leon3_cache_control_int(CPUSPARCState *env) 140 { 141 uint32_t state = 0; 142 143 if (env->cache_control & CACHE_CTRL_IF) { 144 /* Instruction cache state */ 145 state = env->cache_control & CACHE_STATE_MASK; 146 if (state == CACHE_ENABLED) { 147 state = CACHE_FROZEN; 148 trace_int_helper_icache_freeze(); 149 } 150 151 env->cache_control &= ~CACHE_STATE_MASK; 152 env->cache_control |= state; 153 } 154 155 if (env->cache_control & CACHE_CTRL_DF) { 156 /* Data cache state */ 157 state = (env->cache_control >> 2) & CACHE_STATE_MASK; 158 if (state == CACHE_ENABLED) { 159 state = CACHE_FROZEN; 160 trace_int_helper_dcache_freeze(); 161 } 162 163 env->cache_control &= ~(CACHE_STATE_MASK << 2); 164 env->cache_control |= (state << 2); 165 } 166 } 167 168 static void leon3_irq_ack(void *irq_manager, int intno) 169 { 170 grlib_irqmp_ack((DeviceState *)irq_manager, intno); 171 } 172 173 /* 174 * This device assumes that the incoming 'level' value on the 175 * qemu_irq is the interrupt number, not just a simple 0/1 level. 176 */ 177 static void leon3_set_pil_in(void *opaque, int n, int level) 178 { 179 CPUSPARCState *env = opaque; 180 uint32_t pil_in = level; 181 CPUState *cs; 182 183 assert(env != NULL); 184 185 env->pil_in = pil_in; 186 187 if (env->pil_in && (env->interrupt_index == 0 || 188 (env->interrupt_index & ~15) == TT_EXTINT)) { 189 unsigned int i; 190 191 for (i = 15; i > 0; i--) { 192 if (env->pil_in & (1 << i)) { 193 int old_interrupt = env->interrupt_index; 194 195 env->interrupt_index = TT_EXTINT | i; 196 if (old_interrupt != env->interrupt_index) { 197 cs = env_cpu(env); 198 trace_leon3_set_irq(i); 199 cpu_interrupt(cs, CPU_INTERRUPT_HARD); 200 } 201 break; 202 } 203 } 204 } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) { 205 cs = env_cpu(env); 206 trace_leon3_reset_irq(env->interrupt_index & 15); 207 env->interrupt_index = 0; 208 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD); 209 } 210 } 211 212 static void leon3_irq_manager(CPUSPARCState *env, void *irq_manager, int intno) 213 { 214 leon3_irq_ack(irq_manager, intno); 215 leon3_cache_control_int(env); 216 } 217 218 static void leon3_generic_hw_init(MachineState *machine) 219 { 220 ram_addr_t ram_size = machine->ram_size; 221 const char *bios_name = machine->firmware ?: LEON3_PROM_FILENAME; 222 const char *kernel_filename = machine->kernel_filename; 223 SPARCCPU *cpu; 224 CPUSPARCState *env; 225 MemoryRegion *address_space_mem = get_system_memory(); 226 MemoryRegion *prom = g_new(MemoryRegion, 1); 227 int ret; 228 char *filename; 229 int bios_size; 230 int prom_size; 231 ResetData *reset_info; 232 DeviceState *dev, *irqmpdev; 233 int i; 234 AHBPnp *ahb_pnp; 235 APBPnp *apb_pnp; 236 237 /* Init CPU */ 238 cpu = SPARC_CPU(cpu_create(machine->cpu_type)); 239 env = &cpu->env; 240 241 cpu_sparc_set_id(env, 0); 242 243 /* Reset data */ 244 reset_info = g_new0(ResetData, 1); 245 reset_info->cpu = cpu; 246 reset_info->sp = LEON3_RAM_OFFSET + ram_size; 247 qemu_register_reset(main_cpu_reset, reset_info); 248 249 ahb_pnp = GRLIB_AHB_PNP(qdev_new(TYPE_GRLIB_AHB_PNP)); 250 sysbus_realize_and_unref(SYS_BUS_DEVICE(ahb_pnp), &error_fatal); 251 sysbus_mmio_map(SYS_BUS_DEVICE(ahb_pnp), 0, LEON3_AHB_PNP_OFFSET); 252 grlib_ahb_pnp_add_entry(ahb_pnp, 0, 0, GRLIB_VENDOR_GAISLER, 253 GRLIB_LEON3_DEV, GRLIB_AHB_MASTER, 254 GRLIB_CPU_AREA); 255 256 apb_pnp = GRLIB_APB_PNP(qdev_new(TYPE_GRLIB_APB_PNP)); 257 sysbus_realize_and_unref(SYS_BUS_DEVICE(apb_pnp), &error_fatal); 258 sysbus_mmio_map(SYS_BUS_DEVICE(apb_pnp), 0, LEON3_APB_PNP_OFFSET); 259 grlib_ahb_pnp_add_entry(ahb_pnp, LEON3_APB_PNP_OFFSET, 0xFFF, 260 GRLIB_VENDOR_GAISLER, GRLIB_APBMST_DEV, 261 GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA); 262 263 /* Allocate IRQ manager */ 264 irqmpdev = qdev_new(TYPE_GRLIB_IRQMP); 265 qdev_init_gpio_in_named_with_opaque(DEVICE(cpu), leon3_set_pil_in, 266 env, "pil", 1); 267 qdev_connect_gpio_out_named(irqmpdev, "grlib-irq", 0, 268 qdev_get_gpio_in_named(DEVICE(cpu), "pil", 0)); 269 sysbus_realize_and_unref(SYS_BUS_DEVICE(irqmpdev), &error_fatal); 270 sysbus_mmio_map(SYS_BUS_DEVICE(irqmpdev), 0, LEON3_IRQMP_OFFSET); 271 env->irq_manager = irqmpdev; 272 env->qemu_irq_ack = leon3_irq_manager; 273 grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF, 274 GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV, 275 2, 0, GRLIB_APBIO_AREA); 276 277 /* Allocate RAM */ 278 if (ram_size > 1 * GiB) { 279 error_report("Too much memory for this machine: %" PRId64 "MB," 280 " maximum 1G", 281 ram_size / MiB); 282 exit(1); 283 } 284 285 memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET, 286 machine->ram); 287 288 /* Allocate BIOS */ 289 prom_size = 8 * MiB; 290 memory_region_init_rom(prom, NULL, "Leon3.bios", prom_size, &error_fatal); 291 memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom); 292 293 /* Load boot prom */ 294 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 295 296 if (filename) { 297 bios_size = get_image_size(filename); 298 } else { 299 bios_size = -1; 300 } 301 302 if (bios_size > prom_size) { 303 error_report("could not load prom '%s': file too big", filename); 304 exit(1); 305 } 306 307 if (bios_size > 0) { 308 ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size); 309 if (ret < 0 || ret > prom_size) { 310 error_report("could not load prom '%s'", filename); 311 exit(1); 312 } 313 } else if (kernel_filename == NULL && !qtest_enabled()) { 314 error_report("Can't read bios image '%s'", filename 315 ? filename 316 : LEON3_PROM_FILENAME); 317 exit(1); 318 } 319 g_free(filename); 320 321 /* Can directly load an application. */ 322 if (kernel_filename != NULL) { 323 long kernel_size; 324 uint64_t entry; 325 326 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, 327 &entry, NULL, NULL, NULL, 328 1 /* big endian */, EM_SPARC, 0, 0); 329 if (kernel_size < 0) { 330 kernel_size = load_uimage(kernel_filename, NULL, &entry, 331 NULL, NULL, NULL); 332 } 333 if (kernel_size < 0) { 334 error_report("could not load kernel '%s'", kernel_filename); 335 exit(1); 336 } 337 if (bios_size <= 0) { 338 /* 339 * If there is no bios/monitor just start the application but put 340 * the machine in an initialized state through a little 341 * bootloader. 342 */ 343 uint8_t *bootloader_entry; 344 345 bootloader_entry = memory_region_get_ram_ptr(prom); 346 write_bootloader(env, bootloader_entry, entry); 347 env->pc = LEON3_PROM_OFFSET; 348 env->npc = LEON3_PROM_OFFSET + 4; 349 reset_info->entry = LEON3_PROM_OFFSET; 350 } 351 } 352 353 /* Allocate timers */ 354 dev = qdev_new(TYPE_GRLIB_GPTIMER); 355 qdev_prop_set_uint32(dev, "nr-timers", LEON3_TIMER_COUNT); 356 qdev_prop_set_uint32(dev, "frequency", CPU_CLK); 357 qdev_prop_set_uint32(dev, "irq-line", LEON3_TIMER_IRQ); 358 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 359 360 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET); 361 for (i = 0; i < LEON3_TIMER_COUNT; i++) { 362 sysbus_connect_irq(SYS_BUS_DEVICE(dev), i, 363 qdev_get_gpio_in(irqmpdev, LEON3_TIMER_IRQ + i)); 364 } 365 366 grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF, 367 GRLIB_VENDOR_GAISLER, GRLIB_GPTIMER_DEV, 368 0, LEON3_TIMER_IRQ, GRLIB_APBIO_AREA); 369 370 /* Allocate uart */ 371 dev = qdev_new(TYPE_GRLIB_APB_UART); 372 qdev_prop_set_chr(dev, "chrdev", serial_hd(0)); 373 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 374 sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET); 375 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, 376 qdev_get_gpio_in(irqmpdev, LEON3_UART_IRQ)); 377 grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF, 378 GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1, 379 LEON3_UART_IRQ, GRLIB_APBIO_AREA); 380 } 381 382 static void leon3_generic_machine_init(MachineClass *mc) 383 { 384 mc->desc = "Leon-3 generic"; 385 mc->init = leon3_generic_hw_init; 386 mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3"); 387 mc->default_ram_id = "leon3.ram"; 388 } 389 390 DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init) 391