1 /* 2 * Motorola ColdFire MCF5208 SoC emulation. 3 * 4 * Copyright (c) 2007 CodeSourcery. 5 * 6 * This code is licensed under the GPL 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qemu/units.h" 11 #include "qemu/error-report.h" 12 #include "qemu/main-loop.h" 13 #include "qapi/error.h" 14 #include "qemu-common.h" 15 #include "cpu.h" 16 #include "hw/hw.h" 17 #include "hw/irq.h" 18 #include "hw/m68k/mcf.h" 19 #include "hw/m68k/mcf_fec.h" 20 #include "qemu/timer.h" 21 #include "hw/ptimer.h" 22 #include "sysemu/sysemu.h" 23 #include "sysemu/qtest.h" 24 #include "net/net.h" 25 #include "hw/boards.h" 26 #include "hw/loader.h" 27 #include "hw/sysbus.h" 28 #include "elf.h" 29 #include "exec/address-spaces.h" 30 31 #define SYS_FREQ 166666666 32 33 #define ROM_SIZE 0x200000 34 35 #define PCSR_EN 0x0001 36 #define PCSR_RLD 0x0002 37 #define PCSR_PIF 0x0004 38 #define PCSR_PIE 0x0008 39 #define PCSR_OVW 0x0010 40 #define PCSR_DBG 0x0020 41 #define PCSR_DOZE 0x0040 42 #define PCSR_PRE_SHIFT 8 43 #define PCSR_PRE_MASK 0x0f00 44 45 typedef struct { 46 MemoryRegion iomem; 47 qemu_irq irq; 48 ptimer_state *timer; 49 uint16_t pcsr; 50 uint16_t pmr; 51 uint16_t pcntr; 52 } m5208_timer_state; 53 54 static void m5208_timer_update(m5208_timer_state *s) 55 { 56 if ((s->pcsr & (PCSR_PIE | PCSR_PIF)) == (PCSR_PIE | PCSR_PIF)) 57 qemu_irq_raise(s->irq); 58 else 59 qemu_irq_lower(s->irq); 60 } 61 62 static void m5208_timer_write(void *opaque, hwaddr offset, 63 uint64_t value, unsigned size) 64 { 65 m5208_timer_state *s = (m5208_timer_state *)opaque; 66 int prescale; 67 int limit; 68 switch (offset) { 69 case 0: 70 /* The PIF bit is set-to-clear. */ 71 if (value & PCSR_PIF) { 72 s->pcsr &= ~PCSR_PIF; 73 value &= ~PCSR_PIF; 74 } 75 /* Avoid frobbing the timer if we're just twiddling IRQ bits. */ 76 if (((s->pcsr ^ value) & ~PCSR_PIE) == 0) { 77 s->pcsr = value; 78 m5208_timer_update(s); 79 return; 80 } 81 82 if (s->pcsr & PCSR_EN) 83 ptimer_stop(s->timer); 84 85 s->pcsr = value; 86 87 prescale = 1 << ((s->pcsr & PCSR_PRE_MASK) >> PCSR_PRE_SHIFT); 88 ptimer_set_freq(s->timer, (SYS_FREQ / 2) / prescale); 89 if (s->pcsr & PCSR_RLD) 90 limit = s->pmr; 91 else 92 limit = 0xffff; 93 ptimer_set_limit(s->timer, limit, 0); 94 95 if (s->pcsr & PCSR_EN) 96 ptimer_run(s->timer, 0); 97 break; 98 case 2: 99 s->pmr = value; 100 s->pcsr &= ~PCSR_PIF; 101 if ((s->pcsr & PCSR_RLD) == 0) { 102 if (s->pcsr & PCSR_OVW) 103 ptimer_set_count(s->timer, value); 104 } else { 105 ptimer_set_limit(s->timer, value, s->pcsr & PCSR_OVW); 106 } 107 break; 108 case 4: 109 break; 110 default: 111 hw_error("m5208_timer_write: Bad offset 0x%x\n", (int)offset); 112 break; 113 } 114 m5208_timer_update(s); 115 } 116 117 static void m5208_timer_trigger(void *opaque) 118 { 119 m5208_timer_state *s = (m5208_timer_state *)opaque; 120 s->pcsr |= PCSR_PIF; 121 m5208_timer_update(s); 122 } 123 124 static uint64_t m5208_timer_read(void *opaque, hwaddr addr, 125 unsigned size) 126 { 127 m5208_timer_state *s = (m5208_timer_state *)opaque; 128 switch (addr) { 129 case 0: 130 return s->pcsr; 131 case 2: 132 return s->pmr; 133 case 4: 134 return ptimer_get_count(s->timer); 135 default: 136 hw_error("m5208_timer_read: Bad offset 0x%x\n", (int)addr); 137 return 0; 138 } 139 } 140 141 static const MemoryRegionOps m5208_timer_ops = { 142 .read = m5208_timer_read, 143 .write = m5208_timer_write, 144 .endianness = DEVICE_NATIVE_ENDIAN, 145 }; 146 147 static uint64_t m5208_sys_read(void *opaque, hwaddr addr, 148 unsigned size) 149 { 150 switch (addr) { 151 case 0x110: /* SDCS0 */ 152 { 153 int n; 154 for (n = 0; n < 32; n++) { 155 if (ram_size < (2u << n)) 156 break; 157 } 158 return (n - 1) | 0x40000000; 159 } 160 case 0x114: /* SDCS1 */ 161 return 0; 162 163 default: 164 hw_error("m5208_sys_read: Bad offset 0x%x\n", (int)addr); 165 return 0; 166 } 167 } 168 169 static void m5208_sys_write(void *opaque, hwaddr addr, 170 uint64_t value, unsigned size) 171 { 172 hw_error("m5208_sys_write: Bad offset 0x%x\n", (int)addr); 173 } 174 175 static const MemoryRegionOps m5208_sys_ops = { 176 .read = m5208_sys_read, 177 .write = m5208_sys_write, 178 .endianness = DEVICE_NATIVE_ENDIAN, 179 }; 180 181 static void mcf5208_sys_init(MemoryRegion *address_space, qemu_irq *pic) 182 { 183 MemoryRegion *iomem = g_new(MemoryRegion, 1); 184 m5208_timer_state *s; 185 QEMUBH *bh; 186 int i; 187 188 /* SDRAMC. */ 189 memory_region_init_io(iomem, NULL, &m5208_sys_ops, NULL, "m5208-sys", 0x00004000); 190 memory_region_add_subregion(address_space, 0xfc0a8000, iomem); 191 /* Timers. */ 192 for (i = 0; i < 2; i++) { 193 s = g_new0(m5208_timer_state, 1); 194 bh = qemu_bh_new(m5208_timer_trigger, s); 195 s->timer = ptimer_init_with_bh(bh, PTIMER_POLICY_DEFAULT); 196 memory_region_init_io(&s->iomem, NULL, &m5208_timer_ops, s, 197 "m5208-timer", 0x00004000); 198 memory_region_add_subregion(address_space, 0xfc080000 + 0x4000 * i, 199 &s->iomem); 200 s->irq = pic[4 + i]; 201 } 202 } 203 204 static void mcf_fec_init(MemoryRegion *sysmem, NICInfo *nd, hwaddr base, 205 qemu_irq *irqs) 206 { 207 DeviceState *dev; 208 SysBusDevice *s; 209 int i; 210 211 qemu_check_nic_model(nd, TYPE_MCF_FEC_NET); 212 dev = qdev_create(NULL, TYPE_MCF_FEC_NET); 213 qdev_set_nic_properties(dev, nd); 214 qdev_init_nofail(dev); 215 216 s = SYS_BUS_DEVICE(dev); 217 for (i = 0; i < FEC_NUM_IRQ; i++) { 218 sysbus_connect_irq(s, i, irqs[i]); 219 } 220 221 memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0)); 222 } 223 224 static void mcf5208evb_init(MachineState *machine) 225 { 226 ram_addr_t ram_size = machine->ram_size; 227 const char *kernel_filename = machine->kernel_filename; 228 M68kCPU *cpu; 229 CPUM68KState *env; 230 int kernel_size; 231 uint64_t elf_entry; 232 hwaddr entry; 233 qemu_irq *pic; 234 MemoryRegion *address_space_mem = get_system_memory(); 235 MemoryRegion *rom = g_new(MemoryRegion, 1); 236 MemoryRegion *ram = g_new(MemoryRegion, 1); 237 MemoryRegion *sram = g_new(MemoryRegion, 1); 238 239 cpu = M68K_CPU(cpu_create(machine->cpu_type)); 240 env = &cpu->env; 241 242 /* Initialize CPU registers. */ 243 env->vbr = 0; 244 /* TODO: Configure BARs. */ 245 246 /* ROM at 0x00000000 */ 247 memory_region_init_rom(rom, NULL, "mcf5208.rom", ROM_SIZE, &error_fatal); 248 memory_region_add_subregion(address_space_mem, 0x00000000, rom); 249 250 /* DRAM at 0x40000000 */ 251 memory_region_allocate_system_memory(ram, NULL, "mcf5208.ram", ram_size); 252 memory_region_add_subregion(address_space_mem, 0x40000000, ram); 253 254 /* Internal SRAM. */ 255 memory_region_init_ram(sram, NULL, "mcf5208.sram", 16 * KiB, &error_fatal); 256 memory_region_add_subregion(address_space_mem, 0x80000000, sram); 257 258 /* Internal peripherals. */ 259 pic = mcf_intc_init(address_space_mem, 0xfc048000, cpu); 260 261 mcf_uart_mm_init(0xfc060000, pic[26], serial_hd(0)); 262 mcf_uart_mm_init(0xfc064000, pic[27], serial_hd(1)); 263 mcf_uart_mm_init(0xfc068000, pic[28], serial_hd(2)); 264 265 mcf5208_sys_init(address_space_mem, pic); 266 267 if (nb_nics > 1) { 268 error_report("Too many NICs"); 269 exit(1); 270 } 271 if (nd_table[0].used) { 272 mcf_fec_init(address_space_mem, &nd_table[0], 273 0xfc030000, pic + 36); 274 } 275 276 g_free(pic); 277 278 /* 0xfc000000 SCM. */ 279 /* 0xfc004000 XBS. */ 280 /* 0xfc008000 FlexBus CS. */ 281 /* 0xfc030000 FEC. */ 282 /* 0xfc040000 SCM + Power management. */ 283 /* 0xfc044000 eDMA. */ 284 /* 0xfc048000 INTC. */ 285 /* 0xfc058000 I2C. */ 286 /* 0xfc05c000 QSPI. */ 287 /* 0xfc060000 UART0. */ 288 /* 0xfc064000 UART0. */ 289 /* 0xfc068000 UART0. */ 290 /* 0xfc070000 DMA timers. */ 291 /* 0xfc080000 PIT0. */ 292 /* 0xfc084000 PIT1. */ 293 /* 0xfc088000 EPORT. */ 294 /* 0xfc08c000 Watchdog. */ 295 /* 0xfc090000 clock module. */ 296 /* 0xfc0a0000 CCM + reset. */ 297 /* 0xfc0a4000 GPIO. */ 298 /* 0xfc0a8000 SDRAM controller. */ 299 300 /* Load firmware */ 301 if (bios_name) { 302 char *fn; 303 uint8_t *ptr; 304 305 fn = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); 306 if (!fn) { 307 error_report("Could not find ROM image '%s'", bios_name); 308 exit(1); 309 } 310 if (load_image_targphys(fn, 0x0, ROM_SIZE) < 8) { 311 error_report("Could not load ROM image '%s'", bios_name); 312 exit(1); 313 } 314 g_free(fn); 315 /* Initial PC is always at offset 4 in firmware binaries */ 316 ptr = rom_ptr(0x4, 4); 317 assert(ptr != NULL); 318 env->pc = ldl_p(ptr); 319 } 320 321 /* Load kernel. */ 322 if (!kernel_filename) { 323 if (qtest_enabled() || bios_name) { 324 return; 325 } 326 error_report("Kernel image must be specified"); 327 exit(1); 328 } 329 330 kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry, 331 NULL, NULL, 1, EM_68K, 0, 0); 332 entry = elf_entry; 333 if (kernel_size < 0) { 334 kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL, 335 NULL, NULL); 336 } 337 if (kernel_size < 0) { 338 kernel_size = load_image_targphys(kernel_filename, 0x40000000, 339 ram_size); 340 entry = 0x40000000; 341 } 342 if (kernel_size < 0) { 343 error_report("Could not load kernel '%s'", kernel_filename); 344 exit(1); 345 } 346 347 env->pc = entry; 348 } 349 350 static void mcf5208evb_machine_init(MachineClass *mc) 351 { 352 mc->desc = "MCF5208EVB"; 353 mc->init = mcf5208evb_init; 354 mc->is_default = 1; 355 mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5208"); 356 } 357 358 DEFINE_MACHINE("mcf5208evb", mcf5208evb_machine_init) 359