1 /* 2 * QEMU PowerPC 440 Bamboo board emulation 3 * 4 * Copyright 2007 IBM Corporation. 5 * Authors: 6 * Jerone Young <jyoung5@us.ibm.com> 7 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> 8 * Hollis Blanchard <hollisb@us.ibm.com> 9 * 10 * This work is licensed under the GNU GPL license version 2 or later. 11 * 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qemu/units.h" 16 #include "qemu/datadir.h" 17 #include "qemu/error-report.h" 18 #include "net/net.h" 19 #include "hw/pci/pci.h" 20 #include "hw/boards.h" 21 #include "sysemu/kvm.h" 22 #include "sysemu/device_tree.h" 23 #include "hw/loader.h" 24 #include "elf.h" 25 #include "hw/char/serial.h" 26 #include "hw/ppc/ppc.h" 27 #include "ppc405.h" 28 #include "sysemu/sysemu.h" 29 #include "sysemu/reset.h" 30 #include "hw/sysbus.h" 31 #include "hw/intc/ppc-uic.h" 32 #include "hw/qdev-properties.h" 33 #include "qapi/error.h" 34 35 #include <libfdt.h> 36 37 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb" 38 39 /* from u-boot */ 40 #define KERNEL_ADDR 0x1000000 41 #define FDT_ADDR 0x1800000 42 #define RAMDISK_ADDR 0x1900000 43 44 #define PPC440EP_PCI_CONFIG 0xeec00000 45 #define PPC440EP_PCI_INTACK 0xeed00000 46 #define PPC440EP_PCI_SPECIAL 0xeed00000 47 #define PPC440EP_PCI_REGS 0xef400000 48 #define PPC440EP_PCI_IO 0xe8000000 49 #define PPC440EP_PCI_IOLEN 0x00010000 50 51 static hwaddr entry; 52 53 static int bamboo_load_device_tree(MachineState *machine, 54 hwaddr addr, 55 hwaddr initrd_base, 56 hwaddr initrd_size) 57 { 58 int ret = -1; 59 uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) }; 60 char *filename; 61 int fdt_size; 62 void *fdt; 63 uint32_t tb_freq = 400000000; 64 uint32_t clock_freq = 400000000; 65 66 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 67 if (!filename) { 68 return -1; 69 } 70 fdt = load_device_tree(filename, &fdt_size); 71 g_free(filename); 72 if (fdt == NULL) { 73 return -1; 74 } 75 76 /* Manipulate device tree in memory. */ 77 78 ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property, 79 sizeof(mem_reg_property)); 80 if (ret < 0) { 81 fprintf(stderr, "couldn't set /memory/reg\n"); 82 } 83 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", 84 initrd_base); 85 if (ret < 0) { 86 fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n"); 87 } 88 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", 89 (initrd_base + initrd_size)); 90 if (ret < 0) { 91 fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n"); 92 } 93 ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", 94 machine->kernel_cmdline); 95 if (ret < 0) { 96 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 97 } 98 99 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency", 100 clock_freq); 101 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency", 102 tb_freq); 103 104 rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr); 105 106 /* Set ms->fdt for 'dumpdtb' QMP/HMP command */ 107 machine->fdt = fdt; 108 109 return 0; 110 } 111 112 /* Create reset TLB entries for BookE, spanning the 32bit addr space. */ 113 static void mmubooke_create_initial_mapping(CPUPPCState *env, 114 target_ulong va, 115 hwaddr pa) 116 { 117 ppcemb_tlb_t *tlb = &env->tlb.tlbe[0]; 118 119 tlb->attr = 0; 120 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 121 tlb->size = 1U << 31; /* up to 0x80000000 */ 122 tlb->EPN = va & TARGET_PAGE_MASK; 123 tlb->RPN = pa & TARGET_PAGE_MASK; 124 tlb->PID = 0; 125 126 tlb = &env->tlb.tlbe[1]; 127 tlb->attr = 0; 128 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 129 tlb->size = 1U << 31; /* up to 0xffffffff */ 130 tlb->EPN = 0x80000000 & TARGET_PAGE_MASK; 131 tlb->RPN = 0x80000000 & TARGET_PAGE_MASK; 132 tlb->PID = 0; 133 } 134 135 static void main_cpu_reset(void *opaque) 136 { 137 PowerPCCPU *cpu = opaque; 138 CPUPPCState *env = &cpu->env; 139 140 cpu_reset(CPU(cpu)); 141 env->gpr[1] = (16 * MiB) - 8; 142 env->gpr[3] = FDT_ADDR; 143 env->nip = entry; 144 145 /* Create a mapping for the kernel. */ 146 mmubooke_create_initial_mapping(env, 0, 0); 147 } 148 149 static void bamboo_init(MachineState *machine) 150 { 151 const char *kernel_filename = machine->kernel_filename; 152 const char *initrd_filename = machine->initrd_filename; 153 MachineClass *mc = MACHINE_GET_CLASS(machine); 154 unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 }; 155 MemoryRegion *address_space_mem = get_system_memory(); 156 MemoryRegion *isa = g_new(MemoryRegion, 1); 157 PCIBus *pcibus; 158 PowerPCCPU *cpu; 159 CPUPPCState *env; 160 target_long initrd_size = 0; 161 DeviceState *dev; 162 DeviceState *uicdev; 163 SysBusDevice *uicsbd; 164 int success; 165 int i; 166 167 if (kvm_enabled()) { 168 error_report("machine %s does not support the KVM accelerator", 169 MACHINE_GET_CLASS(machine)->name); 170 exit(EXIT_FAILURE); 171 } 172 173 cpu = POWERPC_CPU(cpu_create(machine->cpu_type)); 174 env = &cpu->env; 175 176 if (env->mmu_model != POWERPC_MMU_BOOKE) { 177 error_report("MMU model %i not supported by this machine", 178 env->mmu_model); 179 exit(1); 180 } 181 182 qemu_register_reset(main_cpu_reset, cpu); 183 ppc_booke_timers_init(cpu, 400000000, 0); 184 ppc_dcr_init(env, NULL, NULL); 185 186 /* interrupt controller */ 187 uicdev = qdev_new(TYPE_PPC_UIC); 188 ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(uicdev), cpu, &error_fatal); 189 object_unref(OBJECT(uicdev)); 190 uicsbd = SYS_BUS_DEVICE(uicdev); 191 sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_INT, 192 qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_INT)); 193 sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_CINT, 194 qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_CINT)); 195 196 /* SDRAM controller */ 197 dev = qdev_new(TYPE_PPC4xx_SDRAM_DDR); 198 object_property_set_link(OBJECT(dev), "dram", OBJECT(machine->ram), 199 &error_abort); 200 ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal); 201 object_unref(OBJECT(dev)); 202 /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */ 203 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(uicdev, 14)); 204 /* Enable SDRAM memory regions, this should be done by the firmware */ 205 ppc4xx_sdram_ddr_enable(PPC4xx_SDRAM_DDR(dev)); 206 207 /* PCI */ 208 dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST_BRIDGE, 209 PPC440EP_PCI_CONFIG, 210 qdev_get_gpio_in(uicdev, pci_irq_nrs[0]), 211 qdev_get_gpio_in(uicdev, pci_irq_nrs[1]), 212 qdev_get_gpio_in(uicdev, pci_irq_nrs[2]), 213 qdev_get_gpio_in(uicdev, pci_irq_nrs[3]), 214 NULL); 215 pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0"); 216 if (!pcibus) { 217 error_report("couldn't create PCI controller"); 218 exit(1); 219 } 220 221 memory_region_init_alias(isa, NULL, "isa_mmio", 222 get_system_io(), 0, PPC440EP_PCI_IOLEN); 223 memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa); 224 225 if (serial_hd(0) != NULL) { 226 serial_mm_init(address_space_mem, 0xef600300, 0, 227 qdev_get_gpio_in(uicdev, 0), 228 PPC_SERIAL_MM_BAUDBASE, serial_hd(0), 229 DEVICE_BIG_ENDIAN); 230 } 231 if (serial_hd(1) != NULL) { 232 serial_mm_init(address_space_mem, 0xef600400, 0, 233 qdev_get_gpio_in(uicdev, 1), 234 PPC_SERIAL_MM_BAUDBASE, serial_hd(1), 235 DEVICE_BIG_ENDIAN); 236 } 237 238 if (pcibus) { 239 /* Register network interfaces. */ 240 for (i = 0; i < nb_nics; i++) { 241 /* 242 * There are no PCI NICs on the Bamboo board, but there are 243 * PCI slots, so we can pick whatever default model we want. 244 */ 245 pci_nic_init_nofail(&nd_table[i], pcibus, mc->default_nic, NULL); 246 } 247 } 248 249 /* Load kernel. */ 250 if (kernel_filename) { 251 hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID; 252 success = load_uimage(kernel_filename, &entry, &loadaddr, NULL, 253 NULL, NULL); 254 if (success < 0) { 255 uint64_t elf_entry; 256 success = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry, 257 NULL, NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0); 258 entry = elf_entry; 259 } 260 /* XXX try again as binary */ 261 if (success < 0) { 262 error_report("could not load kernel '%s'", kernel_filename); 263 exit(1); 264 } 265 } 266 267 /* Load initrd. */ 268 if (initrd_filename) { 269 initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR, 270 machine->ram_size - RAMDISK_ADDR); 271 272 if (initrd_size < 0) { 273 error_report("could not load ram disk '%s' at %x", 274 initrd_filename, RAMDISK_ADDR); 275 exit(1); 276 } 277 } 278 279 /* If we're loading a kernel directly, we must load the device tree too. */ 280 if (kernel_filename) { 281 if (bamboo_load_device_tree(machine, FDT_ADDR, 282 RAMDISK_ADDR, initrd_size) < 0) { 283 error_report("couldn't load device tree"); 284 exit(1); 285 } 286 } 287 } 288 289 static void bamboo_machine_init(MachineClass *mc) 290 { 291 mc->desc = "bamboo"; 292 mc->init = bamboo_init; 293 mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("440epb"); 294 mc->default_ram_id = "ppc4xx.sdram"; 295 mc->default_nic = "e1000"; 296 } 297 298 DEFINE_MACHINE("bamboo", bamboo_machine_init) 299