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/error-report.h" 17 #include "qemu/datadir.h" 18 #include "qemu/error-report.h" 19 #include "net/net.h" 20 #include "hw/pci/pci.h" 21 #include "hw/boards.h" 22 #include "sysemu/kvm.h" 23 #include "kvm_ppc.h" 24 #include "sysemu/device_tree.h" 25 #include "hw/loader.h" 26 #include "elf.h" 27 #include "hw/char/serial.h" 28 #include "hw/ppc/ppc.h" 29 #include "ppc405.h" 30 #include "sysemu/sysemu.h" 31 #include "sysemu/reset.h" 32 #include "hw/sysbus.h" 33 #include "hw/intc/ppc-uic.h" 34 #include "hw/qdev-properties.h" 35 #include "qapi/error.h" 36 37 #include <libfdt.h> 38 39 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb" 40 41 /* from u-boot */ 42 #define KERNEL_ADDR 0x1000000 43 #define FDT_ADDR 0x1800000 44 #define RAMDISK_ADDR 0x1900000 45 46 #define PPC440EP_PCI_CONFIG 0xeec00000 47 #define PPC440EP_PCI_INTACK 0xeed00000 48 #define PPC440EP_PCI_SPECIAL 0xeed00000 49 #define PPC440EP_PCI_REGS 0xef400000 50 #define PPC440EP_PCI_IO 0xe8000000 51 #define PPC440EP_PCI_IOLEN 0x00010000 52 53 static hwaddr entry; 54 55 static int bamboo_load_device_tree(MachineState *machine, 56 hwaddr addr, 57 hwaddr initrd_base, 58 hwaddr initrd_size) 59 { 60 int ret = -1; 61 uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) }; 62 char *filename; 63 int fdt_size; 64 void *fdt; 65 uint32_t tb_freq = 400000000; 66 uint32_t clock_freq = 400000000; 67 68 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 69 if (!filename) { 70 return -1; 71 } 72 fdt = load_device_tree(filename, &fdt_size); 73 g_free(filename); 74 if (fdt == NULL) { 75 return -1; 76 } 77 78 /* Manipulate device tree in memory. */ 79 80 ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property, 81 sizeof(mem_reg_property)); 82 if (ret < 0) { 83 fprintf(stderr, "couldn't set /memory/reg\n"); 84 } 85 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", 86 initrd_base); 87 if (ret < 0) { 88 fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n"); 89 } 90 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", 91 (initrd_base + initrd_size)); 92 if (ret < 0) { 93 fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n"); 94 } 95 ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", 96 machine->kernel_cmdline); 97 if (ret < 0) { 98 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 99 } 100 101 /* 102 * Copy data from the host device tree into the guest. Since the guest can 103 * directly access the timebase without host involvement, we must expose 104 * the correct frequencies. 105 */ 106 if (kvm_enabled()) { 107 tb_freq = kvmppc_get_tbfreq(); 108 clock_freq = kvmppc_get_clockfreq(); 109 } 110 111 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency", 112 clock_freq); 113 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency", 114 tb_freq); 115 116 rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr); 117 118 /* Set ms->fdt for 'dumpdtb' QMP/HMP command */ 119 machine->fdt = fdt; 120 121 return 0; 122 } 123 124 /* Create reset TLB entries for BookE, spanning the 32bit addr space. */ 125 static void mmubooke_create_initial_mapping(CPUPPCState *env, 126 target_ulong va, 127 hwaddr pa) 128 { 129 ppcemb_tlb_t *tlb = &env->tlb.tlbe[0]; 130 131 tlb->attr = 0; 132 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 133 tlb->size = 1U << 31; /* up to 0x80000000 */ 134 tlb->EPN = va & TARGET_PAGE_MASK; 135 tlb->RPN = pa & TARGET_PAGE_MASK; 136 tlb->PID = 0; 137 138 tlb = &env->tlb.tlbe[1]; 139 tlb->attr = 0; 140 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 141 tlb->size = 1U << 31; /* up to 0xffffffff */ 142 tlb->EPN = 0x80000000 & TARGET_PAGE_MASK; 143 tlb->RPN = 0x80000000 & TARGET_PAGE_MASK; 144 tlb->PID = 0; 145 } 146 147 static void main_cpu_reset(void *opaque) 148 { 149 PowerPCCPU *cpu = opaque; 150 CPUPPCState *env = &cpu->env; 151 152 cpu_reset(CPU(cpu)); 153 env->gpr[1] = (16 * MiB) - 8; 154 env->gpr[3] = FDT_ADDR; 155 env->nip = entry; 156 157 /* Create a mapping for the kernel. */ 158 mmubooke_create_initial_mapping(env, 0, 0); 159 } 160 161 static void bamboo_init(MachineState *machine) 162 { 163 const char *kernel_filename = machine->kernel_filename; 164 const char *initrd_filename = machine->initrd_filename; 165 unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 }; 166 MemoryRegion *address_space_mem = get_system_memory(); 167 MemoryRegion *isa = g_new(MemoryRegion, 1); 168 PCIBus *pcibus; 169 PowerPCCPU *cpu; 170 CPUPPCState *env; 171 target_long initrd_size = 0; 172 DeviceState *dev; 173 DeviceState *uicdev; 174 SysBusDevice *uicsbd; 175 int success; 176 int i; 177 178 cpu = POWERPC_CPU(cpu_create(machine->cpu_type)); 179 env = &cpu->env; 180 181 if (env->mmu_model != POWERPC_MMU_BOOKE) { 182 error_report("MMU model %i not supported by this machine", 183 env->mmu_model); 184 exit(1); 185 } 186 187 qemu_register_reset(main_cpu_reset, cpu); 188 ppc_booke_timers_init(cpu, 400000000, 0); 189 ppc_dcr_init(env, NULL, NULL); 190 191 /* interrupt controller */ 192 uicdev = qdev_new(TYPE_PPC_UIC); 193 ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(uicdev), cpu, &error_fatal); 194 object_unref(OBJECT(uicdev)); 195 uicsbd = SYS_BUS_DEVICE(uicdev); 196 sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_INT, 197 qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_INT)); 198 sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_CINT, 199 qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_CINT)); 200 201 /* SDRAM controller */ 202 dev = qdev_new(TYPE_PPC4xx_SDRAM_DDR); 203 object_property_set_link(OBJECT(dev), "dram", OBJECT(machine->ram), 204 &error_abort); 205 ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal); 206 object_unref(OBJECT(dev)); 207 /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */ 208 sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(uicdev, 14)); 209 /* Enable SDRAM memory regions, this should be done by the firmware */ 210 ppc4xx_sdram_ddr_enable(PPC4xx_SDRAM_DDR(dev)); 211 212 /* PCI */ 213 dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST_BRIDGE, 214 PPC440EP_PCI_CONFIG, 215 qdev_get_gpio_in(uicdev, pci_irq_nrs[0]), 216 qdev_get_gpio_in(uicdev, pci_irq_nrs[1]), 217 qdev_get_gpio_in(uicdev, pci_irq_nrs[2]), 218 qdev_get_gpio_in(uicdev, pci_irq_nrs[3]), 219 NULL); 220 pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0"); 221 if (!pcibus) { 222 error_report("couldn't create PCI controller"); 223 exit(1); 224 } 225 226 memory_region_init_alias(isa, NULL, "isa_mmio", 227 get_system_io(), 0, PPC440EP_PCI_IOLEN); 228 memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa); 229 230 if (serial_hd(0) != NULL) { 231 serial_mm_init(address_space_mem, 0xef600300, 0, 232 qdev_get_gpio_in(uicdev, 0), 233 PPC_SERIAL_MM_BAUDBASE, serial_hd(0), 234 DEVICE_BIG_ENDIAN); 235 } 236 if (serial_hd(1) != NULL) { 237 serial_mm_init(address_space_mem, 0xef600400, 0, 238 qdev_get_gpio_in(uicdev, 1), 239 PPC_SERIAL_MM_BAUDBASE, serial_hd(1), 240 DEVICE_BIG_ENDIAN); 241 } 242 243 if (pcibus) { 244 /* Register network interfaces. */ 245 for (i = 0; i < nb_nics; i++) { 246 /* 247 * There are no PCI NICs on the Bamboo board, but there are 248 * PCI slots, so we can pick whatever default model we want. 249 */ 250 pci_nic_init_nofail(&nd_table[i], pcibus, "e1000", NULL); 251 } 252 } 253 254 /* Load kernel. */ 255 if (kernel_filename) { 256 hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID; 257 success = load_uimage(kernel_filename, &entry, &loadaddr, NULL, 258 NULL, NULL); 259 if (success < 0) { 260 uint64_t elf_entry; 261 success = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry, 262 NULL, NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0); 263 entry = elf_entry; 264 } 265 /* XXX try again as binary */ 266 if (success < 0) { 267 error_report("could not load kernel '%s'", kernel_filename); 268 exit(1); 269 } 270 } 271 272 /* Load initrd. */ 273 if (initrd_filename) { 274 initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR, 275 machine->ram_size - RAMDISK_ADDR); 276 277 if (initrd_size < 0) { 278 error_report("could not load ram disk '%s' at %x", 279 initrd_filename, RAMDISK_ADDR); 280 exit(1); 281 } 282 } 283 284 /* If we're loading a kernel directly, we must load the device tree too. */ 285 if (kernel_filename) { 286 if (bamboo_load_device_tree(machine, FDT_ADDR, 287 RAMDISK_ADDR, initrd_size) < 0) { 288 error_report("couldn't load device tree"); 289 exit(1); 290 } 291 } 292 } 293 294 static void bamboo_machine_init(MachineClass *mc) 295 { 296 mc->desc = "bamboo"; 297 mc->init = bamboo_init; 298 mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("440epb"); 299 mc->default_ram_id = "ppc4xx.sdram"; 300 } 301 302 DEFINE_MACHINE("bamboo", bamboo_machine_init) 303