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 "exec/page-protection.h" 19 #include "net/net.h" 20 #include "hw/pci/pci.h" 21 #include "hw/boards.h" 22 #include "sysemu/kvm.h" 23 #include "sysemu/device_tree.h" 24 #include "hw/loader.h" 25 #include "elf.h" 26 #include "hw/char/serial-mm.h" 27 #include "hw/ppc/ppc.h" 28 #include "hw/pci-host/ppc4xx.h" 29 #include "sysemu/sysemu.h" 30 #include "sysemu/reset.h" 31 #include "hw/sysbus.h" 32 #include "hw/intc/ppc-uic.h" 33 #include "hw/qdev-properties.h" 34 #include "qapi/error.h" 35 36 #include <libfdt.h> 37 38 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb" 39 40 /* from u-boot */ 41 #define KERNEL_ADDR 0x1000000 42 #define FDT_ADDR 0x1800000 43 #define RAMDISK_ADDR 0x1900000 44 45 #define PPC440EP_PCI_CONFIG 0xeec00000 46 #define PPC440EP_PCI_INTACK 0xeed00000 47 #define PPC440EP_PCI_SPECIAL 0xeed00000 48 #define PPC440EP_PCI_REGS 0xef400000 49 #define PPC440EP_PCI_IO 0xe8000000 50 #define PPC440EP_PCI_IOLEN 0x00010000 51 52 static hwaddr entry; 53 54 static int bamboo_load_device_tree(MachineState *machine, 55 hwaddr addr, 56 hwaddr initrd_base, 57 hwaddr initrd_size) 58 { 59 int ret = -1; 60 uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) }; 61 char *filename; 62 int fdt_size; 63 void *fdt; 64 uint32_t tb_freq = 400000000; 65 uint32_t clock_freq = 400000000; 66 67 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 68 if (!filename) { 69 return -1; 70 } 71 fdt = load_device_tree(filename, &fdt_size); 72 g_free(filename); 73 if (fdt == NULL) { 74 return -1; 75 } 76 77 /* Manipulate device tree in memory. */ 78 79 ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property, 80 sizeof(mem_reg_property)); 81 if (ret < 0) { 82 fprintf(stderr, "couldn't set /memory/reg\n"); 83 } 84 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start", 85 initrd_base); 86 if (ret < 0) { 87 fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n"); 88 } 89 ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end", 90 (initrd_base + initrd_size)); 91 if (ret < 0) { 92 fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n"); 93 } 94 ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs", 95 machine->kernel_cmdline); 96 if (ret < 0) { 97 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 98 } 99 100 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency", 101 clock_freq); 102 qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency", 103 tb_freq); 104 105 rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr); 106 107 /* Set ms->fdt for 'dumpdtb' QMP/HMP command */ 108 machine->fdt = fdt; 109 110 return 0; 111 } 112 113 /* Create reset TLB entries for BookE, spanning the 32bit addr space. */ 114 static void mmubooke_create_initial_mapping(CPUPPCState *env, 115 target_ulong va, 116 hwaddr pa) 117 { 118 ppcemb_tlb_t *tlb = &env->tlb.tlbe[0]; 119 120 tlb->attr = 0; 121 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 122 tlb->size = 1U << 31; /* up to 0x80000000 */ 123 tlb->EPN = va & TARGET_PAGE_MASK; 124 tlb->RPN = pa & TARGET_PAGE_MASK; 125 tlb->PID = 0; 126 127 tlb = &env->tlb.tlbe[1]; 128 tlb->attr = 0; 129 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 130 tlb->size = 1U << 31; /* up to 0xffffffff */ 131 tlb->EPN = 0x80000000 & TARGET_PAGE_MASK; 132 tlb->RPN = 0x80000000 & TARGET_PAGE_MASK; 133 tlb->PID = 0; 134 } 135 136 static void main_cpu_reset(void *opaque) 137 { 138 PowerPCCPU *cpu = opaque; 139 CPUPPCState *env = &cpu->env; 140 141 cpu_reset(CPU(cpu)); 142 env->gpr[1] = (16 * MiB) - 8; 143 env->gpr[3] = FDT_ADDR; 144 env->nip = entry; 145 146 /* Create a mapping for the kernel. */ 147 mmubooke_create_initial_mapping(env, 0, 0); 148 } 149 150 static void bamboo_init(MachineState *machine) 151 { 152 const char *kernel_filename = machine->kernel_filename; 153 const char *initrd_filename = machine->initrd_filename; 154 MachineClass *mc = MACHINE_GET_CLASS(machine); 155 unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 }; 156 MemoryRegion *address_space_mem = get_system_memory(); 157 MemoryRegion *isa = g_new(MemoryRegion, 1); 158 PCIBus *pcibus; 159 PowerPCCPU *cpu; 160 CPUPPCState *env; 161 target_long initrd_size = 0; 162 DeviceState *dev; 163 DeviceState *uicdev; 164 SysBusDevice *uicsbd; 165 int success; 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, PPC440EP_PCI_CONFIG, 209 qdev_get_gpio_in(uicdev, pci_irq_nrs[0]), 210 qdev_get_gpio_in(uicdev, pci_irq_nrs[1]), 211 qdev_get_gpio_in(uicdev, pci_irq_nrs[2]), 212 qdev_get_gpio_in(uicdev, pci_irq_nrs[3]), 213 NULL); 214 pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0"); 215 if (!pcibus) { 216 error_report("couldn't create PCI controller"); 217 exit(1); 218 } 219 220 memory_region_init_alias(isa, NULL, "isa_mmio", 221 get_system_io(), 0, PPC440EP_PCI_IOLEN); 222 memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa); 223 224 if (serial_hd(0) != NULL) { 225 serial_mm_init(address_space_mem, 0xef600300, 0, 226 qdev_get_gpio_in(uicdev, 0), 227 PPC_SERIAL_MM_BAUDBASE, serial_hd(0), 228 DEVICE_BIG_ENDIAN); 229 } 230 if (serial_hd(1) != NULL) { 231 serial_mm_init(address_space_mem, 0xef600400, 0, 232 qdev_get_gpio_in(uicdev, 1), 233 PPC_SERIAL_MM_BAUDBASE, serial_hd(1), 234 DEVICE_BIG_ENDIAN); 235 } 236 237 if (pcibus) { 238 /* 239 * There are no PCI NICs on the Bamboo board, but there are 240 * PCI slots, so we can pick whatever default model we want. 241 */ 242 pci_init_nic_devices(pcibus, mc->default_nic); 243 } 244 245 /* Load kernel. */ 246 if (kernel_filename) { 247 hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID; 248 success = load_uimage(kernel_filename, &entry, &loadaddr, NULL, 249 NULL, NULL); 250 if (success < 0) { 251 uint64_t elf_entry; 252 success = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry, 253 NULL, NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0); 254 entry = elf_entry; 255 } 256 /* XXX try again as binary */ 257 if (success < 0) { 258 error_report("could not load kernel '%s'", kernel_filename); 259 exit(1); 260 } 261 } 262 263 /* Load initrd. */ 264 if (initrd_filename) { 265 initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR, 266 machine->ram_size - RAMDISK_ADDR); 267 268 if (initrd_size < 0) { 269 error_report("could not load ram disk '%s' at %x", 270 initrd_filename, RAMDISK_ADDR); 271 exit(1); 272 } 273 } 274 275 /* If we're loading a kernel directly, we must load the device tree too. */ 276 if (kernel_filename) { 277 if (bamboo_load_device_tree(machine, FDT_ADDR, 278 RAMDISK_ADDR, initrd_size) < 0) { 279 error_report("couldn't load device tree"); 280 exit(1); 281 } 282 } 283 } 284 285 static void bamboo_machine_init(MachineClass *mc) 286 { 287 mc->desc = "bamboo"; 288 mc->init = bamboo_init; 289 mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("440epb"); 290 mc->default_ram_id = "ppc4xx.sdram"; 291 mc->default_nic = "e1000"; 292 } 293 294 DEFINE_MACHINE("bamboo", bamboo_machine_init) 295