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 "config.h" 15 #include "qemu-common.h" 16 #include "net/net.h" 17 #include "hw/hw.h" 18 #include "hw/pci/pci.h" 19 #include "hw/boards.h" 20 #include "sysemu/kvm.h" 21 #include "kvm_ppc.h" 22 #include "sysemu/device_tree.h" 23 #include "hw/loader.h" 24 #include "elf.h" 25 #include "exec/address-spaces.h" 26 #include "hw/char/serial.h" 27 #include "hw/ppc/ppc.h" 28 #include "ppc405.h" 29 #include "sysemu/sysemu.h" 30 #include "hw/sysbus.h" 31 32 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb" 33 34 /* from u-boot */ 35 #define KERNEL_ADDR 0x1000000 36 #define FDT_ADDR 0x1800000 37 #define RAMDISK_ADDR 0x1900000 38 39 #define PPC440EP_PCI_CONFIG 0xeec00000 40 #define PPC440EP_PCI_INTACK 0xeed00000 41 #define PPC440EP_PCI_SPECIAL 0xeed00000 42 #define PPC440EP_PCI_REGS 0xef400000 43 #define PPC440EP_PCI_IO 0xe8000000 44 #define PPC440EP_PCI_IOLEN 0x00010000 45 46 #define PPC440EP_SDRAM_NR_BANKS 4 47 48 static const unsigned int ppc440ep_sdram_bank_sizes[] = { 49 256<<20, 128<<20, 64<<20, 32<<20, 16<<20, 8<<20, 0 50 }; 51 52 static hwaddr entry; 53 54 static int bamboo_load_device_tree(hwaddr addr, 55 uint32_t ramsize, 56 hwaddr initrd_base, 57 hwaddr initrd_size, 58 const char *kernel_cmdline) 59 { 60 int ret = -1; 61 #ifdef CONFIG_FDT 62 uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) }; 63 char *filename; 64 int fdt_size; 65 void *fdt; 66 uint32_t tb_freq = 400000000; 67 uint32_t clock_freq = 400000000; 68 69 filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE); 70 if (!filename) { 71 goto out; 72 } 73 fdt = load_device_tree(filename, &fdt_size); 74 g_free(filename); 75 if (fdt == NULL) { 76 goto out; 77 } 78 79 /* Manipulate device tree in memory. */ 80 81 ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property, 82 sizeof(mem_reg_property)); 83 if (ret < 0) 84 fprintf(stderr, "couldn't set /memory/reg\n"); 85 86 ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start", 87 initrd_base); 88 if (ret < 0) 89 fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n"); 90 91 ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end", 92 (initrd_base + initrd_size)); 93 if (ret < 0) 94 fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n"); 95 96 ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs", 97 kernel_cmdline); 98 if (ret < 0) 99 fprintf(stderr, "couldn't set /chosen/bootargs\n"); 100 101 /* Copy data from the host device tree into the guest. Since the guest can 102 * directly access the timebase without host involvement, we must expose 103 * the correct frequencies. */ 104 if (kvm_enabled()) { 105 tb_freq = kvmppc_get_tbfreq(); 106 clock_freq = kvmppc_get_clockfreq(); 107 } 108 109 qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency", 110 clock_freq); 111 qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency", 112 tb_freq); 113 114 ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr); 115 g_free(fdt); 116 117 out: 118 #endif 119 120 return ret; 121 } 122 123 /* Create reset TLB entries for BookE, spanning the 32bit addr space. */ 124 static void mmubooke_create_initial_mapping(CPUPPCState *env, 125 target_ulong va, 126 hwaddr pa) 127 { 128 ppcemb_tlb_t *tlb = &env->tlb.tlbe[0]; 129 130 tlb->attr = 0; 131 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 132 tlb->size = 1 << 31; /* up to 0x80000000 */ 133 tlb->EPN = va & TARGET_PAGE_MASK; 134 tlb->RPN = pa & TARGET_PAGE_MASK; 135 tlb->PID = 0; 136 137 tlb = &env->tlb.tlbe[1]; 138 tlb->attr = 0; 139 tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4); 140 tlb->size = 1 << 31; /* up to 0xffffffff */ 141 tlb->EPN = 0x80000000 & TARGET_PAGE_MASK; 142 tlb->RPN = 0x80000000 & TARGET_PAGE_MASK; 143 tlb->PID = 0; 144 } 145 146 static void main_cpu_reset(void *opaque) 147 { 148 PowerPCCPU *cpu = opaque; 149 CPUPPCState *env = &cpu->env; 150 151 cpu_reset(CPU(cpu)); 152 env->gpr[1] = (16<<20) - 8; 153 env->gpr[3] = FDT_ADDR; 154 env->nip = entry; 155 156 /* Create a mapping for the kernel. */ 157 mmubooke_create_initial_mapping(env, 0, 0); 158 } 159 160 static void bamboo_init(QEMUMachineInitArgs *args) 161 { 162 ram_addr_t ram_size = args->ram_size; 163 const char *cpu_model = args->cpu_model; 164 const char *kernel_filename = args->kernel_filename; 165 const char *kernel_cmdline = args->kernel_cmdline; 166 const char *initrd_filename = args->initrd_filename; 167 unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 }; 168 MemoryRegion *address_space_mem = get_system_memory(); 169 MemoryRegion *ram_memories 170 = g_malloc(PPC440EP_SDRAM_NR_BANKS * sizeof(*ram_memories)); 171 hwaddr ram_bases[PPC440EP_SDRAM_NR_BANKS]; 172 hwaddr ram_sizes[PPC440EP_SDRAM_NR_BANKS]; 173 qemu_irq *pic; 174 qemu_irq *irqs; 175 PCIBus *pcibus; 176 PowerPCCPU *cpu; 177 CPUPPCState *env; 178 uint64_t elf_entry; 179 uint64_t elf_lowaddr; 180 hwaddr loadaddr = 0; 181 target_long initrd_size = 0; 182 DeviceState *dev; 183 int success; 184 int i; 185 186 /* Setup CPU. */ 187 if (cpu_model == NULL) { 188 cpu_model = "440EP"; 189 } 190 cpu = cpu_ppc_init(cpu_model); 191 if (cpu == NULL) { 192 fprintf(stderr, "Unable to initialize CPU!\n"); 193 exit(1); 194 } 195 env = &cpu->env; 196 197 qemu_register_reset(main_cpu_reset, cpu); 198 ppc_booke_timers_init(cpu, 400000000, 0); 199 ppc_dcr_init(env, NULL, NULL); 200 201 /* interrupt controller */ 202 irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB); 203 irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT]; 204 irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT]; 205 pic = ppcuic_init(env, irqs, 0x0C0, 0, 1); 206 207 /* SDRAM controller */ 208 memset(ram_bases, 0, sizeof(ram_bases)); 209 memset(ram_sizes, 0, sizeof(ram_sizes)); 210 ram_size = ppc4xx_sdram_adjust(ram_size, PPC440EP_SDRAM_NR_BANKS, 211 ram_memories, 212 ram_bases, ram_sizes, 213 ppc440ep_sdram_bank_sizes); 214 /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */ 215 ppc4xx_sdram_init(env, pic[14], PPC440EP_SDRAM_NR_BANKS, ram_memories, 216 ram_bases, ram_sizes, 1); 217 218 /* PCI */ 219 dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST_BRIDGE, 220 PPC440EP_PCI_CONFIG, 221 pic[pci_irq_nrs[0]], pic[pci_irq_nrs[1]], 222 pic[pci_irq_nrs[2]], pic[pci_irq_nrs[3]], 223 NULL); 224 pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0"); 225 if (!pcibus) { 226 fprintf(stderr, "couldn't create PCI controller!\n"); 227 exit(1); 228 } 229 230 isa_mmio_init(PPC440EP_PCI_IO, PPC440EP_PCI_IOLEN); 231 232 if (serial_hds[0] != NULL) { 233 serial_mm_init(address_space_mem, 0xef600300, 0, pic[0], 234 PPC_SERIAL_MM_BAUDBASE, serial_hds[0], 235 DEVICE_BIG_ENDIAN); 236 } 237 if (serial_hds[1] != NULL) { 238 serial_mm_init(address_space_mem, 0xef600400, 0, pic[1], 239 PPC_SERIAL_MM_BAUDBASE, serial_hds[1], 240 DEVICE_BIG_ENDIAN); 241 } 242 243 if (pcibus) { 244 /* Register network interfaces. */ 245 for (i = 0; i < nb_nics; i++) { 246 /* There are no PCI NICs on the Bamboo board, but there are 247 * PCI slots, so we can pick whatever default model we want. */ 248 pci_nic_init_nofail(&nd_table[i], "e1000", NULL); 249 } 250 } 251 252 /* Load kernel. */ 253 if (kernel_filename) { 254 success = load_uimage(kernel_filename, &entry, &loadaddr, NULL); 255 if (success < 0) { 256 success = load_elf(kernel_filename, NULL, NULL, &elf_entry, 257 &elf_lowaddr, NULL, 1, ELF_MACHINE, 0); 258 entry = elf_entry; 259 loadaddr = elf_lowaddr; 260 } 261 /* XXX try again as binary */ 262 if (success < 0) { 263 fprintf(stderr, "qemu: could not load kernel '%s'\n", 264 kernel_filename); 265 exit(1); 266 } 267 } 268 269 /* Load initrd. */ 270 if (initrd_filename) { 271 initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR, 272 ram_size - RAMDISK_ADDR); 273 274 if (initrd_size < 0) { 275 fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n", 276 initrd_filename, RAMDISK_ADDR); 277 exit(1); 278 } 279 } 280 281 /* If we're loading a kernel directly, we must load the device tree too. */ 282 if (kernel_filename) { 283 if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR, 284 initrd_size, kernel_cmdline) < 0) { 285 fprintf(stderr, "couldn't load device tree\n"); 286 exit(1); 287 } 288 } 289 290 if (kvm_enabled()) 291 kvmppc_init(); 292 } 293 294 static QEMUMachine bamboo_machine = { 295 .name = "bamboo", 296 .desc = "bamboo", 297 .init = bamboo_init, 298 DEFAULT_MACHINE_OPTIONS, 299 }; 300 301 static void bamboo_machine_init(void) 302 { 303 qemu_register_machine(&bamboo_machine); 304 } 305 306 machine_init(bamboo_machine_init); 307