hw/ppc/ppc440_bamboo.c

   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.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)