qemu/hw/ppc/ppc440_bamboo.c
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   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
  48static const unsigned int ppc440ep_sdram_bank_sizes[] = {
  49    256<<20, 128<<20, 64<<20, 32<<20, 16<<20, 8<<20, 0
  50};
  51
  52static hwaddr entry;
  53
  54static 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    uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(ramsize) };
  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        goto out;
  71    }
  72    fdt = load_device_tree(filename, &fdt_size);
  73    g_free(filename);
  74    if (fdt == NULL) {
  75        goto out;
  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                                  kernel_cmdline);
  97    if (ret < 0)
  98        fprintf(stderr, "couldn't set /chosen/bootargs\n");
  99
 100    /* Copy data from the host device tree into the guest. Since the guest can
 101     * directly access the timebase without host involvement, we must expose
 102     * the correct frequencies. */
 103    if (kvm_enabled()) {
 104        tb_freq = kvmppc_get_tbfreq();
 105        clock_freq = kvmppc_get_clockfreq();
 106    }
 107
 108    qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
 109                          clock_freq);
 110    qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
 111                          tb_freq);
 112
 113    rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 114    g_free(fdt);
 115    return 0;
 116
 117out:
 118
 119    return ret;
 120}
 121
 122/* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
 123static void mmubooke_create_initial_mapping(CPUPPCState *env,
 124                                     target_ulong va,
 125                                     hwaddr pa)
 126{
 127    ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 128
 129    tlb->attr = 0;
 130    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 131    tlb->size = 1U << 31; /* up to 0x80000000  */
 132    tlb->EPN = va & TARGET_PAGE_MASK;
 133    tlb->RPN = pa & TARGET_PAGE_MASK;
 134    tlb->PID = 0;
 135
 136    tlb = &env->tlb.tlbe[1];
 137    tlb->attr = 0;
 138    tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 139    tlb->size = 1U << 31; /* up to 0xffffffff  */
 140    tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
 141    tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
 142    tlb->PID = 0;
 143}
 144
 145static void main_cpu_reset(void *opaque)
 146{
 147    PowerPCCPU *cpu = opaque;
 148    CPUPPCState *env = &cpu->env;
 149
 150    cpu_reset(CPU(cpu));
 151    env->gpr[1] = (16<<20) - 8;
 152    env->gpr[3] = FDT_ADDR;
 153    env->nip = entry;
 154
 155    /* Create a mapping for the kernel.  */
 156    mmubooke_create_initial_mapping(env, 0, 0);
 157}
 158
 159static void bamboo_init(MachineState *machine)
 160{
 161    ram_addr_t ram_size = machine->ram_size;
 162    const char *kernel_filename = machine->kernel_filename;
 163    const char *kernel_cmdline = machine->kernel_cmdline;
 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    MemoryRegion *ram_memories
 169        = g_malloc(PPC440EP_SDRAM_NR_BANKS * sizeof(*ram_memories));
 170    hwaddr ram_bases[PPC440EP_SDRAM_NR_BANKS];
 171    hwaddr ram_sizes[PPC440EP_SDRAM_NR_BANKS];
 172    qemu_irq *pic;
 173    qemu_irq *irqs;
 174    PCIBus *pcibus;
 175    PowerPCCPU *cpu;
 176    CPUPPCState *env;
 177    uint64_t elf_entry;
 178    uint64_t elf_lowaddr;
 179    hwaddr loadaddr = 0;
 180    target_long initrd_size = 0;
 181    DeviceState *dev;
 182    int success;
 183    int i;
 184
 185    /* Setup CPU. */
 186    if (machine->cpu_model == NULL) {
 187        machine->cpu_model = "440EP";
 188    }
 189    cpu = cpu_ppc_init(machine->cpu_model);
 190    if (cpu == NULL) {
 191        fprintf(stderr, "Unable to initialize CPU!\n");
 192        exit(1);
 193    }
 194    env = &cpu->env;
 195
 196    qemu_register_reset(main_cpu_reset, cpu);
 197    ppc_booke_timers_init(cpu, 400000000, 0);
 198    ppc_dcr_init(env, NULL, NULL);
 199
 200    /* interrupt controller */
 201    irqs = g_malloc0(sizeof(qemu_irq) * PPCUIC_OUTPUT_NB);
 202    irqs[PPCUIC_OUTPUT_INT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_INT];
 203    irqs[PPCUIC_OUTPUT_CINT] = ((qemu_irq *)env->irq_inputs)[PPC40x_INPUT_CINT];
 204    pic = ppcuic_init(env, irqs, 0x0C0, 0, 1);
 205
 206    /* SDRAM controller */
 207    memset(ram_bases, 0, sizeof(ram_bases));
 208    memset(ram_sizes, 0, sizeof(ram_sizes));
 209    ram_size = ppc4xx_sdram_adjust(ram_size, PPC440EP_SDRAM_NR_BANKS,
 210                                   ram_memories,
 211                                   ram_bases, ram_sizes,
 212                                   ppc440ep_sdram_bank_sizes);
 213    /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */
 214    ppc4xx_sdram_init(env, pic[14], PPC440EP_SDRAM_NR_BANKS, ram_memories,
 215                      ram_bases, ram_sizes, 1);
 216
 217    /* PCI */
 218    dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST_BRIDGE,
 219                                PPC440EP_PCI_CONFIG,
 220                                pic[pci_irq_nrs[0]], pic[pci_irq_nrs[1]],
 221                                pic[pci_irq_nrs[2]], pic[pci_irq_nrs[3]],
 222                                NULL);
 223    pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
 224    if (!pcibus) {
 225        fprintf(stderr, "couldn't create PCI controller!\n");
 226        exit(1);
 227    }
 228
 229    memory_region_init_alias(isa, NULL, "isa_mmio",
 230                             get_system_io(), 0, PPC440EP_PCI_IOLEN);
 231    memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa);
 232
 233    if (serial_hds[0] != NULL) {
 234        serial_mm_init(address_space_mem, 0xef600300, 0, pic[0],
 235                       PPC_SERIAL_MM_BAUDBASE, serial_hds[0],
 236                       DEVICE_BIG_ENDIAN);
 237    }
 238    if (serial_hds[1] != NULL) {
 239        serial_mm_init(address_space_mem, 0xef600400, 0, pic[1],
 240                       PPC_SERIAL_MM_BAUDBASE, serial_hds[1],
 241                       DEVICE_BIG_ENDIAN);
 242    }
 243
 244    if (pcibus) {
 245        /* Register network interfaces. */
 246        for (i = 0; i < nb_nics; i++) {
 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            pci_nic_init_nofail(&nd_table[i], pcibus, "e1000", NULL);
 250        }
 251    }
 252
 253    /* Load kernel. */
 254    if (kernel_filename) {
 255        success = load_uimage(kernel_filename, &entry, &loadaddr, NULL,
 256                              NULL, NULL);
 257        if (success < 0) {
 258            success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 259                               &elf_lowaddr, NULL, 1, PPC_ELF_MACHINE, 0);
 260            entry = elf_entry;
 261            loadaddr = elf_lowaddr;
 262        }
 263        /* XXX try again as binary */
 264        if (success < 0) {
 265            fprintf(stderr, "qemu: could not load kernel '%s'\n",
 266                    kernel_filename);
 267            exit(1);
 268        }
 269    }
 270
 271    /* Load initrd. */
 272    if (initrd_filename) {
 273        initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 274                                          ram_size - RAMDISK_ADDR);
 275
 276        if (initrd_size < 0) {
 277            fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
 278                    initrd_filename, RAMDISK_ADDR);
 279            exit(1);
 280        }
 281    }
 282
 283    /* If we're loading a kernel directly, we must load the device tree too. */
 284    if (kernel_filename) {
 285        if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
 286                                    initrd_size, kernel_cmdline) < 0) {
 287            fprintf(stderr, "couldn't load device tree\n");
 288            exit(1);
 289        }
 290    }
 291}
 292
 293static void bamboo_machine_init(MachineClass *mc)
 294{
 295    mc->desc = "bamboo";
 296    mc->init = bamboo_init;
 297}
 298
 299DEFINE_MACHINE("bamboo", bamboo_machine_init)
 300