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 "net/net.h"
  19 #include "hw/pci/pci.h"
  20 #include "hw/boards.h"
  21 #include "sysemu/kvm.h"
  22 #include "sysemu/device_tree.h"
  23 #include "hw/loader.h"
  24 #include "elf.h"
  25 #include "hw/char/serial.h"
  26 #include "hw/ppc/ppc.h"
  27 #include "hw/pci-host/ppc4xx.h"
  28 #include "sysemu/sysemu.h"
  29 #include "sysemu/reset.h"
  30 #include "hw/sysbus.h"
  31 #include "hw/intc/ppc-uic.h"
  32 #include "hw/qdev-properties.h"
  33 #include "qapi/error.h"
  34
  35 #include <libfdt.h>
  36
  37 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
  38
  39 /* from u-boot */
  40 #define KERNEL_ADDR  0x1000000
  41 #define FDT_ADDR     0x1800000
  42 #define RAMDISK_ADDR 0x1900000
  43
  44 #define PPC440EP_PCI_CONFIG     0xeec00000
  45 #define PPC440EP_PCI_INTACK     0xeed00000
  46 #define PPC440EP_PCI_SPECIAL    0xeed00000
  47 #define PPC440EP_PCI_REGS       0xef400000
  48 #define PPC440EP_PCI_IO         0xe8000000
  49 #define PPC440EP_PCI_IOLEN      0x00010000
  50
  51 static hwaddr entry;
  52
  53 static int bamboo_load_device_tree(MachineState *machine,
  54                                    hwaddr addr,
  55                                    hwaddr initrd_base,
  56                                    hwaddr initrd_size)
  57 {
  58     int ret = -1;
  59     uint32_t mem_reg_property[] = { 0, 0, cpu_to_be32(machine->ram_size) };
  60     char *filename;
  61     int fdt_size;
  62     void *fdt;
  63     uint32_t tb_freq = 400000000;
  64     uint32_t clock_freq = 400000000;
  65
  66     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  67     if (!filename) {
  68         return -1;
  69     }
  70     fdt = load_device_tree(filename, &fdt_size);
  71     g_free(filename);
  72     if (fdt == NULL) {
  73         return -1;
  74     }
  75
  76     /* Manipulate device tree in memory. */
  77
  78     ret = qemu_fdt_setprop(fdt, "/memory", "reg", mem_reg_property,
  79                            sizeof(mem_reg_property));
  80     if (ret < 0) {
  81         fprintf(stderr, "couldn't set /memory/reg\n");
  82     }
  83     ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  84                                 initrd_base);
  85     if (ret < 0) {
  86         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
  87     }
  88     ret = qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",
  89                                 (initrd_base + initrd_size));
  90     if (ret < 0) {
  91         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
  92     }
  93     ret = qemu_fdt_setprop_string(fdt, "/chosen", "bootargs",
  94                                   machine->kernel_cmdline);
  95     if (ret < 0) {
  96         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  97     }
  98
  99     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
 100                           clock_freq);
 101     qemu_fdt_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
 102                           tb_freq);
 103
 104     rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 105
 106     /* Set ms->fdt for 'dumpdtb' QMP/HMP command */
 107     machine->fdt = fdt;
 108
 109     return 0;
 110 }
 111
 112 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
 113 static void mmubooke_create_initial_mapping(CPUPPCState *env,
 114                                      target_ulong va,
 115                                      hwaddr pa)
 116 {
 117     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 118
 119     tlb->attr = 0;
 120     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 121     tlb->size = 1U << 31; /* up to 0x80000000  */
 122     tlb->EPN = va & TARGET_PAGE_MASK;
 123     tlb->RPN = pa & TARGET_PAGE_MASK;
 124     tlb->PID = 0;
 125
 126     tlb = &env->tlb.tlbe[1];
 127     tlb->attr = 0;
 128     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 129     tlb->size = 1U << 31; /* up to 0xffffffff  */
 130     tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
 131     tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
 132     tlb->PID = 0;
 133 }
 134
 135 static void main_cpu_reset(void *opaque)
 136 {
 137     PowerPCCPU *cpu = opaque;
 138     CPUPPCState *env = &cpu->env;
 139
 140     cpu_reset(CPU(cpu));
 141     env->gpr[1] = (16 * MiB) - 8;
 142     env->gpr[3] = FDT_ADDR;
 143     env->nip = entry;
 144
 145     /* Create a mapping for the kernel.  */
 146     mmubooke_create_initial_mapping(env, 0, 0);
 147 }
 148
 149 static void bamboo_init(MachineState *machine)
 150 {
 151     const char *kernel_filename = machine->kernel_filename;
 152     const char *initrd_filename = machine->initrd_filename;
 153     MachineClass *mc = MACHINE_GET_CLASS(machine);
 154     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
 155     MemoryRegion *address_space_mem = get_system_memory();
 156     MemoryRegion *isa = g_new(MemoryRegion, 1);
 157     PCIBus *pcibus;
 158     PowerPCCPU *cpu;
 159     CPUPPCState *env;
 160     target_long initrd_size = 0;
 161     DeviceState *dev;
 162     DeviceState *uicdev;
 163     SysBusDevice *uicsbd;
 164     int success;
 165
 166     if (kvm_enabled()) {
 167         error_report("machine %s does not support the KVM accelerator",
 168                      MACHINE_GET_CLASS(machine)->name);
 169         exit(EXIT_FAILURE);
 170     }
 171
 172     cpu = POWERPC_CPU(cpu_create(machine->cpu_type));
 173     env = &cpu->env;
 174
 175     if (env->mmu_model != POWERPC_MMU_BOOKE) {
 176         error_report("MMU model %i not supported by this machine",
 177                      env->mmu_model);
 178         exit(1);
 179     }
 180
 181     qemu_register_reset(main_cpu_reset, cpu);
 182     ppc_booke_timers_init(cpu, 400000000, 0);
 183     ppc_dcr_init(env, NULL, NULL);
 184
 185     /* interrupt controller */
 186     uicdev = qdev_new(TYPE_PPC_UIC);
 187     ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(uicdev), cpu, &error_fatal);
 188     object_unref(OBJECT(uicdev));
 189     uicsbd = SYS_BUS_DEVICE(uicdev);
 190     sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_INT,
 191                        qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_INT));
 192     sysbus_connect_irq(uicsbd, PPCUIC_OUTPUT_CINT,
 193                        qdev_get_gpio_in(DEVICE(cpu), PPC40x_INPUT_CINT));
 194
 195     /* SDRAM controller */
 196     dev = qdev_new(TYPE_PPC4xx_SDRAM_DDR);
 197     object_property_set_link(OBJECT(dev), "dram", OBJECT(machine->ram),
 198                              &error_abort);
 199     ppc4xx_dcr_realize(PPC4xx_DCR_DEVICE(dev), cpu, &error_fatal);
 200     object_unref(OBJECT(dev));
 201     /* XXX 440EP's ECC interrupts are on UIC1, but we've only created UIC0. */
 202     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, qdev_get_gpio_in(uicdev, 14));
 203     /* Enable SDRAM memory regions, this should be done by the firmware */
 204     ppc4xx_sdram_ddr_enable(PPC4xx_SDRAM_DDR(dev));
 205
 206     /* PCI */
 207     dev = sysbus_create_varargs(TYPE_PPC4xx_PCI_HOST, PPC440EP_PCI_CONFIG,
 208                                 qdev_get_gpio_in(uicdev, pci_irq_nrs[0]),
 209                                 qdev_get_gpio_in(uicdev, pci_irq_nrs[1]),
 210                                 qdev_get_gpio_in(uicdev, pci_irq_nrs[2]),
 211                                 qdev_get_gpio_in(uicdev, pci_irq_nrs[3]),
 212                                 NULL);
 213     pcibus = (PCIBus *)qdev_get_child_bus(dev, "pci.0");
 214     if (!pcibus) {
 215         error_report("couldn't create PCI controller");
 216         exit(1);
 217     }
 218
 219     memory_region_init_alias(isa, NULL, "isa_mmio",
 220                              get_system_io(), 0, PPC440EP_PCI_IOLEN);
 221     memory_region_add_subregion(get_system_memory(), PPC440EP_PCI_IO, isa);
 222
 223     if (serial_hd(0) != NULL) {
 224         serial_mm_init(address_space_mem, 0xef600300, 0,
 225                        qdev_get_gpio_in(uicdev, 0),
 226                        PPC_SERIAL_MM_BAUDBASE, serial_hd(0),
 227                        DEVICE_BIG_ENDIAN);
 228     }
 229     if (serial_hd(1) != NULL) {
 230         serial_mm_init(address_space_mem, 0xef600400, 0,
 231                        qdev_get_gpio_in(uicdev, 1),
 232                        PPC_SERIAL_MM_BAUDBASE, serial_hd(1),
 233                        DEVICE_BIG_ENDIAN);
 234     }
 235
 236     if (pcibus) {
 237         /*
 238          * There are no PCI NICs on the Bamboo board, but there are
 239          * PCI slots, so we can pick whatever default model we want.
 240          */
 241         pci_init_nic_devices(pcibus, mc->default_nic);
 242     }
 243
 244     /* Load kernel. */
 245     if (kernel_filename) {
 246         hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
 247         success = load_uimage(kernel_filename, &entry, &loadaddr, NULL,
 248                               NULL, NULL);
 249         if (success < 0) {
 250             uint64_t elf_entry;
 251             success = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
 252                                NULL, NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
 253             entry = elf_entry;
 254         }
 255         /* XXX try again as binary */
 256         if (success < 0) {
 257             error_report("could not load kernel '%s'", kernel_filename);
 258             exit(1);
 259         }
 260     }
 261
 262     /* Load initrd. */
 263     if (initrd_filename) {
 264         initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 265                                           machine->ram_size - RAMDISK_ADDR);
 266
 267         if (initrd_size < 0) {
 268             error_report("could not load ram disk '%s' at %x",
 269                          initrd_filename, RAMDISK_ADDR);
 270             exit(1);
 271         }
 272     }
 273
 274     /* If we're loading a kernel directly, we must load the device tree too. */
 275     if (kernel_filename) {
 276         if (bamboo_load_device_tree(machine, FDT_ADDR,
 277                                     RAMDISK_ADDR, initrd_size) < 0) {
 278             error_report("couldn't load device tree");
 279             exit(1);
 280         }
 281     }
 282 }
 283
 284 static void bamboo_machine_init(MachineClass *mc)
 285 {
 286     mc->desc = "bamboo";
 287     mc->init = bamboo_init;
 288     mc->default_cpu_type = POWERPC_CPU_TYPE_NAME("440epb");
 289     mc->default_ram_id = "ppc4xx.sdram";
 290     mc->default_nic = "e1000";
 291 }
 292
 293 DEFINE_MACHINE("bamboo", bamboo_machine_init)