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 "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     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_devtree_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_devtree_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_devtree_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_devtree_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_devtree_setprop_cell(fdt, "/cpus/cpu@0", "clock-frequency",
 109                               clock_freq);
 110     qemu_devtree_setprop_cell(fdt, "/cpus/cpu@0", "timebase-frequency",
 111                               tb_freq);
 112
 113     ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 114     g_free(fdt);
 115
 116 out:
 117
 118     return ret;
 119 }
 120
 121 /* Create reset TLB entries for BookE, spanning the 32bit addr space.  */
 122 static void mmubooke_create_initial_mapping(CPUPPCState *env,
 123                                      target_ulong va,
 124                                      hwaddr pa)
 125 {
 126     ppcemb_tlb_t *tlb = &env->tlb.tlbe[0];
 127
 128     tlb->attr = 0;
 129     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 130     tlb->size = 1 << 31; /* up to 0x80000000  */
 131     tlb->EPN = va & TARGET_PAGE_MASK;
 132     tlb->RPN = pa & TARGET_PAGE_MASK;
 133     tlb->PID = 0;
 134
 135     tlb = &env->tlb.tlbe[1];
 136     tlb->attr = 0;
 137     tlb->prot = PAGE_VALID | ((PAGE_READ | PAGE_WRITE | PAGE_EXEC) << 4);
 138     tlb->size = 1 << 31; /* up to 0xffffffff  */
 139     tlb->EPN = 0x80000000 & TARGET_PAGE_MASK;
 140     tlb->RPN = 0x80000000 & TARGET_PAGE_MASK;
 141     tlb->PID = 0;
 142 }
 143
 144 static void main_cpu_reset(void *opaque)
 145 {
 146     PowerPCCPU *cpu = opaque;
 147     CPUPPCState *env = &cpu->env;
 148
 149     cpu_reset(CPU(cpu));
 150     env->gpr[1] = (16<<20) - 8;
 151     env->gpr[3] = FDT_ADDR;
 152     env->nip = entry;
 153
 154     /* Create a mapping for the kernel.  */
 155     mmubooke_create_initial_mapping(env, 0, 0);
 156 }
 157
 158 static void bamboo_init(QEMUMachineInitArgs *args)
 159 {
 160     ram_addr_t ram_size = args->ram_size;
 161     const char *cpu_model = args->cpu_model;
 162     const char *kernel_filename = args->kernel_filename;
 163     const char *kernel_cmdline = args->kernel_cmdline;
 164     const char *initrd_filename = args->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 (cpu_model == NULL) {
 187         cpu_model = "440EP";
 188     }
 189     cpu = cpu_ppc_init(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         if (success < 0) {
 257             success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 258                                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
 259             entry = elf_entry;
 260             loadaddr = elf_lowaddr;
 261         }
 262         /* XXX try again as binary */
 263         if (success < 0) {
 264             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 265                     kernel_filename);
 266             exit(1);
 267         }
 268     }
 269
 270     /* Load initrd. */
 271     if (initrd_filename) {
 272         initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 273                                           ram_size - RAMDISK_ADDR);
 274
 275         if (initrd_size < 0) {
 276             fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
 277                     initrd_filename, RAMDISK_ADDR);
 278             exit(1);
 279         }
 280     }
 281
 282     /* If we're loading a kernel directly, we must load the device tree too. */
 283     if (kernel_filename) {
 284         if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
 285                                     initrd_size, kernel_cmdline) < 0) {
 286             fprintf(stderr, "couldn't load device tree\n");
 287             exit(1);
 288         }
 289     }
 290
 291     if (kvm_enabled())
 292         kvmppc_init();
 293 }
 294
 295 static QEMUMachine bamboo_machine = {
 296     .name = "bamboo",
 297     .desc = "bamboo",
 298     .init = bamboo_init,
 299 };
 300
 301 static void bamboo_machine_init(void)
 302 {
 303     qemu_register_machine(&bamboo_machine);
 304 }
 305
 306 machine_init(bamboo_machine_init);