hw/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.h"
  17 #include "hw.h"
  18 #include "pci.h"
  19 #include "boards.h"
  20 #include "ppc440.h"
  21 #include "kvm.h"
  22 #include "kvm_ppc.h"
  23 #include "device_tree.h"
  24 #include "loader.h"
  25 #include "elf.h"
  26
  27 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
  28
  29 /* from u-boot */
  30 #define KERNEL_ADDR  0x1000000
  31 #define FDT_ADDR     0x1800000
  32 #define RAMDISK_ADDR 0x1900000
  33
  34 static int bamboo_load_device_tree(target_phys_addr_t addr,
  35                                      uint32_t ramsize,
  36                                      target_phys_addr_t initrd_base,
  37                                      target_phys_addr_t initrd_size,
  38                                      const char *kernel_cmdline)
  39 {
  40     int ret = -1;
  41 #ifdef CONFIG_FDT
  42     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  43     char *filename;
  44     int fdt_size;
  45     void *fdt;
  46
  47     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  48     if (!filename) {
  49         goto out;
  50     }
  51     fdt = load_device_tree(filename, &fdt_size);
  52     qemu_free(filename);
  53     if (fdt == NULL) {
  54         goto out;
  55     }
  56
  57     /* Manipulate device tree in memory. */
  58
  59     ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
  60                                sizeof(mem_reg_property));
  61     if (ret < 0)
  62         fprintf(stderr, "couldn't set /memory/reg\n");
  63
  64     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  65                                     initrd_base);
  66     if (ret < 0)
  67         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
  68
  69     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
  70                                     (initrd_base + initrd_size));
  71     if (ret < 0)
  72         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
  73
  74     ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
  75                                       kernel_cmdline);
  76     if (ret < 0)
  77         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  78
  79     if (kvm_enabled())
  80         kvmppc_fdt_update(fdt);
  81
  82     ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
  83     qemu_free(fdt);
  84
  85 out:
  86 #endif
  87
  88     return ret;
  89 }
  90
  91 static void bamboo_init(ram_addr_t ram_size,
  92                         const char *boot_device,
  93                         const char *kernel_filename,
  94                         const char *kernel_cmdline,
  95                         const char *initrd_filename,
  96                         const char *cpu_model)
  97 {
  98     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
  99     PCIBus *pcibus;
 100     CPUState *env;
 101     uint64_t elf_entry;
 102     uint64_t elf_lowaddr;
 103     target_phys_addr_t entry = 0;
 104     target_phys_addr_t loadaddr = 0;
 105     target_long initrd_size = 0;
 106     int success;
 107     int i;
 108
 109     /* Setup CPU. */
 110     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
 111
 112     if (pcibus) {
 113         /* Register network interfaces. */
 114         for (i = 0; i < nb_nics; i++) {
 115             /* There are no PCI NICs on the Bamboo board, but there are
 116              * PCI slots, so we can pick whatever default model we want. */
 117             pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
 118         }
 119     }
 120
 121     /* Load kernel. */
 122     if (kernel_filename) {
 123         success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 124         if (success < 0) {
 125             success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 126                                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
 127             entry = elf_entry;
 128             loadaddr = elf_lowaddr;
 129         }
 130         /* XXX try again as binary */
 131         if (success < 0) {
 132             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 133                     kernel_filename);
 134             exit(1);
 135         }
 136     }
 137
 138     /* Load initrd. */
 139     if (initrd_filename) {
 140         initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 141                                           ram_size - RAMDISK_ADDR);
 142
 143         if (initrd_size < 0) {
 144             fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
 145                     initrd_filename, RAMDISK_ADDR);
 146             exit(1);
 147         }
 148     }
 149
 150     /* If we're loading a kernel directly, we must load the device tree too. */
 151     if (kernel_filename) {
 152         if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
 153                                     initrd_size, kernel_cmdline) < 0) {
 154             fprintf(stderr, "couldn't load device tree\n");
 155             exit(1);
 156         }
 157
 158         /* Set initial guest state. */
 159         env->gpr[1] = (16<<20) - 8;
 160         env->gpr[3] = FDT_ADDR;
 161         env->nip = entry;
 162         /* XXX we currently depend on KVM to create some initial TLB entries. */
 163     }
 164
 165     if (kvm_enabled())
 166         kvmppc_init();
 167 }
 168
 169 static QEMUMachine bamboo_machine = {
 170     .name = "bamboo-0.13",
 171     .alias = "bamboo",
 172     .desc = "bamboo",
 173     .init = bamboo_init,
 174 };
 175
 176 static QEMUMachine bamboo_machine_v0_12 = {
 177     .name = "bamboo-0.12",
 178     .desc = "bamboo",
 179     .init = bamboo_init,
 180     .compat_props = (GlobalProperty[]) {
 181         {
 182             .driver   = "virtio-serial-pci",
 183             .property = "max_ports",
 184             .value    = stringify(1),
 185         },{
 186             .driver   = "virtio-serial-pci",
 187             .property = "vectors",
 188             .value    = stringify(0),
 189         },
 190         { /* end of list */ }
 191     },
 192 };
 193
 194 static void bamboo_machine_init(void)
 195 {
 196     qemu_register_machine(&bamboo_machine);
 197     qemu_register_machine(&bamboo_machine_v0_12);
 198 }
 199
 200 machine_init(bamboo_machine_init);