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 #ifdef CONFIG_FDT
  35 static int bamboo_copy_host_cell(void *fdt, const char *node, const char *prop)
  36 {
  37     uint32_t cell;
  38     int ret;
  39
  40     ret = kvmppc_read_host_property(node, prop, &cell, sizeof(cell));
  41     if (ret < 0) {
  42         fprintf(stderr, "couldn't read host %s/%s\n", node, prop);
  43         goto out;
  44     }
  45
  46     ret = qemu_devtree_setprop_cell(fdt, node, prop, cell);
  47     if (ret < 0) {
  48         fprintf(stderr, "couldn't set guest %s/%s\n", node, prop);
  49         goto out;
  50     }
  51
  52 out:
  53     return ret;
  54 }
  55
  56 static void bamboo_fdt_update(void *fdt)
  57 {
  58     /* Copy data from the host device tree into the guest. Since the guest can
  59      * directly access the timebase without host involvement, we must expose
  60      * the correct frequencies. */
  61     bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "clock-frequency");
  62     bamboo_copy_host_cell(fdt, "/cpus/cpu@0", "timebase-frequency");
  63 }
  64 #endif
  65
  66 static int bamboo_load_device_tree(target_phys_addr_t addr,
  67                                      uint32_t ramsize,
  68                                      target_phys_addr_t initrd_base,
  69                                      target_phys_addr_t initrd_size,
  70                                      const char *kernel_cmdline)
  71 {
  72     int ret = -1;
  73 #ifdef CONFIG_FDT
  74     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  75     char *filename;
  76     int fdt_size;
  77     void *fdt;
  78
  79     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  80     if (!filename) {
  81         goto out;
  82     }
  83     fdt = load_device_tree(filename, &fdt_size);
  84     g_free(filename);
  85     if (fdt == NULL) {
  86         goto out;
  87     }
  88
  89     /* Manipulate device tree in memory. */
  90
  91     ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
  92                                sizeof(mem_reg_property));
  93     if (ret < 0)
  94         fprintf(stderr, "couldn't set /memory/reg\n");
  95
  96     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  97                                     initrd_base);
  98     if (ret < 0)
  99         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
 100
 101     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
 102                                     (initrd_base + initrd_size));
 103     if (ret < 0)
 104         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
 105
 106     ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
 107                                       kernel_cmdline);
 108     if (ret < 0)
 109         fprintf(stderr, "couldn't set /chosen/bootargs\n");
 110
 111     if (kvm_enabled()) {
 112         bamboo_fdt_update(fdt);
 113     }
 114
 115     ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
 116     g_free(fdt);
 117
 118 out:
 119 #endif
 120
 121     return ret;
 122 }
 123
 124 static void bamboo_init(ram_addr_t ram_size,
 125                         const char *boot_device,
 126                         const char *kernel_filename,
 127                         const char *kernel_cmdline,
 128                         const char *initrd_filename,
 129                         const char *cpu_model)
 130 {
 131     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
 132     PCIBus *pcibus;
 133     CPUState *env;
 134     uint64_t elf_entry;
 135     uint64_t elf_lowaddr;
 136     target_phys_addr_t entry = 0;
 137     target_phys_addr_t loadaddr = 0;
 138     target_long initrd_size = 0;
 139     int success;
 140     int i;
 141
 142     /* Setup CPU. */
 143     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
 144
 145     if (pcibus) {
 146         /* Register network interfaces. */
 147         for (i = 0; i < nb_nics; i++) {
 148             /* There are no PCI NICs on the Bamboo board, but there are
 149              * PCI slots, so we can pick whatever default model we want. */
 150             pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
 151         }
 152     }
 153
 154     /* Load kernel. */
 155     if (kernel_filename) {
 156         success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 157         if (success < 0) {
 158             success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 159                                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
 160             entry = elf_entry;
 161             loadaddr = elf_lowaddr;
 162         }
 163         /* XXX try again as binary */
 164         if (success < 0) {
 165             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 166                     kernel_filename);
 167             exit(1);
 168         }
 169     }
 170
 171     /* Load initrd. */
 172     if (initrd_filename) {
 173         initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 174                                           ram_size - RAMDISK_ADDR);
 175
 176         if (initrd_size < 0) {
 177             fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
 178                     initrd_filename, RAMDISK_ADDR);
 179             exit(1);
 180         }
 181     }
 182
 183     /* If we're loading a kernel directly, we must load the device tree too. */
 184     if (kernel_filename) {
 185         if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
 186                                     initrd_size, kernel_cmdline) < 0) {
 187             fprintf(stderr, "couldn't load device tree\n");
 188             exit(1);
 189         }
 190
 191         /* Set initial guest state. */
 192         env->gpr[1] = (16<<20) - 8;
 193         env->gpr[3] = FDT_ADDR;
 194         env->nip = entry;
 195         /* XXX we currently depend on KVM to create some initial TLB entries. */
 196     }
 197
 198     if (kvm_enabled())
 199         kvmppc_init();
 200 }
 201
 202 static QEMUMachine bamboo_machine = {
 203     .name = "bamboo-0.13",
 204     .alias = "bamboo",
 205     .desc = "bamboo",
 206     .init = bamboo_init,
 207 };
 208
 209 static QEMUMachine bamboo_machine_v0_12 = {
 210     .name = "bamboo-0.12",
 211     .desc = "bamboo",
 212     .init = bamboo_init,
 213     .compat_props = (GlobalProperty[]) {
 214         {
 215             .driver   = "virtio-serial-pci",
 216             .property = "max_ports",
 217             .value    = stringify(1),
 218         },{
 219             .driver   = "virtio-serial-pci",
 220             .property = "vectors",
 221             .value    = stringify(0),
 222         },
 223         { /* end of list */ }
 224     },
 225 };
 226
 227 static void bamboo_machine_init(void)
 228 {
 229     qemu_register_machine(&bamboo_machine);
 230     qemu_register_machine(&bamboo_machine_v0_12);
 231 }
 232
 233 machine_init(bamboo_machine_init);