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 "sysemu.h"
  21 #include "ppc440.h"
  22 #include "kvm.h"
  23 #include "kvm_ppc.h"
  24 #include "device_tree.h"
  25 #include "loader.h"
  26 #include "elf.h"
  27 #include "qemu-kvm.h"
  28
  29 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
  30
  31 /* from u-boot */
  32 #define KERNEL_ADDR  0x1000000
  33 #define FDT_ADDR     0x1800000
  34 #define RAMDISK_ADDR 0x1900000
  35
  36 static int bamboo_load_device_tree(target_phys_addr_t addr,
  37                                      uint32_t ramsize,
  38                                      target_phys_addr_t initrd_base,
  39                                      target_phys_addr_t initrd_size,
  40                                      const char *kernel_cmdline)
  41 {
  42     int ret = -1;
  43 #ifdef CONFIG_FDT
  44     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  45     char *filename;
  46     int fdt_size;
  47     void *fdt;
  48
  49     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  50     if (!filename) {
  51         goto out;
  52     }
  53     fdt = load_device_tree(filename, &fdt_size);
  54     qemu_free(filename);
  55     if (fdt == NULL) {
  56         goto out;
  57     }
  58
  59     /* Manipulate device tree in memory. */
  60
  61     ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
  62                                sizeof(mem_reg_property));
  63     if (ret < 0)
  64         fprintf(stderr, "couldn't set /memory/reg\n");
  65
  66     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  67                                     initrd_base);
  68     if (ret < 0)
  69         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
  70
  71     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
  72                                     (initrd_base + initrd_size));
  73     if (ret < 0)
  74         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
  75
  76     ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
  77                                       kernel_cmdline);
  78     if (ret < 0)
  79         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  80
  81     if (kvm_enabled())
  82         kvmppc_fdt_update(fdt);
  83
  84     ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
  85     qemu_free(fdt);
  86
  87 out:
  88 #endif
  89
  90     return ret;
  91 }
  92
  93 static void bamboo_init(ram_addr_t ram_size,
  94                         const char *boot_device,
  95                         const char *kernel_filename,
  96                         const char *kernel_cmdline,
  97                         const char *initrd_filename,
  98                         const char *cpu_model)
  99 {
 100     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
 101     PCIBus *pcibus;
 102     CPUState *env;
 103     uint64_t elf_entry;
 104     uint64_t elf_lowaddr;
 105     target_phys_addr_t entry = 0;
 106     target_phys_addr_t loadaddr = 0;
 107     target_long initrd_size = 0;
 108     int success;
 109     int i;
 110
 111     /* Setup CPU. */
 112     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
 113
 114     if (pcibus) {
 115         /* Register network interfaces. */
 116         for (i = 0; i < nb_nics; i++) {
 117             /* There are no PCI NICs on the Bamboo board, but there are
 118              * PCI slots, so we can pick whatever default model we want. */
 119             pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
 120         }
 121     }
 122
 123     /* Load kernel. */
 124     if (kernel_filename) {
 125         success = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 126         if (success < 0) {
 127             success = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 128                                &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
 129             entry = elf_entry;
 130             loadaddr = elf_lowaddr;
 131         }
 132         /* XXX try again as binary */
 133         if (success < 0) {
 134             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 135                     kernel_filename);
 136             exit(1);
 137         }
 138     }
 139
 140     /* Load initrd. */
 141     if (initrd_filename) {
 142         initrd_size = load_image_targphys(initrd_filename, RAMDISK_ADDR,
 143                                           ram_size - RAMDISK_ADDR);
 144
 145         if (initrd_size < 0) {
 146             fprintf(stderr, "qemu: could not load ram disk '%s' at %x\n",
 147                     initrd_filename, RAMDISK_ADDR);
 148             exit(1);
 149         }
 150     }
 151
 152     /* If we're loading a kernel directly, we must load the device tree too. */
 153     if (kernel_filename) {
 154         if (bamboo_load_device_tree(FDT_ADDR, ram_size, RAMDISK_ADDR,
 155                                     initrd_size, kernel_cmdline) < 0) {
 156             fprintf(stderr, "couldn't load device tree\n");
 157             exit(1);
 158         }
 159
 160         cpu_synchronize_state(env);
 161
 162         /* Set initial guest state. */
 163         env->gpr[1] = (16<<20) - 8;
 164         env->gpr[3] = FDT_ADDR;
 165         env->nip = entry;
 166         /* XXX we currently depend on KVM to create some initial TLB entries. */
 167     }
 168
 169     if (kvm_enabled())
 170         kvmppc_init();
 171 }
 172
 173 static QEMUMachine bamboo_machine = {
 174     .name = "bamboo-0.13",
 175     .alias = "bamboo",
 176     .desc = "bamboo",
 177     .init = bamboo_init,
 178 };
 179
 180 static QEMUMachine bamboo_machine_v0_12 = {
 181     .name = "bamboo-0.12",
 182     .desc = "bamboo",
 183     .init = bamboo_init,
 184     .compat_props = (GlobalProperty[]) {
 185         {
 186             .driver   = "virtio-serial-pci",
 187             .property = "max_ports",
 188             .value    = stringify(1),
 189         },{
 190             .driver   = "virtio-serial-pci",
 191             .property = "vectors",
 192             .value    = stringify(0),
 193         },
 194         { /* end of list */ }
 195     },
 196 };
 197
 198 static void bamboo_machine_init(void)
 199 {
 200     qemu_register_machine(&bamboo_machine);
 201     qemu_register_machine(&bamboo_machine_v0_12);
 202 }
 203
 204 machine_init(bamboo_machine_init);