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