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