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 *filename;
  38     int fdt_size;
  39     int ret;
  40
  41     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, BINARY_DEVICE_TREE_FILE);
  42     if (!filename) {
  43         goto out;
  44     }
  45     fdt = load_device_tree(filename, &fdt_size);
  46     qemu_free(filename);
  47     if (fdt == NULL) {
  48         goto out;
  49     }
  50
  51     /* Manipulate device tree in memory. */
  52
  53     ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
  54                                sizeof(mem_reg_property));
  55     if (ret < 0)
  56         fprintf(stderr, "couldn't set /memory/reg\n");
  57
  58     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  59                                     initrd_base);
  60     if (ret < 0)
  61         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
  62
  63     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
  64                                     (initrd_base + initrd_size));
  65     if (ret < 0)
  66         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
  67
  68     ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
  69                                       kernel_cmdline);
  70     if (ret < 0)
  71         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  72
  73     if (kvm_enabled())
  74         kvmppc_fdt_update(fdt);
  75
  76     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  77
  78 out:
  79 #endif
  80
  81     return fdt;
  82 }
  83
  84 static void bamboo_init(ram_addr_t ram_size,
  85                         const char *boot_device,
  86                         const char *kernel_filename,
  87                         const char *kernel_cmdline,
  88                         const char *initrd_filename,
  89                         const char *cpu_model)
  90 {
  91     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
  92     PCIBus *pcibus;
  93     PCIDevice *pci_dev;
  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     DriveInfo *dinfo;
 106
 107     /* Setup CPU. */
 108     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
 109
 110     if (pcibus) {
 111         int unit_id = 0;
 112
 113         /* Add virtio block devices. */
 114         while ((dinfo = drive_get(IF_VIRTIO, 0, unit_id)) != NULL) {
 115             pci_dev = pci_create("virtio-blk-pci", dinfo->devaddr);
 116             qdev_init(&pci_dev->qdev);
 117             unit_id++;
 118         }
 119
 120         /* Add virtio console devices */
 121         for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
 122             if (virtcon_hds[i]) {
 123                 pci_create_simple(pcibus, -1, "virtio-console-pci");
 124             }
 125         }
 126
 127         /* Register network interfaces. */
 128         for (i = 0; i < nb_nics; i++) {
 129             /* There are no PCI NICs on the Bamboo board, but there are
 130              * PCI slots, so we can pick whatever default model we want. */
 131             pci_nic_init(&nd_table[i], "e1000", NULL);
 132         }
 133     }
 134
 135     /* Load kernel. */
 136     if (kernel_filename) {
 137         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 138         if (kernel_size < 0) {
 139             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 140                                    NULL);
 141             entry = elf_entry;
 142             loadaddr = elf_lowaddr;
 143         }
 144         /* XXX try again as binary */
 145         if (kernel_size < 0) {
 146             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 147                     kernel_filename);
 148             exit(1);
 149         }
 150     }
 151
 152     /* Load initrd. */
 153     if (initrd_filename) {
 154         initrd_base = kernel_size + loadaddr;
 155         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 156                                           ram_size - initrd_base);
 157
 158         if (initrd_size < 0) {
 159             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 160                     initrd_filename);
 161             exit(1);
 162         }
 163     }
 164
 165     /* If we're loading a kernel directly, we must load the device tree too. */
 166     if (kernel_filename) {
 167         if (initrd_base)
 168             dt_base = initrd_base + initrd_size;
 169         else
 170             dt_base = kernel_size + loadaddr;
 171
 172         fdt = bamboo_load_device_tree(dt_base, ram_size,
 173                                       initrd_base, initrd_size, kernel_cmdline);
 174         if (fdt == NULL) {
 175             fprintf(stderr, "couldn't load device tree\n");
 176             exit(1);
 177         }
 178
 179         /* Set initial guest state. */
 180         env->gpr[1] = (16<<20) - 8;
 181         env->gpr[3] = dt_base;
 182         env->nip = entry;
 183         /* XXX we currently depend on KVM to create some initial TLB entries. */
 184     }
 185
 186     if (kvm_enabled())
 187         kvmppc_init();
 188 }
 189
 190 static QEMUMachine bamboo_machine = {
 191     .name = "bamboo",
 192     .desc = "bamboo",
 193     .init = bamboo_init,
 194 };
 195
 196 static void bamboo_machine_init(void)
 197 {
 198     qemu_register_machine(&bamboo_machine);
 199 }
 200
 201 machine_init(bamboo_machine_init);