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 CONFIG_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     CPUState *env;
  94     uint64_t elf_entry;
  95     uint64_t elf_lowaddr;
  96     target_ulong entry = 0;
  97     target_ulong loadaddr = 0;
  98     target_long kernel_size = 0;
  99     target_ulong initrd_base = 0;
 100     target_long initrd_size = 0;
 101     target_ulong dt_base = 0;
 102     void *fdt;
 103     int i;
 104
 105     /* Setup CPU. */
 106     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1, cpu_model);
 107
 108     if (pcibus) {
 109         /* Add virtio console devices */
 110         for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
 111             if (virtcon_hds[i]) {
 112                 pci_create_simple(pcibus, -1, "virtio-console-pci");
 113             }
 114         }
 115
 116         /* Register network interfaces. */
 117         for (i = 0; i < nb_nics; i++) {
 118             /* There are no PCI NICs on the Bamboo board, but there are
 119              * PCI slots, so we can pick whatever default model we want. */
 120             pci_nic_init(&nd_table[i], "e1000", NULL);
 121         }
 122     }
 123
 124     /* Load kernel. */
 125     if (kernel_filename) {
 126         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 127         if (kernel_size < 0) {
 128             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 129                                    NULL);
 130             entry = elf_entry;
 131             loadaddr = elf_lowaddr;
 132         }
 133         /* XXX try again as binary */
 134         if (kernel_size < 0) {
 135             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 136                     kernel_filename);
 137             exit(1);
 138         }
 139     }
 140
 141     /* Load initrd. */
 142     if (initrd_filename) {
 143         initrd_base = kernel_size + loadaddr;
 144         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 145                                           ram_size - initrd_base);
 146
 147         if (initrd_size < 0) {
 148             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 149                     initrd_filename);
 150             exit(1);
 151         }
 152     }
 153
 154     /* If we're loading a kernel directly, we must load the device tree too. */
 155     if (kernel_filename) {
 156         if (initrd_base)
 157             dt_base = initrd_base + initrd_size;
 158         else
 159             dt_base = kernel_size + loadaddr;
 160
 161         fdt = bamboo_load_device_tree(dt_base, ram_size,
 162                                       initrd_base, initrd_size, kernel_cmdline);
 163         if (fdt == NULL) {
 164             fprintf(stderr, "couldn't load device tree\n");
 165             exit(1);
 166         }
 167
 168         /* Set initial guest state. */
 169         env->gpr[1] = (16<<20) - 8;
 170         env->gpr[3] = dt_base;
 171         env->nip = entry;
 172         /* XXX we currently depend on KVM to create some initial TLB entries. */
 173     }
 174
 175     if (kvm_enabled())
 176         kvmppc_init();
 177 }
 178
 179 static QEMUMachine bamboo_machine = {
 180     .name = "bamboo",
 181     .desc = "bamboo",
 182     .init = bamboo_init,
 183 };
 184
 185 static void bamboo_machine_init(void)
 186 {
 187     qemu_register_machine(&bamboo_machine);
 188 }
 189
 190 machine_init(bamboo_machine_init);