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 int 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     int ret = -1;
  38 #ifdef CONFIG_FDT
  39     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  40     char *filename;
  41     int fdt_size;
  42     void *fdt;
  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     ret = rom_add_blob_fixed(BINARY_DEVICE_TREE_FILE, fdt, fdt_size, addr);
  80     qemu_free(fdt);
  81
  82 out:
  83 #endif
  84
  85     return ret;
  86 }
  87
  88 static void bamboo_init(ram_addr_t ram_size,
  89                         const char *boot_device,
  90                         const char *kernel_filename,
  91                         const char *kernel_cmdline,
  92                         const char *initrd_filename,
  93                         const char *cpu_model)
  94 {
  95     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
  96     PCIBus *pcibus;
  97     CPUState *env;
  98     uint64_t elf_entry;
  99     uint64_t elf_lowaddr;
 100     target_phys_addr_t entry = 0;
 101     target_phys_addr_t loadaddr = 0;
 102     target_long kernel_size = 0;
 103     target_ulong initrd_base = 0;
 104     target_long initrd_size = 0;
 105     target_ulong dt_base = 0;
 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         /* Register network interfaces. */
 113         for (i = 0; i < nb_nics; i++) {
 114             /* There are no PCI NICs on the Bamboo board, but there are
 115              * PCI slots, so we can pick whatever default model we want. */
 116             pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
 117         }
 118     }
 119
 120     /* Load kernel. */
 121     if (kernel_filename) {
 122         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 123         if (kernel_size < 0) {
 124             kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
 125                                    &elf_lowaddr, NULL, 1, ELF_MACHINE, 0);
 126             entry = elf_entry;
 127             loadaddr = elf_lowaddr;
 128         }
 129         /* XXX try again as binary */
 130         if (kernel_size < 0) {
 131             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 132                     kernel_filename);
 133             exit(1);
 134         }
 135     }
 136
 137     /* Load initrd. */
 138     if (initrd_filename) {
 139         initrd_base = kernel_size + loadaddr;
 140         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 141                                           ram_size - initrd_base);
 142
 143         if (initrd_size < 0) {
 144             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 145                     initrd_filename);
 146             exit(1);
 147         }
 148     }
 149
 150     /* If we're loading a kernel directly, we must load the device tree too. */
 151     if (kernel_filename) {
 152         if (initrd_base)
 153             dt_base = initrd_base + initrd_size;
 154         else
 155             dt_base = kernel_size + loadaddr;
 156
 157         if (bamboo_load_device_tree(dt_base, ram_size,
 158                         initrd_base, initrd_size, kernel_cmdline) < 0) {
 159             fprintf(stderr, "couldn't load device tree\n");
 160             exit(1);
 161         }
 162
 163         cpu_synchronize_state(env);
 164
 165         /* Set initial guest state. */
 166         env->gpr[1] = (16<<20) - 8;
 167         env->gpr[3] = dt_base;
 168         env->nip = entry;
 169         /* XXX we currently depend on KVM to create some initial TLB entries. */
 170     }
 171
 172     if (kvm_enabled())
 173         kvmppc_init();
 174 }
 175
 176 static QEMUMachine bamboo_machine = {
 177     .name = "bamboo-0.13",
 178     .alias = "bamboo",
 179     .desc = "bamboo",
 180     .init = bamboo_init,
 181 };
 182
 183 static QEMUMachine bamboo_machine_v0_12 = {
 184     .name = "bamboo-0.12",
 185     .desc = "bamboo",
 186     .init = bamboo_init,
 187     .compat_props = (GlobalProperty[]) {
 188         {
 189             .driver   = "virtio-serial-pci",
 190             .property = "max_nr_ports",
 191             .value    = stringify(1),
 192         },{
 193             .driver   = "virtio-serial-pci",
 194             .property = "vectors",
 195             .value    = stringify(0),
 196         },
 197         { /* end of list */ }
 198     },
 199 };
 200
 201 static void bamboo_machine_init(void)
 202 {
 203     qemu_register_machine(&bamboo_machine);
 204     qemu_register_machine(&bamboo_machine_v0_12);
 205 }
 206
 207 machine_init(bamboo_machine_init);