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