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 "virtio-blk.h"
  20 #include "boards.h"
  21 #include "sysemu.h"
  22 #include "ppc440.h"
  23 #include "kvm.h"
  24 #include "kvm_ppc.h"
  25 #include "device_tree.h"
  26
  27 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
  28
  29 static void *bamboo_load_device_tree(void *addr,
  30                                      uint32_t ramsize,
  31                                      target_phys_addr_t initrd_base,
  32                                      target_phys_addr_t initrd_size,
  33                                      const char *kernel_cmdline)
  34 {
  35     void *fdt = NULL;
  36 #ifdef HAVE_FDT
  37     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  38     char *path;
  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     if (path == NULL)
  45         return NULL;
  46
  47     snprintf(path, pathlen, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE);
  48
  49     fdt = load_device_tree(path, addr);
  50     free(path);
  51     if (fdt == NULL)
  52         goto out;
  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 out:
  80 #endif
  81
  82     return fdt;
  83 }
  84
  85 static void bamboo_init(ram_addr_t ram_size, int vga_ram_size,
  86                         const char *boot_device, DisplayState *ds,
  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             virtio_blk_init(pcibus, drives_table[i].bdrv);
 115             unit_id++;
 116         }
 117
 118         /* Register network interfaces. */
 119         for (i = 0; i < nb_nics; i++) {
 120             /* There are no PCI NICs on the Bamboo board, but there are
 121              * PCI slots, so we can pick whatever default model we want. */
 122             pci_nic_init(pcibus, &nd_table[i], -1, "e1000");
 123         }
 124     }
 125
 126     /* Load kernel. */
 127     if (kernel_filename) {
 128         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 129         if (kernel_size < 0) {
 130             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 131                                    NULL);
 132             entry = elf_entry;
 133             loadaddr = elf_lowaddr;
 134         }
 135         /* XXX try again as binary */
 136         if (kernel_size < 0) {
 137             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 138                     kernel_filename);
 139             exit(1);
 140         }
 141     }
 142
 143     /* Load initrd. */
 144     if (initrd_filename) {
 145         initrd_base = kernel_size + loadaddr;
 146         initrd_size = load_image(initrd_filename, phys_ram_base + initrd_base);
 147
 148         if (initrd_size < 0) {
 149             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 150                     initrd_filename);
 151             exit(1);
 152         }
 153     }
 154
 155     /* If we're loading a kernel directly, we must load the device tree too. */
 156     if (kernel_filename) {
 157         if (initrd_base)
 158             dt_base = initrd_base + initrd_size;
 159         else
 160             dt_base = kernel_size + loadaddr;
 161
 162         fdt = bamboo_load_device_tree(phys_ram_base + dt_base, ram_size,
 163                                       initrd_base, initrd_size, kernel_cmdline);
 164         if (fdt == NULL) {
 165             fprintf(stderr, "couldn't load device tree\n");
 166             exit(1);
 167         }
 168
 169         /* Set initial guest state. */
 170         env->gpr[1] = (16<<20) - 8;
 171         env->gpr[3] = dt_base;
 172         env->nip = entry;
 173         /* XXX we currently depend on KVM to create some initial TLB entries. */
 174     }
 175
 176     if (kvm_enabled())
 177         kvmppc_init();
 178 }
 179
 180 QEMUMachine bamboo_machine = {
 181     .name = "bamboo",
 182     .desc = "bamboo",
 183     .init = bamboo_init,
 184     .ram_require = 8<<20 | RAMSIZE_FIXED,
 185 };