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 "virtio-console.h"
  21 #include "boards.h"
  22 #include "sysemu.h"
  23 #include "ppc440.h"
  24 #include "kvm.h"
  25 #include "kvm_ppc.h"
  26 #include "device_tree.h"
  27
  28 #define BINARY_DEVICE_TREE_FILE "bamboo.dtb"
  29
  30 static void *bamboo_load_device_tree(void *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 HAVE_FDT
  38     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  39     char *path;
  40     int pathlen;
  41     int ret;
  42
  43     pathlen = snprintf(NULL, 0, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE) + 1;
  44     path = qemu_malloc(pathlen);
  45
  46     snprintf(path, pathlen, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE);
  47
  48     fdt = load_device_tree(path, addr);
  49     free(path);
  50     if (fdt == NULL)
  51         goto out;
  52
  53     /* Manipulate device tree in memory. */
  54
  55     ret = qemu_devtree_setprop(fdt, "/memory", "reg", mem_reg_property,
  56                                sizeof(mem_reg_property));
  57     if (ret < 0)
  58         fprintf(stderr, "couldn't set /memory/reg\n");
  59
  60     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-start",
  61                                     initrd_base);
  62     if (ret < 0)
  63         fprintf(stderr, "couldn't set /chosen/linux,initrd-start\n");
  64
  65     ret = qemu_devtree_setprop_cell(fdt, "/chosen", "linux,initrd-end",
  66                                     (initrd_base + initrd_size));
  67     if (ret < 0)
  68         fprintf(stderr, "couldn't set /chosen/linux,initrd-end\n");
  69
  70     ret = qemu_devtree_setprop_string(fdt, "/chosen", "bootargs",
  71                                       kernel_cmdline);
  72     if (ret < 0)
  73         fprintf(stderr, "couldn't set /chosen/bootargs\n");
  74
  75     if (kvm_enabled())
  76         kvmppc_fdt_update(fdt);
  77
  78 out:
  79 #endif
  80
  81     return fdt;
  82 }
  83
  84 static void bamboo_init(ram_addr_t ram_size, int vga_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);
 107
 108     if (pcibus) {
 109         int unit_id = 0;
 110
 111         /* Add virtio block devices. */
 112         while ((i = drive_get_index(IF_VIRTIO, 0, unit_id)) != -1) {
 113             virtio_blk_init(pcibus, drives_table[i].bdrv);
 114             unit_id++;
 115         }
 116
 117         /* Add virtio console devices */
 118         for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
 119             if (virtcon_hds[i])
 120                 virtio_console_init(pcibus, virtcon_hds[i]);
 121         }
 122
 123         /* Register network interfaces. */
 124         for (i = 0; i < nb_nics; i++) {
 125             /* There are no PCI NICs on the Bamboo board, but there are
 126              * PCI slots, so we can pick whatever default model we want. */
 127             pci_nic_init(pcibus, &nd_table[i], -1, "e1000");
 128         }
 129     }
 130
 131     /* Load kernel. */
 132     if (kernel_filename) {
 133         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 134         if (kernel_size < 0) {
 135             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 136                                    NULL);
 137             entry = elf_entry;
 138             loadaddr = elf_lowaddr;
 139         }
 140         /* XXX try again as binary */
 141         if (kernel_size < 0) {
 142             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 143                     kernel_filename);
 144             exit(1);
 145         }
 146     }
 147
 148     /* Load initrd. */
 149     if (initrd_filename) {
 150         initrd_base = kernel_size + loadaddr;
 151         initrd_size = load_image(initrd_filename, phys_ram_base + initrd_base);
 152
 153         if (initrd_size < 0) {
 154             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 155                     initrd_filename);
 156             exit(1);
 157         }
 158     }
 159
 160     /* If we're loading a kernel directly, we must load the device tree too. */
 161     if (kernel_filename) {
 162         if (initrd_base)
 163             dt_base = initrd_base + initrd_size;
 164         else
 165             dt_base = kernel_size + loadaddr;
 166
 167         fdt = bamboo_load_device_tree(phys_ram_base + dt_base, ram_size,
 168                                       initrd_base, initrd_size, kernel_cmdline);
 169         if (fdt == NULL) {
 170             fprintf(stderr, "couldn't load device tree\n");
 171             exit(1);
 172         }
 173
 174         /* Set initial guest state. */
 175         env->gpr[1] = (16<<20) - 8;
 176         env->gpr[3] = dt_base;
 177         env->nip = entry;
 178         /* XXX we currently depend on KVM to create some initial TLB entries. */
 179     }
 180
 181     if (kvm_enabled())
 182         kvmppc_init();
 183 }
 184
 185 QEMUMachine bamboo_machine = {
 186     .name = "bamboo",
 187     .desc = "bamboo",
 188     .init = bamboo_init,
 189     .ram_require = 8<<20 | RAMSIZE_FIXED,
 190 };