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(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 HAVE_FDT
  38     uint32_t mem_reg_property[] = { 0, 0, ramsize };
  39     char *path;
  40     int fdt_size;
  41     int pathlen;
  42     int ret;
  43
  44     pathlen = snprintf(NULL, 0, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE) + 1;
  45     path = qemu_malloc(pathlen);
  46
  47     snprintf(path, pathlen, "%s/%s", bios_dir, BINARY_DEVICE_TREE_FILE);
  48
  49     fdt = load_device_tree(path, &fdt_size);
  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     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  80
  81 out:
  82 #endif
  83
  84     return fdt;
  85 }
  86
  87 static void bamboo_init(ram_addr_t ram_size,
  88                         const char *boot_device,
  89                         const char *kernel_filename,
  90                         const char *kernel_cmdline,
  91                         const char *initrd_filename,
  92                         const char *cpu_model)
  93 {
  94     unsigned int pci_irq_nrs[4] = { 28, 27, 26, 25 };
  95     PCIBus *pcibus;
  96     CPUState *env;
  97     uint64_t elf_entry;
  98     uint64_t elf_lowaddr;
  99     target_ulong entry = 0;
 100     target_ulong loadaddr = 0;
 101     target_long kernel_size = 0;
 102     target_ulong initrd_base = 0;
 103     target_long initrd_size = 0;
 104     target_ulong dt_base = 0;
 105     void *fdt;
 106     int i;
 107
 108     /* Setup CPU. */
 109     env = ppc440ep_init(&ram_size, &pcibus, pci_irq_nrs, 1);
 110
 111     if (pcibus) {
 112         int unit_id = 0;
 113
 114         /* Add virtio block devices. */
 115         while ((i = drive_get_index(IF_VIRTIO, 0, unit_id)) != -1) {
 116             virtio_blk_init(pcibus, drives_table[i].bdrv);
 117             unit_id++;
 118         }
 119
 120         /* Add virtio console devices */
 121         for(i = 0; i < MAX_VIRTIO_CONSOLES; i++) {
 122             if (virtcon_hds[i])
 123                 virtio_console_init(pcibus, virtcon_hds[i]);
 124         }
 125
 126         /* Register network interfaces. */
 127         for (i = 0; i < nb_nics; i++) {
 128             /* There are no PCI NICs on the Bamboo board, but there are
 129              * PCI slots, so we can pick whatever default model we want. */
 130             pci_nic_init(pcibus, &nd_table[i], -1, "e1000");
 131         }
 132     }
 133
 134     /* Load kernel. */
 135     if (kernel_filename) {
 136         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 137         if (kernel_size < 0) {
 138             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 139                                    NULL);
 140             entry = elf_entry;
 141             loadaddr = elf_lowaddr;
 142         }
 143         /* XXX try again as binary */
 144         if (kernel_size < 0) {
 145             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 146                     kernel_filename);
 147             exit(1);
 148         }
 149     }
 150
 151     /* Load initrd. */
 152     if (initrd_filename) {
 153         initrd_base = kernel_size + loadaddr;
 154         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 155                                           ram_size - initrd_base);
 156
 157         if (initrd_size < 0) {
 158             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 159                     initrd_filename);
 160             exit(1);
 161         }
 162     }
 163
 164     /* If we're loading a kernel directly, we must load the device tree too. */
 165     if (kernel_filename) {
 166         if (initrd_base)
 167             dt_base = initrd_base + initrd_size;
 168         else
 169             dt_base = kernel_size + loadaddr;
 170
 171         fdt = bamboo_load_device_tree(dt_base, ram_size,
 172                                       initrd_base, initrd_size, kernel_cmdline);
 173         if (fdt == NULL) {
 174             fprintf(stderr, "couldn't load device tree\n");
 175             exit(1);
 176         }
 177
 178         /* Set initial guest state. */
 179         env->gpr[1] = (16<<20) - 8;
 180         env->gpr[3] = dt_base;
 181         env->nip = entry;
 182         /* XXX we currently depend on KVM to create some initial TLB entries. */
 183     }
 184
 185     if (kvm_enabled())
 186         kvmppc_init();
 187 }
 188
 189 QEMUMachine bamboo_machine = {
 190     .name = "bamboo",
 191     .desc = "bamboo",
 192     .init = bamboo_init,
 193 };