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