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 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 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         goto out;
  46     }
  47     fdt = load_device_tree(filename, &fdt_size);
  48     qemu_free(filename);
  49     if (fdt == NULL) {
  50         goto out;
  51     }
  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     cpu_physical_memory_write (addr, (void *)fdt, fdt_size);
  79
  80 out:
  81 #endif
  82
  83     return fdt;
  84 }
  85
  86 static void bamboo_init(ram_addr_t 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_phys_addr_t entry = 0;
  99     target_phys_addr_t 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, cpu_model);
 109
 110     if (pcibus) {
 111         /* Register network interfaces. */
 112         for (i = 0; i < nb_nics; i++) {
 113             /* There are no PCI NICs on the Bamboo board, but there are
 114              * PCI slots, so we can pick whatever default model we want. */
 115             pci_nic_init_nofail(&nd_table[i], "e1000", NULL);
 116         }
 117     }
 118
 119     /* Load kernel. */
 120     if (kernel_filename) {
 121         kernel_size = load_uimage(kernel_filename, &entry, &loadaddr, NULL);
 122         if (kernel_size < 0) {
 123             kernel_size = load_elf(kernel_filename, 0, &elf_entry, &elf_lowaddr,
 124                                    NULL, 1, ELF_MACHINE, 0);
 125             entry = elf_entry;
 126             loadaddr = elf_lowaddr;
 127         }
 128         /* XXX try again as binary */
 129         if (kernel_size < 0) {
 130             fprintf(stderr, "qemu: could not load kernel '%s'\n",
 131                     kernel_filename);
 132             exit(1);
 133         }
 134     }
 135
 136     /* Load initrd. */
 137     if (initrd_filename) {
 138         initrd_base = kernel_size + loadaddr;
 139         initrd_size = load_image_targphys(initrd_filename, initrd_base,
 140                                           ram_size - initrd_base);
 141
 142         if (initrd_size < 0) {
 143             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 144                     initrd_filename);
 145             exit(1);
 146         }
 147     }
 148
 149     /* If we're loading a kernel directly, we must load the device tree too. */
 150     if (kernel_filename) {
 151         if (initrd_base)
 152             dt_base = initrd_base + initrd_size;
 153         else
 154             dt_base = kernel_size + loadaddr;
 155
 156         fdt = bamboo_load_device_tree(dt_base, ram_size,
 157                                       initrd_base, initrd_size, kernel_cmdline);
 158         if (fdt == NULL) {
 159             fprintf(stderr, "couldn't load device tree\n");
 160             exit(1);
 161         }
 162
 163         /* Set initial guest state. */
 164         env->gpr[1] = (16<<20) - 8;
 165         env->gpr[3] = dt_base;
 166         env->nip = entry;
 167         /* XXX we currently depend on KVM to create some initial TLB entries. */
 168     }
 169
 170     if (kvm_enabled())
 171         kvmppc_init();
 172 }
 173
 174 static QEMUMachine bamboo_machine = {
 175     .name = "bamboo",
 176     .desc = "bamboo",
 177     .init = bamboo_init,
 178 };
 179
 180 static void bamboo_machine_init(void)
 181 {
 182     qemu_register_machine(&bamboo_machine);
 183 }
 184
 185 machine_init(bamboo_machine_init);