1 /*

     2  * Dummy board with just RAM and CPU for use as an ISS.

     3  *

     4  * Copyright (c) 2007 CodeSourcery.

     5  *

     6  * This code is licenced under the GPL

     7  */

     8 

     9 #include "hw.h"

    10 #include "sysemu.h"

    11 #include "boards.h"

    12 #include "ppc.h"

    13 

    14 /* Board init.  */

    15 

    16 static void dummy_ppc_init(ram_addr_t ram_size, int vga_ram_size,

    17                      const char *boot_device, DisplayState *ds,

    18                      const char *kernel_filename, const char *kernel_cmdline,

    19                      const char *initrd_filename, const char *cpu_model)

    20 {

    21     CPUState *env;

    22     int kernel_size;

    23     uint64_t elf_entry;

    24     target_ulong entry;

    25 

    26     if (!cpu_model)

    27         cpu_model = "default";

    28     env = cpu_init(cpu_model);

    29     if (!env) {

    30         fprintf(stderr, "Unable to find ppc CPU definition\n");

    31         exit(1);

    32     }

    33 

    34     cpu_ppc_tb_init(env, 100UL * 1000UL * 1000UL);

    35     /* RAM at address zero */

    36     cpu_register_physical_memory(0x10000000, ram_size,

    37         qemu_ram_alloc(ram_size) | IO_MEM_RAM);

    38 

    39     /* Load kernel.  */

    40     if (kernel_filename) {

    41         kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);

    42         entry = elf_entry;

    43         if (kernel_size < 0) {

    44             kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);

    45         }

    46         if (kernel_size < 0) {

    47             kernel_size = load_image(kernel_filename, phys_ram_base);

    48             entry = 0;

    49         }

    50         if (kernel_size < 0) {

    51             fprintf(stderr, "qemu: could not load kernel '%s'\n",

    52                     kernel_filename);

    53             exit(1);

    54         }

    55     } else {

    56         entry = 0;

    57     }

    58     env->nip = entry;

    59     if (semihosting_enabled) {

    60         /* Setup initial stack.  */

    61         target_ulong *p;

    62         p = (target_ulong *)(phys_ram_base + ram_size);

    63         *(--p) = 0;

    64         *(--p) = 0;

    65         env->gpr[1] = 0x10000000 + ram_size - 2 * sizeof(target_ulong);

    66         /* Enable FPU.  */

    67         env->msr |= (1 << MSR_FP);

    68     }

    69 }

    70 

    71 QEMUMachine dummy_ppc_machine = {

    72     .name = "dummy",

    73     .desc = "Dummy board",

    74     .init = dummy_ppc_init,

    75     .max_cpus = 1

    76 };