hw/puv3.c

   1 /*
   2  * Generic PKUnity SoC machine and board descriptor
   3  *
   4  * Copyright (C) 2010-2012 Guan Xuetao
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation, or any later version.
   9  * See the COPYING file in the top-level directory.
  10  */
  11 #include "console.h"
  12 #include "elf.h"
  13 #include "exec-memory.h"
  14 #include "sysbus.h"
  15 #include "boards.h"
  16 #include "loader.h"
  17 #include "pc.h"
  18
  19 #undef DEBUG_PUV3
  20 #include "puv3.h"
  21
  22 #define KERNEL_LOAD_ADDR        0x03000000
  23 #define KERNEL_MAX_SIZE         0x00800000 /* Just a guess */
  24
  25 static void puv3_soc_init(CPUUniCore32State *env)
  26 {
  27     /* TODO */
  28 }
  29
  30 static void puv3_board_init(CPUUniCore32State *env, ram_addr_t ram_size)
  31 {
  32     MemoryRegion *ram_memory = g_new(MemoryRegion, 1);
  33
  34     /* SDRAM at address zero.  */
  35     memory_region_init_ram(ram_memory, "puv3.ram", ram_size);
  36     vmstate_register_ram_global(ram_memory);
  37     memory_region_add_subregion(get_system_memory(), 0, ram_memory);
  38 }
  39
  40 static void puv3_load_kernel(const char *kernel_filename)
  41 {
  42     int size;
  43
  44     assert(kernel_filename != NULL);
  45
  46     /* only zImage format supported */
  47     size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  48             KERNEL_MAX_SIZE);
  49     if (size < 0) {
  50         hw_error("Load kernel error: '%s'\n", kernel_filename);
  51     }
  52
  53     /* cheat curses that we have a graphic console, only under ocd console */
  54     graphic_console_init(NULL, NULL, NULL, NULL, NULL);
  55 }
  56
  57 static void puv3_init(ram_addr_t ram_size, const char *boot_device,
  58                      const char *kernel_filename, const char *kernel_cmdline,
  59                      const char *initrd_filename, const char *cpu_model)
  60 {
  61     CPUUniCore32State *env;
  62
  63     if (initrd_filename) {
  64         hw_error("Please use kernel built-in initramdisk.\n");
  65     }
  66
  67     if (!cpu_model) {
  68         cpu_model = "UniCore-II";
  69     }
  70
  71     env = cpu_init(cpu_model);
  72     if (!env) {
  73         hw_error("Unable to find CPU definition\n");
  74     }
  75
  76     puv3_soc_init(env);
  77     puv3_board_init(env, ram_size);
  78     puv3_load_kernel(kernel_filename);
  79 }
  80
  81 static QEMUMachine puv3_machine = {
  82     .name = "puv3",
  83     .desc = "PKUnity Version-3 based on UniCore32",
  84     .init = puv3_init,
  85     .use_scsi = 0,
  86 };
  87
  88 static void puv3_machine_init(void)
  89 {
  90     qemu_register_machine(&puv3_machine);
  91 }
  92
  93 machine_init(puv3_machine_init)