hw/an5206.c

   1 /*
   2  * Arnewsh 5206 ColdFire system emulation.
   3  *
   4  * Copyright (c) 2007 CodeSourcery.
   5  *
   6  * This code is licenced under the GPL
   7  */
   8
   9 #include "hw.h"
  10 #include "mcf.h"
  11 #include "sysemu.h"
  12 #include "boards.h"
  13
  14 #define KERNEL_LOAD_ADDR 0x10000
  15 #define AN5206_MBAR_ADDR 0x10000000
  16 #define AN5206_RAMBAR_ADDR 0x20000000
  17
  18 /* Stub functions for hardware that doesn't exist.  */
  19 void pic_info(void)
  20 {
  21 }
  22
  23 void irq_info(void)
  24 {
  25 }
  26
  27 /* Board init.  */
  28
  29 static void an5206_init(ram_addr_t ram_size, int vga_ram_size,
  30                      const char *boot_device,
  31                      const char *kernel_filename, const char *kernel_cmdline,
  32                      const char *initrd_filename, const char *cpu_model)
  33 {
  34     CPUState *env;
  35     int kernel_size;
  36     uint64_t elf_entry;
  37     target_ulong entry;
  38
  39     if (!cpu_model)
  40         cpu_model = "m5206";
  41     env = cpu_init(cpu_model);
  42     if (!env) {
  43         cpu_abort(env, "Unable to find m68k CPU definition\n");
  44     }
  45
  46     /* Initialize CPU registers.  */
  47     env->vbr = 0;
  48     /* TODO: allow changing MBAR and RAMBAR.  */
  49     env->mbar = AN5206_MBAR_ADDR | 1;
  50     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  51
  52     /* DRAM at address zero */
  53     cpu_register_physical_memory(0, ram_size,
  54         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  55
  56     /* Internal SRAM.  */
  57     cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
  58         qemu_ram_alloc(512) | IO_MEM_RAM);
  59
  60     mcf5206_init(AN5206_MBAR_ADDR, env);
  61
  62     /* Load kernel.  */
  63     if (!kernel_filename) {
  64         fprintf(stderr, "Kernel image must be specified\n");
  65         exit(1);
  66     }
  67
  68     kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  69     entry = elf_entry;
  70     if (kernel_size < 0) {
  71         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  72     }
  73     if (kernel_size < 0) {
  74         kernel_size = load_image(kernel_filename,
  75                                  phys_ram_base + KERNEL_LOAD_ADDR);
  76         entry = KERNEL_LOAD_ADDR;
  77     }
  78     if (kernel_size < 0) {
  79         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  80         exit(1);
  81     }
  82
  83     env->pc = entry;
  84 }
  85
  86 QEMUMachine an5206_machine = {
  87     .name = "an5206",
  88     .desc = "Arnewsh 5206",
  89     .init = an5206_init,
  90     .ram_require = 512,
  91 };