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 void DMA_run (void)
  28 {
  29 }
  30
  31 /* Board init.  */
  32
  33 static void an5206_init(int ram_size, int vga_ram_size,
  34                      const char *boot_device, DisplayState *ds,
  35                      const char *kernel_filename, const char *kernel_cmdline,
  36                      const char *initrd_filename, const char *cpu_model)
  37 {
  38     CPUState *env;
  39     int kernel_size;
  40     uint64_t elf_entry;
  41     target_ulong entry;
  42
  43     if (!cpu_model)
  44         cpu_model = "m5206";
  45     env = cpu_init(cpu_model);
  46     if (!env) {
  47         cpu_abort(env, "Unable to find m68k CPU definition\n");
  48     }
  49
  50     /* Initialize CPU registers.  */
  51     env->vbr = 0;
  52     /* TODO: allow changing MBAR and RAMBAR.  */
  53     env->mbar = AN5206_MBAR_ADDR | 1;
  54     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  55
  56     /* DRAM at address zero */
  57     cpu_register_physical_memory(0, ram_size,
  58         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  59
  60     /* Internal SRAM.  */
  61     cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
  62         qemu_ram_alloc(512) | IO_MEM_RAM);
  63
  64     mcf5206_init(AN5206_MBAR_ADDR, env);
  65
  66     /* Load kernel.  */
  67     if (!kernel_filename) {
  68         fprintf(stderr, "Kernel image must be specified\n");
  69         exit(1);
  70     }
  71
  72     kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  73     entry = elf_entry;
  74     if (kernel_size < 0) {
  75         kernel_size = load_uboot(kernel_filename, &entry, NULL);
  76     }
  77     if (kernel_size < 0) {
  78         kernel_size = load_image(kernel_filename,
  79                                  phys_ram_base + KERNEL_LOAD_ADDR);
  80         entry = KERNEL_LOAD_ADDR;
  81     }
  82     if (kernel_size < 0) {
  83         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  84         exit(1);
  85     }
  86
  87     env->pc = entry;
  88 }
  89
  90 QEMUMachine an5206_machine = {
  91     "an5206",
  92     "Arnewsh 5206",
  93     an5206_init,
  94 };