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 "vl.h"
  10
  11 #define KERNEL_LOAD_ADDR 0x10000
  12 #define AN5206_MBAR_ADDR 0x10000000
  13 #define AN5206_RAMBAR_ADDR 0x20000000
  14
  15 /* Stub functions for hardware that doesn't exist.  */
  16 void pic_info(void)
  17 {
  18 }
  19
  20 void irq_info(void)
  21 {
  22 }
  23
  24 void DMA_run (void)
  25 {
  26 }
  27
  28 /* Board init.  */
  29
  30 static void an5206_init(int ram_size, int vga_ram_size, int boot_device,
  31                      DisplayState *ds, const char **fd_filename, int snapshot,
  32                      const char *kernel_filename, const char *kernel_cmdline,
  33                      const char *initrd_filename, const char *cpu_model)
  34 {
  35     CPUState *env;
  36     int kernel_size;
  37     uint64_t elf_entry;
  38     target_ulong entry;
  39
  40     env = cpu_init();
  41     if (!cpu_model)
  42         cpu_model = "m5206";
  43     cpu_m68k_set_model(env, cpu_model);
  44
  45     /* Initialize CPU registers.  */
  46     env->vbr = 0;
  47     /* TODO: allow changing MBAR and RAMBAR.  */
  48     env->mbar = AN5206_MBAR_ADDR | 1;
  49     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  50
  51     /* DRAM at address zero */
  52     cpu_register_physical_memory(0, ram_size,
  53         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  54
  55     /* Internal SRAM.  */
  56     cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
  57         qemu_ram_alloc(512) | IO_MEM_RAM);
  58
  59     mcf5206_init(AN5206_MBAR_ADDR, env);
  60
  61     /* Load kernel.  */
  62     if (!kernel_filename) {
  63         fprintf(stderr, "Kernel image must be specified\n");
  64         exit(1);
  65     }
  66
  67     kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  68     entry = elf_entry;
  69     if (kernel_size < 0) {
  70         kernel_size = load_uboot(kernel_filename, &entry, NULL);
  71     }
  72     if (kernel_size < 0) {
  73         kernel_size = load_image(kernel_filename,
  74                                  phys_ram_base + KERNEL_LOAD_ADDR);
  75         entry = KERNEL_LOAD_ADDR;
  76     }
  77     if (kernel_size < 0) {
  78         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  79         exit(1);
  80     }
  81
  82     env->pc = entry;
  83 }
  84
  85 QEMUMachine an5206_machine = {
  86     "an5206",
  87     "Arnewsh 5206",
  88     an5206_init,
  89 };