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 "pc.h"
  11 #include "mcf.h"
  12 #include "sysemu.h"
  13 #include "boards.h"
  14
  15 #define KERNEL_LOAD_ADDR 0x10000
  16 #define AN5206_MBAR_ADDR 0x10000000
  17 #define AN5206_RAMBAR_ADDR 0x20000000
  18
  19 /* Stub functions for hardware that doesn't exist.  */
  20 void pic_info(Monitor *mon)
  21 {
  22 }
  23
  24 void irq_info(Monitor *mon)
  25 {
  26 }
  27
  28 /* Board init.  */
  29
  30 static void an5206_init(ram_addr_t ram_size, int vga_ram_size,
  31                      const char *boot_device,
  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     if (!cpu_model)
  41         cpu_model = "m5206";
  42     env = cpu_init(cpu_model);
  43     if (!env) {
  44         cpu_abort(env, "Unable to find m68k CPU definition\n");
  45     }
  46
  47     /* Initialize CPU registers.  */
  48     env->vbr = 0;
  49     /* TODO: allow changing MBAR and RAMBAR.  */
  50     env->mbar = AN5206_MBAR_ADDR | 1;
  51     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  52
  53     /* DRAM at address zero */
  54     cpu_register_physical_memory(0, ram_size,
  55         qemu_ram_alloc(ram_size) | IO_MEM_RAM);
  56
  57     /* Internal SRAM.  */
  58     cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
  59         qemu_ram_alloc(512) | IO_MEM_RAM);
  60
  61     mcf5206_init(AN5206_MBAR_ADDR, env);
  62
  63     /* Load kernel.  */
  64     if (!kernel_filename) {
  65         fprintf(stderr, "Kernel image must be specified\n");
  66         exit(1);
  67     }
  68
  69     kernel_size = load_elf(kernel_filename, 0, &elf_entry, NULL, NULL);
  70     entry = elf_entry;
  71     if (kernel_size < 0) {
  72         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  73     }
  74     if (kernel_size < 0) {
  75         kernel_size = load_image(kernel_filename,
  76                                  phys_ram_base + KERNEL_LOAD_ADDR);
  77         entry = KERNEL_LOAD_ADDR;
  78     }
  79     if (kernel_size < 0) {
  80         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  81         exit(1);
  82     }
  83
  84     env->pc = entry;
  85 }
  86
  87 QEMUMachine an5206_machine = {
  88     .name = "an5206",
  89     .desc = "Arnewsh 5206",
  90     .init = an5206_init,
  91     .ram_require = 512,
  92 };