hw/an5206.c

   1 /*
   2  * Arnewsh 5206 ColdFire system emulation.
   3  *
   4  * Copyright (c) 2007 CodeSourcery.
   5  *
   6  * This code is licensed under the GPL
   7  */
   8
   9 #include "hw.h"
  10 #include "pc.h"
  11 #include "mcf.h"
  12 #include "boards.h"
  13 #include "loader.h"
  14 #include "elf.h"
  15
  16 #define KERNEL_LOAD_ADDR 0x10000
  17 #define AN5206_MBAR_ADDR 0x10000000
  18 #define AN5206_RAMBAR_ADDR 0x20000000
  19
  20 /* Stub functions for hardware that doesn't exist.  */
  21 void pic_info(Monitor *mon)
  22 {
  23 }
  24
  25 void irq_info(Monitor *mon)
  26 {
  27 }
  28
  29 /* Board init.  */
  30
  31 static void an5206_init(ram_addr_t ram_size,
  32                      const char *boot_device,
  33                      const char *kernel_filename, const char *kernel_cmdline,
  34                      const char *initrd_filename, const char *cpu_model)
  35 {
  36     CPUState *env;
  37     int kernel_size;
  38     uint64_t elf_entry;
  39     target_phys_addr_t entry;
  40
  41     if (!cpu_model)
  42         cpu_model = "m5206";
  43     env = cpu_init(cpu_model);
  44     if (!env) {
  45         hw_error("Unable to find m68k CPU definition\n");
  46     }
  47
  48     /* Initialize CPU registers.  */
  49     env->vbr = 0;
  50     /* TODO: allow changing MBAR and RAMBAR.  */
  51     env->mbar = AN5206_MBAR_ADDR | 1;
  52     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  53
  54     /* DRAM at address zero */
  55     cpu_register_physical_memory(0, ram_size,
  56         qemu_ram_alloc(NULL, "an5206.ram", ram_size) | IO_MEM_RAM);
  57
  58     /* Internal SRAM.  */
  59     cpu_register_physical_memory(AN5206_RAMBAR_ADDR, 512,
  60         qemu_ram_alloc(NULL, "an5206.sram", 512) | IO_MEM_RAM);
  61
  62     mcf5206_init(AN5206_MBAR_ADDR, env);
  63
  64     /* Load kernel.  */
  65     if (!kernel_filename) {
  66         fprintf(stderr, "Kernel image must be specified\n");
  67         exit(1);
  68     }
  69
  70     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  71                            NULL, NULL, 1, ELF_MACHINE, 0);
  72     entry = elf_entry;
  73     if (kernel_size < 0) {
  74         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  75     }
  76     if (kernel_size < 0) {
  77         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  78                                           ram_size - KERNEL_LOAD_ADDR);
  79         entry = KERNEL_LOAD_ADDR;
  80     }
  81     if (kernel_size < 0) {
  82         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  83         exit(1);
  84     }
  85
  86     env->pc = entry;
  87 }
  88
  89 static QEMUMachine an5206_machine = {
  90     .name = "an5206",
  91     .desc = "Arnewsh 5206",
  92     .init = an5206_init,
  93 };
  94
  95 static void an5206_machine_init(void)
  96 {
  97     qemu_register_machine(&an5206_machine);
  98 }
  99
 100 machine_init(an5206_machine_init);