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