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 #include "exec-memory.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     MemoryRegion *address_space_mem = get_system_memory();
  42     MemoryRegion *ram = g_new(MemoryRegion, 1);
  43     MemoryRegion *sram = g_new(MemoryRegion, 1);
  44
  45     if (!cpu_model)
  46         cpu_model = "m5206";
  47     env = cpu_init(cpu_model);
  48     if (!env) {
  49         hw_error("Unable to find m68k CPU definition\n");
  50     }
  51
  52     /* Initialize CPU registers.  */
  53     env->vbr = 0;
  54     /* TODO: allow changing MBAR and RAMBAR.  */
  55     env->mbar = AN5206_MBAR_ADDR | 1;
  56     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
  57
  58     /* DRAM at address zero */
  59     memory_region_init_ram(ram, NULL, "an5206.ram", ram_size);
  60     memory_region_add_subregion(address_space_mem, 0, ram);
  61
  62     /* Internal SRAM.  */
  63     memory_region_init_ram(sram, NULL, "an5206.sram", 512);
  64     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
  65
  66     mcf5206_init(AN5206_MBAR_ADDR, env);
  67
  68     /* Load kernel.  */
  69     if (!kernel_filename) {
  70         fprintf(stderr, "Kernel image must be specified\n");
  71         exit(1);
  72     }
  73
  74     kernel_size = load_elf(kernel_filename, NULL, NULL, &elf_entry,
  75                            NULL, NULL, 1, ELF_MACHINE, 0);
  76     entry = elf_entry;
  77     if (kernel_size < 0) {
  78         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL);
  79     }
  80     if (kernel_size < 0) {
  81         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
  82                                           ram_size - KERNEL_LOAD_ADDR);
  83         entry = KERNEL_LOAD_ADDR;
  84     }
  85     if (kernel_size < 0) {
  86         fprintf(stderr, "qemu: could not load kernel '%s'\n", kernel_filename);
  87         exit(1);
  88     }
  89
  90     env->pc = entry;
  91 }
  92
  93 static QEMUMachine an5206_machine = {
  94     .name = "an5206",
  95     .desc = "Arnewsh 5206",
  96     .init = an5206_init,
  97 };
  98
  99 static void an5206_machine_init(void)
 100 {
 101     qemu_register_machine(&an5206_machine);
 102 }
 103
 104 machine_init(an5206_machine_init);