qemu

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an5206.c (2836B)

      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 "qemu/osdep.h"
     10 #include "qapi/error.h"
     11 #include "cpu.h"
     12 #include "hw/m68k/mcf.h"
     13 #include "hw/boards.h"
     14 #include "hw/loader.h"
     15 #include "elf.h"
     16 #include "qemu/error-report.h"
     17 #include "sysemu/qtest.h"
     18 
     19 #define KERNEL_LOAD_ADDR 0x10000
     20 #define AN5206_MBAR_ADDR 0x10000000
     21 #define AN5206_RAMBAR_ADDR 0x20000000
     22 
     23 static void mcf5206_init(MemoryRegion *sysmem, uint32_t base)
     24 {
     25     DeviceState *dev;
     26     SysBusDevice *s;
     27 
     28     dev = qdev_new(TYPE_MCF5206_MBAR);
     29     s = SYS_BUS_DEVICE(dev);
     30     sysbus_realize_and_unref(s, &error_fatal);
     31 
     32     memory_region_add_subregion(sysmem, base, sysbus_mmio_get_region(s, 0));
     33 }
     34 
     35 static void an5206_init(MachineState *machine)
     36 {
     37     ram_addr_t ram_size = machine->ram_size;
     38     const char *kernel_filename = machine->kernel_filename;
     39     M68kCPU *cpu;
     40     CPUM68KState *env;
     41     int kernel_size;
     42     uint64_t elf_entry;
     43     hwaddr entry;
     44     MemoryRegion *address_space_mem = get_system_memory();
     45     MemoryRegion *sram = g_new(MemoryRegion, 1);
     46 
     47     cpu = M68K_CPU(cpu_create(machine->cpu_type));
     48     env = &cpu->env;
     49 
     50     /* Initialize CPU registers.  */
     51     env->vbr = 0;
     52     /* TODO: allow changing MBAR and RAMBAR.  */
     53     env->mbar = AN5206_MBAR_ADDR | 1;
     54     env->rambar0 = AN5206_RAMBAR_ADDR | 1;
     55 
     56     /* DRAM at address zero */
     57     memory_region_add_subregion(address_space_mem, 0, machine->ram);
     58 
     59     /* Internal SRAM.  */
     60     memory_region_init_ram(sram, NULL, "an5206.sram", 512, &error_fatal);
     61     memory_region_add_subregion(address_space_mem, AN5206_RAMBAR_ADDR, sram);
     62 
     63     mcf5206_init(address_space_mem, AN5206_MBAR_ADDR);
     64 
     65     /* Load kernel.  */
     66     if (!kernel_filename) {
     67         if (qtest_enabled()) {
     68             return;
     69         }
     70         error_report("Kernel image must be specified");
     71         exit(1);
     72     }
     73 
     74     kernel_size = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
     75                            NULL, NULL, NULL, 1, EM_68K, 0, 0);
     76     entry = elf_entry;
     77     if (kernel_size < 0) {
     78         kernel_size = load_uimage(kernel_filename, &entry, NULL, NULL,
     79                                   NULL, NULL);
     80     }
     81     if (kernel_size < 0) {
     82         kernel_size = load_image_targphys(kernel_filename, KERNEL_LOAD_ADDR,
     83                                           ram_size - KERNEL_LOAD_ADDR);
     84         entry = KERNEL_LOAD_ADDR;
     85     }
     86     if (kernel_size < 0) {
     87         error_report("Could not load kernel '%s'", kernel_filename);
     88         exit(1);
     89     }
     90 
     91     env->pc = entry;
     92 }
     93 
     94 static void an5206_machine_init(MachineClass *mc)
     95 {
     96     mc->desc = "Arnewsh 5206";
     97     mc->init = an5206_init;
     98     mc->default_cpu_type = M68K_CPU_TYPE_NAME("m5206");
     99     mc->default_ram_id = "an5206.ram";
    100 }
    101 
    102 DEFINE_MACHINE("an5206", an5206_machine_init)