diff options
Diffstat (limited to 'src/hw/moxie/moxiesim.c')
| -rw-r--r-- | src/hw/moxie/moxiesim.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/hw/moxie/moxiesim.c b/src/hw/moxie/moxiesim.c new file mode 100644 index 0000000..ada3d58 --- /dev/null +++ b/src/hw/moxie/moxiesim.c @@ -0,0 +1,156 @@ +/* + * QEMU/moxiesim emulation + * + * Emulates a very simple machine model similar to the one used by the + * GDB moxie simulator. + * + * Copyright (c) 2008, 2009, 2010, 2013 Anthony Green + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ +#include "hw/sysbus.h" +#include "hw/hw.h" +#include "hw/i386/pc.h" +#include "hw/isa/isa.h" +#include "net/net.h" +#include "sysemu/sysemu.h" +#include "hw/boards.h" +#include "hw/loader.h" +#include "hw/char/serial.h" +#include "exec/address-spaces.h" +#include "elf.h" + +#define PHYS_MEM_BASE 0x80000000 + +typedef struct { + uint64_t ram_size; + const char *kernel_filename; + const char *kernel_cmdline; + const char *initrd_filename; +} LoaderParams; + +static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params) +{ + uint64_t entry, kernel_low, kernel_high; + long kernel_size; + long initrd_size; + ram_addr_t initrd_offset; + + kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL, + &entry, &kernel_low, &kernel_high, 1, EM_MOXIE, 0); + + if (kernel_size <= 0) { + fprintf(stderr, "qemu: could not load kernel '%s'\n", + loader_params->kernel_filename); + exit(1); + } + + /* load initrd */ + initrd_size = 0; + initrd_offset = 0; + if (loader_params->initrd_filename) { + initrd_size = get_image_size(loader_params->initrd_filename); + if (initrd_size > 0) { + initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) + & TARGET_PAGE_MASK; + if (initrd_offset + initrd_size > loader_params->ram_size) { + fprintf(stderr, + "qemu: memory too small for initial ram disk '%s'\n", + loader_params->initrd_filename); + exit(1); + } + initrd_size = load_image_targphys(loader_params->initrd_filename, + initrd_offset, + ram_size); + } + if (initrd_size == (target_ulong)-1) { + fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", + loader_params->initrd_filename); + exit(1); + } + } +} + +static void main_cpu_reset(void *opaque) +{ + MoxieCPU *cpu = opaque; + + cpu_reset(CPU(cpu)); +} + +static void moxiesim_init(MachineState *machine) +{ + MoxieCPU *cpu = NULL; + ram_addr_t ram_size = machine->ram_size; + const char *cpu_model = machine->cpu_model; + const char *kernel_filename = machine->kernel_filename; + const char *kernel_cmdline = machine->kernel_cmdline; + const char *initrd_filename = machine->initrd_filename; + CPUMoxieState *env; + MemoryRegion *address_space_mem = get_system_memory(); + MemoryRegion *ram = g_new(MemoryRegion, 1); + MemoryRegion *rom = g_new(MemoryRegion, 1); + hwaddr ram_base = 0x200000; + LoaderParams loader_params; + + /* Init CPUs. */ + if (cpu_model == NULL) { + cpu_model = "MoxieLite-moxie-cpu"; + } + cpu = cpu_moxie_init(cpu_model); + if (!cpu) { + fprintf(stderr, "Unable to find CPU definition\n"); + exit(1); + } + env = &cpu->env; + + qemu_register_reset(main_cpu_reset, cpu); + + /* Allocate RAM. */ + memory_region_init_ram(ram, NULL, "moxiesim.ram", ram_size, &error_fatal); + vmstate_register_ram_global(ram); + memory_region_add_subregion(address_space_mem, ram_base, ram); + + memory_region_init_ram(rom, NULL, "moxie.rom", 128*0x1000, &error_fatal); + vmstate_register_ram_global(rom); + memory_region_add_subregion(get_system_memory(), 0x1000, rom); + + if (kernel_filename) { + loader_params.ram_size = ram_size; + loader_params.kernel_filename = kernel_filename; + loader_params.kernel_cmdline = kernel_cmdline; + loader_params.initrd_filename = initrd_filename; + load_kernel(cpu, &loader_params); + } + + /* A single 16450 sits at offset 0x3f8. */ + if (serial_hds[0]) { + serial_mm_init(address_space_mem, 0x3f8, 0, env->irq[4], + 8000000/16, serial_hds[0], DEVICE_LITTLE_ENDIAN); + } +} + +static void moxiesim_machine_init(MachineClass *mc) +{ + mc->desc = "Moxie simulator platform"; + mc->init = moxiesim_init; + mc->is_default = 1; +} + +DEFINE_MACHINE("moxiesim", moxiesim_machine_init) |
