| /* |
| * 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 "qemu/osdep.h" |
| #include "qemu/error-report.h" |
| #include "qapi/error.h" |
| #include "cpu.h" |
| #include "hw/sysbus.h" |
| #include "net/net.h" |
| #include "sysemu/reset.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 |
| #define FIRMWARE_BASE 0x1000 |
| #define FIRMWARE_SIZE (128 * 0x1000) |
| |
| 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; |
| int64_t initrd_size; |
| long kernel_size; |
| ram_addr_t initrd_offset; |
| |
| kernel_size = load_elf(loader_params->kernel_filename, NULL, NULL, NULL, |
| &entry, &kernel_low, &kernel_high, NULL, 1, EM_MOXIE, |
| 0, 0); |
| |
| if (kernel_size <= 0) { |
| error_report("could not load kernel '%s'", |
| 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) { |
| error_report("memory too small for initial ram disk '%s'", |
| 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) { |
| error_report("could not load initial ram disk '%s'", |
| 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 *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. */ |
| cpu = MOXIE_CPU(cpu_create(machine->cpu_type)); |
| env = &cpu->env; |
| |
| qemu_register_reset(main_cpu_reset, cpu); |
| |
| /* Allocate RAM. */ |
| memory_region_init_ram(ram, NULL, "moxiesim.ram", ram_size, &error_fatal); |
| memory_region_add_subregion(address_space_mem, ram_base, ram); |
| |
| memory_region_init_ram(rom, NULL, "moxie.rom", FIRMWARE_SIZE, &error_fatal); |
| memory_region_add_subregion(get_system_memory(), FIRMWARE_BASE, 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); |
| } |
| if (bios_name) { |
| if (load_image_targphys(bios_name, FIRMWARE_BASE, FIRMWARE_SIZE) < 0) { |
| error_report("Failed to load firmware '%s'", bios_name); |
| } |
| } |
| |
| /* A single 16450 sits at offset 0x3f8. */ |
| if (serial_hd(0)) { |
| serial_mm_init(address_space_mem, 0x3f8, 0, env->irq[4], |
| 8000000/16, serial_hd(0), DEVICE_LITTLE_ENDIAN); |
| } |
| } |
| |
| static void moxiesim_machine_init(MachineClass *mc) |
| { |
| mc->desc = "Moxie simulator platform"; |
| mc->init = moxiesim_init; |
| mc->is_default = true; |
| mc->default_cpu_type = MOXIE_CPU_TYPE_NAME("MoxieLite"); |
| } |
| |
| DEFINE_MACHINE("moxiesim", moxiesim_machine_init) |