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