| /* |
| * QEMU/mipssim emulation |
| * |
| * Emulates a very simple machine model similar to the one used by the |
| * proprietary MIPS emulator. |
| * |
| * Copyright (c) 2007 Thiemo Seufer |
| * |
| * 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 "qapi/error.h" |
| #include "qemu-common.h" |
| #include "cpu.h" |
| #include "hw/hw.h" |
| #include "hw/mips/mips.h" |
| #include "hw/mips/cpudevs.h" |
| #include "hw/char/serial.h" |
| #include "hw/isa/isa.h" |
| #include "net/net.h" |
| #include "sysemu/sysemu.h" |
| #include "hw/boards.h" |
| #include "hw/mips/bios.h" |
| #include "hw/loader.h" |
| #include "elf.h" |
| #include "hw/sysbus.h" |
| #include "exec/address-spaces.h" |
| #include "qemu/error-report.h" |
| #include "sysemu/qtest.h" |
| |
| static struct _loaderparams { |
| int ram_size; |
| const char *kernel_filename; |
| const char *kernel_cmdline; |
| const char *initrd_filename; |
| } loaderparams; |
| |
| typedef struct ResetData { |
| MIPSCPU *cpu; |
| uint64_t vector; |
| } ResetData; |
| |
| static int64_t load_kernel(void) |
| { |
| int64_t entry, kernel_high; |
| long kernel_size; |
| long initrd_size; |
| ram_addr_t initrd_offset; |
| int big_endian; |
| |
| #ifdef TARGET_WORDS_BIGENDIAN |
| big_endian = 1; |
| #else |
| big_endian = 0; |
| #endif |
| |
| kernel_size = load_elf(loaderparams.kernel_filename, cpu_mips_kseg0_to_phys, |
| NULL, (uint64_t *)&entry, NULL, |
| (uint64_t *)&kernel_high, big_endian, |
| EM_MIPS, 1, 0); |
| if (kernel_size >= 0) { |
| if ((entry & ~0x7fffffffULL) == 0x80000000) |
| entry = (int32_t)entry; |
| } else { |
| fprintf(stderr, "qemu: could not load kernel '%s'\n", |
| loaderparams.kernel_filename); |
| exit(1); |
| } |
| |
| /* load initrd */ |
| initrd_size = 0; |
| initrd_offset = 0; |
| if (loaderparams.initrd_filename) { |
| initrd_size = get_image_size (loaderparams.initrd_filename); |
| if (initrd_size > 0) { |
| initrd_offset = (kernel_high + ~INITRD_PAGE_MASK) & INITRD_PAGE_MASK; |
| if (initrd_offset + initrd_size > loaderparams.ram_size) { |
| fprintf(stderr, |
| "qemu: memory too small for initial ram disk '%s'\n", |
| loaderparams.initrd_filename); |
| exit(1); |
| } |
| initrd_size = load_image_targphys(loaderparams.initrd_filename, |
| initrd_offset, loaderparams.ram_size - initrd_offset); |
| } |
| if (initrd_size == (target_ulong) -1) { |
| fprintf(stderr, "qemu: could not load initial ram disk '%s'\n", |
| loaderparams.initrd_filename); |
| exit(1); |
| } |
| } |
| return entry; |
| } |
| |
| static void main_cpu_reset(void *opaque) |
| { |
| ResetData *s = (ResetData *)opaque; |
| CPUMIPSState *env = &s->cpu->env; |
| |
| cpu_reset(CPU(s->cpu)); |
| env->active_tc.PC = s->vector & ~(target_ulong)1; |
| if (s->vector & 1) { |
| env->hflags |= MIPS_HFLAG_M16; |
| } |
| } |
| |
| static void mipsnet_init(int base, qemu_irq irq, NICInfo *nd) |
| { |
| DeviceState *dev; |
| SysBusDevice *s; |
| |
| dev = qdev_create(NULL, "mipsnet"); |
| qdev_set_nic_properties(dev, nd); |
| qdev_init_nofail(dev); |
| |
| s = SYS_BUS_DEVICE(dev); |
| sysbus_connect_irq(s, 0, irq); |
| memory_region_add_subregion(get_system_io(), |
| base, |
| sysbus_mmio_get_region(s, 0)); |
| } |
| |
| static void |
| mips_mipssim_init(MachineState *machine) |
| { |
| 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; |
| char *filename; |
| MemoryRegion *address_space_mem = get_system_memory(); |
| MemoryRegion *isa = g_new(MemoryRegion, 1); |
| MemoryRegion *ram = g_new(MemoryRegion, 1); |
| MemoryRegion *bios = g_new(MemoryRegion, 1); |
| MIPSCPU *cpu; |
| CPUMIPSState *env; |
| ResetData *reset_info; |
| int bios_size; |
| |
| /* Init CPUs. */ |
| if (cpu_model == NULL) { |
| #ifdef TARGET_MIPS64 |
| cpu_model = "5Kf"; |
| #else |
| cpu_model = "24Kf"; |
| #endif |
| } |
| cpu = cpu_mips_init(cpu_model); |
| if (cpu == NULL) { |
| fprintf(stderr, "Unable to find CPU definition\n"); |
| exit(1); |
| } |
| env = &cpu->env; |
| |
| reset_info = g_malloc0(sizeof(ResetData)); |
| reset_info->cpu = cpu; |
| reset_info->vector = env->active_tc.PC; |
| qemu_register_reset(main_cpu_reset, reset_info); |
| |
| /* Allocate RAM. */ |
| memory_region_allocate_system_memory(ram, NULL, "mips_mipssim.ram", |
| ram_size); |
| memory_region_init_ram(bios, NULL, "mips_mipssim.bios", BIOS_SIZE, |
| &error_fatal); |
| vmstate_register_ram_global(bios); |
| memory_region_set_readonly(bios, true); |
| |
| memory_region_add_subregion(address_space_mem, 0, ram); |
| |
| /* Map the BIOS / boot exception handler. */ |
| memory_region_add_subregion(address_space_mem, 0x1fc00000LL, bios); |
| /* Load a BIOS / boot exception handler image. */ |
| if (bios_name == NULL) |
| bios_name = BIOS_FILENAME; |
| filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); |
| if (filename) { |
| bios_size = load_image_targphys(filename, 0x1fc00000LL, BIOS_SIZE); |
| g_free(filename); |
| } else { |
| bios_size = -1; |
| } |
| if ((bios_size < 0 || bios_size > BIOS_SIZE) && |
| !kernel_filename && !qtest_enabled()) { |
| /* Bail out if we have neither a kernel image nor boot vector code. */ |
| error_report("Could not load MIPS bios '%s', and no " |
| "-kernel argument was specified", bios_name); |
| exit(1); |
| } else { |
| /* We have a boot vector start address. */ |
| env->active_tc.PC = (target_long)(int32_t)0xbfc00000; |
| } |
| |
| if (kernel_filename) { |
| loaderparams.ram_size = ram_size; |
| loaderparams.kernel_filename = kernel_filename; |
| loaderparams.kernel_cmdline = kernel_cmdline; |
| loaderparams.initrd_filename = initrd_filename; |
| reset_info->vector = load_kernel(); |
| } |
| |
| /* Init CPU internal devices. */ |
| cpu_mips_irq_init_cpu(env); |
| cpu_mips_clock_init(env); |
| |
| /* Register 64 KB of ISA IO space at 0x1fd00000. */ |
| memory_region_init_alias(isa, NULL, "isa_mmio", |
| get_system_io(), 0, 0x00010000); |
| memory_region_add_subregion(get_system_memory(), 0x1fd00000, isa); |
| |
| /* A single 16450 sits at offset 0x3f8. It is attached to |
| MIPS CPU INT2, which is interrupt 4. */ |
| if (serial_hds[0]) |
| serial_init(0x3f8, env->irq[4], 115200, serial_hds[0], |
| get_system_io()); |
| |
| if (nd_table[0].used) |
| /* MIPSnet uses the MIPS CPU INT0, which is interrupt 2. */ |
| mipsnet_init(0x4200, env->irq[2], &nd_table[0]); |
| } |
| |
| static void mips_mipssim_machine_init(MachineClass *mc) |
| { |
| mc->desc = "MIPS MIPSsim platform"; |
| mc->init = mips_mipssim_init; |
| } |
| |
| DEFINE_MACHINE("mipssim", mips_mipssim_machine_init) |
