diff options
Diffstat (limited to 'hw/mips/r4k.c')
| -rw-r--r-- | hw/mips/r4k.c | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/hw/mips/r4k.c b/hw/mips/r4k.c new file mode 100644 index 0000000000..3487013a4a --- /dev/null +++ b/hw/mips/r4k.c @@ -0,0 +1,318 @@ +/* + * QEMU/MIPS pseudo-board + * + * emulates a simple machine with ISA-like bus. + * ISA IO space mapped to the 0x14000000 (PHYS) and + * ISA memory at the 0x10000000 (PHYS, 16Mb in size). + * All peripherial devices are attached to this "bus" with + * the standard PC ISA addresses. + */ + +#include "qemu/osdep.h" +#include "qemu/units.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "cpu.h" +#include "hw/mips/mips.h" +#include "hw/mips/cpudevs.h" +#include "hw/intc/i8259.h" +#include "hw/char/serial.h" +#include "hw/isa/isa.h" +#include "net/net.h" +#include "hw/net/ne2000-isa.h" +#include "sysemu/sysemu.h" +#include "hw/boards.h" +#include "hw/block/flash.h" +#include "qemu/log.h" +#include "hw/mips/bios.h" +#include "hw/ide.h" +#include "hw/ide/internal.h" +#include "hw/loader.h" +#include "elf.h" +#include "hw/rtc/mc146818rtc.h" +#include "hw/input/i8042.h" +#include "hw/timer/i8254.h" +#include "exec/address-spaces.h" +#include "sysemu/qtest.h" +#include "sysemu/reset.h" +#include "sysemu/runstate.h" +#include "qemu/error-report.h" + +#define MAX_IDE_BUS 2 + +static const int ide_iobase[2] = { 0x1f0, 0x170 }; +static const int ide_iobase2[2] = { 0x3f6, 0x376 }; +static const int ide_irq[2] = { 14, 15 }; + +static ISADevice *pit; /* PIT i8254 */ + +/* i8254 PIT is attached to the IRQ0 at PIC i8259 */ + +static struct _loaderparams { + int ram_size; + const char *kernel_filename; + const char *kernel_cmdline; + const char *initrd_filename; +} loaderparams; + +static void mips_qemu_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + if ((addr & 0xffff) == 0 && val == 42) { + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); + } else if ((addr & 0xffff) == 4 && val == 42) { + qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN); + } +} + +static uint64_t mips_qemu_read(void *opaque, hwaddr addr, + unsigned size) +{ + return 0; +} + +static const MemoryRegionOps mips_qemu_ops = { + .read = mips_qemu_read, + .write = mips_qemu_write, + .endianness = DEVICE_NATIVE_ENDIAN, +}; + +typedef struct ResetData { + MIPSCPU *cpu; + uint64_t vector; +} ResetData; + +static int64_t load_kernel(void) +{ + const size_t params_size = 264; + int64_t entry, kernel_high, initrd_size; + long kernel_size; + ram_addr_t initrd_offset; + uint32_t *params_buf; + int big_endian; + +#ifdef TARGET_WORDS_BIGENDIAN + big_endian = 1; +#else + big_endian = 0; +#endif + kernel_size = load_elf(loaderparams.kernel_filename, NULL, + cpu_mips_kseg0_to_phys, NULL, + (uint64_t *)&entry, NULL, + (uint64_t *)&kernel_high, NULL, big_endian, + EM_MIPS, 1, 0); + if (kernel_size >= 0) { + if ((entry & ~0x7fffffffULL) == 0x80000000) { + entry = (int32_t)entry; + } + } else { + error_report("could not load kernel '%s': %s", + loaderparams.kernel_filename, + load_elf_strerror(kernel_size)); + 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 > ram_size) { + error_report("memory too small for initial ram disk '%s'", + loaderparams.initrd_filename); + exit(1); + } + initrd_size = load_image_targphys(loaderparams.initrd_filename, + initrd_offset, + ram_size - initrd_offset); + } + if (initrd_size == (target_ulong) -1) { + error_report("could not load initial ram disk '%s'", + loaderparams.initrd_filename); + exit(1); + } + } + + /* Store command line. */ + params_buf = g_malloc(params_size); + + params_buf[0] = tswap32(ram_size); + params_buf[1] = tswap32(0x12345678); + + if (initrd_size > 0) { + snprintf((char *)params_buf + 8, 256, + "rd_start=0x%" PRIx64 " rd_size=%" PRId64 " %s", + cpu_mips_phys_to_kseg0(NULL, initrd_offset), + initrd_size, loaderparams.kernel_cmdline); + } else { + snprintf((char *)params_buf + 8, 256, + "%s", loaderparams.kernel_cmdline); + } + + rom_add_blob_fixed("params", params_buf, params_size, + 16 * MiB - params_size); + + g_free(params_buf); + 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; +} + +static const int sector_len = 32 * KiB; +static +void mips_r4k_init(MachineState *machine) +{ + 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 *bios; + MemoryRegion *iomem = g_new(MemoryRegion, 1); + MemoryRegion *isa_io = g_new(MemoryRegion, 1); + MemoryRegion *isa_mem = g_new(MemoryRegion, 1); + int bios_size; + MIPSCPU *cpu; + CPUMIPSState *env; + ResetData *reset_info; + int i; + qemu_irq *i8259; + ISABus *isa_bus; + DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS]; + DriveInfo *dinfo; + int be; + + /* init CPUs */ + cpu = MIPS_CPU(cpu_create(machine->cpu_type)); + 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 */ + if (machine->ram_size > 256 * MiB) { + error_report("Too much memory for this machine: %" PRId64 "MB," + " maximum 256MB", ram_size / MiB); + exit(1); + } + memory_region_add_subregion(address_space_mem, 0, machine->ram); + + memory_region_init_io(iomem, NULL, &mips_qemu_ops, + NULL, "mips-qemu", 0x10000); + + memory_region_add_subregion(address_space_mem, 0x1fbf0000, iomem); + + /* + * Try to load a BIOS image. If this fails, we continue regardless, + * but initialize the hardware ourselves. When a kernel gets + * preloaded we also initialize the hardware, since the BIOS wasn't + * run. + */ + + if (bios_name == NULL) { + bios_name = BIOS_FILENAME; + } + filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); + if (filename) { + bios_size = get_image_size(filename); + } else { + bios_size = -1; + } +#ifdef TARGET_WORDS_BIGENDIAN + be = 1; +#else + be = 0; +#endif + dinfo = drive_get(IF_PFLASH, 0, 0); + if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) { + bios = g_new(MemoryRegion, 1); + memory_region_init_rom(bios, NULL, "mips_r4k.bios", BIOS_SIZE, + &error_fatal); + memory_region_add_subregion(get_system_memory(), 0x1fc00000, bios); + + load_image_targphys(filename, 0x1fc00000, BIOS_SIZE); + } else if (dinfo != NULL) { + uint32_t mips_rom = 0x00400000; + if (!pflash_cfi01_register(0x1fc00000, "mips_r4k.bios", mips_rom, + blk_by_legacy_dinfo(dinfo), + sector_len, 4, 0, 0, 0, 0, be)) { + fprintf(stderr, "qemu: Error registering flash memory.\n"); + } + } else if (!qtest_enabled()) { + /* not fatal */ + warn_report("could not load MIPS bios '%s'", bios_name); + } + g_free(filename); + + if (kernel_filename) { + loaderparams.ram_size = machine->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(cpu); + cpu_mips_clock_init(cpu); + + /* ISA bus: IO space at 0x14000000, mem space at 0x10000000 */ + memory_region_init_alias(isa_io, NULL, "isa-io", + get_system_io(), 0, 0x00010000); + memory_region_init(isa_mem, NULL, "isa-mem", 0x01000000); + memory_region_add_subregion(get_system_memory(), 0x14000000, isa_io); + memory_region_add_subregion(get_system_memory(), 0x10000000, isa_mem); + isa_bus = isa_bus_new(NULL, isa_mem, get_system_io(), &error_abort); + + /* The PIC is attached to the MIPS CPU INT0 pin */ + i8259 = i8259_init(isa_bus, env->irq[2]); + isa_bus_irqs(isa_bus, i8259); + + mc146818_rtc_init(isa_bus, 2000, NULL); + + pit = i8254_pit_init(isa_bus, 0x40, 0, NULL); + + serial_hds_isa_init(isa_bus, 0, MAX_ISA_SERIAL_PORTS); + + isa_vga_init(isa_bus); + + if (nd_table[0].used) { + isa_ne2000_init(isa_bus, 0x300, 9, &nd_table[0]); + } + + ide_drive_get(hd, ARRAY_SIZE(hd)); + for (i = 0; i < MAX_IDE_BUS; i++) + isa_ide_init(isa_bus, ide_iobase[i], ide_iobase2[i], ide_irq[i], + hd[MAX_IDE_DEVS * i], + hd[MAX_IDE_DEVS * i + 1]); + + isa_create_simple(isa_bus, TYPE_I8042); +} + +static void mips_machine_init(MachineClass *mc) +{ + mc->deprecation_reason = "use malta machine type instead"; + mc->desc = "mips r4k platform"; + mc->init = mips_r4k_init; + mc->block_default_type = IF_IDE; +#ifdef TARGET_MIPS64 + mc->default_cpu_type = MIPS_CPU_TYPE_NAME("R4000"); +#else + mc->default_cpu_type = MIPS_CPU_TYPE_NAME("24Kf"); +#endif + mc->default_ram_id = "mips_r4k.ram"; +} + +DEFINE_MACHINE("mips", mips_machine_init) |