hw/mips_r4k.c - qemu - Git at Google

 /*
  * 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 "hw.h"
 #include "mips.h"
 #include "mips_cpudevs.h"
 #include "pc.h"
 #include "isa.h"
 #include "net.h"
 #include "sysemu.h"
 #include "boards.h"
 #include "flash.h"
 #include "qemu-log.h"
 #include "mips-bios.h"
 #include "ide.h"
 #include "loader.h"
 #include "elf.h"
 #include "mc146818rtc.h"
 #include "blockdev.h"
 #include "exec-memory.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, target_phys_addr_t addr,
                              uint64_t val, unsigned size)
 {
     if ((addr & 0xffff) == 0 && val == 42)
         qemu_system_reset_request ();
     else if ((addr & 0xffff) == 4 && val == 42)
         qemu_system_shutdown_request ();
 }

 static uint64_t mips_qemu_read (void *opaque, target_phys_addr_t 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 {
     CPUState *env;
     uint64_t vector;
 } ResetData;

 static int64_t load_kernel(void)
 {
     int64_t entry, kernel_high;
     long kernel_size, initrd_size, params_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, cpu_mips_kseg0_to_phys,
                            NULL, (uint64_t *)&entry, NULL,
                            (uint64_t *)&kernel_high, big_endian,
                            ELF_MACHINE, 1);
     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 + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
             if (initrd_offset + initrd_size > 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,
                                               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);
         }
     }

     /* Store command line.  */
     params_size = 264;
     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=%li %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 << 20) - 264);

     return entry;
 }

 static void main_cpu_reset(void *opaque)
 {
     ResetData *s = (ResetData *)opaque;
     CPUState *env = s->env;

     cpu_reset(env);
     env->active_tc.PC = s->vector;
 }

 static const int sector_len = 32 * 1024;
 static
 void mips_r4k_init (ram_addr_t ram_size,
                     const char *boot_device,
                     const char *kernel_filename, const char *kernel_cmdline,
                     const char *initrd_filename, const char *cpu_model)
 {
     char *filename;
     MemoryRegion *address_space_mem = get_system_memory();
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     MemoryRegion *bios;
     MemoryRegion *iomem = g_new(MemoryRegion, 1);
     int bios_size;
     CPUState *env;
     ResetData *reset_info;
     int i;
     qemu_irq *i8259;
     DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
     DriveInfo *dinfo;
     int be;

     /* init CPUs */
     if (cpu_model == NULL) {
 #ifdef TARGET_MIPS64
         cpu_model = "R4000";
 #else
         cpu_model = "24Kf";
 #endif
     }
     env = cpu_init(cpu_model);
     if (!env) {
         fprintf(stderr, "Unable to find CPU definition\n");
         exit(1);
     }
     reset_info = g_malloc0(sizeof(ResetData));
     reset_info->env = env;
     reset_info->vector = env->active_tc.PC;
     qemu_register_reset(main_cpu_reset, reset_info);

     /* allocate RAM */
     if (ram_size > (256 << 20)) {
         fprintf(stderr,
                 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
                 ((unsigned int)ram_size / (1 << 20)));
         exit(1);
     }
     memory_region_init_ram(ram, NULL, "mips_r4k.ram", ram_size);

     memory_region_add_subregion(address_space_mem, 0, ram);

     memory_region_init_io(iomem, &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
     if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
         bios = g_new(MemoryRegion, 1);
         memory_region_init_ram(bios, NULL, "mips_r4k.bios", BIOS_SIZE);
         memory_region_set_readonly(bios, true);
         memory_region_add_subregion(get_system_memory(), 0x1fc00000, bios);

         load_image_targphys(filename, 0x1fc00000, BIOS_SIZE);
     } else if ((dinfo = drive_get(IF_PFLASH, 0, 0)) != NULL) {
         uint32_t mips_rom = 0x00400000;
         if (!pflash_cfi01_register(0x1fc00000, NULL, "mips_r4k.bios", mips_rom,
                                    dinfo->bdrv, sector_len,
                                    mips_rom / sector_len,
                                    4, 0, 0, 0, 0, be)) {
             fprintf(stderr, "qemu: Error registering flash memory.\n");
 	}
     }
     else {
 	/* not fatal */
         fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
 		bios_name);
     }
     if (filename) {
         g_free(filename);
     }

     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);

     /* The PIC is attached to the MIPS CPU INT0 pin */
     isa_bus_new(NULL, get_system_io());
     i8259 = i8259_init(env->irq[2]);
     isa_bus_irqs(i8259);

     rtc_init(2000, NULL);

     /* Register 64 KB of ISA IO space at 0x14000000 */
     isa_mmio_init(0x14000000, 0x00010000);
     isa_mem_base = 0x10000000;

     pit = pit_init(0x40, 0);

     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
         if (serial_hds[i]) {
             serial_isa_init(i, serial_hds[i]);
         }
     }

     isa_vga_init();

     if (nd_table[0].vlan)
         isa_ne2000_init(0x300, 9, &nd_table[0]);

     ide_drive_get(hd, MAX_IDE_BUS);
     for(i = 0; i < MAX_IDE_BUS; i++)
         isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
                      hd[MAX_IDE_DEVS * i],
 		     hd[MAX_IDE_DEVS * i + 1]);

     isa_create_simple("i8042");
 }

 static QEMUMachine mips_machine = {
     .name = "mips",
     .desc = "mips r4k platform",
     .init = mips_r4k_init,
 };

 static void mips_machine_init(void)
 {
     qemu_register_machine(&mips_machine);
 }

 machine_init(mips_machine_init);
	/*
	* 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 "hw.h"
	#include "mips.h"
	#include "mips_cpudevs.h"
	#include "pc.h"
	#include "isa.h"
	#include "net.h"
	#include "sysemu.h"
	#include "boards.h"
	#include "flash.h"
	#include "qemu-log.h"
	#include "mips-bios.h"
	#include "ide.h"
	#include "loader.h"
	#include "elf.h"
	#include "mc146818rtc.h"
	#include "blockdev.h"
	#include "exec-memory.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, target_phys_addr_t addr,
	uint64_t val, unsigned size)
	{
	if ((addr & 0xffff) == 0 && val == 42)
	qemu_system_reset_request ();
	else if ((addr & 0xffff) == 4 && val == 42)
	qemu_system_shutdown_request ();
	}

	static uint64_t mips_qemu_read (void *opaque, target_phys_addr_t 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 {
	CPUState *env;
	uint64_t vector;
	} ResetData;

	static int64_t load_kernel(void)
	{
	int64_t entry, kernel_high;
	long kernel_size, initrd_size, params_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, cpu_mips_kseg0_to_phys,
	NULL, (uint64_t *)&entry, NULL,
	(uint64_t *)&kernel_high, big_endian,
	ELF_MACHINE, 1);
	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 + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
	if (initrd_offset + initrd_size > 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,
	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);
	}
	}

	/* Store command line. */
	params_size = 264;
	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=%li %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 << 20) - 264);

	return entry;
	}

	static void main_cpu_reset(void *opaque)
	{
	ResetData s = (ResetData )opaque;
	CPUState *env = s->env;

	cpu_reset(env);
	env->active_tc.PC = s->vector;
	}

	static const int sector_len = 32 * 1024;
	static
	void mips_r4k_init (ram_addr_t ram_size,
	const char *boot_device,
	const char kernel_filename, const char kernel_cmdline,
	const char initrd_filename, const char cpu_model)
	{
	char *filename;
	MemoryRegion *address_space_mem = get_system_memory();
	MemoryRegion *ram = g_new(MemoryRegion, 1);
	MemoryRegion *bios;
	MemoryRegion *iomem = g_new(MemoryRegion, 1);
	int bios_size;
	CPUState *env;
	ResetData *reset_info;
	int i;
	qemu_irq *i8259;
	DriveInfo hd[MAX_IDE_BUS MAX_IDE_DEVS];
	DriveInfo *dinfo;
	int be;

	/* init CPUs */
	if (cpu_model == NULL) {
	#ifdef TARGET_MIPS64
	cpu_model = "R4000";
	#else
	cpu_model = "24Kf";
	#endif
	}
	env = cpu_init(cpu_model);
	if (!env) {
	fprintf(stderr, "Unable to find CPU definition\n");
	exit(1);
	}
	reset_info = g_malloc0(sizeof(ResetData));
	reset_info->env = env;
	reset_info->vector = env->active_tc.PC;
	qemu_register_reset(main_cpu_reset, reset_info);

	/* allocate RAM */
	if (ram_size > (256 << 20)) {
	fprintf(stderr,
	"qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
	((unsigned int)ram_size / (1 << 20)));
	exit(1);
	}
	memory_region_init_ram(ram, NULL, "mips_r4k.ram", ram_size);

	memory_region_add_subregion(address_space_mem, 0, ram);

	memory_region_init_io(iomem, &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
	if ((bios_size > 0) && (bios_size <= BIOS_SIZE)) {
	bios = g_new(MemoryRegion, 1);
	memory_region_init_ram(bios, NULL, "mips_r4k.bios", BIOS_SIZE);
	memory_region_set_readonly(bios, true);
	memory_region_add_subregion(get_system_memory(), 0x1fc00000, bios);

	load_image_targphys(filename, 0x1fc00000, BIOS_SIZE);
	} else if ((dinfo = drive_get(IF_PFLASH, 0, 0)) != NULL) {
	uint32_t mips_rom = 0x00400000;
	if (!pflash_cfi01_register(0x1fc00000, NULL, "mips_r4k.bios", mips_rom,
	dinfo->bdrv, sector_len,
	mips_rom / sector_len,
	4, 0, 0, 0, 0, be)) {
	fprintf(stderr, "qemu: Error registering flash memory.\n");
	}
	}
	else {
	/* not fatal */
	fprintf(stderr, "qemu: Warning, could not load MIPS bios '%s'\n",
	bios_name);
	}
	if (filename) {
	g_free(filename);
	}

	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);

	/* The PIC is attached to the MIPS CPU INT0 pin */
	isa_bus_new(NULL, get_system_io());
	i8259 = i8259_init(env->irq[2]);
	isa_bus_irqs(i8259);

	rtc_init(2000, NULL);

	/* Register 64 KB of ISA IO space at 0x14000000 */
	isa_mmio_init(0x14000000, 0x00010000);
	isa_mem_base = 0x10000000;

	pit = pit_init(0x40, 0);

	for(i = 0; i < MAX_SERIAL_PORTS; i++) {
	if (serial_hds[i]) {
	serial_isa_init(i, serial_hds[i]);
	}
	}

	isa_vga_init();

	if (nd_table[0].vlan)
	isa_ne2000_init(0x300, 9, &nd_table[0]);

	ide_drive_get(hd, MAX_IDE_BUS);
	for(i = 0; i < MAX_IDE_BUS; i++)
	isa_ide_init(ide_iobase[i], ide_iobase2[i], ide_irq[i],
	hd[MAX_IDE_DEVS * i],
	hd[MAX_IDE_DEVS * i + 1]);

	isa_create_simple("i8042");
	}

	static QEMUMachine mips_machine = {
	.name = "mips",
	.desc = "mips r4k platform",
	.init = mips_r4k_init,
	};

	static void mips_machine_init(void)
	{
	qemu_register_machine(&mips_machine);
	}

	machine_init(mips_machine_init);