hw/xtensa_lx60.c - qemu - Git at Google

 /*
  * Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *     * Redistributions of source code must retain the above copyright
  *       notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above copyright
  *       notice, this list of conditions and the following disclaimer in the
  *       documentation and/or other materials provided with the distribution.
  *     * Neither the name of the Open Source and Linux Lab nor the
  *       names of its contributors may be used to endorse or promote products
  *       derived from this software without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "sysemu/sysemu.h"
 #include "boards.h"
 #include "loader.h"
 #include "elf.h"
 #include "exec/memory.h"
 #include "exec/address-spaces.h"
 #include "serial.h"
 #include "net/net.h"
 #include "sysbus.h"
 #include "flash.h"
 #include "sysemu/blockdev.h"
 #include "qemu-char.h"
 #include "xtensa_bootparam.h"

 typedef struct LxBoardDesc {
     size_t flash_size;
     size_t flash_sector_size;
     size_t sram_size;
 } LxBoardDesc;

 typedef struct Lx60FpgaState {
     MemoryRegion iomem;
     uint32_t leds;
     uint32_t switches;
 } Lx60FpgaState;

 static void lx60_fpga_reset(void *opaque)
 {
     Lx60FpgaState *s = opaque;

     s->leds = 0;
     s->switches = 0;
 }

 static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
         unsigned size)
 {
     Lx60FpgaState *s = opaque;

     switch (addr) {
     case 0x0: /*build date code*/
         return 0x09272011;

     case 0x4: /*processor clock frequency, Hz*/
         return 10000000;

     case 0x8: /*LEDs (off = 0, on = 1)*/
         return s->leds;

     case 0xc: /*DIP switches (off = 0, on = 1)*/
         return s->switches;
     }
     return 0;
 }

 static void lx60_fpga_write(void *opaque, hwaddr addr,
         uint64_t val, unsigned size)
 {
     Lx60FpgaState *s = opaque;

     switch (addr) {
     case 0x8: /*LEDs (off = 0, on = 1)*/
         s->leds = val;
         break;

     case 0x10: /*board reset*/
         if (val == 0xdead) {
             qemu_system_reset_request();
         }
         break;
     }
 }

 static const MemoryRegionOps lx60_fpga_ops = {
     .read = lx60_fpga_read,
     .write = lx60_fpga_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };

 static Lx60FpgaState *lx60_fpga_init(MemoryRegion *address_space,
         hwaddr base)
 {
     Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));

     memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
             "lx60.fpga", 0x10000);
     memory_region_add_subregion(address_space, base, &s->iomem);
     lx60_fpga_reset(s);
     qemu_register_reset(lx60_fpga_reset, s);
     return s;
 }

 static void lx60_net_init(MemoryRegion *address_space,
         hwaddr base,
         hwaddr descriptors,
         hwaddr buffers,
         qemu_irq irq, NICInfo *nd)
 {
     DeviceState *dev;
     SysBusDevice *s;
     MemoryRegion *ram;

     dev = qdev_create(NULL, "open_eth");
     qdev_set_nic_properties(dev, nd);
     qdev_init_nofail(dev);

     s = sysbus_from_qdev(dev);
     sysbus_connect_irq(s, 0, irq);
     memory_region_add_subregion(address_space, base,
             sysbus_mmio_get_region(s, 0));
     memory_region_add_subregion(address_space, descriptors,
             sysbus_mmio_get_region(s, 1));

     ram = g_malloc(sizeof(*ram));
     memory_region_init_ram(ram, "open_eth.ram", 16384);
     vmstate_register_ram_global(ram);
     memory_region_add_subregion(address_space, buffers, ram);
 }

 static uint64_t translate_phys_addr(void *env, uint64_t addr)
 {
     return cpu_get_phys_page_debug(env, addr);
 }

 static void lx60_reset(void *opaque)
 {
     XtensaCPU *cpu = opaque;

     cpu_reset(CPU(cpu));
 }

 static void lx_init(const LxBoardDesc *board, QEMUMachineInitArgs *args)
 {
 #ifdef TARGET_WORDS_BIGENDIAN
     int be = 1;
 #else
     int be = 0;
 #endif
     MemoryRegion *system_memory = get_system_memory();
     XtensaCPU *cpu = NULL;
     CPUXtensaState *env = NULL;
     MemoryRegion *ram, *rom, *system_io;
     DriveInfo *dinfo;
     pflash_t *flash = NULL;
     const char *cpu_model = args->cpu_model;
     const char *kernel_filename = args->kernel_filename;
     const char *kernel_cmdline = args->kernel_cmdline;
     int n;

     if (!cpu_model) {
         cpu_model = XTENSA_DEFAULT_CPU_MODEL;
     }

     for (n = 0; n < smp_cpus; n++) {
         cpu = cpu_xtensa_init(cpu_model);
         if (cpu == NULL) {
             fprintf(stderr, "Unable to find CPU definition\n");
             exit(1);
         }
         env = &cpu->env;

         env->sregs[PRID] = n;
         qemu_register_reset(lx60_reset, cpu);
         /* Need MMU initialized prior to ELF loading,
          * so that ELF gets loaded into virtual addresses
          */
         cpu_reset(CPU(cpu));
     }

     ram = g_malloc(sizeof(*ram));
     memory_region_init_ram(ram, "lx60.dram", args->ram_size);
     vmstate_register_ram_global(ram);
     memory_region_add_subregion(system_memory, 0, ram);

     system_io = g_malloc(sizeof(*system_io));
     memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);
     memory_region_add_subregion(system_memory, 0xf0000000, system_io);
     lx60_fpga_init(system_io, 0x0d020000);
     if (nd_table[0].used) {
         lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
                 xtensa_get_extint(env, 1), nd_table);
     }

     if (!serial_hds[0]) {
         serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
     }

     serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
             115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);

     dinfo = drive_get(IF_PFLASH, 0, 0);
     if (dinfo) {
         flash = pflash_cfi01_register(0xf8000000,
                 NULL, "lx60.io.flash", board->flash_size,
                 dinfo->bdrv, board->flash_sector_size,
                 board->flash_size / board->flash_sector_size,
                 4, 0x0000, 0x0000, 0x0000, 0x0000, be);
         if (flash == NULL) {
             fprintf(stderr, "Unable to mount pflash\n");
             exit(1);
         }
     }

     /* Use presence of kernel file name as 'boot from SRAM' switch. */
     if (kernel_filename) {
         rom = g_malloc(sizeof(*rom));
         memory_region_init_ram(rom, "lx60.sram", board->sram_size);
         vmstate_register_ram_global(rom);
         memory_region_add_subregion(system_memory, 0xfe000000, rom);

         /* Put kernel bootparameters to the end of that SRAM */
         if (kernel_cmdline) {
             size_t cmdline_size = strlen(kernel_cmdline) + 1;
             size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
             uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;

             env->regs[2] = tagptr;

             tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
             if (cmdline_size > 1) {
                 tagptr = put_tag(tagptr, 0x1001,
                         cmdline_size, kernel_cmdline);
             }
             tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
         }
         uint64_t elf_entry;
         uint64_t elf_lowaddr;
         int success = load_elf(kernel_filename, translate_phys_addr, env,
                 &elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
         if (success > 0) {
             env->pc = elf_entry;
         }
     } else {
         if (flash) {
             MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
             MemoryRegion *flash_io = g_malloc(sizeof(*flash_io));

             memory_region_init_alias(flash_io, "lx60.flash",
                     flash_mr, 0, board->flash_size);
             memory_region_add_subregion(system_memory, 0xfe000000,
                     flash_io);
         }
     }
 }

 static void xtensa_lx60_init(QEMUMachineInitArgs *args)
 {
     static const LxBoardDesc lx60_board = {
         .flash_size = 0x400000,
         .flash_sector_size = 0x10000,
         .sram_size = 0x20000,
     };
     lx_init(&lx60_board, args);
 }

 static void xtensa_lx200_init(QEMUMachineInitArgs *args)
 {
     static const LxBoardDesc lx200_board = {
         .flash_size = 0x1000000,
         .flash_sector_size = 0x20000,
         .sram_size = 0x2000000,
     };
     lx_init(&lx200_board, args);
 }

 static QEMUMachine xtensa_lx60_machine = {
     .name = "lx60",
     .desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
     .init = xtensa_lx60_init,
     .max_cpus = 4,
 };

 static QEMUMachine xtensa_lx200_machine = {
     .name = "lx200",
     .desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
     .init = xtensa_lx200_init,
     .max_cpus = 4,
 };

 static void xtensa_lx_machines_init(void)
 {
     qemu_register_machine(&xtensa_lx60_machine);
     qemu_register_machine(&xtensa_lx200_machine);
 }

 machine_init(xtensa_lx_machines_init);
	/*
	* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
	* All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* * Neither the name of the Open Source and Linux Lab nor the
	* names of its contributors may be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
	* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "sysemu/sysemu.h"
	#include "boards.h"
	#include "loader.h"
	#include "elf.h"
	#include "exec/memory.h"
	#include "exec/address-spaces.h"
	#include "serial.h"
	#include "net/net.h"
	#include "sysbus.h"
	#include "flash.h"
	#include "sysemu/blockdev.h"
	#include "qemu-char.h"
	#include "xtensa_bootparam.h"

	typedef struct LxBoardDesc {
	size_t flash_size;
	size_t flash_sector_size;
	size_t sram_size;
	} LxBoardDesc;

	typedef struct Lx60FpgaState {
	MemoryRegion iomem;
	uint32_t leds;
	uint32_t switches;
	} Lx60FpgaState;

	static void lx60_fpga_reset(void *opaque)
	{
	Lx60FpgaState *s = opaque;

	s->leds = 0;
	s->switches = 0;
	}

	static uint64_t lx60_fpga_read(void *opaque, hwaddr addr,
	unsigned size)
	{
	Lx60FpgaState *s = opaque;

	switch (addr) {
	case 0x0: /build date code/
	return 0x09272011;

	case 0x4: /processor clock frequency, Hz/
	return 10000000;

	case 0x8: /LEDs (off = 0, on = 1)/
	return s->leds;

	case 0xc: /DIP switches (off = 0, on = 1)/
	return s->switches;
	}
	return 0;
	}

	static void lx60_fpga_write(void *opaque, hwaddr addr,
	uint64_t val, unsigned size)
	{
	Lx60FpgaState *s = opaque;

	switch (addr) {
	case 0x8: /LEDs (off = 0, on = 1)/
	s->leds = val;
	break;

	case 0x10: /board reset/
	if (val == 0xdead) {
	qemu_system_reset_request();
	}
	break;
	}
	}

	static const MemoryRegionOps lx60_fpga_ops = {
	.read = lx60_fpga_read,
	.write = lx60_fpga_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	};

	static Lx60FpgaState lx60_fpga_init(MemoryRegion address_space,
	hwaddr base)
	{
	Lx60FpgaState *s = g_malloc(sizeof(Lx60FpgaState));

	memory_region_init_io(&s->iomem, &lx60_fpga_ops, s,
	"lx60.fpga", 0x10000);
	memory_region_add_subregion(address_space, base, &s->iomem);
	lx60_fpga_reset(s);
	qemu_register_reset(lx60_fpga_reset, s);
	return s;
	}

	static void lx60_net_init(MemoryRegion *address_space,
	hwaddr base,
	hwaddr descriptors,
	hwaddr buffers,
	qemu_irq irq, NICInfo *nd)
	{
	DeviceState *dev;
	SysBusDevice *s;
	MemoryRegion *ram;

	dev = qdev_create(NULL, "open_eth");
	qdev_set_nic_properties(dev, nd);
	qdev_init_nofail(dev);

	s = sysbus_from_qdev(dev);
	sysbus_connect_irq(s, 0, irq);
	memory_region_add_subregion(address_space, base,
	sysbus_mmio_get_region(s, 0));
	memory_region_add_subregion(address_space, descriptors,
	sysbus_mmio_get_region(s, 1));

	ram = g_malloc(sizeof(*ram));
	memory_region_init_ram(ram, "open_eth.ram", 16384);
	vmstate_register_ram_global(ram);
	memory_region_add_subregion(address_space, buffers, ram);
	}

	static uint64_t translate_phys_addr(void *env, uint64_t addr)
	{
	return cpu_get_phys_page_debug(env, addr);
	}

	static void lx60_reset(void *opaque)
	{
	XtensaCPU *cpu = opaque;

	cpu_reset(CPU(cpu));
	}

	static void lx_init(const LxBoardDesc board, QEMUMachineInitArgs args)
	{
	#ifdef TARGET_WORDS_BIGENDIAN
	int be = 1;
	#else
	int be = 0;
	#endif
	MemoryRegion *system_memory = get_system_memory();
	XtensaCPU *cpu = NULL;
	CPUXtensaState *env = NULL;
	MemoryRegion ram, rom, *system_io;
	DriveInfo *dinfo;
	pflash_t *flash = NULL;
	const char *cpu_model = args->cpu_model;
	const char *kernel_filename = args->kernel_filename;
	const char *kernel_cmdline = args->kernel_cmdline;
	int n;

	if (!cpu_model) {
	cpu_model = XTENSA_DEFAULT_CPU_MODEL;
	}

	for (n = 0; n < smp_cpus; n++) {
	cpu = cpu_xtensa_init(cpu_model);
	if (cpu == NULL) {
	fprintf(stderr, "Unable to find CPU definition\n");
	exit(1);
	}
	env = &cpu->env;

	env->sregs[PRID] = n;
	qemu_register_reset(lx60_reset, cpu);
	/* Need MMU initialized prior to ELF loading,
	* so that ELF gets loaded into virtual addresses
	*/
	cpu_reset(CPU(cpu));
	}

	ram = g_malloc(sizeof(*ram));
	memory_region_init_ram(ram, "lx60.dram", args->ram_size);
	vmstate_register_ram_global(ram);
	memory_region_add_subregion(system_memory, 0, ram);

	system_io = g_malloc(sizeof(*system_io));
	memory_region_init(system_io, "lx60.io", 224 * 1024 * 1024);
	memory_region_add_subregion(system_memory, 0xf0000000, system_io);
	lx60_fpga_init(system_io, 0x0d020000);
	if (nd_table[0].used) {
	lx60_net_init(system_io, 0x0d030000, 0x0d030400, 0x0d800000,
	xtensa_get_extint(env, 1), nd_table);
	}

	if (!serial_hds[0]) {
	serial_hds[0] = qemu_chr_new("serial0", "null", NULL);
	}

	serial_mm_init(system_io, 0x0d050020, 2, xtensa_get_extint(env, 0),
	115200, serial_hds[0], DEVICE_NATIVE_ENDIAN);

	dinfo = drive_get(IF_PFLASH, 0, 0);
	if (dinfo) {
	flash = pflash_cfi01_register(0xf8000000,
	NULL, "lx60.io.flash", board->flash_size,
	dinfo->bdrv, board->flash_sector_size,
	board->flash_size / board->flash_sector_size,
	4, 0x0000, 0x0000, 0x0000, 0x0000, be);
	if (flash == NULL) {
	fprintf(stderr, "Unable to mount pflash\n");
	exit(1);
	}
	}

	/* Use presence of kernel file name as 'boot from SRAM' switch. */
	if (kernel_filename) {
	rom = g_malloc(sizeof(*rom));
	memory_region_init_ram(rom, "lx60.sram", board->sram_size);
	vmstate_register_ram_global(rom);
	memory_region_add_subregion(system_memory, 0xfe000000, rom);

	/* Put kernel bootparameters to the end of that SRAM */
	if (kernel_cmdline) {
	size_t cmdline_size = strlen(kernel_cmdline) + 1;
	size_t bp_size = sizeof(BpTag[4]) + cmdline_size;
	uint32_t tagptr = (0xfe000000 + board->sram_size - bp_size) & ~0xff;

	env->regs[2] = tagptr;

	tagptr = put_tag(tagptr, 0x7b0b, 0, NULL);
	if (cmdline_size > 1) {
	tagptr = put_tag(tagptr, 0x1001,
	cmdline_size, kernel_cmdline);
	}
	tagptr = put_tag(tagptr, 0x7e0b, 0, NULL);
	}
	uint64_t elf_entry;
	uint64_t elf_lowaddr;
	int success = load_elf(kernel_filename, translate_phys_addr, env,
	&elf_entry, &elf_lowaddr, NULL, be, ELF_MACHINE, 0);
	if (success > 0) {
	env->pc = elf_entry;
	}
	} else {
	if (flash) {
	MemoryRegion *flash_mr = pflash_cfi01_get_memory(flash);
	MemoryRegion flash_io = g_malloc(sizeof(flash_io));

	memory_region_init_alias(flash_io, "lx60.flash",
	flash_mr, 0, board->flash_size);
	memory_region_add_subregion(system_memory, 0xfe000000,
	flash_io);
	}
	}
	}

	static void xtensa_lx60_init(QEMUMachineInitArgs *args)
	{
	static const LxBoardDesc lx60_board = {
	.flash_size = 0x400000,
	.flash_sector_size = 0x10000,
	.sram_size = 0x20000,
	};
	lx_init(&lx60_board, args);
	}

	static void xtensa_lx200_init(QEMUMachineInitArgs *args)
	{
	static const LxBoardDesc lx200_board = {
	.flash_size = 0x1000000,
	.flash_sector_size = 0x20000,
	.sram_size = 0x2000000,
	};
	lx_init(&lx200_board, args);
	}

	static QEMUMachine xtensa_lx60_machine = {
	.name = "lx60",
	.desc = "lx60 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
	.init = xtensa_lx60_init,
	.max_cpus = 4,
	};

	static QEMUMachine xtensa_lx200_machine = {
	.name = "lx200",
	.desc = "lx200 EVB (" XTENSA_DEFAULT_CPU_MODEL ")",
	.init = xtensa_lx200_init,
	.max_cpus = 4,
	};

	static void xtensa_lx_machines_init(void)
	{
	qemu_register_machine(&xtensa_lx60_machine);
	qemu_register_machine(&xtensa_lx200_machine);
	}

	machine_init(xtensa_lx_machines_init);