hw/sparc/leon3.c - third_party/qemu - Git at Google

 /*
  * QEMU Leon3 System Emulator
  *
  * Copyright (c) 2010-2019 AdaCore
  *
  * 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 "qemu/units.h"
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "qemu/datadir.h"
 #include "cpu.h"
 #include "hw/irq.h"
 #include "qemu/timer.h"
 #include "hw/ptimer.h"
 #include "hw/qdev-properties.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/qtest.h"
 #include "sysemu/reset.h"
 #include "hw/boards.h"
 #include "hw/loader.h"
 #include "elf.h"
 #include "trace.h"

 #include "hw/sparc/grlib.h"
 #include "hw/misc/grlib_ahb_apb_pnp.h"

 /* Default system clock.  */
 #define CPU_CLK (40 * 1000 * 1000)

 #define LEON3_PROM_FILENAME "u-boot.bin"
 #define LEON3_PROM_OFFSET    (0x00000000)
 #define LEON3_RAM_OFFSET     (0x40000000)

 #define LEON3_UART_OFFSET  (0x80000100)
 #define LEON3_UART_IRQ     (3)

 #define LEON3_IRQMP_OFFSET (0x80000200)

 #define LEON3_TIMER_OFFSET (0x80000300)
 #define LEON3_TIMER_IRQ    (6)
 #define LEON3_TIMER_COUNT  (2)

 #define LEON3_APB_PNP_OFFSET (0x800FF000)
 #define LEON3_AHB_PNP_OFFSET (0xFFFFF000)

 typedef struct ResetData {
     SPARCCPU *cpu;
     uint32_t  entry;            /* save kernel entry in case of reset */
     target_ulong sp;            /* initial stack pointer */
 } ResetData;

 static uint32_t *gen_store_u32(uint32_t *code, hwaddr addr, uint32_t val)
 {
     stl_p(code++, 0x82100000); /* mov %g0, %g1                */
     stl_p(code++, 0x84100000); /* mov %g0, %g2                */
     stl_p(code++, 0x03000000 +
       extract32(addr, 10, 22));
                                /* sethi %hi(addr), %g1        */
     stl_p(code++, 0x82106000 +
       extract32(addr, 0, 10));
                                /* or %g1, addr, %g1           */
     stl_p(code++, 0x05000000 +
       extract32(val, 10, 22));
                                /* sethi %hi(val), %g2         */
     stl_p(code++, 0x8410a000 +
       extract32(val, 0, 10));
                                /* or %g2, val, %g2            */
     stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ]             */

     return code;
 }

 /*
  * When loading a kernel in RAM the machine is expected to be in a different
  * state (eg: initialized by the bootloader). This little code reproduces
  * this behavior.
  */
 static void write_bootloader(CPUSPARCState *env, uint8_t *base,
                              hwaddr kernel_addr)
 {
     uint32_t *p = (uint32_t *) base;

     /* Initialize the UARTs                                        */
     /* *UART_CONTROL = UART_RECEIVE_ENABLE | UART_TRANSMIT_ENABLE; */
     p = gen_store_u32(p, 0x80000108, 3);

     /* Initialize the TIMER 0                                      */
     /* *GPTIMER_SCALER_RELOAD = 40 - 1;                            */
     p = gen_store_u32(p, 0x80000304, 39);
     /* *GPTIMER0_COUNTER_RELOAD = 0xFFFE;                          */
     p = gen_store_u32(p, 0x80000314, 0xFFFFFFFE);
     /* *GPTIMER0_CONFIG = GPTIMER_ENABLE | GPTIMER_RESTART;        */
     p = gen_store_u32(p, 0x80000318, 3);

     /* JUMP to the entry point                                     */
     stl_p(p++, 0x82100000); /* mov %g0, %g1 */
     stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22));
                             /* sethi %hi(kernel_addr), %g1 */
     stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10));
                             /* or kernel_addr, %g1 */
     stl_p(p++, 0x81c04000); /* jmp  %g1 */
     stl_p(p++, 0x01000000); /* nop */
 }

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

     cpu_reset(cpu);

     cpu->halted = 0;
     env->pc     = s->entry;
     env->npc    = s->entry + 4;
     env->regbase[6] = s->sp;
 }

 static void leon3_cache_control_int(CPUSPARCState *env)
 {
     uint32_t state = 0;

     if (env->cache_control & CACHE_CTRL_IF) {
         /* Instruction cache state */
         state = env->cache_control & CACHE_STATE_MASK;
         if (state == CACHE_ENABLED) {
             state = CACHE_FROZEN;
             trace_int_helper_icache_freeze();
         }

         env->cache_control &= ~CACHE_STATE_MASK;
         env->cache_control |= state;
     }

     if (env->cache_control & CACHE_CTRL_DF) {
         /* Data cache state */
         state = (env->cache_control >> 2) & CACHE_STATE_MASK;
         if (state == CACHE_ENABLED) {
             state = CACHE_FROZEN;
             trace_int_helper_dcache_freeze();
         }

         env->cache_control &= ~(CACHE_STATE_MASK << 2);
         env->cache_control |= (state << 2);
     }
 }

 static void leon3_irq_ack(void *irq_manager, int intno)
 {
     grlib_irqmp_ack((DeviceState *)irq_manager, intno);
 }

 /*
  * This device assumes that the incoming 'level' value on the
  * qemu_irq is the interrupt number, not just a simple 0/1 level.
  */
 static void leon3_set_pil_in(void *opaque, int n, int level)
 {
     CPUSPARCState *env = opaque;
     uint32_t pil_in = level;
     CPUState *cs;

     assert(env != NULL);

     env->pil_in = pil_in;

     if (env->pil_in && (env->interrupt_index == 0 ||
                         (env->interrupt_index & ~15) == TT_EXTINT)) {
         unsigned int i;

         for (i = 15; i > 0; i--) {
             if (env->pil_in & (1 << i)) {
                 int old_interrupt = env->interrupt_index;

                 env->interrupt_index = TT_EXTINT | i;
                 if (old_interrupt != env->interrupt_index) {
                     cs = env_cpu(env);
                     trace_leon3_set_irq(i);
                     cpu_interrupt(cs, CPU_INTERRUPT_HARD);
                 }
                 break;
             }
         }
     } else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
         cs = env_cpu(env);
         trace_leon3_reset_irq(env->interrupt_index & 15);
         env->interrupt_index = 0;
         cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
     }
 }

 static void leon3_irq_manager(CPUSPARCState *env, void *irq_manager, int intno)
 {
     leon3_irq_ack(irq_manager, intno);
     leon3_cache_control_int(env);
 }

 static void leon3_generic_hw_init(MachineState *machine)
 {
     ram_addr_t ram_size = machine->ram_size;
     const char *bios_name = machine->firmware ?: LEON3_PROM_FILENAME;
     const char *kernel_filename = machine->kernel_filename;
     SPARCCPU *cpu;
     CPUSPARCState   *env;
     MemoryRegion *address_space_mem = get_system_memory();
     MemoryRegion *prom = g_new(MemoryRegion, 1);
     int         ret;
     char       *filename;
     int         bios_size;
     int         prom_size;
     ResetData  *reset_info;
     DeviceState *dev, *irqmpdev;
     int i;
     AHBPnp *ahb_pnp;
     APBPnp *apb_pnp;

     /* Init CPU */
     cpu = SPARC_CPU(cpu_create(machine->cpu_type));
     env = &cpu->env;

     cpu_sparc_set_id(env, 0);

     /* Reset data */
     reset_info        = g_new0(ResetData, 1);
     reset_info->cpu   = cpu;
     reset_info->sp    = LEON3_RAM_OFFSET + ram_size;
     qemu_register_reset(main_cpu_reset, reset_info);

     ahb_pnp = GRLIB_AHB_PNP(qdev_new(TYPE_GRLIB_AHB_PNP));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(ahb_pnp), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(ahb_pnp), 0, LEON3_AHB_PNP_OFFSET);
     grlib_ahb_pnp_add_entry(ahb_pnp, 0, 0, GRLIB_VENDOR_GAISLER,
                             GRLIB_LEON3_DEV, GRLIB_AHB_MASTER,
                             GRLIB_CPU_AREA);

     apb_pnp = GRLIB_APB_PNP(qdev_new(TYPE_GRLIB_APB_PNP));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(apb_pnp), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(apb_pnp), 0, LEON3_APB_PNP_OFFSET);
     grlib_ahb_pnp_add_entry(ahb_pnp, LEON3_APB_PNP_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_APBMST_DEV,
                             GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA);

     /* Allocate IRQ manager */
     irqmpdev = qdev_new(TYPE_GRLIB_IRQMP);
     qdev_init_gpio_in_named_with_opaque(DEVICE(cpu), leon3_set_pil_in,
                                         env, "pil", 1);
     qdev_connect_gpio_out_named(irqmpdev, "grlib-irq", 0,
                                 qdev_get_gpio_in_named(DEVICE(cpu), "pil", 0));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(irqmpdev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(irqmpdev), 0, LEON3_IRQMP_OFFSET);
     env->irq_manager = irqmpdev;
     env->qemu_irq_ack = leon3_irq_manager;
     grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV,
                             2, 0, GRLIB_APBIO_AREA);

     /* Allocate RAM */
     if (ram_size > 1 * GiB) {
         error_report("Too much memory for this machine: %" PRId64 "MB,"
                      " maximum 1G",
                      ram_size / MiB);
         exit(1);
     }

     memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET,
                                 machine->ram);

     /* Allocate BIOS */
     prom_size = 8 * MiB;
     memory_region_init_rom(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
     memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom);

     /* Load boot prom */
     filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

     if (filename) {
         bios_size = get_image_size(filename);
     } else {
         bios_size = -1;
     }

     if (bios_size > prom_size) {
         error_report("could not load prom '%s': file too big", filename);
         exit(1);
     }

     if (bios_size > 0) {
         ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size);
         if (ret < 0 || ret > prom_size) {
             error_report("could not load prom '%s'", filename);
             exit(1);
         }
     } else if (kernel_filename == NULL && !qtest_enabled()) {
         error_report("Can't read bios image '%s'", filename
                                                    ? filename
                                                    : LEON3_PROM_FILENAME);
         exit(1);
     }
     g_free(filename);

     /* Can directly load an application. */
     if (kernel_filename != NULL) {
         long     kernel_size;
         uint64_t entry;

         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
                                &entry, NULL, NULL, NULL,
                                1 /* big endian */, EM_SPARC, 0, 0);
         if (kernel_size < 0) {
             kernel_size = load_uimage(kernel_filename, NULL, &entry,
                                       NULL, NULL, NULL);
         }
         if (kernel_size < 0) {
             error_report("could not load kernel '%s'", kernel_filename);
             exit(1);
         }
         if (bios_size <= 0) {
             /*
              * If there is no bios/monitor just start the application but put
              * the machine in an initialized state through a little
              * bootloader.
              */
             uint8_t *bootloader_entry;

             bootloader_entry = memory_region_get_ram_ptr(prom);
             write_bootloader(env, bootloader_entry, entry);
             env->pc = LEON3_PROM_OFFSET;
             env->npc = LEON3_PROM_OFFSET + 4;
             reset_info->entry = LEON3_PROM_OFFSET;
         }
     }

     /* Allocate timers */
     dev = qdev_new(TYPE_GRLIB_GPTIMER);
     qdev_prop_set_uint32(dev, "nr-timers", LEON3_TIMER_COUNT);
     qdev_prop_set_uint32(dev, "frequency", CPU_CLK);
     qdev_prop_set_uint32(dev, "irq-line", LEON3_TIMER_IRQ);
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);

     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET);
     for (i = 0; i < LEON3_TIMER_COUNT; i++) {
         sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
                            qdev_get_gpio_in(irqmpdev, LEON3_TIMER_IRQ + i));
     }

     grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_GPTIMER_DEV,
                             0, LEON3_TIMER_IRQ, GRLIB_APBIO_AREA);

     /* Allocate uart */
     dev = qdev_new(TYPE_GRLIB_APB_UART);
     qdev_prop_set_chr(dev, "chrdev", serial_hd(0));
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET);
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
                        qdev_get_gpio_in(irqmpdev, LEON3_UART_IRQ));
     grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF,
                             GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1,
                             LEON3_UART_IRQ, GRLIB_APBIO_AREA);
 }

 static void leon3_generic_machine_init(MachineClass *mc)
 {
     mc->desc = "Leon-3 generic";
     mc->init = leon3_generic_hw_init;
     mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3");
     mc->default_ram_id = "leon3.ram";
 }

 DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)
	/*
	* QEMU Leon3 System Emulator
	*
	* Copyright (c) 2010-2019 AdaCore
	*
	* 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 "qemu/units.h"
	#include "qemu/error-report.h"
	#include "qapi/error.h"
	#include "qemu-common.h"
	#include "qemu/datadir.h"
	#include "cpu.h"
	#include "hw/irq.h"
	#include "qemu/timer.h"
	#include "hw/ptimer.h"
	#include "hw/qdev-properties.h"
	#include "sysemu/sysemu.h"
	#include "sysemu/qtest.h"
	#include "sysemu/reset.h"
	#include "hw/boards.h"
	#include "hw/loader.h"
	#include "elf.h"
	#include "trace.h"

	#include "hw/sparc/grlib.h"
	#include "hw/misc/grlib_ahb_apb_pnp.h"

	/* Default system clock. */
	#define CPU_CLK (40 * 1000 * 1000)

	#define LEON3_PROM_FILENAME "u-boot.bin"
	#define LEON3_PROM_OFFSET (0x00000000)
	#define LEON3_RAM_OFFSET (0x40000000)

	#define LEON3_UART_OFFSET (0x80000100)
	#define LEON3_UART_IRQ (3)

	#define LEON3_IRQMP_OFFSET (0x80000200)

	#define LEON3_TIMER_OFFSET (0x80000300)
	#define LEON3_TIMER_IRQ (6)
	#define LEON3_TIMER_COUNT (2)

	#define LEON3_APB_PNP_OFFSET (0x800FF000)
	#define LEON3_AHB_PNP_OFFSET (0xFFFFF000)

	typedef struct ResetData {
	SPARCCPU *cpu;
	uint32_t entry; /* save kernel entry in case of reset */
	target_ulong sp; /* initial stack pointer */
	} ResetData;

	static uint32_t gen_store_u32(uint32_t code, hwaddr addr, uint32_t val)
	{
	stl_p(code++, 0x82100000); /* mov %g0, %g1 */
	stl_p(code++, 0x84100000); /* mov %g0, %g2 */
	stl_p(code++, 0x03000000 +
	extract32(addr, 10, 22));
	/* sethi %hi(addr), %g1 */
	stl_p(code++, 0x82106000 +
	extract32(addr, 0, 10));
	/* or %g1, addr, %g1 */
	stl_p(code++, 0x05000000 +
	extract32(val, 10, 22));
	/* sethi %hi(val), %g2 */
	stl_p(code++, 0x8410a000 +
	extract32(val, 0, 10));
	/* or %g2, val, %g2 */
	stl_p(code++, 0xc4204000); /* st %g2, [ %g1 ] */

	return code;
	}

	/*
	* When loading a kernel in RAM the machine is expected to be in a different
	* state (eg: initialized by the bootloader). This little code reproduces
	* this behavior.
	*/
	static void write_bootloader(CPUSPARCState env, uint8_t base,
	hwaddr kernel_addr)
	{
	uint32_t p = (uint32_t ) base;

	/* Initialize the UARTs */
	/* UART_CONTROL = UART_RECEIVE_ENABLE \| UART_TRANSMIT_ENABLE; /
	p = gen_store_u32(p, 0x80000108, 3);

	/* Initialize the TIMER 0 */
	/* GPTIMER_SCALER_RELOAD = 40 - 1; /
	p = gen_store_u32(p, 0x80000304, 39);
	/* GPTIMER0_COUNTER_RELOAD = 0xFFFE; /
	p = gen_store_u32(p, 0x80000314, 0xFFFFFFFE);
	/* GPTIMER0_CONFIG = GPTIMER_ENABLE \| GPTIMER_RESTART; /
	p = gen_store_u32(p, 0x80000318, 3);

	/* JUMP to the entry point */
	stl_p(p++, 0x82100000); /* mov %g0, %g1 */
	stl_p(p++, 0x03000000 + extract32(kernel_addr, 10, 22));
	/* sethi %hi(kernel_addr), %g1 */
	stl_p(p++, 0x82106000 + extract32(kernel_addr, 0, 10));
	/* or kernel_addr, %g1 */
	stl_p(p++, 0x81c04000); /* jmp %g1 */
	stl_p(p++, 0x01000000); /* nop */
	}

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

	cpu_reset(cpu);

	cpu->halted = 0;
	env->pc = s->entry;
	env->npc = s->entry + 4;
	env->regbase[6] = s->sp;
	}

	static void leon3_cache_control_int(CPUSPARCState *env)
	{
	uint32_t state = 0;

	if (env->cache_control & CACHE_CTRL_IF) {
	/* Instruction cache state */
	state = env->cache_control & CACHE_STATE_MASK;
	if (state == CACHE_ENABLED) {
	state = CACHE_FROZEN;
	trace_int_helper_icache_freeze();
	}

	env->cache_control &= ~CACHE_STATE_MASK;
	env->cache_control \|= state;
	}

	if (env->cache_control & CACHE_CTRL_DF) {
	/* Data cache state */
	state = (env->cache_control >> 2) & CACHE_STATE_MASK;
	if (state == CACHE_ENABLED) {
	state = CACHE_FROZEN;
	trace_int_helper_dcache_freeze();
	}

	env->cache_control &= ~(CACHE_STATE_MASK << 2);
	env->cache_control \|= (state << 2);
	}
	}

	static void leon3_irq_ack(void *irq_manager, int intno)
	{
	grlib_irqmp_ack((DeviceState *)irq_manager, intno);
	}

	/*
	* This device assumes that the incoming 'level' value on the
	* qemu_irq is the interrupt number, not just a simple 0/1 level.
	*/
	static void leon3_set_pil_in(void *opaque, int n, int level)
	{
	CPUSPARCState *env = opaque;
	uint32_t pil_in = level;
	CPUState *cs;

	assert(env != NULL);

	env->pil_in = pil_in;

	if (env->pil_in && (env->interrupt_index == 0 \|\|
	(env->interrupt_index & ~15) == TT_EXTINT)) {
	unsigned int i;

	for (i = 15; i > 0; i--) {
	if (env->pil_in & (1 << i)) {
	int old_interrupt = env->interrupt_index;

	env->interrupt_index = TT_EXTINT \| i;
	if (old_interrupt != env->interrupt_index) {
	cs = env_cpu(env);
	trace_leon3_set_irq(i);
	cpu_interrupt(cs, CPU_INTERRUPT_HARD);
	}
	break;
	}
	}
	} else if (!env->pil_in && (env->interrupt_index & ~15) == TT_EXTINT) {
	cs = env_cpu(env);
	trace_leon3_reset_irq(env->interrupt_index & 15);
	env->interrupt_index = 0;
	cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
	}
	}

	static void leon3_irq_manager(CPUSPARCState env, void irq_manager, int intno)
	{
	leon3_irq_ack(irq_manager, intno);
	leon3_cache_control_int(env);
	}

	static void leon3_generic_hw_init(MachineState *machine)
	{
	ram_addr_t ram_size = machine->ram_size;
	const char *bios_name = machine->firmware ?: LEON3_PROM_FILENAME;
	const char *kernel_filename = machine->kernel_filename;
	SPARCCPU *cpu;
	CPUSPARCState *env;
	MemoryRegion *address_space_mem = get_system_memory();
	MemoryRegion *prom = g_new(MemoryRegion, 1);
	int ret;
	char *filename;
	int bios_size;
	int prom_size;
	ResetData *reset_info;
	DeviceState dev, irqmpdev;
	int i;
	AHBPnp *ahb_pnp;
	APBPnp *apb_pnp;

	/* Init CPU */
	cpu = SPARC_CPU(cpu_create(machine->cpu_type));
	env = &cpu->env;

	cpu_sparc_set_id(env, 0);

	/* Reset data */
	reset_info = g_new0(ResetData, 1);
	reset_info->cpu = cpu;
	reset_info->sp = LEON3_RAM_OFFSET + ram_size;
	qemu_register_reset(main_cpu_reset, reset_info);

	ahb_pnp = GRLIB_AHB_PNP(qdev_new(TYPE_GRLIB_AHB_PNP));
	sysbus_realize_and_unref(SYS_BUS_DEVICE(ahb_pnp), &error_fatal);
	sysbus_mmio_map(SYS_BUS_DEVICE(ahb_pnp), 0, LEON3_AHB_PNP_OFFSET);
	grlib_ahb_pnp_add_entry(ahb_pnp, 0, 0, GRLIB_VENDOR_GAISLER,
	GRLIB_LEON3_DEV, GRLIB_AHB_MASTER,
	GRLIB_CPU_AREA);

	apb_pnp = GRLIB_APB_PNP(qdev_new(TYPE_GRLIB_APB_PNP));
	sysbus_realize_and_unref(SYS_BUS_DEVICE(apb_pnp), &error_fatal);
	sysbus_mmio_map(SYS_BUS_DEVICE(apb_pnp), 0, LEON3_APB_PNP_OFFSET);
	grlib_ahb_pnp_add_entry(ahb_pnp, LEON3_APB_PNP_OFFSET, 0xFFF,
	GRLIB_VENDOR_GAISLER, GRLIB_APBMST_DEV,
	GRLIB_AHB_SLAVE, GRLIB_AHBMEM_AREA);

	/* Allocate IRQ manager */
	irqmpdev = qdev_new(TYPE_GRLIB_IRQMP);
	qdev_init_gpio_in_named_with_opaque(DEVICE(cpu), leon3_set_pil_in,
	env, "pil", 1);
	qdev_connect_gpio_out_named(irqmpdev, "grlib-irq", 0,
	qdev_get_gpio_in_named(DEVICE(cpu), "pil", 0));
	sysbus_realize_and_unref(SYS_BUS_DEVICE(irqmpdev), &error_fatal);
	sysbus_mmio_map(SYS_BUS_DEVICE(irqmpdev), 0, LEON3_IRQMP_OFFSET);
	env->irq_manager = irqmpdev;
	env->qemu_irq_ack = leon3_irq_manager;
	grlib_apb_pnp_add_entry(apb_pnp, LEON3_IRQMP_OFFSET, 0xFFF,
	GRLIB_VENDOR_GAISLER, GRLIB_IRQMP_DEV,
	2, 0, GRLIB_APBIO_AREA);

	/* Allocate RAM */
	if (ram_size > 1 * GiB) {
	error_report("Too much memory for this machine: %" PRId64 "MB,"
	" maximum 1G",
	ram_size / MiB);
	exit(1);
	}

	memory_region_add_subregion(address_space_mem, LEON3_RAM_OFFSET,
	machine->ram);

	/* Allocate BIOS */
	prom_size = 8 * MiB;
	memory_region_init_rom(prom, NULL, "Leon3.bios", prom_size, &error_fatal);
	memory_region_add_subregion(address_space_mem, LEON3_PROM_OFFSET, prom);

	/* Load boot prom */
	filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);

	if (filename) {
	bios_size = get_image_size(filename);
	} else {
	bios_size = -1;
	}

	if (bios_size > prom_size) {
	error_report("could not load prom '%s': file too big", filename);
	exit(1);
	}

	if (bios_size > 0) {
	ret = load_image_targphys(filename, LEON3_PROM_OFFSET, bios_size);
	if (ret < 0 \|\| ret > prom_size) {
	error_report("could not load prom '%s'", filename);
	exit(1);
	}
	} else if (kernel_filename == NULL && !qtest_enabled()) {
	error_report("Can't read bios image '%s'", filename
	? filename
	: LEON3_PROM_FILENAME);
	exit(1);
	}
	g_free(filename);

	/* Can directly load an application. */
	if (kernel_filename != NULL) {
	long kernel_size;
	uint64_t entry;

	kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
	&entry, NULL, NULL, NULL,
	1 /* big endian */, EM_SPARC, 0, 0);
	if (kernel_size < 0) {
	kernel_size = load_uimage(kernel_filename, NULL, &entry,
	NULL, NULL, NULL);
	}
	if (kernel_size < 0) {
	error_report("could not load kernel '%s'", kernel_filename);
	exit(1);
	}
	if (bios_size <= 0) {
	/*
	* If there is no bios/monitor just start the application but put
	* the machine in an initialized state through a little
	* bootloader.
	*/
	uint8_t *bootloader_entry;

	bootloader_entry = memory_region_get_ram_ptr(prom);
	write_bootloader(env, bootloader_entry, entry);
	env->pc = LEON3_PROM_OFFSET;
	env->npc = LEON3_PROM_OFFSET + 4;
	reset_info->entry = LEON3_PROM_OFFSET;
	}
	}

	/* Allocate timers */
	dev = qdev_new(TYPE_GRLIB_GPTIMER);
	qdev_prop_set_uint32(dev, "nr-timers", LEON3_TIMER_COUNT);
	qdev_prop_set_uint32(dev, "frequency", CPU_CLK);
	qdev_prop_set_uint32(dev, "irq-line", LEON3_TIMER_IRQ);
	sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);

	sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_TIMER_OFFSET);
	for (i = 0; i < LEON3_TIMER_COUNT; i++) {
	sysbus_connect_irq(SYS_BUS_DEVICE(dev), i,
	qdev_get_gpio_in(irqmpdev, LEON3_TIMER_IRQ + i));
	}

	grlib_apb_pnp_add_entry(apb_pnp, LEON3_TIMER_OFFSET, 0xFFF,
	GRLIB_VENDOR_GAISLER, GRLIB_GPTIMER_DEV,
	0, LEON3_TIMER_IRQ, GRLIB_APBIO_AREA);

	/* Allocate uart */
	dev = qdev_new(TYPE_GRLIB_APB_UART);
	qdev_prop_set_chr(dev, "chrdev", serial_hd(0));
	sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
	sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, LEON3_UART_OFFSET);
	sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0,
	qdev_get_gpio_in(irqmpdev, LEON3_UART_IRQ));
	grlib_apb_pnp_add_entry(apb_pnp, LEON3_UART_OFFSET, 0xFFF,
	GRLIB_VENDOR_GAISLER, GRLIB_APBUART_DEV, 1,
	LEON3_UART_IRQ, GRLIB_APBIO_AREA);
	}

	static void leon3_generic_machine_init(MachineClass *mc)
	{
	mc->desc = "Leon-3 generic";
	mc->init = leon3_generic_hw_init;
	mc->default_cpu_type = SPARC_CPU_TYPE_NAME("LEON3");
	mc->default_ram_id = "leon3.ram";
	}

	DEFINE_MACHINE("leon3_generic", leon3_generic_machine_init)