hw/intc/bcm2836_control.c - qemu-android - Git at Google

 /*
  * Rasperry Pi 2 emulation ARM control logic module.
  * Copyright (c) 2015, Microsoft
  * Written by Andrew Baumann
  *
  * Based on bcm2835_ic.c (Raspberry Pi emulation) (c) 2012 Gregory Estrade
  * This code is licensed under the GNU GPLv2 and later.
  *
  * At present, only implements interrupt routing, and mailboxes (i.e.,
  * not local timer, PMU interrupt, or AXI counters).
  *
  * Ref:
  * https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3.4.pdf
  */

 #include "qemu/osdep.h"
 #include "hw/intc/bcm2836_control.h"
 #include "qemu/log.h"

 #define REG_GPU_ROUTE           0x0c
 #define REG_TIMERCONTROL        0x40
 #define REG_MBOXCONTROL         0x50
 #define REG_IRQSRC              0x60
 #define REG_FIQSRC              0x70
 #define REG_MBOX0_WR            0x80
 #define REG_MBOX0_RDCLR         0xc0
 #define REG_LIMIT              0x100

 #define IRQ_BIT(cntrl, num) (((cntrl) & (1 << (num))) != 0)
 #define FIQ_BIT(cntrl, num) (((cntrl) & (1 << ((num) + 4))) != 0)

 #define IRQ_CNTPSIRQ    0
 #define IRQ_CNTPNSIRQ   1
 #define IRQ_CNTHPIRQ    2
 #define IRQ_CNTVIRQ     3
 #define IRQ_MAILBOX0    4
 #define IRQ_MAILBOX1    5
 #define IRQ_MAILBOX2    6
 #define IRQ_MAILBOX3    7
 #define IRQ_GPU         8
 #define IRQ_PMU         9
 #define IRQ_AXI         10
 #define IRQ_TIMER       11
 #define IRQ_MAX         IRQ_TIMER

 static void deliver_local(BCM2836ControlState *s, uint8_t core, uint8_t irq,
                           uint32_t controlreg, uint8_t controlidx)
 {
     if (FIQ_BIT(controlreg, controlidx)) {
         /* deliver a FIQ */
         s->fiqsrc[core] |= (uint32_t)1 << irq;
     } else if (IRQ_BIT(controlreg, controlidx)) {
         /* deliver an IRQ */
         s->irqsrc[core] |= (uint32_t)1 << irq;
     } else {
         /* the interrupt is masked */
     }
 }

 /* Update interrupts.  */
 static void bcm2836_control_update(BCM2836ControlState *s)
 {
     int i, j;

     /* reset pending IRQs/FIQs */
     for (i = 0; i < BCM2836_NCORES; i++) {
         s->irqsrc[i] = s->fiqsrc[i] = 0;
     }

     /* apply routing logic, update status regs */
     if (s->gpu_irq) {
         assert(s->route_gpu_irq < BCM2836_NCORES);
         s->irqsrc[s->route_gpu_irq] |= (uint32_t)1 << IRQ_GPU;
     }

     if (s->gpu_fiq) {
         assert(s->route_gpu_fiq < BCM2836_NCORES);
         s->fiqsrc[s->route_gpu_fiq] |= (uint32_t)1 << IRQ_GPU;
     }

     for (i = 0; i < BCM2836_NCORES; i++) {
         /* handle local timer interrupts for this core */
         if (s->timerirqs[i]) {
             assert(s->timerirqs[i] < (1 << (IRQ_CNTVIRQ + 1))); /* sane mask? */
             for (j = 0; j <= IRQ_CNTVIRQ; j++) {
                 if ((s->timerirqs[i] & (1 << j)) != 0) {
                     /* local interrupt j is set */
                     deliver_local(s, i, j, s->timercontrol[i], j);
                 }
             }
         }

         /* handle mailboxes for this core */
         for (j = 0; j < BCM2836_MBPERCORE; j++) {
             if (s->mailboxes[i * BCM2836_MBPERCORE + j] != 0) {
                 /* mailbox j is set */
                 deliver_local(s, i, j + IRQ_MAILBOX0, s->mailboxcontrol[i], j);
             }
         }
     }

     /* call set_irq appropriately for each output */
     for (i = 0; i < BCM2836_NCORES; i++) {
         qemu_set_irq(s->irq[i], s->irqsrc[i] != 0);
         qemu_set_irq(s->fiq[i], s->fiqsrc[i] != 0);
     }
 }

 static void bcm2836_control_set_local_irq(void *opaque, int core, int local_irq,
                                           int level)
 {
     BCM2836ControlState *s = opaque;

     assert(core >= 0 && core < BCM2836_NCORES);
     assert(local_irq >= 0 && local_irq <= IRQ_CNTVIRQ);

     s->timerirqs[core] = deposit32(s->timerirqs[core], local_irq, 1, !!level);

     bcm2836_control_update(s);
 }

 /* XXX: the following wrapper functions are a kludgy workaround,
  * needed because I can't seem to pass useful information in the "irq"
  * parameter when using named interrupts. Feel free to clean this up!
  */

 static void bcm2836_control_set_local_irq0(void *opaque, int core, int level)
 {
     bcm2836_control_set_local_irq(opaque, core, 0, level);
 }

 static void bcm2836_control_set_local_irq1(void *opaque, int core, int level)
 {
     bcm2836_control_set_local_irq(opaque, core, 1, level);
 }

 static void bcm2836_control_set_local_irq2(void *opaque, int core, int level)
 {
     bcm2836_control_set_local_irq(opaque, core, 2, level);
 }

 static void bcm2836_control_set_local_irq3(void *opaque, int core, int level)
 {
     bcm2836_control_set_local_irq(opaque, core, 3, level);
 }

 static void bcm2836_control_set_gpu_irq(void *opaque, int irq, int level)
 {
     BCM2836ControlState *s = opaque;

     s->gpu_irq = level;

     bcm2836_control_update(s);
 }

 static void bcm2836_control_set_gpu_fiq(void *opaque, int irq, int level)
 {
     BCM2836ControlState *s = opaque;

     s->gpu_fiq = level;

     bcm2836_control_update(s);
 }

 static uint64_t bcm2836_control_read(void *opaque, hwaddr offset, unsigned size)
 {
     BCM2836ControlState *s = opaque;

     if (offset == REG_GPU_ROUTE) {
         assert(s->route_gpu_fiq < BCM2836_NCORES
                && s->route_gpu_irq < BCM2836_NCORES);
         return ((uint32_t)s->route_gpu_fiq << 2) | s->route_gpu_irq;
     } else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) {
         return s->timercontrol[(offset - REG_TIMERCONTROL) >> 2];
     } else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) {
         return s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2];
     } else if (offset >= REG_IRQSRC && offset < REG_FIQSRC) {
         return s->irqsrc[(offset - REG_IRQSRC) >> 2];
     } else if (offset >= REG_FIQSRC && offset < REG_MBOX0_WR) {
         return s->fiqsrc[(offset - REG_FIQSRC) >> 2];
     } else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) {
         return s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2];
     } else {
         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
                       __func__, offset);
         return 0;
     }
 }

 static void bcm2836_control_write(void *opaque, hwaddr offset,
                                   uint64_t val, unsigned size)
 {
     BCM2836ControlState *s = opaque;

     if (offset == REG_GPU_ROUTE) {
         s->route_gpu_irq = val & 0x3;
         s->route_gpu_fiq = (val >> 2) & 0x3;
     } else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) {
         s->timercontrol[(offset - REG_TIMERCONTROL) >> 2] = val & 0xff;
     } else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) {
         s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2] = val & 0xff;
     } else if (offset >= REG_MBOX0_WR && offset < REG_MBOX0_RDCLR) {
         s->mailboxes[(offset - REG_MBOX0_WR) >> 2] |= val;
     } else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) {
         s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2] &= ~val;
     } else {
         qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
                       __func__, offset);
         return;
     }

     bcm2836_control_update(s);
 }

 static const MemoryRegionOps bcm2836_control_ops = {
     .read = bcm2836_control_read,
     .write = bcm2836_control_write,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid.min_access_size = 4,
     .valid.max_access_size = 4,
 };

 static void bcm2836_control_reset(DeviceState *d)
 {
     BCM2836ControlState *s = BCM2836_CONTROL(d);
     int i;

     s->route_gpu_irq = s->route_gpu_fiq = 0;

     for (i = 0; i < BCM2836_NCORES; i++) {
         s->timercontrol[i] = 0;
         s->mailboxcontrol[i] = 0;
     }

     for (i = 0; i < BCM2836_NCORES * BCM2836_MBPERCORE; i++) {
         s->mailboxes[i] = 0;
     }
 }

 static void bcm2836_control_init(Object *obj)
 {
     BCM2836ControlState *s = BCM2836_CONTROL(obj);
     DeviceState *dev = DEVICE(obj);

     memory_region_init_io(&s->iomem, obj, &bcm2836_control_ops, s,
                           TYPE_BCM2836_CONTROL, REG_LIMIT);
     sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);

     /* inputs from each CPU core */
     qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq0, "cntpsirq",
                             BCM2836_NCORES);
     qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq1, "cntpnsirq",
                             BCM2836_NCORES);
     qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq2, "cnthpirq",
                             BCM2836_NCORES);
     qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq3, "cntvirq",
                             BCM2836_NCORES);

     /* IRQ and FIQ inputs from upstream bcm2835 controller */
     qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_irq, "gpu-irq", 1);
     qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_fiq, "gpu-fiq", 1);

     /* outputs to CPU cores */
     qdev_init_gpio_out_named(dev, s->irq, "irq", BCM2836_NCORES);
     qdev_init_gpio_out_named(dev, s->fiq, "fiq", BCM2836_NCORES);
 }

 static const VMStateDescription vmstate_bcm2836_control = {
     .name = TYPE_BCM2836_CONTROL,
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
         VMSTATE_UINT32_ARRAY(mailboxes, BCM2836ControlState,
                              BCM2836_NCORES * BCM2836_MBPERCORE),
         VMSTATE_UINT8(route_gpu_irq, BCM2836ControlState),
         VMSTATE_UINT8(route_gpu_fiq, BCM2836ControlState),
         VMSTATE_UINT32_ARRAY(timercontrol, BCM2836ControlState, BCM2836_NCORES),
         VMSTATE_UINT32_ARRAY(mailboxcontrol, BCM2836ControlState,
                              BCM2836_NCORES),
         VMSTATE_END_OF_LIST()
     }
 };

 static void bcm2836_control_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->reset = bcm2836_control_reset;
     dc->vmsd = &vmstate_bcm2836_control;
 }

 static TypeInfo bcm2836_control_info = {
     .name          = TYPE_BCM2836_CONTROL,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(BCM2836ControlState),
     .class_init    = bcm2836_control_class_init,
     .instance_init = bcm2836_control_init,
 };

 static void bcm2836_control_register_types(void)
 {
     type_register_static(&bcm2836_control_info);
 }

 type_init(bcm2836_control_register_types)
	/*
	* Rasperry Pi 2 emulation ARM control logic module.
	* Copyright (c) 2015, Microsoft
	* Written by Andrew Baumann
	*
	* Based on bcm2835_ic.c (Raspberry Pi emulation) (c) 2012 Gregory Estrade
	* This code is licensed under the GNU GPLv2 and later.
	*
	* At present, only implements interrupt routing, and mailboxes (i.e.,
	* not local timer, PMU interrupt, or AXI counters).
	*
	* Ref:
	* https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2836/QA7_rev3.4.pdf
	*/

	#include "qemu/osdep.h"
	#include "hw/intc/bcm2836_control.h"
	#include "qemu/log.h"

	#define REG_GPU_ROUTE 0x0c
	#define REG_TIMERCONTROL 0x40
	#define REG_MBOXCONTROL 0x50
	#define REG_IRQSRC 0x60
	#define REG_FIQSRC 0x70
	#define REG_MBOX0_WR 0x80
	#define REG_MBOX0_RDCLR 0xc0
	#define REG_LIMIT 0x100

	#define IRQ_BIT(cntrl, num) (((cntrl) & (1 << (num))) != 0)
	#define FIQ_BIT(cntrl, num) (((cntrl) & (1 << ((num) + 4))) != 0)

	#define IRQ_CNTPSIRQ 0
	#define IRQ_CNTPNSIRQ 1
	#define IRQ_CNTHPIRQ 2
	#define IRQ_CNTVIRQ 3
	#define IRQ_MAILBOX0 4
	#define IRQ_MAILBOX1 5
	#define IRQ_MAILBOX2 6
	#define IRQ_MAILBOX3 7
	#define IRQ_GPU 8
	#define IRQ_PMU 9
	#define IRQ_AXI 10
	#define IRQ_TIMER 11
	#define IRQ_MAX IRQ_TIMER

	static void deliver_local(BCM2836ControlState *s, uint8_t core, uint8_t irq,
	uint32_t controlreg, uint8_t controlidx)
	{
	if (FIQ_BIT(controlreg, controlidx)) {
	/* deliver a FIQ */
	s->fiqsrc[core] \|= (uint32_t)1 << irq;
	} else if (IRQ_BIT(controlreg, controlidx)) {
	/* deliver an IRQ */
	s->irqsrc[core] \|= (uint32_t)1 << irq;
	} else {
	/* the interrupt is masked */
	}
	}

	/* Update interrupts. */
	static void bcm2836_control_update(BCM2836ControlState *s)
	{
	int i, j;

	/* reset pending IRQs/FIQs */
	for (i = 0; i < BCM2836_NCORES; i++) {
	s->irqsrc[i] = s->fiqsrc[i] = 0;
	}

	/* apply routing logic, update status regs */
	if (s->gpu_irq) {
	assert(s->route_gpu_irq < BCM2836_NCORES);
	s->irqsrc[s->route_gpu_irq] \|= (uint32_t)1 << IRQ_GPU;
	}

	if (s->gpu_fiq) {
	assert(s->route_gpu_fiq < BCM2836_NCORES);
	s->fiqsrc[s->route_gpu_fiq] \|= (uint32_t)1 << IRQ_GPU;
	}

	for (i = 0; i < BCM2836_NCORES; i++) {
	/* handle local timer interrupts for this core */
	if (s->timerirqs[i]) {
	assert(s->timerirqs[i] < (1 << (IRQ_CNTVIRQ + 1))); /* sane mask? */
	for (j = 0; j <= IRQ_CNTVIRQ; j++) {
	if ((s->timerirqs[i] & (1 << j)) != 0) {
	/* local interrupt j is set */
	deliver_local(s, i, j, s->timercontrol[i], j);
	}
	}
	}

	/* handle mailboxes for this core */
	for (j = 0; j < BCM2836_MBPERCORE; j++) {
	if (s->mailboxes[i * BCM2836_MBPERCORE + j] != 0) {
	/* mailbox j is set */
	deliver_local(s, i, j + IRQ_MAILBOX0, s->mailboxcontrol[i], j);
	}
	}
	}

	/* call set_irq appropriately for each output */
	for (i = 0; i < BCM2836_NCORES; i++) {
	qemu_set_irq(s->irq[i], s->irqsrc[i] != 0);
	qemu_set_irq(s->fiq[i], s->fiqsrc[i] != 0);
	}
	}

	static void bcm2836_control_set_local_irq(void *opaque, int core, int local_irq,
	int level)
	{
	BCM2836ControlState *s = opaque;

	assert(core >= 0 && core < BCM2836_NCORES);
	assert(local_irq >= 0 && local_irq <= IRQ_CNTVIRQ);

	s->timerirqs[core] = deposit32(s->timerirqs[core], local_irq, 1, !!level);

	bcm2836_control_update(s);
	}

	/* XXX: the following wrapper functions are a kludgy workaround,
	* needed because I can't seem to pass useful information in the "irq"
	* parameter when using named interrupts. Feel free to clean this up!
	*/

	static void bcm2836_control_set_local_irq0(void *opaque, int core, int level)
	{
	bcm2836_control_set_local_irq(opaque, core, 0, level);
	}

	static void bcm2836_control_set_local_irq1(void *opaque, int core, int level)
	{
	bcm2836_control_set_local_irq(opaque, core, 1, level);
	}

	static void bcm2836_control_set_local_irq2(void *opaque, int core, int level)
	{
	bcm2836_control_set_local_irq(opaque, core, 2, level);
	}

	static void bcm2836_control_set_local_irq3(void *opaque, int core, int level)
	{
	bcm2836_control_set_local_irq(opaque, core, 3, level);
	}

	static void bcm2836_control_set_gpu_irq(void *opaque, int irq, int level)
	{
	BCM2836ControlState *s = opaque;

	s->gpu_irq = level;

	bcm2836_control_update(s);
	}

	static void bcm2836_control_set_gpu_fiq(void *opaque, int irq, int level)
	{
	BCM2836ControlState *s = opaque;

	s->gpu_fiq = level;

	bcm2836_control_update(s);
	}

	static uint64_t bcm2836_control_read(void *opaque, hwaddr offset, unsigned size)
	{
	BCM2836ControlState *s = opaque;

	if (offset == REG_GPU_ROUTE) {
	assert(s->route_gpu_fiq < BCM2836_NCORES
	&& s->route_gpu_irq < BCM2836_NCORES);
	return ((uint32_t)s->route_gpu_fiq << 2) \| s->route_gpu_irq;
	} else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) {
	return s->timercontrol[(offset - REG_TIMERCONTROL) >> 2];
	} else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) {
	return s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2];
	} else if (offset >= REG_IRQSRC && offset < REG_FIQSRC) {
	return s->irqsrc[(offset - REG_IRQSRC) >> 2];
	} else if (offset >= REG_FIQSRC && offset < REG_MBOX0_WR) {
	return s->fiqsrc[(offset - REG_FIQSRC) >> 2];
	} else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) {
	return s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2];
	} else {
	qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
	__func__, offset);
	return 0;
	}
	}

	static void bcm2836_control_write(void *opaque, hwaddr offset,
	uint64_t val, unsigned size)
	{
	BCM2836ControlState *s = opaque;

	if (offset == REG_GPU_ROUTE) {
	s->route_gpu_irq = val & 0x3;
	s->route_gpu_fiq = (val >> 2) & 0x3;
	} else if (offset >= REG_TIMERCONTROL && offset < REG_MBOXCONTROL) {
	s->timercontrol[(offset - REG_TIMERCONTROL) >> 2] = val & 0xff;
	} else if (offset >= REG_MBOXCONTROL && offset < REG_IRQSRC) {
	s->mailboxcontrol[(offset - REG_MBOXCONTROL) >> 2] = val & 0xff;
	} else if (offset >= REG_MBOX0_WR && offset < REG_MBOX0_RDCLR) {
	s->mailboxes[(offset - REG_MBOX0_WR) >> 2] \|= val;
	} else if (offset >= REG_MBOX0_RDCLR && offset < REG_LIMIT) {
	s->mailboxes[(offset - REG_MBOX0_RDCLR) >> 2] &= ~val;
	} else {
	qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset %"HWADDR_PRIx"\n",
	__func__, offset);
	return;
	}

	bcm2836_control_update(s);
	}

	static const MemoryRegionOps bcm2836_control_ops = {
	.read = bcm2836_control_read,
	.write = bcm2836_control_write,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid.min_access_size = 4,
	.valid.max_access_size = 4,
	};

	static void bcm2836_control_reset(DeviceState *d)
	{
	BCM2836ControlState *s = BCM2836_CONTROL(d);
	int i;

	s->route_gpu_irq = s->route_gpu_fiq = 0;

	for (i = 0; i < BCM2836_NCORES; i++) {
	s->timercontrol[i] = 0;
	s->mailboxcontrol[i] = 0;
	}

	for (i = 0; i < BCM2836_NCORES * BCM2836_MBPERCORE; i++) {
	s->mailboxes[i] = 0;
	}
	}

	static void bcm2836_control_init(Object *obj)
	{
	BCM2836ControlState *s = BCM2836_CONTROL(obj);
	DeviceState *dev = DEVICE(obj);

	memory_region_init_io(&s->iomem, obj, &bcm2836_control_ops, s,
	TYPE_BCM2836_CONTROL, REG_LIMIT);
	sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);

	/* inputs from each CPU core */
	qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq0, "cntpsirq",
	BCM2836_NCORES);
	qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq1, "cntpnsirq",
	BCM2836_NCORES);
	qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq2, "cnthpirq",
	BCM2836_NCORES);
	qdev_init_gpio_in_named(dev, bcm2836_control_set_local_irq3, "cntvirq",
	BCM2836_NCORES);

	/* IRQ and FIQ inputs from upstream bcm2835 controller */
	qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_irq, "gpu-irq", 1);
	qdev_init_gpio_in_named(dev, bcm2836_control_set_gpu_fiq, "gpu-fiq", 1);

	/* outputs to CPU cores */
	qdev_init_gpio_out_named(dev, s->irq, "irq", BCM2836_NCORES);
	qdev_init_gpio_out_named(dev, s->fiq, "fiq", BCM2836_NCORES);
	}

	static const VMStateDescription vmstate_bcm2836_control = {
	.name = TYPE_BCM2836_CONTROL,
	.version_id = 1,
	.minimum_version_id = 1,
	.fields = (VMStateField[]) {
	VMSTATE_UINT32_ARRAY(mailboxes, BCM2836ControlState,
	BCM2836_NCORES * BCM2836_MBPERCORE),
	VMSTATE_UINT8(route_gpu_irq, BCM2836ControlState),
	VMSTATE_UINT8(route_gpu_fiq, BCM2836ControlState),
	VMSTATE_UINT32_ARRAY(timercontrol, BCM2836ControlState, BCM2836_NCORES),
	VMSTATE_UINT32_ARRAY(mailboxcontrol, BCM2836ControlState,
	BCM2836_NCORES),
	VMSTATE_END_OF_LIST()
	}
	};

	static void bcm2836_control_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->reset = bcm2836_control_reset;
	dc->vmsd = &vmstate_bcm2836_control;
	}

	static TypeInfo bcm2836_control_info = {
	.name = TYPE_BCM2836_CONTROL,
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(BCM2836ControlState),
	.class_init = bcm2836_control_class_init,
	.instance_init = bcm2836_control_init,
	};

	static void bcm2836_control_register_types(void)
	{
	type_register_static(&bcm2836_control_info);
	}

	type_init(bcm2836_control_register_types)