hw/slavio_misc.c - qemu - Git at Google

 /*
  * QEMU Sparc SLAVIO aux io port emulation
  *
  * Copyright (c) 2005 Fabrice Bellard
  *
  * 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 "sysemu.h"
 #include "sysbus.h"
 #include "trace.h"

 /*
  * This is the auxio port, chip control and system control part of
  * chip STP2001 (Slave I/O), also produced as NCR89C105. See
  * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
  *
  * This also includes the PMC CPU idle controller.
  */

 typedef struct MiscState {
     SysBusDevice busdev;
     MemoryRegion cfg_iomem;
     MemoryRegion diag_iomem;
     MemoryRegion mdm_iomem;
     MemoryRegion led_iomem;
     MemoryRegion sysctrl_iomem;
     MemoryRegion aux1_iomem;
     MemoryRegion aux2_iomem;
     qemu_irq irq;
     qemu_irq fdc_tc;
     uint32_t dummy;
     uint8_t config;
     uint8_t aux1, aux2;
     uint8_t diag, mctrl;
     uint8_t sysctrl;
     uint16_t leds;
 } MiscState;

 typedef struct APCState {
     SysBusDevice busdev;
     MemoryRegion iomem;
     qemu_irq cpu_halt;
 } APCState;

 #define MISC_SIZE 1
 #define SYSCTRL_SIZE 4

 #define AUX1_TC        0x02

 #define AUX2_PWROFF    0x01
 #define AUX2_PWRINTCLR 0x02
 #define AUX2_PWRFAIL   0x20

 #define CFG_PWRINTEN   0x08

 #define SYS_RESET      0x01
 #define SYS_RESETSTAT  0x02

 static void slavio_misc_update_irq(void *opaque)
 {
     MiscState *s = opaque;

     if ((s->aux2 & AUX2_PWRFAIL) && (s->config & CFG_PWRINTEN)) {
         trace_slavio_misc_update_irq_raise();
         qemu_irq_raise(s->irq);
     } else {
         trace_slavio_misc_update_irq_lower();
         qemu_irq_lower(s->irq);
     }
 }

 static void slavio_misc_reset(DeviceState *d)
 {
     MiscState *s = container_of(d, MiscState, busdev.qdev);

     // Diagnostic and system control registers not cleared in reset
     s->config = s->aux1 = s->aux2 = s->mctrl = 0;
 }

 static void slavio_set_power_fail(void *opaque, int irq, int power_failing)
 {
     MiscState *s = opaque;

     trace_slavio_set_power_fail(power_failing, s->config);
     if (power_failing && (s->config & CFG_PWRINTEN)) {
         s->aux2 |= AUX2_PWRFAIL;
     } else {
         s->aux2 &= ~AUX2_PWRFAIL;
     }
     slavio_misc_update_irq(s);
 }

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

     trace_slavio_cfg_mem_writeb(val & 0xff);
     s->config = val & 0xff;
     slavio_misc_update_irq(s);
 }

 static uint64_t slavio_cfg_mem_readb(void *opaque, hwaddr addr,
                                      unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     ret = s->config;
     trace_slavio_cfg_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps slavio_cfg_mem_ops = {
     .read = slavio_cfg_mem_readb,
     .write = slavio_cfg_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

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

     trace_slavio_diag_mem_writeb(val & 0xff);
     s->diag = val & 0xff;
 }

 static uint64_t slavio_diag_mem_readb(void *opaque, hwaddr addr,
                                       unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     ret = s->diag;
     trace_slavio_diag_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps slavio_diag_mem_ops = {
     .read = slavio_diag_mem_readb,
     .write = slavio_diag_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

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

     trace_slavio_mdm_mem_writeb(val & 0xff);
     s->mctrl = val & 0xff;
 }

 static uint64_t slavio_mdm_mem_readb(void *opaque, hwaddr addr,
                                      unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     ret = s->mctrl;
     trace_slavio_mdm_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps slavio_mdm_mem_ops = {
     .read = slavio_mdm_mem_readb,
     .write = slavio_mdm_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void slavio_aux1_mem_writeb(void *opaque, hwaddr addr,
                                    uint64_t val, unsigned size)
 {
     MiscState *s = opaque;

     trace_slavio_aux1_mem_writeb(val & 0xff);
     if (val & AUX1_TC) {
         // Send a pulse to floppy terminal count line
         if (s->fdc_tc) {
             qemu_irq_raise(s->fdc_tc);
             qemu_irq_lower(s->fdc_tc);
         }
         val &= ~AUX1_TC;
     }
     s->aux1 = val & 0xff;
 }

 static uint64_t slavio_aux1_mem_readb(void *opaque, hwaddr addr,
                                       unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     ret = s->aux1;
     trace_slavio_aux1_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps slavio_aux1_mem_ops = {
     .read = slavio_aux1_mem_readb,
     .write = slavio_aux1_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void slavio_aux2_mem_writeb(void *opaque, hwaddr addr,
                                    uint64_t val, unsigned size)
 {
     MiscState *s = opaque;

     val &= AUX2_PWRINTCLR | AUX2_PWROFF;
     trace_slavio_aux2_mem_writeb(val & 0xff);
     val |= s->aux2 & AUX2_PWRFAIL;
     if (val & AUX2_PWRINTCLR) // Clear Power Fail int
         val &= AUX2_PWROFF;
     s->aux2 = val;
     if (val & AUX2_PWROFF)
         qemu_system_shutdown_request();
     slavio_misc_update_irq(s);
 }

 static uint64_t slavio_aux2_mem_readb(void *opaque, hwaddr addr,
                                       unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     ret = s->aux2;
     trace_slavio_aux2_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps slavio_aux2_mem_ops = {
     .read = slavio_aux2_mem_readb,
     .write = slavio_aux2_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

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

     trace_apc_mem_writeb(val & 0xff);
     qemu_irq_raise(s->cpu_halt);
 }

 static uint64_t apc_mem_readb(void *opaque, hwaddr addr,
                               unsigned size)
 {
     uint32_t ret = 0;

     trace_apc_mem_readb(ret);
     return ret;
 }

 static const MemoryRegionOps apc_mem_ops = {
     .read = apc_mem_readb,
     .write = apc_mem_writeb,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     }
 };

 static uint64_t slavio_sysctrl_mem_readl(void *opaque, hwaddr addr,
                                          unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     switch (addr) {
     case 0:
         ret = s->sysctrl;
         break;
     default:
         break;
     }
     trace_slavio_sysctrl_mem_readl(ret);
     return ret;
 }

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

     trace_slavio_sysctrl_mem_writel(val);
     switch (addr) {
     case 0:
         if (val & SYS_RESET) {
             s->sysctrl = SYS_RESETSTAT;
             qemu_system_reset_request();
         }
         break;
     default:
         break;
     }
 }

 static const MemoryRegionOps slavio_sysctrl_mem_ops = {
     .read = slavio_sysctrl_mem_readl,
     .write = slavio_sysctrl_mem_writel,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 4,
         .max_access_size = 4,
     },
 };

 static uint64_t slavio_led_mem_readw(void *opaque, hwaddr addr,
                                      unsigned size)
 {
     MiscState *s = opaque;
     uint32_t ret = 0;

     switch (addr) {
     case 0:
         ret = s->leds;
         break;
     default:
         break;
     }
     trace_slavio_led_mem_readw(ret);
     return ret;
 }

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

     trace_slavio_led_mem_readw(val & 0xffff);
     switch (addr) {
     case 0:
         s->leds = val;
         break;
     default:
         break;
     }
 }

 static const MemoryRegionOps slavio_led_mem_ops = {
     .read = slavio_led_mem_readw,
     .write = slavio_led_mem_writew,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 2,
         .max_access_size = 2,
     },
 };

 static const VMStateDescription vmstate_misc = {
     .name ="slavio_misc",
     .version_id = 1,
     .minimum_version_id = 1,
     .minimum_version_id_old = 1,
     .fields      = (VMStateField []) {
         VMSTATE_UINT32(dummy, MiscState),
         VMSTATE_UINT8(config, MiscState),
         VMSTATE_UINT8(aux1, MiscState),
         VMSTATE_UINT8(aux2, MiscState),
         VMSTATE_UINT8(diag, MiscState),
         VMSTATE_UINT8(mctrl, MiscState),
         VMSTATE_UINT8(sysctrl, MiscState),
         VMSTATE_END_OF_LIST()
     }
 };

 static int apc_init1(SysBusDevice *dev)
 {
     APCState *s = FROM_SYSBUS(APCState, dev);

     sysbus_init_irq(dev, &s->cpu_halt);

     /* Power management (APC) XXX: not a Slavio device */
     memory_region_init_io(&s->iomem, &apc_mem_ops, s,
                           "apc", MISC_SIZE);
     sysbus_init_mmio(dev, &s->iomem);
     return 0;
 }

 static int slavio_misc_init1(SysBusDevice *dev)
 {
     MiscState *s = FROM_SYSBUS(MiscState, dev);

     sysbus_init_irq(dev, &s->irq);
     sysbus_init_irq(dev, &s->fdc_tc);

     /* 8 bit registers */
     /* Slavio control */
     memory_region_init_io(&s->cfg_iomem, &slavio_cfg_mem_ops, s,
                           "configuration", MISC_SIZE);
     sysbus_init_mmio(dev, &s->cfg_iomem);

     /* Diagnostics */
     memory_region_init_io(&s->diag_iomem, &slavio_diag_mem_ops, s,
                           "diagnostic", MISC_SIZE);
     sysbus_init_mmio(dev, &s->diag_iomem);

     /* Modem control */
     memory_region_init_io(&s->mdm_iomem, &slavio_mdm_mem_ops, s,
                           "modem", MISC_SIZE);
     sysbus_init_mmio(dev, &s->mdm_iomem);

     /* 16 bit registers */
     /* ss600mp diag LEDs */
     memory_region_init_io(&s->led_iomem, &slavio_led_mem_ops, s,
                           "leds", MISC_SIZE);
     sysbus_init_mmio(dev, &s->led_iomem);

     /* 32 bit registers */
     /* System control */
     memory_region_init_io(&s->sysctrl_iomem, &slavio_sysctrl_mem_ops, s,
                           "system-control", MISC_SIZE);
     sysbus_init_mmio(dev, &s->sysctrl_iomem);

     /* AUX 1 (Misc System Functions) */
     memory_region_init_io(&s->aux1_iomem, &slavio_aux1_mem_ops, s,
                           "misc-system-functions", MISC_SIZE);
     sysbus_init_mmio(dev, &s->aux1_iomem);

     /* AUX 2 (Software Powerdown Control) */
     memory_region_init_io(&s->aux2_iomem, &slavio_aux2_mem_ops, s,
                           "software-powerdown-control", MISC_SIZE);
     sysbus_init_mmio(dev, &s->aux2_iomem);

     qdev_init_gpio_in(&dev->qdev, slavio_set_power_fail, 1);

     return 0;
 }

 static void slavio_misc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

     k->init = slavio_misc_init1;
     dc->reset = slavio_misc_reset;
     dc->vmsd = &vmstate_misc;
 }

 static TypeInfo slavio_misc_info = {
     .name          = "slavio_misc",
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(MiscState),
     .class_init    = slavio_misc_class_init,
 };

 static void apc_class_init(ObjectClass *klass, void *data)
 {
     SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

     k->init = apc_init1;
 }

 static TypeInfo apc_info = {
     .name          = "apc",
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(MiscState),
     .class_init    = apc_class_init,
 };

 static void slavio_misc_register_types(void)
 {
     type_register_static(&slavio_misc_info);
     type_register_static(&apc_info);
 }

 type_init(slavio_misc_register_types)
	/*
	* QEMU Sparc SLAVIO aux io port emulation
	*
	* Copyright (c) 2005 Fabrice Bellard
	*
	* 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 "sysemu.h"
	#include "sysbus.h"
	#include "trace.h"

	/*
	* This is the auxio port, chip control and system control part of
	* chip STP2001 (Slave I/O), also produced as NCR89C105. See
	* http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
	*
	* This also includes the PMC CPU idle controller.
	*/

	typedef struct MiscState {
	SysBusDevice busdev;
	MemoryRegion cfg_iomem;
	MemoryRegion diag_iomem;
	MemoryRegion mdm_iomem;
	MemoryRegion led_iomem;
	MemoryRegion sysctrl_iomem;
	MemoryRegion aux1_iomem;
	MemoryRegion aux2_iomem;
	qemu_irq irq;
	qemu_irq fdc_tc;
	uint32_t dummy;
	uint8_t config;
	uint8_t aux1, aux2;
	uint8_t diag, mctrl;
	uint8_t sysctrl;
	uint16_t leds;
	} MiscState;

	typedef struct APCState {
	SysBusDevice busdev;
	MemoryRegion iomem;
	qemu_irq cpu_halt;
	} APCState;

	#define MISC_SIZE 1
	#define SYSCTRL_SIZE 4

	#define AUX1_TC 0x02

	#define AUX2_PWROFF 0x01
	#define AUX2_PWRINTCLR 0x02
	#define AUX2_PWRFAIL 0x20

	#define CFG_PWRINTEN 0x08

	#define SYS_RESET 0x01
	#define SYS_RESETSTAT 0x02

	static void slavio_misc_update_irq(void *opaque)
	{
	MiscState *s = opaque;

	if ((s->aux2 & AUX2_PWRFAIL) && (s->config & CFG_PWRINTEN)) {
	trace_slavio_misc_update_irq_raise();
	qemu_irq_raise(s->irq);
	} else {
	trace_slavio_misc_update_irq_lower();
	qemu_irq_lower(s->irq);
	}
	}

	static void slavio_misc_reset(DeviceState *d)
	{
	MiscState *s = container_of(d, MiscState, busdev.qdev);

	// Diagnostic and system control registers not cleared in reset
	s->config = s->aux1 = s->aux2 = s->mctrl = 0;
	}

	static void slavio_set_power_fail(void *opaque, int irq, int power_failing)
	{
	MiscState *s = opaque;

	trace_slavio_set_power_fail(power_failing, s->config);
	if (power_failing && (s->config & CFG_PWRINTEN)) {
	s->aux2 \|= AUX2_PWRFAIL;
	} else {
	s->aux2 &= ~AUX2_PWRFAIL;
	}
	slavio_misc_update_irq(s);
	}

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

	trace_slavio_cfg_mem_writeb(val & 0xff);
	s->config = val & 0xff;
	slavio_misc_update_irq(s);
	}

	static uint64_t slavio_cfg_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	ret = s->config;
	trace_slavio_cfg_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps slavio_cfg_mem_ops = {
	.read = slavio_cfg_mem_readb,
	.write = slavio_cfg_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

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

	trace_slavio_diag_mem_writeb(val & 0xff);
	s->diag = val & 0xff;
	}

	static uint64_t slavio_diag_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	ret = s->diag;
	trace_slavio_diag_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps slavio_diag_mem_ops = {
	.read = slavio_diag_mem_readb,
	.write = slavio_diag_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

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

	trace_slavio_mdm_mem_writeb(val & 0xff);
	s->mctrl = val & 0xff;
	}

	static uint64_t slavio_mdm_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	ret = s->mctrl;
	trace_slavio_mdm_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps slavio_mdm_mem_ops = {
	.read = slavio_mdm_mem_readb,
	.write = slavio_mdm_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void slavio_aux1_mem_writeb(void *opaque, hwaddr addr,
	uint64_t val, unsigned size)
	{
	MiscState *s = opaque;

	trace_slavio_aux1_mem_writeb(val & 0xff);
	if (val & AUX1_TC) {
	// Send a pulse to floppy terminal count line
	if (s->fdc_tc) {
	qemu_irq_raise(s->fdc_tc);
	qemu_irq_lower(s->fdc_tc);
	}
	val &= ~AUX1_TC;
	}
	s->aux1 = val & 0xff;
	}

	static uint64_t slavio_aux1_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	ret = s->aux1;
	trace_slavio_aux1_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps slavio_aux1_mem_ops = {
	.read = slavio_aux1_mem_readb,
	.write = slavio_aux1_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void slavio_aux2_mem_writeb(void *opaque, hwaddr addr,
	uint64_t val, unsigned size)
	{
	MiscState *s = opaque;

	val &= AUX2_PWRINTCLR \| AUX2_PWROFF;
	trace_slavio_aux2_mem_writeb(val & 0xff);
	val \|= s->aux2 & AUX2_PWRFAIL;
	if (val & AUX2_PWRINTCLR) // Clear Power Fail int
	val &= AUX2_PWROFF;
	s->aux2 = val;
	if (val & AUX2_PWROFF)
	qemu_system_shutdown_request();
	slavio_misc_update_irq(s);
	}

	static uint64_t slavio_aux2_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	ret = s->aux2;
	trace_slavio_aux2_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps slavio_aux2_mem_ops = {
	.read = slavio_aux2_mem_readb,
	.write = slavio_aux2_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

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

	trace_apc_mem_writeb(val & 0xff);
	qemu_irq_raise(s->cpu_halt);
	}

	static uint64_t apc_mem_readb(void *opaque, hwaddr addr,
	unsigned size)
	{
	uint32_t ret = 0;

	trace_apc_mem_readb(ret);
	return ret;
	}

	static const MemoryRegionOps apc_mem_ops = {
	.read = apc_mem_readb,
	.write = apc_mem_writeb,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	}
	};

	static uint64_t slavio_sysctrl_mem_readl(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	switch (addr) {
	case 0:
	ret = s->sysctrl;
	break;
	default:
	break;
	}
	trace_slavio_sysctrl_mem_readl(ret);
	return ret;
	}

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

	trace_slavio_sysctrl_mem_writel(val);
	switch (addr) {
	case 0:
	if (val & SYS_RESET) {
	s->sysctrl = SYS_RESETSTAT;
	qemu_system_reset_request();
	}
	break;
	default:
	break;
	}
	}

	static const MemoryRegionOps slavio_sysctrl_mem_ops = {
	.read = slavio_sysctrl_mem_readl,
	.write = slavio_sysctrl_mem_writel,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 4,
	.max_access_size = 4,
	},
	};

	static uint64_t slavio_led_mem_readw(void *opaque, hwaddr addr,
	unsigned size)
	{
	MiscState *s = opaque;
	uint32_t ret = 0;

	switch (addr) {
	case 0:
	ret = s->leds;
	break;
	default:
	break;
	}
	trace_slavio_led_mem_readw(ret);
	return ret;
	}

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

	trace_slavio_led_mem_readw(val & 0xffff);
	switch (addr) {
	case 0:
	s->leds = val;
	break;
	default:
	break;
	}
	}

	static const MemoryRegionOps slavio_led_mem_ops = {
	.read = slavio_led_mem_readw,
	.write = slavio_led_mem_writew,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 2,
	.max_access_size = 2,
	},
	};

	static const VMStateDescription vmstate_misc = {
	.name ="slavio_misc",
	.version_id = 1,
	.minimum_version_id = 1,
	.minimum_version_id_old = 1,
	.fields = (VMStateField []) {
	VMSTATE_UINT32(dummy, MiscState),
	VMSTATE_UINT8(config, MiscState),
	VMSTATE_UINT8(aux1, MiscState),
	VMSTATE_UINT8(aux2, MiscState),
	VMSTATE_UINT8(diag, MiscState),
	VMSTATE_UINT8(mctrl, MiscState),
	VMSTATE_UINT8(sysctrl, MiscState),
	VMSTATE_END_OF_LIST()
	}
	};

	static int apc_init1(SysBusDevice *dev)
	{
	APCState *s = FROM_SYSBUS(APCState, dev);

	sysbus_init_irq(dev, &s->cpu_halt);

	/* Power management (APC) XXX: not a Slavio device */
	memory_region_init_io(&s->iomem, &apc_mem_ops, s,
	"apc", MISC_SIZE);
	sysbus_init_mmio(dev, &s->iomem);
	return 0;
	}

	static int slavio_misc_init1(SysBusDevice *dev)
	{
	MiscState *s = FROM_SYSBUS(MiscState, dev);

	sysbus_init_irq(dev, &s->irq);
	sysbus_init_irq(dev, &s->fdc_tc);

	/* 8 bit registers */
	/* Slavio control */
	memory_region_init_io(&s->cfg_iomem, &slavio_cfg_mem_ops, s,
	"configuration", MISC_SIZE);
	sysbus_init_mmio(dev, &s->cfg_iomem);

	/* Diagnostics */
	memory_region_init_io(&s->diag_iomem, &slavio_diag_mem_ops, s,
	"diagnostic", MISC_SIZE);
	sysbus_init_mmio(dev, &s->diag_iomem);

	/* Modem control */
	memory_region_init_io(&s->mdm_iomem, &slavio_mdm_mem_ops, s,
	"modem", MISC_SIZE);
	sysbus_init_mmio(dev, &s->mdm_iomem);

	/* 16 bit registers */
	/* ss600mp diag LEDs */
	memory_region_init_io(&s->led_iomem, &slavio_led_mem_ops, s,
	"leds", MISC_SIZE);
	sysbus_init_mmio(dev, &s->led_iomem);

	/* 32 bit registers */
	/* System control */
	memory_region_init_io(&s->sysctrl_iomem, &slavio_sysctrl_mem_ops, s,
	"system-control", MISC_SIZE);
	sysbus_init_mmio(dev, &s->sysctrl_iomem);

	/* AUX 1 (Misc System Functions) */
	memory_region_init_io(&s->aux1_iomem, &slavio_aux1_mem_ops, s,
	"misc-system-functions", MISC_SIZE);
	sysbus_init_mmio(dev, &s->aux1_iomem);

	/* AUX 2 (Software Powerdown Control) */
	memory_region_init_io(&s->aux2_iomem, &slavio_aux2_mem_ops, s,
	"software-powerdown-control", MISC_SIZE);
	sysbus_init_mmio(dev, &s->aux2_iomem);

	qdev_init_gpio_in(&dev->qdev, slavio_set_power_fail, 1);

	return 0;
	}

	static void slavio_misc_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);
	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

	k->init = slavio_misc_init1;
	dc->reset = slavio_misc_reset;
	dc->vmsd = &vmstate_misc;
	}

	static TypeInfo slavio_misc_info = {
	.name = "slavio_misc",
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(MiscState),
	.class_init = slavio_misc_class_init,
	};

	static void apc_class_init(ObjectClass klass, void data)
	{
	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

	k->init = apc_init1;
	}

	static TypeInfo apc_info = {
	.name = "apc",
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(MiscState),
	.class_init = apc_class_init,
	};

	static void slavio_misc_register_types(void)
	{
	type_register_static(&slavio_misc_info);
	type_register_static(&apc_info);
	}

	type_init(slavio_misc_register_types)