kvm/ppc/mpic: import hw/openpic.c from QEMU

This is QEMU's hw/openpic.c from commit
abd8d4a4d6dfea7ddea72f095f993e1de941614e ("Update version for
1.4.0-rc0"), run through Lindent with no other changes to ease merging
future changes between Linux and QEMU.  Remaining style issues
(including those introduced by Lindent) will be fixed in a later patch.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 1686 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/mpic.c b/arch/powerpc/kvm/mpic.c
new file mode 100644
index 000000000000..57655b988288
--- /dev/null
+++ b/arch/powerpc/kvm/mpic.c
@@ -0,0 +1,1686 @@
+/*
+ * OpenPIC emulation
+ *
+ * Copyright (c) 2004 Jocelyn Mayer
+ *               2011 Alexander Graf
+ *
+ * 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.
+ */
+/*
+ *
+ * Based on OpenPic implementations:
+ * - Intel GW80314 I/O companion chip developer's manual
+ * - Motorola MPC8245 & MPC8540 user manuals.
+ * - Motorola MCP750 (aka Raven) programmer manual.
+ * - Motorola Harrier programmer manuel
+ *
+ * Serial interrupts, as implemented in Raven chipset are not supported yet.
+ *
+ */
+#include "hw.h"
+#include "ppc/mac.h"
+#include "pci/pci.h"
+#include "openpic.h"
+#include "sysbus.h"
+#include "pci/msi.h"
+#include "qemu/bitops.h"
+#include "ppc.h"
+
+//#define DEBUG_OPENPIC
+
+#ifdef DEBUG_OPENPIC
+static const int debug_openpic = 1;
+#else
+static const int debug_openpic = 0;
+#endif
+
+#define DPRINTF(fmt, ...) do { \
+        if (debug_openpic) { \
+            printf(fmt , ## __VA_ARGS__); \
+        } \
+    } while (0)
+
+#define MAX_CPU     32
+#define MAX_SRC     256
+#define MAX_TMR     4
+#define MAX_IPI     4
+#define MAX_MSI     8
+#define MAX_IRQ     (MAX_SRC + MAX_IPI + MAX_TMR)
+#define VID         0x03	/* MPIC version ID */
+
+/* OpenPIC capability flags */
+#define OPENPIC_FLAG_IDR_CRIT     (1 << 0)
+#define OPENPIC_FLAG_ILR          (2 << 0)
+
+/* OpenPIC address map */
+#define OPENPIC_GLB_REG_START        0x0
+#define OPENPIC_GLB_REG_SIZE         0x10F0
+#define OPENPIC_TMR_REG_START        0x10F0
+#define OPENPIC_TMR_REG_SIZE         0x220
+#define OPENPIC_MSI_REG_START        0x1600
+#define OPENPIC_MSI_REG_SIZE         0x200
+#define OPENPIC_SUMMARY_REG_START   0x3800
+#define OPENPIC_SUMMARY_REG_SIZE    0x800
+#define OPENPIC_SRC_REG_START        0x10000
+#define OPENPIC_SRC_REG_SIZE         (MAX_SRC * 0x20)
+#define OPENPIC_CPU_REG_START        0x20000
+#define OPENPIC_CPU_REG_SIZE         0x100 + ((MAX_CPU - 1) * 0x1000)
+
+/* Raven */
+#define RAVEN_MAX_CPU      2
+#define RAVEN_MAX_EXT     48
+#define RAVEN_MAX_IRQ     64
+#define RAVEN_MAX_TMR      MAX_TMR
+#define RAVEN_MAX_IPI      MAX_IPI
+
+/* Interrupt definitions */
+#define RAVEN_FE_IRQ     (RAVEN_MAX_EXT)	/* Internal functional IRQ */
+#define RAVEN_ERR_IRQ    (RAVEN_MAX_EXT + 1)	/* Error IRQ */
+#define RAVEN_TMR_IRQ    (RAVEN_MAX_EXT + 2)	/* First timer IRQ */
+#define RAVEN_IPI_IRQ    (RAVEN_TMR_IRQ + RAVEN_MAX_TMR)	/* First IPI IRQ */
+/* First doorbell IRQ */
+#define RAVEN_DBL_IRQ    (RAVEN_IPI_IRQ + (RAVEN_MAX_CPU * RAVEN_MAX_IPI))
+
+typedef struct FslMpicInfo {
+	int max_ext;
+} FslMpicInfo;
+
+static FslMpicInfo fsl_mpic_20 = {
+	.max_ext = 12,
+};
+
+static FslMpicInfo fsl_mpic_42 = {
+	.max_ext = 12,
+};
+
+#define FRR_NIRQ_SHIFT    16
+#define FRR_NCPU_SHIFT     8
+#define FRR_VID_SHIFT      0
+
+#define VID_REVISION_1_2   2
+#define VID_REVISION_1_3   3
+
+#define VIR_GENERIC      0x00000000	/* Generic Vendor ID */
+
+#define GCR_RESET        0x80000000
+#define GCR_MODE_PASS    0x00000000
+#define GCR_MODE_MIXED   0x20000000
+#define GCR_MODE_PROXY   0x60000000
+
+#define TBCR_CI           0x80000000	/* count inhibit */
+#define TCCR_TOG          0x80000000	/* toggles when decrement to zero */
+
+#define IDR_EP_SHIFT      31
+#define IDR_EP_MASK       (1 << IDR_EP_SHIFT)
+#define IDR_CI0_SHIFT     30
+#define IDR_CI1_SHIFT     29
+#define IDR_P1_SHIFT      1
+#define IDR_P0_SHIFT      0
+
+#define ILR_INTTGT_MASK   0x000000ff
+#define ILR_INTTGT_INT    0x00
+#define ILR_INTTGT_CINT   0x01	/* critical */
+#define ILR_INTTGT_MCP    0x02	/* machine check */
+
+/* The currently supported INTTGT values happen to be the same as QEMU's
+ * openpic output codes, but don't depend on this.  The output codes
+ * could change (unlikely, but...) or support could be added for
+ * more INTTGT values.
+ */
+static const int inttgt_output[][2] = {
+	{ILR_INTTGT_INT, OPENPIC_OUTPUT_INT},
+	{ILR_INTTGT_CINT, OPENPIC_OUTPUT_CINT},
+	{ILR_INTTGT_MCP, OPENPIC_OUTPUT_MCK},
+};
+
+static int inttgt_to_output(int inttgt)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) {
+		if (inttgt_output[i][0] == inttgt) {
+			return inttgt_output[i][1];
+		}
+	}
+
+	fprintf(stderr, "%s: unsupported inttgt %d\n", __func__, inttgt);
+	return OPENPIC_OUTPUT_INT;
+}
+
+static int output_to_inttgt(int output)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(inttgt_output); i++) {
+		if (inttgt_output[i][1] == output) {
+			return inttgt_output[i][0];
+		}
+	}
+
+	abort();
+}
+
+#define MSIIR_OFFSET       0x140
+#define MSIIR_SRS_SHIFT    29
+#define MSIIR_SRS_MASK     (0x7 << MSIIR_SRS_SHIFT)
+#define MSIIR_IBS_SHIFT    24
+#define MSIIR_IBS_MASK     (0x1f << MSIIR_IBS_SHIFT)
+
+static int get_current_cpu(void)
+{
+	CPUState *cpu_single_cpu;
+
+	if (!cpu_single_env) {
+		return -1;
+	}
+
+	cpu_single_cpu = ENV_GET_CPU(cpu_single_env);
+	return cpu_single_cpu->cpu_index;
+}
+
+static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, int idx);
+static void openpic_cpu_write_internal(void *opaque, hwaddr addr,
+				       uint32_t val, int idx);
+
+typedef enum IRQType {
+	IRQ_TYPE_NORMAL = 0,
+	IRQ_TYPE_FSLINT,	/* FSL internal interrupt -- level only */
+	IRQ_TYPE_FSLSPECIAL,	/* FSL timer/IPI interrupt, edge, no polarity */
+} IRQType;
+
+typedef struct IRQQueue {
+	/* Round up to the nearest 64 IRQs so that the queue length
+	 * won't change when moving between 32 and 64 bit hosts.
+	 */
+	unsigned long queue[BITS_TO_LONGS((MAX_IRQ + 63) & ~63)];
+	int next;
+	int priority;
+} IRQQueue;
+
+typedef struct IRQSource {
+	uint32_t ivpr;		/* IRQ vector/priority register */
+	uint32_t idr;		/* IRQ destination register */
+	uint32_t destmask;	/* bitmap of CPU destinations */
+	int last_cpu;
+	int output;		/* IRQ level, e.g. OPENPIC_OUTPUT_INT */
+	int pending;		/* TRUE if IRQ is pending */
+	IRQType type;
+	bool level:1;		/* level-triggered */
+	bool nomask:1;		/* critical interrupts ignore mask on some FSL MPICs */
+} IRQSource;
+
+#define IVPR_MASK_SHIFT       31
+#define IVPR_MASK_MASK        (1 << IVPR_MASK_SHIFT)
+#define IVPR_ACTIVITY_SHIFT   30
+#define IVPR_ACTIVITY_MASK    (1 << IVPR_ACTIVITY_SHIFT)
+#define IVPR_MODE_SHIFT       29
+#define IVPR_MODE_MASK        (1 << IVPR_MODE_SHIFT)
+#define IVPR_POLARITY_SHIFT   23
+#define IVPR_POLARITY_MASK    (1 << IVPR_POLARITY_SHIFT)
+#define IVPR_SENSE_SHIFT      22
+#define IVPR_SENSE_MASK       (1 << IVPR_SENSE_SHIFT)
+
+#define IVPR_PRIORITY_MASK     (0xF << 16)
+#define IVPR_PRIORITY(_ivprr_) ((int)(((_ivprr_) & IVPR_PRIORITY_MASK) >> 16))
+#define IVPR_VECTOR(opp, _ivprr_) ((_ivprr_) & (opp)->vector_mask)
+
+/* IDR[EP/CI] are only for FSL MPIC prior to v4.0 */
+#define IDR_EP      0x80000000	/* external pin */
+#define IDR_CI      0x40000000	/* critical interrupt */
+
+typedef struct IRQDest {
+	int32_t ctpr;		/* CPU current task priority */
+	IRQQueue raised;
+	IRQQueue servicing;
+	qemu_irq *irqs;
+
+	/* Count of IRQ sources asserting on non-INT outputs */
+	uint32_t outputs_active[OPENPIC_OUTPUT_NB];
+} IRQDest;
+
+typedef struct OpenPICState {
+	SysBusDevice busdev;
+	MemoryRegion mem;
+
+	/* Behavior control */
+	FslMpicInfo *fsl;
+	uint32_t model;
+	uint32_t flags;
+	uint32_t nb_irqs;
+	uint32_t vid;
+	uint32_t vir;		/* Vendor identification register */
+	uint32_t vector_mask;
+	uint32_t tfrr_reset;
+	uint32_t ivpr_reset;
+	uint32_t idr_reset;
+	uint32_t brr1;
+	uint32_t mpic_mode_mask;
+
+	/* Sub-regions */
+	MemoryRegion sub_io_mem[6];
+
+	/* Global registers */
+	uint32_t frr;		/* Feature reporting register */
+	uint32_t gcr;		/* Global configuration register  */
+	uint32_t pir;		/* Processor initialization register */
+	uint32_t spve;		/* Spurious vector register */
+	uint32_t tfrr;		/* Timer frequency reporting register */
+	/* Source registers */
+	IRQSource src[MAX_IRQ];
+	/* Local registers per output pin */
+	IRQDest dst[MAX_CPU];
+	uint32_t nb_cpus;
+	/* Timer registers */
+	struct {
+		uint32_t tccr;	/* Global timer current count register */
+		uint32_t tbcr;	/* Global timer base count register */
+	} timers[MAX_TMR];
+	/* Shared MSI registers */
+	struct {
+		uint32_t msir;	/* Shared Message Signaled Interrupt Register */
+	} msi[MAX_MSI];
+	uint32_t max_irq;
+	uint32_t irq_ipi0;
+	uint32_t irq_tim0;
+	uint32_t irq_msi;
+} OpenPICState;
+
+static inline void IRQ_setbit(IRQQueue * q, int n_IRQ)
+{
+	set_bit(n_IRQ, q->queue);
+}
+
+static inline void IRQ_resetbit(IRQQueue * q, int n_IRQ)
+{
+	clear_bit(n_IRQ, q->queue);
+}
+
+static inline int IRQ_testbit(IRQQueue * q, int n_IRQ)
+{
+	return test_bit(n_IRQ, q->queue);
+}
+
+static void IRQ_check(OpenPICState * opp, IRQQueue * q)
+{
+	int irq = -1;
+	int next = -1;
+	int priority = -1;
+
+	for (;;) {
+		irq = find_next_bit(q->queue, opp->max_irq, irq + 1);
+		if (irq == opp->max_irq) {
+			break;
+		}
+
+		DPRINTF("IRQ_check: irq %d set ivpr_pr=%d pr=%d\n",
+			irq, IVPR_PRIORITY(opp->src[irq].ivpr), priority);
+
+		if (IVPR_PRIORITY(opp->src[irq].ivpr) > priority) {
+			next = irq;
+			priority = IVPR_PRIORITY(opp->src[irq].ivpr);
+		}
+	}
+
+	q->next = next;
+	q->priority = priority;
+}
+
+static int IRQ_get_next(OpenPICState * opp, IRQQueue * q)
+{
+	/* XXX: optimize */
+	IRQ_check(opp, q);
+
+	return q->next;
+}
+
+static void IRQ_local_pipe(OpenPICState * opp, int n_CPU, int n_IRQ,
+			   bool active, bool was_active)
+{
+	IRQDest *dst;
+	IRQSource *src;
+	int priority;
+
+	dst = &opp->dst[n_CPU];
+	src = &opp->src[n_IRQ];
+
+	DPRINTF("%s: IRQ %d active %d was %d\n",
+		__func__, n_IRQ, active, was_active);
+
+	if (src->output != OPENPIC_OUTPUT_INT) {
+		DPRINTF("%s: output %d irq %d active %d was %d count %d\n",
+			__func__, src->output, n_IRQ, active, was_active,
+			dst->outputs_active[src->output]);
+
+		/* On Freescale MPIC, critical interrupts ignore priority,
+		 * IACK, EOI, etc.  Before MPIC v4.1 they also ignore
+		 * masking.
+		 */
+		if (active) {
+			if (!was_active
+			    && dst->outputs_active[src->output]++ == 0) {
+				DPRINTF
+				    ("%s: Raise OpenPIC output %d cpu %d irq %d\n",
+				     __func__, src->output, n_CPU, n_IRQ);
+				qemu_irq_raise(dst->irqs[src->output]);
+			}
+		} else {
+			if (was_active
+			    && --dst->outputs_active[src->output] == 0) {
+				DPRINTF
+				    ("%s: Lower OpenPIC output %d cpu %d irq %d\n",
+				     __func__, src->output, n_CPU, n_IRQ);
+				qemu_irq_lower(dst->irqs[src->output]);
+			}
+		}
+
+		return;
+	}
+
+	priority = IVPR_PRIORITY(src->ivpr);
+
+	/* Even if the interrupt doesn't have enough priority,
+	 * it is still raised, in case ctpr is lowered later.
+	 */
+	if (active) {
+		IRQ_setbit(&dst->raised, n_IRQ);
+	} else {
+		IRQ_resetbit(&dst->raised, n_IRQ);
+	}
+
+	IRQ_check(opp, &dst->raised);
+
+	if (active && priority <= dst->ctpr) {
+		DPRINTF
+		    ("%s: IRQ %d priority %d too low for ctpr %d on CPU %d\n",
+		     __func__, n_IRQ, priority, dst->ctpr, n_CPU);
+		active = 0;
+	}
+
+	if (active) {
+		if (IRQ_get_next(opp, &dst->servicing) >= 0 &&
+		    priority <= dst->servicing.priority) {
+			DPRINTF
+			    ("%s: IRQ %d is hidden by servicing IRQ %d on CPU %d\n",
+			     __func__, n_IRQ, dst->servicing.next, n_CPU);
+		} else {
+			DPRINTF
+			    ("%s: Raise OpenPIC INT output cpu %d irq %d/%d\n",
+			     __func__, n_CPU, n_IRQ, dst->raised.next);
+			qemu_irq_raise(opp->dst[n_CPU].
+				       irqs[OPENPIC_OUTPUT_INT]);
+		}
+	} else {
+		IRQ_get_next(opp, &dst->servicing);
+		if (dst->raised.priority > dst->ctpr &&
+		    dst->raised.priority > dst->servicing.priority) {
+			DPRINTF
+			    ("%s: IRQ %d inactive, IRQ %d prio %d above %d/%d, CPU %d\n",
+			     __func__, n_IRQ, dst->raised.next,
+			     dst->raised.priority, dst->ctpr,
+			     dst->servicing.priority, n_CPU);
+			/* IRQ line stays asserted */
+		} else {
+			DPRINTF
+			    ("%s: IRQ %d inactive, current prio %d/%d, CPU %d\n",
+			     __func__, n_IRQ, dst->ctpr,
+			     dst->servicing.priority, n_CPU);
+			qemu_irq_lower(opp->dst[n_CPU].
+				       irqs[OPENPIC_OUTPUT_INT]);
+		}
+	}
+}
+
+/* update pic state because registers for n_IRQ have changed value */
+static void openpic_update_irq(OpenPICState * opp, int n_IRQ)
+{
+	IRQSource *src;
+	bool active, was_active;
+	int i;
+
+	src = &opp->src[n_IRQ];
+	active = src->pending;
+
+	if ((src->ivpr & IVPR_MASK_MASK) && !src->nomask) {
+		/* Interrupt source is disabled */
+		DPRINTF("%s: IRQ %d is disabled\n", __func__, n_IRQ);
+		active = false;
+	}
+
+	was_active = ! !(src->ivpr & IVPR_ACTIVITY_MASK);
+
+	/*
+	 * We don't have a similar check for already-active because
+	 * ctpr may have changed and we need to withdraw the interrupt.
+	 */
+	if (!active && !was_active) {
+		DPRINTF("%s: IRQ %d is already inactive\n", __func__, n_IRQ);
+		return;
+	}
+
+	if (active) {
+		src->ivpr |= IVPR_ACTIVITY_MASK;
+	} else {
+		src->ivpr &= ~IVPR_ACTIVITY_MASK;
+	}
+
+	if (src->destmask == 0) {
+		/* No target */
+		DPRINTF("%s: IRQ %d has no target\n", __func__, n_IRQ);
+		return;
+	}
+
+	if (src->destmask == (1 << src->last_cpu)) {
+		/* Only one CPU is allowed to receive this IRQ */
+		IRQ_local_pipe(opp, src->last_cpu, n_IRQ, active, was_active);
+	} else if (!(src->ivpr & IVPR_MODE_MASK)) {
+		/* Directed delivery mode */
+		for (i = 0; i < opp->nb_cpus; i++) {
+			if (src->destmask & (1 << i)) {
+				IRQ_local_pipe(opp, i, n_IRQ, active,
+					       was_active);
+			}
+		}
+	} else {
+		/* Distributed delivery mode */
+		for (i = src->last_cpu + 1; i != src->last_cpu; i++) {
+			if (i == opp->nb_cpus) {
+				i = 0;
+			}
+			if (src->destmask & (1 << i)) {
+				IRQ_local_pipe(opp, i, n_IRQ, active,
+					       was_active);
+				src->last_cpu = i;
+				break;
+			}
+		}
+	}
+}
+
+static void openpic_set_irq(void *opaque, int n_IRQ, int level)
+{
+	OpenPICState *opp = opaque;
+	IRQSource *src;
+
+	if (n_IRQ >= MAX_IRQ) {
+		fprintf(stderr, "%s: IRQ %d out of range\n", __func__, n_IRQ);
+		abort();
+	}
+
+	src = &opp->src[n_IRQ];
+	DPRINTF("openpic: set irq %d = %d ivpr=0x%08x\n",
+		n_IRQ, level, src->ivpr);
+	if (src->level) {
+		/* level-sensitive irq */
+		src->pending = level;
+		openpic_update_irq(opp, n_IRQ);
+	} else {
+		/* edge-sensitive irq */
+		if (level) {
+			src->pending = 1;
+			openpic_update_irq(opp, n_IRQ);
+		}
+
+		if (src->output != OPENPIC_OUTPUT_INT) {
+			/* Edge-triggered interrupts shouldn't be used
+			 * with non-INT delivery, but just in case,
+			 * try to make it do something sane rather than
+			 * cause an interrupt storm.  This is close to
+			 * what you'd probably see happen in real hardware.
+			 */
+			src->pending = 0;
+			openpic_update_irq(opp, n_IRQ);
+		}
+	}
+}
+
+static void openpic_reset(DeviceState * d)
+{
+	OpenPICState *opp = FROM_SYSBUS(typeof(*opp), SYS_BUS_DEVICE(d));
+	int i;
+
+	opp->gcr = GCR_RESET;
+	/* Initialise controller registers */
+	opp->frr = ((opp->nb_irqs - 1) << FRR_NIRQ_SHIFT) |
+	    ((opp->nb_cpus - 1) << FRR_NCPU_SHIFT) |
+	    (opp->vid << FRR_VID_SHIFT);
+
+	opp->pir = 0;
+	opp->spve = -1 & opp->vector_mask;
+	opp->tfrr = opp->tfrr_reset;
+	/* Initialise IRQ sources */
+	for (i = 0; i < opp->max_irq; i++) {
+		opp->src[i].ivpr = opp->ivpr_reset;
+		opp->src[i].idr = opp->idr_reset;
+
+		switch (opp->src[i].type) {
+		case IRQ_TYPE_NORMAL:
+			opp->src[i].level =
+			    ! !(opp->ivpr_reset & IVPR_SENSE_MASK);
+			break;
+
+		case IRQ_TYPE_FSLINT:
+			opp->src[i].ivpr |= IVPR_POLARITY_MASK;
+			break;
+
+		case IRQ_TYPE_FSLSPECIAL:
+			break;
+		}
+	}
+	/* Initialise IRQ destinations */
+	for (i = 0; i < MAX_CPU; i++) {
+		opp->dst[i].ctpr = 15;
+		memset(&opp->dst[i].raised, 0, sizeof(IRQQueue));
+		opp->dst[i].raised.next = -1;
+		memset(&opp->dst[i].servicing, 0, sizeof(IRQQueue));
+		opp->dst[i].servicing.next = -1;
+	}
+	/* Initialise timers */
+	for (i = 0; i < MAX_TMR; i++) {
+		opp->timers[i].tccr = 0;
+		opp->timers[i].tbcr = TBCR_CI;
+	}
+	/* Go out of RESET state */
+	opp->gcr = 0;
+}
+
+static inline uint32_t read_IRQreg_idr(OpenPICState * opp, int n_IRQ)
+{
+	return opp->src[n_IRQ].idr;
+}
+
+static inline uint32_t read_IRQreg_ilr(OpenPICState * opp, int n_IRQ)
+{
+	if (opp->flags & OPENPIC_FLAG_ILR) {
+		return output_to_inttgt(opp->src[n_IRQ].output);
+	}
+
+	return 0xffffffff;
+}
+
+static inline uint32_t read_IRQreg_ivpr(OpenPICState * opp, int n_IRQ)
+{
+	return opp->src[n_IRQ].ivpr;
+}
+
+static inline void write_IRQreg_idr(OpenPICState * opp, int n_IRQ, uint32_t val)
+{
+	IRQSource *src = &opp->src[n_IRQ];
+	uint32_t normal_mask = (1UL << opp->nb_cpus) - 1;
+	uint32_t crit_mask = 0;
+	uint32_t mask = normal_mask;
+	int crit_shift = IDR_EP_SHIFT - opp->nb_cpus;
+	int i;
+
+	if (opp->flags & OPENPIC_FLAG_IDR_CRIT) {
+		crit_mask = mask << crit_shift;
+		mask |= crit_mask | IDR_EP;
+	}
+
+	src->idr = val & mask;
+	DPRINTF("Set IDR %d to 0x%08x\n", n_IRQ, src->idr);
+
+	if (opp->flags & OPENPIC_FLAG_IDR_CRIT) {
+		if (src->idr & crit_mask) {
+			if (src->idr & normal_mask) {
+				DPRINTF
+				    ("%s: IRQ configured for multiple output types, using "
+				     "critical\n", __func__);
+			}
+
+			src->output = OPENPIC_OUTPUT_CINT;
+			src->nomask = true;
+			src->destmask = 0;
+
+			for (i = 0; i < opp->nb_cpus; i++) {
+				int n_ci = IDR_CI0_SHIFT - i;
+
+				if (src->idr & (1UL << n_ci)) {
+					src->destmask |= 1UL << i;
+				}
+			}
+		} else {
+			src->output = OPENPIC_OUTPUT_INT;
+			src->nomask = false;
+			src->destmask = src->idr & normal_mask;
+		}
+	} else {
+		src->destmask = src->idr;
+	}
+}
+
+static inline void write_IRQreg_ilr(OpenPICState * opp, int n_IRQ, uint32_t val)
+{
+	if (opp->flags & OPENPIC_FLAG_ILR) {
+		IRQSource *src = &opp->src[n_IRQ];
+
+		src->output = inttgt_to_output(val & ILR_INTTGT_MASK);
+		DPRINTF("Set ILR %d to 0x%08x, output %d\n", n_IRQ, src->idr,
+			src->output);
+
+		/* TODO: on MPIC v4.0 only, set nomask for non-INT */
+	}
+}
+
+static inline void write_IRQreg_ivpr(OpenPICState * opp, int n_IRQ,
+				     uint32_t val)
+{
+	uint32_t mask;
+
+	/* NOTE when implementing newer FSL MPIC models: starting with v4.0,
+	 * the polarity bit is read-only on internal interrupts.
+	 */
+	mask = IVPR_MASK_MASK | IVPR_PRIORITY_MASK | IVPR_SENSE_MASK |
+	    IVPR_POLARITY_MASK | opp->vector_mask;
+
+	/* ACTIVITY bit is read-only */
+	opp->src[n_IRQ].ivpr =
+	    (opp->src[n_IRQ].ivpr & IVPR_ACTIVITY_MASK) | (val & mask);
+
+	/* For FSL internal interrupts, The sense bit is reserved and zero,
+	 * and the interrupt is always level-triggered.  Timers and IPIs
+	 * have no sense or polarity bits, and are edge-triggered.
+	 */
+	switch (opp->src[n_IRQ].type) {
+	case IRQ_TYPE_NORMAL:
+		opp->src[n_IRQ].level =
+		    ! !(opp->src[n_IRQ].ivpr & IVPR_SENSE_MASK);
+		break;
+
+	case IRQ_TYPE_FSLINT:
+		opp->src[n_IRQ].ivpr &= ~IVPR_SENSE_MASK;
+		break;
+
+	case IRQ_TYPE_FSLSPECIAL:
+		opp->src[n_IRQ].ivpr &= ~(IVPR_POLARITY_MASK | IVPR_SENSE_MASK);
+		break;
+	}
+
+	openpic_update_irq(opp, n_IRQ);
+	DPRINTF("Set IVPR %d to 0x%08x -> 0x%08x\n", n_IRQ, val,
+		opp->src[n_IRQ].ivpr);
+}
+
+static void openpic_gcr_write(OpenPICState * opp, uint64_t val)
+{
+	bool mpic_proxy = false;
+
+	if (val & GCR_RESET) {
+		openpic_reset(&opp->busdev.qdev);
+		return;
+	}
+
+	opp->gcr &= ~opp->mpic_mode_mask;
+	opp->gcr |= val & opp->mpic_mode_mask;
+
+	/* Set external proxy mode */
+	if ((val & opp->mpic_mode_mask) == GCR_MODE_PROXY) {
+		mpic_proxy = true;
+	}
+
+	ppce500_set_mpic_proxy(mpic_proxy);
+}
+
+static void openpic_gbl_write(void *opaque, hwaddr addr, uint64_t val,
+			      unsigned len)
+{
+	OpenPICState *opp = opaque;
+	IRQDest *dst;
+	int idx;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n",
+		__func__, addr, val);
+	if (addr & 0xF) {
+		return;
+	}
+	switch (addr) {
+	case 0x00:		/* Block Revision Register1 (BRR1) is Readonly */
+		break;
+	case 0x40:
+	case 0x50:
+	case 0x60:
+	case 0x70:
+	case 0x80:
+	case 0x90:
+	case 0xA0:
+	case 0xB0:
+		openpic_cpu_write_internal(opp, addr, val, get_current_cpu());
+		break;
+	case 0x1000:		/* FRR */
+		break;
+	case 0x1020:		/* GCR */
+		openpic_gcr_write(opp, val);
+		break;
+	case 0x1080:		/* VIR */
+		break;
+	case 0x1090:		/* PIR */
+		for (idx = 0; idx < opp->nb_cpus; idx++) {
+			if ((val & (1 << idx)) && !(opp->pir & (1 << idx))) {
+				DPRINTF
+				    ("Raise OpenPIC RESET output for CPU %d\n",
+				     idx);
+				dst = &opp->dst[idx];
+				qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_RESET]);
+			} else if (!(val & (1 << idx))
+				   && (opp->pir & (1 << idx))) {
+				DPRINTF
+				    ("Lower OpenPIC RESET output for CPU %d\n",
+				     idx);
+				dst = &opp->dst[idx];
+				qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_RESET]);
+			}
+		}
+		opp->pir = val;
+		break;
+	case 0x10A0:		/* IPI_IVPR */
+	case 0x10B0:
+	case 0x10C0:
+	case 0x10D0:
+		{
+			int idx;
+			idx = (addr - 0x10A0) >> 4;
+			write_IRQreg_ivpr(opp, opp->irq_ipi0 + idx, val);
+		}
+		break;
+	case 0x10E0:		/* SPVE */
+		opp->spve = val & opp->vector_mask;
+		break;
+	default:
+		break;
+	}
+}
+
+static uint64_t openpic_gbl_read(void *opaque, hwaddr addr, unsigned len)
+{
+	OpenPICState *opp = opaque;
+	uint32_t retval;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr);
+	retval = 0xFFFFFFFF;
+	if (addr & 0xF) {
+		return retval;
+	}
+	switch (addr) {
+	case 0x1000:		/* FRR */
+		retval = opp->frr;
+		break;
+	case 0x1020:		/* GCR */
+		retval = opp->gcr;
+		break;
+	case 0x1080:		/* VIR */
+		retval = opp->vir;
+		break;
+	case 0x1090:		/* PIR */
+		retval = 0x00000000;
+		break;
+	case 0x00:		/* Block Revision Register1 (BRR1) */
+		retval = opp->brr1;
+		break;
+	case 0x40:
+	case 0x50:
+	case 0x60:
+	case 0x70:
+	case 0x80:
+	case 0x90:
+	case 0xA0:
+	case 0xB0:
+		retval =
+		    openpic_cpu_read_internal(opp, addr, get_current_cpu());
+		break;
+	case 0x10A0:		/* IPI_IVPR */
+	case 0x10B0:
+	case 0x10C0:
+	case 0x10D0:
+		{
+			int idx;
+			idx = (addr - 0x10A0) >> 4;
+			retval = read_IRQreg_ivpr(opp, opp->irq_ipi0 + idx);
+		}
+		break;
+	case 0x10E0:		/* SPVE */
+		retval = opp->spve;
+		break;
+	default:
+		break;
+	}
+	DPRINTF("%s: => 0x%08x\n", __func__, retval);
+
+	return retval;
+}
+
+static void openpic_tmr_write(void *opaque, hwaddr addr, uint64_t val,
+			      unsigned len)
+{
+	OpenPICState *opp = opaque;
+	int idx;
+
+	addr += 0x10f0;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n",
+		__func__, addr, val);
+	if (addr & 0xF) {
+		return;
+	}
+
+	if (addr == 0x10f0) {
+		/* TFRR */
+		opp->tfrr = val;
+		return;
+	}
+
+	idx = (addr >> 6) & 0x3;
+	addr = addr & 0x30;
+
+	switch (addr & 0x30) {
+	case 0x00:		/* TCCR */
+		break;
+	case 0x10:		/* TBCR */
+		if ((opp->timers[idx].tccr & TCCR_TOG) != 0 &&
+		    (val & TBCR_CI) == 0 &&
+		    (opp->timers[idx].tbcr & TBCR_CI) != 0) {
+			opp->timers[idx].tccr &= ~TCCR_TOG;
+		}
+		opp->timers[idx].tbcr = val;
+		break;
+	case 0x20:		/* TVPR */
+		write_IRQreg_ivpr(opp, opp->irq_tim0 + idx, val);
+		break;
+	case 0x30:		/* TDR */
+		write_IRQreg_idr(opp, opp->irq_tim0 + idx, val);
+		break;
+	}
+}
+
+static uint64_t openpic_tmr_read(void *opaque, hwaddr addr, unsigned len)
+{
+	OpenPICState *opp = opaque;
+	uint32_t retval = -1;
+	int idx;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr);
+	if (addr & 0xF) {
+		goto out;
+	}
+	idx = (addr >> 6) & 0x3;
+	if (addr == 0x0) {
+		/* TFRR */
+		retval = opp->tfrr;
+		goto out;
+	}
+	switch (addr & 0x30) {
+	case 0x00:		/* TCCR */
+		retval = opp->timers[idx].tccr;
+		break;
+	case 0x10:		/* TBCR */
+		retval = opp->timers[idx].tbcr;
+		break;
+	case 0x20:		/* TIPV */
+		retval = read_IRQreg_ivpr(opp, opp->irq_tim0 + idx);
+		break;
+	case 0x30:		/* TIDE (TIDR) */
+		retval = read_IRQreg_idr(opp, opp->irq_tim0 + idx);
+		break;
+	}
+
+out:
+	DPRINTF("%s: => 0x%08x\n", __func__, retval);
+
+	return retval;
+}
+
+static void openpic_src_write(void *opaque, hwaddr addr, uint64_t val,
+			      unsigned len)
+{
+	OpenPICState *opp = opaque;
+	int idx;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx " <= %08" PRIx64 "\n",
+		__func__, addr, val);
+
+	addr = addr & 0xffff;
+	idx = addr >> 5;
+
+	switch (addr & 0x1f) {
+	case 0x00:
+		write_IRQreg_ivpr(opp, idx, val);
+		break;
+	case 0x10:
+		write_IRQreg_idr(opp, idx, val);
+		break;
+	case 0x18:
+		write_IRQreg_ilr(opp, idx, val);
+		break;
+	}
+}
+
+static uint64_t openpic_src_read(void *opaque, uint64_t addr, unsigned len)
+{
+	OpenPICState *opp = opaque;
+	uint32_t retval;
+	int idx;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr);
+	retval = 0xFFFFFFFF;
+
+	addr = addr & 0xffff;
+	idx = addr >> 5;
+
+	switch (addr & 0x1f) {
+	case 0x00:
+		retval = read_IRQreg_ivpr(opp, idx);
+		break;
+	case 0x10:
+		retval = read_IRQreg_idr(opp, idx);
+		break;
+	case 0x18:
+		retval = read_IRQreg_ilr(opp, idx);
+		break;
+	}
+
+	DPRINTF("%s: => 0x%08x\n", __func__, retval);
+	return retval;
+}
+
+static void openpic_msi_write(void *opaque, hwaddr addr, uint64_t val,
+			      unsigned size)
+{
+	OpenPICState *opp = opaque;
+	int idx = opp->irq_msi;
+	int srs, ibs;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64 "\n",
+		__func__, addr, val);
+	if (addr & 0xF) {
+		return;
+	}
+
+	switch (addr) {
+	case MSIIR_OFFSET:
+		srs = val >> MSIIR_SRS_SHIFT;
+		idx += srs;
+		ibs = (val & MSIIR_IBS_MASK) >> MSIIR_IBS_SHIFT;
+		opp->msi[srs].msir |= 1 << ibs;
+		openpic_set_irq(opp, idx, 1);
+		break;
+	default:
+		/* most registers are read-only, thus ignored */
+		break;
+	}
+}
+
+static uint64_t openpic_msi_read(void *opaque, hwaddr addr, unsigned size)
+{
+	OpenPICState *opp = opaque;
+	uint64_t r = 0;
+	int i, srs;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr);
+	if (addr & 0xF) {
+		return -1;
+	}
+
+	srs = addr >> 4;
+
+	switch (addr) {
+	case 0x00:
+	case 0x10:
+	case 0x20:
+	case 0x30:
+	case 0x40:
+	case 0x50:
+	case 0x60:
+	case 0x70:		/* MSIRs */
+		r = opp->msi[srs].msir;
+		/* Clear on read */
+		opp->msi[srs].msir = 0;
+		openpic_set_irq(opp, opp->irq_msi + srs, 0);
+		break;
+	case 0x120:		/* MSISR */
+		for (i = 0; i < MAX_MSI; i++) {
+			r |= (opp->msi[i].msir ? 1 : 0) << i;
+		}
+		break;
+	}
+
+	return r;
+}
+
+static uint64_t openpic_summary_read(void *opaque, hwaddr addr, unsigned size)
+{
+	uint64_t r = 0;
+
+	DPRINTF("%s: addr %#" HWADDR_PRIx "\n", __func__, addr);
+
+	/* TODO: EISR/EIMR */
+
+	return r;
+}
+
+static void openpic_summary_write(void *opaque, hwaddr addr, uint64_t val,
+				  unsigned size)
+{
+	DPRINTF("%s: addr %#" HWADDR_PRIx " <= 0x%08" PRIx64 "\n",
+		__func__, addr, val);
+
+	/* TODO: EISR/EIMR */
+}
+
+static void openpic_cpu_write_internal(void *opaque, hwaddr addr,
+				       uint32_t val, int idx)
+{
+	OpenPICState *opp = opaque;
+	IRQSource *src;
+	IRQDest *dst;
+	int s_IRQ, n_IRQ;
+
+	DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx " <= 0x%08x\n", __func__, idx,
+		addr, val);
+
+	if (idx < 0) {
+		return;
+	}
+
+	if (addr & 0xF) {
+		return;
+	}
+	dst = &opp->dst[idx];
+	addr &= 0xFF0;
+	switch (addr) {
+	case 0x40:		/* IPIDR */
+	case 0x50:
+	case 0x60:
+	case 0x70:
+		idx = (addr - 0x40) >> 4;
+		/* we use IDE as mask which CPUs to deliver the IPI to still. */
+		opp->src[opp->irq_ipi0 + idx].destmask |= val;
+		openpic_set_irq(opp, opp->irq_ipi0 + idx, 1);
+		openpic_set_irq(opp, opp->irq_ipi0 + idx, 0);
+		break;
+	case 0x80:		/* CTPR */
+		dst->ctpr = val & 0x0000000F;
+
+		DPRINTF("%s: set CPU %d ctpr to %d, raised %d servicing %d\n",
+			__func__, idx, dst->ctpr, dst->raised.priority,
+			dst->servicing.priority);
+
+		if (dst->raised.priority <= dst->ctpr) {
+			DPRINTF
+			    ("%s: Lower OpenPIC INT output cpu %d due to ctpr\n",
+			     __func__, idx);
+			qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
+		} else if (dst->raised.priority > dst->servicing.priority) {
+			DPRINTF("%s: Raise OpenPIC INT output cpu %d irq %d\n",
+				__func__, idx, dst->raised.next);
+			qemu_irq_raise(dst->irqs[OPENPIC_OUTPUT_INT]);
+		}
+
+		break;
+	case 0x90:		/* WHOAMI */
+		/* Read-only register */
+		break;
+	case 0xA0:		/* IACK */
+		/* Read-only register */
+		break;
+	case 0xB0:		/* EOI */
+		DPRINTF("EOI\n");
+		s_IRQ = IRQ_get_next(opp, &dst->servicing);
+
+		if (s_IRQ < 0) {
+			DPRINTF("%s: EOI with no interrupt in service\n",
+				__func__);
+			break;
+		}
+
+		IRQ_resetbit(&dst->servicing, s_IRQ);
+		/* Set up next servicing IRQ */
+		s_IRQ = IRQ_get_next(opp, &dst->servicing);
+		/* Check queued interrupts. */
+		n_IRQ = IRQ_get_next(opp, &dst->raised);
+		src = &opp->src[n_IRQ];
+		if (n_IRQ != -1 &&
+		    (s_IRQ == -1 ||
+		     IVPR_PRIORITY(src->ivpr) > dst->servicing.priority)) {
+			DPRINTF("Raise OpenPIC INT output cpu %d irq %d\n",
+				idx, n_IRQ);
+			qemu_irq_raise(opp->dst[idx].irqs[OPENPIC_OUTPUT_INT]);
+		}
+		break;
+	default:
+		break;
+	}
+}
+
+static void openpic_cpu_write(void *opaque, hwaddr addr, uint64_t val,
+			      unsigned len)
+{
+	openpic_cpu_write_internal(opaque, addr, val, (addr & 0x1f000) >> 12);
+}
+
+static uint32_t openpic_iack(OpenPICState * opp, IRQDest * dst, int cpu)
+{
+	IRQSource *src;
+	int retval, irq;
+
+	DPRINTF("Lower OpenPIC INT output\n");
+	qemu_irq_lower(dst->irqs[OPENPIC_OUTPUT_INT]);
+
+	irq = IRQ_get_next(opp, &dst->raised);
+	DPRINTF("IACK: irq=%d\n", irq);
+
+	if (irq == -1) {
+		/* No more interrupt pending */
+		return opp->spve;
+	}
+
+	src = &opp->src[irq];
+	if (!(src->ivpr & IVPR_ACTIVITY_MASK) ||
+	    !(IVPR_PRIORITY(src->ivpr) > dst->ctpr)) {
+		fprintf(stderr, "%s: bad raised IRQ %d ctpr %d ivpr 0x%08x\n",
+			__func__, irq, dst->ctpr, src->ivpr);
+		openpic_update_irq(opp, irq);
+		retval = opp->spve;
+	} else {
+		/* IRQ enter servicing state */
+		IRQ_setbit(&dst->servicing, irq);
+		retval = IVPR_VECTOR(opp, src->ivpr);
+	}
+
+	if (!src->level) {
+		/* edge-sensitive IRQ */
+		src->ivpr &= ~IVPR_ACTIVITY_MASK;
+		src->pending = 0;
+		IRQ_resetbit(&dst->raised, irq);
+	}
+
+	if ((irq >= opp->irq_ipi0) && (irq < (opp->irq_ipi0 + MAX_IPI))) {
+		src->destmask &= ~(1 << cpu);
+		if (src->destmask && !src->level) {
+			/* trigger on CPUs that didn't know about it yet */
+			openpic_set_irq(opp, irq, 1);
+			openpic_set_irq(opp, irq, 0);
+			/* if all CPUs knew about it, set active bit again */
+			src->ivpr |= IVPR_ACTIVITY_MASK;
+		}
+	}
+
+	return retval;
+}
+
+static uint32_t openpic_cpu_read_internal(void *opaque, hwaddr addr, int idx)
+{
+	OpenPICState *opp = opaque;
+	IRQDest *dst;
+	uint32_t retval;
+
+	DPRINTF("%s: cpu %d addr %#" HWADDR_PRIx "\n", __func__, idx, addr);
+	retval = 0xFFFFFFFF;
+
+	if (idx < 0) {
+		return retval;
+	}
+
+	if (addr & 0xF) {
+		return retval;
+	}
+	dst = &opp->dst[idx];
+	addr &= 0xFF0;
+	switch (addr) {
+	case 0x80:		/* CTPR */
+		retval = dst->ctpr;
+		break;
+	case 0x90:		/* WHOAMI */
+		retval = idx;
+		break;
+	case 0xA0:		/* IACK */
+		retval = openpic_iack(opp, dst, idx);
+		break;
+	case 0xB0:		/* EOI */
+		retval = 0;
+		break;
+	default:
+		break;
+	}
+	DPRINTF("%s: => 0x%08x\n", __func__, retval);
+
+	return retval;
+}
+
+static uint64_t openpic_cpu_read(void *opaque, hwaddr addr, unsigned len)
+{
+	return openpic_cpu_read_internal(opaque, addr, (addr & 0x1f000) >> 12);
+}
+
+static const MemoryRegionOps openpic_glb_ops_le = {
+	.write = openpic_gbl_write,
+	.read = openpic_gbl_read,
+	.endianness = DEVICE_LITTLE_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_glb_ops_be = {
+	.write = openpic_gbl_write,
+	.read = openpic_gbl_read,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_tmr_ops_le = {
+	.write = openpic_tmr_write,
+	.read = openpic_tmr_read,
+	.endianness = DEVICE_LITTLE_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_tmr_ops_be = {
+	.write = openpic_tmr_write,
+	.read = openpic_tmr_read,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_cpu_ops_le = {
+	.write = openpic_cpu_write,
+	.read = openpic_cpu_read,
+	.endianness = DEVICE_LITTLE_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_cpu_ops_be = {
+	.write = openpic_cpu_write,
+	.read = openpic_cpu_read,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_src_ops_le = {
+	.write = openpic_src_write,
+	.read = openpic_src_read,
+	.endianness = DEVICE_LITTLE_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_src_ops_be = {
+	.write = openpic_src_write,
+	.read = openpic_src_read,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_msi_ops_be = {
+	.read = openpic_msi_read,
+	.write = openpic_msi_write,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static const MemoryRegionOps openpic_summary_ops_be = {
+	.read = openpic_summary_read,
+	.write = openpic_summary_write,
+	.endianness = DEVICE_BIG_ENDIAN,
+	.impl = {
+		 .min_access_size = 4,
+		 .max_access_size = 4,
+		 },
+};
+
+static void openpic_save_IRQ_queue(QEMUFile * f, IRQQueue * q)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(q->queue); i++) {
+		/* Always put the lower half of a 64-bit long first, in case we
+		 * restore on a 32-bit host.  The least significant bits correspond
+		 * to lower IRQ numbers in the bitmap.
+		 */
+		qemu_put_be32(f, (uint32_t) q->queue[i]);
+#if LONG_MAX > 0x7FFFFFFF
+		qemu_put_be32(f, (uint32_t) (q->queue[i] >> 32));
+#endif
+	}
+
+	qemu_put_sbe32s(f, &q->next);
+	qemu_put_sbe32s(f, &q->priority);
+}
+
+static void openpic_save(QEMUFile * f, void *opaque)
+{
+	OpenPICState *opp = (OpenPICState *) opaque;
+	unsigned int i;
+
+	qemu_put_be32s(f, &opp->gcr);
+	qemu_put_be32s(f, &opp->vir);
+	qemu_put_be32s(f, &opp->pir);
+	qemu_put_be32s(f, &opp->spve);
+	qemu_put_be32s(f, &opp->tfrr);
+
+	qemu_put_be32s(f, &opp->nb_cpus);
+
+	for (i = 0; i < opp->nb_cpus; i++) {
+		qemu_put_sbe32s(f, &opp->dst[i].ctpr);
+		openpic_save_IRQ_queue(f, &opp->dst[i].raised);
+		openpic_save_IRQ_queue(f, &opp->dst[i].servicing);
+		qemu_put_buffer(f, (uint8_t *) & opp->dst[i].outputs_active,
+				sizeof(opp->dst[i].outputs_active));
+	}
+
+	for (i = 0; i < MAX_TMR; i++) {
+		qemu_put_be32s(f, &opp->timers[i].tccr);
+		qemu_put_be32s(f, &opp->timers[i].tbcr);
+	}
+
+	for (i = 0; i < opp->max_irq; i++) {
+		qemu_put_be32s(f, &opp->src[i].ivpr);
+		qemu_put_be32s(f, &opp->src[i].idr);
+		qemu_get_be32s(f, &opp->src[i].destmask);
+		qemu_put_sbe32s(f, &opp->src[i].last_cpu);
+		qemu_put_sbe32s(f, &opp->src[i].pending);
+	}
+}
+
+static void openpic_load_IRQ_queue(QEMUFile * f, IRQQueue * q)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(q->queue); i++) {
+		unsigned long val;
+
+		val = qemu_get_be32(f);
+#if LONG_MAX > 0x7FFFFFFF
+		val <<= 32;
+		val |= qemu_get_be32(f);
+#endif
+
+		q->queue[i] = val;
+	}
+
+	qemu_get_sbe32s(f, &q->next);
+	qemu_get_sbe32s(f, &q->priority);
+}
+
+static int openpic_load(QEMUFile * f, void *opaque, int version_id)
+{
+	OpenPICState *opp = (OpenPICState *) opaque;
+	unsigned int i;
+
+	if (version_id != 1) {
+		return -EINVAL;
+	}
+
+	qemu_get_be32s(f, &opp->gcr);
+	qemu_get_be32s(f, &opp->vir);
+	qemu_get_be32s(f, &opp->pir);
+	qemu_get_be32s(f, &opp->spve);
+	qemu_get_be32s(f, &opp->tfrr);
+
+	qemu_get_be32s(f, &opp->nb_cpus);
+
+	for (i = 0; i < opp->nb_cpus; i++) {
+		qemu_get_sbe32s(f, &opp->dst[i].ctpr);
+		openpic_load_IRQ_queue(f, &opp->dst[i].raised);
+		openpic_load_IRQ_queue(f, &opp->dst[i].servicing);
+		qemu_get_buffer(f, (uint8_t *) & opp->dst[i].outputs_active,
+				sizeof(opp->dst[i].outputs_active));
+	}
+
+	for (i = 0; i < MAX_TMR; i++) {
+		qemu_get_be32s(f, &opp->timers[i].tccr);
+		qemu_get_be32s(f, &opp->timers[i].tbcr);
+	}
+
+	for (i = 0; i < opp->max_irq; i++) {
+		uint32_t val;
+
+		val = qemu_get_be32(f);
+		write_IRQreg_idr(opp, i, val);
+		val = qemu_get_be32(f);
+		write_IRQreg_ivpr(opp, i, val);
+
+		qemu_get_be32s(f, &opp->src[i].ivpr);
+		qemu_get_be32s(f, &opp->src[i].idr);
+		qemu_get_be32s(f, &opp->src[i].destmask);
+		qemu_get_sbe32s(f, &opp->src[i].last_cpu);
+		qemu_get_sbe32s(f, &opp->src[i].pending);
+	}
+
+	return 0;
+}
+
+typedef struct MemReg {
+	const char *name;
+	MemoryRegionOps const *ops;
+	hwaddr start_addr;
+	ram_addr_t size;
+} MemReg;
+
+static void fsl_common_init(OpenPICState * opp)
+{
+	int i;
+	int virq = MAX_SRC;
+
+	opp->vid = VID_REVISION_1_2;
+	opp->vir = VIR_GENERIC;
+	opp->vector_mask = 0xFFFF;
+	opp->tfrr_reset = 0;
+	opp->ivpr_reset = IVPR_MASK_MASK;
+	opp->idr_reset = 1 << 0;
+	opp->max_irq = MAX_IRQ;
+
+	opp->irq_ipi0 = virq;
+	virq += MAX_IPI;
+	opp->irq_tim0 = virq;
+	virq += MAX_TMR;
+
+	assert(virq <= MAX_IRQ);
+
+	opp->irq_msi = 224;
+
+	msi_supported = true;
+	for (i = 0; i < opp->fsl->max_ext; i++) {
+		opp->src[i].level = false;
+	}
+
+	/* Internal interrupts, including message and MSI */
+	for (i = 16; i < MAX_SRC; i++) {
+		opp->src[i].type = IRQ_TYPE_FSLINT;
+		opp->src[i].level = true;
+	}
+
+	/* timers and IPIs */
+	for (i = MAX_SRC; i < virq; i++) {
+		opp->src[i].type = IRQ_TYPE_FSLSPECIAL;
+		opp->src[i].level = false;
+	}
+}
+
+static void map_list(OpenPICState * opp, const MemReg * list, int *count)
+{
+	while (list->name) {
+		assert(*count < ARRAY_SIZE(opp->sub_io_mem));
+
+		memory_region_init_io(&opp->sub_io_mem[*count], list->ops, opp,
+				      list->name, list->size);
+
+		memory_region_add_subregion(&opp->mem, list->start_addr,
+					    &opp->sub_io_mem[*count]);
+
+		(*count)++;
+		list++;
+	}
+}
+
+static int openpic_init(SysBusDevice * dev)
+{
+	OpenPICState *opp = FROM_SYSBUS(typeof(*opp), dev);
+	int i, j;
+	int list_count = 0;
+	static const MemReg list_le[] = {
+		{"glb", &openpic_glb_ops_le,
+		 OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE},
+		{"tmr", &openpic_tmr_ops_le,
+		 OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE},
+		{"src", &openpic_src_ops_le,
+		 OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE},
+		{"cpu", &openpic_cpu_ops_le,
+		 OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE},
+		{NULL}
+	};
+	static const MemReg list_be[] = {
+		{"glb", &openpic_glb_ops_be,
+		 OPENPIC_GLB_REG_START, OPENPIC_GLB_REG_SIZE},
+		{"tmr", &openpic_tmr_ops_be,
+		 OPENPIC_TMR_REG_START, OPENPIC_TMR_REG_SIZE},
+		{"src", &openpic_src_ops_be,
+		 OPENPIC_SRC_REG_START, OPENPIC_SRC_REG_SIZE},
+		{"cpu", &openpic_cpu_ops_be,
+		 OPENPIC_CPU_REG_START, OPENPIC_CPU_REG_SIZE},
+		{NULL}
+	};
+	static const MemReg list_fsl[] = {
+		{"msi", &openpic_msi_ops_be,
+		 OPENPIC_MSI_REG_START, OPENPIC_MSI_REG_SIZE},
+		{"summary", &openpic_summary_ops_be,
+		 OPENPIC_SUMMARY_REG_START, OPENPIC_SUMMARY_REG_SIZE},
+		{NULL}
+	};
+
+	memory_region_init(&opp->mem, "openpic", 0x40000);
+
+	switch (opp->model) {
+	case OPENPIC_MODEL_FSL_MPIC_20:
+	default:
+		opp->fsl = &fsl_mpic_20;
+		opp->brr1 = 0x00400200;
+		opp->flags |= OPENPIC_FLAG_IDR_CRIT;
+		opp->nb_irqs = 80;
+		opp->mpic_mode_mask = GCR_MODE_MIXED;
+
+		fsl_common_init(opp);
+		map_list(opp, list_be, &list_count);
+		map_list(opp, list_fsl, &list_count);
+
+		break;
+
+	case OPENPIC_MODEL_FSL_MPIC_42:
+		opp->fsl = &fsl_mpic_42;
+		opp->brr1 = 0x00400402;
+		opp->flags |= OPENPIC_FLAG_ILR;
+		opp->nb_irqs = 196;
+		opp->mpic_mode_mask = GCR_MODE_PROXY;
+
+		fsl_common_init(opp);
+		map_list(opp, list_be, &list_count);
+		map_list(opp, list_fsl, &list_count);
+
+		break;
+
+	case OPENPIC_MODEL_RAVEN:
+		opp->nb_irqs = RAVEN_MAX_EXT;
+		opp->vid = VID_REVISION_1_3;
+		opp->vir = VIR_GENERIC;
+		opp->vector_mask = 0xFF;
+		opp->tfrr_reset = 4160000;
+		opp->ivpr_reset = IVPR_MASK_MASK | IVPR_MODE_MASK;
+		opp->idr_reset = 0;
+		opp->max_irq = RAVEN_MAX_IRQ;
+		opp->irq_ipi0 = RAVEN_IPI_IRQ;
+		opp->irq_tim0 = RAVEN_TMR_IRQ;
+		opp->brr1 = -1;
+		opp->mpic_mode_mask = GCR_MODE_MIXED;
+
+		/* Only UP supported today */
+		if (opp->nb_cpus != 1) {
+			return -EINVAL;
+		}
+
+		map_list(opp, list_le, &list_count);
+		break;
+	}
+
+	for (i = 0; i < opp->nb_cpus; i++) {
+		opp->dst[i].irqs = g_new(qemu_irq, OPENPIC_OUTPUT_NB);
+		for (j = 0; j < OPENPIC_OUTPUT_NB; j++) {
+			sysbus_init_irq(dev, &opp->dst[i].irqs[j]);
+		}
+	}
+
+	register_savevm(&opp->busdev.qdev, "openpic", 0, 2,
+			openpic_save, openpic_load, opp);
+
+	sysbus_init_mmio(dev, &opp->mem);
+	qdev_init_gpio_in(&dev->qdev, openpic_set_irq, opp->max_irq);
+
+	return 0;
+}
+
+static Property openpic_properties[] = {
+	DEFINE_PROP_UINT32("model", OpenPICState, model,
+			   OPENPIC_MODEL_FSL_MPIC_20),
+	DEFINE_PROP_UINT32("nb_cpus", OpenPICState, nb_cpus, 1),
+	DEFINE_PROP_END_OF_LIST(),
+};
+
+static void openpic_class_init(ObjectClass * klass, void *data)
+{
+	DeviceClass *dc = DEVICE_CLASS(klass);
+	SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
+
+	k->init = openpic_init;
+	dc->props = openpic_properties;
+	dc->reset = openpic_reset;
+}
+
+static const TypeInfo openpic_info = {
+	.name = "openpic",
+	.parent = TYPE_SYS_BUS_DEVICE,
+	.instance_size = sizeof(OpenPICState),
+	.class_init = openpic_class_init,
+};
+
+static void openpic_register_types(void)
+{
+	type_register_static(&openpic_info);
+}
+
+type_init(openpic_register_types)