include/hw/intc/arm_gicv3_common.h - qemu - Git at Google

 /*
  * ARM GIC support
  *
  * Copyright (c) 2012 Linaro Limited
  * Copyright (c) 2015 Huawei.
  * Copyright (c) 2015 Samsung Electronics Co., Ltd.
  * Written by Peter Maydell
  * Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, see <http://www.gnu.org/licenses/>.
  */

 #ifndef HW_ARM_GICV3_COMMON_H
 #define HW_ARM_GICV3_COMMON_H

 #include "hw/sysbus.h"
 #include "hw/intc/arm_gic_common.h"

 /*
  * Maximum number of possible interrupts, determined by the GIC architecture.
  * Note that this does not include LPIs. When implemented, these should be
  * dealt with separately.
  */
 #define GICV3_MAXIRQ 1020
 #define GICV3_MAXSPI (GICV3_MAXIRQ - GIC_INTERNAL)

 #define GICV3_REDIST_SIZE 0x20000

 /* Number of SGI target-list bits */
 #define GICV3_TARGETLIST_BITS 16

 /* Maximum number of list registers (architectural limit) */
 #define GICV3_LR_MAX 16

 /* Minimum BPR for Secure, or when security not enabled */
 #define GIC_MIN_BPR 0
 /* Minimum BPR for Nonsecure when security is enabled */
 #define GIC_MIN_BPR_NS (GIC_MIN_BPR + 1)

 /* For some distributor fields we want to model the array of 32-bit
  * register values which hold various bitmaps corresponding to enabled,
  * pending, etc bits. These macros and functions facilitate that; the
  * APIs are generally modelled on the generic bitmap.h functions
  * (which are unsuitable here because they use 'unsigned long' as the
  * underlying storage type, which is very awkward when you need to
  * access the data as 32-bit values.)
  * Each bitmap contains a bit for each interrupt. Although there is
  * space for the PPIs and SGIs, those bits (the first 32) are never
  * used as that state lives in the redistributor. The unused bits are
  * provided purely so that interrupt X's state is always in bit X; this
  * avoids bugs where we forget to subtract GIC_INTERNAL from an
  * interrupt number.
  */
 #define GICV3_BMP_SIZE DIV_ROUND_UP(GICV3_MAXIRQ, 32)

 #define GIC_DECLARE_BITMAP(name) \
     uint32_t name[GICV3_BMP_SIZE]

 #define GIC_BIT_MASK(nr) (1U << ((nr) % 32))
 #define GIC_BIT_WORD(nr) ((nr) / 32)

 static inline void gic_bmp_set_bit(int nr, uint32_t *addr)
 {
     uint32_t mask = GIC_BIT_MASK(nr);
     uint32_t *p = addr + GIC_BIT_WORD(nr);

     *p |= mask;
 }

 static inline void gic_bmp_clear_bit(int nr, uint32_t *addr)
 {
     uint32_t mask = GIC_BIT_MASK(nr);
     uint32_t *p = addr + GIC_BIT_WORD(nr);

     *p &= ~mask;
 }

 static inline int gic_bmp_test_bit(int nr, const uint32_t *addr)
 {
     return 1U & (addr[GIC_BIT_WORD(nr)] >> (nr & 31));
 }

 static inline void gic_bmp_replace_bit(int nr, uint32_t *addr, int val)
 {
     uint32_t mask = GIC_BIT_MASK(nr);
     uint32_t *p = addr + GIC_BIT_WORD(nr);

     *p &= ~mask;
     *p |= (val & 1U) << (nr % 32);
 }

 /* Return a pointer to the 32-bit word containing the specified bit. */
 static inline uint32_t *gic_bmp_ptr32(uint32_t *addr, int nr)
 {
     return addr + GIC_BIT_WORD(nr);
 }

 typedef struct GICv3State GICv3State;
 typedef struct GICv3CPUState GICv3CPUState;

 /* Some CPU interface registers come in three flavours:
  * Group0, Group1 (Secure) and Group1 (NonSecure)
  * (where the latter two are exposed as a single banked system register).
  * In the state struct they are implemented as a 3-element array which
  * can be indexed into by the GICV3_G0, GICV3_G1 and GICV3_G1NS constants.
  * If the CPU doesn't support EL3 then the G1 element is unused.
  *
  * These constants are also used to communicate the group to use for
  * an interrupt or SGI when it is passed between the cpu interface and
  * the redistributor or distributor. For those purposes the receiving end
  * must be prepared to cope with a Group 1 Secure interrupt even if it does
  * not have security support enabled, because security can be disabled
  * independently in the CPU and in the GIC. In that case the receiver should
  * treat an incoming Group 1 Secure interrupt as if it were Group 0.
  * (This architectural requirement is why the _G1 element is the unused one
  * in a no-EL3 CPU:  we would otherwise have to translate back and forth
  * between (G0, G1NS) from the distributor and (G0, G1) in the CPU i/f.)
  */
 #define GICV3_G0 0
 #define GICV3_G1 1
 #define GICV3_G1NS 2

 /* ICC_CTLR_EL1, GICD_STATUSR and GICR_STATUSR are banked but not
  * group-related, so those indices are just 0 for S and 1 for NS.
  * (If the CPU or the GIC, respectively, don't support the Security
  * extensions then the S element is unused.)
  */
 #define GICV3_S 0
 #define GICV3_NS 1

 typedef struct {
     int irq;
     uint8_t prio;
     int grp;
 } PendingIrq;

 struct GICv3CPUState {
     GICv3State *gic;
     CPUState *cpu;
     qemu_irq parent_irq;
     qemu_irq parent_fiq;
     qemu_irq parent_virq;
     qemu_irq parent_vfiq;
     qemu_irq maintenance_irq;

     /* Redistributor */
     uint32_t level;                  /* Current IRQ level */
     /* RD_base page registers */
     uint32_t gicr_ctlr;
     uint64_t gicr_typer;
     uint32_t gicr_statusr[2];
     uint32_t gicr_waker;
     uint64_t gicr_propbaser;
     uint64_t gicr_pendbaser;
     /* SGI_base page registers */
     uint32_t gicr_igroupr0;
     uint32_t gicr_ienabler0;
     uint32_t gicr_ipendr0;
     uint32_t gicr_iactiver0;
     uint32_t edge_trigger; /* ICFGR0 and ICFGR1 even bits */
     uint32_t gicr_igrpmodr0;
     uint32_t gicr_nsacr;
     uint8_t gicr_ipriorityr[GIC_INTERNAL];

     /* CPU interface */
     uint64_t icc_sre_el1;
     uint64_t icc_ctlr_el1[2];
     uint64_t icc_pmr_el1;
     uint64_t icc_bpr[3];
     uint64_t icc_apr[3][4];
     uint64_t icc_igrpen[3];
     uint64_t icc_ctlr_el3;

     /* Virtualization control interface */
     uint64_t ich_apr[3][4]; /* ich_apr[GICV3_G1][x] never used */
     uint64_t ich_hcr_el2;
     uint64_t ich_lr_el2[GICV3_LR_MAX];
     uint64_t ich_vmcr_el2;

     /* Properties of the CPU interface. These are initialized from
      * the settings in the CPU proper.
      * If the number of implemented list registers is 0 then the
      * virtualization support is not implemented.
      */
     int num_list_regs;
     int vpribits; /* number of virtual priority bits */
     int vprebits; /* number of virtual preemption bits */

     /* Current highest priority pending interrupt for this CPU.
      * This is cached information that can be recalculated from the
      * real state above; it doesn't need to be migrated.
      */
     PendingIrq hppi;
     /* This is temporary working state, to avoid a malloc in gicv3_update() */
     bool seenbetter;
 };

 struct GICv3State {
     /*< private >*/
     SysBusDevice parent_obj;
     /*< public >*/

     MemoryRegion iomem_dist; /* Distributor */
     MemoryRegion *iomem_redist; /* Redistributor Regions */
     uint32_t *redist_region_count; /* redistributor count within each region */
     uint32_t nb_redist_regions; /* number of redist regions */

     uint32_t num_cpu;
     uint32_t num_irq;
     uint32_t revision;
     bool security_extn;
     bool irq_reset_nonsecure;
     bool gicd_no_migration_shift_bug;

     int dev_fd; /* kvm device fd if backed by kvm vgic support */
     Error *migration_blocker;

     /* Distributor */

     /* for a GIC with the security extensions the NS banked version of this
      * register is just an alias of bit 1 of the S banked version.
      */
     uint32_t gicd_ctlr;
     uint32_t gicd_statusr[2];
     GIC_DECLARE_BITMAP(group);        /* GICD_IGROUPR */
     GIC_DECLARE_BITMAP(grpmod);       /* GICD_IGRPMODR */
     GIC_DECLARE_BITMAP(enabled);      /* GICD_ISENABLER */
     GIC_DECLARE_BITMAP(pending);      /* GICD_ISPENDR */
     GIC_DECLARE_BITMAP(active);       /* GICD_ISACTIVER */
     GIC_DECLARE_BITMAP(level);        /* Current level */
     GIC_DECLARE_BITMAP(edge_trigger); /* GICD_ICFGR even bits */
     uint8_t gicd_ipriority[GICV3_MAXIRQ];
     uint64_t gicd_irouter[GICV3_MAXIRQ];
     /* Cached information: pointer to the cpu i/f for the CPUs specified
      * in the IROUTER registers
      */
     GICv3CPUState *gicd_irouter_target[GICV3_MAXIRQ];
     uint32_t gicd_nsacr[DIV_ROUND_UP(GICV3_MAXIRQ, 16)];

     GICv3CPUState *cpu;
 };

 #define GICV3_BITMAP_ACCESSORS(BMP)                                     \
     static inline void gicv3_gicd_##BMP##_set(GICv3State *s, int irq)   \
     {                                                                   \
         gic_bmp_set_bit(irq, s->BMP);                                   \
     }                                                                   \
     static inline int gicv3_gicd_##BMP##_test(GICv3State *s, int irq)   \
     {                                                                   \
         return gic_bmp_test_bit(irq, s->BMP);                           \
     }                                                                   \
     static inline void gicv3_gicd_##BMP##_clear(GICv3State *s, int irq) \
     {                                                                   \
         gic_bmp_clear_bit(irq, s->BMP);                                 \
     }                                                                   \
     static inline void gicv3_gicd_##BMP##_replace(GICv3State *s,        \
                                                   int irq, int value)   \
     {                                                                   \
         gic_bmp_replace_bit(irq, s->BMP, value);                        \
     }

 GICV3_BITMAP_ACCESSORS(group)
 GICV3_BITMAP_ACCESSORS(grpmod)
 GICV3_BITMAP_ACCESSORS(enabled)
 GICV3_BITMAP_ACCESSORS(pending)
 GICV3_BITMAP_ACCESSORS(active)
 GICV3_BITMAP_ACCESSORS(level)
 GICV3_BITMAP_ACCESSORS(edge_trigger)

 #define TYPE_ARM_GICV3_COMMON "arm-gicv3-common"
 #define ARM_GICV3_COMMON(obj) \
      OBJECT_CHECK(GICv3State, (obj), TYPE_ARM_GICV3_COMMON)
 #define ARM_GICV3_COMMON_CLASS(klass) \
      OBJECT_CLASS_CHECK(ARMGICv3CommonClass, (klass), TYPE_ARM_GICV3_COMMON)
 #define ARM_GICV3_COMMON_GET_CLASS(obj) \
      OBJECT_GET_CLASS(ARMGICv3CommonClass, (obj), TYPE_ARM_GICV3_COMMON)

 typedef struct ARMGICv3CommonClass {
     /*< private >*/
     SysBusDeviceClass parent_class;
     /*< public >*/

     void (*pre_save)(GICv3State *s);
     void (*post_load)(GICv3State *s);
 } ARMGICv3CommonClass;

 void gicv3_init_irqs_and_mmio(GICv3State *s, qemu_irq_handler handler,
                               const MemoryRegionOps *ops, Error **errp);

 #endif
	/*
	* ARM GIC support
	*
	* Copyright (c) 2012 Linaro Limited
	* Copyright (c) 2015 Huawei.
	* Copyright (c) 2015 Samsung Electronics Co., Ltd.
	* Written by Peter Maydell
	* Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, see <http://www.gnu.org/licenses/>.
	*/

	#ifndef HW_ARM_GICV3_COMMON_H
	#define HW_ARM_GICV3_COMMON_H

	#include "hw/sysbus.h"
	#include "hw/intc/arm_gic_common.h"

	/*
	* Maximum number of possible interrupts, determined by the GIC architecture.
	* Note that this does not include LPIs. When implemented, these should be
	* dealt with separately.
	*/
	#define GICV3_MAXIRQ 1020
	#define GICV3_MAXSPI (GICV3_MAXIRQ - GIC_INTERNAL)

	#define GICV3_REDIST_SIZE 0x20000

	/* Number of SGI target-list bits */
	#define GICV3_TARGETLIST_BITS 16

	/* Maximum number of list registers (architectural limit) */
	#define GICV3_LR_MAX 16

	/* Minimum BPR for Secure, or when security not enabled */
	#define GIC_MIN_BPR 0
	/* Minimum BPR for Nonsecure when security is enabled */
	#define GIC_MIN_BPR_NS (GIC_MIN_BPR + 1)

	/* For some distributor fields we want to model the array of 32-bit
	* register values which hold various bitmaps corresponding to enabled,
	* pending, etc bits. These macros and functions facilitate that; the
	* APIs are generally modelled on the generic bitmap.h functions
	* (which are unsuitable here because they use 'unsigned long' as the
	* underlying storage type, which is very awkward when you need to
	* access the data as 32-bit values.)
	* Each bitmap contains a bit for each interrupt. Although there is
	* space for the PPIs and SGIs, those bits (the first 32) are never
	* used as that state lives in the redistributor. The unused bits are
	* provided purely so that interrupt X's state is always in bit X; this
	* avoids bugs where we forget to subtract GIC_INTERNAL from an
	* interrupt number.
	*/
	#define GICV3_BMP_SIZE DIV_ROUND_UP(GICV3_MAXIRQ, 32)

	#define GIC_DECLARE_BITMAP(name) \
	uint32_t name[GICV3_BMP_SIZE]

	#define GIC_BIT_MASK(nr) (1U << ((nr) % 32))
	#define GIC_BIT_WORD(nr) ((nr) / 32)

	static inline void gic_bmp_set_bit(int nr, uint32_t *addr)
	{
	uint32_t mask = GIC_BIT_MASK(nr);
	uint32_t *p = addr + GIC_BIT_WORD(nr);

	*p \|= mask;
	}

	static inline void gic_bmp_clear_bit(int nr, uint32_t *addr)
	{
	uint32_t mask = GIC_BIT_MASK(nr);
	uint32_t *p = addr + GIC_BIT_WORD(nr);

	*p &= ~mask;
	}

	static inline int gic_bmp_test_bit(int nr, const uint32_t *addr)
	{
	return 1U & (addr[GIC_BIT_WORD(nr)] >> (nr & 31));
	}

	static inline void gic_bmp_replace_bit(int nr, uint32_t *addr, int val)
	{
	uint32_t mask = GIC_BIT_MASK(nr);
	uint32_t *p = addr + GIC_BIT_WORD(nr);

	*p &= ~mask;
	*p \|= (val & 1U) << (nr % 32);
	}

	/* Return a pointer to the 32-bit word containing the specified bit. */
	static inline uint32_t gic_bmp_ptr32(uint32_t addr, int nr)
	{
	return addr + GIC_BIT_WORD(nr);
	}

	typedef struct GICv3State GICv3State;
	typedef struct GICv3CPUState GICv3CPUState;

	/* Some CPU interface registers come in three flavours:
	* Group0, Group1 (Secure) and Group1 (NonSecure)
	* (where the latter two are exposed as a single banked system register).
	* In the state struct they are implemented as a 3-element array which
	* can be indexed into by the GICV3_G0, GICV3_G1 and GICV3_G1NS constants.
	* If the CPU doesn't support EL3 then the G1 element is unused.
	*
	* These constants are also used to communicate the group to use for
	* an interrupt or SGI when it is passed between the cpu interface and
	* the redistributor or distributor. For those purposes the receiving end
	* must be prepared to cope with a Group 1 Secure interrupt even if it does
	* not have security support enabled, because security can be disabled
	* independently in the CPU and in the GIC. In that case the receiver should
	* treat an incoming Group 1 Secure interrupt as if it were Group 0.
	* (This architectural requirement is why the _G1 element is the unused one
	* in a no-EL3 CPU: we would otherwise have to translate back and forth
	* between (G0, G1NS) from the distributor and (G0, G1) in the CPU i/f.)
	*/
	#define GICV3_G0 0
	#define GICV3_G1 1
	#define GICV3_G1NS 2

	/* ICC_CTLR_EL1, GICD_STATUSR and GICR_STATUSR are banked but not
	* group-related, so those indices are just 0 for S and 1 for NS.
	* (If the CPU or the GIC, respectively, don't support the Security
	* extensions then the S element is unused.)
	*/
	#define GICV3_S 0
	#define GICV3_NS 1

	typedef struct {
	int irq;
	uint8_t prio;
	int grp;
	} PendingIrq;

	struct GICv3CPUState {
	GICv3State *gic;
	CPUState *cpu;
	qemu_irq parent_irq;
	qemu_irq parent_fiq;
	qemu_irq parent_virq;
	qemu_irq parent_vfiq;
	qemu_irq maintenance_irq;

	/* Redistributor */
	uint32_t level; /* Current IRQ level */
	/* RD_base page registers */
	uint32_t gicr_ctlr;
	uint64_t gicr_typer;
	uint32_t gicr_statusr[2];
	uint32_t gicr_waker;
	uint64_t gicr_propbaser;
	uint64_t gicr_pendbaser;
	/* SGI_base page registers */
	uint32_t gicr_igroupr0;
	uint32_t gicr_ienabler0;
	uint32_t gicr_ipendr0;
	uint32_t gicr_iactiver0;
	uint32_t edge_trigger; /* ICFGR0 and ICFGR1 even bits */
	uint32_t gicr_igrpmodr0;
	uint32_t gicr_nsacr;
	uint8_t gicr_ipriorityr[GIC_INTERNAL];

	/* CPU interface */
	uint64_t icc_sre_el1;
	uint64_t icc_ctlr_el1[2];
	uint64_t icc_pmr_el1;
	uint64_t icc_bpr[3];
	uint64_t icc_apr[3][4];
	uint64_t icc_igrpen[3];
	uint64_t icc_ctlr_el3;

	/* Virtualization control interface */
	uint64_t ich_apr[3][4]; /* ich_apr[GICV3_G1][x] never used */
	uint64_t ich_hcr_el2;
	uint64_t ich_lr_el2[GICV3_LR_MAX];
	uint64_t ich_vmcr_el2;

	/* Properties of the CPU interface. These are initialized from
	* the settings in the CPU proper.
	* If the number of implemented list registers is 0 then the
	* virtualization support is not implemented.
	*/
	int num_list_regs;
	int vpribits; /* number of virtual priority bits */
	int vprebits; /* number of virtual preemption bits */

	/* Current highest priority pending interrupt for this CPU.
	* This is cached information that can be recalculated from the
	* real state above; it doesn't need to be migrated.
	*/
	PendingIrq hppi;
	/* This is temporary working state, to avoid a malloc in gicv3_update() */
	bool seenbetter;
	};

	struct GICv3State {
	/< private >/
	SysBusDevice parent_obj;
	/< public >/

	MemoryRegion iomem_dist; /* Distributor */
	MemoryRegion iomem_redist; / Redistributor Regions */
	uint32_t redist_region_count; / redistributor count within each region */
	uint32_t nb_redist_regions; /* number of redist regions */

	uint32_t num_cpu;
	uint32_t num_irq;
	uint32_t revision;
	bool security_extn;
	bool irq_reset_nonsecure;
	bool gicd_no_migration_shift_bug;

	int dev_fd; /* kvm device fd if backed by kvm vgic support */
	Error *migration_blocker;

	/* Distributor */

	/* for a GIC with the security extensions the NS banked version of this
	* register is just an alias of bit 1 of the S banked version.
	*/
	uint32_t gicd_ctlr;
	uint32_t gicd_statusr[2];
	GIC_DECLARE_BITMAP(group); /* GICD_IGROUPR */
	GIC_DECLARE_BITMAP(grpmod); /* GICD_IGRPMODR */
	GIC_DECLARE_BITMAP(enabled); /* GICD_ISENABLER */
	GIC_DECLARE_BITMAP(pending); /* GICD_ISPENDR */
	GIC_DECLARE_BITMAP(active); /* GICD_ISACTIVER */
	GIC_DECLARE_BITMAP(level); /* Current level */
	GIC_DECLARE_BITMAP(edge_trigger); /* GICD_ICFGR even bits */
	uint8_t gicd_ipriority[GICV3_MAXIRQ];
	uint64_t gicd_irouter[GICV3_MAXIRQ];
	/* Cached information: pointer to the cpu i/f for the CPUs specified
	* in the IROUTER registers
	*/
	GICv3CPUState *gicd_irouter_target[GICV3_MAXIRQ];
	uint32_t gicd_nsacr[DIV_ROUND_UP(GICV3_MAXIRQ, 16)];

	GICv3CPUState *cpu;
	};

	#define GICV3_BITMAP_ACCESSORS(BMP) \
	static inline void gicv3_gicd_##BMP##_set(GICv3State *s, int irq) \
	{ \
	gic_bmp_set_bit(irq, s->BMP); \
	} \
	static inline int gicv3_gicd_##BMP##_test(GICv3State *s, int irq) \
	{ \
	return gic_bmp_test_bit(irq, s->BMP); \
	} \
	static inline void gicv3_gicd_##BMP##_clear(GICv3State *s, int irq) \
	{ \
	gic_bmp_clear_bit(irq, s->BMP); \
	} \
	static inline void gicv3_gicd_##BMP##_replace(GICv3State *s, \
	int irq, int value) \
	{ \
	gic_bmp_replace_bit(irq, s->BMP, value); \
	}

	GICV3_BITMAP_ACCESSORS(group)
	GICV3_BITMAP_ACCESSORS(grpmod)
	GICV3_BITMAP_ACCESSORS(enabled)
	GICV3_BITMAP_ACCESSORS(pending)
	GICV3_BITMAP_ACCESSORS(active)
	GICV3_BITMAP_ACCESSORS(level)
	GICV3_BITMAP_ACCESSORS(edge_trigger)

	#define TYPE_ARM_GICV3_COMMON "arm-gicv3-common"
	#define ARM_GICV3_COMMON(obj) \
	OBJECT_CHECK(GICv3State, (obj), TYPE_ARM_GICV3_COMMON)
	#define ARM_GICV3_COMMON_CLASS(klass) \
	OBJECT_CLASS_CHECK(ARMGICv3CommonClass, (klass), TYPE_ARM_GICV3_COMMON)
	#define ARM_GICV3_COMMON_GET_CLASS(obj) \
	OBJECT_GET_CLASS(ARMGICv3CommonClass, (obj), TYPE_ARM_GICV3_COMMON)

	typedef struct ARMGICv3CommonClass {
	/< private >/
	SysBusDeviceClass parent_class;
	/< public >/

	void (pre_save)(GICv3State s);
	void (post_load)(GICv3State s);
	} ARMGICv3CommonClass;

	void gicv3_init_irqs_and_mmio(GICv3State *s, qemu_irq_handler handler,
	const MemoryRegionOps ops, Error *errp);

	#endif