142 lines
5.2 KiB
C
142 lines
5.2 KiB
C
/*
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* ARM GIC support - internal interfaces
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*
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* Copyright (c) 2012 Linaro Limited
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* Written by Peter Maydell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef QEMU_ARM_GIC_INTERNAL_H
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#define QEMU_ARM_GIC_INTERNAL_H
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#include "hw/sysbus.h"
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/* Maximum number of possible interrupts, determined by the GIC architecture */
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#define GIC_MAXIRQ 1020
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/* First 32 are private to each CPU (SGIs and PPIs). */
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#define GIC_INTERNAL 32
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/* Maximum number of possible CPU interfaces, determined by GIC architecture */
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#define NCPU 8
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#define ALL_CPU_MASK ((unsigned)(((1 << NCPU) - 1)))
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/* The NVIC has 16 internal vectors. However these are not exposed
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through the normal GIC interface. */
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#define GIC_BASE_IRQ ((s->revision == REV_NVIC) ? 32 : 0)
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#define GIC_SET_ENABLED(irq, cm) s->irq_state[irq].enabled |= (cm)
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#define GIC_CLEAR_ENABLED(irq, cm) s->irq_state[irq].enabled &= ~(cm)
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#define GIC_TEST_ENABLED(irq, cm) ((s->irq_state[irq].enabled & (cm)) != 0)
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#define GIC_SET_PENDING(irq, cm) s->irq_state[irq].pending |= (cm)
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#define GIC_CLEAR_PENDING(irq, cm) s->irq_state[irq].pending &= ~(cm)
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#define GIC_TEST_PENDING(irq, cm) ((s->irq_state[irq].pending & (cm)) != 0)
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#define GIC_SET_ACTIVE(irq, cm) s->irq_state[irq].active |= (cm)
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#define GIC_CLEAR_ACTIVE(irq, cm) s->irq_state[irq].active &= ~(cm)
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#define GIC_TEST_ACTIVE(irq, cm) ((s->irq_state[irq].active & (cm)) != 0)
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#define GIC_SET_MODEL(irq) s->irq_state[irq].model = true
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#define GIC_CLEAR_MODEL(irq) s->irq_state[irq].model = false
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#define GIC_TEST_MODEL(irq) s->irq_state[irq].model
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#define GIC_SET_LEVEL(irq, cm) s->irq_state[irq].level = (cm)
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#define GIC_CLEAR_LEVEL(irq, cm) s->irq_state[irq].level &= ~(cm)
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#define GIC_TEST_LEVEL(irq, cm) ((s->irq_state[irq].level & (cm)) != 0)
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#define GIC_SET_TRIGGER(irq) s->irq_state[irq].trigger = true
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#define GIC_CLEAR_TRIGGER(irq) s->irq_state[irq].trigger = false
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#define GIC_TEST_TRIGGER(irq) s->irq_state[irq].trigger
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#define GIC_GET_PRIORITY(irq, cpu) (((irq) < GIC_INTERNAL) ? \
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s->priority1[irq][cpu] : \
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s->priority2[(irq) - GIC_INTERNAL])
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#define GIC_TARGET(irq) s->irq_target[irq]
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typedef struct gic_irq_state {
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/* The enable bits are only banked for per-cpu interrupts. */
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uint8_t enabled;
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uint8_t pending;
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uint8_t active;
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uint8_t level;
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bool model; /* 0 = N:N, 1 = 1:N */
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bool trigger; /* nonzero = edge triggered. */
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} gic_irq_state;
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typedef struct GICState {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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qemu_irq parent_irq[NCPU];
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bool enabled;
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bool cpu_enabled[NCPU];
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gic_irq_state irq_state[GIC_MAXIRQ];
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uint8_t irq_target[GIC_MAXIRQ];
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uint8_t priority1[GIC_INTERNAL][NCPU];
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uint8_t priority2[GIC_MAXIRQ - GIC_INTERNAL];
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uint16_t last_active[GIC_MAXIRQ][NCPU];
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uint16_t priority_mask[NCPU];
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uint16_t running_irq[NCPU];
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uint16_t running_priority[NCPU];
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uint16_t current_pending[NCPU];
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uint32_t num_cpu;
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MemoryRegion iomem; /* Distributor */
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/* This is just so we can have an opaque pointer which identifies
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* both this GIC and which CPU interface we should be accessing.
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*/
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struct GICState *backref[NCPU];
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MemoryRegion cpuiomem[NCPU+1]; /* CPU interfaces */
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uint32_t num_irq;
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uint32_t revision;
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} GICState;
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/* The special cases for the revision property: */
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#define REV_11MPCORE 0
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#define REV_NVIC 0xffffffff
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void gic_set_pending_private(GICState *s, int cpu, int irq);
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uint32_t gic_acknowledge_irq(GICState *s, int cpu);
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void gic_complete_irq(GICState *s, int cpu, int irq);
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void gic_update(GICState *s);
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void gic_init_irqs_and_distributor(GICState *s, int num_irq);
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#define TYPE_ARM_GIC_COMMON "arm_gic_common"
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#define ARM_GIC_COMMON(obj) \
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OBJECT_CHECK(GICState, (obj), TYPE_ARM_GIC_COMMON)
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#define ARM_GIC_COMMON_CLASS(klass) \
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OBJECT_CLASS_CHECK(ARMGICCommonClass, (klass), TYPE_ARM_GIC_COMMON)
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#define ARM_GIC_COMMON_GET_CLASS(obj) \
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OBJECT_GET_CLASS(ARMGICCommonClass, (obj), TYPE_ARM_GIC_COMMON)
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typedef struct ARMGICCommonClass {
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SysBusDeviceClass parent_class;
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void (*pre_save)(GICState *s);
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void (*post_load)(GICState *s);
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} ARMGICCommonClass;
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#define TYPE_ARM_GIC "arm_gic"
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#define ARM_GIC(obj) \
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OBJECT_CHECK(GICState, (obj), TYPE_ARM_GIC)
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#define ARM_GIC_CLASS(klass) \
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OBJECT_CLASS_CHECK(ARMGICClass, (klass), TYPE_ARM_GIC)
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#define ARM_GIC_GET_CLASS(obj) \
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OBJECT_GET_CLASS(ARMGICClass, (obj), TYPE_ARM_GIC)
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typedef struct ARMGICClass {
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ARMGICCommonClass parent_class;
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DeviceRealize parent_realize;
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} ARMGICClass;
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#endif /* !QEMU_ARM_GIC_INTERNAL_H */
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