11411489da
The GICv2 allows the implementation to implement a variable number of priority bits; unimplemented bits in the priority registers are read as zeros, writes ignored. We were previously always implementing a full 8 bits of priority, which is allowed but not what the real hardware typically does (which is usually to have 4 or 5 bits of priority). Add a new device property to allow the number of implemented property bits to be specified. Signed-off-by: Sai Pavan Boddu <sai.pavan.boddu@xilinx.com> Message-id: 1582537164-764-2-git-send-email-sai.pavan.boddu@xilinx.com Suggested-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: improved commit message] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*
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* ARM GIC support
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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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/*
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* QEMU interface:
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* + QOM property "num-cpu": number of CPUs to support
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* + QOM property "num-irq": number of IRQs (including both SPIs and PPIs)
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* + QOM property "revision": GIC version (1 or 2), or 0 for the 11MPCore GIC
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* + QOM property "has-security-extensions": set true if the GIC should
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* implement the security extensions
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* + QOM property "has-virtualization-extensions": set true if the GIC should
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* implement the virtualization extensions
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* + unnamed GPIO inputs: (where P is number of SPIs, i.e. num-irq - 32)
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* [0..P-1] SPIs
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* [P..P+31] PPIs for CPU 0
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* [P+32..P+63] PPIs for CPU 1
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* ...
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* + sysbus IRQs: (in order; number will vary depending on number of cores)
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* - IRQ for CPU 0
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* - IRQ for CPU 1
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* ...
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* - FIQ for CPU 0
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* - FIQ for CPU 1
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* ...
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* - VIRQ for CPU 0 (exists even if virt extensions not present)
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* - VIRQ for CPU 1 (exists even if virt extensions not present)
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* ...
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* - VFIQ for CPU 0 (exists even if virt extensions not present)
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* - VFIQ for CPU 1 (exists even if virt extensions not present)
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* ...
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* - maintenance IRQ for CPU i/f 0 (only if virt extensions present)
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* - maintenance IRQ for CPU i/f 1 (only if virt extensions present)
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* + sysbus MMIO regions: (in order; numbers will vary depending on
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* whether virtualization extensions are present and on number of cores)
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* - distributor registers (GICD*)
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* - CPU interface for the accessing core (GICC*)
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* - virtual interface control registers (GICH*) (only if virt extns present)
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* - virtual CPU interface for the accessing core (GICV*) (only if virt)
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* - CPU 0 CPU interface registers
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* - CPU 1 CPU interface registers
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* ...
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* - CPU 0 virtual interface control registers (only if virt extns present)
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* - CPU 1 virtual interface control registers (only if virt extns present)
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* ...
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*/
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#ifndef HW_ARM_GIC_H
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#define HW_ARM_GIC_H
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#include "arm_gic_common.h"
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/* Number of SGI target-list bits */
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#define GIC_TARGETLIST_BITS 8
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#define GIC_MAX_PRIORITY_BITS 8
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#define GIC_MIN_PRIORITY_BITS 4
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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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/*< private >*/
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ARMGICCommonClass parent_class;
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/*< public >*/
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DeviceRealize parent_realize;
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} ARMGICClass;
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#endif
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