6aba739f05
Currently NuttX on Arm64 supports Generic Interrupt Controller (GIC) Versions 3 and 4: [`arm64_gicv3.c`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm64/src/common/arm64_gicv3.c), [`arm64_gic.h`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm64/src/common/arm64_gic.h). This PR adds support for GIC Version 2, which is needed by [Pine64 PinePhone](https://lupyuen.github.io/articles/interrupt) based on Allwinner A64 SoC. This 64-bit implementation of GIC v2 is mostly identical to the existing GIC v2 for 32-bit Armv7-A ([`armv7-a/arm_gicv2.c`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv7-a/arm_gicv2.c), [`armv7-a/gic.h`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv7-a/gic.h)), with minor modifications to support 64-bit Registers (Interrupt Context). - `arch/arm64/Kconfig`: Under "ARM64 Options", we added an integer option `ARM_GIC_VERSION` ("GIC version") that selects the GIC Version. Valid values are 2, 3 and 4, default is 3. - `arch/arm64/src/common/arm64_gicv2.c`: Implements 64-bit GIC v2 based on 32-bit [`armv7-a/arm_gicv2.c`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv7-a/arm_gicv2.c) and [`armv7-a/gic.h`](https://github.com/apache/incubator-nuttx/blob/master/arch/arm/src/armv7-a/gic.h), modified to support 64-bit Registers (Interrupt Context). Function and Macro Names have not been changed, for easier cross-referencing between the 32-bit and 64-bit implementations of GIC v2. - `arch/arm64/src/common/arm64_gicv3.c`: Added Conditional Compilation for GIC v3. This file will not be compiled if `ARM_GIC_VERSION` is 2. - `arch/arm64/src/common/arm64_gic.h`: Added the Version Identifier for GIC v2. At startup we read the GIC Version from hardware and verify that it matches `ARM_GIC_VERSION`. - `arch/arm64/include/qemu/chip.h`: Added the QEMU Base Addresses for GIC v2. - `arch/arm64/src/common/Make.defs`: Added the source file that implements GIC v2. - `boards/arm64/qemu/qemu-armv8a/README.txt`: Added the documentation for testing GIC v2 with QEMU. - `boards/arm64/qemu/qemu-armv8a/configs/nsh_gicv2/defconfig`: Added the Board Configuration `qemu-armv8a:nsh_gicv2` for testing GIC v2 with QEMU. Identical to `qemu-armv8a:nsh`, except that `ARM_GIC_VERSION` is 2.
65 lines
2.1 KiB
C
65 lines
2.1 KiB
C
/****************************************************************************
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* arch/arm64/include/qemu/chip.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM64_INCLUDE_QEMU_CHIP_H
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#define __ARCH_ARM64_INCLUDE_QEMU_CHIP_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/* Number of bytes in @p x kibibytes/mebibytes/gibibytes */
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#define KB(x) ((x) << 10)
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#define MB(x) (KB(x) << 10)
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#define GB(x) (MB(UINT64_C(x)) << 10)
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#if defined(CONFIG_ARCH_CHIP_QEMU)
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#if CONFIG_ARM_GIC_VERSION == 2
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#define CONFIG_GICD_BASE 0x8000000
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#define CONFIG_GICR_BASE 0x8010000
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#elif CONFIG_ARM_GIC_VERSION == 3 || CONFIG_ARM_GIC_VERSION == 4
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#define CONFIG_GICD_BASE 0x8000000
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#define CONFIG_GICR_BASE 0x80a0000
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#else
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#error CONFIG_ARM_GIC_VERSION should be 2, 3 or 4
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#endif /* CONFIG_ARM_GIC_VERSION */
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#define CONFIG_RAMBANK1_ADDR 0x40000000
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#define CONFIG_RAMBANK1_SIZE MB(128)
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#define CONFIG_DEVICEIO_BASEADDR 0x7000000
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#define CONFIG_DEVICEIO_SIZE MB(512)
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#define CONFIG_LOAD_BASE 0x40280000
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#endif
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#endif /* __ARCH_ARM64_INCLUDE_QEMU_CHIP_H */
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