diff --git a/include/drivers/irq/riscv_plic0.h b/include/drivers/irq/riscv_plic0.h index 4eec75c583..9f7c59a969 100644 --- a/include/drivers/irq/riscv_plic0.h +++ b/include/drivers/irq/riscv_plic0.h @@ -4,15 +4,18 @@ * * SPDX-License-Identifier: GPL-2.0-only * - * SiFive U54/U74 PLIC handling (HiFive Unleashed/Unmatched, Polarfire) + * SiFive U54/U74 PLIC handling (HiFive Unleashed/Unmatched, Polarfire, + * QEMU RISC-V virt) */ #pragma once /* This is a check that prevents using this driver blindly. Extend the list if * this driver is confirmed to be working on other platforms. */ -#if !defined(CONFIG_PLAT_HIFIVE) && !defined(CONFIG_PLAT_POLARFIRE) -#error "This code supports the SiFive U54/U74 PLIC only." +#if !defined(CONFIG_PLAT_HIFIVE) && \ + !defined(CONFIG_PLAT_POLARFIRE) && \ + !defined(CONFIG_PLAT_QEMU_RISCV_VIRT) +#error "Check if this platform suppots a PLIC." #endif /* tell the kernel we have the set trigger feature */ diff --git a/libsel4/sel4_plat_include/qemu-riscv-virt/sel4/plat/api/constants.h b/libsel4/sel4_plat_include/qemu-riscv-virt/sel4/plat/api/constants.h new file mode 100644 index 0000000000..dcd96cda63 --- /dev/null +++ b/libsel4/sel4_plat_include/qemu-riscv-virt/sel4/plat/api/constants.h @@ -0,0 +1,11 @@ +/* + * Copyright 2022, HENSOLDT Cyber + * + * SPDX-License-Identifier: BSD-2-Clause + */ + +#pragma once + +#include + +/* nothing here */ diff --git a/src/plat/qemu-riscv-virt/config.cmake b/src/plat/qemu-riscv-virt/config.cmake new file mode 100644 index 0000000000..7f52cec289 --- /dev/null +++ b/src/plat/qemu-riscv-virt/config.cmake @@ -0,0 +1,109 @@ +# +# Copyright 2022, HENSOLDT Cyber +# Copyright 2020, Data61, CSIRO (ABN 41 687 119 230) +# +# SPDX-License-Identifier: GPL-2.0-only +# + +cmake_minimum_required(VERSION 3.7.2) + +declare_platform(qemu-riscv-virt KernelPlatformQEMURiscVVirt PLAT_QEMU_RISCV_VIRT KernelArchRiscV) + +if(KernelPlatformQEMURiscVVirt) + + # ToDo: use setup_seL4_arch("riscv64;riscv32") + if("${KernelSel4Arch}" STREQUAL riscv64) + declare_seL4_arch(riscv64) + elseif("${KernelSel4Arch}" STREQUAL riscv32) + # This is still untested + declare_seL4_arch(riscv32) + else() + fallback_declare_seL4_arch_default(riscv64) + endif() + + config_set(KernelOpenSBIPlatform OPENSBI_PLATFORM "generic") + config_set(KernelPlatformFirstHartID FIRST_HART_ID 0) + + # Unless QEMU_DTS is set explicitly, the device tree is extract from QEMU. + # This keeps it nicely up to date with the newer QEMU versions and is quite + # convenient for the development usecase. + if(NOT DEFINED QEMU_DTS) + + message(STATUS "Extracting device tree from QEMU") + + set(QEMU_BINARY "qemu-system-${KernelSel4Arch}") + find_program(QEMU_BINARY ${QEMU_BINARY}) + + # RISC-V virtual platform works since QEMU 5.1.0 + set(MIN_QEMU_VERSION "5.1.0") + execute_process( + COMMAND ${QEMU_BINARY} -version + RESULT_VARIABLE error + OUTPUT_VARIABLE QEMU_STDOUT_MESSAGE + ) + if(error) + message(FATAL_ERROR "Failed to determine QEMU version (${QEMU_BINARY})") + endif() + string( + REGEX + MATCH + "[0-9](\\.[0-9])+" + QEMU_VERSION + "${QEMU_STDOUT_MESSAGE}" + ) + if("${QEMU_VERSION}" VERSION_LESS "${MIN_QEMU_VERSION}") + message( + FATAL_ERROR + "Error: need at least QEMU version ${MIN_QEMU_VERSION}, found '${QEMU_VERSION}'" + ) + endif() + + if(NOT DEFINED QEMU_MEMORY) + # Having 2 GiB of memory as default seems a good trade-off. It's + # sufficient for test/demo systems, but still something the host can + # provide without running short on resources. + set(QEMU_MEMORY "2048") + endif() + + if(KernelMaxNumNodes) + set(QEMU_SMP_OPTION "${KernelMaxNumNodes}") + else() + set(QEMU_SMP_OPTION "1") + endif() + + set(QEMU_DT_BASE_NAME "${CMAKE_BINARY_DIR}/qemu-riscv-virt") + set(QEMU_DTB "${QEMU_DT_BASE_NAME}.dtb") + set(QEMU_DTS "${QEMU_DT_BASE_NAME}.dts") + + execute_process( + COMMAND + ${QEMU_BINARY} -machine virt,dumpdtb=${QEMU_DTB} -cpu rv${KernelWordSize} -smp + ${QEMU_SMP_OPTION} -m ${QEMU_MEMORY} -nographic + RESULT_VARIABLE error + ) + if(error) + message(FATAL_ERROR "Failed to dump DTB using ${QEMU_BINARY})") + endif() + + execute_process( + COMMAND + dtc -q -I dtb -O dts -o ${QEMU_DTS} ${QEMU_DTB} + RESULT_VARIABLE error + ) + if(error) + message(FATAL_ERROR "Failed to convert QEMU's DTB to a DTS (${QEMU_DTB})") + endif() + + endif() + + list(APPEND KernelDTSList "${QEMU_DTS}" "${CMAKE_CURRENT_LIST_DIR}/overlay-qemu-riscv-virt.dts") + + # QEMU pretends to have a CLINT/ACLINT timer with 10 MHz, but this may not + # hold in practical mesurements. A SiFive PLIC/CLINT with 127 interrupt + # sources is emulated by default. + declare_default_headers( + TIMER_FREQUENCY 10000000 PLIC_MAX_NUM_INT 128 + INTERRUPT_CONTROLLER drivers/irq/riscv_plic0.h + ) + +endif() diff --git a/src/plat/qemu-riscv-virt/overlay-qemu-riscv-virt.dts b/src/plat/qemu-riscv-virt/overlay-qemu-riscv-virt.dts new file mode 100644 index 0000000000..36f930b6f5 --- /dev/null +++ b/src/plat/qemu-riscv-virt/overlay-qemu-riscv-virt.dts @@ -0,0 +1,20 @@ +/* + * Copyright 2022, HENSOLDT Cyber + * + * SPDX-License-Identifier: GPL-2.0-only + */ + +/ { + chosen { + /* + * - elfloader and kernel use SBI console by default + * - QEMU emulates a SiFive PLIC and CLINT by default + * + * Nothing needed for elfloader + * seL4,elfloader-devices = ... ; + * + */ + seL4,kernel-devices = + &{/soc/plic@c000000}; + }; +};