boards/arm: add qemu-armv7r board

This adds support for qemu-armv7r board with flat mode sample
config for using with QEMU emulated Cortex-R5 processor.

Signed-off-by: Yanfeng Liu <p-liuyanfeng9@xiaomi.com>

boards/Kconfig

@@ -2222,6 +2222,14 @@ config ARCH_BOARD_QEMU_ARMV8A
 		This options selects support for NuttX on the QEMU ARMv8a + virt
 		board featuring the qemu ARMv8a CPUs.
 
+config ARCH_BOARD_QEMU_ARMV7R
+	bool "Qemu ARMv7r CPUs board"
+	depends on ARCH_CHIP_QEMU_ARM
+	select ARCH_HAVE_IRQBUTTONS
+	---help---
+		This selects support for NuttX on the QEMU ARMv7r + virt
+		board featuring the qemu ARMv7r CPUs.
+
 config ARCH_BOARD_PINEPHONE
 	bool "PINE64 PinePhone"
 	depends on ARCH_CHIP_A64
@@ -3515,6 +3523,7 @@ config ARCH_BOARD
 	default "sabre-6quad"               if ARCH_BOARD_SABRE_6QUAD
 	default "tc397"                     if ARCH_BOARD_TC397
 	default "qemu-armv7a"               if ARCH_BOARD_QEMU_ARMV7A
+	default "qemu-armv7r"               if ARCH_BOARD_QEMU_ARMV7R
 	default "qemu-armv8a"               if ARCH_BOARD_QEMU_ARMV8A
 	default "pinephone"                 if ARCH_BOARD_PINEPHONE
 	default "pinephonepro"              if ARCH_BOARD_PINEPHONE_PRO

boards/arm/qemu/qemu-armv7r/CMakeLists.txt

@@ -0,0 +1,25 @@
+# ##############################################################################
+# boards/arm/qemu/qemu-armv7r/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+
+set_property(GLOBAL PROPERTY LD_SCRIPT "${NUTTX_BOARD_DIR}/scripts/dramboot.ld")
+
+add_subdirectory(src)

boards/arm/qemu/qemu-armv7r/Kconfig

@@ -0,0 +1,7 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+if ARCH_BOARD_QEMU_ARMV7R
+endif

boards/arm/qemu/qemu-armv7r/configs/nsh/defconfig

@@ -0,0 +1,60 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+CONFIG_ALARM_ARCH=y
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="qemu-armv7r"
+CONFIG_ARCH_BOARD_QEMU_ARMV7R=y
+CONFIG_ARCH_CHIP="qemu"
+CONFIG_ARCH_CHIP_QEMU_ARM=y
+CONFIG_ARCH_CHIP_QEMU_CORTEXR5=y
+CONFIG_ARCH_INTERRUPTSTACK=2048
+CONFIG_ARCH_LOWVECTORS=y
+CONFIG_BOARDCTL_POWEROFF=y
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_ASSERTIONS=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_FULLOPT=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_DEFAULT_TASK_STACKSIZE=4096
+CONFIG_EXAMPLES_HELLO=y
+CONFIG_FLASH_SIZE=1048576
+CONFIG_FS_PROCFS=y
+CONFIG_FS_ROMFS=y
+CONFIG_HAVE_CXX=y
+CONFIG_HAVE_CXXINITIALIZE=y
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_READLINE=y
+CONFIG_ONESHOT=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=16777216
+CONFIG_RAM_START=0x40000000
+CONFIG_RAW_BINARY=y
+CONFIG_READLINE_CMD_HISTORY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_HPWORK=y
+CONFIG_SCHED_HPWORKPRIORITY=192
+CONFIG_STACK_COLORATION=y
+CONFIG_START_DAY=25
+CONFIG_START_YEAR=2025
+CONFIG_SYMTAB_ORDEREDBYNAME=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_SYSTEM_SYSTEM=y
+CONFIG_TESTING_GETPRIME=y
+CONFIG_TESTING_OSTEST=y
+CONFIG_UART1_BASE=0x9000000
+CONFIG_UART1_IRQ=33
+CONFIG_UART1_PL011=y
+CONFIG_UART1_SERIAL_CONSOLE=y
+CONFIG_UART_PL011=y
+CONFIG_USEC_PER_TICK=1000

boards/arm/qemu/qemu-armv7r/include/board.h

@@ -0,0 +1,61 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7r/include/board.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_QEMU_QEMU_ARMV7R_INCLUDE_BOARD_H
+#define __BOARDS_ARM_QEMU_QEMU_ARMV7R_INCLUDE_BOARD_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+#undef EXTERN
+#if defined(__cplusplus)
+#define EXTERN extern "C"
+extern "C"
+{
+#else
+#define EXTERN extern
+#endif
+
+/****************************************************************************
+ * Public Function Prototypes
+ ****************************************************************************/
+
+#undef EXTERN
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_ARM_QEMU_QEMU_ARMV7R_INCLUDE_BOARD_H */

boards/arm/qemu/qemu-armv7r/scripts/Make.defs

@@ -0,0 +1,42 @@
+############################################################################
+# boards/arm/qemu/qemu-armv7r/scripts/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/.config
+include $(TOPDIR)/tools/Config.mk
+include $(TOPDIR)/arch/arm/src/armv7-r/Toolchain.defs
+
+LDSCRIPT = dramboot.ld
+
+ARCHSCRIPT += $(BOARD_DIR)$(DELIM)scripts$(DELIM)$(LDSCRIPT)
+
+CFLAGS := $(ARCHCFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
+CXXFLAGS := $(ARCHCXXFLAGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
+CPPFLAGS := $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRAFLAGS)
+AFLAGS := $(CFLAGS) -D__ASSEMBLY__
+
+# NXFLAT module definitions
+
+NXFLATLDFLAGS1 = -r -d -warn-common
+NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)$(DELIM)binfmt$(DELIM)libnxflat$(DELIM)gnu-nxflat-pcrel.ld -no-check-sections
+LDNXFLATFLAGS = -e main -s 2048

boards/arm/qemu/qemu-armv7r/scripts/dramboot.ld

@@ -0,0 +1,138 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7a/scripts/dramboot.ld
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+OUTPUT_ARCH(arm)
+ENTRY(__start)
+
+MEMORY
+{
+  ROM (rx) : ORIGIN = CONFIG_FLASH_START, LENGTH = CONFIG_FLASH_SIZE
+  RAM (rwx): ORIGIN = CONFIG_RAM_START,   LENGTH = CONFIG_RAM_SIZE
+}
+
+SECTIONS
+{
+
+  /* where the global variable out-of-bounds detection information located */
+
+#ifdef CONFIG_MM_KASAN_GLOBAL
+  .kasan.unused : {
+    *(.data..LASANLOC*)
+  }
+  .kasan.global : {
+    KEEP (*(.data..LASAN0))
+    KEEP (*(.data.rel.local..LASAN0))
+  }
+  .kasan.shadows : {
+    *(.kasan.shadows)
+  }
+#endif
+
+  .text : {
+      _stext = .;            /* Text section */
+      __text_start = .;
+      *(.vectors)
+      *(.text*)
+      *(.fixup)
+      *(.gnu.warning)
+  } > ROM
+
+  . = ALIGN(4096);
+
+  .init_section : {
+      _sinit = ABSOLUTE(.);
+      KEEP(*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
+      KEEP(*(.init_array EXCLUDE_FILE(*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o) .ctors))
+      _einit = ABSOLUTE(.);
+      . = ALIGN(4096);
+      _etext = .; /* End_1 of .text */
+      _sztext = _etext - _stext;
+  } > ROM
+
+  .ARM.extab :
+  {
+      *(.ARM.extab*)
+  } > ROM
+
+  /* .ARM.exidx is sorted, so has to go in its own output section.  */
+
+  PROVIDE_HIDDEN (__exidx_start = .);
+  .ARM.exidx :
+  {
+      *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+  } > ROM
+  PROVIDE_HIDDEN (__exidx_end = .);
+
+  .rodata : {
+      _srodata = .;          /* Read-only data */
+      *(.rodata*)
+      *(.data.rel.ro*)
+      KEEP(*(SORT(.scattered_array*)));
+      . = ALIGN(4096);
+      _erodata = .;
+  } > ROM
+
+  _eronly = LOADADDR(.data);
+  .data : {                    /* Data */
+      _sdata = .;
+      *(.data*)
+      . = ALIGN(8);
+      __start_impls = .;
+      *(.impls)
+      KEEP(*(.impls))
+      . = ALIGN(4);
+      __stop_impls = .;
+      _edata = .;
+  } > RAM AT > ROM
+
+  .noinit : {
+      _snoinit = ABSOLUTE(.);
+      *(.noinit*)
+      _enoinit = ABSOLUTE(.);
+  } > RAM
+
+  .bss : {                     /* BSS */
+       _sbss = .;
+       *(.bss*)
+       . = ALIGN(4096);
+       _ebss = .;
+  } > RAM
+
+  /* Sections to be discarded */
+  /DISCARD/ : {
+       *(.exit.text)
+       *(.exit.data)
+       *(.exitcall.exit)
+  }
+
+  /* Stabs debugging sections.  */
+  .stab 0 : { *(.stab) }
+  .stabstr 0 : { *(.stabstr) }
+  .stab.excl 0 : { *(.stab.excl) }
+  .stab.exclstr 0 : { *(.stab.exclstr) }
+  .stab.index 0 : { *(.stab.index) }
+  .stab.indexstr 0 : { *(.stab.indexstr) }
+  .comment 0 : { *(.comment) }
+}
+

boards/arm/qemu/qemu-armv7r/src/CMakeLists.txt

@@ -0,0 +1,33 @@
+# ##############################################################################
+# boards/arm/qemu/qemu-armv7r/src/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more contributor
+# license agreements.  See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership.  The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may not
+# use this file except in compliance with the License.  You may obtain a copy of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+# ##############################################################################
+set(SRCS qemu_boardinit.c qemu_bringup.c)
+
+if(CONFIG_BOARDCTL)
+  list(APPEND SRCS qemu_appinit.c)
+endif()
+
+if(CONFIG_LIBC_FDT)
+  target_include_directories(board
+                             PRIVATE ${NUTTX_DIR}/libs/libc/fdt/dtc/libfdt)
+endif()
+
+target_sources(board PRIVATE ${SRCS})

boards/arm/qemu/qemu-armv7r/src/Makefile

@@ -0,0 +1,35 @@
+############################################################################
+# boards/arm/qemu/qemu-armv7r/src/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.  The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(TOPDIR)/Make.defs
+
+CSRCS = qemu_boardinit.c qemu_bringup.c
+
+ifeq ($(CONFIG_BOARDCTL),y)
+CSRCS += qemu_appinit.c
+endif
+
+ifeq ($(CONFIG_LIBC_FDT),y)
+CFLAGS += ${INCDIR_PREFIX}$(TOPDIR)$(DELIM)libs$(DELIM)libc$(DELIM)fdt$(DELIM)dtc$(DELIM)libfdt
+endif
+
+include $(TOPDIR)/boards/Board.mk

boards/arm/qemu/qemu-armv7r/src/qemu-armv7r.h

@@ -0,0 +1,61 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7r/src/qemu-armv7r.h
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __BOARDS_ARM_QEMU_QEMU_ARMV7R_SRC_QEMU_ARMV7R_H
+#define __BOARDS_ARM_QEMU_QEMU_ARMV7R_SRC_QEMU_ARMV7R_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+#ifndef __ASSEMBLY__
+
+/****************************************************************************
+ * Public Functions Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: qemu_bringup
+ *
+ * Description:
+ *   Bring up board features
+ *
+ ****************************************************************************/
+
+#if defined(CONFIG_BOARDCTL) || defined(CONFIG_BOARD_LATE_INITIALIZE)
+int qemu_bringup(void);
+#endif
+
+#endif /* __ASSEMBLY__ */
+#endif /* __BOARDS_ARM_QEMU_QEMU_ARMV7R_SRC_QEMU_ARMV7R_H */

boards/arm/qemu/qemu-armv7r/src/qemu_appinit.c

@@ -0,0 +1,75 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7r/src/qemu_appinit.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+#include <sys/types.h>
+#include <nuttx/board.h>
+#include "qemu-armv7r.h"
+
+#ifdef CONFIG_BOARDCTL
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: board_app_initialize
+ *
+ * Description:
+ *   Perform application specific initialization.  This function is never
+ *   called directly from application code, but only indirectly via the
+ *   (non-standard) boardctl() interface using the command BOARDIOC_INIT.
+ *
+ * Input Parameters:
+ *   arg - The boardctl() argument is passed to the board_app_initialize()
+ *         implementation without modification.  The argument has no
+ *         meaning to NuttX; the meaning of the argument is a contract
+ *         between the board-specific initialization logic and the
+ *         matching application logic.  The value could be such things as a
+ *         mode enumeration value, a set of DIP switch switch settings, a
+ *         pointer to configuration data read from a file or serial FLASH,
+ *         or whatever you would like to do with it.  Every implementation
+ *         should accept zero/NULL as a default configuration.
+ *
+ * Returned Value:
+ *   Zero (OK) is returned on success; a negated errno value is returned on
+ *   any failure to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+
+int board_app_initialize(uintptr_t arg)
+{
+  UNUSED(arg);
+#ifndef CONFIG_BOARD_LATE_INITIALIZE
+  /* Perform board initialization */
+
+  return qemu_bringup();
+#else
+  return OK;
+#endif
+}
+
+#endif /* CONFIG_BOARDCTL */

boards/arm/qemu/qemu-armv7r/src/qemu_boardinit.c

@@ -0,0 +1,127 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7r/src/qemu_boardinit.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/arch.h>
+#include <nuttx/config.h>
+#include <stdint.h>
+#include <nuttx/board.h>
+#include "qemu-armv7r.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: qemu_memory_initialize
+ *
+ * Description:
+ *   All qemu architectures must provide the following entry point.  This
+ *   entry point is called early in the initialization before memory has
+ *   been configured.  This board-specific function is responsible for
+ *   configuring any on-board memories.
+ *
+ *   Logic in qemu_memory_initialize must be careful to avoid using any
+ *   global variables because those will be uninitialized at the time this
+ *   function is called.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void qemu_memory_initialize(void)
+{
+  /* SDRAM was initialized by a bootloader in the supported configurations. */
+}
+
+/****************************************************************************
+ * Name: qemu_board_initialize
+ *
+ * Description:
+ *   All qemu architectures must provide the following entry point.  This
+ *   entry point is called in the initialization phase -- after
+ *   qemu_memory_initialize and after all memory has been configured and
+ *   mapped but before any devices have been initialized.
+ *
+ * Input Parameters:
+ *   None
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void qemu_board_initialize(void)
+{
+#ifdef CONFIG_ARCH_LEDS
+  /* Configure on-board LEDs if LED support has been selected. */
+
+#endif
+}
+
+/****************************************************************************
+ * Name: board_late_initialize
+ *
+ * Description:
+ *   If CONFIG_BOARD_LATE_INITIALIZE is selected, then an additional
+ *   initialization call will be performed in the boot-up sequence to a
+ *   function called board_late_initialize(). board_late_initialize() will be
+ *   called immediately after up_intitialize() is called and just before the
+ *   initial application is started.  This additional initialization phase
+ *   may be used, for example, to initialize board-specific device drivers.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_BOARD_LATE_INITIALIZE
+void board_late_initialize(void)
+{
+  /* Perform board initialization */
+
+  qemu_bringup();
+}
+#endif /* CONFIG_BOARD_LATE_INITIALIZE */
+
+#ifdef CONFIG_BOARDCTL_POWEROFF
+int board_power_off(int status)
+{
+  UNUSED(status);
+
+  /* TODO: find a solution */
+
+  return 0;
+}
+#endif

boards/arm/qemu/qemu-armv7r/src/qemu_bringup.c

@@ -0,0 +1,135 @@
+/****************************************************************************
+ * boards/arm/qemu/qemu-armv7r/src/qemu_bringup.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <syslog.h>
+
+#include <nuttx/fs/fs.h>
+#include <nuttx/fdt.h>
+
+#ifdef CONFIG_LIBC_FDT
+#  include <libfdt.h>
+#endif
+
+#include "chip.h"
+#include "qemu-armv7r.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#ifndef QEMU_SPI_IRQ_BASE
+#define QEMU_SPI_IRQ_BASE     32
+#endif
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+#if defined(CONFIG_LIBC_FDT) && defined(CONFIG_DEVICE_TREE)
+
+/****************************************************************************
+ * Name: register_devices_from_fdt
+ ****************************************************************************/
+
+static void register_devices_from_fdt(void)
+{
+  const void *fdt = fdt_get();
+  int ret;
+
+  if (fdt == NULL)
+    {
+      return;
+    }
+
+#ifdef CONFIG_DRIVERS_VIRTIO_MMIO
+  ret = fdt_virtio_mmio_devices_register(fdt, QEMU_SPI_IRQ_BASE);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "fdt_virtio_mmio_devices_register failed, ret=%d\n",
+             ret);
+    }
+#endif
+
+#ifdef CONFIG_PCI
+  ret = fdt_pci_ecam_register(fdt);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "fdt_pci_ecam_register failed, ret=%d\n", ret);
+    }
+#endif
+
+  UNUSED(ret);
+}
+
+#endif
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: imx_bringup
+ *
+ * Description:
+ *   Bring up board features
+ *
+ ****************************************************************************/
+
+int qemu_bringup(void)
+{
+  int ret;
+
+#ifdef CONFIG_FS_TMPFS
+  /* Mount the tmpfs file system */
+
+  ret = nx_mount(NULL, CONFIG_LIBC_TMPDIR, "tmpfs", 0, NULL);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: Failed to mount tmpfs at %s: %d\n",
+             CONFIG_LIBC_TMPDIR, ret);
+    }
+#endif
+
+#ifdef CONFIG_FS_PROCFS
+  /* Mount the procfs file system */
+
+  ret = nx_mount(NULL, "/proc", "procfs", 0, NULL);
+  if (ret < 0)
+    {
+      syslog(LOG_ERR, "ERROR: Failed to mount procfs at /proc: %d\n", ret);
+    }
+#endif
+
+#if defined(CONFIG_LIBC_FDT) && defined(CONFIG_DEVICE_TREE)
+  register_devices_from_fdt();
+#endif
+
+  UNUSED(ret);
+  return OK;
+}