os/drivers/cpu, apps/system: Add CPU driver interface and test app

apps/system/cpucontrol/Kconfig

@@ -0,0 +1,13 @@
+#
+# For a description of the syntax of this configuration file,
+# see kconfig-language at https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt
+#
+
+config SYSTEM_CPUCONTROL
+	bool "CPU Control commands"
+	default n
+	depends on SMP
+	---help---
+		Enable support for CPU control commands in TASH. This provides commands
+		for managing CPU power management and status functionality on multi-core
+		systems. Commands include cpu1on, cpu1off, cpustatus.

apps/system/cpucontrol/Make.defs

@@ -0,0 +1,23 @@
+###########################################################################
+#
+# Copyright 2025 Samsung Electronics All Rights Reserved.
+#
+# Licensed 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.
+#
+###########################################################################
+
+
+ifeq ($(CONFIG_SYSTEM_CPUCONTROL),y)
+CONFIGURED_APPS += system/cpucontrol
+endif

apps/system/cpucontrol/Makefile

@@ -0,0 +1,102 @@
+############################################################################
+#
+# Copyright (c) 2025 Samsung Electronics Co., Ltd All Rights Reserved.
+#
+# Licensed 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)/Make.defs
+include $(APPDIR)/Make.defs
+
+ifeq ($(WINTOOL),y)
+INCDIROPT = -w
+endif
+
+# CPU Control System Utility
+
+ASRCS =
+CSRCS =
+MAINSRC = cpucontrol.c
+
+AOBJS = $(ASRCS:.S=$(OBJEXT))
+COBJS = $(CSRCS:.c=$(OBJEXT))
+MAINOBJ = $(MAINSRC:.c=$(OBJEXT))
+
+SRCS = $(ASRCS) $(CSRCS) $(MAINSRC)
+OBJS = $(AOBJS) $(COBJS)
+
+ifneq ($(CONFIG_BUILD_KERNEL),y)
+  OBJS += $(MAINOBJ)
+endif
+
+ifeq ($(CONFIG_WINDOWS_NATIVE),y)
+  BIN = ..\..\libapps$(LIBEXT)
+else
+ifeq ($(WINTOOL),y)
+  BIN = ..\\..\\libapps$(LIBEXT)
+else
+  BIN = ../../libapps$(LIBEXT)
+endif
+endif
+
+ifeq ($(WINTOOL),y)
+  INSTALL_DIR = "${shell cygpath -w $(BIN_DIR)}"
+else
+  INSTALL_DIR = $(BIN_DIR)
+endif
+
+ROOTDEPPATH = --dep-path .
+
+# Common build
+
+VPATH =
+
+all: .built
+.PHONY: context depend clean distclean
+
+$(AOBJS): %$(OBJEXT): %.S
+	$(call ASSEMBLE, $<, $@)
+
+$(COBJS) $(MAINOBJ): %$(OBJEXT): %.c
+	$(call COMPILE, $<, $@)
+
+.built: $(OBJS)
+	$(call ARCHIVE, $(BIN), $(OBJS))
+	$(Q) touch .built
+
+install:
+
+context:
+
+# Create dependencies
+
+.depend: Makefile $(SRCS)
+	$(Q) $(MKDEP) $(ROOTDEPPATH) "$(CC)" -- $(CFLAGS) -- $(SRCS) >Make.dep
+	$(Q) touch $@
+
+depend: .depend
+
+clean:
+	$(call DELFILE, .built)
+	$(call CLEAN)
+
+distclean: clean
+	$(call DELFILE, Make.dep)
+	$(call DELFILE, .depend)
+
+-include Make.dep
+.PHONY: preconfig
+preconfig:

apps/system/cpucontrol/cpucontrol.c

@@ -0,0 +1,225 @@
+/****************************************************************************
+ *
+ * Copyright 2025 Samsung Electronics All Rights Reserved.
+ *
+ * Licensed 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 <tinyara/config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <errno.h>
+#include <unistd.h>
+#include <tinyara/cpu_driver.h>
+#include <apps/shell/tash.h>
+
+/****************************************************************************
+ * Preprocessor Definitions
+ ****************************************************************************/
+
+const char *cpu_states[] = {
+	"running",		//0
+	"stop",			//1
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+
+static int cpucontrol_cpu_on(int argc, char *argv[]);
+static int cpucontrol_cpu_off(int argc, char *argv[]);
+static int cpucontrol_cpu_status(int argc, char *argv[]);
+static int cpucontrol_help(int argc, char *argv[]);
+static int cpucontrol_main(int argc, char *argv[]);
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int cpucontrol_cpu_on(int argc, char *argv[])
+{
+	int fd, state, cpu_num;
+	char devname[16];
+
+	if (argc < 3) {
+		printf("Usage: cpuctrl on <cpu_id>\n");
+		printf("Example: cpuctrl on 1\n");
+		return -EINVAL;
+	}
+
+	cpu_num = atoi(argv[2]);
+	if (cpu_num <= 0 || cpu_num >= CONFIG_SMP_NCPUS) {
+		printf("Invalid CPU ID %d. Valid range: 1-%d\n", cpu_num, CONFIG_SMP_NCPUS - 1);
+		return -EINVAL;
+	}
+
+	if (sched_getcpu() > 0) {
+		printf("can only powerup cpu%d from cpu0!\n", cpu_num);
+		return -EPERM;
+	}
+
+	printf("powering up cpu%d!\n", cpu_num);
+
+	snprintf(devname, sizeof(devname), "/dev/cpu%d", cpu_num);
+	fd = open(devname, O_RDWR);
+	if (fd < 0) {
+		printf("Cannot open %s: errno = %d\n", devname, get_errno());
+		return -get_errno();
+	}
+
+	if (ioctl(fd, IOC_CPU_ENABLE, 1) < 0) {
+		printf("IOC_CPU_ENABLE ioctl failed for %s : errno =  %d\n", devname, get_errno());
+		close(fd);
+		return -get_errno();
+	}
+	printf("cpu%d successfully enabled\n", cpu_num);
+
+	if (ioctl(fd, IOC_CPU_GET_STATE, &state) < 0) {
+		printf("IOC_CPU_GET_STATE ioctl failed for %s : errno = %d\n", devname, get_errno());
+		close(fd);
+		return -get_errno();
+	}
+
+	printf("state: %d (%s)\n", state, cpu_states[state]);
+	close(fd);
+	return 0;
+}
+
+static int cpucontrol_cpu_off(int argc, char *argv[])
+{
+	int fd, state, cpu_num;
+	char devname[16];
+
+	if (argc < 3) {
+		printf("Usage: cpuctrl off <cpu_id>\n");
+		printf("Example: cpuctrl off 1\n");
+		return -EINVAL;
+	}
+
+	cpu_num = atoi(argv[2]);
+	if (cpu_num <= 0 || cpu_num >= CONFIG_SMP_NCPUS) {
+		printf("Invalid CPU ID %d. Valid range: 1-%d\n", cpu_num, CONFIG_SMP_NCPUS - 1);
+		return -EINVAL;
+	}
+
+	if (sched_getcpu() > 0) {
+		printf("can only powerdown cpu%d from cpu0!\n", cpu_num);
+		return -EPERM;
+	}
+
+	printf("powering down cpu%d!\n", cpu_num);
+
+	snprintf(devname, sizeof(devname), "/dev/cpu%d", cpu_num);
+	fd = open(devname, O_RDWR);
+	if (fd < 0) {
+		printf("Cannot open %s: errno = %d\n", devname, get_errno());
+		return -get_errno();
+	}
+
+	if (ioctl(fd, IOC_CPU_DISABLE, 1) < 0) {
+		printf("IOC_CPU_DISABLE ioctl failed for %s : errno =  %d\n", devname, get_errno());
+		close(fd);
+		return -get_errno();
+	}
+	printf("cpu%d successfully disabled\n", cpu_num);
+
+	if (ioctl(fd, IOC_CPU_GET_STATE, &state) < 0) {
+		printf("IOC_CPU_GET_STATE ioctl failed for %s : errno = %d\n", devname, get_errno());
+		close(fd);
+		return -get_errno();
+	}
+	printf("state: %d (%s)\n", state, cpu_states[state]);
+	close(fd);
+	return 0;
+}
+
+static int cpucontrol_cpu_status(int argc, char *argv[])
+{
+	int fd, state;
+	char devname[16];
+
+	for (u8 i = 1; i < CONFIG_SMP_NCPUS; i++) {
+		snprintf(devname, sizeof(devname), "/dev/cpu%d", i);
+
+		fd = open(devname, O_RDWR);
+		if (fd < 0) {
+			printf("Cannot open %s: errno = %d\n", devname, get_errno());
+			continue;
+		}
+
+		if (ioctl(fd, IOC_CPU_GET_STATE, &state) < 0) {
+			printf("IOC_CPU_GET_STATE ioctl failed for %s : errno = %d\n", devname, get_errno());
+			close(fd);
+			continue;
+		}
+
+		printf("cpu state for cpu%d: %d (%s)\n", i, state, cpu_states[state]);
+		close(fd);
+	}
+	return 0;
+}
+
+static int cpucontrol_help(int argc, char *argv[])
+{
+	printf("CPU Control Commands:\n");
+	printf("  cpuctrl on <cpu_id>   - Power on specified CPU\n");
+	printf("  cpuctrl off <cpu_id>  - Power off specified CPU\n");
+	printf("  cpuctrl status        - Show status of all secondary CPUs\n");
+	printf("  cpuctrl help          - Show this help message\n");
+	printf("\nExamples:\n");
+	printf("  cpuctrl on 1          - Power on CPU1\n");
+	printf("  cpuctrl off 1         - Power off CPU1\n");
+	printf("  cpuctrl status        - Show all CPU states\n");
+	printf("\nNote: CPU control operations can only be performed from CPU0\n");
+	return 0;
+}
+
+static int cpucontrol_main(int argc, char *argv[])
+{
+	if (argc < 2) {
+		return cpucontrol_help(argc, argv);
+	}
+
+	if (strcmp(argv[1], "on") == 0) {
+		return cpucontrol_cpu_on(argc, argv);
+	} else if (strcmp(argv[1], "off") == 0) {
+		return cpucontrol_cpu_off(argc, argv);
+	} else if (strcmp(argv[1], "help") == 0) {
+		return cpucontrol_help(argc, argv);
+	} else if (strcmp(argv[1], "status") == 0) {
+		return cpucontrol_cpu_status(argc, argv);
+	} else {
+		printf("Unknown subcommand: %s\n", argv[1]);
+		return cpucontrol_help(argc, argv);
+	}
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void cpucontrol_register_cmds(void)
+{
+	/* Register the CPU control command during system initialization */
+	tash_cmd_install("cpuctrl", cpucontrol_main, TASH_EXECMD_ASYNC);
+}

apps/system/init/init.c

@@ -73,6 +73,10 @@
 extern void iotjs_register_cmds(void);
 #endif
 
+#ifdef CONFIG_SYSTEM_CPUCONTROL
+extern void cpucontrol_register_cmds(void);
+#endif
+
 /****************************************************************************
  * Pravite Functions
  ****************************************************************************/
@@ -107,6 +111,10 @@ static void tash_register_cmds(void)
 #ifdef CONFIG_DEBUG_SYSTEM_APP
 	sysdbgapp_init();
 #endif
+
+#ifdef CONFIG_SYSTEM_CPUCONTROL
+	cpucontrol_register_cmds();
+#endif
 }
 #endif							/* CONFIG_TASH */
 

build/configs/rtl8730e/flat_dev_ddr/defconfig

@@ -570,6 +570,8 @@ CONFIG_AUDIO_KEYWORD_DETECT=y
 # LCD Driver Support
 #
 # CONFIG_LCD is not set
+CONFIG_CPU_DRIVER=y
+CONFIG_SYSTEM_CPUCONTROL=y
 CONFIG_BCH=y
 CONFIG_RTC=y
 # CONFIG_RTC_DATETIME is not set