diff --git a/include/uthread.h b/include/uthread.h
new file mode 100644
index 00000000000..f1f86d210d5
--- /dev/null
+++ b/include/uthread.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2025 Linaro Limited
+ */
+
+#include <linux/types.h>
+
+#ifndef _UTHREAD_H_
+#define _UTHREAD_H_
+
+#ifdef CONFIG_UTHREAD
+
+int uthread_create(void (*fn)(void *), void *arg, size_t stack_sz,
+		   unsigned int grp_id);
+bool uthread_schedule(void);
+unsigned int uthread_grp_new_id(void);
+bool uthread_grp_done(unsigned int grp_id);
+
+#else
+
+static inline int uthread_create(void (*fn)(void *), void *arg, size_t stack_sz,
+				 unsigned int grp_id)
+{
+	fn(arg);
+	return 0;
+}
+
+static inline bool uthread_schedule(void)
+{
+	return false;
+}
+
+static inline unsigned int uthread_grp_new_id(void)
+{
+	return 0;
+}
+
+static inline bool uthread_grp_done(unsigned int grp_id)
+{
+	return true;
+}
+
+#endif /* CONFIG_UTHREAD */
+#endif /* _UTHREAD_H_ */
diff --git a/lib/Kconfig b/lib/Kconfig
index 1a683dea670..b32740ecbcc 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -1255,6 +1255,27 @@ config PHANDLE_CHECK_SEQ
 	  enable this config option to distinguish them using
 	  phandles in fdtdec_get_alias_seq() function.
 
+config UTHREAD
+	bool "Enable thread support"
+	depends on HAVE_INITJMP
+	help
+	  Implement a simple form of cooperative multi-tasking based on
+	  context-switching via initjmp(), setjmp() and longjmp(). The
+	  uthread_ interface enables the main thread of execution to create
+	  one or more secondary threads and schedule them until they all have
+	  returned. At any point a thread may suspend its execution and
+	  schedule another thread, which allows for the efficient multiplexing
+	  of leghthy operations.
+
+config UTHREAD_STACK_SIZE
+	int "Default uthread stack size"
+	depends on UTHREAD
+	default 32768
+	help
+	  The default stak size for uthreads. Each uthread has its own stack.
+	  When the stack_sz argument to uthread_create() is zero then this
+	  value is used.
+
 endmenu
 
 source "lib/fwu_updates/Kconfig"
diff --git a/lib/Makefile b/lib/Makefile
index a7bc2f3134a..3610694de7a 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -164,6 +164,8 @@ obj-$(CONFIG_LIB_ELF) += elf.o
 
 obj-$(CONFIG_$(PHASE_)SEMIHOSTING) += semihosting.o
 
+obj-$(CONFIG_UTHREAD) += uthread.o
+
 #
 # Build a fast OID lookup registry from include/linux/oid_registry.h
 #
diff --git a/lib/uthread.c b/lib/uthread.c
new file mode 100644
index 00000000000..430d1c0de32
--- /dev/null
+++ b/lib/uthread.c
@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2021 Ahmad Fatoum, Pengutronix
+ * Copyright (C) 2025 Linaro Limited
+ *
+ * An implementation of cooperative multi-tasking inspired from barebox threads
+ * https://github.com/barebox/barebox/blob/master/common/bthread.c
+ */
+
+#include <compiler.h>
+#include <asm/setjmp.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <malloc.h>
+#include <stdint.h>
+#include <uthread.h>
+
+static struct uthread {
+	void (*fn)(void *);
+	void *arg;
+	jmp_buf ctx;
+	void *stack;
+	bool done;
+	unsigned int grp_id;
+	struct list_head list;
+} main_thread = {
+	.list = LIST_HEAD_INIT(main_thread.list),
+};
+
+static struct uthread *current = &main_thread;
+
+/**
+ * uthread_trampoline() - Call the current thread's entry point then resume the
+ * main thread.
+ *
+ * This is a helper function which is used as the @func argument to the inijmp()
+ * function, and ultimately invoked via setjmp(). It does not return, but
+ * instead longjmp()'s back to the main thread.
+ */
+static void __noreturn uthread_trampoline(void)
+{
+	struct uthread *curr = current;
+
+	curr->fn(curr->arg);
+	curr->done = true;
+	current = &main_thread;
+	longjmp(current->ctx, 1);
+	/* Not reached */
+	while (true)
+		;
+}
+
+/**
+ * uthread_free() - Free memory used by a uthread object.
+ */
+static void uthread_free(struct uthread *uthread)
+{
+	if (!uthread)
+		return;
+	free(uthread->stack);
+	free(uthread);
+}
+
+/**
+ * uthread_create() - Create a uthread object and make it ready for execution
+ *
+ * Threads are automatically deleted when then return from their entry point.
+ *
+ * @fn: the thread's entry point
+ * @arg: argument passed to the thread's entry point
+ * @stack_sz: stack size for the new thread (in bytes). The stack is allocated
+ * on the heap.
+ * @grp_id: an optional thread group ID that the new thread should belong to
+ * (zero for no group)
+ */
+int uthread_create(void (*fn)(void *), void *arg, size_t stack_sz,
+		   unsigned int grp_id)
+{
+	struct uthread *uthread;
+
+	if (!stack_sz)
+		stack_sz = CONFIG_UTHREAD_STACK_SIZE;
+
+	uthread = calloc(1, sizeof(*uthread));
+	if (!uthread)
+		return -1;
+
+	uthread->stack = memalign(16, stack_sz);
+	if (!uthread->stack)
+		goto err;
+
+	uthread->fn = fn;
+	uthread->arg = arg;
+	uthread->grp_id = grp_id;
+
+	list_add_tail(&uthread->list, &current->list);
+
+	initjmp(uthread->ctx, uthread_trampoline, uthread->stack + stack_sz);
+
+	return 0;
+err:
+	uthread_free(uthread);
+	return -1;
+}
+
+/**
+ * uthread_resume() - switch execution to a given thread
+ *
+ * @uthread: the thread object that should be resumed
+ */
+static void uthread_resume(struct uthread *uthread)
+{
+	if (!setjmp(current->ctx)) {
+		current = uthread;
+		longjmp(uthread->ctx, 1);
+	}
+}
+
+/**
+ * uthread_schedule() - yield the CPU to the next runnable thread
+ *
+ * This function is called either by the main thread or any secondary thread
+ * (that is, any thread created via uthread_create()) to switch execution to
+ * the next runnable thread.
+ *
+ * Return: true if a thread was scheduled, false if no runnable thread was found
+ */
+bool uthread_schedule(void)
+{
+	struct uthread *next;
+	struct uthread *tmp;
+
+	if (list_empty(&current->list))
+	    return false;
+
+	list_for_each_entry_safe(next, tmp, &current->list, list) {
+		if (!next->done) {
+			uthread_resume(next);
+			return true;
+		} else {
+			/* Found a 'done' thread, free its resources */
+			list_del(&next->list);
+			uthread_free(next);
+		}
+	}
+	return false;
+}
+
+/**
+ * uthread_grp_new_id() - return a new ID for a thread group
+ *
+ * Return: the new thread group ID
+ */
+unsigned int uthread_grp_new_id(void)
+{
+	static unsigned int id = 0;
+
+	return ++id;
+}
+
+/**
+ * uthread_grp_done() - test if all threads in a group are done
+ *
+ * @grp: the ID of the thread group that should be considered
+ * Return: false if the group contains at least one runnable thread (i.e., one
+ * thread which entry point has not returned yet), true otherwise
+ */
+bool uthread_grp_done(unsigned int grp_id)
+{
+	struct uthread *next;
+
+	list_for_each_entry(next, &main_thread.list, list) {
+		if (next->grp_id == grp_id && !next->done)
+			return false;
+	}
+
+	return true;
+}
