/*
 * Copyright 2017, Data61
 * Commonwealth Scientific and Industrial Research Organisation (CSIRO)
 * ABN 41 687 119 230.
 *
 * This software may be distributed and modified according to the terms of
 * the BSD 2-Clause license. Note that NO WARRANTY is provided.
 * See "LICENSE_BSD2.txt" for details.
 *
 * @TAG(DATA61_BSD)
 */

#pragma once

#include <utils/arch/stack.h>
#include <utils/arith.h>

#define STACK_CALL_ALIGNMENT_BITS LOG_BASE_2(STACK_CALL_ALIGNMENT)

/**
 * Switch to a new stack and start running func on it.
 * If func returns, you will be back on the old stack.
 *
 * @param stack_top top of previously allocated stack.
 * @param func to jump to with the new stack.
 * @param arg to pass to new function.
 * @ret   the return value of func.
 */
void *utils_run_on_stack(void *stack_top, void * (*func)(void *arg), void *arg);