Zephyr Project API 3.7.0
A Scalable Open Source RTOS
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thread_stack.h
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1/*
2 * Copyright (c) 2022 Intel Corporation
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7#ifndef ZEPHYR_INCLUDE_ARCH_XTENSA_THREAD_STACK_H_
8#define ZEPHYR_INCLUDE_ARCH_XTENSA_THREAD_STACK_H_
9
10#include <xtensa/config/core-isa.h>
11#include <zephyr/toolchain.h>
12#include <zephyr/sys/util.h>
13
14#ifdef CONFIG_KERNEL_COHERENCE
15#define ARCH_STACK_PTR_ALIGN XCHAL_DCACHE_LINESIZE
16#else
17#define ARCH_STACK_PTR_ALIGN 16
18#endif
19
20
21#ifdef CONFIG_USERSPACE
22#ifdef CONFIG_XTENSA_MMU
23#define XTENSA_STACK_BASE_ALIGN CONFIG_MMU_PAGE_SIZE
24#define XTENSA_STACK_SIZE_ALIGN CONFIG_MMU_PAGE_SIZE
25#endif
26#ifdef CONFIG_XTENSA_MPU
27#define XTENSA_STACK_BASE_ALIGN XCHAL_MPU_ALIGN
28#define XTENSA_STACK_SIZE_ALIGN XCHAL_MPU_ALIGN
29#endif
30#else
31#define XTENSA_STACK_BASE_ALIGN ARCH_STACK_PTR_ALIGN
32#define XTENSA_STACK_SIZE_ALIGN ARCH_STACK_PTR_ALIGN
33#endif
34
35/*
36 *
37 * High memory addresses
38 *
39 * +-------------------+ <- thread.stack_info.start + thread.stack_info.size
40 * | TLS |
41 * +-------------------+ <- initial sp (computable with thread.stack_info.delta)
42 * | |
43 * | Thread stack |
44 * | |
45 * +-------------------+ <- thread.stack_info.start
46 * | Privileged stack | } CONFIG_MMU_PAGE_SIZE
47 * +-------------------+ <- thread.stack_obj
48 *
49 * Low Memory addresses
50 */
51
52#ifndef _ASMLANGUAGE
53
54/* thread stack */
56#if defined(CONFIG_XTENSA_MMU) || defined(CONFIG_XTENSA_MPU)
57 char privilege_stack[CONFIG_PRIVILEGED_STACK_SIZE];
58#endif /* CONFIG_XTENSA_MPU */
59} __packed __aligned(XTENSA_STACK_BASE_ALIGN);
60
61#if defined(CONFIG_XTENSA_MMU) || defined(CONFIG_XTENSA_MPU)
62#define ARCH_THREAD_STACK_RESERVED \
63 sizeof(struct xtensa_thread_stack_header)
64#endif /* CONFIG_XTENSA_MMU || CONFIG_XTENSA_MPU */
65
66#define ARCH_THREAD_STACK_OBJ_ALIGN(size) XTENSA_STACK_BASE_ALIGN
67#define ARCH_THREAD_STACK_SIZE_ADJUST(size) \
68 ROUND_UP((size), XTENSA_STACK_SIZE_ALIGN)
69
70/* kernel stack */
71#define ARCH_KERNEL_STACK_RESERVED 0
72#define ARCH_KERNEL_STACK_OBJ_ALIGN ARCH_STACK_PTR_ALIGN
73
74#endif /* _ASMLANGUAGE */
75
76#endif
Definition thread_stack.h:55
Macros to abstract toolchain specific capabilities.
Misc utilities.