1 /* 2 * Copyright (c) 2021 Intel Corporation 3 * 4 * SPDX-License-Identifier: Apache-2.0 5 */ 6 7 #ifndef ZEPHYR_INCLUDE_ARCH_XTENSA_THREAD_H_ 8 #define ZEPHYR_INCLUDE_ARCH_XTENSA_THREAD_H_ 9 10 #include <stdint.h> 11 #ifndef _ASMLANGUAGE 12 13 #ifdef CONFIG_XTENSA_MPU 14 #include <zephyr/arch/xtensa/mpu.h> 15 #endif 16 17 #ifdef CONFIG_XTENSA_LAZY_HIFI_SHARING 18 #include <xtensa/config/tie.h> 19 #endif 20 21 /* Xtensa doesn't use these structs, but Zephyr core requires they be 22 * defined so they can be included in struct _thread_base. Dummy 23 * field exists for sizeof compatibility with C++. 24 */ 25 26 struct _callee_saved { 27 char dummy; 28 }; 29 30 typedef struct _callee_saved _callee_saved_t; 31 32 struct _thread_arch { 33 uint32_t last_cpu; 34 #ifdef CONFIG_USERSPACE 35 36 #ifdef CONFIG_XTENSA_MMU 37 uint32_t *ptables; 38 #endif 39 40 #ifdef CONFIG_XTENSA_MPU 41 /* Pointer to the memory domain's MPU map. */ 42 struct xtensa_mpu_map *mpu_map; 43 #endif 44 45 /* Initial privilege mode stack pointer when doing a system call. 46 * Un-set for surpervisor threads. 47 */ 48 uint8_t *psp; 49 50 /* Stashed PS value used to restore PS when restoring from 51 * context switching or returning from non-nested interrupts. 52 */ 53 uint32_t return_ps; 54 #endif 55 56 #ifdef CONFIG_XTENSA_LAZY_HIFI_SHARING 57 /* A non-BSA region is required for lazy save/restore */ 58 uint8_t hifi_regs[XCHAL_CP1_SA_SIZE] __aligned(XCHAL_CP1_SA_ALIGN); 59 #endif 60 }; 61 62 typedef struct _thread_arch _thread_arch_t; 63 64 #endif /* _ASMLANGUAGE */ 65 66 #endif /* ZEPHYR_INCLUDE_ARCH_XTENSA_THREAD_H_ */ 67
