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- /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2021-01-30 lizhirui first version
- * 2021-11-18 JasonHu add fpu member
- */
- #ifndef __STACK_H__
- #define __STACK_H__
- #include <rtthread.h>
- struct rt_hw_stack_frame
- {
- rt_ubase_t epc; /* epc - epc - program counter */
- rt_ubase_t ra; /* x1 - ra - return address for jumps */
- rt_ubase_t sstatus; /* - supervisor status register */
- rt_ubase_t gp; /* x3 - gp - global pointer */
- rt_ubase_t tp; /* x4 - tp - thread pointer */
- rt_ubase_t t0; /* x5 - t0 - temporary register 0 */
- rt_ubase_t t1; /* x6 - t1 - temporary register 1 */
- rt_ubase_t t2; /* x7 - t2 - temporary register 2 */
- rt_ubase_t s0_fp; /* x8 - s0/fp - saved register 0 or frame pointer */
- rt_ubase_t s1; /* x9 - s1 - saved register 1 */
- rt_ubase_t a0; /* x10 - a0 - return value or function argument 0 */
- rt_ubase_t a1; /* x11 - a1 - return value or function argument 1 */
- rt_ubase_t a2; /* x12 - a2 - function argument 2 */
- rt_ubase_t a3; /* x13 - a3 - function argument 3 */
- rt_ubase_t a4; /* x14 - a4 - function argument 4 */
- rt_ubase_t a5; /* x15 - a5 - function argument 5 */
- rt_ubase_t a6; /* x16 - a6 - function argument 6 */
- rt_ubase_t a7; /* x17 - s7 - function argument 7 */
- rt_ubase_t s2; /* x18 - s2 - saved register 2 */
- rt_ubase_t s3; /* x19 - s3 - saved register 3 */
- rt_ubase_t s4; /* x20 - s4 - saved register 4 */
- rt_ubase_t s5; /* x21 - s5 - saved register 5 */
- rt_ubase_t s6; /* x22 - s6 - saved register 6 */
- rt_ubase_t s7; /* x23 - s7 - saved register 7 */
- rt_ubase_t s8; /* x24 - s8 - saved register 8 */
- rt_ubase_t s9; /* x25 - s9 - saved register 9 */
- rt_ubase_t s10; /* x26 - s10 - saved register 10 */
- rt_ubase_t s11; /* x27 - s11 - saved register 11 */
- rt_ubase_t t3; /* x28 - t3 - temporary register 3 */
- rt_ubase_t t4; /* x29 - t4 - temporary register 4 */
- rt_ubase_t t5; /* x30 - t5 - temporary register 5 */
- rt_ubase_t t6; /* x31 - t6 - temporary register 6 */
- rt_ubase_t user_sp_exc_stack; /* sscratch - user mode sp/exception stack */
- #ifdef ENABLE_FPU
- rt_ubase_t f[CTX_FPU_REG_NR]; /* f0~f31 */
- #endif
- };
- #endif
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