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arch/tricore: Support setjmp and longjmp.

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Add setjmp/longjmp support for TriCore architecture using iLLD
intrinsics to save and restore the CSA (Context Save Area) chain.

This implementation saves upper/lower context registers and walks
the CSA linked list to restore the full call context on longjmp.

Signed-off-by: zhangyuan29 <zhangyuan29@xiaomi.com>
This commit is contained in:
zhangyuan29
2025-01-06 23:29:07 +08:00
committed by Xiang Xiao
parent fd907e6ef4
commit e087d0f79d
7 changed files with 203 additions and 0 deletions
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arch/tricore/include/setjmp.h
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/****************************************************************************
* arch/tricore/include/setjmp.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __ARCH_TRICORE_INCLUDE_SETJUMP_H
#define __ARCH_TRICORE_INCLUDE_SETJUMP_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
/****************************************************************************
* Pre-processor Prototypes
****************************************************************************/
#define JB_LPCXI 0
#define JB_LA11 1
#define JB_A2 2
#define JB_A3 3
#define JB_D0 4
#define JB_D1 5
#define JB_D2 6
#define JB_D3 7
#define JB_A4 8
#define JB_A5 9
#define JB_A6 10
#define JB_A7 11
#define JB_D4 12
#define JB_D5 13
#define JB_D6 14
#define JB_D7 15
#define JB_UA11 16
#define JB_REG_NUM 17
/****************************************************************************
* Public Types
****************************************************************************/
struct setjmp_buf_s
{
uintptr_t regs[JB_REG_NUM];
};
/* Traditional typedef for setjmp_buf */
typedef struct setjmp_buf_s jmp_buf[1];
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifdef __cplusplus
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
int setjmp(jmp_buf env);
void longjmp(jmp_buf env, int val);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* __ARCH_TRICORE_INCLUDE_SETJUMP_H */