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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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3
libs/libc/machine/Make.defs
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@ -53,6 +53,9 @@ endif
ifeq ($(CONFIG_ARCH_SPARC),y)
include $(TOPDIR)/libs/libc/machine/sparc/Make.defs
endif
ifeq ($(CONFIG_ARCH_TRICORE),y)
include $(TOPDIR)/libs/libc/machine/tricore/Make.defs
endif
DEPPATH += --dep-path machine
VPATH += :machine

8
libs/libc/machine/tricore/CMakeLists.txt
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@ -19,3 +19,11 @@
# the License.
#
# ##############################################################################
set(SRCS)
if(CONFIG_ARCH_SETJMP_H)
list(APPEND SRCS arch_setjmp.c)
endif()
target_sources(c PRIVATE ${SRCS})

4
libs/libc/machine/tricore/Kconfig Normal file
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@ -0,0 +1,4 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

28
libs/libc/machine/tricore/Make.defs Normal file
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@ -0,0 +1,28 @@
############################################################################
# libs/libc/machine/tricore/Make.defs
#
# SPDX-License-Identifier: Apache-2.0
#
# 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.
#
############################################################################
ifeq ($(CONFIG_ARCH_SETJMP_H),y)
CSRCS += arch_setjmp.c
endif
DEPPATH += --dep-path machine/tricore
VPATH += :machine/tricore

69
libs/libc/machine/tricore/arch_setjmp.c Normal file
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@ -0,0 +1,69 @@
/****************************************************************************
* libs/libc/machine/tricore/arch_setjmp.c
*
* SPDX-License-Identifier: Apache-2.0
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <string.h>
#include <arch/setjmp.h>
#include <nuttx/arch.h>
#include <IfxCpu_reg.h>
#include <IfxCpu_Intrinsics.h>
/****************************************************************************
* Public Functions
****************************************************************************/
int setjmp(jmp_buf env)
{
uintptr_t *regs;
uintptr_t pcxi;
env->regs[JB_UA11] = (uintptr_t)__getA11();
pcxi = __mfcr(CPU_PCXI);
regs = tricore_csa2addr(pcxi);
memcpy(env, regs, TC_CONTEXT_SIZE);
return 0;
}
void longjmp(jmp_buf env, int val)
{
void *func = (void *)env->regs[JB_UA11];
uintptr_t *regs;
uintptr_t pcxi;
pcxi = __mfcr(CPU_PCXI);
regs = tricore_csa2addr(pcxi);
memcpy(regs, env, TC_CONTEXT_SIZE);
if (val == 0)
{
val = 1;
}
__moveToDataParamRet(val);
__jumpToFunctionWithLink(func);
}