diff options
Diffstat (limited to 'nuttx/arch/c5471/src/up_initialstate.c')
-rw-r--r-- | nuttx/arch/c5471/src/up_initialstate.c | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/nuttx/arch/c5471/src/up_initialstate.c b/nuttx/arch/c5471/src/up_initialstate.c new file mode 100644 index 0000000000..3a26c45f1a --- /dev/null +++ b/nuttx/arch/c5471/src/up_initialstate.c @@ -0,0 +1,85 @@ +/************************************************************ + * up_initialstate.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ************************************************************/ + +/************************************************************ + * Included Files + ************************************************************/ + +#include <nuttx/config.h> +#include <sys/types.h> +#include <string.h> +#include <nuttx/arch.h> +#include "up_internal.h" + +/************************************************************ + * Private Definitions + ************************************************************/ + +/************************************************************ + * Private Data + ************************************************************/ + +/************************************************************ + * Private Funtions + ************************************************************/ + +/************************************************************ + * Public Funtions + ************************************************************/ + +/************************************************************ + * Name: up_initial_state + * + * Description: + * A new thread is being started and a new TCB + * has been created. This function is called to initialize + * the processor specific portions of the new TCB. + * + * This function must setup the intial architecture registers + * and/or stack so that execution will begin at tcb->start + * on the next context switch. + * + ************************************************************/ + +void up_initial_state(_TCB *tcb) +{ + struct xcptcontext *xcp = &tcb->xcp; + + /* Initialize the initial exception register context structure */ + + memset(xcp, 0, sizeof(struct xcptcontext)); + xcp->regs[JB_SP] = (uint32)tcb->adj_stack_ptr; + xcp->regs[JB_LR] = (uint32)tcb->start; +} |