diff options
Diffstat (limited to 'nuttx/arch/arm/src/armv7-m/up_fullcontextrestore.S')
-rwxr-xr-x | nuttx/arch/arm/src/armv7-m/up_fullcontextrestore.S | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/armv7-m/up_fullcontextrestore.S b/nuttx/arch/arm/src/armv7-m/up_fullcontextrestore.S new file mode 100755 index 000000000..3ce51c9cd --- /dev/null +++ b/nuttx/arch/arm/src/armv7-m/up_fullcontextrestore.S @@ -0,0 +1,95 @@ +/************************************************************************************ + * arch/arm/src/armv7-m/up_fullcontextrestore.S + * + * Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 NuttX 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 <arch/irq.h> + +#include "nvic.h" +#include "svcall.h" + +/************************************************************************************ + * Preprocessor Definitions + ************************************************************************************/ + +/************************************************************************************ + * Global Symbols + ************************************************************************************/ + + .syntax unified + .thumb + .file "up_fullcontextrestore.S" + +/************************************************************************************ + * Macros + ************************************************************************************/ + +/************************************************************************************ + * Public Functions + ************************************************************************************/ + +/************************************************************************************ + * Name: up_fullcontextrestore + * + * Description: + * Restore the current thread context. Full prototype is: + * + * void up_fullcontextrestore(uint32_t *restoreregs) __attribute__ ((noreturn)); + * + * Return: + * None + * + ************************************************************************************/ + + .thumb_func + .globl up_fullcontextrestore + .type up_fullcontextrestore, function +up_fullcontextrestore: + + /* Perform the System call with R0=1 and R1=regs */ + + mov r1, r0 /* R1: regs */ + mov r0, #SYS_restore_context /* R0: restore context */ + svc 0 /* Force synchronous SVCall (or Hard Fault) */ + + /* This call should not return */ + + bx lr /* Unnecessary ... will not return */ + .size up_fullcontextrestore, .-up_fullcontextrestore + .end + |