From c8e4cbd63bba53290014a54d854286a14798580e Mon Sep 17 00:00:00 2001 From: patacongo Date: Sat, 8 Nov 2008 15:12:56 +0000 Subject: Initial vector handling logic git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1166 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/sh/src/sh1/sh1_tramp.h | 95 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 nuttx/arch/sh/src/sh1/sh1_tramp.h (limited to 'nuttx/arch/sh/src/sh1/sh1_tramp.h') diff --git a/nuttx/arch/sh/src/sh1/sh1_tramp.h b/nuttx/arch/sh/src/sh1/sh1_tramp.h new file mode 100644 index 000000000..4be4bcf2b --- /dev/null +++ b/nuttx/arch/sh/src/sh1/sh1_tramp.h @@ -0,0 +1,95 @@ +/************************************************************************************ + * arch/sh/src/sh1/sh1_tramp.h + * + * Copyright (C) 2008 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * 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. + * + ************************************************************************************/ + +#ifndef __ARCH_SH_SRC_SH1_TRAMPOLINE_H +#define __ARCH_SH_SRC_SH1_TRAMPOLINE_H + +/************************************************************************************ + * Included Files + ************************************************************************************/ + +#include +#include + +/************************************************************************************ + * Definitions + ************************************************************************************/ + +/************************************************************************************ + * External references + ************************************************************************************/ + + .globl _up_vector + +/************************************************************************************ + * Macro: trampoline + * + * Description: + * Enter on exception with: + * + * SP -> PC + * SR + * + * Branch to up_vector with: + * + * R4 : IRQ vector number + * SP -> Saved R4 + * Saved SP (R15) + * PC + * SR + * + ************************************************************************************/ + + .macro trampoline, \irq + .section .reset + stc.l r4, @-r15 /* Save R4 on the stack */ + bra _up_vector /* Jump to the common vector handling logic */ + mov #\irq, r4 /* With the IRQ number in R4 */ + .endr + +#endif /* __ARCH_SH_SRC_SH1_TRAMPOLINE_H */ + + + + + + + + + + + + + -- cgit v1.2.3