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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-08 15:12:56 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-08 15:12:56 +0000 |
commit | c8e4cbd63bba53290014a54d854286a14798580e (patch) | |
tree | d4ea40283619ebf269e6e854d52319b0b8b47c55 /nuttx/arch/sh/src/sh1/sh1_tramp.h | |
parent | b8dc1371efff31074dd636234544afc5d6996da6 (diff) | |
download | px4-nuttx-c8e4cbd63bba53290014a54d854286a14798580e.tar.gz px4-nuttx-c8e4cbd63bba53290014a54d854286a14798580e.tar.bz2 px4-nuttx-c8e4cbd63bba53290014a54d854286a14798580e.zip |
Initial vector handling logic
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1166 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/arch/sh/src/sh1/sh1_tramp.h')
-rw-r--r-- | nuttx/arch/sh/src/sh1/sh1_tramp.h | 95 |
1 files changed, 95 insertions, 0 deletions
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 <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 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 <nuttx/config.h>
+#include <arch/irq.h>
+
+/************************************************************************************
+ * 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 */
+
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