From ba94a1bba3600d387edba7eb451990d9891e1c2f Mon Sep 17 00:00:00 2001
From: Wolfgang Denk <wd@castor.denx.de>
Date: Tue, 30 May 2006 15:56:48 +0200
Subject: * Update Intel IXP4xx support - Add IXP4xx NPE ethernet MAC support -
 Add support for Intel IXDPG425 board - Add support for Prodrive PDNB3 board -
 Add IRQ support Patch by Stefan Roese, 23 May 2006

[This patch does not include cpu/ixp/npe/IxNpeMicrocode.c which still
 sufferes from licensing issues. Blame Intel.]
---
 cpu/ixp/npe/include/IxEthDBLocks_p.h | 122 +++++++++++++++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 cpu/ixp/npe/include/IxEthDBLocks_p.h

(limited to 'cpu/ixp/npe/include/IxEthDBLocks_p.h')

diff --git a/cpu/ixp/npe/include/IxEthDBLocks_p.h b/cpu/ixp/npe/include/IxEthDBLocks_p.h
new file mode 100644
index 0000000..1d8b24f
--- /dev/null
+++ b/cpu/ixp/npe/include/IxEthDBLocks_p.h
@@ -0,0 +1,122 @@
+/**
+ * @file IxEthAccDBLocks_p.h
+ *
+ * @brief Definition of transaction lock stacks and lock utility macros
+ * 
+ * @par
+ * IXP400 SW Release version 2.0
+ * 
+ * -- Copyright Notice --
+ * 
+ * @par
+ * Copyright 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * @par
+ * 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 of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * @par
+ * 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.
+ * 
+ * @par
+ * -- End of Copyright Notice --
+ */
+
+#ifndef IxEthAccDBLocks_p_H
+#define IxEthAccDBLocks_p_H
+
+#include "IxOsPrintf.h"
+
+/* Lock and lock stacks */
+typedef struct
+{
+    IxOsalFastMutex* locks[MAX_LOCKS];
+    UINT32 stackPointer, basePointer;
+} LockStack;
+
+#define TRY_LOCK(mutex) \
+    { \
+        if (ixOsalFastMutexTryLock(mutex) != IX_SUCCESS) \
+        { \
+            return IX_ETH_DB_BUSY; \
+        } \
+    }
+
+
+#define UNLOCK(mutex) { ixOsalFastMutexUnlock(mutex); }
+
+#define INIT_STACK(stack) \
+    { \
+        (stack)->basePointer  = 0; \
+        (stack)->stackPointer = 0; \
+    }
+
+#define PUSH_LOCK(stack, lock) \
+    { \
+        if ((stack)->stackPointer == MAX_LOCKS) \
+        { \
+            ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on push, heavy chaining?\n"); \
+            UNROLL_STACK(stack); \
+            \
+            return IX_ETH_DB_NOMEM; \
+        } \
+        \
+        if (ixOsalFastMutexTryLock(lock) == IX_SUCCESS) \
+        { \
+            (stack)->locks[(stack)->stackPointer++] = (lock); \
+        } \
+        else \
+        { \
+            UNROLL_STACK(stack); \
+            \
+            return IX_ETH_DB_BUSY; \
+        } \
+    }
+
+#define POP_LOCK(stack) \
+    { \
+        ixOsalFastMutexUnlock((stack)->locks[--(stack)->stackPointer]); \
+    }
+
+#define UNROLL_STACK(stack) \
+    { \
+        while ((stack)->stackPointer > (stack)->basePointer) \
+        { \
+            POP_LOCK(stack); \
+        } \
+    }
+
+#define SHIFT_STACK(stack) \
+    { \
+        if ((stack)->basePointer == MAX_LOCKS - 1) \
+        { \
+            ERROR_LOG("Ethernet DB: maximum number of elements in a lock stack has been exceeded on shift, heavy chaining?\n"); \
+            UNROLL_STACK(stack); \
+            \
+            return IX_ETH_DB_BUSY; \
+        } \
+        \
+        ixOsalFastMutexUnlock((stack)->locks[(stack)->basePointer++]); \
+    }
+
+#endif /* IxEthAccDBLocks_p_H */
-- 
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