* 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.]

1 files changed, 963 insertions, 0 deletions

diff --git a/cpu/ixp/npe/IxQMgrAqmIf.c b/cpu/ixp/npe/IxQMgrAqmIf.c
new file mode 100644
index 0000000000..b27b3a2877
--- /dev/null
+++ b/cpu/ixp/npe/IxQMgrAqmIf.c
@@ -0,0 +1,963 @@
+/* 
+ * @file:    IxQMgrAqmIf.c
+ *
+ * @author Intel Corporation
+ * @date     30-Oct-2001
+ *
+ * @brief    This component provides a set of functions for
+ * perfoming I/O on the AQM hardware.
+ * 
+ * Design Notes: 
+ *              These functions are intended to be as fast as possible
+ * and as a result perform NO PARAMETER CHECKING.
+ *
+ * 
+ * @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 --
+*/
+
+/*
+ * Inlines are compiled as function when this is defined.
+ * N.B. Must be placed before #include of "IxQMgrAqmIf_p.h
+ */
+#ifndef IXQMGRAQMIF_P_H
+#    define IXQMGRAQMIF_C
+#else
+#    error
+#endif
+
+/*
+ * User defined include files.
+ */
+#include "IxOsal.h"
+#include "IxQMgr.h"
+#include "IxQMgrAqmIf_p.h"
+#include "IxQMgrLog_p.h"
+
+
+/*
+ * #defines and macros used in this file.
+ */
+
+/* These defines are the bit offsets of the various fields of
+ * the queue configuration register
+ */
+#define IX_QMGR_Q_CONFIG_WRPTR_OFFSET       0x00
+#define IX_QMGR_Q_CONFIG_RDPTR_OFFSET       0x07
+#define IX_QMGR_Q_CONFIG_BADDR_OFFSET       0x0E
+#define IX_QMGR_Q_CONFIG_ESIZE_OFFSET       0x16
+#define IX_QMGR_Q_CONFIG_BSIZE_OFFSET       0x18
+#define IX_QMGR_Q_CONFIG_NE_OFFSET          0x1A
+#define IX_QMGR_Q_CONFIG_NF_OFFSET          0x1D
+
+#define IX_QMGR_BASE_ADDR_16_WORD_ALIGN     0x40
+#define IX_QMGR_BASE_ADDR_16_WORD_SHIFT     0x6
+
+#define IX_QMGR_NE_NF_CLEAR_MASK            0x03FFFFFF
+#define IX_QMGR_NE_MASK                     0x7
+#define IX_QMGR_NF_MASK                     0x7
+#define IX_QMGR_SIZE_MASK                   0x3
+#define IX_QMGR_ENTRY_SIZE_MASK             0x3
+#define IX_QMGR_BADDR_MASK                  0x003FC000
+#define IX_QMGR_RDPTR_MASK                  0x7F
+#define IX_QMGR_WRPTR_MASK                  0x7F
+#define IX_QMGR_RDWRPTR_MASK                0x00003FFF
+
+#define IX_QMGR_AQM_ADDRESS_SPACE_SIZE_IN_WORDS 0x1000
+
+/* Base address of AQM SRAM */
+#define IX_QMGR_AQM_SRAM_BASE_ADDRESS_OFFSET \
+((IX_QMGR_QUECONFIG_BASE_OFFSET) + (IX_QMGR_QUECONFIG_SIZE))
+
+/* Min buffer size used for generating buffer size in QUECONFIG */
+#define IX_QMGR_MIN_BUFFER_SIZE 16
+
+/* Reset values of QMgr hardware registers */
+#define IX_QMGR_QUELOWSTAT_RESET_VALUE    0x33333333
+#define IX_QMGR_QUEUOSTAT_RESET_VALUE     0x00000000
+#define IX_QMGR_QUEUPPSTAT0_RESET_VALUE   0xFFFFFFFF
+#define IX_QMGR_QUEUPPSTAT1_RESET_VALUE   0x00000000
+#define IX_QMGR_INT0SRCSELREG_RESET_VALUE 0x00000000
+#define IX_QMGR_QUEIEREG_RESET_VALUE      0x00000000
+#define IX_QMGR_QINTREG_RESET_VALUE       0xFFFFFFFF
+#define IX_QMGR_QUECONFIG_RESET_VALUE     0x00000000
+
+#define IX_QMGR_PHYSICAL_AQM_BASE_ADDRESS IX_OSAL_IXP400_QMGR_PHYS_BASE
+
+#define IX_QMGR_QUELOWSTAT_BITS_PER_Q (BITS_PER_WORD/IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)
+
+#define IX_QMGR_QUELOWSTAT_QID_MASK 0x7
+#define IX_QMGR_Q_CONFIG_ADDR_GET(qId)\
+        (((qId) * IX_QMGR_NUM_BYTES_PER_WORD) +\
+                  IX_QMGR_QUECONFIG_BASE_OFFSET)
+
+#define IX_QMGR_ENTRY1_OFFSET 0
+#define IX_QMGR_ENTRY2_OFFSET 1
+#define IX_QMGR_ENTRY4_OFFSET 3
+
+/*
+ * Variable declarations global to this file. Externs are followed by
+ * statics.
+ */
+UINT32 aqmBaseAddress = 0;
+/* Store addresses and bit-masks for certain queue access and status registers.
+ * This is to facilitate inlining of QRead, QWrite and QStatusGet functions
+ * in IxQMgr,h
+ */
+extern IxQMgrQInlinedReadWriteInfo ixQMgrQInlinedReadWriteInfo[];
+UINT32 * ixQMgrAqmIfQueAccRegAddr[IX_QMGR_MAX_NUM_QUEUES];
+UINT32 ixQMgrAqmIfQueLowStatRegAddr[IX_QMGR_MIN_QUEUPP_QID];
+UINT32 ixQMgrAqmIfQueLowStatBitsOffset[IX_QMGR_MIN_QUEUPP_QID];
+UINT32 ixQMgrAqmIfQueLowStatBitsMask;
+UINT32 ixQMgrAqmIfQueUppStat0RegAddr;
+UINT32 ixQMgrAqmIfQueUppStat1RegAddr;
+UINT32 ixQMgrAqmIfQueUppStat0BitMask[IX_QMGR_MIN_QUEUPP_QID];
+UINT32 ixQMgrAqmIfQueUppStat1BitMask[IX_QMGR_MIN_QUEUPP_QID];
+
+/* 
+ * Fast mutexes, one for each queue, used to protect peek & poke functions
+ */
+IxOsalFastMutex ixQMgrAqmIfPeekPokeFastMutex[IX_QMGR_MAX_NUM_QUEUES];
+
+/*
+ * Function prototypes
+ */
+PRIVATE unsigned
+watermarkToAqmWatermark (IxQMgrWMLevel watermark );
+
+PRIVATE unsigned
+entrySizeToAqmEntrySize (IxQMgrQEntrySizeInWords entrySize);
+
+PRIVATE unsigned
+bufferSizeToAqmBufferSize (unsigned bufferSizeInWords);
+
+PRIVATE void
+ixQMgrAqmIfRegistersReset (void);
+
+PRIVATE void
+ixQMgrAqmIfEntryAddressGet (unsigned int entryIndex,
+			    UINT32 configRegWord,
+			    unsigned int qEntrySizeInwords,
+			    unsigned int qSizeInWords,
+			    UINT32 **address);
+/*
+ * Function definitions
+ */
+void
+ixQMgrAqmIfInit (void)
+{
+    UINT32 aqmVirtualAddr;
+    int i;
+
+    /* The value of aqmBaseAddress depends on the logical address
+     * assigned by the MMU.
+     */
+    aqmVirtualAddr =
+	(UINT32) IX_OSAL_MEM_MAP(IX_QMGR_PHYSICAL_AQM_BASE_ADDRESS,
+				    IX_OSAL_IXP400_QMGR_MAP_SIZE);
+    IX_OSAL_ASSERT (aqmVirtualAddr);
+    
+    ixQMgrAqmIfBaseAddressSet (aqmVirtualAddr);
+
+    ixQMgrAqmIfRegistersReset ();
+
+    for (i = 0; i< IX_QMGR_MAX_NUM_QUEUES; i++)
+    {
+	ixOsalFastMutexInit(&ixQMgrAqmIfPeekPokeFastMutex[i]);
+
+	/********************************************************************
+	 * Register addresses and bit masks are calculated and stored here to
+	 * facilitate inlining of QRead, QWrite and QStatusGet functions in
+	 * IxQMgr.h.
+	 * These calculations are normally performed dynamically in inlined
+	 * functions in IxQMgrAqmIf_p.h, and their semantics are reused here.
+	 */
+
+	/* AQM Queue access reg addresses, per queue */
+   	ixQMgrAqmIfQueAccRegAddr[i] = 
+	    (UINT32 *)(aqmBaseAddress + IX_QMGR_Q_ACCESS_ADDR_GET(i));
+	ixQMgrQInlinedReadWriteInfo[i].qAccRegAddr = 
+	    (volatile UINT32 *)(aqmBaseAddress + IX_QMGR_Q_ACCESS_ADDR_GET(i));
+
+
+	ixQMgrQInlinedReadWriteInfo[i].qConfigRegAddr = 
+	    (volatile UINT32 *)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(i));
+
+	/* AQM Queue lower-group (0-31), only */
+	if (i < IX_QMGR_MIN_QUEUPP_QID)
+	{
+	    /* AQM Q underflow/overflow status register addresses, per queue */
+	    ixQMgrQInlinedReadWriteInfo[i].qUOStatRegAddr = 
+		(volatile UINT32 *)(aqmBaseAddress +
+		IX_QMGR_QUEUOSTAT0_OFFSET +
+		((i / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD) *
+		 IX_QMGR_NUM_BYTES_PER_WORD));
+
+	    /* AQM Q underflow status bit masks for status register per queue */
+	    ixQMgrQInlinedReadWriteInfo[i].qUflowStatBitMask = 
+		(IX_QMGR_UNDERFLOW_BIT_OFFSET + 1) <<
+		((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
+		 (BITS_PER_WORD / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
+
+	    /* AQM Q overflow status bit masks for status register, per queue */
+	    ixQMgrQInlinedReadWriteInfo[i].qOflowStatBitMask = 
+		(IX_QMGR_OVERFLOW_BIT_OFFSET + 1) <<
+		((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) *
+		 (BITS_PER_WORD / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD));
+
+	    /* AQM Q lower-group (0-31) status register addresses, per queue */
+	    ixQMgrAqmIfQueLowStatRegAddr[i] = aqmBaseAddress +
+		IX_QMGR_QUELOWSTAT0_OFFSET +
+		((i / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) *
+		 IX_QMGR_NUM_BYTES_PER_WORD);
+
+	    /* AQM Q lower-group (0-31) status register bit offset */
+	    ixQMgrAqmIfQueLowStatBitsOffset[i] =
+		(i & (IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD - 1)) * 
+		(BITS_PER_WORD / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD);
+	}
+	else /* AQM Q upper-group (32-63), only */
+	{
+	    /* AQM Q upper-group (32-63) Nearly Empty status reg bit masks */
+	    ixQMgrAqmIfQueUppStat0BitMask[i - IX_QMGR_MIN_QUEUPP_QID] =
+		(1 << (i - IX_QMGR_MIN_QUEUPP_QID));
+
+	    /* AQM Q upper-group (32-63) Full status register bit masks */
+	    ixQMgrAqmIfQueUppStat1BitMask[i - IX_QMGR_MIN_QUEUPP_QID] =
+		(1 << (i - IX_QMGR_MIN_QUEUPP_QID));
+	}
+    }
+
+    /* AQM Q lower-group (0-31) status register bit mask */
+    ixQMgrAqmIfQueLowStatBitsMask = (1 <<
+				    (BITS_PER_WORD /
+				     IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)) - 1;
+
+    /* AQM Q upper-group (32-63) Nearly Empty status register address */
+    ixQMgrAqmIfQueUppStat0RegAddr = aqmBaseAddress + IX_QMGR_QUEUPPSTAT0_OFFSET;
+    
+    /* AQM Q upper-group (32-63) Full status register address */
+    ixQMgrAqmIfQueUppStat1RegAddr = aqmBaseAddress + IX_QMGR_QUEUPPSTAT1_OFFSET;
+}
+
+/*
+ * Uninitialise the AqmIf module by unmapping memory, etc
+ */
+void
+ixQMgrAqmIfUninit (void)
+{
+    UINT32 virtAddr;
+
+    ixQMgrAqmIfBaseAddressGet (&virtAddr);
+    IX_OSAL_MEM_UNMAP (virtAddr);
+    ixQMgrAqmIfBaseAddressSet (0);
+}
+
+/*
+ * Set the the logical base address of AQM
+ */
+void
+ixQMgrAqmIfBaseAddressSet (UINT32 address)
+{
+    aqmBaseAddress = address;
+}
+
+/*
+ * Get the logical base address of AQM
+ */
+void
+ixQMgrAqmIfBaseAddressGet (UINT32 *address)
+{
+    *address = aqmBaseAddress;
+}
+
+/*
+ * Get the logical base address of AQM SRAM
+ */
+void
+ixQMgrAqmIfSramBaseAddressGet (UINT32 *address)
+{
+    *address = aqmBaseAddress                +
+	IX_QMGR_AQM_SRAM_BASE_ADDRESS_OFFSET;
+}
+
+/*
+ * This function will write the status bits of a queue
+ * specified by qId.
+ */
+void
+ixQMgrAqmIfQRegisterBitsWrite (IxQMgrQId qId, 
+			       UINT32 registerBaseAddrOffset,
+			       unsigned queuesPerRegWord,
+			       UINT32 value)
+{
+    volatile UINT32 *registerAddress;
+    UINT32 registerWord;
+    UINT32 statusBitsMask;
+    UINT32 bitsPerQueue;
+
+    bitsPerQueue = BITS_PER_WORD / queuesPerRegWord;
+
+    /*
+     * Calculate the registerAddress
+     * multiple queues split accross registers
+     */
+    registerAddress = (UINT32*)(aqmBaseAddress +
+				registerBaseAddrOffset +
+				((qId / queuesPerRegWord) *
+				 IX_QMGR_NUM_BYTES_PER_WORD));    
+
+    /* Read the current data */
+    ixQMgrAqmIfWordRead (registerAddress, &registerWord);
+
+
+    if( (registerBaseAddrOffset == IX_QMGR_INT0SRCSELREG0_OFFSET) &&
+        (qId == IX_QMGR_QUEUE_0) )
+    {
+      statusBitsMask = 0x7 ;   
+
+      /* Queue 0 at INT0SRCSELREG should not corrupt the value bit-3  */
+      value &=  0x7 ;        
+    }
+    else
+    {     
+      /* Calculate the mask for the status bits for this queue. */
+      statusBitsMask = ((1 << bitsPerQueue) - 1);
+      statusBitsMask <<= ((qId & (queuesPerRegWord - 1)) * bitsPerQueue);
+
+      /* Mask out bits in value that would overwrite other q data */
+      value <<= ((qId & (queuesPerRegWord - 1)) * bitsPerQueue);
+      value &= statusBitsMask;
+    }
+
+    /* Mask out bits to write to */
+    registerWord &= ~statusBitsMask;
+    
+
+    /* Set the write bits */
+    registerWord |= value;
+
+    /*
+     * Write the data
+     */
+    ixQMgrAqmIfWordWrite (registerAddress, registerWord);
+}
+
+/*
+ * This function generates the parameters that can be used to
+ * check if a Qs status matches the specified source select.
+ * It calculates which status word to check (statusWordOffset),
+ * the value to check the status against (checkValue) and the
+ * mask (mask) to mask out all but the bits to check in the status word.
+ */
+void
+ixQMgrAqmIfQStatusCheckValsCalc (IxQMgrQId qId,
+				 IxQMgrSourceId srcSel,
+				 unsigned int *statusWordOffset,
+				 UINT32 *checkValue,
+				 UINT32 *mask)
+{
+    UINT32 shiftVal;
+   
+    if (qId < IX_QMGR_MIN_QUEUPP_QID)
+    {
+	switch (srcSel)
+	{
+	    case IX_QMGR_Q_SOURCE_ID_E:
+		*checkValue = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		*mask = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NE:
+		*checkValue = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		*mask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NF:
+		*checkValue = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		*mask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_F:
+		*checkValue = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		*mask = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_E:
+		*checkValue = 0;
+		*mask = IX_QMGR_Q_STATUS_E_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_NE:
+		*checkValue = 0;
+		*mask = IX_QMGR_Q_STATUS_NE_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_NF:
+		*checkValue = 0;
+		*mask = IX_QMGR_Q_STATUS_NF_BIT_MASK;
+		break;
+	    case IX_QMGR_Q_SOURCE_ID_NOT_F:
+		*checkValue = 0;
+		*mask = IX_QMGR_Q_STATUS_F_BIT_MASK;
+		break;
+	    default:
+		/* Should never hit */
+		IX_OSAL_ASSERT(0);
+		break;
+	}
+
+	/* One nibble of status per queue so need to shift the
+	 * check value and mask out to the correct position.
+	 */
+	shiftVal = (qId % IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) * 
+	    IX_QMGR_QUELOWSTAT_BITS_PER_Q;
+
+	/* Calculate the which status word to check from the qId,
+	 * 8 Qs status per word
+	 */
+	*statusWordOffset = qId / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD;
+
+	*checkValue <<= shiftVal;
+	*mask <<= shiftVal;
+    }
+    else
+    {
+	/* One status word */
+	*statusWordOffset = 0;
+	/* Single bits per queue and int source bit hardwired  NE,
+	 * Qs start at 32.
+	 */
+	*mask = 1 << (qId - IX_QMGR_MIN_QUEUPP_QID);
+	*checkValue = *mask;
+    }
+}
+
+void
+ixQMgrAqmIfQInterruptEnable (IxQMgrQId qId)
+{
+    volatile UINT32 *registerAddress;
+    UINT32 registerWord;
+    UINT32 actualBitOffset;
+    
+    if (qId < IX_QMGR_MIN_QUEUPP_QID)
+    {    
+	registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET);
+    }
+    else
+    {
+	registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET);
+    }
+
+    actualBitOffset = 1 << (qId % IX_QMGR_MIN_QUEUPP_QID);
+
+    ixQMgrAqmIfWordRead (registerAddress, &registerWord);
+    ixQMgrAqmIfWordWrite (registerAddress, (registerWord | actualBitOffset));
+}
+
+void
+ixQMgrAqmIfQInterruptDisable (IxQMgrQId qId)
+{
+    volatile UINT32 *registerAddress;
+    UINT32 registerWord;
+    UINT32 actualBitOffset;
+
+    if (qId < IX_QMGR_MIN_QUEUPP_QID)
+    {    
+	registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET);
+    }
+    else
+    {
+	registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET);
+    }
+
+    actualBitOffset = 1 << (qId % IX_QMGR_MIN_QUEUPP_QID);
+
+    ixQMgrAqmIfWordRead (registerAddress, &registerWord);
+    ixQMgrAqmIfWordWrite (registerAddress, registerWord & (~actualBitOffset));
+}
+
+void
+ixQMgrAqmIfQueCfgWrite (IxQMgrQId qId,
+		       IxQMgrQSizeInWords qSizeInWords,
+		       IxQMgrQEntrySizeInWords entrySizeInWords,
+		       UINT32 freeSRAMAddress)
+{
+    volatile UINT32 *cfgAddress = NULL;
+    UINT32 qCfg = 0;
+    UINT32 baseAddress = 0;
+    unsigned aqmEntrySize = 0;
+    unsigned aqmBufferSize = 0;
+
+    /* Build config register */
+    aqmEntrySize = entrySizeToAqmEntrySize (entrySizeInWords);
+    qCfg |= (aqmEntrySize&IX_QMGR_ENTRY_SIZE_MASK) <<
+	IX_QMGR_Q_CONFIG_ESIZE_OFFSET;
+
+    aqmBufferSize = bufferSizeToAqmBufferSize (qSizeInWords);
+    qCfg |= (aqmBufferSize&IX_QMGR_SIZE_MASK) << IX_QMGR_Q_CONFIG_BSIZE_OFFSET;
+
+    /* baseAddress, calculated relative to aqmBaseAddress and start address  */
+    baseAddress = freeSRAMAddress -
+	(aqmBaseAddress + IX_QMGR_QUECONFIG_BASE_OFFSET);
+		   
+    /* Verify base address aligned to a 16 word boundary */
+    if ((baseAddress % IX_QMGR_BASE_ADDR_16_WORD_ALIGN) != 0)
+    {
+	IX_QMGR_LOG_ERROR0("ixQMgrAqmIfQueCfgWrite () address is not on 16 word boundary\n");
+    }
+    /* Now convert it to a 16 word pointer as required by QUECONFIG register */
+    baseAddress >>= IX_QMGR_BASE_ADDR_16_WORD_SHIFT;
+    
+    
+    qCfg |= (baseAddress << IX_QMGR_Q_CONFIG_BADDR_OFFSET);
+
+
+    cfgAddress = (UINT32*)(aqmBaseAddress +
+			IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+
+
+    /* NOTE: High and Low watermarks are set to zero */
+    ixQMgrAqmIfWordWrite (cfgAddress, qCfg);
+}
+
+void
+ixQMgrAqmIfQueCfgRead (IxQMgrQId qId,
+		       unsigned int numEntries,
+		       UINT32 *baseAddress,
+		       unsigned int *ne,
+		       unsigned int *nf,
+		       UINT32 *readPtr,
+		       UINT32 *writePtr)
+{
+    UINT32 qcfg;
+    UINT32 *cfgAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+    unsigned int qEntrySizeInwords;
+    unsigned int qSizeInWords;
+    UINT32 *readPtr_ = NULL;
+	
+    /* Read the queue configuration register */
+    ixQMgrAqmIfWordRead (cfgAddress, &qcfg);
+    
+    /* Extract the base address */
+    *baseAddress = (UINT32)((qcfg & IX_QMGR_BADDR_MASK) >>
+			    (IX_QMGR_Q_CONFIG_BADDR_OFFSET));
+
+    /* Base address is a 16 word pointer from the start of AQM SRAM.
+     * Convert to absolute word address.
+     */
+    *baseAddress <<= IX_QMGR_BASE_ADDR_16_WORD_SHIFT;
+    *baseAddress += (UINT32)IX_QMGR_QUECONFIG_BASE_OFFSET;
+
+    /*
+     * Extract the watermarks. 0->0 entries, 1->1 entries, 2->2 entries, 3->4 entries......
+     * If ne > 0 ==> neInEntries = 2^(ne - 1)
+     * If ne == 0 ==> neInEntries = 0
+     * The same applies.
+     */
+    *ne = ((qcfg) >> (IX_QMGR_Q_CONFIG_NE_OFFSET)) & IX_QMGR_NE_MASK;
+    *nf = ((qcfg) >> (IX_QMGR_Q_CONFIG_NF_OFFSET)) & IX_QMGR_NF_MASK;
+
+    if (0 != *ne)
+    {
+	*ne = 1 << (*ne - 1);	
+    }
+    if (0 != *nf)
+    {
+	*nf = 1 << (*nf - 1);
+    }
+
+    /* Get the queue entry size in words */
+    qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId);
+
+    /* Get the queue size in words */
+    qSizeInWords = ixQMgrQSizeInWordsGet (qId);
+
+    ixQMgrAqmIfEntryAddressGet (0/* Entry 0. i.e the readPtr*/,
+				qcfg,
+				qEntrySizeInwords,
+				qSizeInWords,
+				&readPtr_);
+    *readPtr = (UINT32)readPtr_;
+    *readPtr -= (UINT32)aqmBaseAddress;/* Offset, not absolute address */
+
+    *writePtr = (qcfg >> IX_QMGR_Q_CONFIG_WRPTR_OFFSET) & IX_QMGR_WRPTR_MASK;
+    *writePtr = *baseAddress + (*writePtr * (IX_QMGR_NUM_BYTES_PER_WORD));
+    return;
+}
+
+unsigned
+ixQMgrAqmIfLog2 (unsigned number)
+{
+    unsigned count = 0;
+
+    /*
+     * N.B. this function will return 0
+     * for ixQMgrAqmIfLog2 (0)
+     */
+    while (number/2)
+    {
+	number /=2;
+	count++;	
+    }
+
+    return count;
+}
+
+void ixQMgrAqmIfIntSrcSelReg0Bit3Set (void)
+{
+
+    volatile UINT32 *registerAddress;
+    UINT32 registerWord; 
+
+    /*
+     * Calculate the registerAddress
+     * multiple queues split accross registers
+     */
+    registerAddress = (UINT32*)(aqmBaseAddress +
+				IX_QMGR_INT0SRCSELREG0_OFFSET);    
+
+    /* Read the current data */
+    ixQMgrAqmIfWordRead (registerAddress, &registerWord);
+
+    /* Set the write bits */
+    registerWord |= (1<<IX_QMGR_INT0SRCSELREG0_BIT3) ;
+
+    /*
+     * Write the data
+     */
+    ixQMgrAqmIfWordWrite (registerAddress, registerWord);
+}  
+
+
+void
+ixQMgrAqmIfIntSrcSelWrite (IxQMgrQId qId,
+			  IxQMgrSourceId sourceId)
+{
+    ixQMgrAqmIfQRegisterBitsWrite (qId,
+				   IX_QMGR_INT0SRCSELREG0_OFFSET,
+				   IX_QMGR_INTSRC_NUM_QUE_PER_WORD,
+				   sourceId);
+}
+
+
+
+void
+ixQMgrAqmIfWatermarkSet (IxQMgrQId qId,
+			unsigned ne,
+			unsigned nf)
+{
+    volatile UINT32 *address = 0;
+    UINT32 value = 0;
+    unsigned aqmNeWatermark = 0;
+    unsigned aqmNfWatermark = 0;
+
+    address = (UINT32*)(aqmBaseAddress +
+		     IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+
+    aqmNeWatermark = watermarkToAqmWatermark (ne);
+    aqmNfWatermark = watermarkToAqmWatermark (nf);
+
+    /* Read the current watermarks */
+    ixQMgrAqmIfWordRead (address, &value);
+
+    /* Clear out the old watermarks */
+    value &=  IX_QMGR_NE_NF_CLEAR_MASK;
+    
+    /* Generate the value to write */
+    value |= (aqmNeWatermark << IX_QMGR_Q_CONFIG_NE_OFFSET) |
+	(aqmNfWatermark << IX_QMGR_Q_CONFIG_NF_OFFSET); 
+
+    ixQMgrAqmIfWordWrite (address, value);
+
+}
+
+PRIVATE void
+ixQMgrAqmIfEntryAddressGet (unsigned int entryIndex,
+			    UINT32 configRegWord,
+			    unsigned int qEntrySizeInwords,
+			    unsigned int qSizeInWords,
+			    UINT32 **address)
+{
+    UINT32 readPtr;
+    UINT32 baseAddress;
+    UINT32 *topOfAqmSram;
+
+    topOfAqmSram = ((UINT32 *)aqmBaseAddress + IX_QMGR_AQM_ADDRESS_SPACE_SIZE_IN_WORDS);
+
+    /* Extract the base address */
+    baseAddress = (UINT32)((configRegWord & IX_QMGR_BADDR_MASK) >>
+			   (IX_QMGR_Q_CONFIG_BADDR_OFFSET));
+
+    /* Base address is a 16 word pointer from the start of AQM SRAM.
+     * Convert to absolute word address.
+     */
+    baseAddress <<= IX_QMGR_BASE_ADDR_16_WORD_SHIFT;
+    baseAddress += ((UINT32)aqmBaseAddress + (UINT32)IX_QMGR_QUECONFIG_BASE_OFFSET);
+
+    /* Extract the read pointer. Read pointer is a word pointer */
+    readPtr = (UINT32)((configRegWord >>
+			IX_QMGR_Q_CONFIG_RDPTR_OFFSET)&IX_QMGR_RDPTR_MASK);
+
+    /* Read/Write pointers(word pointers)  are offsets from the queue buffer space base address.
+     * Calculate the absolute read pointer address. NOTE: Queues are circular buffers.
+     */
+    readPtr  = (readPtr + (entryIndex * qEntrySizeInwords)) & (qSizeInWords - 1); /* Mask by queue size */
+    *address = (UINT32 *)(baseAddress + (readPtr * (IX_QMGR_NUM_BYTES_PER_WORD)));
+
+    switch (qEntrySizeInwords)
+    {
+	case IX_QMGR_Q_ENTRY_SIZE1:
+	    IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY1_OFFSET) < topOfAqmSram);	    
+	    break;
+	case IX_QMGR_Q_ENTRY_SIZE2:
+	    IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY2_OFFSET) < topOfAqmSram);
+	    break;
+	case IX_QMGR_Q_ENTRY_SIZE4:
+	    IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY4_OFFSET) < topOfAqmSram);
+	    break;
+	default:
+	    IX_QMGR_LOG_ERROR0("Invalid Q Entry size passed to ixQMgrAqmIfEntryAddressGet");
+	    break;
+    }
+    
+}
+
+IX_STATUS
+ixQMgrAqmIfQPeek (IxQMgrQId qId,
+		  unsigned int entryIndex,
+		  unsigned int *entry)
+{
+    UINT32 *cfgRegAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+    UINT32 *entryAddress = NULL;
+    UINT32 configRegWordOnEntry;
+    UINT32 configRegWordOnExit;
+    unsigned int qEntrySizeInwords;
+    unsigned int qSizeInWords;
+
+    /* Get the queue entry size in words */
+    qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId);
+
+    /* Get the queue size in words */
+    qSizeInWords = ixQMgrQSizeInWordsGet (qId);
+
+    /* Read the config register */
+    ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnEntry);
+
+    /* Get the entry address */
+    ixQMgrAqmIfEntryAddressGet (entryIndex,
+				configRegWordOnEntry,
+				qEntrySizeInwords,
+				qSizeInWords,
+				&entryAddress);
+
+    /* Get the lock or return busy */
+    if (IX_SUCCESS != ixOsalFastMutexTryLock(&ixQMgrAqmIfPeekPokeFastMutex[qId]))
+    {
+	return IX_FAIL;
+    }
+
+    while(qEntrySizeInwords--)
+    {
+	ixQMgrAqmIfWordRead (entryAddress++, entry++);
+    }
+
+    /* Release the lock */
+    ixOsalFastMutexUnlock(&ixQMgrAqmIfPeekPokeFastMutex[qId]);
+
+    /* Read the config register */
+    ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnExit);
+
+    /* Check that the read and write pointers have not changed */
+    if (configRegWordOnEntry != configRegWordOnExit)
+    {
+	return IX_FAIL;
+    }
+
+    return IX_SUCCESS;
+}
+
+IX_STATUS
+ixQMgrAqmIfQPoke (IxQMgrQId qId,
+		  unsigned entryIndex,
+		  unsigned int *entry)
+{
+    UINT32 *cfgRegAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId));
+    UINT32 *entryAddress = NULL;
+    UINT32 configRegWordOnEntry;
+    UINT32 configRegWordOnExit;
+    unsigned int qEntrySizeInwords;
+    unsigned int qSizeInWords;
+    
+    /* Get the queue entry size in words */
+    qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId);
+
+    /* Get the queue size in words */
+    qSizeInWords = ixQMgrQSizeInWordsGet (qId);
+
+    /* Read the config register */
+    ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnEntry);
+
+    /* Get the entry address */
+    ixQMgrAqmIfEntryAddressGet (entryIndex,
+				configRegWordOnEntry,
+				qEntrySizeInwords,
+				qSizeInWords,
+				&entryAddress);
+
+    /* Get the lock or return busy */
+    if (IX_SUCCESS != ixOsalFastMutexTryLock(&ixQMgrAqmIfPeekPokeFastMutex[qId]))
+    {
+	return IX_FAIL;
+    }
+
+    /* Else read the entry directly from SRAM. This will not move the read pointer */
+    while(qEntrySizeInwords--)
+    {
+	ixQMgrAqmIfWordWrite (entryAddress++, *entry++);
+    }
+
+    /* Release the lock */
+    ixOsalFastMutexUnlock(&ixQMgrAqmIfPeekPokeFastMutex[qId]);
+
+    /* Read the config register */
+    ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnExit);
+
+    /* Check that the read and write pointers have not changed */
+    if (configRegWordOnEntry != configRegWordOnExit)
+    {
+	return IX_FAIL;
+    }
+
+    return IX_SUCCESS;
+}
+
+PRIVATE unsigned
+watermarkToAqmWatermark (IxQMgrWMLevel watermark )
+{
+    unsigned aqmWatermark = 0;
+
+    /*
+     * Watermarks 0("000"),1("001"),2("010"),4("011"),
+     * 8("100"),16("101"),32("110"),64("111")
+     */
+    aqmWatermark = ixQMgrAqmIfLog2 (watermark * 2);
+    
+    return aqmWatermark;
+}
+
+PRIVATE unsigned
+entrySizeToAqmEntrySize (IxQMgrQEntrySizeInWords entrySize)
+{
+    /* entrySize  1("00"),2("01"),4("10") */
+    return (ixQMgrAqmIfLog2 (entrySize));
+}
+
+PRIVATE unsigned
+bufferSizeToAqmBufferSize (unsigned bufferSizeInWords)
+{
+    /* bufferSize 16("00"),32("01),64("10"),128("11") */
+    return (ixQMgrAqmIfLog2 (bufferSizeInWords / IX_QMGR_MIN_BUFFER_SIZE));
+}
+
+/*
+ * Reset AQM registers to default values.
+ */
+PRIVATE void
+ixQMgrAqmIfRegistersReset (void)
+{
+    volatile UINT32 *qConfigWordAddress = NULL;
+    unsigned int i;
+
+    /*
+     * Need to initialize AQM hardware registers to an initial
+     * value as init may have been called as a result of a soft
+     * reset. i.e. soft reset does not reset hardware registers.
+     */
+
+    /* Reset queues 0..31 status registers 0..3 */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT0_OFFSET), 
+			 IX_QMGR_QUELOWSTAT_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT1_OFFSET), 
+			 IX_QMGR_QUELOWSTAT_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT2_OFFSET), 
+			 IX_QMGR_QUELOWSTAT_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT3_OFFSET), 
+			 IX_QMGR_QUELOWSTAT_RESET_VALUE);
+
+    /* Reset underflow/overflow status registers 0..1 */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUOSTAT0_OFFSET), 
+			 IX_QMGR_QUEUOSTAT_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUOSTAT1_OFFSET), 
+			 IX_QMGR_QUEUOSTAT_RESET_VALUE);
+    
+    /* Reset queues 32..63 nearly empty status registers */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUPPSTAT0_OFFSET),
+			 IX_QMGR_QUEUPPSTAT0_RESET_VALUE);
+
+    /* Reset queues 32..63 full status registers */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUPPSTAT1_OFFSET),
+			 IX_QMGR_QUEUPPSTAT1_RESET_VALUE);
+
+    /* Reset int0 status flag source select registers 0..3 */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG0_OFFSET),
+			 IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG1_OFFSET),
+			 IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG2_OFFSET),
+			 IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG3_OFFSET),
+			 IX_QMGR_INT0SRCSELREG_RESET_VALUE);
+	 
+    /* Reset queue interrupt enable register 0..1 */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET),
+			 IX_QMGR_QUEIEREG_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET),
+			 IX_QMGR_QUEIEREG_RESET_VALUE);
+
+    /* Reset queue interrupt register 0..1 */
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QINTREG0_OFFSET),
+			 IX_QMGR_QINTREG_RESET_VALUE);
+    ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QINTREG1_OFFSET),
+			 IX_QMGR_QINTREG_RESET_VALUE);
+
+    /* Reset queue configuration words 0..63 */
+    qConfigWordAddress = (UINT32 *)(aqmBaseAddress + IX_QMGR_QUECONFIG_BASE_OFFSET);
+    for (i = 0; i < (IX_QMGR_QUECONFIG_SIZE / sizeof(UINT32)); i++)
+    {
+	ixQMgrAqmIfWordWrite(qConfigWordAddress,
+			     IX_QMGR_QUECONFIG_RESET_VALUE);
+	/* Next word */
+	qConfigWordAddress++;
+    }
+}
+