X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=src%2F5gnrmac%2Flwr_mac_util.c;h=0fd3358befb12862b5b982bd9b6f363f32b936db;hb=e54c2aae19e97065def9e5ab2d1488477b1ea209;hp=33403ef7d7df0b1d03361e7704933ac160d562e2;hpb=451e626d5ac7c7e7586bab23358161230449af46;p=o-du%2Fl2.git

diff --git a/src/5gnrmac/lwr_mac_util.c b/src/5gnrmac/lwr_mac_util.c
index 33403ef7d..0fd3358be 100644
--- a/src/5gnrmac/lwr_mac_util.c
+++ b/src/5gnrmac/lwr_mac_util.c
@@ -18,12 +18,7 @@
 
 /* This file contains all utility functions for MAC CL */
 
-#include "stdio.h"
-#include "envdep.h"
-#include "gen.h"
-#include "gen.x"
-#include "cm_hash.h"
-#include "cm_hash.x"
+#include "common_def.h"
 #include "lwr_mac.h"
 
  /*******************************************************************
@@ -42,24 +37,157 @@
   *         NULLP - failure
   *
   * ****************************************************************/
-PUBLIC ClCellCb * rgClUtlGetCellCb
+LwrMacCellCb * lwrMacGetCellCb
 (
-   U16 cellId
+   uint16_t cellId
 )
 {
-   ClCellCb *cellCb;
+   LwrMacCellCb *cellCb;
 
-   if(cellId >= MAX_NUM_CELL_SUPP)
+   if(cellId >= MAX_NUM_CELL)
    {
-      printf("\n Invalid Cell Id [%d]. rgClUtlGetCellCb failed.", cellId);
-      RETVALUE(NULLP);
+      DU_LOG("\nERROR  -->  Invalid Cell Id [%d]. rgClUtlGetCellCb failed.", cellId);
+      return NULLP;
    }
-
-   cmHashListFind((CmHashListCp *)&clGlobalCp.cellCbLst, (U8 *)&cellId, sizeof(U16), 0, (PTR *)&cellCb);
    
-   RETVALUE(cellCb);
+   cellCb = &lwrMacCb.cellCb[cellId -1];
+
+   return cellCb;
+}
+
+/*******************************************************************
+ *
+ * @brief Reverses bits in a number
+ *
+ * @details
+ *
+ *    Function : reverseBits
+ *
+ *    Functionality:
+ *      Reverses bits in a number
+ *
+ * @params[in] Number to be reversed
+ *             Number of bits to be reversed
+ * @return Reversed number
+ *
+ * ****************************************************************/
+uint32_t reverseBits(uint32_t num, uint8_t numBits)
+{
+   uint32_t reverse_num = 0;
+   uint8_t bitIdx;
+   for (bitIdx = 0; bitIdx < numBits; bitIdx++)
+   {
+      if((num & (1 << bitIdx)))
+	 reverse_num |= 1 << ((numBits - 1) - bitIdx);
+   }
+   return reverse_num;
+}
+
+/*******************************************************************
+ *
+ * @brief Fills DL DCI payload byte by byte
+ *
+ * @details
+ *
+ *    Function : fillDlDciPayload
+ *
+ *    Functionality:
+ *      Fills DL DCI payload byte by byte
+ *
+ * @params[in] Payload buffer pointer
+ *             Current Byte position in buffer
+ *             Current Bit Position in current byte
+ *             Value to be filled
+ *             Number of bits in value
+ * @return void
+ *
+ * ****************************************************************/
+
+void fillDlDciPayload(uint8_t *buf, uint8_t *bytePos, uint8_t *bitPos,\
+      uint32_t val, uint8_t valSize)
+{
+   uint8_t temp;
+   uint8_t bytePart1;
+   uint32_t bytePart2;
+   uint8_t bytePart1Size;
+   uint8_t bytePart2Size;
+
+   if(*bitPos + valSize <= 8)
+   {
+      bytePart1 = (uint8_t)val;
+      bytePart1 = (~((~0) << valSize)) & bytePart1;
+      buf[*bytePos] |= bytePart1;
+      *bitPos += valSize;
+   }
+   else if(*bitPos + valSize > 8)
+   {
+      temp = (uint8_t)val;
+      bytePart1Size = 8 - *bitPos;
+      bytePart2Size = valSize - bytePart1Size;
+
+      bytePart1 = ((~((~0) << bytePart1Size)) & temp) << *bitPos;
+      bytePart2 = val >> bytePart1Size;
+
+      buf[*bytePos] |= bytePart1;
+      (*bytePos)--;
+      *bitPos = 0;
+      fillDlDciPayload(buf, bytePos, bitPos, bytePart2, bytePart2Size);
+   }
+}
+
+/*
+ * As per FAPI spec, 
+ * Frequency domain resources is a bitmap defining non-overlapping groups of 6 PRBs in ascending order.
+ * [TS38.213 10.1]. Bitmap of uint8 array. 45 bits.
+ *
+ * As per IAPI,
+ * CORESET-freqdom.frequencyDomainResources : The bits of the bitmap have a one-to-one mapping with
+ * non-overlapping groups of 6 RBs. The most significant bit of the first word corresponds to
+ * the most significant bit defined in 38.331.
+ *
+ * FAPI and IAPI both are 45 bits. Mapped from bit 0 LS Byte for the FAPI and
+ * bit 0 LS U32 entry for IAPI.
+ * FAPI is to be filled in following format such that Intel L1 is able to decode it :
+ *
+ *            FAPI                                 IAPI 
+ * FreqDomainResource[0] bits 7-0     ->    nFreqDomain[0] bits 7-0
+ * FreqDomainResource[1] bits 7-0     ->    nFreqDomain[0] bits 15-8
+ * FreqDomainResource[2] bits 7-0     ->    nFreqDomain[0] bits 23-16
+ * FreqDomainResource[3] bits 7-0     ->    nFreqDomain[0] bits 31-24
+ * FreqDomainResource[4] bits 7-0     ->    nFreqDomain[1] bits 7-0
+ * FreqDomainResource[5] bits 7-0     ->    nFreqDomain[1] bits 15-8
+ *
+ * where for the last entry bits 7,6 and 5 are don't care in the FAPI and bits
+ * 31-13 are don't care in the IAPI.
+ */
+void convertFreqDomRsrcMapToIAPIFormat(uint8_t *sourceBitMap, uint8_t *destBitMap)
+{
+   int8_t  idx;
+   uint8_t  numBitsToShift = 0;
+   uint64_t freqDomainResources = 0;
+
+   /* Bit operation to create a 64-bit integer that has
+    * 48 LSBs [Bit 47 to Bit 0] mapped to sourceBitMap[0] to sourceBitMap[5]
+    */
+   for(idx = FREQ_DOM_RSRC_SIZE-1; idx >=0; idx--)
+   {
+      freqDomainResources |= ((uint64_t)sourceBitMap[idx] << numBitsToShift);
+      numBitsToShift += 8;
+   }
+
+   /* Right shift 3 bits because bits[2-0] are unused in sourceBitMap[5] */
+   freqDomainResources = freqDomainResources >> 3;
+
+   /* Filling destBitMap such that LSB bit 0 of freqDomainResources maps to LSB 
+    * of first word of destBitMap */
+   numBitsToShift = 0;
+   for(idx=0; idx<FREQ_DOM_RSRC_SIZE; idx++)
+   {
+      destBitMap[idx] = freqDomainResources >> numBitsToShift;
+      numBitsToShift += 8;
+   }
 }
 
 /**********************************************************************
-         End of file
-**********************************************************************/
+  End of file
+ **********************************************************************/