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authorwdenk <wdenk>2002-11-03 00:24:07 +0000
committerwdenk <wdenk>2002-11-03 00:24:07 +0000
commitc609719b8d1b2dca590e0ed499016d041203e403 (patch)
tree7ea1755d80903ff972f312a249eb856061d40e15 /board/evb64260/eth_addrtbl.c
parent5b1d713721c3ea02549940133f09236783dda1f9 (diff)
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Initial revision
Diffstat (limited to 'board/evb64260/eth_addrtbl.c')
-rw-r--r--board/evb64260/eth_addrtbl.c225
1 files changed, 225 insertions, 0 deletions
diff --git a/board/evb64260/eth_addrtbl.c b/board/evb64260/eth_addrtbl.c
new file mode 100644
index 0000000..ea4925a
--- /dev/null
+++ b/board/evb64260/eth_addrtbl.c
@@ -0,0 +1,225 @@
+#include <common.h>
+#include <malloc.h>
+#include <galileo/gt64260R.h>
+#include <galileo/core.h>
+#include <asm/cache.h>
+#include "eth.h"
+#include "eth_addrtbl.h"
+
+#define TRUE 1
+#define FALSE 0
+
+#define PRINTF printf
+
+#ifdef CONFIG_GT_USE_MAC_HASH_TABLE
+
+static u32 addressTableHashMode[ GAL_ETH_DEVS ] = { 0, };
+static u32 addressTableHashSize[ GAL_ETH_DEVS ] = { 0, };
+static addrTblEntry *addressTableBase[ GAL_ETH_DEVS ] = { 0, };
+static void *realAddrTableBase[ GAL_ETH_DEVS ] = { 0, };
+
+static const u32 hashLength[ 2 ] = {
+ (0x8000), /* 8K * 4 entries */
+ (0x8000/16), /* 512 * 4 entries */
+};
+
+/* Initialize the address table for a port, if needed */
+unsigned int initAddressTable( u32 port, u32 hashMode, u32 hashSizeSelector)
+{
+ unsigned int tableBase;
+
+ if( port < 0 || port >= GAL_ETH_DEVS ) {
+ printf("%s: Invalid port number %d\n", __FUNCTION__, port );
+ return 0;
+ }
+
+ if (hashMode > 1) {
+ printf("%s: Invalid Hash Mode %d\n", __FUNCTION__, port );
+ return 0;
+ }
+
+ if ( realAddrTableBase[port] &&
+ ( addressTableHashSize[port] != hashSizeSelector )) {
+ /* we have been here before,
+ * but now we want a different sized table
+ */
+ free( realAddrTableBase[port] );
+ realAddrTableBase[port] = 0;
+ addressTableBase[port] = 0;
+
+ }
+
+ tableBase = (unsigned int)addressTableBase[port];
+ /* we get called for every probe, so only do this once */
+ if ( !tableBase ) {
+ int bytes = hashLength[hashSizeSelector] * sizeof(addrTblEntry);
+
+ tableBase = (unsigned int)realAddrTableBase[port] = malloc(bytes+64);
+
+ if(!tableBase)
+ {
+ printf("%s: alloc memory failed \n", __FUNCTION__);
+ return 0;
+ }
+
+ /* align to octal byte */
+ if(tableBase&63) tableBase=(tableBase+63) & ~63;
+
+ addressTableHashMode[port] = hashMode;
+ addressTableHashSize[port] = hashSizeSelector;
+ addressTableBase[port] = (addrTblEntry *)tableBase;
+
+ memset((void *)tableBase,0,bytes);
+ }
+
+ return tableBase;
+}
+
+/*
+ * ----------------------------------------------------------------------------
+ * This function will calculate the hash function of the address.
+ * depends on the hash mode and hash size.
+ * Inputs
+ * macH - the 2 most significant bytes of the MAC address.
+ * macL - the 4 least significant bytes of the MAC address.
+ * hashMode - hash mode 0 or hash mode 1.
+ * hashSizeSelector - indicates number of hash table entries (0=0x8000,1=0x800)
+ * Outputs
+ * return the calculated entry.
+ */
+u32
+hashTableFunction( u32 macH, u32 macL, u32 HashSize, u32 hash_mode)
+{
+ u32 hashResult;
+ u32 addrH;
+ u32 addrL;
+ u32 addr0;
+ u32 addr1;
+ u32 addr2;
+ u32 addr3;
+ u32 addrHSwapped;
+ u32 addrLSwapped;
+
+
+ addrH = NIBBLE_SWAPPING_16_BIT( macH );
+ addrL = NIBBLE_SWAPPING_32_BIT( macL );
+
+ addrHSwapped = FLIP_4_BITS( addrH & 0xf )
+ + ((FLIP_4_BITS( (addrH >> 4) & 0xf)) << 4)
+ + ((FLIP_4_BITS( (addrH >> 8) & 0xf)) << 8)
+ + ((FLIP_4_BITS( (addrH >> 12) & 0xf)) << 12);
+
+ addrLSwapped = FLIP_4_BITS( addrL & 0xf )
+ + ((FLIP_4_BITS( (addrL >> 4) & 0xf)) << 4)
+ + ((FLIP_4_BITS( (addrL >> 8) & 0xf)) << 8)
+ + ((FLIP_4_BITS( (addrL >> 12) & 0xf)) << 12)
+ + ((FLIP_4_BITS( (addrL >> 16) & 0xf)) << 16)
+ + ((FLIP_4_BITS( (addrL >> 20) & 0xf)) << 20)
+ + ((FLIP_4_BITS( (addrL >> 24) & 0xf)) << 24)
+ + ((FLIP_4_BITS( (addrL >> 28) & 0xf)) << 28);
+
+ addrH = addrHSwapped;
+ addrL = addrLSwapped;
+
+ if( hash_mode == 0 ) {
+ addr0 = (addrL >> 2) & 0x03f;
+ addr1 = (addrL & 0x003) | ((addrL >> 8) & 0x7f) << 2;
+ addr2 = (addrL >> 15) & 0x1ff;
+ addr3 = ((addrL >> 24) & 0x0ff) | ((addrH & 1) << 8);
+ } else {
+ addr0 = FLIP_6_BITS( addrL & 0x03f );
+ addr1 = FLIP_9_BITS( ((addrL >> 6) & 0x1ff));
+ addr2 = FLIP_9_BITS( (addrL >> 15) & 0x1ff);
+ addr3 = FLIP_9_BITS( (((addrL >> 24) & 0x0ff) | ((addrH & 0x1) << 8)));
+ }
+
+ hashResult = (addr0 << 9) | (addr1 ^ addr2 ^ addr3);
+
+ if( HashSize == _8K_TABLE ) {
+ hashResult = hashResult & 0xffff;
+ } else {
+ hashResult = hashResult & 0x07ff;
+ }
+
+ return( hashResult );
+}
+
+
+/*
+ * ----------------------------------------------------------------------------
+ * This function will add an entry to the address table.
+ * depends on the hash mode and hash size that was initialized.
+ * Inputs
+ * port - ETHERNET port number.
+ * macH - the 2 most significant bytes of the MAC address.
+ * macL - the 4 least significant bytes of the MAC address.
+ * skip - if 1, skip this address.
+ * rd - the RD field in the address table.
+ * Outputs
+ * address table entry is added.
+ * TRUE if success.
+ * FALSE if table full
+ */
+int
+addAddressTableEntry(
+ u32 port,
+ u32 macH,
+ u32 macL,
+ u32 rd,
+ u32 skip )
+{
+ addrTblEntry *entry;
+ u32 newHi;
+ u32 newLo;
+ u32 i;
+
+ newLo = (((macH >> 4) & 0xf) << 15)
+ | (((macH >> 0) & 0xf) << 11)
+ | (((macH >> 12) & 0xf) << 7)
+ | (((macH >> 8) & 0xf) << 3)
+ | (((macL >> 20) & 0x1) << 31)
+ | (((macL >> 16) & 0xf) << 27)
+ | (((macL >> 28) & 0xf) << 23)
+ | (((macL >> 24) & 0xf) << 19)
+ | (skip << SKIP_BIT) | (rd << 2) | VALID;
+
+ newHi = (((macL >> 4) & 0xf) << 15)
+ | (((macL >> 0) & 0xf) << 11)
+ | (((macL >> 12) & 0xf) << 7)
+ | (((macL >> 8) & 0xf) << 3)
+ | (((macL >> 21) & 0x7) << 0);
+
+ /*
+ * Pick the appropriate table, start scanning for free/reusable
+ * entries at the index obtained by hashing the specified MAC address
+ */
+ entry = addressTableBase[port];
+ entry += hashTableFunction( macH, macL, addressTableHashSize[port],
+ addressTableHashMode[port] );
+ for( i = 0; i < HOP_NUMBER; i++, entry++ ) {
+ if( !(entry->lo & VALID) /*|| (entry->lo & SKIP)*/ ) {
+ break;
+ } else { /* if same address put in same position */
+ if( ((entry->lo & 0xfffffff8) == (newLo & 0xfffffff8))
+ && (entry->hi == newHi) )
+ {
+ break;
+ }
+ }
+ }
+
+ if( i == HOP_NUMBER ) {
+ PRINTF( "addGT64260addressTableEntry: table section is full\n" );
+ return( FALSE );
+ }
+
+ /*
+ * Update the selected entry
+ */
+ entry->hi = newHi;
+ entry->lo = newLo;
+ DCACHE_FLUSH_N_SYNC( (u32)entry, MAC_ENTRY_SIZE );
+ return( TRUE );
+}
+
+#endif /* CONFIG_GT_USE_MAC_HASH_TABLE */