1 files changed, 218 insertions, 0 deletions
diff --git a/board/evb64260/eth_addrtbl.c b/board/evb64260/eth_addrtbl.c
new file mode 100644
index 0000000..8c2c17f
--- /dev/null
+++ b/board/evb64260/eth_addrtbl.c
@@ -0,0 +1,218 @@
+#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 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);
+
+		realAddrTableBase[port] =
+			malloc (bytes + 64);
+		tableBase = (unsigned int)realAddrTableBase;
+
+		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 */