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#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 */
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