diff options
Diffstat (limited to 'u-boot/board/evb64260/eth_addrtbl.c')
| -rw-r--r-- | u-boot/board/evb64260/eth_addrtbl.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/u-boot/board/evb64260/eth_addrtbl.c b/u-boot/board/evb64260/eth_addrtbl.c new file mode 100644 index 0000000..e8ef0e3 --- /dev/null +++ b/u-boot/board/evb64260/eth_addrtbl.c @@ -0,0 +1,221 @@ +#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); + + 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 */ |