diff options
Diffstat (limited to 'src/vendorcode/cavium/bdk/libbdk-dram/bdk-dram-address.c')
| -rw-r--r-- | src/vendorcode/cavium/bdk/libbdk-dram/bdk-dram-address.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/src/vendorcode/cavium/bdk/libbdk-dram/bdk-dram-address.c b/src/vendorcode/cavium/bdk/libbdk-dram/bdk-dram-address.c new file mode 100644 index 0000000000..94d7d76752 --- /dev/null +++ b/src/vendorcode/cavium/bdk/libbdk-dram/bdk-dram-address.c @@ -0,0 +1,183 @@ +/***********************license start*********************************** +* Copyright (c) 2003-2017 Cavium Inc. (support@cavium.com). All rights +* reserved. +* +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are +* met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* * Redistributions in binary form must reproduce the above +* copyright notice, this list of conditions and the following +* disclaimer in the documentation and/or other materials provided +* with the distribution. +* +* * Neither the name of Cavium Inc. nor the names of +* its contributors may be used to endorse or promote products +* derived from this software without specific prior written +* permission. +* +* This Software, including technical data, may be subject to U.S. export +* control laws, including the U.S. Export Administration Act and its +* associated regulations, and may be subject to export or import +* regulations in other countries. +* +* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS" +* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR +* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT +* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY +* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT +* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES +* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR +* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, +* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK +* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU. +***********************license end**************************************/ +#include <bdk.h> +#include "libbdk-arch/bdk-csrs-l2c.h" + +#define EXTRACT(v, lsb, width) (((v) >> (lsb)) & ((1ull << (width)) - 1)) +#define INSERT(a, v, lsb, width) a|=(((v) & ((1ull << (width)) - 1)) << (lsb)) + +/** + * Given a physical DRAM address, extract information about the node, LMC, DIMM, + * prank, lrank, bank, row, and column that was accessed. + * + * @param address Physical address to decode + * @param node Node the address was for + * @param lmc LMC controller the address was for + * @param dimm DIMM the address was for + * @param prank Physical RANK on the DIMM + * @param lrank Logical RANK on the DIMM + * @param bank BANK on the DIMM + * @param row Row on the DIMM + * @param col Column on the DIMM + */ +void +bdk_dram_address_extract_info(uint64_t address, int *node, int *lmc, int *dimm, + int *prank, int *lrank, int *bank, int *row, int *col) +{ + int bitno = CAVIUM_IS_MODEL(CAVIUM_CN83XX) ? 19 : 20; + *node = EXTRACT(address, 40, 2); /* Address bits [41:40] */ + /* Determine the LMC controller */ + BDK_CSR_INIT(l2c_ctl, *node, BDK_L2C_CTL); + int bank_lsb, xbits; + + /* xbits depends on number of LMCs */ + xbits = __bdk_dram_get_num_lmc(*node) >> 1; // 4->2; 2->1; 1->0 + bank_lsb = 7 + xbits; + + /* LMC number is probably aliased */ + if (l2c_ctl.s.disidxalias) + *lmc = EXTRACT(address, 7, xbits); + else + *lmc = EXTRACT(address, 7, xbits) ^ EXTRACT(address, bitno, xbits) ^ EXTRACT(address, 12, xbits); + + /* Figure out the bank field width */ + BDK_CSR_INIT(lmcx_config, *node, BDK_LMCX_CONFIG(*lmc)); + int bank_width = __bdk_dram_get_num_bank_bits(*node, *lmc); + + /* Extract additional info from the LMC_CONFIG CSR */ + BDK_CSR_INIT(ext_config, *node, BDK_LMCX_EXT_CONFIG(*lmc)); + int dimm_lsb = 28 + lmcx_config.s.pbank_lsb + xbits; + int dimm_width = 40 - dimm_lsb; + int prank_lsb = dimm_lsb - lmcx_config.s.rank_ena; + int prank_width = dimm_lsb - prank_lsb; + int lrank_lsb = prank_lsb - ext_config.s.dimm0_cid; + int lrank_width = prank_lsb - lrank_lsb; + int row_lsb = 14 + lmcx_config.s.row_lsb + xbits; + int row_width = lrank_lsb - row_lsb; + int col_hi_lsb = bank_lsb + bank_width; + int col_hi_width= row_lsb - col_hi_lsb; + + /* Extract the parts of the address */ + *dimm = EXTRACT(address, dimm_lsb, dimm_width); + *prank = EXTRACT(address, prank_lsb, prank_width); + *lrank = EXTRACT(address, lrank_lsb, lrank_width); + *row = EXTRACT(address, row_lsb, row_width); + + /* bank calculation may be aliased... */ + BDK_CSR_INIT(lmcx_control, *node, BDK_LMCX_CONTROL(*lmc)); + if (lmcx_control.s.xor_bank) + *bank = EXTRACT(address, bank_lsb, bank_width) ^ EXTRACT(address, 12 + xbits, bank_width); + else + *bank = EXTRACT(address, bank_lsb, bank_width); + + /* LMC number already extracted */ + int col_hi = EXTRACT(address, col_hi_lsb, col_hi_width); + *col = EXTRACT(address, 3, 4) | (col_hi << 4); + /* Bus byte is address bits [2:0]. Unused here */ +} + +/** + * Construct a physical address given the node, LMC, DIMM, prank, lrank, bank, row, and column. + * + * @param node Node the address was for + * @param lmc LMC controller the address was for + * @param dimm DIMM the address was for + * @param prank Physical RANK on the DIMM + * @param lrank Logical RANK on the DIMM + * @param bank BANK on the DIMM + * @param row Row on the DIMM + * @param col Column on the DIMM + */ +uint64_t +bdk_dram_address_construct_info(bdk_node_t node, int lmc, int dimm, + int prank, int lrank, int bank, int row, int col) + +{ + uint64_t address = 0; + int bitno = CAVIUM_IS_MODEL(CAVIUM_CN83XX) ? 19 : 20; + + // insert node bits + INSERT(address, node, 40, 2); /* Address bits [41:40] */ + + /* xbits depends on number of LMCs */ + int xbits = __bdk_dram_get_num_lmc(node) >> 1; // 4->2; 2->1; 1->0 + int bank_lsb = 7 + xbits; + + /* Figure out the bank field width */ + int bank_width = __bdk_dram_get_num_bank_bits(node, lmc); + + /* Extract additional info from the LMC_CONFIG CSR */ + BDK_CSR_INIT(lmcx_config, node, BDK_LMCX_CONFIG(lmc)); + BDK_CSR_INIT(ext_config, node, BDK_LMCX_EXT_CONFIG(lmc)); + int dimm_lsb = 28 + lmcx_config.s.pbank_lsb + xbits; + int dimm_width = 40 - dimm_lsb; + int prank_lsb = dimm_lsb - lmcx_config.s.rank_ena; + int prank_width = dimm_lsb - prank_lsb; + int lrank_lsb = prank_lsb - ext_config.s.dimm0_cid; + int lrank_width = prank_lsb - lrank_lsb; + int row_lsb = 14 + lmcx_config.s.row_lsb + xbits; + int row_width = lrank_lsb - row_lsb; + int col_hi_lsb = bank_lsb + bank_width; + int col_hi_width = row_lsb - col_hi_lsb; + + /* Insert some other parts of the address */ + INSERT(address, dimm, dimm_lsb, dimm_width); + INSERT(address, prank, prank_lsb, prank_width); + INSERT(address, lrank, lrank_lsb, lrank_width); + INSERT(address, row, row_lsb, row_width); + INSERT(address, col >> 4, col_hi_lsb, col_hi_width); + INSERT(address, col, 3, 4); + + /* bank calculation may be aliased... */ + BDK_CSR_INIT(lmcx_control, node, BDK_LMCX_CONTROL(lmc)); + int new_bank = bank; + if (lmcx_control.s.xor_bank) + new_bank ^= EXTRACT(address, 12 + xbits, bank_width); + INSERT(address, new_bank, bank_lsb, bank_width); + + /* Determine the actual C bits from the input LMC controller arg */ + /* The input LMC number was probably aliased with other fields */ + BDK_CSR_INIT(l2c_ctl, node, BDK_L2C_CTL); + int new_lmc = lmc; + if (!l2c_ctl.s.disidxalias) + new_lmc ^= EXTRACT(address, bitno, xbits) ^ EXTRACT(address, 12, xbits); + INSERT(address, new_lmc, 7, xbits); + + return address; +} |