392 lines
12 KiB
C
392 lines
12 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Inc. (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Inc. nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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/**
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* @file
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*
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* interface to the low latency DRAM
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*
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* <hr>$Revision: 70030 $<hr>
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*
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*/
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#ifndef __CVMX_LLM_H__
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#define __CVMX_LLM_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ENABLE_DEPRECATED /* Set to enable the old 18/36 bit names */
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typedef enum
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{
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CVMX_LLM_REPLICATION_NONE = 0,
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CVMX_LLM_REPLICATION_2X = 1, // on both interfaces, or 2x if only one interface
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CVMX_LLM_REPLICATION_4X = 2, // both interfaces, 2x, or 4x if only one interface
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CVMX_LLM_REPLICATION_8X = 3, // both interfaces, 4x, or 8x if only one interface
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} cvmx_llm_replication_t;
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/**
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* This structure defines the address used to the low-latency memory.
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* This address format is used for both loads and stores.
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*/
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typedef union
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{
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uint64_t u64;
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struct
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{
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uint64_t mbz :30;
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cvmx_llm_replication_t repl : 2;
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uint64_t address :32; // address<1:0> mbz, address<31:30> mbz
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} s;
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} cvmx_llm_address_t;
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/**
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* This structure defines the data format in the low-latency memory
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*/
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typedef union
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{
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uint64_t u64;
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/**
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* this format defines the format returned on a load
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* a load returns the 32/36-bits in memory, plus xxor = even_parity(dat<35:0>)
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* typically, dat<35> = parity(dat<34:0>), so the xor bit directly indicates parity error
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* Note that the data field size is 36 bits on the 36XX/38XX, and 32 bits on the 31XX
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*/
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struct
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{
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uint64_t mbz1 :27;
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uint64_t xxor : 1;
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uint64_t mbz : 4;
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uint64_t dat :32;
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} cn31xx;
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struct
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{
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uint64_t mbz :27;
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uint64_t xxor : 1;
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uint64_t dat :36;
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} s;
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/**
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* This format defines what should be used if parity is desired. Hardware returns
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* the XOR of all the bits in the 36/32 bit data word, so for parity software must use
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* one of the data field bits as a parity bit.
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*/
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struct cn31xx_par_struct
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{
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uint64_t mbz :32;
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uint64_t par : 1;
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uint64_t dat :31;
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} cn31xx_par;
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struct cn38xx_par_struct
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{
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uint64_t mbz :28;
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uint64_t par : 1;
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uint64_t dat :35;
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} cn38xx_par;
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#if !OCTEON_IS_COMMON_BINARY()
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#if CVMX_COMPILED_FOR(OCTEON_CN31XX)
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struct cn31xx_par_struct spar;
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#else
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struct cn38xx_par_struct spar;
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#endif
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#endif
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} cvmx_llm_data_t;
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#define CVMX_LLM_NARROW_DATA_WIDTH ((CVMX_COMPILED_FOR(OCTEON_CN31XX)) ? 32 : 36)
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/**
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* Calculate the parity value of a number
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*
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* @param value
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* @return parity value
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*/
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static inline uint64_t cvmx_llm_parity(uint64_t value)
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{
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uint64_t result;
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CVMX_DPOP(result, value);
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return result;
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}
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/**
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* Calculate the ECC needed for 36b LLM mode
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*
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* @param value
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* @return ECC value
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*/
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static inline int cvmx_llm_ecc(uint64_t value)
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{
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/* FIXME: This needs a re-write */
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static const uint32_t ecc_code_29[7] = {
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0x08962595,
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0x112a4aaa,
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0x024c934f,
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0x04711c73,
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0x0781e07c,
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0x1801ff80,
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0x1ffe0000};
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uint64_t pop0, pop1, pop2, pop3, pop4, pop5, pop6;
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pop0 = ecc_code_29[0];
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pop1 = ecc_code_29[1];
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pop2 = ecc_code_29[2];
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pop0 &= value;
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pop3 = ecc_code_29[3];
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CVMX_DPOP(pop0, pop0);
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pop4 = ecc_code_29[4];
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pop1 &= value;
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CVMX_DPOP(pop1, pop1);
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pop2 &= value;
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pop5 = ecc_code_29[5];
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CVMX_DPOP(pop2, pop2);
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pop6 = ecc_code_29[6];
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pop3 &= value;
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CVMX_DPOP(pop3, pop3);
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pop4 &= value;
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CVMX_DPOP(pop4, pop4);
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pop5 &= value;
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CVMX_DPOP(pop5, pop5);
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pop6 &= value;
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CVMX_DPOP(pop6, pop6);
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return((pop6&1)<<6) | ((pop5&1)<<5) | ((pop4&1)<<4) | ((pop3&1)<<3) | ((pop2&1)<<2) | ((pop1&1)<<1) | (pop0&1);
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}
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#ifdef ENABLE_DEPRECATED
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/* These macros are provided to provide compatibility with code that uses
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** the old names for the llm access functions. The names were changed
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** when support for the 31XX llm was added, as the widths differ between Octeon Models.
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** The wide/narrow names are preferred, and should be used in all new code */
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#define cvmx_llm_write36 cvmx_llm_write_narrow
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#define cvmx_llm_read36 cvmx_llm_read_narrow
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#define cvmx_llm_write64 cvmx_llm_write_wide
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#define cvmx_llm_read64 cvmx_llm_read_wide
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#endif
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/**
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* Write to LLM memory - 36 bit
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*
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* @param address Address in LLM to write. Consecutive writes increment the
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* address by 4. The replication mode is also encoded in this
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* address.
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* @param value Value to write to LLM. Only the low 36 bits will be used.
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* @param set Which of the two coprocessor 2 register sets to use for the
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* write. May be used to get two outstanding LLM access at once
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* per core. Range: 0-1
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*/
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static inline void cvmx_llm_write_narrow(cvmx_llm_address_t address, uint64_t value, int set)
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{
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cvmx_llm_data_t data;
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data.s.mbz = 0;
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data.s.dat = value;
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data.s.xxor = 0;
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if (set)
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{
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CVMX_MT_LLM_DATA(1, data.u64);
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CVMX_MT_LLM_WRITE_ADDR_INTERNAL(1, address.u64);
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}
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else
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{
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CVMX_MT_LLM_DATA(0, data.u64);
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CVMX_MT_LLM_WRITE_ADDR_INTERNAL(0, address.u64);
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}
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}
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/**
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* Write to LLM memory - 64 bit
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*
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* @param address Address in LLM to write. Consecutive writes increment the
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* address by 8. The replication mode is also encoded in this
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* address.
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* @param value Value to write to LLM.
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* @param set Which of the two coprocessor 2 register sets to use for the
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* write. May be used to get two outstanding LLM access at once
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* per core. Range: 0-1
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*/
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static inline void cvmx_llm_write_wide(cvmx_llm_address_t address, uint64_t value, int set)
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{
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if (set)
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{
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CVMX_MT_LLM_DATA(1, value);
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CVMX_MT_LLM_WRITE64_ADDR_INTERNAL(1, address.u64);
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}
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else
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{
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CVMX_MT_LLM_DATA(0, value);
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CVMX_MT_LLM_WRITE64_ADDR_INTERNAL(0, address.u64);
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}
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}
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/**
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* Read from LLM memory - 36 bit
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*
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* @param address Address in LLM to read. Consecutive reads increment the
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* address by 4. The replication mode is also encoded in this
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* address.
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* @param set Which of the two coprocessor 2 register sets to use for the
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* write. May be used to get two outstanding LLM access at once
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* per core. Range: 0-1
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* @return The lower 36 bits contain the result of the read
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*/
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static inline cvmx_llm_data_t cvmx_llm_read_narrow(cvmx_llm_address_t address, int set)
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{
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cvmx_llm_data_t value;
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if (set)
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{
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CVMX_MT_LLM_READ_ADDR(1, address.u64);
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CVMX_MF_LLM_DATA(1, value.u64);
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}
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else
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{
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CVMX_MT_LLM_READ_ADDR(0, address.u64);
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CVMX_MF_LLM_DATA(0, value.u64);
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}
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return value;
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}
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/**
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* Read from LLM memory - 64 bit
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*
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* @param address Address in LLM to read. Consecutive reads increment the
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* address by 8. The replication mode is also encoded in this
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* address.
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* @param set Which of the two coprocessor 2 register sets to use for the
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* write. May be used to get two outstanding LLM access at once
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* per core. Range: 0-1
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* @return The result of the read
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*/
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static inline uint64_t cvmx_llm_read_wide(cvmx_llm_address_t address, int set)
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{
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uint64_t value;
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if (set)
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{
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CVMX_MT_LLM_READ64_ADDR(1, address);
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CVMX_MF_LLM_DATA(1, value);
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}
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else
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{
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CVMX_MT_LLM_READ64_ADDR(0, address);
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CVMX_MF_LLM_DATA(0, value);
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}
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return value;
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}
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#define RLD_INIT_DELAY (1<<18)
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/* This structure describes the RLDRAM configuration for a board. This structure
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** must be populated with the correct values and passed to the initialization function.
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*/
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typedef struct
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{
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uint32_t cpu_hz; /* CPU frequency in Hz */
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char addr_rld0_fb_str [100]; /* String describing RLDRAM connections on rld 0 front (0) bunk*/
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char addr_rld0_bb_str [100]; /* String describing RLDRAM connections on rld 0 back (1) bunk*/
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char addr_rld1_fb_str [100]; /* String describing RLDRAM connections on rld 1 front (0) bunk*/
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char addr_rld1_bb_str [100]; /* String describing RLDRAM connections on rld 1 back (1) bunk*/
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uint8_t rld0_bunks; /* Number of bunks on rld 0 (0 is disabled) */
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uint8_t rld1_bunks; /* Number of bunks on rld 1 (0 is disabled) */
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uint16_t rld0_mbytes; /* mbytes on rld 0 */
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uint16_t rld1_mbytes; /* mbytes on rld 1 */
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uint16_t max_rld_clock_mhz; /* Maximum RLD clock in MHz, only used for CN58XX */
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} llm_descriptor_t;
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/**
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* Initialize LLM memory controller. This must be done
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* before the low latency memory can be used.
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* This is simply a wrapper around cvmx_llm_initialize_desc(),
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* and is deprecated.
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*
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* @return -1 on error
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* 0 on success
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*/
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int cvmx_llm_initialize(void);
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/**
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* Initialize LLM memory controller. This must be done
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* before the low latency memory can be used.
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*
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* @param llm_desc_ptr
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* Pointer to descriptor structure. If NULL
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* is passed, a default setting is used if available.
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*
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* @return -1 on error
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* Size of llm in bytes on success
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*/
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int cvmx_llm_initialize_desc(llm_descriptor_t *llm_desc_ptr);
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/**
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* Gets the default llm descriptor for the board code is being run on.
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*
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* @param llm_desc_ptr
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* Pointer to descriptor structure to be filled in. Contents are only
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* valid after successful completion. Must not be NULL.
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*
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* @return -1 on error
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* 0 on success
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*/
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int cvmx_llm_get_default_descriptor(llm_descriptor_t *llm_desc_ptr);
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#ifdef __cplusplus
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}
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#endif
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#endif /* __CVM_LLM_H__ */
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