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/***********************license start***************
* Copyright (c) 2003-2010 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**************************************/
#ifndef __CVMX_TLB_H__
#define __CVMX_TLB_H__
/**
* @file
*
* cvmx-tlb provides access functions for setting up TLB entries for simple
* executive applications.
*
* <hr>$Revision: 41586 $<hr>
*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* Find a free entry that can be used for share memory mapping.
*
* @return -1: no free entry found
* @return : a free entry
*/
int cvmx_tlb_allocate_runtime_entry(void);
/**
* Invalidate the TLB entry. Remove previous mapping if one was set up
* @param tlbi
*/
void cvmx_tlb_free_runtime_entry(uint32_t tlbi);
/**
* Debug routine to show all shared memory mapping
*/
void cvmx_tlb_dump_shared_mapping(void);
/**
* Program a single TLB entry to enable the provided vaddr to paddr mapping.
*
* @param index Index of the TLB entry
* @param vaddr The virtual address for this mapping
* @param paddr The physical address for this mapping
* @param size Size of the mapping
* @param tlb_flags Entry mapping flags
*/
void cvmx_tlb_write_entry(int index, uint64_t vaddr, uint64_t paddr,
uint64_t size, uint64_t tlb_flags);
/**
* Program a single TLB entry to enable the provided vaddr to paddr mapping.
* This version adds a wired entry that should not be changed at run time
*
* @param index Index of the TLB entry
* @param vaddr The virtual address for this mapping
* @param paddr The physical address for this mapping
* @param size Size of the mapping
* @param tlb_flags Entry mapping flags
* @return -1: TLB out of entries
* 0: fixed entry added
*
*/
int cvmx_tlb_add_fixed_entry(uint64_t vaddr, uint64_t paddr,
uint64_t size, uint64_t tlb_flags);
/**
* Program a single TLB entry to enable the provided vaddr to paddr mapping.
* This version writes a runtime entry. It will check the index to make sure
* not to overwrite any fixed entries.
*
* @param index Index of the TLB entry
* @param vaddr The virtual address for this mapping
* @param paddr The physical address for this mapping
* @param size Size of the mapping
* @param tlb_flags Entry mapping flags
*/
void cvmx_tlb_write_runtime_entry(int index, uint64_t vaddr, uint64_t paddr,
uint64_t size, uint64_t tlb_flags);
/**
* Find the TLB index of a given virtual address
*
* @param vaddr The virtual address to look up
* @return -1 not TLB mapped
* >=0 TLB TLB index
*/
int cvmx_tlb_lookup(uint64_t vaddr);
/**
* Debug routine to show all TLB entries of this core
*
*/
void cvmx_tlb_dump_all(void);
/*
* @INTERNAL
* return the next power of two value for the given input <v>
*
* @param v input value
* @return next power of two value for v
*/
static inline uint64_t __upper_power_of_two(uint64_t v)
{
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
v |= v >> 32;
v++;
return v;
}
/**
* @INTERNAL
* Check if the given value 'v' is power of two.
*
* @param v input value
* @return 1 yes
* 0 no
*/
static inline int __is_power_of_two(uint64_t v)
{
int num_of_1s = 0;
CVMX_DPOP(num_of_1s, v);
return (num_of_1s == 1 );
}
#ifdef __cplusplus
}
#endif
#endif
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