xref: /freebsd-11-stable/sys/contrib/octeon-sdk/cvmx-tlb.h

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#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