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/***********************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**************************************/
/**
* @file
*
* Interface to Core, IO and DDR Clock.
*
* <hr>$Revision: 45089 $<hr>
*
* @addtogroup hal
* @{
*/
#define BDK_GTI_RATE 100000000ull
/**
* Enumeration of different Clocks.
*/
typedef enum{
BDK_CLOCK_TIME, /**< Clock for telling time with fast access. Uses GTI in core */
BDK_CLOCK_MAIN_REF, /**< Main reference clock */
BDK_CLOCK_RCLK, /**< Clock used by cores, coherent bus and L2 cache. */
BDK_CLOCK_SCLK, /**< Clock used by IO blocks. */
} bdk_clock_t;
/**
* Called in __bdk_init to setup the global timer
*/
extern void bdk_clock_setup();
/**
* Get cycle count based on the clock type.
*
* @param clock - Enumeration of the clock type.
* @return - Get the number of cycles executed so far.
*/
static inline uint64_t bdk_clock_get_count(bdk_clock_t clock) __attribute__ ((always_inline));
static inline uint64_t bdk_clock_get_count(bdk_clock_t clock)
{
extern uint64_t __bdk_clock_get_count_slow(bdk_clock_t clock);
if (clock == BDK_CLOCK_TIME)
{
uint64_t clk;
BDK_MRS(CNTPCT_EL0, clk);
return clk;
}
else
return __bdk_clock_get_count_slow(clock);
}
/**
* Get clock rate based on the clock type.
*
* @param node Node to use in a Numa setup. Can be an exact ID or a special value.
* @param clock - Enumeration of the clock type.
* @return - return the clock rate.
*/
static inline uint64_t bdk_clock_get_rate(bdk_node_t node, bdk_clock_t clock) __attribute__ ((always_inline, pure));
static inline uint64_t bdk_clock_get_rate(bdk_node_t node, bdk_clock_t clock)
{
extern uint64_t __bdk_clock_get_rate_slow(bdk_node_t node, bdk_clock_t clock) __attribute__ ((pure));
if (clock == BDK_CLOCK_TIME)
return BDK_GTI_RATE; /* Programed as part of setup */
else
return __bdk_clock_get_rate_slow(node, clock);
}
/** @} */
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