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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**************************************/
/**
* @file
* Small utility functions and macros to ease programming of Octeon.
*
* <hr>$Revision: 38306 $<hr>
*/
#ifndef __CVMX_UTILS_H__
#define __CVMX_UTILS_H__
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include <stdarg.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef TRUE
#define FALSE 0
#define TRUE (!(FALSE))
#endif
/*
* The macros cvmx_likely and cvmx_unlikely use the
* __builtin_expect GCC operation to control branch
* probabilities for a conditional. For example, an "if"
* statement in the code that will almost always be
* executed should be written as "if (cvmx_likely(...))".
* If the "else" section of an if statement is more
* probable, use "if (cvmx_unlikey(...))".
*/
#define cvmx_likely(x) __builtin_expect(!!(x), 1)
#define cvmx_unlikely(x) __builtin_expect(!!(x), 0)
#if CVMX_ENABLE_DEBUG_PRINTS
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#define cvmx_dprintf printk
#define cvmx_dvprintf vprintk
#else
#define cvmx_dprintf printf
#define cvmx_dvprintf vprintf
#endif
#else
static inline void cvmx_dvprintf(const char *format, va_list ap)
{
/* Prints are disbled, do nothing */
}
static inline void cvmx_dprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2)));
static inline void cvmx_dprintf(const char *format, ...)
{
/* Prints are disbled, do nothing */
}
#endif
#define CAST64(v) ((long long)(long)(v)) // use only when 'v' is a pointer
#define CASTPTR(type, v) ((type *)(long)(v))
#define CVMX_CACHE_LINE_SIZE (128) // In bytes
#define CVMX_CACHE_LINE_MASK (CVMX_CACHE_LINE_SIZE - 1) // In bytes
#define CVMX_CACHE_LINE_ALIGNED __attribute__ ((aligned (CVMX_CACHE_LINE_SIZE)))
/**
* This macro spins on a field waiting for it to reach a value. It
* is common in code to need to wait for a specific field in a CSR
* to match a specific value. Conceptually this macro expands to:
*
* 1) read csr at "address" with a csr typedef of "type"
* 2) Check if ("type".s."field" "op" "value")
* 3) If #2 isn't true loop to #1 unless too much time has passed.
*/
#define CVMX_WAIT_FOR_FIELD64(address, type, field, op, value, timeout_usec)\
({int result; \
do { \
uint64_t done = cvmx_clock_get_count(CVMX_CLOCK_CORE) + (uint64_t)timeout_usec * \
cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000000; \
type c; \
while (1) \
{ \
c.u64 = cvmx_read_csr(address); \
if ((c.s.field) op (value)) { \
result = 0; \
break; \
} else if (cvmx_clock_get_count(CVMX_CLOCK_CORE) > done) { \
result = -1; \
break; \
} else \
cvmx_wait(100); \
} \
} while (0); \
result;})
#define CVMX_BUILD_ASSERT_ZERO(e) (sizeof(struct {int __static_assert:(e)?1:-1;}))
#define CVMX_BUILD_ASSERT(condition) ((void)CVMX_BUILD_ASSERT_ZERO(condition))
/**
* Builds a bit mask given the required size in bits.
*
* @param bits Number of bits in the mask
* @return The mask
*/
static inline uint64_t cvmx_build_mask(uint64_t bits)
{
return ~((~0x0ull) << bits);
}
/**
* Builds a memory address for I/O based on the Major and Sub DID.
*
* @param major_did 5 bit major did
* @param sub_did 3 bit sub did
* @return I/O base address
*/
static inline uint64_t cvmx_build_io_address(uint64_t major_did, uint64_t sub_did)
{
return ((0x1ull << 48) | (major_did << 43) | (sub_did << 40));
}
/**
* Perform mask and shift to place the supplied value into
* the supplied bit rage.
*
* Example: cvmx_build_bits(39,24,value)
* <pre>
* 6 5 4 3 3 2 1
* 3 5 7 9 1 3 5 7 0
* +-------+-------+-------+-------+-------+-------+-------+------+
* 000000000000000000000000___________value000000000000000000000000
* </pre>
*
* @param high_bit Highest bit value can occupy (inclusive) 0-63
* @param low_bit Lowest bit value can occupy inclusive 0-high_bit
* @param value Value to use
* @return Value masked and shifted
*/
static inline uint64_t cvmx_build_bits(uint64_t high_bit, uint64_t low_bit, uint64_t value)
{
return ((value & cvmx_build_mask(high_bit - low_bit + 1)) << low_bit);
}
/**
* Return the number of cores available in the chip
*
* @return
*/
static inline uint32_t cvmx_octeon_num_cores(void)
{
uint32_t ciu_fuse = (uint32_t)cvmx_read_csr(CVMX_CIU_FUSE) & 0xffffffffull;
return cvmx_pop(ciu_fuse);
}
/**
* Return true if Octeon is CN36XX
*
* @return
*/
static inline int cvmx_octeon_model_CN36XX(void)
{
return(OCTEON_IS_MODEL(OCTEON_CN38XX)
&&cvmx_fuse_read(264));
}
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_UTILS_H__ */
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