-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * 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 Intel Corporation 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2014 Intel Corporation
*/
#ifndef _RTE_CPUFLAGS_H_
* Architecture specific API to determine available CPU features at runtime.
*/
-#include <stdlib.h>
-#include <stdio.h>
+#include "rte_common.h"
#include <errno.h>
-#include <stdint.h>
-
-#ifdef __cplusplus
-#define __RTE_CPUFLAG_UNDERLYING_TYPE : unsigned int
-#define __RTE_REGISTER_UNDERLYING_TYPE : unsigned int
-#else
-#define __RTE_CPUFLAG_UNDERLYING_TYPE
-#define __RTE_REGISTER_UNDERLYING_TYPE
-#endif
/**
* Enumeration of all CPU features supported
*/
-enum rte_cpu_flag_t __RTE_CPUFLAG_UNDERLYING_TYPE;
-
-/**
- * Enumeration of CPU registers
- */
-enum cpu_register_t __RTE_REGISTER_UNDERLYING_TYPE;
-
-typedef uint32_t cpuid_registers_t[4];
-
-#define CPU_FLAG_NAME_MAX_LEN 64
-
-/**
- * Struct to hold a processor feature entry
- */
-struct feature_entry {
- uint32_t leaf; /**< cpuid leaf */
- uint32_t subleaf; /**< cpuid subleaf */
- uint32_t reg; /**< cpuid register */
- uint32_t bit; /**< cpuid register bit */
- char name[CPU_FLAG_NAME_MAX_LEN]; /**< String for printing */
-};
-
-#define FEAT_DEF(name, leaf, subleaf, reg, bit) \
- [RTE_CPUFLAG_##name] = {leaf, subleaf, reg, bit, #name },
-
-/**
- * An array that holds feature entries
- *
- * Defined in arch-specific rte_cpuflags.h.
- */
-#ifdef __DOXYGEN__
-static const struct feature_entry cpu_feature_table[];
-#endif
+__extension__
+enum rte_cpu_flag_t;
/**
- * Execute CPUID instruction and get contents of a specific register
+ * Get name of CPU flag
*
- * This function, when compiled with GCC, will generate architecture-neutral
- * code, as per GCC manual.
+ * @param feature
+ * CPU flag ID
+ * @return
+ * flag name
+ * NULL if flag ID is invalid
*/
-static inline void
-rte_cpu_get_features(uint32_t leaf, uint32_t subleaf, cpuid_registers_t out);
+__extension__
+const char *
+rte_cpu_get_flag_name(enum rte_cpu_flag_t feature);
/**
* Function for checking a CPU flag availability
* 0 if flag is not available
* -ENOENT if flag is invalid
*/
-static inline int
+__extension__
+int
rte_cpu_get_flag_enabled(enum rte_cpu_flag_t feature);
/**
* This function checks that the currently used CPU supports the CPU features
* that were specified at compile time. It is called automatically within the
- * EAL, so does not need to be used by applications.
+ * EAL, so does not need to be used by applications. This version returns a
+ * result so that decisions may be made (for instance, graceful shutdowns).
+ */
+int
+rte_cpu_is_supported(void);
+
+/**
+ * This function attempts to retrieve a value from the auxiliary vector.
+ * If it is unsuccessful, the result will be 0, and errno will be set.
+ *
+ * @return A value from the auxiliary vector. When the value is 0, check
+ * errno to determine if an error occurred.
+ */
+unsigned long
+rte_cpu_getauxval(unsigned long type);
+
+/**
+ * This function retrieves a value from the auxiliary vector, and compares it
+ * as a string against the value retrieved.
+ *
+ * @return The result of calling strcmp() against the value retrieved from
+ * the auxiliary vector. When the value is 0 (meaning a match is found),
+ * check errno to determine if an error occurred.
*/
-void
-rte_cpu_check_supported(void);
+int
+rte_cpu_strcmp_auxval(unsigned long type, const char *str);
#endif /* _RTE_CPUFLAGS_H_ */
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