eal: simplify meson build of common directory

[dpdk.git] / lib / librte_eal / common / include / rte_common.h

diff --git a/lib/librte_eal/common/include/rte_common.h b/lib/librte_eal/common/include/rte_common.h
index 05a3a64..f820c2e 100644 (file)
--- a/lib/librte_eal/common/include/rte_common.h
+++ b/lib/librte_eal/common/include/rte_common.h
@@ -42,8 +42,23 @@ extern "C" {
 #define RTE_STD_C11
 #endif
 
-/** Define GCC_VERSION **/
-#ifdef RTE_TOOLCHAIN_GCC
+/*
+ * RTE_TOOLCHAIN_GCC is defined if the target is built with GCC,
+ * while a host application (like pmdinfogen) may have another compiler.
+ * RTE_CC_IS_GNU is true if the file is compiled with GCC,
+ * no matter it is a target or host application.
+ */
+#define RTE_CC_IS_GNU 0
+#if defined __clang__
+#define RTE_CC_CLANG
+#elif defined __INTEL_COMPILER
+#define RTE_CC_ICC
+#elif defined __GNUC__
+#define RTE_CC_GCC
+#undef RTE_CC_IS_GNU
+#define RTE_CC_IS_GNU 1
+#endif
+#if RTE_CC_IS_GNU
 #define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + \
                __GNUC_PATCHLEVEL__)
 #endif
@@ -89,6 +104,21 @@ typedef uint16_t unaligned_uint16_t;
  */
 #define RTE_SET_USED(x) (void)(x)
 
+/**
+ * Check format string and its arguments at compile-time.
+ *
+ * GCC on Windows assumes MS-specific format string by default,
+ * even if the underlying stdio implementation is ANSI-compliant,
+ * so this must be overridden.
+ */
+#if RTE_CC_IS_GNU
+#define __rte_format_printf(format_index, first_arg) \
+       __attribute__((format(gnu_printf, format_index, first_arg)))
+#else
+#define __rte_format_printf(format_index, first_arg) \
+       __attribute__((format(printf, format_index, first_arg)))
+#endif
+
 #define RTE_PRIORITY_LOG 101
 #define RTE_PRIORITY_BUS 110
 #define RTE_PRIORITY_CLASS 120
@@ -291,6 +321,63 @@ rte_is_aligned(void *ptr, unsigned align)
  */
 #define RTE_BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
 
+/*********** Cache line related macros ********/
+
+/** Cache line mask. */
+#define RTE_CACHE_LINE_MASK (RTE_CACHE_LINE_SIZE-1)
+
+/** Return the first cache-aligned value greater or equal to size. */
+#define RTE_CACHE_LINE_ROUNDUP(size) \
+       (RTE_CACHE_LINE_SIZE * ((size + RTE_CACHE_LINE_SIZE - 1) / \
+       RTE_CACHE_LINE_SIZE))
+
+/** Cache line size in terms of log2 */
+#if RTE_CACHE_LINE_SIZE == 64
+#define RTE_CACHE_LINE_SIZE_LOG2 6
+#elif RTE_CACHE_LINE_SIZE == 128
+#define RTE_CACHE_LINE_SIZE_LOG2 7
+#else
+#error "Unsupported cache line size"
+#endif
+
+/** Minimum Cache line size. */
+#define RTE_CACHE_LINE_MIN_SIZE 64
+
+/** Force alignment to cache line. */
+#define __rte_cache_aligned __rte_aligned(RTE_CACHE_LINE_SIZE)
+
+/** Force minimum cache line alignment. */
+#define __rte_cache_min_aligned __rte_aligned(RTE_CACHE_LINE_MIN_SIZE)
+
+/*********** PA/IOVA type definitions ********/
+
+/** Physical address */
+typedef uint64_t phys_addr_t;
+#define RTE_BAD_PHYS_ADDR ((phys_addr_t)-1)
+
+/**
+ * IO virtual address type.
+ * When the physical addressing mode (IOVA as PA) is in use,
+ * the translation from an IO virtual address (IOVA) to a physical address
+ * is a direct mapping, i.e. the same value.
+ * Otherwise, in virtual mode (IOVA as VA), an IOMMU may do the translation.
+ */
+typedef uint64_t rte_iova_t;
+#define RTE_BAD_IOVA ((rte_iova_t)-1)
+
+/*********** Structure alignment markers ********/
+
+/** Generic marker for any place in a structure. */
+__extension__ typedef void    *RTE_MARKER[0];
+/** Marker for 1B alignment in a structure. */
+__extension__ typedef uint8_t  RTE_MARKER8[0];
+/** Marker for 2B alignment in a structure. */
+__extension__ typedef uint16_t RTE_MARKER16[0];
+/** Marker for 4B alignment in a structure. */
+__extension__ typedef uint32_t RTE_MARKER32[0];
+/** Marker for 8B alignment in a structure. */
+__extension__ typedef uint64_t RTE_MARKER64[0];
+
 /**
  * Combines 32b inputs most significant set bits into the least
  * significant bits to construct a value with the same MSBs as x
@@ -493,6 +580,9 @@ rte_bsf32_safe(uint64_t v, uint32_t *pos)
 /**
  * Return the rounded-up log2 of a integer.
  *
+ * @note Contrary to the logarithm mathematical operation,
+ * rte_log2_u32(0) == 0 and not -inf.
+ *
  * @param v
  *     The input parameter.
  * @return
@@ -587,6 +677,9 @@ rte_fls_u64(uint64_t x)
 /**
  * Return the rounded-up log2 of a 64-bit integer.
  *
+ * @note Contrary to the logarithm mathematical operation,
+ * rte_log2_u64(0) == 0 and not -inf.
+ *
  * @param v
  *     The input parameter.
  * @return
@@ -630,6 +723,18 @@ rte_log2_u64(uint64_t v)
                })
 #endif
 
+/**
+ * Get the size of a field in a structure.
+ *
+ * @param type
+ *   The type of the structure.
+ * @param field
+ *   The field in the structure.
+ * @return
+ *   The size of the field in the structure, in bytes.
+ */
+#define RTE_SIZEOF_FIELD(type, field) (sizeof(((type *)0)->field))
+
 #define _RTE_STR(x) #x
 /** Take a macro value and get a string version of it */
 #define RTE_STR(x) _RTE_STR(x)
@@ -709,7 +814,7 @@ rte_str_to_size(const char *str)
 void
 rte_exit(int exit_code, const char *format, ...)
        __attribute__((noreturn))
-       __attribute__((format(printf, 2, 3)));
+       __rte_format_printf(2, 3);
 
 #ifdef __cplusplus
 }