* Copyright (C) 2004, 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
+ * Copyright (C) 2007,2008 Øyvind Harboe *
+ * oyvind.harboe@zylin.com *
+ * *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
#ifndef TYPES_H
#define TYPES_H
-#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <stddef.h>
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
#endif
-
-#ifndef u8
-typedef unsigned char u8;
+#ifdef HAVE_STDINT_H
+#include <stdint.h>
#endif
-
-#ifndef u16
-typedef unsigned short u16;
+#ifdef HAVE_INTTYPES_H
+#include <inttypes.h>
#endif
-#ifndef u32
-typedef unsigned int u32;
-#endif
+#ifdef HAVE_STDBOOL_H
+#include <stdbool.h>
+#else /* HAVE_STDBOOL_H */
+#define __bool_true_false_are_defined 1
-#ifndef u64
-typedef unsigned long long u64;
-#endif
+#ifndef HAVE__BOOL
+#ifndef __cplusplus
+
+#define false 0
+#define true 1
+
+typedef int _Bool;
+#else
+typedef bool _Bool;
+#endif /* __cplusplus */
+#endif /* HAVE__BOOL */
+#define bool _Bool
+#endif /* HAVE_STDBOOL_H */
-/* DANGER!!!! here be dragons! Note that the pointer in
- * memory might be unaligned. On some CPU's, i.e. ARM7,
- * the 2 lsb are ignored for 32 bit access, on others
- * it will cause an exception and on e.g. x86, it works
- * the same as if aligned.
+/// turns a macro argument into a string constant
+#define stringify(s) __stringify(s)
+#define __stringify(s) #s
+
+
+/**
+ * Compute the number of elements of a variable length array.
+ * <code>
+ * const char *strs[] = { "a", "b", "c" };
+ * unsigned num_strs = ARRAY_SIZE(strs);
+ * </code>
+ */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
+
+
+/**
+ * Cast a member of a structure out to the containing structure.
+ * @param ptr The pointer to the member.
+ * @param type The type of the container struct this is embedded in.
+ * @param member The name of the member within the struct.
+ *
+ * This is a mechanism which is used throughout the Linux kernel.
*/
-#define le_to_h_u32(x) ((u32)((x)[0] | (x)[1] << 8 | (x)[2] << 16 | (x)[3] << 24))
-#define le_to_h_u16(x) ((u16)((x)[0] | (x)[1] << 8))
-#define be_to_h_u32(x) ((u32)((x)[3] | (x)[2] << 8 | (x)[1] << 16 | (x)[0] << 24))
-#define be_to_h_u16(x) ((u16)((x)[1] | (x)[0] << 8))
-
-#define h_u32_to_le(buf, val) do {\
-(buf)[3] = ((val) & 0xff000000) >> 24;\
-(buf)[2] = ((val) & 0x00ff0000) >> 16;\
-(buf)[1] = ((val) & 0x0000ff00) >> 8;\
-(buf)[0] = ((val) & 0x000000ff);\
-} while (0)
-#define h_u32_to_be(buf, val) do {\
-(buf)[0] = ((val) & 0xff000000) >> 24;\
-(buf)[1] = ((val) & 0x00ff0000) >> 16;\
-(buf)[2] = ((val) & 0x0000ff00) >> 8;\
-(buf)[3] = ((val) & 0x000000ff);\
-} while (0)
-
-#define h_u16_to_le(buf, val) do {\
-(buf)[1] = ((val) & 0xff00) >> 8;\
-(buf)[0] = ((val) & 0x00ff) >> 0;\
-} while (0)
-#define h_u16_to_be(buf, val) do {\
-(buf)[0] = ((val) & 0xff00) >> 8;\
-(buf)[1] = ((val) & 0x00ff) >> 0;\
-} while (0)
+#define container_of(ptr, type, member) ({ \
+ const typeof( ((type *)0)->member ) *__mptr = (ptr); \
+ (type *)( (void *) ( (char *)__mptr - offsetof(type,member) ) );})
+
+
+/**
+ * Rounds @c m up to the nearest multiple of @c n using division.
+ * @param m The value to round up to @c n.
+ * @param n Round @c m up to a multiple of this number.
+ * @returns The rounded integer value.
+ */
+#define DIV_ROUND_UP(m, n) (((m) + (n) - 1) / (n))
+
+
+/* DANGER!!!! here be dragons!
+ *
+ * Leave these fn's as byte accesses because it is safe
+ * across architectures. Clever usage of 32 bit access
+ * will create problems on some hosts.
+ *
+ * Note that the "buf" pointer in memory is probably unaligned.
+ *
+ * Were these functions to be re-written to take a 32 bit wide or 16 bit wide
+ * memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
+ * ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
+ * will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
+ * memory access works as if aligned. So what follows below will work for all
+ * platforms and gives the compiler leeway to do its own platform specific optimizations.
+ *
+ * Again, note that the "buf" pointer in memory is probably unaligned.
+ */
+
+
+static inline uint32_t le_to_h_u32(const uint8_t* buf)
+{
+ return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
+}
+
+static inline uint32_t le_to_h_u24(const uint8_t* buf)
+{
+ return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16);
+}
+
+static inline uint16_t le_to_h_u16(const uint8_t* buf)
+{
+ return (uint16_t)(buf[0] | buf[1] << 8);
+}
+
+static inline uint32_t be_to_h_u32(const uint8_t* buf)
+{
+ return (uint32_t)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
+}
+
+static inline uint32_t be_to_h_u24(const uint8_t* buf)
+{
+ return (uint32_t)(buf[2] | buf[1] << 8 | buf[0] << 16);
+}
+
+static inline uint16_t be_to_h_u16(const uint8_t* buf)
+{
+ return (uint16_t)(buf[1] | buf[0] << 8);
+}
+static inline void h_u32_to_le(uint8_t* buf, int val)
+{
+ buf[3] = (uint8_t) (val >> 24);
+ buf[2] = (uint8_t) (val >> 16);
+ buf[1] = (uint8_t) (val >> 8);
+ buf[0] = (uint8_t) (val >> 0);
+}
+
+static inline void h_u32_to_be(uint8_t* buf, int val)
+{
+ buf[0] = (uint8_t) (val >> 24);
+ buf[1] = (uint8_t) (val >> 16);
+ buf[2] = (uint8_t) (val >> 8);
+ buf[3] = (uint8_t) (val >> 0);
+}
+
+static inline void h_u24_to_le(uint8_t* buf, int val)
+{
+ buf[2] = (uint8_t) (val >> 16);
+ buf[1] = (uint8_t) (val >> 8);
+ buf[0] = (uint8_t) (val >> 0);
+}
+
+static inline void h_u24_to_be(uint8_t* buf, int val)
+{
+ buf[0] = (uint8_t) (val >> 16);
+ buf[1] = (uint8_t) (val >> 8);
+ buf[2] = (uint8_t) (val >> 0);
+}
+
+static inline void h_u16_to_le(uint8_t* buf, int val)
+{
+ buf[1] = (uint8_t) (val >> 8);
+ buf[0] = (uint8_t) (val >> 0);
+}
+
+static inline void h_u16_to_be(uint8_t* buf, int val)
+{
+ buf[0] = (uint8_t) (val >> 8);
+ buf[1] = (uint8_t) (val >> 0);
+}
+
+/**
+ * Byte-swap buffer 16-bit.
+ *
+ * Len must be even, dst and src must be either the same or non-overlapping.
+ *
+ * @param dst Destination buffer.
+ * @param src Source buffer.
+ * @param len Length of source (and destination) buffer, in bytes.
+ */
+static inline void buf_bswap16(uint8_t *dst, const uint8_t *src, size_t len)
+{
+ assert(len % 2 == 0);
+ assert(dst == src || dst + len <= src || src + len <= dst);
+
+ for (size_t n = 0; n < len; n += 2) {
+ uint16_t x = be_to_h_u16(src + n);
+ h_u16_to_le(dst + n, x);
+ }
+}
+
+/**
+ * Byte-swap buffer 32-bit.
+ *
+ * Len must be divisible by four, dst and src must be either the same or non-overlapping.
+ *
+ * @param dst Destination buffer.
+ * @param src Source buffer.
+ * @param len Length of source (and destination) buffer, in bytes.
+ */
+static inline void buf_bswap32(uint8_t *dst, const uint8_t *src, size_t len)
+{
+ assert(len % 4 == 0);
+ assert(dst == src || dst + len <= src || src + len <= dst);
+
+ for (size_t n = 0; n < len; n += 4) {
+ uint32_t x = be_to_h_u32(src + n);
+ h_u32_to_le(dst + n, x);
+ }
+}
+
+#if defined(__ECOS)
+
+/* eCos plain lacks these definition... A series of upstream patches
+ * could probably repair it, but it seems like too much work to be
+ * worth it.
+ */
+
+#if !defined(_STDINT_H)
+#define PRIx32 "x"
+#define PRId32 "d"
+#define SCNx32 "x"
+#define PRIi32 "i"
+#define PRIu32 "u"
+#define PRId8 PRId32
+#define SCNx64 "llx"
+#define PRIx64 "llx"
+
+typedef CYG_ADDRWORD intptr_t;
+typedef int64_t intmax_t;
+typedef uint64_t uintmax_t;
+#define INT8_MAX 0x7f
+#define INT8_MIN (-INT8_MAX - 1)
+# define UINT8_MAX (255)
+#define INT16_MAX 0x7fff
+#define INT16_MIN (-INT16_MAX - 1)
+# define UINT16_MAX (65535)
+#define INT32_MAX 0x7fffffffL
+#define INT32_MIN (-INT32_MAX - 1L)
+# define UINT32_MAX (4294967295U)
+#define INT64_MAX 0x7fffffffffffffffLL
+#define INT64_MIN (-INT64_MAX - 1LL)
+#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)
+#endif
+
+ #ifndef LLONG_MAX
+ #define ULLONG_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
+ #define LLONG_MAX INT64_C(0x7FFFFFFFFFFFFFFF)
+ #define LLONG_MIN ULLONG_MAX
+ #endif
+
+
+#define ULLONG_MAX 18446744073709551615
+
+/* C99, eCos is C90 compliant (with bits of C99) */
+#define isblank(c) ((c) == ' ' || (c) == '\t')
+
+
+#endif
#endif /* TYPES_H */
projects / fw / openocd / blobdiff