X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fhelper%2Fbinarybuffer.h;h=9c20bcd59c8802a6599ebb52f11a7f6857c071a7;hp=60077b31ad2b30680465893cbeb26c3088a327f3;hb=01298ca2c839965f54d6d6a7b8ac00fe77190116;hpb=82fc2f9628e0f1dbd9010e0146ff63832e4a77a1 diff --git a/src/helper/binarybuffer.h b/src/helper/binarybuffer.h index 60077b31ad..9c20bcd59c 100644 --- a/src/helper/binarybuffer.h +++ b/src/helper/binarybuffer.h @@ -18,30 +18,39 @@ * 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 BINARYBUFFER_H #define BINARYBUFFER_H -#include "types.h" +#include "list.h" /** @file * Support functions to access arbitrary bits in a byte array */ -/* inlining this will help show what fn that is taking time during profiling. */ -static inline void buf_set_u32(uint8_t* buffer, - unsigned int first, unsigned int num, uint32_t value) +/** + * Sets @c num bits in @c _buffer, starting at the @c first bit, + * using the bits in @c value. This routine fast-paths writes + * of little-endian, byte-aligned, 32-bit words. + * @param _buffer The buffer whose bits will be set. + * @param first The bit offset in @c _buffer to start writing (0-31). + * @param num The number of bits from @c value to copy (1-32). + * @param value Up to 32 bits that will be copied to _buffer. + */ +static inline void buf_set_u32(void *_buffer, + unsigned first, unsigned num, uint32_t value) { + uint8_t *buffer = _buffer; + if ((num == 32) && (first == 0)) { buffer[3] = (value >> 24) & 0xff; buffer[2] = (value >> 16) & 0xff; buffer[1] = (value >> 8) & 0xff; buffer[0] = (value >> 0) & 0xff; } else { - unsigned int i; - for (i = first; i < first + num; i++) - { + for (unsigned i = first; i < first + num; i++) { if (((value >> (i - first)) & 1) == 1) buffer[i / 8] |= 1 << (i % 8); else @@ -49,19 +58,67 @@ static inline void buf_set_u32(uint8_t* buffer, } } } -static inline uint32_t buf_get_u32(const uint8_t* buffer, - unsigned int first, unsigned int num) + +/** + * Sets @c num bits in @c _buffer, starting at the @c first bit, + * using the bits in @c value. This routine fast-paths writes + * of little-endian, byte-aligned, 64-bit words. + * @param _buffer The buffer whose bits will be set. + * @param first The bit offset in @c _buffer to start writing (0-63). + * @param num The number of bits from @c value to copy (1-64). + * @param value Up to 64 bits that will be copied to _buffer. + */ +static inline void buf_set_u64(void *_buffer, + unsigned first, unsigned num, uint64_t value) +{ + uint8_t *buffer = _buffer; + + if ((num == 32) && (first == 0)) { + buffer[3] = (value >> 24) & 0xff; + buffer[2] = (value >> 16) & 0xff; + buffer[1] = (value >> 8) & 0xff; + buffer[0] = (value >> 0) & 0xff; + } else if ((num == 64) && (first == 0)) { + buffer[7] = (value >> 56) & 0xff; + buffer[6] = (value >> 48) & 0xff; + buffer[5] = (value >> 40) & 0xff; + buffer[4] = (value >> 32) & 0xff; + buffer[3] = (value >> 24) & 0xff; + buffer[2] = (value >> 16) & 0xff; + buffer[1] = (value >> 8) & 0xff; + buffer[0] = (value >> 0) & 0xff; + } else { + for (unsigned i = first; i < first + num; i++) { + if (((value >> (i - first)) & 1) == 1) + buffer[i / 8] |= 1 << (i % 8); + else + buffer[i / 8] &= ~(1 << (i % 8)); + } + } +} + +/** + * Retrieves @c num bits from @c _buffer, starting at the @c first bit, + * returning the bits in a 32-bit word. This routine fast-paths reads + * of little-endian, byte-aligned, 32-bit words. + * @param _buffer The buffer whose bits will be read. + * @param first The bit offset in @c _buffer to start reading (0-31). + * @param num The number of bits from @c _buffer to read (1-32). + * @returns Up to 32-bits that were read from @c _buffer. + */ +static inline uint32_t buf_get_u32(const void *_buffer, + unsigned first, unsigned num) { + const uint8_t *buffer = _buffer; + if ((num == 32) && (first == 0)) { return (((uint32_t)buffer[3]) << 24) | - (((uint32_t)buffer[2]) << 16) | - (((uint32_t)buffer[1]) << 8) | - (((uint32_t)buffer[0]) << 0); + (((uint32_t)buffer[2]) << 16) | + (((uint32_t)buffer[1]) << 8) | + (((uint32_t)buffer[0]) << 0); } else { uint32_t result = 0; - unsigned int i; - for (i = first; i < first + num; i++) - { + for (unsigned i = first; i < first + num; i++) { if (((buffer[i / 8] >> (i % 8)) & 1) == 1) result |= 1 << (i - first); } @@ -69,28 +126,118 @@ static inline uint32_t buf_get_u32(const uint8_t* buffer, } } -/// flip_u32 inverts the bit order inside a 32-bit word (31..0 -> 0..31) -uint32_t flip_u32(uint32_t value, unsigned int num); +/** + * Retrieves @c num bits from @c _buffer, starting at the @c first bit, + * returning the bits in a 64-bit word. This routine fast-paths reads + * of little-endian, byte-aligned, 64-bit words. + * @param _buffer The buffer whose bits will be read. + * @param first The bit offset in @c _buffer to start reading (0-63). + * @param num The number of bits from @c _buffer to read (1-64). + * @returns Up to 64-bits that were read from @c _buffer. + */ +static inline uint64_t buf_get_u64(const void *_buffer, + unsigned first, unsigned num) +{ + const uint8_t *buffer = _buffer; -int buf_cmp(const uint8_t *buf1, const uint8_t *buf2, int size); -int buf_cmp_mask(const uint8_t *buf1, const uint8_t *buf2, - const uint8_t *mask, int size); -uint8_t* buf_cpy(const uint8_t *from, uint8_t *to, int size); + if ((num == 32) && (first == 0)) { + return 0 + ((((uint32_t)buffer[3]) << 24) | /* Note - zero plus is to avoid a checkpatch bug */ + (((uint32_t)buffer[2]) << 16) | + (((uint32_t)buffer[1]) << 8) | + (((uint32_t)buffer[0]) << 0)); + } else if ((num == 64) && (first == 0)) { + return 0 + ((((uint64_t)buffer[7]) << 56) | /* Note - zero plus is to avoid a checkpatch bug */ + (((uint64_t)buffer[6]) << 48) | + (((uint64_t)buffer[5]) << 40) | + (((uint64_t)buffer[4]) << 32) | + (((uint64_t)buffer[3]) << 24) | + (((uint64_t)buffer[2]) << 16) | + (((uint64_t)buffer[1]) << 8) | + (((uint64_t)buffer[0]) << 0)); + } else { + uint64_t result = 0; + for (unsigned i = first; i < first + num; i++) { + if (((buffer[i / 8] >> (i % 8)) & 1) == 1) + result = result | ((uint64_t)1 << (uint64_t)(i - first)); + } + return result; + } +} -uint8_t* buf_set_ones(uint8_t *buf, int count); -uint8_t* buf_set_buf(const uint8_t *src, int src_start, - uint8_t *dst, int dst_start, int len); -int str_to_buf(const char *str, int len, - uint8_t *bin_buf, int buf_size, int radix); -char* buf_to_str(const uint8_t *buf, int size, int radix); +/** + * Inverts the ordering of bits inside a 32-bit word (e.g. 31..0 -> 0..31). + * This routine can be used to flip smaller data types by using smaller + * values for @c width. + * @param value The word to flip. + * @param width The number of bits in value (2-32). + * @returns A 32-bit word with @c value in reversed bit-order. + */ +uint32_t flip_u32(uint32_t value, unsigned width); -#define CEIL(m, n) (((m) + (n) - 1) / (n)) +bool buf_cmp(const void *buf1, const void *buf2, unsigned size); +bool buf_cmp_mask(const void *buf1, const void *buf2, + const void *mask, unsigned size); + +/** + * Copies @c size bits out of @c from and into @c to. Any extra + * bits in the final byte will be set to zero. + * @param from The buffer to copy into @c to. + * @param to The buffer that will receive the copy of @c from. + * @param size The number of bits to copy. + */ +void *buf_cpy(const void *from, void *to, unsigned size); + +/** + * Set the contents of @c buf with @c count bits, all set to 1. + * @param buf The buffer to fill with ones. + * @param size The number of bits. + * @returns The original buffer (@c buf). + */ +void *buf_set_ones(void *buf, unsigned size); + +void *buf_set_buf(const void *src, unsigned src_start, + void *dst, unsigned dst_start, unsigned len); + +int str_to_buf(const char *str, unsigned len, + void *bin_buf, unsigned buf_size, unsigned radix); +char *buf_to_str(const void *buf, unsigned size, unsigned radix); /* read a uint32_t from a buffer in target memory endianness */ -static inline uint32_t fast_target_buffer_get_u32(const uint8_t *p, int le) +static inline uint32_t fast_target_buffer_get_u32(const void *p, bool le) { return le ? le_to_h_u32(p) : be_to_h_u32(p); } +static inline void bit_copy(uint8_t *dst, unsigned dst_offset, const uint8_t *src, + unsigned src_offset, unsigned bit_count) +{ + buf_set_buf(src, src_offset, dst, dst_offset, bit_count); +} + +struct bit_copy_queue { + struct list_head list; +}; + +struct bit_copy_queue_entry { + uint8_t *dst; + unsigned dst_offset; + const uint8_t *src; + unsigned src_offset; + unsigned bit_count; + struct list_head list; +}; + +void bit_copy_queue_init(struct bit_copy_queue *q); +int bit_copy_queued(struct bit_copy_queue *q, uint8_t *dst, unsigned dst_offset, const uint8_t *src, + unsigned src_offset, unsigned bit_count); +void bit_copy_execute(struct bit_copy_queue *q); +void bit_copy_discard(struct bit_copy_queue *q); + +/* functions to convert to/from hex encoded buffer + * used in ti-icdi driver and gdb server */ +int unhexify(char *bin, const char *hex, int count); +int hexify(char *hex, const char *bin, int count, int out_maxlen); +void buffer_shr(void *_buf, unsigned buf_len, unsigned count); + #endif /* BINARYBUFFER_H */