mips: add breakpoint support for EJTAG 2.0

[fw/openocd] / src / helper / binarybuffer.h

diff --git a/src/helper/binarybuffer.h b/src/helper/binarybuffer.h
index 3fbfea49efa7ea271ee96216dd180e4fad6ca165..c2d643b13e44e8a9b9d6a2a54bc3081a5b1e7201 100644 (file)
--- a/src/helper/binarybuffer.h
+++ b/src/helper/binarybuffer.h
@@ -58,6 +58,45 @@ static inline void buf_set_u32(void *_buffer,
                }
        }
 }
+
+/**
+ * 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 = (uint8_t *)_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
@@ -87,6 +126,45 @@ static inline uint32_t buf_get_u32(const void *_buffer,
        }
 }
 
+/**
+ * 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)
+{
+       uint8_t *buffer = (uint8_t *)_buffer;
+
+       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;
+       }
+}
+
+
 /**
  * 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