diff options
Diffstat (limited to 'src/base/addr_range.hh')
| -rw-r--r-- | src/base/addr_range.hh | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/base/addr_range.hh b/src/base/addr_range.hh index edcc0bf2f..546d81611 100644 --- a/src/base/addr_range.hh +++ b/src/base/addr_range.hh @@ -45,6 +45,8 @@ #ifndef __BASE_ADDR_RANGE_HH__ #define __BASE_ADDR_RANGE_HH__ +#include <vector> + #include "base/bitfield.hh" #include "base/cprintf.hh" #include "base/misc.hh" @@ -87,6 +89,46 @@ class AddrRange {} /** + * Create an address range by merging a collection of interleaved + * ranges. + * + * @param ranges Interleaved ranges to be merged + */ + AddrRange(const std::vector<AddrRange>& ranges) + : _start(1), _end(0), intlvHighBit(0), intlvBits(0), intlvMatch(0) + { + if (!ranges.empty()) { + // get the values from the first one and check the others + _start = ranges.front()._start; + _end = ranges.front()._end; + intlvHighBit = ranges.front().intlvHighBit; + intlvBits = ranges.front().intlvBits; + + if (ranges.size() != (ULL(1) << intlvBits)) + fatal("Got %d ranges spanning %d interleaving bits\n", + ranges.size(), intlvBits); + + uint8_t match = 0; + for (std::vector<AddrRange>::const_iterator r = ranges.begin(); + r != ranges.end(); ++r) { + if (!mergesWith(*r)) + fatal("Can only merge ranges with the same start, end " + "and interleaving bits\n"); + + if (r->intlvMatch != match) + fatal("Expected interleave match %d but got %d when " + "merging\n", match, r->intlvMatch); + ++match; + } + + // our range is complete and we can turn this into a + // non-interleaved range + intlvHighBit = 0; + intlvBits = 0; + } + } + + /** * Determine if the range is interleaved or not. * * @return true if interleaved |