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mem: Merge ranges that are part of the conf table

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This patch adds basic merging of address ranges when determining which
address ranges should be reported in the configuration table. By
performing this merging it is possible to distribute an address range
across many memory channels (controllers). This is essential to enable
address interleaving.
This commit is contained in:
Andreas Hansson 2013-01-07 13:05:38 -05:00
parent b8c2fa6ba9
commit 18b147acef
2 changed files with 28 additions and 5 deletions
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29
src/mem/physical.cc
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@ -203,13 +203,34 @@ PhysicalMemory::getConfAddrRanges() const
// this could be done once in the constructor, but since it is unlikely to
// be called more than once the iteration should not be a problem
AddrRangeList ranges;
for (vector<AbstractMemory*>::const_iterator m = memories.begin();
m != memories.end(); ++m) {
if ((*m)->isConfReported()) {
ranges.push_back((*m)->getAddrRange());
vector<AddrRange> intlv_ranges;
for (AddrRangeMap<AbstractMemory*>::const_iterator r = addrMap.begin();
r != addrMap.end(); ++r) {
if (r->second->isConfReported()) {
// if the range is interleaved then save it for now
if (r->first.interleaved()) {
// if we already got interleaved ranges that are not
// part of the same range, then first do a merge
// before we add the new one
if (!intlv_ranges.empty() &&
!intlv_ranges.back().mergesWith(r->first)) {
ranges.push_back(AddrRange(intlv_ranges));
intlv_ranges.clear();
}
intlv_ranges.push_back(r->first);
} else {
// keep the current range
ranges.push_back(r->first);
}
}
}
// if there is still interleaved ranges waiting to be merged,
// go ahead and do it
if (!intlv_ranges.empty()) {
ranges.push_back(AddrRange(intlv_ranges));
}
return ranges;
}

4
src/mem/physical.hh
View file

@ -135,7 +135,9 @@ class PhysicalMemory : public Serializable
/**
* Get the memory ranges for all memories that are to be reported
* to the configuration table.
* to the configuration table. The ranges are merged before they
* are returned such that any interleaved ranges appear as a
* single range.
*
* @return All configuration table memory ranges
*/