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[Zion] Add a AddressSpaceUnmap syscall to free memory.

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This commit is contained in:
Drew Galbraith 2023-11-19 18:55:44 -08:00
parent e668428d9d
commit 30b6511467
9 changed files with 60 additions and 18 deletions
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29
zion/lib/memory_mapping_tree.cpp
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@ -28,9 +28,32 @@ glcr::ErrorCode MemoryMappingTree::AddInMemoryObject(
return glcr::OK;
}
glcr::ErrorCode FreeMemoryRange(uint64_t vaddr_base, uint64_t vaddr_limit) {
dbgln("Unhandled free memory range!");
return glcr::OK;
glcr::ErrorCode MemoryMappingTree::FreeMemoryRange(uint64_t vaddr_base,
uint64_t vaddr_limit) {
if (vaddr_limit <= vaddr_base) {
return glcr::INVALID_ARGUMENT;
}
auto predecessor_or = mapping_tree_.Predecessor(vaddr_base);
if (predecessor_or && predecessor_or.value().get().vaddr_limit > vaddr_base) {
return glcr::FAILED_PRECONDITION;
}
auto last_predecessor_or = mapping_tree_.Predecessor(vaddr_limit);
if (last_predecessor_or &&
last_predecessor_or.value().get().vaddr_limit > vaddr_limit) {
return glcr::FAILED_PRECONDITION;
}
auto find_or = mapping_tree_.Find(vaddr_base);
if (find_or) {
mapping_tree_.Delete(vaddr_base);
}
while (true) {
auto successor_or = mapping_tree_.Successor(vaddr_base);
if (!successor_or || successor_or.value().get().vaddr_base >= vaddr_limit) {
return glcr::OK;
}
mapping_tree_.Delete(successor_or.value().get().vaddr_base);
}
}
glcr::ErrorOr<uint64_t> MemoryMappingTree::GetPhysicalPageAtVaddr(