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Kernel/MM: Parse /memreserve/ blocks in FDT based memory mapping mode

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These seem to be actually used in the RPi FDTs
This commit is contained in:
Hendiadyoin1 2024-03-03 13:52:35 +01:00 committed by Andrew Kaster
parent 2b13769dd5
commit 8ea8b7a6e5
1 changed files with 12 additions and 2 deletions
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14
Kernel/Memory/MemoryManager.cpp
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@ -385,7 +385,17 @@ UNMAP_AFTER_INIT void MemoryManager::parse_memory_map_fdt(MemoryManager::GlobalD
auto const& fdt_header = *reinterpret_cast<DeviceTree::FlattenedDeviceTreeHeader const*>(fdt_addr);
auto fdt_buffer = ReadonlyBytes(fdt_addr, fdt_header.totalsize);
// FIXME: Parse the MemoryReservationBlock
auto const* mem_reserve_block = reinterpret_cast<DeviceTree::FlattenedDeviceTreeReserveEntry const*>(&fdt_buffer[fdt_header.off_mem_rsvmap]);
u64 next_block_offset = fdt_header.off_mem_rsvmap + sizeof(DeviceTree::FlattenedDeviceTreeReserveEntry);
while ((next_block_offset < fdt_header.off_dt_struct) && (*mem_reserve_block != DeviceTree::FlattenedDeviceTreeReserveEntry {})) {
dbgln("MM: Reserved Range /memreserve/: address: {} size {:#x}", PhysicalAddress { mem_reserve_block->address }, mem_reserve_block->size);
global_data.physical_memory_ranges.append(PhysicalMemoryRange { PhysicalMemoryRangeType::Reserved, PhysicalAddress { mem_reserve_block->address }, mem_reserve_block->size });
// FIXME: Not all of these are "used", only those in "memory" are actually "used"
global_data.used_memory_ranges.append(UsedMemoryRange { UsedMemoryRangeType::BootModule, PhysicalAddress { mem_reserve_block->address }, PhysicalAddress { mem_reserve_block->address + mem_reserve_block->size } });
++mem_reserve_block;
next_block_offset += sizeof(DeviceTree::FlattenedDeviceTreeReserveEntry);
}
// Schema:
// https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/root-node.yaml
@ -396,7 +406,7 @@ UNMAP_AFTER_INIT void MemoryManager::parse_memory_map_fdt(MemoryManager::GlobalD
// https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/reserved-memory/reserved-memory.yaml
// Memory:
// https://github.com/devicetree-org/dt-schema/blob/main/dtschema/schemas/memory.yaml
// -> #address-cells: /#address-cells , #size-cells: /size-cells #
// -> #address-cells: /#address-cells , #size-cells: /#size-cells
// FIXME: When booting from UEFI, the /memory node may not be relied upon
enum class State {