/// <summary>
/// Get the Memory Map Information from Multiboot
/// </summary>
/// <returns>Returns an array of MemoryMaps containing the Multiboot Memory Map information. The array may have empty values at the end.</returns>
public static unsafe MemoryMap[] GetMemoryMap()
{
if (!Multiboot2.MemoryMapExists())
{
throw new Exception("No Memory Map was returned by Multiboot");
}
var rawMap = new RawMemoryMap[64];
var baseMap = (RawMemoryMap *)((uint *)Multiboot2.MemoryMap + (uint)16);
var currentMap = baseMap;
uint totalSize = Multiboot2.MemoryMap->Size - 16;
uint entrySize = Multiboot2.MemoryMap->EntrySize;
int counter = 0;
while ((uint)currentMap < ((uint)baseMap + totalSize) && counter < 64)
{
rawMap[counter++] = *currentMap;
currentMap = (RawMemoryMap *)((uint)currentMap + entrySize);
}
if (counter >= 64)
{
throw new Exception("Memory Map returned too many segments");
}
var entireMap = new MemoryMap[counter];
for (int i = 0; i < counter; i++)
{
var rawMemoryMap = rawMap[i];
entireMap[i] = new MemoryMap
{
Address = rawMemoryMap.Address,
Length = rawMemoryMap.Length,
Type = rawMemoryMap.Type
};
}
return(entireMap);
}
/// <summary>
/// Get the Memory Map Information from Multiboot
/// </summary>
/// <returns>Returns an array of MemoryMaps containing the Multiboot Memory Map information. The array may have empty values at the end.</returns>
public static unsafe MemoryMap[] GetMemoryMap()
{
if (!MemoryMapExists())
{
throw new Exception("No Memory Map was returned by Multiboot");
}
var rawMap = new RawMemoryMap[64];
//var currentMap = (RawMemoryMap*)false;
int counter = 0;
/*while ((uint)currentMap < (Bootstrap.MultibootHeader->memMapAddress + Bootstrap.MultibootHeader->memMapLength) && counter < 64)
* {
* rawMap[counter++] = *currentMap;
* currentMap = (RawMemoryMap*)((uint*)currentMap + ((currentMap->Size + 4 )>> 2)); //The size is in bits, not bytes
* if (currentMap->Size == 0)
* {
* break;
* }
* }*/
if (counter >= 64)
{
throw new Exception("Memory Map returned too many segments");
}
var entireMap = new MemoryMap[counter];
for (int i = 0; i < counter; i++)
{
var rawMemoryMap = rawMap[i];
entireMap[i] = new MemoryMap
{
Address = (ulong)rawMemoryMap.HighBaseAddr << 32 | rawMemoryMap.LowBaseAddr,
Length = (ulong)rawMemoryMap.HighLength << 32 | rawMemoryMap.LowLength,
Type = rawMemoryMap.Type
};
}
return(entireMap);
}
