public PmemStack(PhysMem _pmem, nuint paddrbase, nuint len,
nuint _ssize = 4096)
{
pmem = _pmem;
ssize = _ssize;
// Calculate start addresse and length for the ring buffer structure
nuint sbasep = paddrbase;
nuint slen = len / _ssize * (nuint)sizeof(nuint);
// Create the ring buffer
rbs = new Collections.RingBuffer <nuint>((void *)pmem.vmem.Map(sbasep, slen, 0, 0).vaddr, (int)slen);
// Add the pages
nuint x = slen + sbasep;
x = util.align(x, ssize);
StartAddr = x;
Length = len - (x - paddrbase);
while (x + ssize <= paddrbase + len)
{
rbs.Enqueue(x);
x += ssize;
}
}
public PmemBitmap(PhysMem _pmem, nuint paddrbase, nuint len,
nuint _ssize = 4096)
{
pmem = _pmem;
ssize = _ssize;
// Calculate the size of the bitmap
bcount = (ulong)len / ssize;
ucount = util.align(bcount, 64) / 64;
// Zero out the array
bmp = (ulong *)pmem.vmem.Map(paddrbase, bcount, 0, 0).vaddr;
for (ulong i = 0; i < ucount; i++)
{
bmp[i] = 0UL;
}
// Add the used pages
var x = util.align(paddrbase + ucount * 8, ssize);
StartAddr = x;
Length = len - (x - paddrbase);
baddr = util.align(paddrbase, ssize);
while (x + ssize <= (ulong)paddrbase + (ulong)len)
{
var bit_idx = (x - baddr) / ssize;
var uidx = bit_idx / 64;
var bidx = bit_idx % 64;
bmp[uidx] |= (1UL) << (int)bidx;
x += ssize;
}
}
public PmemTwoLevelStack(PhysMem _pmem, nuint paddrbase, nuint len,
nuint _ssize = 4096, nuint _lsize = 2048 * 1024)
{
pmem = _pmem;
ssize = _ssize;
lsize = _lsize;
// Calculate start addresses and lengths for the ring buffer structure
nuint sbasep = paddrbase;
nuint slen = len / _ssize * (nuint)sizeof(nuint);
nuint lbasep = sbasep + slen;
nuint llen = len / _lsize * (nuint)sizeof(nuint);
// Create the ring buffers
rbs = new Collections.RingBuffer <nuint>((void *)pmem.vmem.Map(sbasep, slen, 0, 0).vaddr, (int)slen);
rbl = new Collections.RingBuffer <nuint>((void *)pmem.vmem.Map(lbasep, llen, 0, 0).vaddr, (int)llen);
// Add the pages, use small pages at either end and then large pages in the middle
nuint x = llen + lbasep;
x = util.align(x, ssize);
StartAddr = x;
Length = len - (x - paddrbase);
// This assumes page sizes are powers of 2
var lmask = lsize - 1;
// Small pages at start
while ((x & lmask) != 0 & (x + ssize <= paddrbase + len))
{
rbs.Enqueue(x);
x += ssize;
}
// Large pages in middle
while (x + lsize <= paddrbase + len)
{
rbl.Enqueue(x);
x += lsize;
}
// Small pages at end
while (x + ssize <= paddrbase + len)
{
rbs.Enqueue(x);
x += ssize;
}
// Debug
Formatter.Write("PmemTwoLevelStack: rbs count ", Program.arch.DebugOutput);
Formatter.Write((ulong)rbs.Count, Program.arch.DebugOutput);
Formatter.Write(", lbs count ", Program.arch.DebugOutput);
Formatter.Write((ulong)rbl.Count, Program.arch.DebugOutput);
Formatter.WriteLine(Program.arch.DebugOutput);
}