internal override bool InitGDBStub()
{
/* The gdb stub is predominantly interrupt driven - it is entered by:
*
* A #DB exception (INT 1)
* A #BP exception (INT 3)
*/
/* Set up the COM port */
// COM2 base port is 0x2f8
libsupcs.IoOperations.PortOut((ushort)(com2 + 1), (byte)0); // Disable interrupts
libsupcs.IoOperations.PortOut((ushort)(com2 + 3), (byte)0x80); // Set DLAB bit to allow us to set the baud rate
libsupcs.IoOperations.PortOut((ushort)(com2 + 0), (byte)0x03); // Set divisor to 3 (baud = 115200 / 3 = 38400), low byte
libsupcs.IoOperations.PortOut((ushort)(com2 + 1), (byte)0); // Divisor high byte
libsupcs.IoOperations.PortOut((ushort)(com2 + 3), (byte)0x3); // 8 data bits, no parity bit, 1 stop bit, clear DLAB
libsupcs.IoOperations.PortOut((ushort)(com2 + 2), (byte)0xc7); // Enable and clear the FIFOs
libsupcs.IoOperations.PortOut((ushort)(com2 + 4), (byte)0x0b); // Enable IRQs, set RTS/DSR
/* Register interrupt handlers */
unsafe
{
Interrupts.InstallHandler(1, new Interrupts.ISR(GDB_DB_handler));
Interrupts.InstallHandler(3, new Interrupts.ISR(GDB_BP_handler));
}
return(true);
}
internal override void Init(UIntPtr chunk_vaddr, UIntPtr chunk_length, Multiboot.Header mboot)
{
/* Set up an x86_64 environment */
/* Get the top of the stack
*
* cur_rbp points to prev_rbp (rbp within Main)
* [prev_rbp + 8] is the rip within tload
*/
unsafe
{
ulong cur_rbp = libsupcs.x86_64.Cpu.RBP;
ulong prev_rbp = *(ulong *)cur_rbp;
init_exit_address = *(ulong *)(prev_rbp + 8);
}
// Enable sse (used for virtftnptr stores and loads) - see Intel 3a:13.1.4
ulong cr4 = libsupcs.x86_64.Cpu.Cr4;
cr4 |= 0x200; // set cr4.OSFXSR
libsupcs.x86_64.Cpu.Cr4 = cr4;
cr4 |= 0x400; // set cr4.OSXMMXCPT
libsupcs.x86_64.Cpu.Cr4 = cr4;
ulong cr0 = libsupcs.x86_64.Cpu.Cr0;
cr0 |= 0x4;
cr0 ^= 0x4; // clear cr0.EM
libsupcs.x86_64.Cpu.Cr0 = cr0;
cr0 |= 0x2; // set cr0.MP
libsupcs.x86_64.Cpu.Cr0 = cr0;
cr0 |= (1 << 16); // set cr0.WP
libsupcs.x86_64.Cpu.Cr0 = cr0;
/* Set-up the MXCSR register
*
* We want to unmask all exceptions except the precision exception which is thrown if the
* result of an operation cannot be stored with complete precision in an xmm register,
* e.g. 1/3 - this happens frequently and is expected, so we don't not want to raise a #XM
* exception here. The precision mask is bit 12.
*
* We set the rounding mode (bits 13 and 14) to 00b which is round to even as the Math.Round
* function expects this mode
*
* All other bits are cleared.
*/
uint mxcsr = 0x1000;
libsupcs.x86_64.Cpu.Mxcsr = mxcsr;
/* Set up the memory managers */
bda_va = (ulong)chunk_vaddr;
pmem_bitmap_va = bda_va + 0x1000;
vmem_temppage_va = bda_va + 0x3000;
vga_fb_va = bda_va + 0x4000;
VirtMem = new Vmem();
PhysMem = new Pmem();
PhysMem.vmem = VirtMem;
Multiboot.MachineMinorType_x86 bios = (Multiboot.MachineMinorType_x86)mboot.machine_minor_type;
/* Set up the debug outputs */
DebugOutput = new SerialDebug();
/*if (mboot.has_vga && bios == Multiboot.MachineMinorType_x86.BIOS)
* {
* VirtMem.Map(0, 0x1000, bda_va, 0); // TODO: will this cause Map() to allocate a physical page?
* //VirtMem.map_page(bda_va, 0x0);
* BootInfoOutput = new Vga(bda_va, vga_fb_va, VirtMem);
* }
* else*/
BootInfoOutput = DebugOutput;
/* Say hi */
Formatter.WriteLine("Tysos x86_64 architecture initialising", DebugOutput);
// Only provide free pages to the memory allocator
var fmem = new List <EarlyPageProvider.EPPRegion>();
// Iterate through each free block
for (int i = 0; i < mboot.mmap.Length; i++)
{
Multiboot.MemoryMap cur_mmap = mboot.mmap[i];
if (IsUefiFreeMemory(cur_mmap.type))
{
// do not use first page
if (cur_mmap.base_addr < 0x1000)
{
if (cur_mmap.length < 0x1000)
{
continue;
}
cur_mmap.base_addr += 0x1000;
cur_mmap.length -= 0x1000;
}
// x is the current address to add
var x = util.align(cur_mmap.base_addr, 0x1000);
while (x < cur_mmap.base_addr + cur_mmap.length - 0x1000)
{
// is x in a used block?
bool in_used = false;
for (int j = 0; j < mboot.mmap.Length; j++)
{
Multiboot.MemoryMap cur_mmap2 = mboot.mmap[j];
if (!IsUefiFreeMemory(cur_mmap2.type))
{
if (x >= cur_mmap2.base_addr && x < (cur_mmap2.base_addr + cur_mmap2.length))
{
in_used = true;
// advance x
x = cur_mmap2.base_addr + cur_mmap2.length;
break;
}
}
}
if (in_used)
{
continue; // loop and check again if in used block
}
// Now we know we are not currently in a free block,
// but need to ensure we don't cross over the boundary of the next
// lowest block, so find this
while (true)
{
// Find lowest used block greater than or equal to x
ulong lowest_start = ulong.MaxValue;
ulong lowest_len = 0;
bool has_lowest = false;
for (int j = 0; j < mboot.mmap.Length; j++)
{
Multiboot.MemoryMap cur_mmap2 = mboot.mmap[j];
if (!IsUefiFreeMemory(cur_mmap2.type))
{
if (x < cur_mmap2.base_addr && cur_mmap2.base_addr < lowest_start)
{
has_lowest = true;
lowest_start = cur_mmap2.base_addr;
lowest_len = cur_mmap2.length;
}
}
}
// if the lowest block is outside the current block, ignore it
if (lowest_start >= (cur_mmap.base_addr + cur_mmap.length))
{
has_lowest = false;
}
// now, if has_lowest is true, we set the max here to it, else
// we use the total size of the free block, aligned down
ulong cur_block_max = (has_lowest ? lowest_start : (cur_mmap.base_addr + cur_mmap.length)) & ~0xFFFUL;
// Debug out
Formatter.Write("x86_64 PhysMem: adding block ", DebugOutput);
Formatter.Write(x, "X", DebugOutput);
Formatter.Write(" - ", DebugOutput);
Formatter.Write(cur_block_max, "X", DebugOutput);
Formatter.WriteLine(DebugOutput);
fmem.Add(new EarlyPageProvider.EPPRegion
{
start = x,
length = cur_block_max - x,
used = 0
});
// subtract a page size
cur_block_max -= 0x1000;
while (x <= cur_block_max)
{
//PhysMem.ReleasePage(x);
x += 0x1000;
}
Formatter.Write(x, "X", DebugOutput);
Formatter.WriteLine(DebugOutput);
// have we reached the end of the block?
if (x >= cur_mmap.base_addr + cur_mmap.length - 0x1000)
{
break;
}
else
{
// if not, we have hit a used block, skip on to after it
x = util.align(lowest_start + lowest_len, 0x1000);
}
}
}
}
}
// Use the free memory list to create a direct mapping of all physical memory
var pp = new EarlyPageProvider(fmem);
((Vmem)VirtMem).GenerateDirectMapping(fmem, pp);
Formatter.WriteLine("Direct physical memory mapping generated @ 0x0xffffff0000000000", DebugOutput);
// Now create the actual physical memory manager with the free blocks
PhysMem.vmem = VirtMem;
for (int i = 0; i < fmem.Count; i++)
{
var fmemi = fmem[i];
if (fmemi.length > fmemi.used + 0x2000)
{
PhysMem.Release(fmemi.start, fmemi.length - fmemi.used);
}
}
PageFault.pf_unwinder = new libsupcs.x86_64.Unwinder();
// Display success
Formatter.Write("Allocated: ", DebugOutput);
Formatter.Write(PhysMem.FreeSpace, DebugOutput);
Formatter.WriteLine(" B", DebugOutput);
VirtMem.pmem = PhysMem;
Formatter.Write("x86_64: mboot.max_tysos: ", DebugOutput);
Formatter.Write(mboot.max_tysos, "X", DebugOutput);
Formatter.Write(", tysos_virtaddr: ", DebugOutput);
Formatter.Write(mboot.tysos_virtaddr, "X", DebugOutput);
Formatter.Write(", tysos_size: ", DebugOutput);
Formatter.Write(mboot.tysos_size, "X", DebugOutput);
Formatter.WriteLine(DebugOutput);
/* Set up the virtual region allocator */
if (mboot.max_tysos != 0)
{
VirtualRegions = new Virtual_Regions(0, mboot.max_tysos);
}
else
{
VirtualRegions = new Virtual_Regions(mboot.tysos_virtaddr, mboot.tysos_size);
}
Formatter.WriteLine("x86_64: Virtual region allocator started", DebugOutput);
VirtualRegions.Dump(DebugOutput);
/* Set up interrupts */
ulong idt_start = VirtualRegions.Alloc(256 * 16, 0x1000, "idt");
VirtMem.Map(PhysMem.GetPage(), 0x1000, idt_start, VirtMem.FLAG_writeable);
Interrupts = new Interrupts(idt_start);
Formatter.WriteLine("x86_64: IDT allocated", DebugOutput);
unsafe
{
// Install the page fault handler
Interrupts.InstallHandler(14, new Interrupts.ISREC(PageFault.PFHandler));
// Install some default handlers
Interrupts.InstallHandler(0, new Interrupts.ISR(Exceptions.DivideError_0_Handler));
Interrupts.InstallHandler(1, new Interrupts.ISR(Exceptions.DebugError_1_Handler));
Interrupts.InstallHandler(2, new Interrupts.ISR(Exceptions.NMIError_2_Handler));
Interrupts.InstallHandler(3, new Interrupts.ISR(Exceptions.BreakPoint_3_Handler));
Interrupts.InstallHandler(4, new Interrupts.ISR(Exceptions.OverflowError_4_Handler));
Interrupts.InstallHandler(5, new Interrupts.ISR(Exceptions.BoundCheckError_5_Handler));
Interrupts.InstallHandler(6, new Interrupts.ISR(Exceptions.InvalidOpcode_6_Handler));
Interrupts.InstallHandler(7, new Interrupts.ISR(Exceptions.DeviceNotPresentError_7_Handler));
Interrupts.InstallHandler(8, new Interrupts.ISREC(Exceptions.DoubleFault_8_Handler));
Interrupts.InstallHandler(10, new Interrupts.ISREC(Exceptions.TSSError_10_Handler));
Interrupts.InstallHandler(11, new Interrupts.ISREC(Exceptions.SegmentNotPresentError_11_Handler));
Interrupts.InstallHandler(12, new Interrupts.ISREC(Exceptions.StackeFaultError_12_Handler));
Interrupts.InstallHandler(13, new Interrupts.ISREC(Exceptions.GeneralProtection_13_Handler));
Interrupts.InstallHandler(16, new Interrupts.ISR(Exceptions.FPUError_16_Handler));
Interrupts.InstallHandler(17, new Interrupts.ISREC(Exceptions.AlignmentCheck_17_Handler));
Interrupts.InstallHandler(18, new Interrupts.ISR(Exceptions.MachineCheckError_18_Handler));
Interrupts.InstallHandler(19, new Interrupts.ISR(Exceptions.SIMD_19_Handler));
}
Formatter.WriteLine("x86_64: Default exception handlers installed", DebugOutput);
/* Set up the tss and IST stacks */
ulong tss;
tss = VirtualRegions.Alloc(0x1000, 0x1000, "tss");
ulong[] ists = new ulong[7];
/* Create 2 ISTs with guard pages */
int ist_count = 2;
ulong ist_size = 0x2000;
ulong ist_guard_size = 0x1000;
for (int i = 0; i < ist_count; i++)
{
ulong ist_base = VirtualRegions.Alloc(ist_size + ist_guard_size, 0x1000, "IST");
ists[i] = ist_base + ist_guard_size + ist_size;
for (ulong addr = ist_base + ist_guard_size; addr < ist_base + ist_guard_size + ist_size; addr += 0x1000)
{
VirtMem.Map(PhysMem.GetPage(), 0x1000, addr, VirtMem.FLAG_writeable);
}
}
VirtMem.Map(PhysMem.GetPage(), 0x1000, tss, VirtMem.FLAG_writeable);
Tss.Init(tss, ists);
Formatter.WriteLine("x86_64: TSS installed", DebugOutput);
// Now inform the page fault and double fault handlers to use their own stack
unsafe
{
Interrupts.InstallHandler(14, new Interrupts.ISREC(PageFault.PFHandler), 1);
Interrupts.InstallHandler(8, new Interrupts.ISREC(Exceptions.DoubleFault_8_Handler), 2);
}
Formatter.WriteLine("x86_64: Page fault and double fault handlers installed", DebugOutput);
/* Set up the current cpu */
Virtual_Regions.Region cpu_reg = VirtualRegions.AllocRegion(0x8000, 0x1000, "BSP cpu", 0, Virtual_Regions.Region.RegionType.CPU_specific, true);
VirtMem.Map(PhysMem.GetPage(), 0x1000, cpu_reg.start, VirtMem.FLAG_writeable);
x86_64_cpu bsp = new x86_64_cpu(cpu_reg);
bsp.InitCurrentCpu();
cpu_structure_setup = true;
// Set up the page fault handler's stack switching mechanism
/*ulong pfault_ist_block = VirtualRegions.Alloc(VirtMem.page_size * 7, VirtMem.page_size, "PageFault ISTs");
* List<ulong> pfault_ists = new List<ulong>();
* pfault_ists.Add(ist_block + VirtMem.page_size);
* for (int i = 0; i < 7; i++)
* {
* VirtMem.map_page(pfault_ist_block + (ulong)i * VirtMem.page_size);
* pfault_ists.Add(pfault_ist_block + (ulong)(i + 1) * VirtMem.page_size);
* }
* PageFault.cur_ist_idx = 0;
* PageFault.tss_addr = tss_start;
* PageFault.ist1_offset = (ulong)(((libsupcs.TysosField)typeof(tysos.x86_64.Tss.Tss_struct).GetField("ist1")).Offset);
* PageFault.ist_stack = pfault_ists;*/
/* Test the gengc */
Formatter.WriteLine("x86_64: testing gengc", Program.arch.DebugOutput);
gc.gengc.heap = new gc.gengc();
Formatter.Write("gengc object created @ ", Program.arch.DebugOutput);
Formatter.Write(libsupcs.CastOperations.ReinterpretAsUlong(gc.gengc.heap), "X", Program.arch.DebugOutput);
Formatter.WriteLine(Program.arch.DebugOutput);
unsafe
{
gc.gengc.heap.Init((void *)heap_small_start, (void *)heap_long_end);
/* Initial roots are the current stack, all static fields and the original heap */
gc.gengc.heap.AddRoots((byte *)mboot.stack_low, (byte *)mboot.stack_high);
gc.gengc.heap.AddRoots((byte *)mboot.tysos_static_start, (byte *)mboot.tysos_static_end);
gc.gengc.heap.AddRoots((byte *)mboot.heap_start, (byte *)mboot.heap_end);
}
Formatter.WriteLine("heap initialized", Program.arch.DebugOutput);
int[] test_array = new int[] { 8, 8, 8, 8, 8, 8, 8 };
Formatter.WriteLine("test array created", Program.arch.DebugOutput);
gc.gc.Heap = gc.gc.HeapType.GenGC;
Formatter.WriteLine("heap set to gengc", Program.arch.DebugOutput);
for (int i = 0; i < test_array.Length; i++)
{
Formatter.Write((ulong)i, Program.arch.DebugOutput);
Formatter.Write(": size ", Program.arch.DebugOutput);
Formatter.Write((ulong)test_array[i], Program.arch.DebugOutput);
Formatter.Write(" returns ", Program.arch.DebugOutput);
ulong addr = gc.gc.Alloc((ulong)test_array[i]);
Formatter.Write(addr, "X", Program.arch.DebugOutput);
Formatter.WriteLine(Program.arch.DebugOutput);
}
// Now point the heap to its proper location
//ulong heap_start = 0xFFFF800000000000;
//ulong heap_len = 0xFFFFFF8000000000 - heap_start;
//gc.heap.Init(heap_start, heap_len);
/*Formatter.Write("x86_64: setting heap to final location: ", Program.arch.DebugOutput);
* Formatter.Write(heap_small_start, "X", Program.arch.DebugOutput);
* Formatter.Write(" - ", Program.arch.DebugOutput);
* Formatter.Write(heap_long_end, "X", Program.arch.DebugOutput);
* Formatter.Write(" ", Program.arch.DebugOutput);
*
#if NO_BOEHM
#if NO_TYSOSGC
* gc.gc.Heap = gc.gc.HeapType.Startup;
* gc.simple_heap.Init(heap_small_start, heap_long_end);
#else
* gc.gc.Heap = gc.gc.HeapType.TysosGC;
* gc.heap.Init(heap_small_cutoff, heap_small_start, heap_small_end, heap_long_start, heap_long_end);
#endif
#else
* gc.boehm.InitHeap(heap_small_start, heap_long_end);
* gc.gc.Heap = gc.gc.HeapType.BoehmGC;
#endif
*
* Formatter.WriteLine("done", Program.arch.DebugOutput);
* Formatter.Write("x86_64: new heap of type ", Program.arch.DebugOutput);
* Formatter.WriteLine(gc.gc.Heap.ToString(), Program.arch.DebugOutput); */
/* Test a dictionary */
var dtest = new Dictionary <int, int>(new Program.MyGenericEqualityComparer <int>());
dtest[2] = 42;
var dout = dtest[2];
Formatter.Write("x86_64: dictionary test: ", DebugOutput);
Formatter.Write((ulong)dout, DebugOutput);
Formatter.WriteLine(DebugOutput);
/* Test enum comparer */
var enumcomp = new metadata.GenericEqualityComparerEnum <metadata.MetadataStream.TableId>();
if (enumcomp.Equals(metadata.MetadataStream.TableId.Assembly, metadata.MetadataStream.TableId.Assembly))
{
Formatter.WriteLine("x86_64: enumcomp test passed", DebugOutput);
}
else
{
Formatter.WriteLine("x86_64: enumcomp test failed", DebugOutput);
}
/* Test an enum dictionary */
var dtest2 = new Dictionary <metadata.MetadataStream.TableId, int>(new metadata.GenericEqualityComparerEnum <metadata.MetadataStream.TableId>());
dtest2[metadata.MetadataStream.TableId.TypeDef] = 42;
var dout2 = dtest2[metadata.MetadataStream.TableId.TypeDef];
Formatter.Write("x86_64: enum dictionary test: ", DebugOutput);
Formatter.Write((ulong)dout, DebugOutput);
Formatter.WriteLine(DebugOutput);
/* Test MetadataStream ctor */
Formatter.WriteLine("x86_64: Testing metadata ctor", DebugOutput);
var mtest = new metadata.MetadataStream();
Formatter.WriteLine("x86_64: done", DebugOutput);
/* Set-up the architecture for the JIT engine */
jit.Jit.t = libtysila5.target.Target.targets["x86_64"];
jit.Jit.t.Options["mcmodel"] = "large";
jit.Jit.t.InitIntcalls();
jit.Jit.bness = binary_library.Bitness.Bits64;
jit.Jit.jsa = new JitStubAssembler();
/* Initialize firmware */
switch (bios)
{
case Multiboot.MachineMinorType_x86.UEFI:
fwconf = new UEFI(VirtualRegions, VirtMem, mboot.virt_bda);
break;
case Multiboot.MachineMinorType_x86.BIOS:
fwconf = new BIOS(VirtualRegions, VirtMem, mboot.virt_bda);
break;
default:
throw new Exception("Unsupported firmware: " + bios.ToString());
}
/* Load ACPI tables */
Acpi acpi = new Acpi(VirtualRegions, VirtMem, fwconf);
//tysos.x86_64.Acpi acpi = new tysos.x86_64.Acpi(VirtualRegions, VirtMem,
// (bios == Multiboot.MachineMinorType_x86.BIOS) ? bda_va : mboot.virt_bda,
// bios);
/* Disable the PIC if we have one */
if ((acpi.Apic != null) && (acpi.Apic.Has8259))
{
tysos.x86_64.PIC_8295a.Disable();
}
/* Set up the local apic for the current processor */
tysos.x86_64.LApic bsp_lapic = new tysos.x86_64.LApic(VirtualRegions, VirtMem);
/* Calibrate the lapic */
if (acpi.Hpet == null)
{
bsp_lapic.CalibrateDirectly(133000000.0);
}
else
{
tysos.x86_64.Hpet hpet = new tysos.x86_64.Hpet(VirtualRegions, VirtMem, acpi.Hpet.paddr);
bsp_lapic.CalibrateTimerWithHpet(hpet, 1000000);
}
bsp_lapic.SetSpuriousVector(0x60);
unsafe
{
Interrupts.InstallHandler(0x60, new Interrupts.ISR(tysos.x86_64.LApic.SpuriousApicInterrupt));
}
bsp_lapic.SetTimer(true, 100.0, 0x40); // 10 ms timer
//bsp_lapic.SetTimer(true, 0x144b50, 0x40); // 10ms timer with 133 Mhz bus and divisor 1, interrupt vector 0x40
unsafe
{
Interrupts.InstallHandler(0x40, new Interrupts.ISR(tysos.x86_64.LApic.TimerInterrupt));
}
SchedulerTimer = bsp_lapic;
/* Set up the current cpu */
bsp.CurrentLApic = bsp_lapic;
Processors = new List <Cpu>();
Processors.Add(Program.arch.CurrentCpu);
/* Set up the task switcher */
Switcher = new tysos.x86_64.TaskSwitcher();
/* Now we have a working heap we can set up the rest of the physical memory */
//SetUpHighMemory(this.PhysMem, mboot);
/* Finally, create a list of parameters for handing to the system device enumerator */
if (acpi == null)
{
throw new Exception("ACPI required");
}
ps = new List <tysos.lib.File.Property>();
ps.Add(new tysos.lib.File.Property {
Name = "driver", Value = "acpipc"
});
foreach (Acpi.AcpiTable table in acpi.tables)
{
string tab_name = "table_" + table.signature.ToString("X8");
ps.Add(new tysos.lib.File.Property {
Name = tab_name, Value = new VirtualMemoryResource64(table.start_vaddr, table.length)
});
}
ps.Add(new tysos.lib.File.Property {
Name = "vmem", Value = new VirtualMemoryResource64(VirtualRegions.devs.start, VirtualRegions.devs.length)
});
ps.Add(new tysos.lib.File.Property {
Name = "pmem", Value = new PhysicalMemoryResource64(0, UInt64.MaxValue)
});
ps.Add(new tysos.lib.File.Property {
Name = "io", Value = new x86_64.IOResource(0, 0x10000)
});
Formatter.WriteLine("x86_64: Arch initialized", Program.arch.DebugOutput);
}