refactor: namespace restructure of entire codebase

Reorganize all source files into a hierarchical namespace structure
with dot-separated unit names matching directory paths.

Major changes:
- src/prog/ -> src/app/ (app.*.pas)
- src/fault/ -> src/arch/x86/fault/ (arch.x86.fault.*.pas)
- src/isr/ -> src/arch/x86/isr/ (arch.x86.isr.*.pas)
- src/include/ -> src/core/ (core.*.pas) + src/arch/x86/
- src/driver/ subtree reorganized with driver.* namespace prefixes
- src/driver/storage/con/ -> src/driver/storage/ctl/ (Windows reserved name fix)
- src/driver/storage/ split into con(ctl)/fs/vol/ subdirectories
- src/driver/net/ flattened from l1-l5 layers to driver.net.*.pas
- kernel.pas -> asuro.pas, faults.pas -> arch.x86.faults.pas
- stdio.pas/syslog.pas -> io/io.stdio.pas, io/io.syslog.pas
- processmanager.pas -> proc/proc.mgr.pas
- lmemorymanager.pas -> memory/memory.heap.pas
- Build scripts moved to toolchain/
- Added compat/ shims for lmemorymanager and types
- Added doc/namespace.md tracking the refactor

197 files changed, 6292 insertions(+), 5526 deletions(-)

src/app/app.meminfo.pas

@@ -0,0 +1,83 @@
+//  Copyright 2021 Kieron Morris
+//
+//  Licensed under the Apache License, Version 2.0 (the "License");
+//  you may not use this file except in compliance with the License.
+//  You may obtain a copy of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS,
+//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//  See the License for the specific language governing permissions and
+//  limitations under the License.
+
+{ 
+	Prog->app.meminfo - Print memory statistics (PMM / LMM).
+	
+	@author(Kieron Morris <[email protected]>)
+}
+unit app.meminfo;
+
+interface
+
+uses
+    io.stdio, arch.x86.multiboot, arch.x86.memory.physical, memory.heap, debug.tracer;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    pmm_total, pmm_free, pmm_used : uint32;
+    lmm_pages, lmm_free           : uint32;
+begin
+    { Multiboot memory info }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- Multiboot ---');
+    io.stdio.bufWriteStr(stdout_buf, 'Lower Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, multibootinfo^.mem_lower);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+    io.stdio.bufWriteStr(stdout_buf, 'Upper Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, multibootinfo^.mem_upper);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+    io.stdio.bufWriteStr(stdout_buf, 'Total Memory  : ');
+    io.stdio.bufWriteInt(stdout_buf, ((multibootinfo^.mem_upper + 1000) div 1024) + 1);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+
+    { PMM stats }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- PMM (4 MB blocks) ---');
+    pmm_total := arch.x86.memory.physical.pmm_total_blocks;
+    pmm_free  := arch.x86.memory.physical.pmm_free_blocks;
+    pmm_used  := pmm_total - pmm_free;
+    io.stdio.bufWriteStr(stdout_buf, 'Total Blocks  : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_total);
+    io.stdio.bufWriteStr(stdout_buf, 'Free Blocks   : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_free);
+    io.stdio.bufWriteStr(stdout_buf, 'Used Blocks   : ');
+    io.stdio.bufWriteIntLn(stdout_buf, pmm_used);
+    io.stdio.bufWriteStr(stdout_buf, 'Free Physical : ');
+    io.stdio.bufWriteInt(stdout_buf, pmm_free * 4);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+
+    { LMM heap stats }
+    io.stdio.bufWriteStrLn(stdout_buf, '--- LMM (Heap) ---');
+    lmm_pages := memory.heap.lmm_page_count;
+    lmm_free  := memory.heap.lmm_total_free;
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Pages    : ');
+    io.stdio.bufWriteIntLn(stdout_buf, lmm_pages);
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Size     : ');
+    io.stdio.bufWriteInt(stdout_buf, lmm_pages * 4);
+    io.stdio.bufWriteStrLn(stdout_buf, ' MB');
+    io.stdio.bufWriteStr(stdout_buf, 'Heap Free     : ');
+    io.stdio.bufWriteInt(stdout_buf, lmm_free div 1024);
+    io.stdio.bufWriteStrLn(stdout_buf, ' KB');
+end;
+
+procedure init();
+begin
+    debug.tracer.push_trace('meminfo.init');
+    io.stdio.registerCommand('MEMINFO', @Run, 'Print memory statistics (PMM/LMM).');
+end;
+
+end.