doc/planning/memoryallocator.md

@@ -205,7 +205,7 @@ Key constants:
 - `DATA_OFFSET = $10000` — data area starts at 64 KB into each page
 - `LARGE_ALLOC_MAGIC = $FFFFFFFE` — sentinel for klalloc'd multi-page allocations
 
-Interrupt safety: `pushfd; cli; pop saved_flags` (stack-balanced) + `restore_if(saved_flags)`
+Interrupt safety: `pushfd; cli; pop saved_flags` (stack-balanced) + `arch.platform.cpu.unlock(saved_flags)`
 inline procedure that only restores IF via `sti`, avoiding dangerous EFLAGS restoration
 (IOPL, NT, VM, AC bits that caused Bad-TSS on IRET).
 
@@ -256,7 +256,7 @@ list, fixes Search_Page, calls `free_page_at_address`). Skips Root_Page.
 
 | Bug | Root Cause | Fix |
 |-----|-----------|-----|
-| Bad TSS exception during network processing | `pushfd`/`popfd` across separate asm blocks: FPC doesn't track ESP changes in asm, causing EFLAGS corruption (NT=1, IOPL wrong) → Bad TSS on IRET | Stack-balanced `pushfd; cli; pop local_var` + `restore_if()` that only does `sti` if IF was set |
+| Bad TSS exception during network processing | `pushfd`/`popfd` across separate asm blocks: FPC doesn't track ESP changes in asm, causing EFLAGS corruption (NT=1, IOPL wrong) → Bad TSS on IRET | Stack-balanced `pushfd; cli; pop local_var` + `arch.platform.cpu.unlock()` that only does `sti` if IF was set |
 | GPF from SSE MOVAPS in doublebuffer flush | `SIZE_PREFIX=4`→8 gave 8-byte alignment; `MOVAPS` needs 16-byte. `klalloc` returned `page+8` (not 16-aligned) | `SIZE_PREFIX=16` (4B size + 12B pad), klalloc header expanded to 16 bytes |
 | Pages never freed (historic) | `free_page` extracted wrong block index from PDE Address field | Fixed extraction to `Address SHR 10` — page freeing works for the first time |
 

doc/src/memory/memory.heap.md

@@ -19,7 +19,7 @@ Every allocation is preceded by a 16-byte prefix: 4 bytes for the unit count, 12
 
 Allocations larger than a single heap page's capacity are handled by `klalloc`, which maps contiguous virtual pages and stores a magic sentinel (`$FFFFFFFE`) in the header so `kfree` can identify them and call `klfree` instead of the normal bitmap path.
 
-`kalloc` and `kfree` disable interrupts for the duration of their critical sections using a stack-balanced `pushfd`/`cli`/`pop` sequence and restore the interrupt flag via `restore_if` on all exit paths.
+`kalloc` and `kfree` disable interrupts for the duration of their critical sections using a stack-balanced `pushfd`/`cli`/`pop` sequence and restore the interrupt flag via `arch.platform.cpu.unlock` on all exit paths.
 
 ## Dependencies
 
@@ -132,7 +132,7 @@ Returns the number of heap pages currently in the linked list.
 
 ## Notes
 
-The `restore_if` helper checks bit 9 (IF) of the saved EFLAGS word and issues `STI` only if interrupts were enabled on entry. It uses `STI` rather than `POPFD` to avoid restoring potentially dangerous EFLAGS bits (IOPL, NT, VM, AC) that could trigger a General Protection Fault or Bad-TSS on the next `IRET`.
+The `arch.platform.cpu.unlock` helper checks bit 9 (IF) of the saved EFLAGS word and issues `STI` only if interrupts were enabled on entry. It uses `STI` rather than `POPFD` to avoid restoring potentially dangerous EFLAGS bits (IOPL, NT, VM, AC) that could trigger a General Protection Fault or Bad-TSS on the next `IRET`.
 
 When `DEBUG_LMM` is defined, `kalloc` allocates one additional unit and writes `GUARD_MAGIC` at the end of the allocation. `kfree` verifies this sentinel before freeing; a mismatch triggers a GPF with a syslog error, catching buffer overruns at free time.
 

src/arch/common/arch.common.legacyirq.pas

@@ -12,34 +12,61 @@
 
 { Shared PC interrupt-controller programming. Call with interrupts disabled. }
 unit arch.common.legacyirq;
+
 interface
 const
     PIT_INPUT_HZ = 1193182;
     PIT_DIVISOR = 149;
 procedure remap(masterMask, slaveMask: uint8);
 procedure masks(masterMask, slaveMask: uint8);
+procedure enableLine(line: uint8);
 procedure timerStart;
 function realIRQ(line: uint8): boolean;
 procedure acknowledge(line: uint8);
+
 implementation
 uses arch.platform.cpu;
+
 procedure writeSlow(port: uint16; value: uint8);
 begin
     outb(port, value);
     outb($80, 0);
 end;
+
 procedure masks(masterMask, slaveMask: uint8);
 begin
-    writeSlow($21, masterMask); writeSlow($A1, slaveMask);
+    writeSlow($21, masterMask);
+    writeSlow($A1, slaveMask);
 end;
+
 procedure remap(masterMask, slaveMask: uint8);
 begin
-    writeSlow($20, $11); writeSlow($A0, $11);
-    writeSlow($21, $20); writeSlow($A1, $28);
-    writeSlow($21, $04); writeSlow($A1, $02);
-    writeSlow($21, $01); writeSlow($A1, $01);
+    writeSlow($20, $11);
+    writeSlow($A0, $11);
+    writeSlow($21, $20);
+    writeSlow($A1, $28);
+    writeSlow($21, $04);
+    writeSlow($A1, $02);
+    writeSlow($21, $01);
+    writeSlow($A1, $01);
     masks(masterMask, slaveMask);
 end;
+
+procedure enableLine(line: uint8);
+var
+    flags: PtrUInt;
+begin
+    if line >= 16 then exit;
+    flags := arch.platform.cpu.lock;
+    if line < 8 then
+        outb($21, inb($21) and not uint8(1 shl line))
+    else begin
+        outb($A1, inb($A1) and not uint8(1 shl (line - 8)));
+        outb($21, inb($21) and not uint8(4));
+    end;
+    arch.platform.cpu.unlock(flags);
+end;
+
 procedure timerStart;
 begin
     { Channel 0, low/high byte, mode 2, binary. }
@@ -47,6 +74,7 @@ begin
     outb($40, PIT_DIVISOR and $FF);
     outb($40, PIT_DIVISOR shr 8);
 end;
+
 function realIRQ(line: uint8): boolean;
 begin
     realIRQ := line < 16;
@@ -60,6 +88,7 @@ begin
         if not realIRQ then outb($20, $20);
     end;
 end;
+
 procedure acknowledge(line: uint8);
 begin
     if line >= 16 then exit;

src/arch/common/platform.cpu.inc

@@ -15,6 +15,16 @@ function lock: PtrUInt;
 procedure unlock(flags: PtrUInt);
 procedure outb(port: uint16; value: uint8);
 function inb(port: uint16): uint8;
+procedure outw(port: uint16; value: uint16);
+function inw(port: uint16): uint16;
 procedure copyBytes(source, dest: PtrUInt; bytes: SizeUInt);
 procedure zero(dest: pointer; bytes: SizeUInt);
 procedure idle;
+procedure outl(port: uint16; value: uint32);
+function inl(port: uint16): uint32;
+
+type
+    TCPURegisters = record
+        eax, ebx, ecx, edx: uint32;
+    end;
+procedure queryCPU(leaf, subleaf: uint32; var registers: TCPURegisters);

src/arch/common/platform.interrupts.inc

@@ -10,14 +10,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-unit arch.common.interrupts;
-interface
-function lock: PtrUInt;
-procedure unlock(flags: PtrUInt);
-implementation
-uses arch.platform.cpu;
-function lock: PtrUInt;
-begin lock := arch.platform.cpu.lock; end;
-procedure unlock(flags: PtrUInt);
-begin arch.platform.cpu.unlock(flags); end;
-end.
+type
+    TIRQHandler = procedure;
+    TTimerHandler = procedure(data: void);
+procedure registerIRQ(vector: uint8; handler: TIRQHandler);
+procedure registerTimer(handler: TTimerHandler);
+procedure routePCI(line, vector: uint8);
+function timerTicks: uint64;

src/arch/common/platform.memory.inc

@@ -15,4 +15,7 @@ function allocateHeapPage: PtrUInt;
 function allocateLarge(pages: uint32): PtrUInt;
 procedure release(address: PtrUInt; pages: uint32);
 function identityReserve(address: PtrUInt): pointer;
-function freeBacking: uint64;
+function freePhysicalBytes: uint64;
+function totalPhysicalBytes: uint64;
+function physicalAddress(address: PtrUInt): uint64;
+function mapDevice(address: uint64; bytes: SizeUInt): pointer;

src/arch/common/system.init.inc

@@ -0,0 +1,33 @@
+// Copyright 2021 Kieron Morris & Aaron Hance
+// Copyright 2026 Aaron Hance
+//
+// 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.
+
+{ Shared dispatch for the table emitted by compile_initcalls.sh.
+  Initializers only register boot work or set globals; they cannot depend on
+  heap, hardware setup, or the alphabetical order of this generated table. }
+var
+    unitsInitialized: boolean;
+
+procedure initializeUnits;
+var
+    i: longint;
+    entry: CodePointer;
+begin
+    if unitsInitialized then exit;
+    unitsInitialized := true;
+
+    for i := 1 to InitFinalTable.TableCount do begin
+        entry := InitFinalTable.Procs[i].InitProc;
+        if entry <> nil then
+            TProcedure(entry)();
+    end;
+end;

src/arch/x86/arch.x86.console.pas

@@ -12,10 +12,13 @@
 
 { Commands extracted from io.stdio (Kieron Morris). }
 unit arch.x86.console;
+
 interface
 procedure init;
+
 implementation
 uses io.stdio, core.version, driver.timer.rtc, arch.x86.util;
+
 procedure cmd_version(params: PParamList; stdin_buf, stdout_buf, stderr_buf: POutBuf);
 begin
     bufWriteStr(stdout_buf, '  Asuro Version: ');

src/arch/x86/arch.x86.multiboot.pas

@@ -38,7 +38,7 @@ type
     Pmemory_map_t = boot.multiboot.Pmemory_map_t;
 
 var
-   multibootinfo  : Pmultiboot_info_t = nil;
+   multibootinfo  : Pmultiboot_info_t absolute boot.multiboot.multibootinfo;
    multibootmagic : uint32;
 
 implementation

src/arch/x86/arch.x86.util.pas

@@ -62,7 +62,6 @@ procedure resetSystem();
 
 function getESP : uint32;
 
-function RolDWord(AValue : uint32; Dist : uint8) : uint32;
 function RorDWord(AValue : uint32; Dist : uint8) : uint32;
 
 function MsSinceSystemBoot : uint64;
@@ -380,29 +379,6 @@ begin
     getTSC:= (hi SHL 32) OR lo;
 end;
 
-function RolDWord(AValue : uint32; Dist : uint8) : uint32;
-var
-    result : uint32;
-    i      : uint8;    
-
-begin
-    result:= AValue;
-    asm
-        PUSH EAX
-    end;
-    for i:=0 to Dist-1 do begin
-        asm
-            MOV EAX, result
-            ROL EAX, 1
-            MOV result, EAX
-        end;
-    end;
-    asm
-        POP EAX
-    end;
-    RolDWord:= result;
-end;
-
 function RorDWord(AValue : uint32; Dist : uint8) : uint32;
 var
     result : uint32;

src/arch/x86/platform/arch.platform.cpu.pas

@@ -12,29 +12,67 @@
 
 { Build-selected x86 adapter. }
 unit arch.platform.cpu;
+
 interface
 {$i ../../common/platform.cpu.inc}
+
 implementation
 uses arch.x86.util, memory.raw;
+
 function lock: PtrUInt; assembler; nostackframe;
-asm pushfd; cli; pop eax end;
+asm
+    pushfd;
+    cli;
+    pop eax
+end;
+
 procedure unlock(flags: PtrUInt);
-begin if (flags and $200) <> 0 then asm sti end; end;
+begin
+    if (flags and $200) <> 0 then asm
+        sti
+    end;
+end;
+
 procedure idle;
-begin asm hlt end; end;
+begin
+    asm
+        hlt
+    end;
+end;
+
 procedure outb(port: uint16; value: uint8);
-begin arch.x86.util.outb(port, value); end;
+begin
+    arch.x86.util.outb(port, value);
+end;
+
 function inb(port: uint16): uint8;
-begin inb := arch.x86.util.inb(port); end;
+begin
+    inb := arch.x86.util.inb(port);
+end;
+
 procedure copyBytes(source, dest: PtrUInt; bytes: SizeUInt);
 begin
     if bytes >= 16 then arch.x86.util.__REP_MOVSB_memcpy(source, dest, bytes)
     else memory.raw.move(pointer(source), pointer(dest), bytes);
 end;
-procedure zero(dest: pointer; bytes: SizeUInt);
-var d: pointer; b: SizeUInt;
+
+procedure outw(port: uint16; value: uint16);
 begin
-    d := dest; b := bytes;
+    arch.x86.util.outw(port, value);
+end;
+
+function inw(port: uint16): uint16;
+begin
+    inw := arch.x86.util.inw(port);
+end;
+
+procedure zero(dest: pointer; bytes: SizeUInt);
+var
+    d: pointer;
+    b: SizeUInt;
+begin
+    d := dest;
+    b := bytes;
     if b = 0 then exit;
     asm
         push edi
@@ -50,4 +88,29 @@ begin
         pop edi
     end;
 end;
+procedure outl(port: uint16; value: uint32);
+begin
+    arch.x86.util.outl(port, value);
+end;
+
+function inl(port: uint16): uint32;
+begin
+    inl := arch.x86.util.inl(port);
+end;
+
+procedure queryCPU(leaf, subleaf: uint32; var registers: TCPURegisters); assembler; nostackframe;
+asm
+    push ebx
+    push edi
+    mov edi, ecx
+    mov ecx, edx
+    cpuid
+    mov [edi], eax
+    mov [edi + 4], ebx
+    mov [edi + 8], ecx
+    mov [edi + 12], edx
+    pop edi
+    pop ebx
+end;
+
 end.

src/arch/x86/platform/arch.platform.diagnostics.pas

@@ -12,22 +12,39 @@
 
 { Build-selected x86 adapter. }
 unit arch.platform.diagnostics;
+
 interface
 {$i ../../common/platform.diagnostics.inc}
+
 implementation
 uses io.syslog, debug.tracer, core.panic;
+
 procedure log(tag, message: pchar);
-begin io.syslog.logln(tag, message); end;
+begin
+    io.syslog.logln(tag, message);
+end;
+
 procedure push_trace(name: pchar);
-begin debug.tracer.push_trace(name); end;
+begin
+    debug.tracer.push_trace(name);
+end;
+
 procedure pop_trace;
-begin debug.tracer.pop_trace; end;
+begin
+    debug.tracer.pop_trace;
+end;
+
 procedure fatal(tag, message: pchar);
-begin core.panic.panic(tag, message, nil); end;
+begin
+    core.panic.panic(tag, message, nil);
+end;
+
 procedure testSummary(tag, passedKey, failedKey: pchar; passed, failed: uint32);
 begin
     io.syslog.log(tag, '');
-    io.syslog.writeint(passed); io.syslog.writestring(' passed, ');
-    io.syslog.writeint(failed); io.syslog.writestringln(' failed.');
+    io.syslog.writeint(passed);
+    io.syslog.writestring(' passed, ');
+    io.syslog.writeint(failed);
+    io.syslog.writestringln(' failed.');
 end;
 end.

src/arch/x86/platform/arch.platform.interrupts.pas

@@ -0,0 +1,47 @@
+// Copyright 2026 Aaron Hance
+//
+// 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.
+
+unit arch.platform.interrupts;
+
+interface
+{$i ../../common/platform.interrupts.inc}
+
+implementation
+uses arch.x86.isr.mgr, arch.x86.isr.tmr0, arch.x86.isr.ioapic,
+    arch.x86.bda, arch.platform.cpu;
+
+function timerTicks: uint64;
+var
+    flags: PtrUInt;
+begin
+    flags := arch.platform.cpu.lock;
+    timerTicks := Counters.c64;
+    arch.platform.cpu.unlock(flags);
+end;
+
+procedure registerIRQ(vector: uint8; handler: TIRQHandler);
+begin
+    arch.x86.isr.mgr.registerISR(vector, handler);
+end;
+
+procedure registerTimer(handler: TTimerHandler);
+begin
+    arch.x86.isr.tmr0.hook(PtrUInt(handler));
+end;
+
+procedure routePCI(line, vector: uint8);
+begin
+    arch.x86.isr.ioapic.init;
+    arch.x86.isr.ioapic.route_pci_irq(line, vector);
+end;
+
+end.

src/arch/x86/platform/arch.platform.memory.pas

@@ -12,25 +12,33 @@
 
 { Mapping policy extracted from memory.heap (Kieron Morris). }
 unit arch.platform.memory;
+
 interface
 const MAX_HEAP_REGIONS = 256;
 {$i ../../common/platform.memory.inc}
+
 implementation
 uses arch.x86.memory.virtual, arch.x86.memory.physical, arch.platform.diagnostics;
+
 function allocateHeapPage: PtrUInt;
-var i: uint32;
+var
+    i: uint32;
 begin
     allocateHeapPage := 0;
     i := KERNEL_PAGE_NUMBER + 4;
     while i < 1024 do begin
         if arch.x86.memory.virtual.new_page(i) then begin
-            allocateHeapPage := i shl 22; exit;
+            allocateHeapPage := i shl 22;
+            exit;
         end;
         inc(i);
     end;
 end;
+
 function allocateLarge(pages: uint32): PtrUInt;
-var curr_page, i: uint16; miss: boolean;
+var
+    curr_page, i: uint16;
+    miss: boolean;
 begin
     allocateLarge := 0;
     if (pages = 0) or (pages > MAX_HEAP_REGIONS) then exit;
@@ -39,7 +47,9 @@ begin
         miss := false;
         for i := 0 to pages - 1 do begin
             if not page_mappable(curr_page + i) then begin
-                miss := true; curr_page := curr_page + i; break;
+                miss := true;
+                curr_page := curr_page + i;
+                break;
             end;
         end;
         if not miss then begin
@@ -47,7 +57,8 @@ begin
             while i < pages do begin
                 if not arch.x86.memory.virtual.new_page(curr_page + i) then begin
                     while i > 0 do begin
-                        dec(i); arch.x86.memory.virtual.free_page(curr_page + i);
+                        dec(i);
+                        arch.x86.memory.virtual.free_page(curr_page + i);
                     end;
                     exit;
                 end;
@@ -59,23 +70,57 @@ begin
         inc(curr_page);
     end;
 end;
+
 procedure release(address: PtrUInt; pages: uint32);
-var i: uint32; page_num: uint16;
+var
+    i: uint32;
+    page_num: uint16;
 begin
     if (pages = 0) or (pages > MAX_HEAP_REGIONS) then begin
-        fatal('LMM', 'Invalid heap region release'); exit;
+        fatal('LMM', 'Invalid heap region release');
+        exit;
     end;
     page_num := address shr 22;
     for i := 0 to pages - 1 do arch.x86.memory.virtual.free_page(page_num + uint16(i));
 end;
+
 function identityReserve(address: PtrUInt): pointer;
-var block: uint16;
+var
+    block: uint16;
 begin
     block := address shr 22;
     force_alloc_block(block, 0);
     map_page(block, block);
     identityReserve := pointer(uint32(block) shl 22);
 end;
-function freeBacking: uint64;
-begin freeBacking := pmm_free_blocks; end;
+
+function freePhysicalBytes: uint64;
+begin
+    freePhysicalBytes := uint64(pmm_free_blocks) * $400000;
+end;
+
+function totalPhysicalBytes: uint64;
+begin
+    totalPhysicalBytes := uint64(pmm_total_blocks) * $400000;
+end;
+function physicalAddress(address: PtrUInt): uint64;
+begin
+    physicalAddress := arch.x86.memory.virtual.vtop(address);
+end;
+
+function mapDevice(address: uint64; bytes: SizeUInt): pointer;
+var
+    page, last: uint32;
+begin
+    mapDevice := nil;
+    if (bytes = 0) or (address > $FFFFFFFF) or (bytes - 1 > $FFFFFFFF - address) then exit;
+    page := uint32(address) shr 22;
+    last := uint32(address + bytes - 1) shr 22;
+    while page <= last do begin
+        identityReserve(page shl 22);
+        inc(page);
+    end;
+    mapDevice := pointer(PtrUInt(address));
+end;
+
 end.

src/arch/x86/platform/arch.platform.process.pas

@@ -12,12 +12,20 @@
 
 { Build-selected x86 adapter. }
 unit arch.platform.process;
+
 interface
 {$i ../../common/platform.process.inc}
+
 implementation
 uses arch.x86.proc.context, arch.x86.bda;
+
 function prepare(stack: pointer; bytes: SizeUInt; entry: pointer): PtrUInt;
-begin prepare := arch.x86.proc.context.prepare(stack, bytes, entry); end;
+begin
+    prepare := arch.x86.proc.context.prepare(stack, bytes, entry);
+end;
+
 function timerTicks: uint32;
-begin timerTicks := PUInt32(@Counters.c32)^; end;
+begin
+    timerTicks := PUInt32(@Counters.c32)^;
+end;
 end.

src/arch/x86/proc/arch.x86.proc.context.pas

@@ -12,12 +12,17 @@
 
 { i386 initial frame, extracted from proc.mgr (Kieron Morris). }
 unit arch.x86.proc.context;
+
 interface
 function prepare(stack: pointer; bytes: SizeUInt; entry: pointer): PtrUInt;
+
 implementation
 uses memory.raw;
+
 function prepare(stack: pointer; bytes: SizeUInt; entry: pointer): PtrUInt;
-var top, frame: PtrUInt; i: uint32;
+var
+    top, frame: PtrUInt;
+    i: uint32;
 begin
     prepare := 0;
     if (stack = nil) or (entry = nil) or (bytes < 64) or

src/arch/x86/system.pas

@@ -119,7 +119,6 @@ function Round(d: Double): int64;
 implementation
 
 { ---- Raw driver.io.serial debug helpers (COM1 $3F8, no dependencies) ---- }
-
 procedure serial_putch(ch: char); assembler;
 asm
     push edx
@@ -154,7 +153,8 @@ begin
 end;
 
 procedure serial_putstr(s: pchar);
-var i: uint32;
+var
+    i: uint32;
 begin
     i := 0;
     while s[i] <> #0 do begin
@@ -196,20 +196,11 @@ begin
     end;
 end;
 
+{$i ../common/system.init.inc}
+
 procedure fpc_initializeunits; [public, alias: 'FPC_INITIALIZEUNITS']; compilerproc;
-var
-    i    : longint;
-    proc : CodePointer;
 begin
-    { Walk the compiler-generated INITFINAL table and call each unit's
-      initialization procedure (if non-nil).  This runs before kmain, so
-      initialization sections must only do trivial work — write to static
-      globals, register boot entries, etc.  No I/O or heap allocation. }
-    for i := 1 to InitFinalTable.TableCount do begin
-        proc := InitFinalTable.Procs[i].InitProc;
-        if proc <> nil then
-            TProcedure(proc)();
-    end;
+    initializeUnits;
 end;
 
 procedure fpc_do_exit; [public, alias: 'FPC_DO_EXIT']; compilerproc;
@@ -348,7 +339,8 @@ begin
 end;
 
 function fpc_mul_dword_to_qword(f1, f2: uint32): qword; [public, alias: 'FPC_MUL_DWORD_TO_QWORD']; compilerproc;
-var res: qword;
+var
+    res: qword;
 begin
     asm
         MOV EAX, f1
@@ -368,8 +360,10 @@ procedure udiv64(dividendLo, dividendHi, divisorLo, divisorHi: uint32;
 var
     bit: longint;
 begin
-    quotLo := 0; quotHi := 0;
-    remLo  := 0; remHi  := 0;
+    quotLo := 0;
+    quotHi := 0;
+    remLo  := 0;
+    remHi  := 0;
 
     for bit := 63 downto 0 do begin
         { rem := rem shl 1 }
@@ -567,7 +561,6 @@ begin
 end;
 
 { ---------- Float-to-integer intrinsics ---------- }
-
 function Trunc(d: Double): int64; [public, alias: 'FPC_TRUNC'];
 var
     oldcw, newcw: word;
@@ -599,8 +592,8 @@ begin
 end;
 
 { ---------- Memory allocation compilerprocs ---------- }
-
 function kernel_kalloc(size: uint32): Pointer; external name 'kernel_kalloc';
+
 procedure kernel_kfree(p: Pointer); external name 'kernel_kfree';
 
 function fpc_getmem(size: PtrUInt): Pointer;
@@ -616,7 +609,6 @@ begin
 end;
 
 { ---------- Exception handling compilerprocs ---------- }
-
 procedure fpc_reraise; [public, alias: 'FPC_RERAISE']; compilerproc;
 begin
     { In a bare-metal core.version re-raise is a fatal condition }
@@ -641,30 +633,17 @@ begin
 end;
 
 procedure init();
-var
-    i    : longint;
-    proc : CodePointer;
 begin
     ASURO_KERNEL_START := uint32(@AK_START);
     ASURO_KERNEL_END := uint32(@AK_END);
-    ASURO_KERNEL_SIZE:= ASURO_KERNEL_END - ASURO_KERNEL_START;
+    ASURO_KERNEL_SIZE := ASURO_KERNEL_END - ASURO_KERNEL_START;
     ExceptAddrStack := nil;
     ErrorAddr := nil;
     ErrorCode := 0;
     ExitCode := 0;
     ExitProc := nil;
 
-    { Walk the INITFINAL table generated by compile_initcalls.sh and call
-      each unit's initialization section.  FPC with -n does not insert this
-      call automatically, so we do it explicitly here — after basic system
-      globals are set up but before kmain proceeds.
-      Note: we inline the walk rather than calling fpc_initializeunits
-      because compilerproc procedures cannot be called from Pascal code. }
-    for i := 1 to InitFinalTable.TableCount do begin
-        proc := InitFinalTable.Procs[i].InitProc;
-        if proc <> nil then
-            TProcedure(proc)();
-    end;
+    initializeUnits;
 end;
 
 end.

src/arch/x86_64/arch.x86_64.debug.pas

@@ -11,8 +11,10 @@
 // limitations under the License.
 
 unit arch.x86_64.debug;
+
 interface
 procedure init;
+
 implementation
 uses debug.early;
 { The stub initializes COM1. Bounded polling also allows boot without a UART. }