ptos/amd64+hal: Add interrupt handling + P1 KPCR init

Signed-off-by: Chloe M. <chloe@mensia.org>

service/ptos/arch/amd64/cpu/init.c

@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Kernel processor control region
+ * Author:      Chloe M.
+ */
+
+#include <hal/kpcr.h>
+#include <machine/idt.h>
+#include <machine/trap.h>
+
+/*
+ * Initialize interrupts for the current processor
+ */
+static VOID
+InitInterrupts(VOID)
+{
+    MdIdtSetGate(0x00, (UPTR)TrapDivError, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x01, (UPTR)TrapDebugException, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x02, (UPTR)TrapNmi, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x03, (UPTR)TrapBreakPoint, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x04, (UPTR)TrapOverflow, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x05, (UPTR)TrapBoundRange, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x06, (UPTR)TrapInvalidOpcode, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x07, (UPTR)TrapNoCoprocessor, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x08, (UPTR)TrapDoubleFault, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x09, (UPTR)TrapReserved, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x0A, (UPTR)TrapInvalidTss, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x0B, (UPTR)TrapSegNotPresent, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x0C, (UPTR)TrapStackSegmentFault, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x0D, (UPTR)TrapGeneralProtection, IDT_TRAP_GATE, 0);
+    MdIdtSetGate(0x0E, (UPTR)TrapPageFault, IDT_TRAP_GATE, 0);
+    MdIdtLoad();
+}
+
+VOID
+HalKpcrP1Init(KPCR *Kpcr)
+{
+    InitInterrupts();
+}

service/ptos/arch/amd64/cpu/trap.c

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: Trap dispatch
+ * Author:      Chloe M.
+ */
+
+#include <machine/trap.h>
+#include <ke/bugcheck.h>
+#include <ptdef.h>
+
+#define TRAP_STR(TYPE)              \
+    ((TYPE) >= NELEM(TrapTab))      \
+        ? "bad trap type"           \
+        : TrapTab[(TYPE)]
+
+static const CHAR *TrapTab[] = {
+    [TRAP_DIVERR] = "divide error",
+    [TRAP_DEBUG_EXCEPTION] = "debug exception",
+    [TRAP_NMI] = "non-maskable interrupt",
+    [TRAP_BREAKPOINT] = "breakpoint",
+    [TRAP_OVERFLOW] = "overflow",
+    [TRAP_BOUND_RANGE] = "bound range exceeded",
+    [TRAP_INVALID_OPCODE] = "invalid opcode",
+    [TRAP_NO_COPROCESSOR] = "no math coprocessor",
+    [TRAP_DOUBLE_FAULT] = "double fault",
+    [TRAP_RESERVED] = "reserved exception",
+    [TRAP_INVALID_TSS] = "invalid tss",
+    [TRAP_SEG_NOT_PRESENT] = "segment not present",
+    [TRAP_STACK_SEG_FAULT] = "stack segment fault",
+    [TRAP_GENERAL_PROTECTION] = "general protection fault",
+    [TRAP_PAGE_FAULT] = "page fault"
+};
+
+VOID
+MdTrapDispatch(TRAP_FRAME *TrapFrame)
+{
+    /* Sanity check */
+    if (TrapFrame == NULL) {
+        KeBugCheck(
+            BUGCHECK_UNBOUND_RESRC,
+            "unbound trapframe during dispatch\n"
+        );
+    }
+
+    KeBugCheck(
+        BUGCHECK_EXCEPTION,
+        "got fatal %s\n", TRAP_STR(TrapFrame->Vector)
+    );
+}

service/ptos/arch/amd64/cpu/vector.S

@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2026, Chloe M.
+ * Provided under the BSD-3 clause.
+ *
+ * Description: AMD64 interrupt vectors
+ * Author:      Chloe M.
+ */
+
+#include <machine/frameasm.h>
+
+    .text
+    .globl TrapDivError
+TrapDivError:
+    INTR_ENTRY($0x00)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapDebugException
+TrapDebugException:
+    INTR_ENTRY($0x01)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapNmi
+TrapNmi:
+    INTR_ENTRY($0x02)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapBreakPoint
+TrapBreakPoint:
+    INTR_ENTRY($0x03)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapOverflow
+TrapOverflow:
+    INTR_ENTRY($0x04)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapBoundRange
+TrapBoundRange:
+    INTR_ENTRY($0x05)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapInvalidOpcode
+TrapInvalidOpcode:
+    INTR_ENTRY($0x06)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapNoCoprocessor
+TrapNoCoprocessor:
+    INTR_ENTRY($0x07)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapDoubleFault
+TrapDoubleFault:
+    INTR_ENTRY_EC($0x08)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapReserved
+TrapReserved:
+    INTR_ENTRY($0x09)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapInvalidTss
+TrapInvalidTss:
+    INTR_ENTRY_EC($0x0A)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapSegNotPresent
+TrapSegNotPresent:
+    INTR_ENTRY_EC($0x0B)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapStackSegmentFault
+TrapStackSegmentFault:
+    INTR_ENTRY_EC($0x0C)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapGeneralProtection
+TrapGeneralProtection:
+    INTR_ENTRY_EC($0x0D)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b
+
+    .globl TrapPageFault
+TrapPageFault:
+    INTR_ENTRY_EC($0x0E)
+    mov %rsp, %rdi
+    call MdTrapDispatch
+1:  cli
+    hlt
+    jmp 1b