vma: Implement VMA.

+ acpi: Start implementation of table lookup
+ cpu: Remove useless argument to "cpu_invalidate_page"
+ cpu (x86_64): Removed "read_cr3"
+ arch/x86_64: Replace debug with trace for GDT & IDT initialization.

kernel/src/acpi/acpi.c

@@ -0,0 +1,43 @@
+/*
+ *  The Soaplin Kernel
+ *  Copyright (C) 2025 The SILD Project
+ *
+ *  acpi.c - ACPI table lookup
+ */
+
+#include <stdbool.h>
+
+#include <acpi/acpi.h>
+#include <arch/cpu.h>
+#include <boot/limine.h>
+#include <lib/log.h>
+#include <mm/memop.h>
+
+static bool     __acpi_use_xsdt;
+static uint64_t __acpi_rsdt_addr;
+
+void acpi_init() {
+    acpi_rsdp_t *rsdp = (acpi_rsdp_t*)limine_get_rsdp();
+    if (memcmp(rsdp->sign, "RSD PTR ", 8))
+    {
+        fatal("acpi: ACPI RSDP is corrupt\n");
+        hcf();
+    }
+
+    if (rsdp->rev >= 2)
+    {
+        trace("acpi: ACPI v2.0 or later detected: Using XSDT.\n");
+
+        acpi_xsdp_t *xsdp = (acpi_xsdp_t *)rsdp;
+        __acpi_use_xsdt = 1;
+        __acpi_rsdt_addr = xsdp->xsdt_addr;
+
+        goto initialized;
+    }
+
+    __acpi_use_xsdt = 0;
+    __acpi_rsdt_addr = rsdp->rsdt_addr; // Do not use a pointer, to shut up the compiler.
+
+initialized:
+    trace("acpi: Initialized!\n");
+}