#include "acpi.h"
#include <stdint.h>
#include <stdbool.h>

// Function prototypes (implementations below)
acpi_fadt_t *acpi_find_fadt();
int acpi_validate_rsdt(acpi_fadt_t *fadt);

// ... (Add other ACPI functions for table parsing, resource access, etc.)

// Function to locate the FADT table
acpi_fadt_t *acpi_find_fadt() {
  // Read the RSDP (Root System Description Pointer) signature and checksum
  // at the ACPI base address.
  acpi_fadt_t *rsdp = (acpi_fadt_t *)ACPI_BASE;
  if (rsdp->signature != *(uint32_t *)"RSDT" && rsdp->signature != *(uint32_t *)"XSDT") {
    return NULL; // Not a valid ACPI signature
  }
  if (rsdp->checksum != 0) {
    return NULL; // Invalid checksum
  }

  // Check ACPI revision and use appropriate table address (RSDT or XSDT)
  return (acpi_fadt_t *)(rsdp->revision >= 2 ? rsdp->xsdt_addr : rsdp->rsdp_addr);
}

// Function to validate the RSDT (or XSDT) table
int acpi_validate_rsdt(acpi_fadt_t *fadt) {
  // Check table length and perform basic integrity checks
  // ...

  return 0; // Assuming success, replace with actual validation logic
}
