feat: expanded ACPI support, initial support for S3 sleep

2026-03-15 00:55:19 +01:00
parent 261b536041
commit 64c26f4288
39 changed files with 4403 additions and 59 deletions
@@ -0,0 +1,112 @@
+/*
+    * AcpiDevices.hpp
+    * ACPI device enumeration — walks namespace to discover and query devices
+    * Copyright (c) 2026 Daniel Hammer
+*/
+
+#pragma once
+#include <cstdint>
+#include <ACPI/AML/AmlResource.hpp>
+
+namespace Hal {
+    namespace AcpiDevices {
+
+        // ── Device Status Flags (_STA) ──────────────────────────────────
+        static constexpr uint32_t STA_PRESENT     = (1 << 0);
+        static constexpr uint32_t STA_ENABLED     = (1 << 1);
+        static constexpr uint32_t STA_VISIBLE     = (1 << 2);
+        static constexpr uint32_t STA_FUNCTIONAL  = (1 << 3);
+        static constexpr uint32_t STA_BATTERY     = (1 << 4); // battery present (for batteries)
+
+        // Default _STA when no _STA method exists: present + enabled + visible + functional
+        static constexpr uint32_t STA_DEFAULT     = 0x0F;
+
+        // ── Device Info ─────────────────────────────────────────────────
+        struct DeviceInfo {
+            char     Path[128];       // full namespace path
+            char     HardwareId[16];  // _HID value (e.g. "PNP0A03", "ACPI0001")
+            char     UniqueId[16];    // _UID value
+            uint64_t Address;         // _ADR value (for PCI: (device << 16) | function)
+            uint32_t Status;          // _STA flags
+            int32_t  NodeIndex;       // namespace node index
+            bool     IsPresent;       // STA_PRESENT && STA_FUNCTIONAL
+        };
+
+        static constexpr int MaxDevices = 64;
+
+        struct DeviceList {
+            DeviceInfo Devices[MaxDevices];
+            int        Count;
+
+            DeviceList() : Count(0) {}
+
+            // Find a device by HID. Returns nullptr if not found.
+            const DeviceInfo* FindByHid(const char* hid) const;
+
+            // Find a device by path. Returns nullptr if not found.
+            const DeviceInfo* FindByPath(const char* path) const;
+        };
+
+        // ── Enumeration API ─────────────────────────────────────────────
+
+        // Enumerate all ACPI devices in the namespace.
+        // The interpreter must be initialized first (LoadTable called).
+        void EnumerateAll(DeviceList& result);
+
+        // Evaluate _STA for a device node. Returns STA_DEFAULT if no _STA exists.
+        uint32_t EvaluateSta(int32_t deviceNodeIndex);
+
+        // Evaluate _ADR for a device node. Returns 0 if no _ADR exists.
+        uint64_t EvaluateAdr(int32_t deviceNodeIndex);
+
+        // Evaluate _HID for a device node. Returns false if no _HID exists.
+        // Writes the HID string (or EISAID) into outHid.
+        bool EvaluateHid(int32_t deviceNodeIndex, char* outHid, int maxLen);
+
+        // Evaluate _UID for a device node.
+        bool EvaluateUid(int32_t deviceNodeIndex, char* outUid, int maxLen);
+
+        // Evaluate _CRS (Current Resource Settings) for a device node.
+        bool EvaluateCrs(int32_t deviceNodeIndex, AML::ResourceList& result);
+
+        // ── Well-known HIDs ─────────────────────────────────────────────
+        // PCI Host Bridge
+        static constexpr const char* HID_PCI_HOST   = "PNP0A03";
+        static constexpr const char* HID_PCIE_HOST  = "PNP0A08";
+        // System Timer (PIT)
+        static constexpr const char* HID_PIT        = "PNP0100";
+        // RTC / CMOS
+        static constexpr const char* HID_RTC        = "PNP0B00";
+        // Keyboard controller (i8042)
+        static constexpr const char* HID_KBD        = "PNP0303";
+        // PS/2 Mouse
+        static constexpr const char* HID_MOUSE      = "PNP0F13";
+        // Serial port (UART)
+        static constexpr const char* HID_SERIAL     = "PNP0501";
+        // ACPI Embedded Controller
+        static constexpr const char* HID_EC         = "PNP0C09";
+        // ACPI Power Button
+        static constexpr const char* HID_PWRBTN     = "PNP0C0C";
+        // ACPI Sleep Button
+        static constexpr const char* HID_SLPBTN     = "PNP0C0E";
+        // ACPI Lid device
+        static constexpr const char* HID_LID        = "PNP0C0D";
+        // ACPI Thermal Zone
+        static constexpr const char* HID_THERMAL    = "PNP0C0B";
+        // ACPI Battery
+        static constexpr const char* HID_BATTERY    = "PNP0C0A";
+        // ACPI AC Adapter
+        static constexpr const char* HID_AC_ADAPTER = "ACPI0003";
+
+        // ── Sleep State Support ─────────────────────────────────────────
+        // Extract sleep state values from namespace objects (\_S0_ through \_S5_).
+        struct SleepState {
+            uint16_t SLP_TYPa;
+            uint16_t SLP_TYPb;
+            bool     Valid;
+        };
+
+        // Get the sleep type values for a given sleep state (0-5).
+        SleepState GetSleepState(int state);
+    };
+};