Integrate uACPI

kernel/uACPI/include/uacpi/platform/arch_helpers.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#ifdef UACPI_OVERRIDE_ARCH_HELPERS
+#include "uacpi_arch_helpers.h"
+#else
+
+#include <uacpi/platform/atomic.h>
+
+#ifndef UACPI_ARCH_FLUSH_CPU_CACHE
+#define UACPI_ARCH_FLUSH_CPU_CACHE() do {} while (0)
+#endif
+
+typedef unsigned long uacpi_cpu_flags;
+
+typedef void *uacpi_thread_id;
+
+/*
+ * Replace as needed depending on your platform's way to represent thread ids.
+ * uACPI offers a few more helpers like uacpi_atomic_{load,store}{8,16,32,64,ptr}
+ * (or you could provide your own helpers)
+ */
+#ifndef UACPI_ATOMIC_LOAD_THREAD_ID
+#define UACPI_ATOMIC_LOAD_THREAD_ID(ptr) ((uacpi_thread_id)uacpi_atomic_load_ptr(ptr))
+#endif
+
+#ifndef UACPI_ATOMIC_STORE_THREAD_ID
+#define UACPI_ATOMIC_STORE_THREAD_ID(ptr, value) uacpi_atomic_store_ptr(ptr, value)
+#endif
+
+/*
+ * A sentinel value that the kernel promises to NEVER return from
+ * uacpi_kernel_get_current_thread_id or this will break
+ */
+#ifndef UACPI_THREAD_ID_NONE
+#define UACPI_THREAD_ID_NONE ((uacpi_thread_id)-1)
+#endif
+
+#endif