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@@ -0,0 +1,27 @@
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+/* SPDX-License-Identifier: GPL-2.0 */
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+/*
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+ * SMM definitions (U-Boot does not support SMM itself)
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+ *
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+ * Copyright (C) 2008-2009 coresystems GmbH
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+ * Copyright 2019 Google LLC
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+ *
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+ * Modified from coreboot smm.h
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+ */
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+
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+#ifndef _ASM_SMM_H
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+#define _ASM_SMM_H
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+
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+#define APM_CNT 0xb2
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+#define APM_CNT_CST_CONTROL 0x85
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+#define APM_CNT_PST_CONTROL 0x80
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+#define APM_CNT_ACPI_DISABLE 0x1e
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+#define APM_CNT_ACPI_ENABLE 0xe1
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+#define APM_CNT_MBI_UPDATE 0xeb
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+#define APM_CNT_GNVS_UPDATE 0xea
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+#define APM_CNT_FINALIZE 0xcb
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+#define APM_CNT_LEGACY 0xcc
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+#define APM_CNT_SMMSTORE 0xed
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+#define APM_CNT_ELOG_GSMI 0xef
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+#define APM_STS 0xb3
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+
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+#endif /* _ASM_SMM_H */
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