1 files changed, 130 insertions, 0 deletions
diff --git a/include/acpi_s3.h b/include/acpi_s3.h
new file mode 100644
index 0000000000..baa848dcd1
--- /dev/null
+++ b/include/acpi_s3.h
@@ -0,0 +1,130 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
+ */
+
+#ifndef __ASM_ACPI_S3_H__
+#define __ASM_ACPI_S3_H__
+
+#define WAKEUP_BASE	0x600
+
+/* PM1_STATUS register */
+#define WAK_STS		(1 << 15)
+#define PCIEXPWAK_STS	(1 << 14)
+#define RTC_STS		(1 << 10)
+#define SLPBTN_STS	(1 << 9)
+#define PWRBTN_STS	(1 << 8)
+#define GBL_STS		(1 << 5)
+#define BM_STS		(1 << 4)
+#define TMR_STS		(1 << 0)
+
+/* PM1_CNT register */
+#define SLP_EN		(1 << 13)
+#define SLP_TYP_SHIFT	10
+#define SLP_TYP		(7 << SLP_TYP_SHIFT)
+#define SLP_TYP_S0	0
+#define SLP_TYP_S1	1
+#define SLP_TYP_S3	5
+#define SLP_TYP_S4	6
+#define SLP_TYP_S5	7
+
+/* Memory size reserved for S3 resume */
+#define S3_RESERVE_SIZE	0x1000
+
+#ifndef __ASSEMBLY__
+
+extern char __wakeup[];
+extern int __wakeup_size;
+
+enum acpi_sleep_state {
+	ACPI_S0,
+	ACPI_S1,
+	ACPI_S2,
+	ACPI_S3,
+	ACPI_S4,
+	ACPI_S5,
+};
+
+/**
+ * acpi_ss_string() - get ACPI-defined sleep state string
+ *
+ * @pm1_cnt:	ACPI-defined sleep state
+ * @return:	a pointer to the sleep state string.
+ */
+static inline char *acpi_ss_string(enum acpi_sleep_state state)
+{
+	char *ss_string[] = { "S0", "S1", "S2", "S3", "S4", "S5"};
+
+	return ss_string[state];
+}
+
+/**
+ * acpi_sleep_from_pm1() - get ACPI-defined sleep state from PM1_CNT register
+ *
+ * @pm1_cnt:	PM1_CNT register value
+ * @return:	ACPI-defined sleep state if given valid PM1_CNT register value,
+ *		-EINVAL otherwise.
+ */
+static inline enum acpi_sleep_state acpi_sleep_from_pm1(u32 pm1_cnt)
+{
+	switch ((pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) {
+	case SLP_TYP_S0:
+		return ACPI_S0;
+	case SLP_TYP_S1:
+		return ACPI_S1;
+	case SLP_TYP_S3:
+		return ACPI_S3;
+	case SLP_TYP_S4:
+		return ACPI_S4;
+	case SLP_TYP_S5:
+		return ACPI_S5;
+	}
+
+	return -EINVAL;
+}
+
+/**
+ * chipset_prev_sleep_state() - Get chipset previous sleep state
+ *
+ * This returns chipset previous sleep state from ACPI registers.
+ * Platform codes must supply this routine in order to support ACPI S3.
+ *
+ * @return ACPI_S0/S1/S2/S3/S4/S5.
+ */
+enum acpi_sleep_state chipset_prev_sleep_state(void);
+
+/**
+ * chipset_clear_sleep_state() - Clear chipset sleep state
+ *
+ * This clears chipset sleep state in ACPI registers.
+ * Platform codes must supply this routine in order to support ACPI S3.
+ */
+void chipset_clear_sleep_state(void);
+
+struct acpi_fadt;
+/**
+ * acpi_resume() - Do ACPI S3 resume
+ *
+ * This calls U-Boot wake up assembly stub and jumps to OS's wake up vector.
+ *
+ * @fadt:	FADT table pointer in the ACPI table
+ * @return:	Never returns
+ */
+void acpi_resume(struct acpi_fadt *fadt);
+
+/**
+ * acpi_s3_reserve() - Reserve memory for ACPI S3 resume
+ *
+ * This copies memory where real mode interrupt handler stubs reside to the
+ * reserved place on the stack.
+ *
+ * This routine should be called by reserve_arch() before U-Boot is relocated
+ * when ACPI S3 resume is enabled.
+ *
+ * @return:	0 always
+ */
+int acpi_s3_reserve(void);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_ACPI_S3_H__ */