arch/x86: provide common Intel ACPI hardware definitions

In the ACPI specification the PM1 register locations are well
defined, but the sleep type values are hardware specific. That
said, the Intel chipsets have been consistent with the values
they use. Therefore, provide those hardware definitions as well
a helper function for translating the hardware values to the
more high level ACPI sleep values.

BUG=chrome-os-partner:54977

Change-Id: Iaeda082e362de5d440256d05e6885b3388ffbe43
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15666
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
diff --git a/src/acpi/Kconfig b/src/acpi/Kconfig
index e025f99..447927b 100644
--- a/src/acpi/Kconfig
+++ b/src/acpi/Kconfig
@@ -4,3 +4,9 @@
 	default n
 	help
 	  Use acpi sata port generator.
+
+config ACPI_INTEL_HARDWARE_SLEEP_VALUES
+	def_bool n
+	help
+	  Provide common definitions for Intel hardware PM1_CNT regiser sleep
+	  values.
diff --git a/src/arch/x86/include/arch/acpi.h b/src/arch/x86/include/arch/acpi.h
index 03cd709..dfbffb3 100644
--- a/src/arch/x86/include/arch/acpi.h
+++ b/src/arch/x86/include/arch/acpi.h
@@ -31,7 +31,22 @@
 #define HIGH_MEMORY_SAVE	0
 #endif
 
-#ifndef __ASSEMBLER__
+#if IS_ENABLED(CONFIG_ACPI_INTEL_HARDWARE_SLEEP_VALUES)
+/*
+ * The type and enable fields are common in ACPI, but the
+ * values themselves are hardware implementation idefiend.
+ */
+#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
+#endif
+
+#if !defined(__ASSEMBLER__) && !defined(__ACPI__) && !defined(__ROMCC__)
 #include <stdint.h>
 #include <rules.h>
 #include <commonlib/helpers.h>
@@ -624,6 +639,21 @@
 	ACPI_S5,
 };
 
+#if IS_ENABLED(CONFIG_ACPI_INTEL_HARDWARE_SLEEP_VALUES)
+/* Given the provided PM1 control register return the ACPI sleep type. */
+static inline int acpi_sleep_from_pm1(uint32_t 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 -1;
+}
+#endif
+
 /* Returns ACPI_Sx values. */
 int acpi_get_sleep_type(void);
 
@@ -660,6 +690,6 @@
 	return ALIGN(current, 16);
 }
 
-#endif  /* __ASSEMBLER__ */
+#endif  // !defined(__ASSEMBLER__) && !defined(__ACPI__) && !defined(__ROMC__)
 
 #endif  /* __ASM_ACPI_H */