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From ff40052c103ed67677b9c4a17cdcee62ca8f6aed Mon Sep 17 00:00:00 2001
From: Fu Wei <fu.wei@linaro.org>
Date: Tue, 25 Nov 2014 17:12:24 +0800
Subject: [PATCH 2/3] ACPI: add the hardware reduced mode check function in
src/lib/src/fwts_acpi_tables.c.
It is a prerequisite for ignoring a missing FACS table in hardware-reduced mode.
Upstream-status: Accepted [14.12.00]
Signed-off-by: Fu Wei <fu.wei@linaro.org>
---
src/lib/include/fwts_acpi.h | 1 +
src/lib/include/fwts_acpi_tables.h | 2 ++
src/lib/src/fwts_acpi_tables.c | 14 ++++++++++++++
3 files changed, 17 insertions(+)
diff --git a/src/lib/include/fwts_acpi.h b/src/lib/include/fwts_acpi.h
index 24ebc84..73a3461 100644
--- a/src/lib/include/fwts_acpi.h
+++ b/src/lib/include/fwts_acpi.h
@@ -46,6 +46,7 @@ extern const char *fwts_acpi_fadt_preferred_pm_profile[];
#define FWTS_ACPI_FADT_PREFERRED_PM_PROFILE(x) \
((x) > 8) ? "Reserved" : fwts_acpi_fadt_preferred_pm_profile[x]
+#define FWTS_ACPI_FADT_FLAGS_HW_REDUCED_ACPI (1<<20)
/* 5.2.3.1 Generic Address Structure */
typedef struct {
diff --git a/src/lib/include/fwts_acpi_tables.h b/src/lib/include/fwts_acpi_tables.h
index 6977e87..798dfc5 100644
--- a/src/lib/include/fwts_acpi_tables.h
+++ b/src/lib/include/fwts_acpi_tables.h
@@ -45,4 +45,6 @@ int fwts_acpi_find_table_by_addr(fwts_framework *fw, const uint64_t addr, fwts_a
int fwts_acpi_get_table(fwts_framework *fw, const int index, fwts_acpi_table_info **info);
uint8_t fwts_acpi_checksum(const uint8_t *data, const int length);
+fwts_bool fwts_acpi_is_reduced_hardware(const fwts_acpi_table_fadt *fadt);
+
#endif
diff --git a/src/lib/src/fwts_acpi_tables.c b/src/lib/src/fwts_acpi_tables.c
index 96a117e..7f73a10 100644
--- a/src/lib/src/fwts_acpi_tables.c
+++ b/src/lib/src/fwts_acpi_tables.c
@@ -275,6 +275,20 @@ int fwts_acpi_free_tables(void)
}
/*
+ * fwts_acpi_is_reduced_hardware()
+ * Check the ACPI tables for HW_REDUCED_ACPI bit in flag field.
+ */
+fwts_bool fwts_acpi_is_reduced_hardware(const fwts_acpi_table_fadt *fadt)
+{
+ if ((fadt->header.revision >= 5) &&
+ (fadt->header.length >= 116)&&
+ (fadt->flags && FWTS_ACPI_FADT_FLAGS_HW_REDUCED_ACPI)) {
+ return FWTS_TRUE;
+ }
+ return FWTS_FALSE;
+}
+
+/*
* fwts_acpi_handle_fadt_tables()
* depending on whether 32 or 64 bit address is usable, get the table
* address and load it. This handles the DSDT and FACS as pointed to
--
2.1.1
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