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[2/3] ACPI: add the hardware reduced mode check function in src/lib/src/fwts_acpi_tables.c.

Message ID 547D4B37.1090906@linaro.org
State Rejected
Headers show

Commit Message

Fu Wei Dec. 2, 2014, 5:16 a.m. UTC 
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.

Signed-off-by: Fu Wei <fu.wei@linaro.org>
Acked-by: Hanjun Guo <hanjun.guo@linaro.org>
Reviewed-by: Al Stone <al.stone@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(+)

-- 1.8.3.1
diff mbox

Patch

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