From ff40052c103ed67677b9c4a17cdcee62ca8f6aed Mon Sep 17 00:00:00 2001 From: Fu Wei 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 --- 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