x86: Generate a valid ACPI table
Implement write_acpi_table() to create a minimal working ACPI table.
This includes writing FACS, XSDT, RSDP, FADT, MCFG, MADT, DSDT & SSDT
ACPI table entries.
Use a Kconfig option GENERATE_ACPI_TABLE to tell U-Boot whether we need
actually write the APCI table just like we did for PIRQ routing, MP table
and SFI tables. With ACPI table existence, linux kernel gets control of
power management, thermal management, configuration management and
monitoring in hardware.
Signed-off-by: Saket Sinha <saket.sinha89@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tidied up whitespace and aligned some tabs:
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 273f08f..5e42d7d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -349,6 +349,15 @@
multiprocessing as well as symmetric I/O interrupt handling with
the local APIC and I/O APIC.
+config GENERATE_ACPI_TABLE
+ bool "Generate an ACPI (Advanced Configuration and Power Interface) table"
+ default n
+ help
+ The Advanced Configuration and Power Interface (ACPI) specification
+ provides an open standard for device configuration and management
+ by the operating system. It defines platform-independent interfaces
+ for configuration and power management monitoring.
+
endmenu
config MAX_PIRQ_LINKS