Commit 85f94020 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

ACPI: OSL: Make ACPICA use logical addresses of GPE blocks 



Define ACPI_GPE_USE_LOGICAL_ADDRESSES in aclinux.h and modify
acpi_os_initialize() to store the logical addresses of the FADT GPE
blocks 0 and 1 in acpi_gbl_xgpe0_block_logical_address and
acpi_gbl_xgpe1_block_logical_address, respectively, so as to allow
ACPICA to use them for accessing GPE registers in system memory,
instead of using their physical addresses and looking up the
corresponding logical addresses on every access attempt, which is
inefficient.

Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 6915564d

drivers/acpi/osl.c

+10 −2
Original line number Diff line number Diff line
@@ -1744,8 +1744,12 @@ acpi_status __init acpi_os_initialize(void) 
{

	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);

	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);

	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);

	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);



	acpi_gbl_xgpe0_block_logical_address =

		(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);

	acpi_gbl_xgpe1_block_logical_address =

		(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);



	if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {

		/*

		 * Use acpi_os_map_generic_address to pre-map the reset
@@ -1783,8 +1787,12 @@ acpi_status acpi_os_terminate(void) 


	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);

	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);

	acpi_gbl_xgpe0_block_logical_address = 0UL;

	acpi_gbl_xgpe1_block_logical_address = 0UL;



	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);

	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);



	if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)

		acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);

include/acpi/platform/aclinux.h

+4 −0
Original line number Diff line number Diff line
@@ -118,6 +118,10 @@ 


#define USE_NATIVE_ALLOCATE_ZEROED



/* Use logical addresses for accessing GPE registers in system memory */



#define ACPI_GPE_USE_LOGICAL_ADDRESSES



/*

 * Overrides for in-kernel ACPICA

 */

CRA Git | Maintained and supported by SUSTech CRA and CCSE