/* * drivers/video/edid.h - EDID/DDC Header * * Based on: * 1. XFree86 4.3.0, edid.h * Copyright 1998 by Egbert Eich * * 2. John Fremlin and * Ani Joshi * * DDC is a Trademark of VESA (Video Electronics Standard Association). * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #ifndef __EDID_H__ #define __EDID_H__ #define EDID_LENGTH 0x80 #define EDID_HEADER 0x00 #define EDID_HEADER_END 0x07 #define ID_MANUFACTURER_NAME 0x08 #define ID_MANUFACTURER_NAME_END 0x09 #define ID_MODEL 0x0a #define ID_SERIAL_NUMBER 0x0c #define MANUFACTURE_WEEK 0x10 #define MANUFACTURE_YEAR 0x11 #define EDID_STRUCT_VERSION 0x12 #define EDID_STRUCT_REVISION 0x13 #define EDID_STRUCT_DISPLAY 0x14 #define DPMS_FLAGS 0x18 #define ESTABLISHED_TIMING_1 0x23 #define ESTABLISHED_TIMING_2 0x24 #define MANUFACTURERS_TIMINGS 0x25 /* standard timings supported */ #define STD_TIMING 8 #define STD_TIMING_DESCRIPTION_SIZE 2 #define STD_TIMING_DESCRIPTIONS_START 0x26 #define DETAILED_TIMING_DESCRIPTIONS_START 0x36 #define DETAILED_TIMING_DESCRIPTION_SIZE 18 #define NO_DETAILED_TIMING_DESCRIPTIONS 4 #define DETAILED_TIMING_DESCRIPTION_1 0x36 #define DETAILED_TIMING_DESCRIPTION_2 0x48 #define DETAILED_TIMING_DESCRIPTION_3 0x5a #define DETAILED_TIMING_DESCRIPTION_4 0x6c #define DESCRIPTOR_DATA 5 #define UPPER_NIBBLE( x ) \ (((128|64|32|16) & (x)) >> 4) #define LOWER_NIBBLE( x ) \ ((1|2|4|8) & (x)) #define COMBINE_HI_8LO( hi, lo ) \ ( (((unsigned)hi) << 8) | (unsigned)lo ) #define COMBINE_HI_4LO( hi, lo ) \ ( (((unsigned)hi) << 4) | (unsigned)lo ) #define PIXEL_CLOCK_LO (unsigned)block[ 0 ] #define PIXEL_CLOCK_HI (unsigned)block[ 1 ] #define PIXEL_CLOCK (COMBINE_HI_8LO( PIXEL_CLOCK_HI,PIXEL_CLOCK_LO )*10000) #define H_ACTIVE_LO (unsigned)block[ 2 ] #define H_BLANKING_LO (unsigned)block[ 3 ] #define H_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 4 ] ) #define H_ACTIVE COMBINE_HI_8LO( H_ACTIVE_HI, H_ACTIVE_LO ) #define H_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 4 ] ) #define H_BLANKING COMBINE_HI_8LO( H_BLANKING_HI, H_BLANKING_LO ) #define V_ACTIVE_LO (unsigned)block[ 5 ] #define V_BLANKING_LO (unsigned)block[ 6 ] #define V_ACTIVE_HI UPPER_NIBBLE( (unsigned)block[ 7 ] ) #define V_ACTIVE COMBINE_HI_8LO( V_ACTIVE_HI, V_ACTIVE_LO ) #define V_BLANKING_HI LOWER_NIBBLE( (unsigned)block[ 7 ] ) #define V_BLANKING COMBINE_HI_8LO( V_BLANKING_HI, V_BLANKING_LO ) #define H_SYNC_OFFSET_LO (unsigned)block[ 8 ] #define H_SYNC_WIDTH_LO (unsigned)block[ 9 ] #define V_SYNC_OFFSET_LO UPPER_NIBBLE( (unsigned)block[ 10 ] ) #define V_SYNC_WIDTH_LO LOWER_NIBBLE( (unsigned)block[ 10 ] ) #define V_SYNC_WIDTH_HI ((unsigned)block[ 11 ] & (1|2)) #define V_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (4|8)) >> 2) #define H_SYNC_WIDTH_HI (((unsigned)block[ 11 ] & (16|32)) >> 4) #define H_SYNC_OFFSET_HI (((unsigned)block[ 11 ] & (64|128)) >> 6) #define V_SYNC_WIDTH COMBINE_HI_4LO( V_SYNC_WIDTH_HI, V_SYNC_WIDTH_LO ) #define V_SYNC_OFFSET COMBINE_HI_4LO( V_SYNC_OFFSET_HI, V_SYNC_OFFSET_LO ) #define H_SYNC_WIDTH COMBINE_HI_8LO( H_SYNC_WIDTH_HI, H_SYNC_WIDTH_LO ) #define H_SYNC_OFFSET COMBINE_HI_8LO( H_SYNC_OFFSET_HI, H_SYNC_OFFSET_LO ) #define H_SIZE_LO (unsigned)block[ 12 ] #define V_SIZE_LO (unsigned)block[ 13 ] #define H_SIZE_HI UPPER_NIBBLE( (unsigned)block[ 14 ] ) #define V_SIZE_HI LOWER_NIBBLE( (unsigned)block[ 14 ] ) #define H_SIZE COMBINE_HI_8LO( H_SIZE_HI, H_SIZE_LO ) #define V_SIZE COMBINE_HI_8LO( V_SIZE_HI, V_SIZE_LO ) #define H_BORDER (unsigned)block[ 15 ] #define V_BORDER (unsigned)block[ 16 ] #define FLAGS (unsigned)block[ 17 ] #define INTERLACED (FLAGS&128) #define SYNC_TYPE (FLAGS&3<<3) /* bits 4,3 */ #define SYNC_SEPARATE (3<<3) #define HSYNC_POSITIVE (FLAGS & 4) #define VSYNC_POSITIVE (FLAGS & 2) #define V_MIN_RATE block[ 5 ] #define V_MAX_RATE block[ 6 ] #define H_MIN_RATE block[ 7 ] #define H_MAX_RATE block[ 8 ] #define MAX_PIXEL_CLOCK (((int)block[ 9 ]) * 10) #define GTF_SUPPORT block[10] #define DPMS_ACTIVE_OFF (1 << 5) #define DPMS_SUSPEND (1 << 6) #define DPMS_STANDBY (1 << 7) #endif /* __EDID_H__ */ nly
authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-01 17:45:02 +0000
committerIngo Molnar <mingo@kernel.org>2017-02-01 21:17:49 +0100
commitc8f325a59cfc718d13a50fbc746ed9b415c25e92 (patch)
treed53fbdac9d0781e39a13b2ac6b2bd258cf3b4140 /net/sunrpc/auth_null.c
parentbf29bddf0417a4783da3b24e8c9e017ac649326f (diff)
efi/fdt: Avoid FDT manipulation after ExitBootServices()
Some AArch64 UEFI implementations disable the MMU in ExitBootServices(), after which unaligned accesses to RAM are no longer supported. Commit: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") fixed an issue in the memory map handling of the stub FDT code, but inadvertently created an issue with such firmware, by moving some of the FDT manipulation to after the invocation of ExitBootServices(). Given that the stub's libfdt implementation uses the ordinary, accelerated string functions, which rely on hardware handling of unaligned accesses, manipulating the FDT with the MMU off may result in alignment faults. So fix the situation by moving the update_fdt_memmap() call into the callback function invoked by efi_exit_boot_services() right before it calls the ExitBootServices() UEFI service (which is arguably a better place for it anyway) Note that disabling the MMU in ExitBootServices() is not compliant with the UEFI spec, and carries great risk due to the fact that switching from cached to uncached memory accesses halfway through compiler generated code (i.e., involving a stack) can never be done in a way that is architecturally safe. Fixes: abfb7b686a3e ("efi/libstub/arm*: Pass latest memory map to the kernel") Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Tested-by: Riku Voipio <riku.voipio@linaro.org> Cc: <stable@vger.kernel.org> Cc: mark.rutland@arm.com Cc: linux-efi@vger.kernel.org Cc: matt@codeblueprint.co.uk Cc: leif.lindholm@linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1485971102-23330-2-git-send-email-ard.biesheuvel@linaro.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/sunrpc/auth_null.c')