#ifndef __DT_FSL_IMX_AUDMUX_H #define __DT_FSL_IMX_AUDMUX_H #define MX27_AUDMUX_HPCR1_SSI0 0 #define MX27_AUDMUX_HPCR2_SSI1 1 #define MX27_AUDMUX_HPCR3_SSI_PINS_4 2 #define MX27_AUDMUX_PPCR1_SSI_PINS_1 3 #define MX27_AUDMUX_PPCR2_SSI_PINS_2 4 #define MX27_AUDMUX_PPCR3_SSI_PINS_3 5 #define MX31_AUDMUX_PORT1_SSI0 0 #define MX31_AUDMUX_PORT2_SSI1 1 #define MX31_AUDMUX_PORT3_SSI_PINS_3 2 #define MX31_AUDMUX_PORT4_SSI_PINS_4 3 #define MX31_AUDMUX_PORT5_SSI_PINS_5 4 #define MX31_AUDMUX_PORT6_SSI_PINS_6 5 #define MX31_AUDMUX_PORT7_SSI_PINS_7 6 #define MX51_AUDMUX_PORT1_SSI0 0 #define MX51_AUDMUX_PORT2_SSI1 1 #define MX51_AUDMUX_PORT3 2 #define MX51_AUDMUX_PORT4 3 #define MX51_AUDMUX_PORT5 4 #define MX51_AUDMUX_PORT6 5 #define MX51_AUDMUX_PORT7 6 /* Register definitions for the i.MX21/27 Digital Audio Multiplexer */ #define IMX_AUDMUX_V1_PCR_INMMASK(x) ((x) & 0xff) #define IMX_AUDMUX_V1_PCR_INMEN (1 << 8) #define IMX_AUDMUX_V1_PCR_TXRXEN (1 << 10) #define IMX_AUDMUX_V1_PCR_SYN (1 << 12) #define IMX_AUDMUX_V1_PCR_RXDSEL(x) (((x) & 0x7) << 13) #define IMX_AUDMUX_V1_PCR_RFCSEL(x) (((x) & 0xf) << 20) #define IMX_AUDMUX_V1_PCR_RCLKDIR (1 << 24) #define IMX_AUDMUX_V1_PCR_RFSDIR (1 << 25) #define IMX_AUDMUX_V1_PCR_TFCSEL(x) (((x) & 0xf) << 26) #define IMX_AUDMUX_V1_PCR_TCLKDIR (1 << 30) #define IMX_AUDMUX_V1_PCR_TFSDIR (1 << 31) /* Register definitions for the i.MX25/31/35/51 Digital Audio Multiplexer */ #define IMX_AUDMUX_V2_PTCR_TFSDIR (1 << 31) #define IMX_AUDMUX_V2_PTCR_TFSEL(x) (((x) & 0xf) << 27) #define IMX_AUDMUX_V2_PTCR_TCLKDIR (1 << 26) #define IMX_AUDMUX_V2_PTCR_TCSEL(x) (((x) & 0xf) << 22) #define IMX_AUDMUX_V2_PTCR_RFSDIR (1 << 21) #define IMX_AUDMUX_V2_PTCR_RFSEL(x) (((x) & 0xf) << 17) #define IMX_AUDMUX_V2_PTCR_RCLKDIR (1 << 16) #define IMX_AUDMUX_V2_PTCR_RCSEL(x) (((x) & 0xf) << 12) #define IMX_AUDMUX_V2_PTCR_SYN (1 << 11) #define IMX_AUDMUX_V2_PDCR_RXDSEL(x) (((x) & 0x7) << 13) #define IMX_AUDMUX_V2_PDCR_TXRXEN (1 << 12) #define IMX_AUDMUX_V2_PDCR_MODE(x) (((x) & 0x3) << 8) #define IMX_AUDMUX_V2_PDCR_INMMASK(x) ((x) & 0xff) #endif /* __DT_FSL_IMX_AUDMUX_H */ ucv'>
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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/iucv
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>
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