#ifndef __VIDEO_SH_MOBILE_MERAM_H__ #define __VIDEO_SH_MOBILE_MERAM_H__ /* For sh_mobile_meram_info.addr_mode */ enum { SH_MOBILE_MERAM_MODE0 = 0, SH_MOBILE_MERAM_MODE1 }; enum { SH_MOBILE_MERAM_PF_NV = 0, SH_MOBILE_MERAM_PF_RGB, SH_MOBILE_MERAM_PF_NV24 }; struct sh_mobile_meram_priv; /* * struct sh_mobile_meram_info - MERAM platform data * @reserved_icbs: Bitmask of reserved ICBs (for instance used through UIO) */ struct sh_mobile_meram_info { int addr_mode; u32 reserved_icbs; struct sh_mobile_meram_priv *priv; struct platform_device *pdev; }; /* icb config */ struct sh_mobile_meram_icb_cfg { unsigned int meram_size; /* MERAM Buffer Size to use */ }; struct sh_mobile_meram_cfg { struct sh_mobile_meram_icb_cfg icb[2]; }; #if defined(CONFIG_FB_SH_MOBILE_MERAM) || \ defined(CONFIG_FB_SH_MOBILE_MERAM_MODULE) unsigned long sh_mobile_meram_alloc(struct sh_mobile_meram_info *meram_dev, size_t size); void sh_mobile_meram_free(struct sh_mobile_meram_info *meram_dev, unsigned long mem, size_t size); void *sh_mobile_meram_cache_alloc(struct sh_mobile_meram_info *dev, const struct sh_mobile_meram_cfg *cfg, unsigned int xres, unsigned int yres, unsigned int pixelformat, unsigned int *pitch); void sh_mobile_meram_cache_free(struct sh_mobile_meram_info *dev, void *data); void sh_mobile_meram_cache_update(struct sh_mobile_meram_info *dev, void *data, unsigned long base_addr_y, unsigned long base_addr_c, unsigned long *icb_addr_y, unsigned long *icb_addr_c); #else static inline unsigned long sh_mobile_meram_alloc(struct sh_mobile_meram_info *meram_dev, size_t size) { return 0; } static inline void sh_mobile_meram_free(struct sh_mobile_meram_info *meram_dev, unsigned long mem, size_t size) { } static inline void * sh_mobile_meram_cache_alloc(struct sh_mobile_meram_info *dev, const struct sh_mobile_meram_cfg *cfg, unsigned int xres, unsigned int yres, unsigned int pixelformat, unsigned int *pitch) { return ERR_PTR(-ENODEV); } static inline void sh_mobile_meram_cache_free(struct sh_mobile_meram_info *dev, void *data) { } static inline void sh_mobile_meram_cache_update(struct sh_mobile_meram_info *dev, void *data, unsigned long base_addr_y, unsigned long base_addr_c, unsigned long *icb_addr_y, unsigned long *icb_addr_c) { } #endif #endif /* __VIDEO_SH_MOBILE_MERAM_H__ */ ption>
path: root/include/uapi/asm-generic/signal.h
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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 /include/uapi/asm-generic/signal.h
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 'include/uapi/asm-generic/signal.h')