Re: [PATCH] QuarkPlatformPkg/PlatformFlashAccessLib: Skip the update if content is same.

["Kinney, Michael D" <michael.d.kinney@intel.com>]

Jiewen,

I have applied this patch on top of your FMP v2 series and verified that it 
skips erase/write of FLASH sectors that match in Galileo Gen 2 platform.

Since this patch is against the new lib that is part of Quark specific capsule
update, it should be integrated into an FMP v3 patch series after all FMP v2
feedback is received.

Thanks,

Mike

> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of Jiewen Yao
> Sent: Sunday, October 9, 2016 5:32 AM
> To: edk2-devel@lists.01.org
> Cc: Tian, Feng <feng.tian@intel.com>; Gao, Liming <liming.gao@intel.com>; Zeng, Star
> <star.zeng@intel.com>; Kinney, Michael D <michael.d.kinney@intel.com>; Zhang, Chao B
> <chao.b.zhang@intel.com>
> Subject: [edk2] [PATCH] QuarkPlatformPkg/PlatformFlashAccessLib: Skip the update if
> content is same.
> 
> This is enhancement for PlatformFlashAccessLib to skip flash write
> if the content is same in new image.
> 
> Cc: Michael D Kinney <michael.d.kinney@intel.com>
> Cc: Kelly Steele <kelly.steele@intel.com>
> Cc: Feng Tian <feng.tian@intel.com>
> Cc: Star Zeng <star.zeng@intel.com>
> Cc: Liming Gao <liming.gao@intel.com>
> Cc: Chao Zhang <chao.b.zhang@intel.com>
> Contributed-under: TianoCore Contribution Agreement 1.0
> Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
> ---
> 
> QuarkPlatformPkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccessLi
> bDxe.c | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git
> a/QuarkPlatformPkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccess
> LibDxe.c
> b/QuarkPlatformPkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccess
> LibDxe.c
> index 3ad30b1..aeafb1b 100644
> ---
> a/QuarkPlatformPkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccess
> LibDxe.c
> +++
> b/QuarkPlatformPkg/Feature/Capsule/Library/PlatformFlashAccessLib/PlatformFlashAccess
> LibDxe.c
> @@ -153,6 +153,15 @@ PerformFlashWrite(
>    //
>    SectorNum = Length / SPI_ERASE_SECTOR_SIZE;
>    for (Index = 0; Index < SectorNum; Index++){
> +    if (CompareMem(
> +          (UINT8 *)(UINTN)(FlashAddress + mInternalFdAddress) + Index *
> SPI_ERASE_SECTOR_SIZE,
> +          (UINT8 *)Buffer + Index * SPI_ERASE_SECTOR_SIZE,
> +          SPI_ERASE_SECTOR_SIZE) == 0) {
> +      DEBUG((EFI_D_INFO, "Sector - 0x%x - skip\n", Index));
> +      continue;
> +    }
> +    DEBUG((EFI_D_INFO, "Sector - 0x%x - update...\n", Index));
> +
>      Status = FlashFdErase (
>                 (UINTN)FlashAddress + Index * SPI_ERASE_SECTOR_SIZE
>                 );
> --
> 2.7.4.windows.1
> 
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