On 05/31/2018 11:50 AM, See, Chin Liang wrote: > On Thu, 2018-05-31 at 11:24 +0200, Marek Vasut wrote: >> On 05/31/2018 10:08 AM, tien.fong.c...@intel.com wrote: >>> >>> From: Tien Fong Chee <tien.fong.c...@intel.com> >>> >>> This patchset contains dm driver for DMA330 controller. >>> >>> This series is working on top of u-boot-socfpga.git - >>> http://git.denx.de/u-boot.git . >>> >>> Tien Fong Chee (5): >>> drivers: dma: Enable DMA-330 driver support >>> drivers: dma: Add function to zeroes a range of destination such >>> as >>> memory >>> drivers: dma: Factor out dma_get_device from DMA class function >>> include: dma: Update the function description for dma_memcpy >>> arm: dts: socfpga: stratix10: update pdma >>> >>> arch/arm/dts/socfpga_stratix10.dtsi | 20 + >>> drivers/dma/Kconfig | 9 +- >>> drivers/dma/Makefile | 1 + >>> drivers/dma/dma-uclass.c | 23 +- >>> drivers/dma/dma330.c | 1514 >>> +++++++++++++++++++++++++++++++++++ >>> drivers/mtd/spi/spi_flash.c | 9 +- >>> include/dma.h | 19 +- >>> include/dma330.h | 136 ++++ >>> 8 files changed, 1719 insertions(+), 12 deletions(-) >>> create mode 100644 drivers/dma/dma330.c >>> create mode 100644 include/dma330.h >>> >> I presume this is to zero-out the ECC RAM ? Just enable caches and >> use >> memset, it is much faster than this DMA witchcraft, at least on the >> A10. > > Yes and no :) > > The patch enable DMA-330 support and also zero-out ECC RAM.
Right, that's what I said ? > While for the speed, DMA still faster as it has larger burst size. It takes ~0.9s to erase 2 GiB of RAM on the A10. How fast is the DMA? > We > can also parallel the zero out task with other tasks such as flash > controller init. The flash controller also needs some zeroing out ? -- Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de https://lists.denx.de/listinfo/u-boot
