From: Novasys Ingenierie Date: Wed, 27 Nov 2013 08:03:01 +0000 (+0100) Subject: fpga: zynq: Correct fpga load when buf is not aligned X-Git-Tag: v2014.04-rc1~100^2~1 X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=c83a35f65250a8bdb519cb26680437e5c93d133d;p=oweals%2Fu-boot.git fpga: zynq: Correct fpga load when buf is not aligned When ARCH_DMA_MINALIGN is greater than header size of the bit file, and buf is not aligned, new_buf address became greater then buf_start address and the load_word loop corrupts bit file data. A work around is to decrease new_buf of ARCH_DMA_MINALIGN, it might corrupt data before buf but permits to load correctly. Signed-off-by: Stany MARCEL Signed-off-by: Michal Simek --- diff --git a/drivers/fpga/zynqpl.c b/drivers/fpga/zynqpl.c index 1effbadda9..15900c9ef2 100644 --- a/drivers/fpga/zynqpl.c +++ b/drivers/fpga/zynqpl.c @@ -187,6 +187,16 @@ int zynq_load(Xilinx_desc *desc, const void *buf, size_t bsize) if ((u32)buf != ALIGN((u32)buf, ARCH_DMA_MINALIGN)) { u32 *new_buf = (u32 *)ALIGN((u32)buf, ARCH_DMA_MINALIGN); + /* + * This might be dangerous but permits to flash if + * ARCH_DMA_MINALIGN is greater than header size + */ + if (new_buf > buf_start) { + debug("%s: Aligned buffer is after buffer start\n", + __func__); + new_buf -= ARCH_DMA_MINALIGN; + } + printf("%s: Align buffer at %x to %x(swap %d)\n", __func__, (u32)buf_start, (u32)new_buf, swap);