On 18.7.2018 09:41, Luis Araneda wrote:
> Implement FPGA bitstream loading from SPL. The bitstream
> is loaded from a FIT image into dynamically allocated memory
> before programming the FPGA.
>
> Signed-off-by: Luis Araneda <luaran...@gmail.com>
> ---
> arch/arm/mach-zynq/spl.c | 39 +++++++++++++++++++++++++++++++++++++++
> 1 file changed, 39 insertions(+)
>
> diff --git a/arch/arm/mach-zynq/spl.c b/arch/arm/mach-zynq/spl.c
> index 9b7c0be951..42907afa94 100644
> --- a/arch/arm/mach-zynq/spl.c
> +++ b/arch/arm/mach-zynq/spl.c
> @@ -4,6 +4,8 @@
> */
> #include <common.h>
> #include <debug_uart.h>
> +#include <fpga.h>
> +#include <memalign.h>
> #include <spl.h>
>
> #include <asm/io.h>
> @@ -93,3 +95,40 @@ int board_fit_config_name_match(const char *name)
> return 0;
> }
> #endif
> +
> +#ifdef CONFIG_SPL_FPGA_SUPPORT
> +int spl_load_fpga_image(struct spl_load_info *info, size_t length,
> + int nr_sectors, int sector_offset)
> +{
> + char *data_buf;
> + int ret;
> +
> + data_buf = malloc_cache_aligned(nr_sectors);
> + if (!data_buf) {
> + debug("%s: Cannot reserve memory\n", __func__);
> + return -ENOMEM;
> + }
> +
> + if (info->read(info, sector_offset, nr_sectors,
> + data_buf) != nr_sectors) {
> + debug("%s: Cannot read the FPGA image\n", __func__);
> + free(data_buf);
> + return -EIO;
> + }
> +
> + memmove(data_buf, data_buf + (nr_sectors - length), length);
> +
> + debug("%s: FPGA image loaded to 0x%p (%zu bytes)\n",
> + __func__, data_buf, length);
> +
> + ret = fpga_load(0, data_buf, length, BIT_FULL);
> + if (ret) {
> + debug("%s: Cannot load the image to the FPGA\n", __func__);
> + free(data_buf);
> + return ret;
> + }
> +
> + free(data_buf);
> + return 0;
> +}
> +#endif
>
I was playing with this a little bit. There is no reason to allocate
any space in malloc area because its/fit should already contain load
address which you should use instead.
Thanks,
Michal
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