On 03/03/2017 05:45 AM, Zhiqiang Hou wrote:
> From: Hou Zhiqiang <zhiqiang....@nxp.com>
>
> Signed-off-by: Hou Zhiqiang <zhiqiang....@nxp.com>
> ---
>  arch/arm/cpu/armv8/fsl-layerscape/ppa.c | 118 
> +++++++++++++++++++++++++++++++-
>  1 file changed, 117 insertions(+), 1 deletion(-)

<snip>

>
>  #ifdef CONFIG_SYS_LS_PPA_FW_IN_XIP
>       ppa_fit_addr = (void *)CONFIG_SYS_LS_PPA_FW_ADDR;
> +     debug("%s: PPA image load from XIP\n", __func__);
> +#else /* !CONFIG_SYS_LS_PPA_FW_IN_XIP */
> +     size_t fw_length, fdt_header_len = sizeof(struct fdt_header);
> +
> +     /* Copy PPA image from MMC/SD/NAND to allocated memory */
> +#ifdef CONFIG_SYS_LS_PPA_FW_IN_MMC
> +     struct mmc *mmc;
> +     int dev = CONFIG_SYS_MMC_ENV_DEV;
> +     struct fdt_header *fitp;
> +     u32 cnt;
> +     u32 blk = CONFIG_SYS_LS_PPA_FW_ADDR / 512;
> +
> +     debug("%s: PPA image load from eMMC/SD\n", __func__);
> +
> +     mmc_initialize(gd->bd);
> +     mmc = find_mmc_device(dev);
> +     if (!mmc) {
> +             printf("PPA: MMC cannot find device for PPA firmware\n");
> +             return -ENODEV;
> +     }
> +
> +     mmc_init(mmc);
> +
> +     fitp = malloc(roundup(fdt_header_len, 512));
> +     if (!fitp) {
> +             printf("PPA: malloc failed for FIT header(size 0x%zx)\n",
> +                    roundup(fdt_header_len, 512));
> +             return -ENOMEM;
> +     }
> +
> +     cnt = DIV_ROUND_UP(fdt_header_len, 512);
> +     debug("%s: MMC read PPA FIT header: dev # %u, block # %u, count %u\n",
> +           __func__, dev, blk, cnt);
> +     ret = mmc->block_dev.block_read(&mmc->block_dev, blk, cnt, fitp);
> +     if (ret != cnt) {
> +             free(fitp);
> +             printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
> +                    CONFIG_SYS_LS_PPA_FW_ADDR);
> +             return -EIO;
> +     }
> +
> +     /* flush cache after read */
> +     flush_cache((ulong)fitp, cnt * 512);
> +
> +     fw_length = fdt_totalsize(fitp);
> +     free(fitp);
> +
> +     fw_length = roundup(fw_length, 512);
> +     ppa_fit_addr = malloc(fw_length);
> +     if (!ppa_fit_addr) {
> +             printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
> +                    fw_length);
> +             return -ENOMEM;
> +     }
> +
> +     cnt = DIV_ROUND_UP(fw_length, 512);
> +     debug("%s: MMC read PPA FIT image: dev # %u, block # %u, count %u\n",
> +           __func__, dev, blk, cnt);
> +     ret = mmc->block_dev.block_read(&mmc->block_dev,
> +                                     blk, cnt, ppa_fit_addr);
> +     if (ret != cnt) {
> +             free(ppa_fit_addr);
> +             printf("MMC/SD read of PPA FIT header at offset 0x%x failed\n",
> +                    CONFIG_SYS_LS_PPA_FW_ADDR);
> +             return -EIO;
> +     }
> +
> +     flush_cache((ulong)ppa_fit_addr, cnt * 512);
> +
> +#elif CONFIG_SYS_LS_PPA_FW_IN_NAND
> +     struct fdt_header fit;
> +
> +     debug("%s: PPA image load from NAND\n", __func__);
> +
> +     nand_init();
> +     ret = nand_read(nand_info[0], (loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
> +                    &fdt_header_len, (u_char *)&fit);
> +     if (ret == -EUCLEAN) {
> +             printf("NAND read of PPA FIT header at offset 0x%x failed\n",
> +                    CONFIG_SYS_LS_PPA_FW_ADDR);
> +             return -EIO;
> +     }
> +
> +     fw_length = fdt_totalsize(&fit);
> +
> +     ppa_fit_addr = malloc(fw_length);
> +     if (!ppa_fit_addr) {
> +             printf("PPA: malloc failed for PPA image(size 0x%zx)\n",
> +                    fw_length);
> +             return -ENOMEM;
> +     }
> +
> +     ret = nand_read(nand_info[0], (loff_t)CONFIG_SYS_LS_PPA_FW_ADDR,
> +                    &fw_length, (u_char *)ppa_fit_addr);
> +     if (ret == -EUCLEAN) {
> +             free(ppa_fit_addr);
> +             printf("NAND read of PPA firmware at offset 0x%x failed\n",
> +                    CONFIG_SYS_LS_PPA_FW_ADDR);
> +             return -EIO;
> +     }
>  #else
>  #error "No CONFIG_SYS_LS_PPA_FW_IN_xxx defined"
>  #endif
>

Why do you flush the cache after reading from SD but not from NAND?

York
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