[EXT] [PATCH] ARM: imx: Add OCRAM_S into iMX8M MMU tables

Ye Li
2021-02-26T07:15:49Z

Hi Marek,

On Thu, 2021-02-25 at 21:52 +0100, Marek Vasut wrote:
> Caution: EXT Email
>
> The OCRAM_S is regular memory, just like the OCRAM, add it to the MMU
> tables so it can be used and cached.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Fabio Estevam <festevam@gmail.com>
> Cc: Peng Fan <peng.fan@nxp.com>
> Cc: Stefano Babic <sbabic@denx.de>
> ---
> ?arch/arm/mach-imx/imx8m/soc.c | 7 +++++++
> ?1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-
> imx/imx8m/soc.c
> index 5456c10fb17..225e4e12500 100644
> --- a/arch/arm/mach-imx/imx8m/soc.c
> +++ b/arch/arm/mach-imx/imx8m/soc.c
> @@ -104,6 +104,13 @@ static struct mm_region imx8m_mem_map[] = {
> ????????????????.attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
> ?????????????????????????PTE_BLOCK_NON_SHARE |
> ?????????????????????????PTE_BLOCK_PXN | PTE_BLOCK_UXN
> +???????}, {
> +???????????????/* OCRAM_S */
> +???????????????.virt = 0x180000UL,
> +???????????????.phys = 0x180000UL,
> +???????????????.size = 0x8000UL,
> +???????????????.attrs = PTE_BLOCK_MEMTYPE(MT_NORMAL) |
> +????????????????????????PTE_BLOCK_OUTER_SHARE
> ????????}, {
> ????????????????/* TCM */
> ????????????????.virt = 0x7C0000UL,
> --
> 2.30.0
>
OCRAM_S is used by ATF and SPL to pass DDR CSR data. It is better not?
use it in u-boot to avoid any DDR issue.
And this?imx8m_mem_map will be modified at runtime to get rid of optee
memory. When OCRAM_S is added, the index used in?enable_caches and
dram_init need update as well.

Best regards,
Ye Li