[U-Boot] [PATCH 2/2] powerpc/mpc85xx: T104x: Add nand secure boot target

[York Sun]

On 04/01/2016 12:09 AM, Sumit Garg wrote:
> For mpc85xx SoCs, the core begins execution from address 0xFFFFFFFC.
> In non-secure boot scenario from NAND, this address will map to CPC
> configured as SRAM. But in case of secure boot, this default address
> always maps to IBR (Internal Boot ROM).
> The IBR code requires that the bootloader(U-boot) must lie in 0 to 3.5G
> address space i.e. 0x0 - 0xDFFFFFFF.
> 
> For secure boot target from NAND, the text base for SPL is kept same as
> non-secure boot target i.e. 0xFFFx_xxxx but the SPL U-boot binary will
> be copied to CPC configured as SRAM with address in 0-3.5G(0xBFFC_0000)
> As a the virtual and physical address of CPC would be different. The
> virtual address 0xFFFx_xxxx needs to be mapped to physical address
> 0xBFFx_xxxx.
> 
> Create a new PBI file to configure CPC as SRAM with address 0xBFFC0000
> and update DCFG SCRTACH1 register with location of Header required for
> secure boot.
> 
> The changes are similar to
> commit 467a40dfe35f48d830f01a72617207d03ca85b4d
>     powerpc/mpc85xx: SECURE BOOT- NAND secure boot target for P3041
> 
> While P3041 has a 1MB CPC and does not require SPL. On T104x, CPC
> is only 256K and thus SPL framework is used.
> The changes are only applicable for SPL U-Boot running out of CPC SRAM
> and not the next level U-Boot loaded on DDR.
> 
> Reviewed-by: Ruchika Gupta <ruchika.gupta at nxp.com>
> Signed-off-by: Aneesh Bansal <aneesh.bansal at nxp.com>
> Signed-off-by: Sumit Garg <sumit.garg at nxp.com>
> ---
>  arch/powerpc/cpu/mpc85xx/cpu_init.c            |  4 +--
>  arch/powerpc/cpu/mpc85xx/start.S               | 11 ++++++--
>  arch/powerpc/include/asm/fsl_secure_boot.h     | 10 ++++++-
>  board/freescale/t104xrdb/t104x_pbi_sb.cfg      | 38 ++++++++++++++++++++++++++
>  board/freescale/t104xrdb/tlb.c                 | 15 +++++++++-
>  configs/T1042RDB_PI_NAND_SECURE_BOOT_defconfig | 11 ++++++++
>  include/configs/T104xRDB.h                     | 29 +++++++++++++++++++-
>  7 files changed, 110 insertions(+), 8 deletions(-)
>  create mode 100644 board/freescale/t104xrdb/t104x_pbi_sb.cfg
>  create mode 100644 configs/T1042RDB_PI_NAND_SECURE_BOOT_defconfig
> 

Sumit,

Please rebase your patch to latest master branch. I am seeing compiling errors
due to upstream changes.

Thanks.

York