[U-Boot] [PATCH v1] imx6sx: Fix i.MX6SX HAB api function table offset

[Stefano Babic]

Hi Nitin, hi Fabio,

thanks for immediately fix the issue - I have some comments.

On 30/09/2014 17:40, Nitin Garg wrote:
> i.MX6SX ROM implements unified table sections.
> The HAB function table is at offset 0x100. Update
> the HAB function pointers accordingly.
> 
> Signed-off-by: Nitin Garg <nitin.garg at freescale.com>
> Tested-by: Fabio Estevam <fabio.estevam at freescale.com>
> 
> ---
> 
>  arch/arm/include/asm/arch-mx6/hab.h |   16 +++++++++++-----
>  include/configs/mx6_common.h        |    4 ++++
>  2 files changed, 15 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/include/asm/arch-mx6/hab.h b/arch/arm/include/asm/arch-mx6/hab.h
> index 1f12695..c53709b 100644
> --- a/arch/arm/include/asm/arch-mx6/hab.h
> +++ b/arch/arm/include/asm/arch-mx6/hab.h
> @@ -53,11 +53,17 @@ typedef void *hab_rvt_authenticate_image_t(uint8_t, ptrdiff_t,
>  		void **, size_t *, hab_loader_callback_f_t);
>  typedef void hapi_clock_init_t(void);
>  
> -#define HAB_RVT_REPORT_EVENT                   (*(uint32_t *)0x000000B4)
> -#define HAB_RVT_REPORT_STATUS                  (*(uint32_t *)0x000000B8)
> -#define HAB_RVT_AUTHENTICATE_IMAGE             (*(uint32_t *)0x000000A4)
> -#define HAB_RVT_ENTRY                          (*(uint32_t *)0x00000098)
> -#define HAB_RVT_EXIT                           (*(uint32_t *)0x0000009C)
> +#ifdef CONFIG_ROM_UNIFIED_SECTIONS
> +#define HAB_RVT_BASE			0x00000100
> +#else
> +#define HAB_RVT_BASE			0x00000094
> +#endif

It would be nice to understand how the choice is done. In my
understanding, even HAB_RVT_REPORT_EVENT_NEW and
HAB_RVT_REPORT_STATUS_NEW can be dropped and substituted by an offset.

I see then three cases:

	mx6sx	HAB_RVT_BASE = 0x00000100

	mx6q with soc_rev() > 1.5 	HAB_RVT_BASE = 0x0000098
		or
	mx6dl with soc_rev > 1.2


	mx6q with soc_rev() < 1.5 	HAB_RVT_BASE = 0x0000094
		or
	mx6d with soc_rev() < 1.2

then the single entries can be calculated from the base address.

> +
> +#define HAB_RVT_ENTRY			(*(uint32_t *)(HAB_RVT_BASE + 0x04))
> +#define HAB_RVT_EXIT			(*(uint32_t *)(HAB_RVT_BASE + 0x08))
> +#define HAB_RVT_AUTHENTICATE_IMAGE	(*(uint32_t *)(HAB_RVT_BASE + 0x10))
> +#define HAB_RVT_REPORT_EVENT		(*(uint32_t *)(HAB_RVT_BASE + 0x20))
> +#define HAB_RVT_REPORT_STATUS		(*(uint32_t *)(HAB_RVT_BASE + 0x24))
>  
>  #define HAB_RVT_REPORT_EVENT_NEW               (*(uint32_t *)0x000000B8)
>  #define HAB_RVT_REPORT_STATUS_NEW              (*(uint32_t *)0x000000BC)
> diff --git a/include/configs/mx6_common.h b/include/configs/mx6_common.h
> index 135a3f5..824e73f 100644
> --- a/include/configs/mx6_common.h
> +++ b/include/configs/mx6_common.h
> @@ -30,4 +30,8 @@
>  
>  #define CONFIG_MP
>  
> +#ifdef CONFIG_MX6SX
> +#define CONFIG_ROM_UNIFIED_SECTIONS

I do not like this approach because we do not need an additional
CONFIG_, that remains undocumented. If CONFIG_MX6SX, HAB_RVT_BASE is
always 0x100 - CONFIG_ROM_UNIFIED_SECTIONS is like a redundant
information, because it is not possible (or is it ?) to have a sx
processor with a different base address.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic at denx.de
=====================================================================