[U-Boot] [PATCH 1/7] arm: K3: Avoid use of MCU_PSRAM0 before SYSFW is loaded

[Tom Rini <trini@konsulko.com>]

On Wed, Feb 13, 2019 at 12:37:06PM -0600, Andrew F. Davis wrote:
> On HS devices the 512b region of reset isolated memory called
> MCU_PSRAM0 is firewalled by default. Until SYSFW is loaded we
> cannot use this memory. It is only used to store a single value
> left at the end of SRAM by ROM that will be needed later. Save
> that value to a global variable stored in the .data section.
> This section is used as .bss will be cleared between saving
> this value and using it.
> 
> Signed-off-by: Andrew F. Davis <afd@ti.com>
> ---
>  arch/arm/mach-k3/am6_init.c                  | 8 +++-----
>  arch/arm/mach-k3/include/mach/am6_hardware.h | 3 ---
>  2 files changed, 3 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm/mach-k3/am6_init.c b/arch/arm/mach-k3/am6_init.c
> index a5553190b4..462538e45d 100644
> --- a/arch/arm/mach-k3/am6_init.c
> +++ b/arch/arm/mach-k3/am6_init.c
> @@ -49,11 +49,11 @@ static void ctrl_mmr_unlock(void)
>  	mmr_unlock(CTRL_MMR0_BASE, 7);
>  }
>  
> +u32 bootindex __attribute__((section(".data")));
> +

We need a comment above this one so it's clear down the line to others
why we're doing something odd like this, thanks!

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20190213/c35a341a/attachment.sig>