Re: [PATCH v2 4/6] ARM: Rockchip: rk3568: use rk3568_barebox_entry()

[Sascha Hauer <s.hauer@pengutronix.de>]

On Tue, Mar 28, 2023 at 09:40:35AM +0200, Sascha Hauer wrote:
> There is a rk3568 specific entry function for barebox now, switch
> the existing boards over to use it.
> 
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  arch/arm/boards/pine64-quartz64/lowlevel.c    | 30 +++--------------
>  arch/arm/boards/radxa-rock3/lowlevel.c        | 31 +++---------------
>  .../rockchip-rk3568-bpi-r2pro/lowlevel.c      | 31 +++---------------
>  .../arm/boards/rockchip-rk3568-evb/lowlevel.c | 32 +++----------------
>  4 files changed, 17 insertions(+), 107 deletions(-)
> 
> diff --git a/arch/arm/boards/pine64-quartz64/lowlevel.c b/arch/arm/boards/pine64-quartz64/lowlevel.c
> index 1e63c0e698..975f8aa51c 100644
> --- a/arch/arm/boards/pine64-quartz64/lowlevel.c
> +++ b/arch/arm/boards/pine64-quartz64/lowlevel.c
> @@ -1,41 +1,19 @@
>  // SPDX-License-Identifier: GPL-2.0-only
> +
>  #include <common.h>
> -#include <linux/sizes.h>
> -#include <asm/barebox-arm-head.h>
>  #include <asm/barebox-arm.h>
>  #include <mach/rockchip/hardware.h>
>  #include <mach/rockchip/atf.h>
>  #include <debug_ll.h>
> -#include <mach/rockchip/rockchip.h>
>  
>  extern char __dtb_rk3566_quartz64_a_start[];
>  
> -static noinline void start_quartz64(void)
> -{
> -	void *fdt = __dtb_rk3566_quartz64_a_start;
> -
> -	if (current_el() == 3) {
> -		rk3568_lowlevel_init();
> -		rk3568_atf_load_bl31(fdt);
> -		/* not reached */
> -	}
> -
> -	barebox_arm_entry(RK3568_DRAM_BOTTOM, 0x80000000 - RK3568_DRAM_BOTTOM,
> -			  fdt);
> -}
> -
>  ENTRY_FUNCTION(start_quartz64a, r0, r1, r2)
>  {
> -	/*
> -	 * Image execution starts at 0x0, but this is used for ATF and
> -	 * OP-TEE later, so move away from here.
> -	 */
> -	if (current_el() == 3)
> -		relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);
> -	else
> -		relocate_to_current_adr();
> +	putc_ll('>');
>  
> +	relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);

This doesn't work when barebox is started from another barebox, because
it places the new barebox at an address near
RK3568_BAREBOX_LOAD_ADDRESS. Calling relocate_to_adr_full() will
partly overwrite the image. I'll revert this change to what has been
done before:

	if (current_el() == 3)
		relocate_to_adr_full(RK3568_BAREBOX_LOAD_ADDRESS);
	else
		relocate_to_current_adr();

Sascha

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