[PATCH v2 13/15] mach-snapdragon: Support booting as a coreboot payload

[Caleb Connolly]

On 2/26/25 23:15, Stephen Boyd wrote:
> Coreboot sets up the DRAM, CPU, and devices before booting a payload,
> meaning we can parse the coreboot tables at boot for memory info when
> running as a payload. Use the memory descriptors from coreboot if the
> tables are present so that Snapdragon SoCs can run U-boot as a coreboot
> payload.
> 
> Signed-off-by: Stephen Boyd <swboyd at chromium.org>

Reviewed-by: Caleb Connolly <caleb.connolly at linaro.org>
> ---
>   arch/arm/mach-snapdragon/board.c | 18 ++++++++++++++++++
>   1 file changed, 18 insertions(+)
> 
> diff --git a/arch/arm/mach-snapdragon/board.c b/arch/arm/mach-snapdragon/board.c
> index 2ef936aab757..cb3df1c2adec 100644
> --- a/arch/arm/mach-snapdragon/board.c
> +++ b/arch/arm/mach-snapdragon/board.c
> @@ -14,6 +14,7 @@
>   #include <asm/io.h>
>   #include <asm/psci.h>
>   #include <asm/system.h>
> +#include <cb_sysinfo.h>
>   #include <dm/device.h>
>   #include <dm/pinctrl.h>
>   #include <dm/uclass-internal.h>
> @@ -48,6 +49,10 @@ static struct {
>   
>   int dram_init(void)
>   {
> +#ifdef CONFIG_SYS_COREBOOT
> +	if (gd->arch.coreboot_table)
> +		return coreboot_dram_init();
> +#endif
>   	/*
>   	 * gd->ram_base / ram_size have been setup already
>   	 * in qcom_parse_memory().
> @@ -81,8 +86,21 @@ static void qcom_configure_bi_dram(void)
>   	}
>   }
>   
> +phys_addr_t board_get_usable_ram_top(phys_size_t total_size)
> +{
> +#ifdef CONFIG_SYS_COREBOOT
> +	if (gd->arch.coreboot_table)
> +		return coreboot_board_get_usable_ram_top(total_size);
> +#endif
> +	return gd->ram_top;
> +}
> +
>   int dram_init_banksize(void)
>   {
> +#ifdef CONFIG_SYS_COREBOOT
> +	if (gd->arch.coreboot_table)
> +		return coreboot_dram_init_banksize();
> +#endif
>   	qcom_configure_bi_dram();
>   
>   	return 0;

-- 
Caleb (they/them)