[U-Boot] [PATCH 1/2] ARMv8: enable pre-allocation malloc

[Albert ARIBAUD]

Hello fenghua at phytium.com.cn,

On Sat, 31 Jan 2015 11:55:28 +0800, fenghua at phytium.com.cn <fenghua at phytium.com.cn> wrote:
> From: David Feng <fenghua at phytium.com.cn>
> 
> Allocate memory space for pre-allocation malloc and zero global data.
> This code is partly from crt0.S.
> 
> Signed-off-by: David Feng <fenghua at phytium.com.cn>
> ---
>  arch/arm/include/asm/config.h |    4 ----
>  arch/arm/lib/crt0_64.S        |   13 +++++++++++--
>  2 files changed, 11 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/include/asm/config.h b/arch/arm/include/asm/config.h
> index be80434..7a34a01 100644
> --- a/arch/arm/include/asm/config.h
> +++ b/arch/arm/include/asm/config.h
> @@ -7,10 +7,6 @@
>  #ifndef _ASM_CONFIG_H_
>  #define _ASM_CONFIG_H_
>  
> -#ifdef __aarch64__
> -#define CONFIG_SYS_GENERIC_GLOBAL_DATA
> -#endif
> -
>  #define CONFIG_LMB
>  #define CONFIG_SYS_BOOT_RAMDISK_HIGH
>  
> diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S
> index 7756396..1654011 100644
> --- a/arch/arm/lib/crt0_64.S
> +++ b/arch/arm/lib/crt0_64.S
> @@ -62,9 +62,18 @@ ENTRY(_main)
>   * Set up initial C runtime environment and call board_init_f(0).
>   */
>  	ldr	x0, =(CONFIG_SYS_INIT_SP_ADDR)
> -	sub	x0, x0, #GD_SIZE	/* allocate one GD above SP */
> +	sub	x18, x0, #GD_SIZE	/* allocate one GD above SP */
> +	bic	x18, x18, #0x7		/* 8-byte alignment for GD */
> +zero_gd:
> +	sub	x0, x0, #0x8
> +	str	xzr, [x0]
> +	cmp	x0, x18
> +	b.gt	zero_gd
> +#if defined(CONFIG_SYS_MALLOC_F_LEN)
> +	sub	x0, x18, #CONFIG_SYS_MALLOC_F_LEN
> +	str	x0, [x18, #GD_MALLOC_BASE]
> +#endif
>  	bic	sp, x0, #0xf	/* 16-byte alignment for ABI compliance */
> -	mov	x18, sp			/* GD is above SP */
>  	mov	x0, #0
>  	bl	board_init_f
>  
> -- 
> 1.7.9.5
> 
> 

Applied to u-boot-arm/master, thanks!

Amicalement,
-- 
Albert.