From b263302aa588464cec3bbdde09e2b52765dbae9e Mon Sep 17 00:00:00 2001 From: David Feng Date: Sat, 31 Jan 2015 11:55:28 +0800 Subject: [PATCH] ARMv8: enable pre-allocation malloc Allocate memory space for pre-allocation malloc and zero global data. This code is partly from crt0.S. Signed-off-by: David Feng --- 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 be80434dee..7a34a0186c 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 77563967e5..1654011432 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 -- 2.39.5