diff options
| author | David Feng <fenghua@phytium.com.cn> | 2015-01-31 11:55:28 +0800 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-03-27 16:28:58 +0100 |
| commit | b263302aa588464cec3bbdde09e2b52765dbae9e (patch) | |
| tree | 3e92efaf2431fe745addb8251d79a668f20337ae /arch/arm/lib | |
| parent | f643d9294f45487f22e8f33d6572530f17eff4e9 (diff) | |
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 <fenghua@phytium.com.cn>
Diffstat (limited to 'arch/arm/lib')
| -rw-r--r-- | arch/arm/lib/crt0_64.S | 13 |
1 files changed, 11 insertions, 2 deletions
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 |