Hi Peng,
On Wed, 13 Oct 2021 at 03:18, Peng Fan (OSS) peng.fan@oss.nxp.com wrote:
From: Peng Fan peng.fan@nxp.com
U-Boot binary is quite large with more options enabled, it not hurt on real silicon with high performance. But on simulation platform, it is quite slow to relocate the U-Boot binary to new address, so let's support skipping relocation.
Users could use 'gd->flags |= GD_FLG_SKIP_RELOC;' in board_early_init_f or other place that early than relocate_code.
Signed-off-by: Peng Fan peng.fan@nxp.com
arch/arm/lib/crt0_64.S | 6 ++++++ 1 file changed, 6 insertions(+)
Reviewed-by: Simon Glass sjg@chromium.org
diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S index 680e674fa3..d57ca84ee4 100644 --- a/arch/arm/lib/crt0_64.S +++ b/arch/arm/lib/crt0_64.S @@ -12,6 +12,7 @@ #include <config.h> #include <asm-offsets.h> #include <asm/macro.h> +#include <asm-generic/global_data.h> #include <linux/linkage.h>
/* @@ -95,6 +96,7 @@ ENTRY(_main) bl board_init_f
#if !defined(CONFIG_SPL_BUILD)
ldr x1, [x18, #GD_FLAGS]/*
- Set up intermediate environment (new sp and gd) and call
- relocate_code(addr_moni). Trick here is that we'll return
@@ -122,6 +124,10 @@ ENTRY(_main) ldr x9, [x18, #GD_RELOC_OFF] /* x9 <- gd->reloc_off */ add lr, lr, x9 /* new return address after relocation */ ldr x0, [x18, #GD_RELOCADDR] /* x0 <- gd->relocaddr */
tst x1, #GD_FLG_SKIP_RELOCbne relocation_return
Could we document this feature somewhere, or add a comment here as to why this is useful?
b relocate_coderelocation_return:
2.30.0
Regards, SImon