mirror of
https://source.denx.de/u-boot/u-boot.git
synced 2025-10-31 08:21:36 +01:00
e6a0586277
TPL builds today don't need to call into firmware or set up the MMU (if this changes, it should be controlled through a config option whether to include this or not), but include the needed support code for this anyway. By moving these unused low-level functions into seperate function-sections, the linker can garbage-collect the unused sections. Note that (if DM support is enabled), there will be a call to the cache-flushing code from alloc_priv(...) in drivers/core/device.c. This then add 52 bytes of binary size (an increase from 20589 to 20641 bytes) compared to completely removing this code. Even for a feature-rich TPL (including DM support as for the RK3368), this equates to a size difference of significantly more than 10% in TPL binary size. Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com> Reviewed-by: Simon Glass <sjg@chromium.org>
53 lines
1.1 KiB
ArmAsm
53 lines
1.1 KiB
ArmAsm
/*
|
|
* (C) Copyright 2013
|
|
* David Feng <fenghua@phytium.com.cn>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <asm-offsets.h>
|
|
#include <config.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/macro.h>
|
|
|
|
.pushsection .text.armv8_switch_to_el2, "ax"
|
|
ENTRY(armv8_switch_to_el2)
|
|
switch_el x6, 1f, 0f, 0f
|
|
0:
|
|
cmp x5, #ES_TO_AARCH64
|
|
b.eq 2f
|
|
/*
|
|
* When loading 32-bit kernel, it will jump
|
|
* to secure firmware again, and never return.
|
|
*/
|
|
bl armv8_el2_to_aarch32
|
|
2:
|
|
/*
|
|
* x4 is kernel entry point or switch_to_el1
|
|
* if CONFIG_ARMV8_SWITCH_TO_EL1 is defined.
|
|
* When running in EL2 now, jump to the
|
|
* address saved in x4.
|
|
*/
|
|
br x4
|
|
1: armv8_switch_to_el2_m x4, x5, x6
|
|
ENDPROC(armv8_switch_to_el2)
|
|
.popsection
|
|
|
|
.pushsection .text.armv8_switch_to_el1, "ax"
|
|
ENTRY(armv8_switch_to_el1)
|
|
switch_el x6, 0f, 1f, 0f
|
|
0:
|
|
/* x4 is kernel entry point. When running in EL1
|
|
* now, jump to the address saved in x4.
|
|
*/
|
|
br x4
|
|
1: armv8_switch_to_el1_m x4, x5, x6
|
|
ENDPROC(armv8_switch_to_el1)
|
|
.popsection
|
|
|
|
.pushsection .text.armv8_el2_to_aarch32, "ax"
|
|
WEAK(armv8_el2_to_aarch32)
|
|
ret
|
|
ENDPROC(armv8_el2_to_aarch32)
|
|
.popsection
|