mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-21 10:43:06 +00:00
6b780e441b
The CONFIG_ROCKCHIP_SPL_RESERVE_IRAM is for SPL only, add condition to limit it not affect TPL. Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
60 lines
2 KiB
C
60 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Copyright 2017 Theobroma Systems Design und Consulting GmbH
|
|
*/
|
|
|
|
/*
|
|
* Execution starts on the instruction following this 4-byte header
|
|
* (containing the magic 'RK30', 'RK31', 'RK32' or 'RK33'). This
|
|
* magic constant will be written into the final image by the rkimage
|
|
* tool, but we need to reserve space for it here.
|
|
*
|
|
* To make life easier for everyone, we build the SPL binary with
|
|
* space for this 4-byte header already included in the binary.
|
|
*/
|
|
#ifdef CONFIG_SPL_BUILD
|
|
/*
|
|
* We need to add 4 bytes of space for the 'RK33' at the
|
|
* beginning of the executable. However, as we want to keep
|
|
* this generic and make it applicable to builds that are like
|
|
* the RK3368 (TPL needs this, SPL doesn't) or the RK3399 (no
|
|
* TPL, but extra space needed in the SPL), we simply insert
|
|
* a branch-to-next-instruction-word with the expectation that
|
|
* the first one may be overwritten, if this is the first stage
|
|
* contained in the final image created with mkimage)...
|
|
*/
|
|
b 1f /* if overwritten, entry-address is at the next word */
|
|
1:
|
|
#endif
|
|
#if CONFIG_IS_ENABLED(ROCKCHIP_EARLYRETURN_TO_BROM)
|
|
adr r3, entry_counter
|
|
ldr r0, [r3]
|
|
cmp r0, #1 /* check if entry_counter == 1 */
|
|
beq reset /* regular bootup */
|
|
add r0, #1
|
|
str r0, [r3] /* increment the entry_counter in memory */
|
|
mov r0, #0 /* return 0 to the BROM to signal 'OK' */
|
|
bx lr /* return control to the BROM */
|
|
entry_counter:
|
|
.word 0
|
|
#endif
|
|
|
|
#if (defined(CONFIG_SPL_BUILD) || defined(CONFIG_ARM64))
|
|
/* U-Boot proper of armv7 do not need this */
|
|
b reset
|
|
#endif
|
|
|
|
#if !defined(CONFIG_ARM64)
|
|
/*
|
|
* For armv7, the addr '_start' will used as vector start address
|
|
* and write to VBAR register, which needs to aligned to 0x20.
|
|
*/
|
|
.align(5), 0x0
|
|
_start:
|
|
ARM_VECTORS
|
|
#endif
|
|
|
|
#if !defined(CONFIG_TPL_BUILD) && defined(CONFIG_SPL_BUILD) && \
|
|
(CONFIG_ROCKCHIP_SPL_RESERVE_IRAM > 0)
|
|
.space CONFIG_ROCKCHIP_SPL_RESERVE_IRAM /* space for the ATF data */
|
|
#endif
|