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mips: spl: Flush cache before jumping to U-Boot proper

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This patch adds a MIPS specific jump_to_image_no_args() implementation,
which flushes the U-Boot proper image loaded from the boot device in
SPL before jumping to it.

It has been noticed on MT76x8, that this cache flush is needed. Other
MIPS platforms might need it as well.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Weijie Gao <weijie.gao@mediatek.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Simon Goldschmidt <simon.k.r.goldschmidt@gmail.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Stefan Roese 2020-04-21 09:28:46 +02:00 committed by Daniel Schwierzeck
parent 814a8916a9
commit 2a9d68e41f
2 changed files with 22 additions and 0 deletions
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1
arch/mips/lib/Makefile
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@ -12,5 +12,6 @@ obj-y += traps.o
obj-$(CONFIG_CMD_BOOTM) += bootm.o
obj-$(CONFIG_CMD_GO) += boot.o
obj-$(CONFIG_SPL_BUILD) += spl.o
lib-$(CONFIG_USE_PRIVATE_LIBGCC) += ashldi3.o ashrdi3.o lshrdi3.o

21
arch/mips/lib/spl.c Normal file
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@ -0,0 +1,21 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2020 Stefan Roese <sr@denx.de>
*/
#include <common.h>
#include <cpu_func.h>
#include <spl.h>
void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
{
typedef void __noreturn (*image_entry_noargs_t)(void);
image_entry_noargs_t image_entry =
(image_entry_noargs_t)spl_image->entry_point;
/* Flush cache before jumping to application */
flush_cache((unsigned long)spl_image->load_addr, spl_image->size);
debug("image entry point: 0x%lx\n", spl_image->entry_point);
image_entry();
}