mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-11 22:03:15 +00:00
af654d1461
This patch extends the misc_init_r() function on sunxi boards
to test for the presence of a suitable "sunxi" SPL header. If
found, and the loader ("fel" utility) provided a non-zero value
for the boot.scr address, then the corresponding environment
variable fel_scriptaddr gets set.
misc_init_r() also sets (or clears) the "fel_booted" variable depending
on the active boot device, using the same logic as spl_boot_device().
The goal is to provide sufficient information (within the U-Boot
environment) to make intelligent decisions on how to continue the boot
process, allowing specific customizations for the "FEL boot" case.
Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/*
|
|
* (C) Copyright 2007-2011
|
|
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
|
|
* Tom Cubie <tangliang@allwinnertech.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
#ifndef _ASM_ARCH_SPL_H_
|
|
#define _ASM_ARCH_SPL_H_
|
|
|
|
#define BOOT0_MAGIC "eGON.BT0"
|
|
#define SPL_SIGNATURE "SPL" /* marks "sunxi" SPL header */
|
|
#define SPL_HEADER_VERSION 1
|
|
|
|
/* Note: A80 will require special handling here: SPL_ADDR 0x10000 */
|
|
#define SPL_ADDR 0x0
|
|
|
|
/* boot head definition from sun4i boot code */
|
|
struct boot_file_head {
|
|
uint32_t b_instruction; /* one intruction jumping to real code */
|
|
uint8_t magic[8]; /* ="eGON.BT0" or "eGON.BT1", not C-style str */
|
|
uint32_t check_sum; /* generated by PC */
|
|
uint32_t length; /* generated by PC */
|
|
/*
|
|
* We use a simplified header, only filling in what is needed
|
|
* by the boot ROM. To be compatible with Allwinner tools we
|
|
* would need to implement the proper fields here instead of
|
|
* padding.
|
|
*
|
|
* Actually we want the ability to recognize our "sunxi" variant
|
|
* of the SPL. To do so, let's place a special signature into the
|
|
* "pub_head_size" field. We can reasonably expect Allwinner's
|
|
* boot0 to always have the upper 16 bits of this set to 0 (after
|
|
* all the value shouldn't be larger than the limit imposed by
|
|
* SRAM size).
|
|
* If the signature is present (at 0x14), then we know it's safe
|
|
* to use the remaining 8 bytes (at 0x18) for our own purposes.
|
|
* (E.g. sunxi-tools "fel" utility can pass information there.)
|
|
*/
|
|
union {
|
|
uint32_t pub_head_size;
|
|
uint8_t spl_signature[4];
|
|
};
|
|
uint32_t fel_script_address;
|
|
uint32_t reserved; /* padding, align to 32 bytes */
|
|
};
|
|
|
|
#define is_boot0_magic(addr) (memcmp((void *)addr, BOOT0_MAGIC, 8) == 0)
|
|
|
|
#endif
|