upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/arch/x86/include/asm/cmos_layout.h

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2017, Bin Meng <bmeng.cn@gmail.com>
*/
#ifndef __CMOS_LAYOUT_H
#define __CMOS_LAYOUT_H
/*
* The RTC internal registers and RAM is organized as two banks of 128 bytes
* each, called the standard and extended banks. The first 14 bytes of the
* standard bank contain the RTC time and date information along with four
* registers, A - D, that are used for configuration of the RTC. The extended
* bank contains a full 128 bytes of battery backed SRAM.
*
* For simplicity in U-Boot we only support CMOS in the standard bank, and
* its base address starts from offset 0x10, which leaves us 112 bytes space.
*/
#define CMOS_BASE 0x10
/*
* The file records all offsets off CMOS_BASE that is currently used by
* U-Boot for various reasons. It is put in such a unified place in order
* to be consistent across platforms.
*/
/* stack address for S3 boot in a FSP configuration, 4 bytes */
#define CMOS_FSP_STACK_ADDR CMOS_BASE
#endif /* __CMOS_LAYOUT_H */