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/arm/cpu/armv8/fsl-lsch3/mp.h

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/*
* Copyright 2014, Freescale Semiconductor
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _FSL_CH3_MP_H
#define _FSL_CH3_MP_H
/*
* Each spin table element is defined as
* struct {
* uint64_t entry_addr;
* uint64_t status;
* uint64_t lpid;
* };
* we pad this struct to 64 bytes so each entry is in its own cacheline
* the actual spin table is an array of these structures
*/
#define SPIN_TABLE_ELEM_ENTRY_ADDR_IDX 0
#define SPIN_TABLE_ELEM_STATUS_IDX 1
#define SPIN_TABLE_ELEM_LPID_IDX 2
#define WORDS_PER_SPIN_TABLE_ENTRY 8 /* pad to 64 bytes */
#define SPIN_TABLE_ELEM_SIZE 64
#define id_to_core(x) ((x & 3) | (x >> 6))
#ifndef __ASSEMBLY__
extern u64 __spin_table[];
extern u64 *secondary_boot_code;
extern size_t __secondary_boot_code_size;
int fsl_lsch3_wake_seconday_cores(void);
void *get_spin_tbl_addr(void);
phys_addr_t determine_mp_bootpg(void);
void secondary_boot_func(void);
#endif
#endif /* _FSL_CH3_MP_H */