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/blackfin/include/asm/mach-common/bits/trace.h

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/*
* Trace Unit Masks
*/
#ifndef __BFIN_PERIPHERAL_TRACE__
#define __BFIN_PERIPHERAL_TRACE__
/* Trace Buffer Control (TBUFCTL) Register Masks */
#define TBUFPWR 0x00000001
#define TBUFEN 0x00000002
#define TBUFOVF 0x00000004
#define CMPLB_SINGLE 0x00000008
#define CMPLP_DOUBLE 0x00000010
#define CMPLB (CMPLB_SINGLE | CMPLP_DOUBLE)
/* Trace Buffer Status (TBUFSTAT) Register Masks */
#define TBUFCNT 0x0000001F
#endif