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/arc/cpu/arcv2/ivt.S

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/*
* Copyright (C) 2013-2015 Synopsys, Inc. All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0+
*/
.section .ivt, "a",@progbits
.align 4
/* Critical system events */
.word _start /* 0x00 - Reset */
.word memory_error /* 0x01 - Memory Error */
.word instruction_error /* 0x02 - Instruction Error */
/* Exceptions */
.word EV_MachineCheck /* 0x03 - Fatal Machine check */
.word EV_TLBMissI /* 0x04 - Intruction TLB miss */
.word EV_TLBMissD /* 0x05 - Data TLB miss */
.word EV_TLBProtV /* 0x06 - Protection Violation or Misaligned Access */
.word EV_PrivilegeV /* 0x07 - Privilege Violation */
.word EV_SWI /* 0x08 - Software Interrupt */
.word EV_Trap /* 0x09 - Trap */
.word EV_Extension /* 0x0A - Extension Intruction Exception */
.word EV_DivZero /* 0x0B - Division by Zero */
.word EV_DCError /* 0x0C - Data cache consistency error */
.word EV_Maligned /* 0x0D - Misaligned data access */
.word 0 /* 0x0E - Unused */
.word 0 /* 0x0F - Unused */
/* Device interrupts */
.rept 240
.word interrupt_handler /* 0x10 - 0xFF */
.endr