mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-28 15:41:40 +00:00
c08cfc2d2c
Added the lowlevel_init to enable the Neon instructions. Initially the u-boot was causing undefined instruction exception if loaded through tcl, and working fine if loaded through FSBL. The exception was causing in convertion formula of given time to ticks. It was because, the Neon instructions were disabled and hence causing the undefined exception. In FSBL case, the FSBL was enabling the Neon instructions. Hence, added the lowlevel_init to enable the Neon instructions. Also enable neon instructions for non-xilinx toolchain. Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com> Acked-by: Radhey Shyam Pandey <radheys@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
26 lines
453 B
ArmAsm
26 lines
453 B
ArmAsm
/*
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* Copyright (C) 2013 Xilinx, Inc. All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <asm-offsets.h>
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#include <config.h>
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#include <linux/linkage.h>
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ENTRY(lowlevel_init)
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/* Enable the the VFP */
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mrc p15, 0, r1, c1, c0, 2
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orr r1, r1, #(0x3 << 20)
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orr r1, r1, #(0x3 << 20)
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mcr p15, 0, r1, c1, c0, 2
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isb
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fmrx r1, FPEXC
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orr r1,r1, #(1<<30)
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fmxr FPEXC, r1
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/* Move back to caller */
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mov pc, lr
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ENDPROC(lowlevel_init)
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