u-boot/arch/arm/mach-zynq/lowlevel_init.S

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright (C) 2013 - 2015 Xilinx, Inc. All rights reserved.
 */

#include <asm-offsets.h>
#include <config.h>
#include <linux/linkage.h>

ENTRY(lowlevel_init)

	/* Enable the the VFP */
	mrc	p15, 0, r1, c1, c0, 2
	orr	r1, r1, #(0x3 << 20)
	orr	r1, r1, #(0x3 << 20)
	mcr	p15, 0, r1, c1, c0, 2
	isb
	fmrx	r1, FPEXC
	orr	r1,r1, #(1<<30)
	fmxr	FPEXC, r1

	/* Move back to caller */
	mov	pc, lr

ENDPROC(lowlevel_init)
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-06 21:58:06 +00:00			`/* SPDX-License-Identifier: GPL-2.0+ */`
ARM: zynq: Enable the Neon instructions 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> 2015-01-23 08:45:12 +00:00			`/*`
arm: zynq: Update years in copyright to reflect latest changes Updating year in zynq files. Also add missing Copyright to board.c. Signed-off-by: Michal Simek <michal.simek@xilinx.com> 2018-01-17 06:37:47 +00:00			`* Copyright (C) 2013 - 2015 Xilinx, Inc. All rights reserved.`
ARM: zynq: Enable the Neon instructions 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> 2015-01-23 08:45:12 +00:00			`*/`

			`#include <asm-offsets.h>`
			`#include <config.h>`
			`#include <linux/linkage.h>`

			`ENTRY(lowlevel_init)`

			`/* Enable the the VFP */`
			`mrc p15, 0, r1, c1, c0, 2`
			`orr r1, r1, #(0x3 << 20)`
			`orr r1, r1, #(0x3 << 20)`
			`mcr p15, 0, r1, c1, c0, 2`
			`isb`
			`fmrx r1, FPEXC`
			`orr r1,r1, #(1<<30)`
			`fmxr FPEXC, r1`

			`/* Move back to caller */`
			`mov pc, lr`

			`ENDPROC(lowlevel_init)`