1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 *  linux/arch/arm/vfp/entry.S
4 *
5 *  Copyright (C) 2004 ARM Limited.
6 *  Written by Deep Blue Solutions Limited.
7 */
8#include <linux/init.h>
9#include <linux/linkage.h>
10#include <asm/thread_info.h>
11#include <asm/vfpmacros.h>
12#include <asm/assembler.h>
13#include <asm/asm-offsets.h>
14
15@ VFP entry point.
16@
17@  r0  = instruction opcode (32-bit ARM or two 16-bit Thumb)
18@  r2  = PC value to resume execution after successful emulation
19@  r9  = normal "successful" return address
20@  r10 = this threads thread_info structure
21@  lr  = unrecognised instruction return address
22@  IRQs enabled.
23@
24ENTRY(do_vfp)
25	local_bh_disable r10, r4
26 	ldr	r4, .LCvfp
27	ldr	r11, [r10, #TI_CPU]	@ CPU number
28	add	r10, r10, #TI_VFPSTATE	@ r10 = workspace
29	ldr	pc, [r4]		@ call VFP entry point
30ENDPROC(do_vfp)
31
32ENTRY(vfp_null_entry)
33	local_bh_enable_ti r10, r4
34	ret	lr
35ENDPROC(vfp_null_entry)
36
37	.align	2
38.LCvfp:
39	.word	vfp_vector
40