Merge tag 'for-5.11-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux-2.6-microblaze.git] / arch / arm / vfp / entry.S
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 @
24 ENTRY(do_vfp)
25         inc_preempt_count 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
30 ENDPROC(do_vfp)
31
32 ENTRY(vfp_null_entry)
33         dec_preempt_count_ti r10, r4
34         ret     lr
35 ENDPROC(vfp_null_entry)
36
37         .align  2
38 .LCvfp:
39         .word   vfp_vector