forked from ~ljy/RK3588_XEN
| commit | author | age | ||
| a07526 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| H | 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 | |
| 2f529f | 26 | disable_irq_if_pipelined |
| a07526 | 27 | ldr r4, .LCvfp |
| H | 28 | ldr r11, [r10, #TI_CPU] @ CPU number |
| 29 | add r10, r10, #TI_VFPSTATE @ r10 = workspace | |
| 30 | ldr pc, [r4] @ call VFP entry point | |
| 31 | ENDPROC(do_vfp) | |
| 32 | ||
| 33 | ENTRY(vfp_null_entry) | |
| 2f529f | 34 | enable_irq_if_pipelined |
| a07526 | 35 | dec_preempt_count_ti r10, r4 |
| H | 36 | ret lr |
| 37 | ENDPROC(vfp_null_entry) | |
| 38 | ||
| 39 | .align 2 | |
| 40 | .LCvfp: | |
| 41 | .word vfp_vector | |
