diff options
Diffstat (limited to '')
| -rw-r--r-- | arch/arm/vfp/entry.S | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/arm/vfp/entry.S b/arch/arm/vfp/entry.S new file mode 100644 index 000000000..27b0a1f27 --- /dev/null +++ b/arch/arm/vfp/entry.S @@ -0,0 +1,39 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/vfp/entry.S + * + * Copyright (C) 2004 ARM Limited. + * Written by Deep Blue Solutions Limited. + */ +#include <linux/init.h> +#include <linux/linkage.h> +#include <asm/thread_info.h> +#include <asm/vfpmacros.h> +#include <asm/assembler.h> +#include <asm/asm-offsets.h> + +@ VFP entry point. +@ +@ r0 = instruction opcode (32-bit ARM or two 16-bit Thumb) +@ r2 = PC value to resume execution after successful emulation +@ r9 = normal "successful" return address +@ r10 = this threads thread_info structure +@ lr = unrecognised instruction return address +@ IRQs enabled. +@ +ENTRY(do_vfp) + inc_preempt_count r10, r4 + ldr r4, .LCvfp + ldr r11, [r10, #TI_CPU] @ CPU number + add r10, r10, #TI_VFPSTATE @ r10 = workspace + ldr pc, [r4] @ call VFP entry point +ENDPROC(do_vfp) + +ENTRY(vfp_null_entry) + dec_preempt_count_ti r10, r4 + ret lr +ENDPROC(vfp_null_entry) + + .align 2 +.LCvfp: + .word vfp_vector |