blob: 2e78760f3495d900abf3d4d855197dc5164196f1 [file] [log] [blame]
* linux/arch/arm/vfp/entry.S
* Copyright (C) 2004 ARM Limited.
* Written by Deep Blue Solutions Limited.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#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.
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
dec_preempt_count_ti r10, r4
ret lr
.align 2
.word vfp_vector
@ This code is called if the VFP does not exist. It needs to flag the
@ failure to the VFP initialisation code.
dec_preempt_count_ti r10, r4
ldr r0, VFP_arch_address
str r0, [r0] @ set to non-zero value
ret r9 @ we have handled the fault
.align 2
.word VFP_arch