blob: 6f17187ab32aa00b0fa65ede9a5c2a00a524c651 [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.
* Basic entry code, called from the kernel's undefined instruction trap.
* r0 = faulted instruction
* r5 = faulted PC+4
* r9 = successful return
* r10 = thread_info structure
* lr = failure return
#include <linux/linkage.h>
#include <linux/init.h>
#include <asm/asm-offsets.h>
#include <asm/vfpmacros.h>
.globl do_vfp
ldr r4, .LCvfp
add r10, r10, #TI_VFPSTATE @ r10 = workspace
ldr pc, [r4] @ call VFP entry point
.word vfp_vector
@ This code is called if the VFP does not exist. It needs to flag the
@ failure to the VFP initialisation code.
.globl vfp_testing_entry
ldr r0, VFP_arch_address
str r5, [r0] @ known non-zero value
mov pc, r9 @ we have handled the fault
.word VFP_arch