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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/arm/vfp/entry.S
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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1/*
2 * linux/arch/arm/vfp/entry.S
3 *
4 * Copyright (C) 2004 ARM Limited.
5 * Written by Deep Blue Solutions Limited.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Basic entry code, called from the kernel's undefined instruction trap.
12 * r0 = faulted instruction
13 * r5 = faulted PC+4
14 * r9 = successful return
15 * r10 = thread_info structure
16 * lr = failure return
17 */
18#include <linux/linkage.h>
19#include <linux/init.h>
20#include <asm/constants.h>
21#include <asm/vfpmacros.h>
22
23 .globl do_vfp
24do_vfp:
25 ldr r4, .LCvfp
26 add r10, r10, #TI_VFPSTATE @ r10 = workspace
27 ldr pc, [r4] @ call VFP entry point
28
29.LCvfp:
30 .word vfp_vector
31
32@ This code is called if the VFP does not exist. It needs to flag the
33@ failure to the VFP initialisation code.
34
35 __INIT
36 .globl vfp_testing_entry
37vfp_testing_entry:
38 ldr r0, VFP_arch_address
39 str r5, [r0] @ known non-zero value
40 mov pc, r9 @ we have handled the fault
41
42VFP_arch_address:
43 .word VFP_arch
44
45 __FINIT