ia64/linux-2.6.18-xen.hg

view arch/mips/kernel/r6000_fpu.S @ 452:c7ed6fe5dca0

kexec: dont initialise regions in reserve_memory()

There is no need to initialise efi_memmap_res and boot_param_res in
reserve_memory() for the initial xen domain as it is done in
machine_kexec_setup_resources() using values from the kexec hypercall.

Signed-off-by: Simon Horman <horms@verge.net.au>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 28 10:55:18 2008 +0000 (2008-02-28)
parents 831230e53067
children
line source
1 /*
2 * r6000_fpu.S: Save/restore floating point context for signal handlers.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 *
8 * Copyright (C) 1996 by Ralf Baechle
9 *
10 * Multi-arch abstraction and asm macros for easier reading:
11 * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
12 */
13 #include <asm/asm.h>
14 #include <asm/fpregdef.h>
15 #include <asm/mipsregs.h>
16 #include <asm/asm-offsets.h>
17 #include <asm/regdef.h>
19 .set noreorder
20 .set mips2
21 /* Save floating point context */
22 LEAF(_save_fp_context)
23 mfc0 t0,CP0_STATUS
24 sll t0,t0,2
25 bgez t0,1f
26 nop
28 cfc1 t1,fcr31
29 /* Store the 16 double precision registers */
30 sdc1 $f0,(SC_FPREGS+0)(a0)
31 sdc1 $f2,(SC_FPREGS+16)(a0)
32 sdc1 $f4,(SC_FPREGS+32)(a0)
33 sdc1 $f6,(SC_FPREGS+48)(a0)
34 sdc1 $f8,(SC_FPREGS+64)(a0)
35 sdc1 $f10,(SC_FPREGS+80)(a0)
36 sdc1 $f12,(SC_FPREGS+96)(a0)
37 sdc1 $f14,(SC_FPREGS+112)(a0)
38 sdc1 $f16,(SC_FPREGS+128)(a0)
39 sdc1 $f18,(SC_FPREGS+144)(a0)
40 sdc1 $f20,(SC_FPREGS+160)(a0)
41 sdc1 $f22,(SC_FPREGS+176)(a0)
42 sdc1 $f24,(SC_FPREGS+192)(a0)
43 sdc1 $f26,(SC_FPREGS+208)(a0)
44 sdc1 $f28,(SC_FPREGS+224)(a0)
45 sdc1 $f30,(SC_FPREGS+240)(a0)
46 jr ra
47 sw t0,SC_FPC_CSR(a0)
48 1: jr ra
49 nop
50 END(_save_fp_context)
52 /* Restore FPU state:
53 * - fp gp registers
54 * - cp1 status/control register
55 *
56 * We base the decision which registers to restore from the signal stack
57 * frame on the current content of c0_status, not on the content of the
58 * stack frame which might have been changed by the user.
59 */
60 LEAF(_restore_fp_context)
61 mfc0 t0,CP0_STATUS
62 sll t0,t0,2
64 bgez t0,1f
65 lw t0,SC_FPC_CSR(a0)
66 /* Restore the 16 double precision registers */
67 ldc1 $f0,(SC_FPREGS+0)(a0)
68 ldc1 $f2,(SC_FPREGS+16)(a0)
69 ldc1 $f4,(SC_FPREGS+32)(a0)
70 ldc1 $f6,(SC_FPREGS+48)(a0)
71 ldc1 $f8,(SC_FPREGS+64)(a0)
72 ldc1 $f10,(SC_FPREGS+80)(a0)
73 ldc1 $f12,(SC_FPREGS+96)(a0)
74 ldc1 $f14,(SC_FPREGS+112)(a0)
75 ldc1 $f16,(SC_FPREGS+128)(a0)
76 ldc1 $f18,(SC_FPREGS+144)(a0)
77 ldc1 $f20,(SC_FPREGS+160)(a0)
78 ldc1 $f22,(SC_FPREGS+176)(a0)
79 ldc1 $f24,(SC_FPREGS+192)(a0)
80 ldc1 $f26,(SC_FPREGS+208)(a0)
81 ldc1 $f28,(SC_FPREGS+224)(a0)
82 ldc1 $f30,(SC_FPREGS+240)(a0)
83 jr ra
84 ctc1 t0,fcr31
85 1: jr ra
86 nop
87 END(_restore_fp_context)