2 * IOP Coprocessor-6 access handler
3 * Copyright (c) 2006, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
16 * Place - Suite 330, Boston, MA 02111-1307 USA.
19 #include <linux/init.h>
20 #include <asm/traps.h>
22 static int cp6_trap(struct pt_regs
*regs
, unsigned int instr
)
26 /* enable cp6 access */
28 "mrc p15, 0, %0, c15, c1, 0\n\t"
29 "orr %0, %0, #(1 << 6)\n\t"
30 "mcr p15, 0, %0, c15, c1, 0\n\t"
36 /* permit kernel space cp6 access
37 * deny user space cp6 access
39 static struct undef_hook cp6_hook
= {
40 .instr_mask
= 0x0f000ff0,
41 .instr_val
= 0x0e000610,
42 .cpsr_mask
= MODE_MASK
,
47 void __init
iop_init_cp6_handler(void)
49 register_undef_hook(&cp6_hook
);
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