https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: a49f0d1ea3ec94fc7cf33a7c36a16343b74bd565 authored by Linus Torvalds on 22 December 2012, 01:19:00 UTC
Linux 3.8-rc1
Linux 3.8-rc1
Tip revision: a49f0d1
cp6.c
/*
* IOP Coprocessor-6 access handler
* Copyright (c) 2006, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
*
*/
#include <linux/init.h>
#include <asm/traps.h>
#include <asm/ptrace.h>
static int cp6_trap(struct pt_regs *regs, unsigned int instr)
{
u32 temp;
/* enable cp6 access */
asm volatile (
"mrc p15, 0, %0, c15, c1, 0\n\t"
"orr %0, %0, #(1 << 6)\n\t"
"mcr p15, 0, %0, c15, c1, 0\n\t"
: "=r"(temp));
return 0;
}
/* permit kernel space cp6 access
* deny user space cp6 access
*/
static struct undef_hook cp6_hook = {
.instr_mask = 0x0f000ff0,
.instr_val = 0x0e000610,
.cpsr_mask = MODE_MASK,
.cpsr_val = SVC_MODE,
.fn = cp6_trap,
};
void __init iop_init_cp6_handler(void)
{
register_undef_hook(&cp6_hook);
}