1 // SPDX-License-Identifier: GPL-2.0-only
3 * IOP Coprocessor-6 access handler
4 * Copyright (c) 2006, Intel Corporation.
6 #include <linux/init.h>
8 #include <asm/ptrace.h>
10 void iop_enable_cp6(void)
14 /* enable cp6 access */
16 "mrc p15, 0, %0, c15, c1, 0\n\t"
17 "orr %0, %0, #(1 << 6)\n\t"
18 "mcr p15, 0, %0, c15, c1, 0\n\t"
19 "mrc p15, 0, %0, c15, c1, 0\n\t"
21 "sub pc, pc, #4 @ cp_wait\n\t"
25 static int cp6_trap(struct pt_regs *regs, unsigned int instr)
32 /* permit kernel space cp6 access
33 * deny user space cp6 access
35 static struct undef_hook cp6_hook = {
36 .instr_mask = 0x0f000ff0,
37 .instr_val = 0x0e000610,
38 .cpsr_mask = MODE_MASK,
43 void __init iop_init_cp6_handler(void)
45 register_undef_hook(&cp6_hook);