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/arch/arm/mach-iop13xx/include/mach/entry-macro.S

https://github.com/AICP/kernel_google_msm
Assembly | 42 lines | 40 code | 2 blank | 0 comment | 2 complexity | 9167b48c9ef941e12937272f9047b160 MD5 | raw file
 1/*
 2 * iop13xx low level irq macros
 3 * Copyright (c) 2005-2006, Intel Corporation.
 4 *
 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.
 8 *
 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
12 * more details.
13 *
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.
17 *
18 */
19	.macro get_irqnr_preamble, base, tmp
20	mrc	p15, 0, \tmp, c15, c1, 0
21	orr	\tmp, \tmp, #(1 << 6)
22	mcr	p15, 0, \tmp, c15, c1, 0	@ Enable cp6 access
23	.endm
24
25	/*
26	 * Note: a 1-cycle window exists where iintvec will return the value
27	 * of iintbase, so we explicitly check for "bad zeros"
28	 */
29	.macro  get_irqnr_and_base, irqnr, irqstat, base, tmp
30	mrc	p6, 0, \irqnr, c3, c2, 0  	@ Read IINTVEC
31	cmp	\irqnr, #0
32	mrceq	p6, 0, \irqnr, c3, c2, 0  	@ Re-read on potentially bad zero
33	adds	\irqstat, \irqnr, #1	  	@ Check for 0xffffffff
34	movne	\irqnr, \irqnr, lsr #2	  	@ Convert to irqnr
35	.endm
36
37	.macro arch_ret_to_user, tmp1, tmp2
38	mrc	p15, 0, \tmp1, c15, c1, 0
39	ands	\tmp2, \tmp1, #(1 << 6)
40	bicne	\tmp1, \tmp1, #(1 << 6)
41	mcrne	p15, 0, \tmp1, c15, c1, 0	@ Disable cp6 access
42	.endm