mirror of
https://github.com/torvalds/linux.git
synced 2024-12-14 07:02:23 +00:00
b1576fec7f
binutils is smart enough to know that a branch to a function descriptor is actually a branch to the functions text address. Alan tells me that binutils has been doing this for 9 years. Signed-off-by: Anton Blanchard <anton@samba.org>
90 lines
1.8 KiB
ArmAsm
90 lines
1.8 KiB
ArmAsm
/*
|
|
* Copyright (C) 2006-2007 PA Semi, Inc
|
|
*
|
|
* Maintained by: Olof Johansson <olof@lixom.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that 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 <asm/processor.h>
|
|
#include <asm/page.h>
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/cputable.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
/* Power savings opcodes since not all binutils have them at this time */
|
|
#define DOZE .long 0x4c000324
|
|
#define NAP .long 0x4c000364
|
|
#define SLEEP .long 0x4c0003a4
|
|
#define RVW .long 0x4c0003e4
|
|
|
|
/* Common sequence to do before going to any of the
|
|
* powersavings modes.
|
|
*/
|
|
|
|
#define PRE_SLEEP_SEQUENCE \
|
|
std r3,8(r1); \
|
|
ptesync ; \
|
|
ld r3,8(r1); \
|
|
1: cmpd r3,r3; \
|
|
bne 1b
|
|
|
|
_doze:
|
|
PRE_SLEEP_SEQUENCE
|
|
DOZE
|
|
b .
|
|
|
|
|
|
_GLOBAL(idle_spin)
|
|
blr
|
|
|
|
_GLOBAL(idle_doze)
|
|
LOAD_REG_ADDR(r3, _doze)
|
|
b sleep_common
|
|
|
|
/* Add more modes here later */
|
|
|
|
sleep_common:
|
|
mflr r0
|
|
std r0, 16(r1)
|
|
stdu r1,-64(r1)
|
|
#ifdef CONFIG_PPC_PASEMI_CPUFREQ
|
|
std r3, 48(r1)
|
|
|
|
/* Only do power savings when in astate 0 */
|
|
bl check_astate
|
|
cmpwi r3,0
|
|
bne 1f
|
|
|
|
ld r3, 48(r1)
|
|
#endif
|
|
LOAD_REG_IMMEDIATE(r6,MSR_DR|MSR_IR|MSR_ME|MSR_EE)
|
|
mfmsr r4
|
|
andc r5,r4,r6
|
|
mtmsrd r5,0
|
|
|
|
mtctr r3
|
|
bctrl
|
|
|
|
mtmsrd r4,0
|
|
|
|
1: addi r1,r1,64
|
|
ld r0,16(r1)
|
|
mtlr r0
|
|
blr
|
|
|