You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
203 lines
3.0 KiB
203 lines
3.0 KiB
/*
|
|
* This file contains miscellaneous low-level functions.
|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
|
*
|
|
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
|
|
* and Paul Mackerras.
|
|
*
|
|
* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
|
|
* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <asm/ppc_asm.h>
|
|
|
|
.text
|
|
|
|
#ifdef CONFIG_PPC64
|
|
#define IN_SYNC twi 0,r5,0; isync
|
|
#define EIEIO_32
|
|
#define SYNC_64 sync
|
|
#else /* CONFIG_PPC32 */
|
|
#define IN_SYNC
|
|
#define EIEIO_32 eieio
|
|
#define SYNC_64
|
|
#endif
|
|
/*
|
|
* Returns (address we are running at) - (address we were linked at)
|
|
* for use before the text and data are mapped to KERNELBASE.
|
|
*/
|
|
|
|
_GLOBAL(reloc_offset)
|
|
mflr r0
|
|
bl 1f
|
|
1: mflr r3
|
|
LOAD_REG_IMMEDIATE(r4,1b)
|
|
subf r3,r4,r3
|
|
mtlr r0
|
|
blr
|
|
|
|
/*
|
|
* add_reloc_offset(x) returns x + reloc_offset().
|
|
*/
|
|
_GLOBAL(add_reloc_offset)
|
|
mflr r0
|
|
bl 1f
|
|
1: mflr r5
|
|
LOAD_REG_IMMEDIATE(r4,1b)
|
|
subf r5,r4,r5
|
|
add r3,r3,r5
|
|
mtlr r0
|
|
blr
|
|
|
|
/*
|
|
* I/O string operations
|
|
*
|
|
* insb(port, buf, len)
|
|
* outsb(port, buf, len)
|
|
* insw(port, buf, len)
|
|
* outsw(port, buf, len)
|
|
* insl(port, buf, len)
|
|
* outsl(port, buf, len)
|
|
* insw_ns(port, buf, len)
|
|
* outsw_ns(port, buf, len)
|
|
* insl_ns(port, buf, len)
|
|
* outsl_ns(port, buf, len)
|
|
*
|
|
* The *_ns versions don't do byte-swapping.
|
|
*/
|
|
_GLOBAL(_insb)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,1
|
|
blelr-
|
|
00: lbz r5,0(r3)
|
|
eieio
|
|
stbu r5,1(r4)
|
|
bdnz 00b
|
|
IN_SYNC
|
|
blr
|
|
|
|
_GLOBAL(_outsb)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,1
|
|
blelr-
|
|
00: lbzu r5,1(r4)
|
|
stb r5,0(r3)
|
|
EIEIO_32
|
|
bdnz 00b
|
|
SYNC_64
|
|
blr
|
|
|
|
_GLOBAL(_insw)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,2
|
|
blelr-
|
|
00: lhbrx r5,0,r3
|
|
eieio
|
|
sthu r5,2(r4)
|
|
bdnz 00b
|
|
IN_SYNC
|
|
blr
|
|
|
|
_GLOBAL(_outsw)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,2
|
|
blelr-
|
|
00: lhzu r5,2(r4)
|
|
EIEIO_32
|
|
sthbrx r5,0,r3
|
|
bdnz 00b
|
|
SYNC_64
|
|
blr
|
|
|
|
_GLOBAL(_insl)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,4
|
|
blelr-
|
|
00: lwbrx r5,0,r3
|
|
eieio
|
|
stwu r5,4(r4)
|
|
bdnz 00b
|
|
IN_SYNC
|
|
blr
|
|
|
|
_GLOBAL(_outsl)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,4
|
|
blelr-
|
|
00: lwzu r5,4(r4)
|
|
stwbrx r5,0,r3
|
|
EIEIO_32
|
|
bdnz 00b
|
|
SYNC_64
|
|
blr
|
|
|
|
#ifdef CONFIG_PPC32
|
|
_GLOBAL(__ide_mm_insw)
|
|
#endif
|
|
_GLOBAL(_insw_ns)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,2
|
|
blelr-
|
|
00: lhz r5,0(r3)
|
|
eieio
|
|
sthu r5,2(r4)
|
|
bdnz 00b
|
|
IN_SYNC
|
|
blr
|
|
|
|
#ifdef CONFIG_PPC32
|
|
_GLOBAL(__ide_mm_outsw)
|
|
#endif
|
|
_GLOBAL(_outsw_ns)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,2
|
|
blelr-
|
|
00: lhzu r5,2(r4)
|
|
sth r5,0(r3)
|
|
EIEIO_32
|
|
bdnz 00b
|
|
SYNC_64
|
|
blr
|
|
|
|
#ifdef CONFIG_PPC32
|
|
_GLOBAL(__ide_mm_insl)
|
|
#endif
|
|
_GLOBAL(_insl_ns)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,4
|
|
blelr-
|
|
00: lwz r5,0(r3)
|
|
eieio
|
|
stwu r5,4(r4)
|
|
bdnz 00b
|
|
IN_SYNC
|
|
blr
|
|
|
|
#ifdef CONFIG_PPC32
|
|
_GLOBAL(__ide_mm_outsl)
|
|
#endif
|
|
_GLOBAL(_outsl_ns)
|
|
cmpwi 0,r5,0
|
|
mtctr r5
|
|
subi r4,r4,4
|
|
blelr-
|
|
00: lwzu r5,4(r4)
|
|
stw r5,0(r3)
|
|
EIEIO_32
|
|
bdnz 00b
|
|
SYNC_64
|
|
blr
|
|
|
|
|