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Commit 5adcaf50 authored by Stephen Rothwell's avatar Stephen Rothwell
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[POWERPC] convert string i/o operations to C 

This produces essentially the same code and will make the iSeries i/o
consolidation easier.

The count parameter is changed to long since that will produce the same
(better) code on 32 and 64 bit builds.
Signed-off-by: default avatarStephen Rothwell <sfr@canb.auug.org.au>
parent 73ea9e1b
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Inline Side-by-side
Showing with 130 additions and 115 deletions
arch/powerpc/kernel/Makefile
View file @ 5adcaf50
......@@ -51,7 +51,7 @@ extra-$(CONFIG_8xx) := head_8xx.o
extra-y += vmlinux.lds
obj-y += time.o prom.o traps.o setup-common.o \
udbg.o misc.o
udbg.o misc.o io.o
obj-$(CONFIG_PPC32) += entry_32.o setup_32.o misc_32.o
obj-$(CONFIG_PPC64) += misc_64.o dma_64.o iommu.o
obj-$(CONFIG_PPC_MULTIPLATFORM) += prom_init.o
......
arch/powerpc/kernel/io.c 0 → 100644
View file @ 5adcaf50
/*
* I/O string operations
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
* Copyright (C) 2006 IBM Corporation
*
* 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)
*
* Rewritten in C by Stephen Rothwell.
*
* 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 <linux/kernel.h>
#include <linux/types.h>
#include <linux/compiler.h>
#include <linux/module.h>
#include <asm/io.h>
void _insb(volatile u8 __iomem *port, void *buf, long count)
{
u8 *tbuf = buf;
u8 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insb);
void _outsb(volatile u8 __iomem *port, const void *buf, long count)
{
const u8 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsb);
void _insw_ns(volatile u16 __iomem *port, void *buf, long count)
{
u16 *tbuf = buf;
u16 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insw_ns);
void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count)
{
const u16 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsw_ns);
void _insl_ns(volatile u32 __iomem *port, void *buf, long count)
{
u32 *tbuf = buf;
u32 tmp;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
tmp = *port;
asm volatile("eieio");
*tbuf++ = tmp;
} while (--count != 0);
asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
}
EXPORT_SYMBOL(_insl_ns);
void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count)
{
const u32 *tbuf = buf;
if (unlikely(count <= 0))
return;
asm volatile("sync");
do {
*port = *tbuf++;
} while (--count != 0);
asm volatile("sync");
}
EXPORT_SYMBOL(_outsl_ns);
arch/powerpc/kernel/misc.S
View file @ 5adcaf50
......@@ -43,98 +43,3 @@ _GLOBAL(add_reloc_offset)
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)
sync
cmpwi 0,r5,0
mtctr r5
subi r4,r4,1
blelr-
00: lbz r5,0(r3)
eieio
stbu r5,1(r4)
bdnz 00b
twi 0,r5,0
isync
blr
_GLOBAL(_outsb)
cmpwi 0,r5,0
mtctr r5
subi r4,r4,1
blelr-
sync
00: lbzu r5,1(r4)
stb r5,0(r3)
bdnz 00b
sync
blr
_GLOBAL(_insw_ns)
sync
cmpwi 0,r5,0
mtctr r5
subi r4,r4,2
blelr-
00: lhz r5,0(r3)
eieio
sthu r5,2(r4)
bdnz 00b
twi 0,r5,0
isync
blr
_GLOBAL(_outsw_ns)
cmpwi 0,r5,0
mtctr r5
subi r4,r4,2
blelr-
sync
00: lhzu r5,2(r4)
sth r5,0(r3)
bdnz 00b
sync
blr
_GLOBAL(_insl_ns)
sync
cmpwi 0,r5,0
mtctr r5
subi r4,r4,4
blelr-
00: lwz r5,0(r3)
eieio
stwu r5,4(r4)
bdnz 00b
twi 0,r5,0
isync
blr
_GLOBAL(_outsl_ns)
cmpwi 0,r5,0
mtctr r5
subi r4,r4,4
blelr-
sync
00: lwzu r5,4(r4)
stw r5,0(r3)
bdnz 00b
sync
blr
arch/powerpc/kernel/ppc_ksyms.c
View file @ 5adcaf50
......@@ -95,13 +95,6 @@ EXPORT_SYMBOL(__strnlen_user);
EXPORT_SYMBOL(copy_4K_page);
#endif
EXPORT_SYMBOL(_insb);
EXPORT_SYMBOL(_outsb);
EXPORT_SYMBOL(_insw_ns);
EXPORT_SYMBOL(_outsw_ns);
EXPORT_SYMBOL(_insl_ns);
EXPORT_SYMBOL(_outsl_ns);
#if defined(CONFIG_PPC32) && (defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE))
EXPORT_SYMBOL(ppc_ide_md);
#endif
......
include/asm-powerpc/io.h
View file @ 5adcaf50
......@@ -143,12 +143,12 @@ static inline void __raw_writeq(unsigned long v, volatile void __iomem *addr)
#define readl_relaxed(addr) readl(addr)
#define readq_relaxed(addr) readq(addr)
extern void _insb(volatile u8 __iomem *port, void *buf, int ns);
extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns);
extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns);
extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns);
extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl);
extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, int nl);
extern void _insb(volatile u8 __iomem *port, void *buf, long count);
extern void _outsb(volatile u8 __iomem *port, const void *buf, long count);
extern void _insw_ns(volatile u16 __iomem *port, void *buf, long count);
extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count);
extern void _insl_ns(volatile u32 __iomem *port, void *buf, long count);
extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
static inline void mmiowb(void)
{
......
include/asm-ppc/io.h
View file @ 5adcaf50
......@@ -327,12 +327,12 @@ __do_out_asm(outl, "stwbrx")
#define inl_p(port) inl((port))
#define outl_p(val, port) outl((val), (port))
extern void _insb(volatile u8 __iomem *port, void *buf, int ns);
extern void _outsb(volatile u8 __iomem *port, const void *buf, int ns);
extern void _insw_ns(volatile u16 __iomem *port, void *buf, int ns);
extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, int ns);
extern void _insl_ns(volatile u32 __iomem *port, void *buf, int nl);
extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, int nl);
extern void _insb(volatile u8 __iomem *port, void *buf, long count);
extern void _outsb(volatile u8 __iomem *port, const void *buf, long count);
extern void _insw_ns(volatile u16 __iomem *port, void *buf, long count);
extern void _outsw_ns(volatile u16 __iomem *port, const void *buf, long count);
extern void _insl_ns(volatile u32 __iomem *port, void *buf, long count);
extern void _outsl_ns(volatile u32 __iomem *port, const void *buf, long count);
#define IO_SPACE_LIMIT ~0
......
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