mirror of
https://github.com/torvalds/linux.git
synced 2024-12-28 13:51:44 +00:00
Hexagon: Provide basic implementation and/or stubs for I/O routines.
Signed-off-by: Richard Kuo <rkuo@codeaurora.org> Signed-off-by: Linas Vepstas <linas@codeaurora.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Richard Kuo
Linus Torvalds
parent
7567746e1c
commit
013bf24c38
326
arch/hexagon/include/asm/io.h
Normal file
326
arch/hexagon/include/asm/io.h
Normal file
@ -0,0 +1,326 @@
|
||||
/*
|
||||
* IO definitions for the Hexagon architecture
|
||||
*
|
||||
* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 and
|
||||
* only 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., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
* 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#ifndef _ASM_IO_H
|
||||
#define _ASM_IO_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <asm/string.h>
|
||||
#include <asm/mem-layout.h>
|
||||
#include <asm/iomap.h>
|
||||
#include <asm/page.h>
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/tlbflush.h>
|
||||
|
||||
/*
|
||||
* We don't have PCI yet.
|
||||
* _IO_BASE is pointing at what should be unused virtual space.
|
||||
*/
|
||||
#define IO_SPACE_LIMIT 0xffff
|
||||
#define _IO_BASE ((void __iomem *)0xfe000000)
|
||||
|
||||
extern int remap_area_pages(unsigned long start, unsigned long phys_addr,
|
||||
unsigned long end, unsigned long flags);
|
||||
|
||||
extern void __iounmap(const volatile void __iomem *addr);
|
||||
|
||||
/* Defined in lib/io.c, needed for smc91x driver. */
|
||||
extern void __raw_readsw(const void __iomem *addr, void *data, int wordlen);
|
||||
extern void __raw_writesw(void __iomem *addr, const void *data, int wordlen);
|
||||
|
||||
extern void __raw_readsl(const void __iomem *addr, void *data, int wordlen);
|
||||
extern void __raw_writesl(void __iomem *addr, const void *data, int wordlen);
|
||||
|
||||
#define readsw(p, d, l) __raw_readsw(p, d, l)
|
||||
#define writesw(p, d, l) __raw_writesw(p, d, l)
|
||||
|
||||
#define readsl(p, d, l) __raw_readsl(p, d, l)
|
||||
#define writesl(p, d, l) __raw_writesl(p, d, l)
|
||||
|
||||
/*
|
||||
* virt_to_phys - map virtual address to physical
|
||||
* @address: address to map
|
||||
*/
|
||||
static inline unsigned long virt_to_phys(volatile void *address)
|
||||
{
|
||||
return __pa(address);
|
||||
}
|
||||
|
||||
/*
|
||||
* phys_to_virt - map physical address to virtual
|
||||
* @address: address to map
|
||||
*/
|
||||
static inline void *phys_to_virt(unsigned long address)
|
||||
{
|
||||
return __va(address);
|
||||
}
|
||||
|
||||
/*
|
||||
* convert a physical pointer to a virtual kernel pointer for
|
||||
* /dev/mem access.
|
||||
*/
|
||||
#define xlate_dev_kmem_ptr(p) __va(p)
|
||||
#define xlate_dev_mem_ptr(p) __va(p)
|
||||
|
||||
/*
|
||||
* IO port access primitives. Hexagon doesn't have special IO access
|
||||
* instructions; all I/O is memory mapped.
|
||||
*
|
||||
* in/out are used for "ports", but we don't have "port instructions",
|
||||
* so these are really just memory mapped too.
|
||||
*/
|
||||
|
||||
/*
|
||||
* readb - read byte from memory mapped device
|
||||
* @addr: pointer to memory
|
||||
*
|
||||
* Operates on "I/O bus memory space"
|
||||
*/
|
||||
static inline u8 readb(const volatile void __iomem *addr)
|
||||
{
|
||||
u8 val;
|
||||
asm volatile(
|
||||
"%0 = memb(%1);"
|
||||
: "=&r" (val)
|
||||
: "r" (addr)
|
||||
);
|
||||
return val;
|
||||
}
|
||||
|
||||
static inline u16 readw(const volatile void __iomem *addr)
|
||||
{
|
||||
u16 val;
|
||||
asm volatile(
|
||||
"%0 = memh(%1);"
|
||||
: "=&r" (val)
|
||||
: "r" (addr)
|
||||
);
|
||||
return val;
|
||||
}
|
||||
|
||||
static inline u32 readl(const volatile void __iomem *addr)
|
||||
{
|
||||
u32 val;
|
||||
asm volatile(
|
||||
"%0 = memw(%1);"
|
||||
: "=&r" (val)
|
||||
: "r" (addr)
|
||||
);
|
||||
return val;
|
||||
}
|
||||
|
||||
/*
|
||||
* writeb - write a byte to a memory location
|
||||
* @data: data to write to
|
||||
* @addr: pointer to memory
|
||||
*
|
||||
*/
|
||||
static inline void writeb(u8 data, volatile void __iomem *addr)
|
||||
{
|
||||
asm volatile(
|
||||
"memb(%0) = %1;"
|
||||
:
|
||||
: "r" (addr), "r" (data)
|
||||
: "memory"
|
||||
);
|
||||
}
|
||||
|
||||
static inline void writew(u16 data, volatile void __iomem *addr)
|
||||
{
|
||||
asm volatile(
|
||||
"memh(%0) = %1;"
|
||||
:
|
||||
: "r" (addr), "r" (data)
|
||||
: "memory"
|
||||
);
|
||||
|
||||
}
|
||||
|
||||
static inline void writel(u32 data, volatile void __iomem *addr)
|
||||
{
|
||||
asm volatile(
|
||||
"memw(%0) = %1;"
|
||||
:
|
||||
: "r" (addr), "r" (data)
|
||||
: "memory"
|
||||
);
|
||||
}
|
||||
|
||||
#define __raw_writeb writeb
|
||||
#define __raw_writew writew
|
||||
#define __raw_writel writel
|
||||
|
||||
#define __raw_readb readb
|
||||
#define __raw_readw readw
|
||||
#define __raw_readl readl
|
||||
|
||||
/*
|
||||
* Need an mtype somewhere in here, for cache type deals?
|
||||
* This is probably too long for an inline.
|
||||
*/
|
||||
void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size);
|
||||
|
||||
static inline void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
|
||||
{
|
||||
return ioremap_nocache(phys_addr, size);
|
||||
}
|
||||
|
||||
static inline void iounmap(volatile void __iomem *addr)
|
||||
{
|
||||
__iounmap(addr);
|
||||
}
|
||||
|
||||
#define __raw_writel writel
|
||||
|
||||
static inline void memcpy_fromio(void *dst, const volatile void __iomem *src,
|
||||
int count)
|
||||
{
|
||||
memcpy(dst, (void *) src, count);
|
||||
}
|
||||
|
||||
static inline void memcpy_toio(volatile void __iomem *dst, const void *src,
|
||||
int count)
|
||||
{
|
||||
memcpy((void *) dst, src, count);
|
||||
}
|
||||
|
||||
#define PCI_IO_ADDR (volatile void __iomem *)
|
||||
|
||||
/*
|
||||
* inb - read byte from I/O port or something
|
||||
* @port: address in I/O space
|
||||
*
|
||||
* Operates on "I/O bus I/O space"
|
||||
*/
|
||||
static inline u8 inb(unsigned long port)
|
||||
{
|
||||
return readb(_IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
static inline u16 inw(unsigned long port)
|
||||
{
|
||||
return readw(_IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
static inline u32 inl(unsigned long port)
|
||||
{
|
||||
return readl(_IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
/*
|
||||
* outb - write a byte to a memory location
|
||||
* @data: data to write to
|
||||
* @addr: address in I/O space
|
||||
*/
|
||||
static inline void outb(u8 data, unsigned long port)
|
||||
{
|
||||
writeb(data, _IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
static inline void outw(u16 data, unsigned long port)
|
||||
{
|
||||
writew(data, _IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
static inline void outl(u32 data, unsigned long port)
|
||||
{
|
||||
writel(data, _IO_BASE + (port & IO_SPACE_LIMIT));
|
||||
}
|
||||
|
||||
#define outb_p outb
|
||||
#define outw_p outw
|
||||
#define outl_p outl
|
||||
|
||||
#define inb_p inb
|
||||
#define inw_p inw
|
||||
#define inl_p inl
|
||||
|
||||
static inline void insb(unsigned long port, void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
u8 *buf = buffer;
|
||||
do {
|
||||
u8 x = inb(port);
|
||||
*buf++ = x;
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void insw(unsigned long port, void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
u16 *buf = buffer;
|
||||
do {
|
||||
u16 x = inw(port);
|
||||
*buf++ = x;
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void insl(unsigned long port, void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
u32 *buf = buffer;
|
||||
do {
|
||||
u32 x = inw(port);
|
||||
*buf++ = x;
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void outsb(unsigned long port, const void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
const u8 *buf = buffer;
|
||||
do {
|
||||
outb(*buf++, port);
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void outsw(unsigned long port, const void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
const u16 *buf = buffer;
|
||||
do {
|
||||
outw(*buf++, port);
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void outsl(unsigned long port, const void *buffer, int count)
|
||||
{
|
||||
if (count) {
|
||||
const u32 *buf = buffer;
|
||||
do {
|
||||
outl(*buf++, port);
|
||||
} while (--count);
|
||||
}
|
||||
}
|
||||
|
||||
#define flush_write_buffers() do { } while (0)
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#endif
|
||||
91
arch/hexagon/lib/io.c
Normal file
91
arch/hexagon/lib/io.c
Normal file
@ -0,0 +1,91 @@
|
||||
/*
|
||||
* I/O access functions for Hexagon
|
||||
*
|
||||
* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 and
|
||||
* only 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., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
* 02110-1301, USA.
|
||||
*/
|
||||
|
||||
#include <asm/io.h>
|
||||
|
||||
/* These are all FIFO routines! */
|
||||
|
||||
/*
|
||||
* __raw_readsw - read words a short at a time
|
||||
* @addr: source address
|
||||
* @data: data address
|
||||
* @len: number of shorts to read
|
||||
*/
|
||||
void __raw_readsw(const void __iomem *addr, void *data, int len)
|
||||
{
|
||||
const volatile short int *src = (short int *) addr;
|
||||
short int *dst = (short int *) data;
|
||||
|
||||
if ((u32)data & 0x1)
|
||||
panic("unaligned pointer to readsw");
|
||||
|
||||
while (len-- > 0)
|
||||
*dst++ = *src;
|
||||
|
||||
}
|
||||
|
||||
/*
|
||||
* __raw_writesw - read words a short at a time
|
||||
* @addr: source address
|
||||
* @data: data address
|
||||
* @len: number of shorts to read
|
||||
*/
|
||||
void __raw_writesw(void __iomem *addr, const void *data, int len)
|
||||
{
|
||||
const short int *src = (short int *)data;
|
||||
volatile short int *dst = (short int *)addr;
|
||||
|
||||
if ((u32)data & 0x1)
|
||||
panic("unaligned pointer to writesw");
|
||||
|
||||
while (len-- > 0)
|
||||
*dst = *src++;
|
||||
|
||||
|
||||
}
|
||||
|
||||
/* Pretty sure len is pre-adjusted for the length of the access already */
|
||||
void __raw_readsl(const void __iomem *addr, void *data, int len)
|
||||
{
|
||||
const volatile long *src = (long *) addr;
|
||||
long *dst = (long *) data;
|
||||
|
||||
if ((u32)data & 0x3)
|
||||
panic("unaligned pointer to readsl");
|
||||
|
||||
while (len-- > 0)
|
||||
*dst++ = *src;
|
||||
|
||||
|
||||
}
|
||||
|
||||
void __raw_writesl(void __iomem *addr, const void *data, int len)
|
||||
{
|
||||
const long *src = (long *)data;
|
||||
volatile long *dst = (long *)addr;
|
||||
|
||||
if ((u32)data & 0x3)
|
||||
panic("unaligned pointer to writesl");
|
||||
|
||||
while (len-- > 0)
|
||||
*dst = *src++;
|
||||
|
||||
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user