u-boot/arch/m68k/include/asm/io.h
Jason Jin 6752da6b26 ColdFire:Add mb for 5253 dram initialization
The dram initialization sequence should be in order.
This patch add mb for the dram intialization code to make
sure the compiler do not disorder the code.

Signed-off-by: Jason Jin <Jason.jin@freescale.com>
2011-09-04 22:46:55 +08:00

265 lines
6.8 KiB
C

/*
* IO header file
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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.
*
* 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
*/
#ifndef __ASM_M68K_IO_H__
#define __ASM_M68K_IO_H__
#include <asm/byteorder.h>
#ifndef _IO_BASE
#define _IO_BASE 0
#endif
#define __raw_readb(addr) (*(volatile u8 *)(addr))
#define __raw_readw(addr) (*(volatile u16 *)(addr))
#define __raw_readl(addr) (*(volatile u32 *)(addr))
#define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
#define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
#define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
#define readb(addr) in_8((volatile u8 *)(addr))
#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
#if !defined(__BIG_ENDIAN)
#define readw(addr) (*(volatile u16 *) (addr))
#define readl(addr) (*(volatile u32 *) (addr))
#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
#else
#define readw(addr) in_le16((volatile u16 *)(addr))
#define readl(addr) in_le32((volatile u32 *)(addr))
#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
#endif
/*
* The insw/outsw/insl/outsl macros don't do byte-swapping.
* They are only used in practice for transferring buffers which
* are arrays of bytes, and byte-swapping is not appropriate in
* that case. - paulus
*/
#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define inb(port) in_8((u8 *)((port)+_IO_BASE))
#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
#if !defined(__BIG_ENDIAN)
#define inw(port) in_be16((u16 *)((port)+_IO_BASE))
#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
#define inl(port) in_be32((u32 *)((port)+_IO_BASE))
#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
#else
#define inw(port) in_le16((u16 *)((port)+_IO_BASE))
#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
#define inl(port) in_le32((u32 *)((port)+_IO_BASE))
#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
#endif
#define mb() __asm__ __volatile__ ("" : : : "memory")
extern inline void _insb(volatile u8 * port, void *buf, int ns)
{
u8 *data = (u8 *) buf;
while (ns--)
*data++ = *port;
}
extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
{
u8 *data = (u8 *) buf;
while (ns--)
*port = *data++;
}
extern inline void _insw(volatile u16 * port, void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--)
*data++ = __sw16(*port);
}
extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--) {
*port = __sw16(*data);
data++;
}
}
extern inline void _insl(volatile u32 * port, void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--)
*data++ = __sw32(*port);
}
extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--) {
*port = __sw32(*data);
data++;
}
}
extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--)
*data++ = *port;
}
extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--) {
*port = *data++;
}
}
extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--)
*data++ = *port;
}
extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--) {
*port = *data;
data++;
}
}
/*
* The *_ns versions below don't do byte-swapping.
* Neither do the standard versions now, these are just here
* for older code.
*/
#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define IO_SPACE_LIMIT ~0
/*
* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
*/
extern inline int in_8(volatile u8 * addr)
{
return (int)*addr;
}
extern inline void out_8(volatile u8 * addr, int val)
{
*addr = (u8) val;
}
extern inline int in_le16(volatile u16 * addr)
{
return __sw16(*addr);
}
extern inline int in_be16(volatile u16 * addr)
{
return (*addr & 0xFFFF);
}
extern inline void out_le16(volatile u16 * addr, int val)
{
*addr = __sw16(val);
}
extern inline void out_be16(volatile u16 * addr, int val)
{
*addr = (u16) val;
}
extern inline unsigned in_le32(volatile u32 * addr)
{
return __sw32(*addr);
}
extern inline unsigned in_be32(volatile u32 * addr)
{
return (*addr);
}
extern inline void out_le32(volatile unsigned *addr, int val)
{
*addr = __sw32(val);
}
extern inline void out_be32(volatile unsigned *addr, int val)
{
*addr = val;
}
static inline void sync(void)
{
/* This sync function is for PowerPC or other architecture instruction
* ColdFire does not have this instruction. Dummy function, added for
* compatibility (CFI driver)
*/
}
/*
* Given a physical address and a length, return a virtual address
* that can be used to access the memory range with the caching
* properties specified by "flags".
*/
#define MAP_NOCACHE (0)
#define MAP_WRCOMBINE (0)
#define MAP_WRBACK (0)
#define MAP_WRTHROUGH (0)
static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
unsigned long flags)
{
return (void *)paddr;
}
/*
* Take down a mapping set up by map_physmem().
*/
static inline void unmap_physmem(void *vaddr, unsigned long flags)
{
}
static inline phys_addr_t virt_to_phys(void * vaddr)
{
return (phys_addr_t)(vaddr);
}
#endif /* __ASM_M68K_IO_H__ */