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/*
* U-boot - io-kernel.h
*
* Copyright (c) 2005 blackfin.uclinux.org
*
* (C) Copyright 2000-2004
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* 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 _BLACKFIN_IO_H
#define _BLACKFIN_IO_H
#ifdef __KERNEL__
#include <linux/config.h>
/*
* These are for ISA/PCI shared memory _only_ and should never be used
* on any other type of memory, including Zorro memory. They are meant to
* access the bus in the bus byte order which is little-endian!.
*
* readX/writeX() are used to access memory mapped devices. On some
* architectures the memory mapped IO stuff needs to be accessed
* differently. On the m68k architecture, we just read/write the
* memory location directly.
*/
/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
* two accesses to memory, which may be undesireable for some devices.
*/
#define readb(addr) ({ unsigned char __v = (*(volatile unsigned char *) (addr));asm("ssync;"); __v; })
#define readw(addr) ({ unsigned short __v = (*(volatile unsigned short *) (addr)); asm("ssync;");__v; })
#define readl(addr) ({ unsigned int __v = (*(volatile unsigned int *) (addr));asm("ssync;"); __v; })
#define writeb(b,addr) (void)((*(volatile unsigned char *) (addr)) = (b))
#define writew(b,addr) (void)((*(volatile unsigned short *) (addr)) = (b))
#define writel(b,addr) (void)((*(volatile unsigned int *) (addr)) = (b))
#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#define __raw_writeb writeb
#define __raw_writew writew
#define __raw_writel writel
#define memset_io(a,b,c) memset((void *)(a),(b),(c))
#define memcpy_fromio(a,b,c) memcpy((a),(void *)(b),(c))
#define memcpy_toio(a,b,c) memcpy((void *)(a),(b),(c))
#define inb(addr) cf_inb((volatile unsigned char*)(addr))
#define inw(addr) readw(addr)
#define inl(addr) readl(addr)
#define outb(x,addr) cf_outb((unsigned char)(x), (volatile unsigned char*)(addr))
#define outw(x,addr) ((void) writew(x,addr))
#define outl(x,addr) ((void) writel(x,addr))
#define inb_p(addr) inb(addr)
#define inw_p(addr) inw(addr)
#define inl_p(addr) inl(addr)
#define outb_p(x,addr) outb(x,addr)
#define outw_p(x,addr) outw(x,addr)
#define outl_p(x,addr) outl(x,addr)
#define insb(port, addr, count) memcpy((void*)addr, (void*)port, count)
#define insw(port, addr, count) cf_insw((unsigned short*)addr, (unsigned short*)(port), (count))
#define insl(port, addr, count) memcpy((void*)addr, (void*)port, (4*count))
#define outsb(port, addr, count) memcpy((void*)port, (void*)addr, count)
#define outsw(port,addr,count) cf_outsw((unsigned short*)(port), (unsigned short*)addr, (count))
#define outsl(port, addr, count) memcpy((void*)port, (void*)addr, (4*count))
#define IO_SPACE_LIMIT 0xffff
/* Values for nocacheflag and cmode */
#define IOMAP_FULL_CACHING 0
#define IOMAP_NOCACHE_SER 1
#define IOMAP_NOCACHE_NONSER 2
#define IOMAP_WRITETHROUGH 3
#ifndef __ASSEMBLY__
extern void *__ioremap(unsigned long physaddr, unsigned long size,
int cacheflag);
extern void __iounmap(void *addr, unsigned long size);
extern inline void *ioremap(unsigned long physaddr, unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
extern inline void *ioremap_nocache(unsigned long physaddr, unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_NOCACHE_SER);
}
extern inline void *ioremap_writethrough(unsigned long physaddr,
unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_WRITETHROUGH);
}
extern inline void *ioremap_fullcache(unsigned long physaddr,
unsigned long size)
{
return __ioremap(physaddr, size, IOMAP_FULL_CACHING);
}
extern void iounmap(void *addr);
/* Nothing to do */
extern void blkfin_inv_cache_all(void);
#endif
#define dma_cache_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
#define dma_cache_wback(_start,_size) do { } while (0)
#define dma_cache_wback_inv(_start,_size) do { blkfin_inv_cache_all();} while (0)
/* Pages to physical address... */
#define page_to_phys(page) ((page - mem_map) << PAGE_SHIFT)
#define page_to_bus(page) ((page - mem_map) << PAGE_SHIFT)
#define mm_ptov(vaddr) ((void *) (vaddr))
#define mm_vtop(vaddr) ((unsigned long) (vaddr))
#define phys_to_virt(vaddr) ((void *) (vaddr))
#define virt_to_phys(vaddr) ((unsigned long) (vaddr))
#define virt_to_bus virt_to_phys
#define bus_to_virt phys_to_virt
#endif
#endif
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