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/*
* U-boot - io.h IO routines
*
* Copyright (c) 2005-2007 Analog Devices Inc.
*
* 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., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#ifndef _BLACKFIN_IO_H
#define _BLACKFIN_IO_H
#ifdef __KERNEL__
#include <asm/blackfin.h>
static inline void sync(void)
{
SSYNC();
}
/*
* 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);
}
/*
* 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.
*/
#ifndef __ASSEMBLY__
static inline unsigned char readb(const volatile void *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ ("cli %1;\n\t"
"NOP; NOP; SSYNC;\n\t"
"%0 = b [%2] (z);\n\t"
"sti %1;\n\t"
: "=d"(val), "=d"(tmp): "a"(addr));
return (unsigned char) val;
}
static inline unsigned short readw(const volatile void *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ ("cli %1;\n\t"
"NOP; NOP; SSYNC;\n\t"
"%0 = w [%2] (z);\n\t"
"sti %1;\n\t"
: "=d"(val), "=d"(tmp): "a"(addr));
return (unsigned short) val;
}
static inline unsigned int readl(const volatile void *addr)
{
unsigned int val;
int tmp;
__asm__ __volatile__ ("cli %1;\n\t"
"NOP; NOP; SSYNC;\n\t"
"%0 = [%2];\n\t"
"sti %1;\n\t"
: "=d"(val), "=d"(tmp): "a"(addr));
return val;
}
#define __raw_readb readb
#define __raw_readw readw
#define __raw_readl readl
#endif /* __ASSEMBLY__ */
#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_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))
#if defined(CONFIG_STAMP_CF) || defined(CONFIG_BFIN_IDE)
/* This hack for CF/IDE needs to be addressed at some point */
extern void cf_outsw(unsigned short *addr, unsigned short *sect_buf, int words);
extern void cf_insw(unsigned short *sect_buf, unsigned short *addr, int words);
extern unsigned char cf_inb(volatile unsigned char *addr);
extern void cf_outb(unsigned char val, volatile unsigned char *addr);
#undef inb
#undef outb
#undef insw
#undef outsw
#define inb(addr) cf_inb((void *)(addr))
#define outb(x, addr) cf_outb((unsigned char)(x), (void *)(addr))
#define insw(port, addr, cnt) cf_insw((void *)(addr), (void *)(port), cnt)
#define outsw(port, addr, cnt) cf_outsw((void *)(port), (void *)(addr), cnt)
#endif
#endif
#endif
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