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Diffstat (limited to 'include/asm-blackfin/io-kernel.h')
| -rw-r--r-- | include/asm-blackfin/io-kernel.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/include/asm-blackfin/io-kernel.h b/include/asm-blackfin/io-kernel.h new file mode 100644 index 000000000..0b0572ffa --- /dev/null +++ b/include/asm-blackfin/io-kernel.h @@ -0,0 +1,135 @@ +/* + * 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 |