/* * 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(); } /* function prototypes for CF support */ 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); /* * 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)) #define inb(addr) cf_inb((volatile unsigned char *)(addr)) #define outb(x, addr) cf_outb((unsigned char)(x), (volatile unsigned char *)(addr)) #define insw(port, addr, count) cf_insw((unsigned short *)addr, (unsigned short *)(port), (count)) #define outsw(port, addr, count) cf_outsw((unsigned short *)(port), (unsigned short *)addr, (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 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); extern void blkfin_inv_cache_all(void); #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) #endif #endif