1/* 2 * DaVinci I/O mapping code 3 * 4 * Copyright (C) 2005-2006 Texas Instruments 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11#include <linux/module.h> 12#include <linux/io.h> 13 14#include <asm/tlb.h> 15#include <asm/mach/map.h> 16 17#include <mach/common.h> 18 19/* 20 * Intercept ioremap() requests for addresses in our fixed mapping regions. 21 */ 22void __iomem *davinci_ioremap(unsigned long p, size_t size, unsigned int type) 23{ 24 struct map_desc *desc = davinci_soc_info.io_desc; 25 int desc_num = davinci_soc_info.io_desc_num; 26 int i; 27 28 for (i = 0; i < desc_num; i++, desc++) { 29 unsigned long iophys = __pfn_to_phys(desc->pfn); 30 unsigned long iosize = desc->length; 31 32 if (p >= iophys && (p + size) <= (iophys + iosize)) 33 return __io(desc->virtual + p - iophys); 34 } 35 36 return __arm_ioremap_caller(p, size, type, 37 __builtin_return_address(0)); 38} 39EXPORT_SYMBOL(davinci_ioremap); 40 41void davinci_iounmap(volatile void __iomem *addr) 42{ 43 unsigned long virt = (unsigned long)addr; 44 45 if (virt >= VMALLOC_START && virt < VMALLOC_END) 46 __iounmap(addr); 47} 48EXPORT_SYMBOL(davinci_iounmap); 49