Signed-off-by: Richard Kuo --- arch/hexagon/mm/ioremap.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) Index: linux-hexagon-kernel/arch/hexagon/mm/ioremap.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-hexagon-kernel/arch/hexagon/mm/ioremap.c 2011-08-24 18:45:48.433877368 -0500 @@ -0,0 +1,57 @@ +/* + * I/O remap functions for Hexagon + * + * Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include +#include + +void __iomem *ioremap_nocache(unsigned long phys_addr, unsigned long size) +{ + unsigned long last_addr, addr; + unsigned long offset = phys_addr & ~PAGE_MASK; + struct vm_struct *area; + + pgprot_t prot = __pgprot(_PAGE_PRESENT|_PAGE_READ|_PAGE_WRITE + |(__HEXAGON_C_DEV << 6)); + + last_addr = phys_addr + size - 1; + + /* Wrapping not allowed */ + if (!size || (last_addr < phys_addr)) + return NULL; + + /* Rounds up to next page size, including whole-page offset */ + size = PAGE_ALIGN(offset + size); + + area = get_vm_area(size, VM_IOREMAP); + addr = (unsigned long)area->addr; + + if (ioremap_page_range(addr, addr+size, phys_addr, prot)) { + vunmap((void *)addr); + return NULL; + } + + flush_cache_vmap(addr, addr+size); + return (void __iomem *) (offset + addr); +} + +void __iounmap(const volatile void __iomem *addr) +{ + vunmap((void *) ((unsigned long) addr & PAGE_MASK)); +} -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/