/* *  arch/blackfin/kernel/flat.c * *  Copyright (C) 2007 Analog Devices, Inc. * * 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 */#include <linux/module.h>#include <linux/sched.h>#include <linux/flat.h>#define FLAT_BFIN_RELOC_TYPE_16_BIT 0#define FLAT_BFIN_RELOC_TYPE_16H_BIT 1#define FLAT_BFIN_RELOC_TYPE_32_BIT 2unsigned long bfin_get_addr_from_rp(unsigned long *ptr,		unsigned long relval,		unsigned long flags,		unsigned long *persistent){	unsigned short *usptr = (unsigned short *)ptr;	int type = (relval >> 26) & 7;	unsigned long val;	switch (type) {	case FLAT_BFIN_RELOC_TYPE_16_BIT:	case FLAT_BFIN_RELOC_TYPE_16H_BIT:		usptr = (unsigned short *)ptr;		pr_debug("*usptr = %x", get_unaligned(usptr));		val = get_unaligned(usptr);		val += *persistent;		break;	case FLAT_BFIN_RELOC_TYPE_32_BIT:		pr_debug("*ptr = %lx", get_unaligned(ptr));		val = get_unaligned(ptr);		break;	default:		pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type);		return 0;	}	/*	 * Stack-relative relocs contain the offset into the stack, we	 * have to add the stack's start address here and return 1 from	 * flat_addr_absolute to prevent the normal address calculations	 */	if (relval & (1 << 29))		return val + current->mm->context.end_brk;	if ((flags & FLAT_FLAG_GOTPIC) == 0)		val = htonl(val);	return val;}EXPORT_SYMBOL(bfin_get_addr_from_rp);/* * Insert the address ADDR into the symbol reference at RP; * RELVAL is the raw relocation-table entry from which RP is derived */void bfin_put_addr_at_rp(unsigned long *ptr, unsigned long addr,		unsigned long relval){	unsigned short *usptr = (unsigned short *)ptr;	int type = (relval >> 26) & 7;	switch (type) {	case FLAT_BFIN_RELOC_TYPE_16_BIT:		put_unaligned(addr, usptr);		pr_debug("new value %x at %p", get_unaligned(usptr), usptr);		break;	case FLAT_BFIN_RELOC_TYPE_16H_BIT:		put_unaligned(addr >> 16, usptr);		pr_debug("new value %x", get_unaligned(usptr));		break;	case FLAT_BFIN_RELOC_TYPE_32_BIT:		put_unaligned(addr, ptr);		pr_debug("new ptr =%lx", get_unaligned(ptr));		break;	}}EXPORT_SYMBOL(bfin_put_addr_at_rp);