/*
 * OpenRISC Linux
 *
 * Linux architectural port borrowing liberally from similar works of
 * others.  All original copyrights apply as per the original source
 * declaration.
 *
 * OpenRISC implementation:
 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
 * et al.
 *
 * 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.
 */

#ifndef __ASM_OPENRISC_ELF_H
#define __ASM_OPENRISC_ELF_H

/*
 * This files is partially exported to userspace.  This allows us to keep
 * the ELF bits in one place which should assist in keeping the kernel and
 * userspace in sync.
 */

/*
 * ELF register definitions..
 */

/* for struct user_regs_struct definition */
#include <asm/ptrace.h>

/* The OR1K relocation types... not all relevant for module loader */
#define R_OR32_NONE	0
#define R_OR32_32	1
#define R_OR32_16	2
#define R_OR32_8	3
#define R_OR32_CONST	4
#define R_OR32_CONSTH	5
#define R_OR32_JUMPTARG	6
#define R_OR32_VTINHERIT 7
#define R_OR32_VTENTRY	8

typedef unsigned long elf_greg_t;

/*
 * Note that NGREG is defined to ELF_NGREG in include/linux/elfcore.h, and is
 * thus exposed to user-space.
 */
#define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];

/* A placeholder; OR32 does not have fp support yes, so no fp regs for now.  */
typedef unsigned long elf_fpregset_t;

/* This should be moved to include/linux/elf.h */
#define EM_OR32         0x8472
#define EM_OPENRISC     92     /* OpenRISC 32-bit embedded processor */

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_ARCH	EM_OR32
#define ELF_CLASS	ELFCLASS32
#define ELF_DATA	ELFDATA2MSB

#ifdef __KERNEL__

#include <linux/types.h>

/*
 * This is used to ensure we don't load something for the wrong architecture.
 */

#define elf_check_arch(x) \
	(((x)->e_machine == EM_OR32) || ((x)->e_machine == EM_OPENRISC))

/* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
   use of this is to invoke "./ld.so someprog" to test out a new version of
   the loader.  We need to make sure that it is out of the way of the program
   that it will "exec", and that there is sufficient room for the brk.  */

#define ELF_ET_DYN_BASE         (0x08000000)

/*
 * Enable dump using regset.
 * This covers all of general/DSP/FPU regs.
 */
#define CORE_DUMP_USE_REGSET

#define ELF_EXEC_PAGESIZE	8192

extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt);
#define ELF_CORE_COPY_REGS(dest, regs) dump_elf_thread(dest, regs);

/* This yields a mask that user programs can use to figure out what
   instruction set this cpu supports.  This could be done in userspace,
   but it's not easy, and we've already done it here.  */

#define ELF_HWCAP	(0)

/* This yields a string that ld.so will use to load implementation
   specific libraries for optimization.  This is more specific in
   intent than poking at uname or /proc/cpuinfo.

   For the moment, we have only optimizations for the Intel generations,
   but that could change... */

#define ELF_PLATFORM	(NULL)

#define SET_PERSONALITY(ex) set_personality(PER_LINUX)

#endif /* __KERNEL__ */
#endif