linux-stable/arch/blackfin/kernel/flat.c
Robin Getz 96f1050d3d Blackfin: mass clean up of copyright/licensing info
Bill Gatliff & David Brownell pointed out we were missing some
copyrights, and licensing terms in some of the files in
./arch/blackfin, so this fixes things, and cleans them up.

It also removes:
 - verbose GPL text(refer to the top level ./COPYING file)
 - file names (you are looking at the file)
 - bug url (it's in the ./MAINTAINERS file)
 - "or later" on GPL-2, when we did not have that right

It also allows some Blackfin-specific assembly files to be under a BSD
like license (for people to use them outside of Linux).

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2009-10-07 04:36:26 -04:00

84 lines
2 KiB
C

/*
* Copyright 2007 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#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 2
unsigned 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);